U.S. PATENT AND TRADEMARK OFFICE
Information Products Division |
U.S. Patent Classification System - Classification Definitions
as of June 30, 2000
Patents classified in a subclass may be accessed by either clicking on
the subclass number
preceding each subclass definition or on the
" " icon, below.
( please note that patents for some subclasses may not be available )
For classification search strategies, please refer to the
Classification Index
Explanation of Data web page.
(definitions have been obtained from the
Patents ASSIST CD-ROM which
is produced by the U.S. Patent and Trademark Office
Electronic Products Branch)
Class 454
VENTILATION
Class Definition:
This is the parent class for apparatus and processes for
supplying air to and removing it from enclosures, for
distributing and circulating the air therein, or for
preventing its contamination.
REFERENCES TO OTHER CLASSES
SEE OR SEARCH CLASS:
2, Apparel, subclasses 171+ for head coverings (e.g., hats)
which may include ventilation.
4, Baths, Closets, Sinks, and Spittoons, appropriate
subclasses for ventilation of devices forming the subject
matter of that class, particularly, subclasses 209+ and 306
for ventilation of urinals; subclasses 347+ for ventilation
of flush closets; and subclasses 472, 475, 477, and 482 for
ventilation of dry closets.
5, Beds, subclasses 706+ for ventilation of a mattress.
34, Drying and Gas or Vapor Contact With Solids, appropriate
subclasses for ventilation processes and apparatus combined
with added steps or means to cause drying or gas or vapor
contact with solids.
36, Boots, Shoes, and Leggings, subclass 3 for ventilation
of boots or shoes.
52, Static Structures (e.g., Buildings) subclasses 198+
for structure forming an enclosure for or a cover over a room
or compartment and having a fluid guiding port in an outer
barrier communicating between the space and ambient, subclass
200 for an enclosure located on and within the periphery of a
roof and having an open bottom or passage communicating with
the space beneath the roof (e.g., cupola), subclasses 204.5+
for passageways which traverse a barrier and which allow
passage of air, subclass 218 for a flue with gaseous fluid
directing features, and subclass 219 for a flue connection to
building structures.
62, Refrigeration, appropriate subclasses for ventilated
rooms or chambers in combination with cooling or
refrigeration means specialized to refrigeration. The mere
inclusion of a cooler for the air or means subjecting the air
to air-liquid contact is not considered a means specialized
to refrigeration.
95, Gas Separation: Processes, for processes of gas
separation, per se, in which dust or other contaminants are
removed from air.
96, Gas Separation: Apparatus, for apparatus for gas
separation, per se, in which dust or other contaminants are
removed from air.
105, Railway Rolling Stock, subclasses 350+ for passenger
car constructions tending to lessen the dust contents of the
air in the vicinity of car doors and windows.
114, Ships, subclass 187 for steamboat stacks and chimneys
specially adapted to use on vessels and subclasses 211+ for
ventilating devices specific to ships and involving the
structure of the ship.
126, Stoves and Furnaces, appropriate subclasses for the
combination of ventilating and heating wherein significant
heating structure (i.e., more than a nominal recitation such
as a broadly recited "heating means") is claimed. See
specifically subclasses 21+ for ventilated ovens,
subclasses 67+ for heating stoves provided with means for
heating and circulating a current of air, subclass 80 for
heating stoves provided with special ventilating attachments
or features, subclasses 99+ for furnaces which heat air in an
enclosing case or jacket to be distributed to points remote
from the furnace, subclass 113 for the combination of an air
moistener with a hot air furnace, subclass 198 for oven doors
provided with means for ingress and egress of air, subclass
279 for ventilating platforms for stoves and furnaces,
subclass 287.5 for fusible release-type stove or furnace
dampers, subclass 293 for the combination of a
smoke-controlling damper and a ventilating damper which are
interconnected so that the movement of one operates to move
the other, subclasses 299+ for stove hoods designed to carry
off odors from kitchen ranges, subclass 312 for stovepipe
ventilation, subclass 313 for air moistening attachments to
stovepipes, subclass 316 for a combined stove pipe thimble
and ventilator, and subclass 508 for a fireplace with a room
humidifier.
128, Surgery, subclass 205.26 for ventilating chambers
usable by a patient such as oxygen tents and hyperbaric
chambers.
135, Tent, Canopy, Umbrella, and Cane, subclasses 93+ for
ventilation of a portable structure (e.g., tent).
137, Fluid Handling, subclass 216 for vents in fluid lines
to prevent backflow (e.g., antisyphon devices).
160, Flexible or Portable Closure, Partition, or Panel, for
ventilating devices (1) in the form of panels in which a
flexible fabric or other flexible sheet material forms the
panel portions; (2) in the form of panel units formed of
plural strips, slats, or panels interconnected for relative
motion (excluding those connected only by a common operator
or mounted on a common support); (3) panels in the form of
portable partitions, and (4) parts (1) - (3) combined with
each other or with rigid closures or other rigid panels.
Ventilators, as above, combined with additional means (as
pumps, valves, baffles, etc.) to cause, control, or direct
the flow of air are in Class 454, Ventilation. Closures and
panel units in the form of grilles, shutters, or registers,
whether of the stationary or noninterconnnected pivoted-vane
type, have been treated as rigid panels.
165, Heat Exchange, subclass 59, 234+, and 248+, for the
combination of air distribution means with specific heat
exchange means adapted to heat or cool the air and subclass
60 for the combination of an air moistening device with a
specific heat exchange means adapted to heat or cool a
chamber.
210, Liquid Purification or Separation, subclasses 163+ for
a grated fluid inlet.
217, Wooden Receptacles, subclass 42 for ventilated crates
and subclass 74 for ventilated barrels.
236, Automatic Temperature and Humidity Regulation, for
automatically operating mechanisms for controlling
temperature or humidity, per se. Class 236 does not include
claims to the devices or systems controlled.
237, Heating Systems, appropriate subclasses and particularly
subclasses 46+ for the combination of ventilating and
heating wherein significant heating structure (i.e., more
than a nominal recitation such as a broadly recited "heating
means") is claimed.
239, Fluid Sprinkling, Spraying, and Diffusing, subclasses
34+ for slow diffusers, per se, and subclass 270 for a
nozzle having an air supply means to the operator.
261, Gas and Liquid Contact Apparatus, appropriate subclasses
for air moistening devices, per se, and subclasses 127+ for
heating and cooling devices combined with moisteners for the
air. Devices including significant ventilating structure and
excluding specific heating or cooling structure will be found
in Class 454.
280, Land Vehicles, subclasses 847+ for devices for
protecting the occupants of a vehicle or the vehicle itself
from dust and mud incident to the use of that vehicle.
296, Land Vehicles: Bodies and Tops, subclass 84.1 for
vehicle windshields.
399, Electrophotography, subclasses 92+ for internal
machine environment having a forced air circulation and
subclasses 246+ for sprayed liquid developer applications.
404, Road Structure, Process, or Apparatus, subclasses 25+
for a pavement with a load bearing vault cover-closure which
may include openings or vents.
415, Rotary Kinetic Fluid Motors or Pumps, for a blower, per
se.
416, Fluid Reaction Surfaces (i.e., Impellers), for a fan,
per se.
417, Pumps, for a motor driven blower, per se.
SUBCLASSES
Subclass:
1
CHIMNEY OR STACK:
This subclass is indented under the class definition. Subject
matter relating to a generally vertical, projecting, conduit
section having an uppermost portion which opens to a
surrounding environment, whereby air or products of
combustion can flow between a ventilated space and the
surrounding environment.
(1) Note. This and indented subclasses provide a residual
location for chimney or stack structure not properly
classified in other classes.
(2) Note. A mere opening, for example in a roof, is not
considered to be a vertical conduit section.
(3) Note. The vertical conduit section usually projects
above a roof such as that of a building.
(4) Note. This subclass does not include attic ventilators
nor ceiling outlets ducted directly through the roof since
they lack a "substantially vertically extending conduit
section."
SEE OR SEARCH CLASS:
52, Static Structures (e.g., Buildings) subclass 218 for
building structure with a flue having a gaseous
fluid-directing feature which is not located in the chimney
stacktop structure or cowl, subclass 219 for a connection
between a flue and building structure, subclasses 245+ for a
static structure including a barrier (e.g., wall, etc.) which
has its opposite faces both curvilinear and substantially
parallel.
110, Furnaces, subclass 184 for a metal smokestack combined
with particular solid material combustion apparatus in a
locomotive or portable boiler.
114, Ships, subclass 187 for steamboat stacks or chimneys
adapted for use on vessels and having particular ship
structure.
126, Stoves and Furnaces, subclasses 285+ for chimney or
stack dampers, per se, not incorporated in chimneytop or
stacktop structure and subclasses 307+ for miscellaneous
smoke flues combined with particular stove or furnace
apparatus provided for the application of heat.
285, Pipe Joints or Couplings, subclasses 42+ for a pipe
with a roof junction which includes flashing.
Subclass:
2
Vehicle:
This subclass is indented under subclass 1. Subject matter
wherein the ventilated space is in a device for transporting
passengers, goods, or equipment.
(1) Note. This subclass provides a residual location for
vehicle chimney or stack structure not properly classified in
other classes.
SEE OR SEARCH CLASS:
110, Furnaces, subclass 184 for a metal smokestack combined
with particular solid material combustion apparatus in a
locomotive or portable boiler.
114, Ships, subclass 187 for steamboat stacks or chimneys
adapted for use on vessels and having particular ship
structure.
Subclass:
3
Chimneytop or stacktop structure (e.g., cowl):
This subclass is indented under subclass 1. Subject matter
comprising structure at an uppermost end of the vertical
conduit section.
(1) Note. Cowl structure is included in this subclass.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 339+ for structure at the end of an outlet
conduit section. See, in particular, subclass 368.
SEE OR SEARCH CLASS:
52, Static Structures (e.g., Buildings) subclass 200 for
cupolas, subclass 218 for flues with gas inlets and internal
gas directing features (see the notes to that subclass), and
subclass 244 for a cap which is mounted on and covers the
exposed terminal edge of a barrier which encloses a space,
e.g., chimney top guards.
Subclass:
4
Cap closure:
This subclass is indented under subclass 3. Subject matter
comprising a cover which can be positioned over the opening
in the vertical conduit's uppermost section to stop flow
therethrough of air or products of combustion.
SEE OR SEARCH THIS CLASS, SUBCLASS:
94 for a railcar, bus, or trailer having an exterior cap
closure for a vent.
275 for an inlet airway having a specific cover or shield
for an exterior vent opening.
subclasses 347+ for an outlet airway having an air pump and
which may include a readily moveable cover.
355 for an outlet airway having an air pump and including a
moveable access cover.
356 for an outlet airway having an air pump and including an
exterior neck with an enlarged, weather resistant cover.
subclasses 358+ for other outlet airways which may include
a readily moveable cover.
subclasses 368+ for other outlet airways with a specific
cover or shield for an exterior vent opening.
SEE OR SEARCH CLASS:
138, Pipes and Tubular Conduits, subclasses 89+ for pipes
and tubular conduits with closures and plugs.
Subclass:
5
Pivoted:
This subclass is indented under subclass 4. Subject matter
wherein the cover rotates about an axis.
SEE OR SEARCH THIS CLASS, SUBCLASS:
30 for a pivoted outlet air current regulator used in a
chimney or stacktop.
363 for a pivoted damper panel or cover used in an outlet
airway.
Subclass:
6
Plural, separately pivoted portions:
This subclass is indented under subclass 5. Subject matter
wherein the cover comprises at least two parts, each part
rotating independently about the same or different fixed
axes.
SEE OR SEARCH THIS CLASS, SUBCLASS:
31 for plural pivoted air current regulating means in a
chimney or stacktop structure.
351 and 352, for plural damper panels in an outlet airway
Subclass:
7
Having remote control:
This subclass is indented under subclass 5. Subject matter
comprising means for rotating the cover about the fixed axis
from a location distant from the cover.
(1) Note. Pressure of air or products of combustion within
the vertical conduit section, which directly acts on the
cover to rotate it open and closed, does not constitute
remote cap pivoting means for the purposes of this subclass.
SEE OR SEARCH CLASS:
236, Automatic Temperature and Humidity Regulation,
appropriate subclasses for an automatically operated
mechanism for controlling temperature or humidity which does
not include the device or system controlled.
Subclass:
8
Inlet and outlet:
This subclass is indented under subclass 3. Subject matter
comprising separate passages for directing air or products of
combustion to and from the ventilated space.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 103+ for a railcar, bus, or trailer having both
inlet and outlet airways.
subclasses 141+ for other vehicles having both inlet and
outlet airways.
subclasses 237+ for static structures (e.g., buildings)
having both inlet and outlet airways, particularly, subclass
242, for a rooftop, unitary inlet and outlet housing having
both inlet and outlet airways, which housing is not
associated with a chimney or stack.
Subclass:
9
Having air current responsive adjustment means (e.g., wind
vane, etc.):
This subclass is indented under subclass 8. Subject matter
comprising a means which alters a position or operation of
the structure in reaction to a change in (1) flow of natural
air (i.e., wind) or (2) flow of air or products of combustion
through the vertical conduit section.
SEE OR SEARCH THIS CLASS, SUBCLASS:
11 for an air current responsive adjustment means associated
with chimney or stacktop structure which includes an inlet
only (no claimed outlet) to a ventilated space.
17 for an air current responsive adjustment means associated
with chimney or stacktop structure which includes a rotary
means in the air current (e.g., fan etc.).
20 for an air current responsive adjustment means associated
with chimney or stacktop structure which includes an outlet
only (no claimed inlet) to a ventilated space.
Subclass:
10
Inlet:
This subclass is indented under subclass 3. Subject matter
comprising a passage for directing air to the ventilated
space.
SEE OR SEARCH THIS CLASS, SUBCLASS:
107 for railcars, buses, or trailers having inlet airways.
subclasses 143+ for other vehicles having inlet airways.
subclasses 254+ for static structures (e.g., buildings)
having inlet airways.
Subclass:
11
Having air current responsive adjustment means (e.g., wind
vane, etc.):
This subclass is indented under subclass 10. Subject matter
comprising a means which alters a position or operation of
the structure in reaction to a change in (1) flow of natural
air (i.e., wind) or (2) flow of air or products of combustion
through the vertical conduit section.
SEE OR SEARCH THIS CLASS, SUBCLASS:
9 for an air current responsive adjustment means associated
with chimney or stacktop structure which includes both an
inlet and outlet to a ventilated space.
17 for an air current responsive adjustment means associated
with chimney or stacktop structure which includes a rotary
means in the air current (e.g., fan etc.).
20 for an air current responsive adjustment means associated
with chimney or stacktop structure which includes an outlet
only (no claimed inlet) to a ventilated space.
Subclass:
12
With means for mounting on brick-type chimney:
This subclass is indented under subclass 3. Subject matter
comprising means uniting the structure to an uppermost end of
a brick or ceramic vertical conduit section (i.e., chimney).
Subclass:
13
Chimneytop structure extends within chimney:
This subclass is indented under subclass 12. Subject matter
wherein a portion of the structure is located in an interior
portion of the brick or ceramic conduit section.
Subclass:
14
Means for mounting to inner wall:
This subclass is indented under subclass 13. Subject matter
wherein the uniting means fastens the structure to an
interior surface of the brick or ceramic conduit section.
Subclass:
15
With rotary means in air current (e.g., fan, etc.):
This subclass is indented under subclass 3. Subject matter
comprising a unidirectionally rotating member which acts on
or is acted on by (1) flow of natural air (i.e., wind) or (2)
flow of air or products of combustion through the vertical
conduit section.
(1) Note. The member may be referred to as a rotor, wheel,
bucket wheel, rotary fan, etc.
SEE OR SEARCH THIS CLASS, SUBCLASS:
101 for a wind-operated recirculating fan associated with a
railcar, bus, or trailer.
106 for other railcar, bus, or trailer wind-operated fans
associated with an inlet and outlet airway.
113 for other railcar, bus, or trailer wind-operated fans
associated with an inlet airway only.
117 for a railcar, bus, or trailer having a wind-operated
fan associated with an outlet airway.
240 for a wind-operated air pump associated with a building
having both an inlet and an outlet airway.
Subclass:
16
Driven by external power source:
This subclass is indented under subclass 15. Subject matter
wherein the member is unidirectionally rotated by a means
other than (1) flow of natural air (i.e., wind) or (2) flow
of air or products of combustion through the vertical conduit
section.
(1) Note. The means to unidirectionally rotate the member is
commonly an electric or pneumatic motor.
Subclass:
17
Having air current responsive adjustment means (e.g., wind
vane, etc.):
This subclass is indented under subclass 15. Subject matter
comprising a means which alters the position or operation of
the structure or a part thereof in reaction to a change in
(1) flow of natural air (i.e., wind) or (2) flow of air or
products of combustion through the vertical conduit section.
SEE OR SEARCH THIS CLASS, SUBCLASS:
9 for an air current responsive adjustment means associated
with chimney or stacktop structure which includes both an
inlet and outlet to a ventilated space.
11 for an air current responsive adjustment means associated
with chimney or stacktop structure which includes an inlet
only (no claimed outlet) to a ventilated space.
Subclass:
18
Cage-type blade set:
This subclass is indented under subclass 15. Subject matter
wherein the unidirectionally rotating member comprises a
hollow cylinder with two or more strip-like (blade)
structures extending along the periphery thereof, which
structures act on or are acted on by (1) flow of natural air
(i.e., wind) or (2) flow of air or products of combustion
through the vertical conduit section.
(1) Note. A cage-type blade set is often referred to as a
turbine.
Subclass:
19
Including additional blade set:
This subclass is indented under subclass 18. Subject matter
further comprising a different group of rotating member
(blade) structures acting on or being acted upon by (1) flow
of natural air (i.e., wind) or (2) flow of air or products of
combustion through the vertical conduit.
Subclass:
20
Having air current responsive adjustment means:
This subclass is indented under subclass 3. Subject matter
comprising a means which alters the position or operation of
the structure or a part thereof in reaction to a change in
(1) flow of natural air (i.e., wind) or (2) flow of air or
products of combustion through the vertical conduit section.
SEE OR SEARCH THIS CLASS, SUBCLASS:
9 for an air current responsive adjustment means associated
with chimney or stacktop structure which includes both an
inlet and outlet to a ventilated space.
11 for an air current responsive adjustment means associated
with chimney or stacktop structure which includes an inlet
only (no claimed outlet) to a ventilated space.
17 for an air current responsive adjustment means associated
with chimney or stacktop structure which includes a rotary
means in the air current (e.g., fan etc.).
Subclass:
21
Wind vane:
This subclass is indented under subclass 20. Subject matter
wherein the structure or a portion thereof rotates to
maintain a particular orientation relative to changing
natural air (i.e., wind) flow direction.
(1) Note. The structure usually rotates about a vertical
axis.
Subclass:
22
With air current inducing jet:
This subclass is indented under subclass 21. Subject matter
comprising a nozzle which ejects a high velocity flow stream
to cause air or products of combustion to flow through the
vertical conduit section.
(1) Note. The high velocity flow stream is usually diverted
natural air current (i.e., wind).
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 39+ for other chimney or stacktop structures
which use current inducing jets to induce flow in the outlet
airway.
116 for a railcar, bus, or trailer which uses a current
inducing jet (often wind caused by the movement of the
vehicle) to induce flow in the outlet airway.
163 for other vehicles which use a current inducing jet
(often wind caused by the movement of the vehicle) to induce
flow in the outlet airway.
Subclass:
23
Centered within induced air current:
This subclass is indented under subclass 22. Subject matter
wherein the nozzle and its ejected flow stream lie in the
middle of the air or products of combustion being caused to
flow.
Subclass:
24
Shield:
This subclass is indented under subclass 21. Subject matter
wherein the rotating structure is a generally vertical
deflector which shelters the vertical conduit section's
uppermost portion from direct exposure to the natural air
current (i.e., wind).
(1) Note. A generally horizontal, angled deflector which
lies directly over an upwardly facing opening of the vertical
conduit is not included in this subclass.
Subclass:
25
Hood having outlet opening perpendicular to wind:
This subclass is indented under subclass 21. Subject matter
wherein the structure comprises a cover means over the
opening in the vertical conduit's uppermost section, the
cover means rotating to maintain an air or products of
combustion exhaust opening therein facing at a right angle to
the natural air flow direction.
Subclass:
26
Current regulator:
This subclass is indented under subclass 20. Subject matter
wherein the means varies flow of air or products of
combustion through the vertical conduit section.
SEE OR SEARCH THIS CLASS, SUBCLASS:
27 for a current regulator which is not air current
responsive.
SEE OR SEARCH CLASS:
126, Stoves and Furnaces, subclasses 285+ for a flow
regulating damper, per se.
Subclass:
27
Having readily movable air current regulating means:
This subclass is indented under subclass 3. Subject matter
wherein the structure comprises a means which is easily
shiftable to alter flow of air or products of combustion
through the vertical conduit section.
(1) Note. A means held in a single fixed position by a
separate movable screw or bolt or other permanent-type tool
actuated fastener is not considered "readily movable."
SEE OR SEARCH THIS CLASS, SUBCLASS:
26 for a chimneytop or stacktop structure having air current
regulating means which is air current responsive.
subclasses 347+ and 358, for other types of outlet
ventilators with a readily movable louver, damper, or cover.
355 for an air pump outlet airway with a movable access
cover which also may affect the flow of air.
SEE OR SEARCH CLASS:
126, Stoves and Furnaces, subclasses 285+ for chimney or
stack dampers, per se, not incorporated in chimneytop or
stacktop structure.
Subclass:
28
With temperature sensitive release:
This subclass is indented under subclass 27. Subject matter
wherein the shiftable means moves in reaction to
temperature.
SEE OR SEARCH THIS CLASS, SUBCLASS:
257 for a building inlet airway including an emergency smoke
or fire responsive valve.
342 for a building outlet airway including an air pump and
having means for controlling or dealing with smoke.
357 for other building outlet airways having means for
controlling or dealing with smoke.
369 for fusible release controlled fire dampers.
SEE OR SEARCH CLASS:
126, Stoves and Furnaces, subclass 287.5 for fusible release
dampers for stoves or furnaces.
169, Fire Extinguishers, particularly subclass 42 and 56+
for fire extinguishing apparatus responsive to smoke or
fire.
236, Automatic Temperature and Humidity Regulation, various
subclasses for an automatic mechanism for controlling
temperature which does not include the device or system
controlled.
Subclass:
29
Continuously horizontal panel:
This subclass is indented under subclass 27. Subject matter
wherein the shiftable means comprises a multiposition plate
which is maintained parallel to the horizon while in use and
while motion is being imparted to it.
SEE OR SEARCH THIS CLASS, SUBCLASS:
348 and 362, for continuously horizontal damper panels used
with outlet airways.
Subclass:
30
Pivoted:
This subclass is indented under subclass 27. Subject matter
wherein the shiftable means rotates about a fixed axis.
SEE OR SEARCH THIS CLASS, SUBCLASS:
5 for pivoted chimney or stacktop cap closures.
363 for a pivoted damper panel in an outlet airway.
Subclass:
31
Plural:
This subclass is indented under subclass 30. Subject matter
having two such shiftable means which rotate about the same
or different fixed axes.
SEE OR SEARCH THIS CLASS, SUBCLASS:
6 for plural pivoted chimney or stacktop closures.
351 and 352, for plural damper panels in an outlet airway.
Subclass:
32
T-top:
This subclass is indented under subclass 3. Subject matter
wherein the structure comprises two arms which, with the
vertical conduit section, form a T-shape.
Subclass:
33
Spiral or plural stacked rings:
This subclass is indented under subclass 3. Subject matter
wherein the structure comprises (1) spaced-apart,
helically-arranged strips or (2) rings spaced apart and
positioned one above another.
Subclass:
34
Four-side outlets with shield:
This subclass is indented under subclass 3. Subject matter
wherein the structure comprises exhaust openings 90 degrees
apart with a deflector across each opening to prevent back
draft.
Subclass:
35
Spaced cap:
This subclass is indented under subclass 3. Subject matter
comprising a cover above and at a distance from the uppermost
portion of the vertical pipe or conduit section.
Subclass:
36
And spaced shield:
This subclass is indented under subclass 35. Subject matter
comprising a structure which surrounds, is located at a
distance from, and which shelters an area immediately above
the uppermost portion of the vertical conduit section.
(1) Note. The structure usually protects the uppermost
portion of the conduit section from direct exposure to
natural air currents (i.e., wind).
Subclass:
37
And skirt deflector extending outwardly from chimney or
stack:
This subclass is indented under subclass 36. Subject matter
wherein the vertical conduit section has a flange surrounding
and stretching away therefrom for guiding air, products of
combustion, or water.
SEE OR SEARCH THIS CLASS, SUBCLASS:
38 for other skirt deflectors in combination with a spaced
cap.
Subclass:
38
And skirt deflector extending outwardly from chimney or
stack:
This subclass is indented under subclass 35. Subject matter
wherein the vertical conduit section has a flange surrounding
and stretching away therefrom for guiding air, products of
combustion, or water.
SEE OR SEARCH THIS CLASS, SUBCLASS:
37 for a structure comprising a spaced shield and a skirt
deflector extending outwardly from a chimney or stack.
Subclass:
39
Having air current inducing jet:
This subclass is indented under subclass 3. Subject matter
comprising a nozzle for ejecting a high velocity fluid stream
which causes flow of air or products of combustion through
the vertical conduit section.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 22+ for a chimney or stacktop which uses a
diverted natural air current to induce flow in the outlet
airway.
116 for a railcar, bus, or trailer which uses a current
inducing jet (often wind caused by movement of the vehicle)
to induce flow in the outlet airway.
163 for other vehicles which use a current inducing jet
(often wind caused by the movement of the vehicle) to induce
flow in the outlet airway.
Subclass:
40
Plural, in-series jets:
This subclass is indented under subclass 39. Subject matter
comprising two such nozzles, the high velocity fluid streams
issuing from the nozzles acting on the air or products of
combustion one after another in sequence.
Subclass:
41
Having liquid drain:
This subclass is indented under subclass 1. Subject matter
comprising means to remove liquid from the vertical conduit
section.
Subclass:
42
Having internal air current guide:
This subclass is indented under subclass 1. Subject matter
comprising a surface within the vertical conduit section
which straightens or diverts flow of air or products of
combustion through the conduit.
(1) Note. A mere vertical conduit wall is not considered to
be an internal current guide. Particular flow guiding wall
structure must be claimed for inclusion in this subclass.
SEE OR SEARCH CLASS:
126, Stoves and Furnaces, subclasses 285+ for chimney or
stack dampers, per se, not incorporated in chimneytop or
stacktop structure.
Subclass:
43
Having flue heater:
This subclass is indented under subclass 1. Subject matter
comprising means to heat the air or products of combustion to
increase their flow rate through the vertical conduit
section.
Subclass:
44
Having lining or sleeve:
This subclass is indented under subclass 1. Subject matter
comprising (1) an interior covering or coating for the
vertical conduit section or (2) a member which encases the
vertical conduit section.
SEE OR SEARCH CLASS:
285, Pipe Joints or Couplings, subclasses 47+ for a joint
or coupling with an insulated casing, lining, or protector.
Subclass:
45
Including breech opening:
This subclass is indented under subclass 44. Subject matter
comprising a side opening in a lower part of the vertical
conduit section for entrance of air or products of
combustion.
SEE OR SEARCH CLASS:
126, Stoves and Furnaces, subclasses 500+ for an open
recess fireplace in a chimney.
Subclass:
46
Pressurized air lining:
This subclass is indented under subclass 44. Subject matter
comprising a layer of air which encases the vertical conduit
section, the layer of air having a pressure above ambient.
Subclass:
47
Axially connected chimney or stack sections:
This subclass is indented under subclass 44. Subject matter
comprising at least two parts which are attached together
end-to-end to form the vertical conduit section.
SEE OR SEARCH CLASS:
285, Pipe Joints or Couplings, subclasses 47+ for a joint
or coupling with an insulated casing, lining, or protector.
Subclass:
48
EXTERIOR VAULT OR MANHOLE COVER:
This subclass is indented under the class definition. Subject
matter comprising a means positioned over an outdoor aperture
through which a person may enter a sewer, boiler, pipe,
conduit, drain, or underground or burial chamber.
(1) Note. The means usually acts to prevent outside debris
from entering the aperture.
SEE OR SEARCH CLASS:
404, Road Structure, Process, or Apparatus, subclasses 25+
for a pavement with a load bearing vault cover-closure which
may include openings or vents.
Subclass:
49
WORKSTATION VENTILATOR (E.G., HOOD, OFFTAKE, ETC.):
This subclass is indented under the class definition. Subject
matter particularly adapted to exhausting fumes, vapors,
steam, dust, or other undesirable air pollutants from a task
area where such pollutants have been generated.
(1) Note. The task area may be a welding, painting,
industrial process, or other area where a pollutant
generating job is performed.
(2) Note. Subject matter comprising specific details of the
pollutant generating device beyond those relating to
ventilation structures are properly classified with the
device.
(3) Note. Means for conducting away naturally occurring,
normally present particles from an area so as to render the
area particle free (e.g., clean room, etc.) is not included
in this subclass.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 168+ for a mine ventilator.
197 for a window related, bed or couch ventilator.
SEE OR SEARCH CLASS:
4, Baths, Closets, Sinks, and Spittoons, particularly
subclasses 209+ for bathroom ventilators.
15, Brushing, Scrubbing, and General Cleaning, particularly
subclass 300.1 for a cleaning machine using air blast or
suction devices.
30, Cutlery, particularly subclass 41.5, 124+, and 133 for a
cutlery device combined with various types of material
disposal means.
83, Cutting, particularly subclasses 98+ for cutting
devices having fluid current product handling means.
96, Gas Separation: Apparatus, for gas separation
apparatus.
104, Railways, particularly subclass 52 for a smoke remover
for use in roundhouses and train sheds over locomotive smoke
stacks.
126, Stoves and Furnaces, particularly subclasses 299+ for
a stove hood.
144, Woodworking, particularly subclass 252.1 for a device
for catching and confining the flying shavings and sawdust
from a cutting machine and for conveying them away from the
machine.
266, Metallurgical Apparatus, particularly subclass 158 and
159 for metallurgical apparatus with hood or offtake means
for handling gases exhausted by treating means.
451, Abrading, subclass 453 and 456 for a particle collector
or a dust hood with air exhausting means for drawing off dust
developed in a grinding operation.
Subclass:
50
Spray booth:
This subclass is indented under subclass 49. Subject matter
wherein the task area is particularly adapted to coating an
object with an atomized material such as paint or
electrostatic particles.
(1) Note. A workstation ventilator in combination with
specific coating means is properly classified elsewhere. See
the Search Class Note below.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 339+ for a ventilation outlet airway.
SEE OR SEARCH CLASS:
55, Gas Separation, particularly Digest 46 for spray booths
in which a gas is separated from a mixture.
118, Coating Apparatus, particularly subclass 326 for a hood
or offtake for waste material, and see the Search Class note
of subclass 326 for a further discussion of class lines
between this class and Class 118 (see (1) Note above); also
see digest 7 for a hood.
399, Electrophotography, subclasses 246+ for sprayed liquid
developer applications.
Subclass:
51
Having air inlet separate from access opening:
This subclass is indented under subclass 50. Subject matter
comprising an inlet passage for admitting air to the task
area which passage is distinct from an aperture allowing
admittance to the area by personnel or by the object to be
coated.
(1) Note. A mere doorway or window is not considered to be
an inlet passage.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 57+ for a covered workbench chamber having an
air inlet separate from an access opening.
66 for a workstation ventilator, in general, which has an
inlet airway.
Subclass:
52
Ceiling inlet:
This subclass is indented under subclass 51. Subject matter
wherein the inlet passage admits air to the task area through
a structural barrier above the area.
Subclass:
53
With outlet air treatment means:
This subclass is indented under subclass 50. Subject matter
comprising means to change a characteristic of the air being
exhausted from the task area.
(1) Note. For example, this subclass includes means for
removing noxious spray particles such as paint from the air
being exhausted.
SEE OR SEARCH CLASS:
96, Gas Separation: Apparatus, appropriate subclasses for
means for removing dust and other contaminants from air, per
se.
Subclass:
54
With means for liquid contact:
This subclass is indented under subclass 53. Subject matter
comprising means directly exposing the air being exhausted to
a liquid.
Subclass:
55
Spraying nozzle:
This subclass is indented under subclass 54. Subject matter
comprising an aperture through which the liquid is forcibly
ejected as a fine jet of dispersed droplets to be directly
exposed to the exhausting air.
Subclass:
56
Covered workbench chamber (e.g., fume hood, etc.):
This subclass is indented under subclass 49. Subject matter
wherein the task area is within a cabinet-like enclosure
which allows admittance by an operator to work on a task.
(1) Note. The enclosure need not enclose the task area on
all sides, but if it does, it must provide an entryway for
the work arms of an operator to work on a task.
SEE OR SEARCH CLASS:
126, Stoves and Furnaces, particularly subclasses 299+ for
a stove hood.
422, Chemical Apparatus and Process Disinfecting,
Deodorizing, Preserving, or Sterilizing, particularly
subclass 104 for a laboratory housing or hood, per se.
Subclass:
57
Having air inlet separate from access opening:
This subclass is indented under subclass 56. Subject matter
comprising an inlet passage for admitting air to the task
area, which passage is distinct from an aperture which allows
admittance to the area by the operator.
(1) Note. A device having an inlet passage which is adjacent
the aperture is included in this subclass provided the airway
is physically separated from the aperture.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 51+ for a spray booth having an air inlet
separate from an access opening.
66 for a workstation ventilator, in general, which has an
inlet airway.
Subclass:
58
Including flow adjustment means:
This subclass is indented under subclass 57. Subject matter
comprising means to alter direction or rate of air flow
through the inlet passage.
Subclass:
59
Responsive to position of access door:
This subclass is indented under subclass 58. Subject matter
wherein the means alters the direction or rate of air flow
dependent upon positioning of a closure for the aperture
which allows admittance to the task area by the operator.
Subclass:
60
And air outlet through access opening:
This subclass is indented under subclass 57. Subject matter
wherein air is exhausted from the task area by way of the
aperture which allows admittance to the task area by the
operator.
Subclass:
61
Having outlet airway flow adjustment means:
This subclass is indented under subclass 56. Subject matter
comprising a passage for exhausting air from the task area
and further comprising means to alter direction or rate of
flow of air flowing through the passage.
Subclass:
62
Plural airways with adjustable distribution means:
This subclass is indented under subclass 61. Subject matter
comprising two or more passages for exhausting air from the
task area and further comprising means to alter amounts of
the air exhausting through one of the passages relative to
another of the passages.
(1) Note. The two or more passages may connect to a common
outlet or suction pipe.
Subclass:
63
Movable:
This subclass is indented under subclass 49. Subject matter
comprising means for relocating the exhausting means or an
air collecting portion thereof from one position to another
during use.
(1) Note. While retractable or pivotable hoods are
considered proper for this subclass, generally movable planar
doors for a stationary hood are not proper.
Subclass:
64
Having sliding, communicating, airway duct sections:
This subclass is indented under subclass 63. Subject matter
comprising two or more connected air carrying conduit
sections which move relative to one another by a smooth,
gliding motion.
SEE OR SEARCH CLASS:
137, Fluid Handling, subclass 580 for a fluid handling
system with a sliding joint between moveable parts of the
system.
285, Pipe Joints or Couplings, subclass 298 for sliding,
communicating pipe sections.
Subclass:
65
Having canopy exhaust hood:
This subclass is indented under subclass 63. Subject matter
comprising a cover-like structure above the task area which
includes means to collect and exhaust air from the area.
SEE OR SEARCH THIS CLASS, SUBCLASS:
67 for a workstation ventilator having a nonmoveable canopy
exhaust hood.
Subclass:
66
Having inlet airway:
This subclass is indented under subclass 49. Subject matter
comprising an inlet passage for admitting air to the task
area.
(1) Note. Subject matter which merely recirculates air
within the task area is not included in this subclass.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 51+ for a spray booth having an air inlet
separate from an access opening.
subclasses 57+ for a covered workbench chamber having an
air inlet separate from an access opening.
Subclass:
67
Having canopy exhaust hood:
This subclass is indented under subclass 49. Subject matter
comprising a cover-like structure above the task area which
includes means to collect and exhaust air from the area.
SEE OR SEARCH THIS CLASS, SUBCLASS:
65 for a workstation ventilator having a moveable, canopy
exhaust hood.
Subclass:
68
ELEVATOR:
This subclass is indented under the class definition. Subject
matter comprising features peculiar to admitting air to,
exhausting air from, or circulating air about a (ventilated)
space in a device vertically raised and lowered to transport
passengers, goods, or equipment.
SEE OR SEARCH CLASS:
187, Elevator, Industrial Lift Truck, or Stationary Lift for
Vehicle, appropriate subclasses for particular elevator
structure.
Subclass:
69
VEHICLE (E.G., AUTOMOBILE, ETC.):
This subclass is indented under the class definition. Subject
matter comprising features peculiar to admitting air to,
exhausting air from, or circulating air about a (ventilated)
space in a device for transporting passengers, goods, or
equipment.
(1) Note. Subject matter relating to a mobile home which is
essentially stationary is not included in this and indented
subclasses. However, subject matter relating to a
self-propelled or towed recreational vehicle which is
essentially mobile is included in this subclass.
SEE OR SEARCH THIS CLASS, SUBCLASS:
2 for a chimney which admits air to or exhausts air from a
ventilated space in a vehicle.
68 for elevator ventilation structure.
Subclass:
70
Pressure regulation:
This subclass is indented under the class definition.
Apparatus including means responsive to air conditions either
in or outside of an enclosure or the air condition in the
supply system for the enclosure to maintain a predetermined
pressure in said enclosure and/or a difference in pressure
between said enclosure and the outside atmosphere.
(1) Note. Systems which maintain enclosures under air
pressure but having no air condition responsive automatic
controls are in other appropriate subclasses of this class,
e.g., those having differential air input and discharge.
SEE OR SEARCH THIS CLASS, SUBCLASS:
238 for pressure regulation of a structure which includes
both inlet and outlet airways.
255 for pressure regulation of a structure which includes an
inlet airway.
340 for pressure regulation of a structure which includes an
outlet airway.
SEE OR SEARCH CLASS:
34, Drying and Gas or Vapor Contact With Solids, subclass 92,
287, 402, and 558 for processes and apparatus for maintaining
pressure and/or vacuum peculiar to that class and subclass
242 for chamber seals there provided for.
128, Surgery, subclass 205.26 for pressure chambers for
therapeutic treatment, including hyperbaric and decompression
chambers.
137, Fluid Handling, subclasses 494+, particularly subclasses
505+, for regulating valves of general utility.
165, Heat Exchange, subclasses 234+ for pressure control of
a heated and/or cooled aircraft cabin where specific heating
or cooling means are included.
244, Aeronautics, subclass 59 for aircraft cabin pressure
control combined with aircraft engine supercharging or with
specific aircraft structure.
405, Hydraulic and Earth Engineering, subclasses 8+ and 11+
for caissons.
417, Pumps, for pumps and pump regulators responsive to pump
effect including such devices where the enclosure is defined
by name and no specific relationship between the enclosure
and the pump or fan is claimed.
418, Rotary Expansible Chamber Devices, for rotary expansible
chamber devices, per se.
Subclass:
71
Ventilation of aircraft cabin:
This subclass is indented under subclass 70. Subject matter
wherein the ventilated area is the interior, or compartment
thereof, of an aircraft.
SEE OR SEARCH CLASS:
165, Heat Exchange, subclasses 234+ for pressure control of
a heated and/or cooled aircraft cabin where specific heating
or cooling means are included.
Subclass:
72
Auxiliary control system:
This subclass is indented under subclass 71. Subject matter
wherein a secondary control system is utilized in the event
of failure of the primary control system.
(1) Note. Included in this subclass are auxiliary pressure
relief systems.
Subclass:
73
Mechanical operation of control system (e.g., by bellows or
diaphragm, etc.):
This subclass is indented under subclass 71. Subject matter
wherein the operation of the control system, including the
responsive means, is by primarily mechanical devices (e.g.,
bellows, diaphragm, piston, valve, etc.).
Subclass:
74
Control system having electrical or electronic component:
This subclass is indented under subclass 71. Subject matter
including an electrical or electronic component which is
essential to the operation, or activation thereof, of the
automatic control system.
Subclass:
75
Having automatic control means:
This subclass is indented under subclass 69. Subject matter
comprising (1) means to sense a condition or change of a
condition and (2) means responsive to the sensing means to
effect a change in flow of the air.
(1) Note. The condition or change of condition may be
related to air temperature or moisture content, for example.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 70+ for automatic pressure regulation of a
vehicle ventilating system.
229 for automatic control of a forced recirculation
ventilating system.
238 for automatic pressure regulation of a ventilating
system having both inlet and outlet airways.
239 for automatic control of a ventilating system having
both inlet and outlet airways.
255 for automatic pressure regulation of a ventilating
system having an inlet airway.
256 for automatic control of a ventilating system having an
inlet airway.
340 for automatic pressure regulation of a ventilating
system having an outlet airway.
SEE OR SEARCH CLASS:
236, Automatic Temperature and Humidity Regulation, for such
systems, per se.
Subclass:
76
Aircraft:
This subclass is indented under subclass 69. Subject matter
wherein the transporting device is particularly adapted to
atmospheric flight.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 71+ for automatic pressure regulation of an
aircraft cabin.
Subclass:
77
Freight:
This subclass is indented under subclass 76. Subject matter
wherein the ventilated space is particularly adapted for
transporting goods, equipment, or livestock.
SEE OR SEARCH THIS CLASS, SUBCLASS:
79 for ventilated cargo holds on-board a ship.
88 for ventilation of a freight-carrying railcar or
trailer.
118 for ventilation of other freight-carrying vehicles.
SEE OR SEARCH CLASS:
217, Wooden Receptacles, subclass 42 for ventilated crates
and subclass 74 for ventilated barrels, per se.
220, Receptacles, subclass 1.5 for freight containers, per
se.
Subclass:
78
Waterborne:
This subclass is indented under subclass 69. Subject matter
wherein the transporting device is particularly adapted to
navigation on or in a body of water.
SEE OR SEARCH CLASS:
114, Ships, subclasses 211+ for ventilating devices
specific to ships and involving the structure of the ship.
Subclass:
79
Freight:
This subclass is indented under subclass 78. Subject matter
wherein the ventilated space is particularly adapted for
transporting goods, equipment, or livestock.
SEE OR SEARCH THIS CLASS, SUBCLASS:
77 for ventilated aircraft cargo cabins.
88 for ventilation of a freight-carrying railcar or
trailer.
118 for ventilation of other freight-carrying vehicles.
SEE OR SEARCH CLASS:
217, Wooden Receptacles, subclass 42 for ventilated crates
and subclass 74 for ventilated barrels, per se.
220, Receptacles, subclass 1.5 for freight containers, per
se.
Subclass:
80
Nonperishable bulk foodstuff (e.g., grain ship):
This subclass is indented under subclass 79. Subject matter
wherein the ventilated space is particularly adapted for
transporting grain or other unpackaged and unrefrigerated
foodstuffs.
Subclass:
81
Porthole ventilator:
This subclass is indented under subclass 78. Subject matter
wherein the ventilating means is, or is used in conjunction
with, an embrasure in the side of a vessel.
Subclass:
82
With moisture deflector or drain:
This subclass is indented under subclass 78. Subject matter
comprising means to divert, channel, or convey liquid away
from the air admitting, exhausting, or circulating means.
(1) Note. Means to dehumidify the air is not included in
this subclass.
SEE OR SEARCH THIS CLASS, SUBCLASS:
146 for an exterior cowl ventilator with a moisture
deflector or drain.
subclasses 156+ for means to dehumidify air admitted to a
ventilated space in a vehicle.
Subclass:
83
Railcar, bus, or trailer:
This subclass is indented under subclass 69. Subject matter
wherein the transporting device is particularly adapted to
(1) run on a rail, (2) carry a large number of people, or (3)
be drawn by a propelling vehicle.
(1) Note. Subject matter relating to a mobile home which is
essentially stationary is not included in this and indented
subclasses. However, subject matter relating to a
self-propelled or towed recreational vehicle which is
essentially mobile is included in this subclass.
Subclass:
84
Locomotive cab:
This subclass is indented under subclass 83. Subject matter
wherein the transporting device is particularly adapted for
self-propulsion on a rail and wherein the ventilated space is
a compartment for a driver of the device.
Subclass:
85
Condensation preventer (e.g., defroster, etc.):
This subclass is indented under subclass 84. Subject matter
comprising means for preventing water, in either solid or
liquid form, which has been removed from the air, from
accumulating on a surface.
(1) Note. The condensate is usually prevented from
accumulating on a window.
SEE OR SEARCH THIS CLASS, SUBCLASS:
93 for a condensation preventer specific to a railcar, bus,
or trailer, in general, and not restricted to a locomotive
cab.
121 for a condensation preventer specific to a vehicle, in
general.
198 for a condensation preventer for a window in a static
structure, (e.g., building).
Subclass:
86
Including dust guard for cab window opening:
This subclass is indented under subclass 83. Subject matter
comprising means for deflecting cinders, grit, or other
particles from an air and light admitting aperture in a
barrier of the driver compartment (i.e., a cab window).
SEE OR SEARCH THIS CLASS, SUBCLASS:
96 for dust guards for windows in railcars, buses, and
trailers, generally, and not specific to locomotive cabs.
SEE OR SEARCH CLASS:
280, Land Vehicles, subclasses 847+ for devices for
protecting the occupants of a vehicle or the vehicle itself
from dust and mud incident to the use of that vehicle.
Subclass:
87
Sleeping car:
This subclass is indented under subclass 83. Subject matter
wherein the transporting device is particularly adapted to
ride on a rail and wherein the ventilated space comprises
sleeping accommodations for human passengers.
Subclass:
88
Freight:
This subclass is indented under subclass 83. Subject matter
wherein the ventilated space is particularly adapted for
transporting goods, equipment, or livestock.
SEE OR SEARCH THIS CLASS, SUBCLASS:
77 for ventilated aircraft cargo cabins.
79 for ventilated cargo holds on-board a ship.
118 for ventilation of other freight-carrying vehicles.
SEE OR SEARCH CLASS:
217, Wooden Receptacles, subclass 42 for ventilated crates
and subclass 74 for ventilated barrels, per se.
220, Receptacles, subclass 1.5 for freight containers, per
se.
Subclass:
89
Ice-bunker closure (e.g., for refrigerated railcar):
This subclass is indented under subclass 88. Subject matter
comprising a selectively movable or removable cover for a
hatch of an ice-carrying bin in the transporting device,
which closing includes means for admitting air.
(1) Note. Ice is usually placed through the hatch and into
the bin to cool a space in the transporting device.
Subclass:
90
Refrigerated or heated:
This subclass is indented under subclass 88. Subject matter
wherein the ventilated space is cooled below or warmed above
ambient temperature.
(1) Note. See the "Search Class" notes in the class
definition for a discussion of the lines between this class
and the various heating and refrigerating classes.
SEE OR SEARCH THIS CLASS, SUBCLASS:
91 for an ice-bunker closure.
Subclass:
91
With air pump:
This subclass is indented under subclass 90. Subject matter
comprising an apparatus for adding energy to and moving the
air.
(1) Note. The air moving apparatus is usually a fan.
Subclass:
92
With air pump:
This subclass is indented under subclass 88. Subject matter
comprising an apparatus for adding energy to and moving the
air.
(1) Note. The air moving apparatus is usually a fan.
Subclass:
93
Condensation preventer (e.g., defroster, etc.):
This subclass is indented under subclass 84. Subject matter
comprising means for preventing water, in either solid or
liquid form, which has been removed from the air, from
accumulating on a surface.
(1) Note. The condensate is usually prevented from
accumulating on a window.
SEE OR SEARCH THIS CLASS, SUBCLASS:
85 for a condensation preventer specific to a locomotive
cab.
121 for a condensation preventer specific to a vehicle, in
general.
198 for a condensation preventer for a window in a static
structure.
Subclass:
94
Having exterior cap closure for vent:
This subclass is indented under subclass 83. Subject matter
comprising an outside aperture which leads to the ventilated
space and further comprising a structure which swings,
slides, rotates, or otherwise moves between a first position
permitting airflow through the aperture and a second position
covering the aperture and preventing airflow therethrough.
(1) Note. Pivoting and sliding roof vents are included in
this subclass.
(2) Note. A damper door placed within an air passage
connecting the ventilated space with atmosphere is not
included in this subclass.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 4+ for a cap closure for a chimney or stacktop.
129 for a vehicle sunroof.
275 for an inlet airway having a specific cover or shield
for an exterior vent opening.
subclasses 347+ for an outlet airway having an air pump and
which may include a readily moveable cover.
355 for an outlet airway having an air pump and including a
moveable access cover.
356 for an outlet airway having an air pump and including an
exterior neck with an enlarged, weather resistant cover.
subclasses 358+ for other outlet airways which may include
a readily moveable cover.
subclasses 367+ for other outlet airways with a specific
cover or shield for an exterior vent opening.
Subclass:
95
Having window or entry-door ventilation structure:
This subclass is indented under subclass 83. Subject matter
comprising means to admit air to, exhaust air from, or
circulate air about the ventilated space combined with (1) a
light admitting structure in a barrier of the ventilated
space (i.e., window) or (2) a structure which swings, slides,
rotates, or otherwise moves between two positions, one
closing a passenger entrance to the ventilated space and the
other allowing such entrance (i.e., door).
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 128+ for window ventilation in other types of
vehicles.
195 for ventilation combined with a door in a static
structure (e.g., building).
subclasses 196+ for ventilation combined with a window in a
static structure (e.g., building).
Subclass:
96
Including dust guard for window opening:
This subclass is indented under subclass 95. Subject matter
comprising means for deflecting dust, cinders, or other
material from an air and light admitting aperture (i.e., a
window opening) in a barrier of the ventilated space.
SEE OR SEARCH THIS CLASS, SUBCLASS:
86 for dust guards for locomotive cab windows.
96 for dust guards for windows in railcars, buses, and
trailers, generally, and not specific to locomotive cabs.
SEE OR SEARCH CLASS:
280, Land Vehicles, subclasses 847+ for devices for
protecting the occupants of a vehicle or the vehicle itself
from dust and mud incident to the use of that vehicle.
Subclass:
97
Inside of window:
This subclass is indented under subclass 96. Subject matter
wherein the deflecting means is positioned on the ventilated
space side of the air and light admitting aperture.
Subclass:
98
Outside of window:
This subclass is indented under subclass 96. Subject matter
wherein the deflecting means is positioned outside the
ventilated space.
Subclass:
99
Having forced recirculation:
This subclass is indented under subclass 83. Subject matter
comprising an air moving apparatus which contacts and
directly forces air from one location within the ventilated
space to another separate location within the space.
(1) Note. Recirculating flow must directly contact and be
driven by an air moving apparatus to be included in this and
indented subclasses. Subject matter wherein recirculating
flow is merely "induced" by a separate forced flow is not
included in this and indented subclasses.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 139+ for forced recirculation in other types of
vehicles.
205 for recirculation combined with window features.
subclasses 228+ for forced recirculation within a static
structure, (e.g., building).
Subclass:
100
Having forced recirculation means alone:
This subclass is indented under subclass 99. Subject matter
wherein the air moving apparatus contacts and directly moves
only existing air within the ventilated space.
(1) Note. Subject matter including means for also
introducing air from outside of the ventilated space into the
space is excluded from this subclass.
SEE OR SEARCH THIS CLASS, SUBCLASS:
140 for other types of vehicles having forced recirculation
of vehicle air alone.
subclasses 230+ for a static structure (e.g., building)
having forced recirculation of ventilating air alone.
Subclass:
101
Wind-operated fan:
This subclass is indented under subclass 100. Subject matter
comprising a device for adding energy to and moving the air,
which device is driven by moving air.
SEE OR SEARCH THIS CLASS, SUBCLASS:
15 for a wind-operated fan associated with chimney or
stacktop structure.
106 for other railcar, bus, or trailer wind-operated fans
associated with an inlet and outlet airway.
113 for other railcar, bus, or trailer wind-operated fans
associated with an inlet airway only.
117 for a railcar, bus, or trailer having a wind-operated
fan associated with an outlet airway.
240 for a wind-operated air pump associated with a building
having both an inlet and an outlet airway.
Subclass:
102
Wheel-axle operated fan:
This subclass is indented under subclass 100. Subject matter
comprising a device for adding energy to and moving the air,
which device is driven by a rotating shaft which supports a
wheel of the transporting device.
SEE OR SEARCH THIS CLASS, SUBCLASS:
106 for a railcar, bus, or trailer having both an inlet and
an outlet airway and including wheel-axle operated fans.
114 for a railcar, bus, or trailer having a wheel-axle
operated fan associated with an inlet airway.
117 for a railcar, bus, or trailer having a wheel-axle
operated fan associated with an outlet airway.
Subclass:
103
Having both inlet and outlet airways:
This subclass is indented under subclass 83. Subject matter
comprising a means for admitting air to the ventilated space
and a separate means for exhausting air from the space.
(1) Note. The air admitting and exhausting means must be
separate and distinct from one another. A single means which
admits air to the space under one condition and exhausts air
from the space under another condition is not included in
this and indented subclasses.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 8+ for a chimney or stack having both inlet and
outlet airways.
subclasses 100+ for an apparatus for positively moving air
present in a ventilated space in a transporting device from
one position to another within the space without adding fresh
air (i.e., recirculation alone).
subclasses 103+ for a railcar, bus, or trailer having both
inlet and outlet airways.
subclasses 141+ for other vehicles having both inlet and
outlet airways.
subclasses 237+ for static structures (e.g., buildings)
having both inlet and outlet airways.
Subclass:
104
Including unitary inlet and outlet housing:
This subclass is indented under subclass 103. Subject matter
comprising a single structure containing portions of the air
admitting and air exhausting means.
(1) Note. This subclass is intended to include subject
matter in which the air admitting and air exhausting means
are integral.
SEE OR SEARCH THIS CLASS, SUBCLASS:
142 for other vehicles which have a unitary inlet and outlet
housing.
subclasses 234+ for static structures having forced
recirculation and which use a unitary inlet and outlet
housing.
subclasses 241+ for static structures (e.g., buildings)
which have a unitary inlet and outlet housing.
Subclass:
105
With air pump:
This subclass is indented under subclass 103. Subject matter
comprising an apparatus for adding energy to and moving the
air.
(1) Note. The air moving apparatus is often a fan.
SEE OR SEARCH THIS CLASS, SUBCLASS:
249 for a static structure (e.g., building) including both
inlet and outlet airways and an air pump.
Subclass:
106
Wind or wheel-axle operated:
This subclass is indented under subclass 105. Subject matter
wherein the air moving apparatus is driven by moving air or
by a rotating shaft which supports a wheel of the
transporting device.
SEE OR SEARCH THIS CLASS, SUBCLASS:
15 for a wind-operated fan associated with chimney or
stacktop structure.
101 for a wind-operated fan in a railcar, bus, or trailer
used for forced recirculation.
102 for a wheel-axle operated fan in a railcar, bus, or
trailer used in a forced recirculation system.
113 for a railcar, bus, or trailer wind-operated fan
associated with an inlet airway.
114 for a railcar, bus, or trailer having a wheel-axle
operated fan associated with an inlet airway.
117 for a railcar, bus, or trailer having a wind-operated
fan or a wheel-axle operated fan associated with an outlet
airway.
240 for a wind-operated air pump associated with a building
having both an inlet and an outlet airway.
Subclass:
107
Having inlet airway:
This subclass is indented under subclass 83. Subject matter
comprising means for admitting air to the ventilated space.
(1) Note. Subject matter disclosing an airway which can
function either as an inlet or an outlet is classified in
this and indented subclasses.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 10+ for chimneys or stacks having inlet
airways.
subclasses 143+ for other vehicles having inlet airways.
subclasses 254+ for static structures (e.g., buildings)
having inlet airways.
Subclass:
108
Including specific air distributor:
This subclass is indented under subclass 107. Subject matter
comprising particular means for directing the air as it
enters the ventilated space.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 152+ for other types of vehicles having specific
air distributors.
subclasses 185+ for hollow partitions which may disclose
specific air distributors.
subclasses 284+ for static structures having specific air
distributors.
Subclass:
109
Having adjustable deflector:
This subclass is indented under subclass 108. Subject matter
wherein the aperture structure comprises an air guiding means
readily moveable to different positions to direct the air
along different paths into the ventilated space.
SEE OR SEARCH THIS CLASS, SUBCLASS:
155 for a specific distributor having an adjustable
deflector used in other types of vehicles.
Subclass:
110
Liquid contact:
This subclass is indented under subclass 107. Subject matter
comprising means for the air to be directly exposed to water
or another liquid.
(1) Note. Liquid contact is usually for air humidification,
cooling, or purification.
(2) Note. Dehumidifying means are not included under this
subclass definition.
SEE OR SEARCH THIS CLASS, SUBCLASS:
157 for other vehicles in which the inlet air is exposed to
a liquid.
223 for a window ventilator having an air passage between
the sill and the bottom of the sash in which the air is
exposed to a liquid.
291 for a floor-type register in a building where the inlet
air is exposed to a liquid.
328 for other types of registers in a building where the
inlet air is exposed to a liquid.
337 for inlet airways for static structures, in general,
(e.g., buildings) where the inlet air is exposed to a
liquid.
SEE OR SEARCH CLASS:
126, Stoves and Furnaces, subclass 313 for air moistening
attachments for stovepipes and subclass 508 for a fireplace
with a room humidifier.
159, Concentrating Evaporators, subclass 5 for concentrating
evaporators designed to evaporate a liquid in film or thin
layer form.
237, Heating Systems, subclasses 78+ for air moistening
devices used in heating systems.
239, Fluid Sprinkling, Spraying, and Diffusing, for slow
diffusers.
261, Gas and Liquid Contact Apparatus, appropriate subclasses
for air moistening devices, per se, and subclasses 127+ for
heating and cooling devices combined with moisteners for the
air. Devices including significant ventilating structure and
excluding specific heating or cooling structure will be found
in this Class 454.
312, Supports: Cabinet Structure, subclasses 31+ for gas or
vapor treatment of material contained within a cabinet
structure.
Subclass:
111
With deflecting separator-type filter:
This subclass is indented under subclass 107. Subject matter
comprising means for separating particles from the air by use
of properties of momentum.
Subclass:
112
With air pump:
This subclass is indented under subclass 107. Subject matter
comprising an apparatus for adding energy to and moving the
air.
(1) Note. The air moving apparatus is usually a fan.
Subclass:
113
Wind operated:
This subclass is indented under subclass 112. Subject matter
wherein the air moving apparatus is driven by moving air.
SEE OR SEARCH THIS CLASS, SUBCLASS:
15 for a wind-operated fan associated with chimney or
stacktop structure.
101 for a wind-operated fan in a railcar, bus, or trailer
used for forced recirculation.
106 for other railcar, bus, or trailer wind-operated fans
associated with an inlet and outlet airway.
240 for a wind-operated air pump associated with a building
having both an inlet and an outlet airway.
Subclass:
114
Wheel-axle operated:
This subclass is indented under subclass 112. Subject matter
wherein the air moving apparatus is driven by a rotating
shaft which supports a wheel of the transporting device.
SEE OR SEARCH THIS CLASS, SUBCLASS:
102 for a wheel-axle operated fan in a railcar, bus, or
trailer used in a forced recirculation system.
106 for a railcar, bus, or trailer having both an inlet and
an outlet airway and including wheel-axle operated fans.
117 for a railcar, bus, or trailer having a wheel-axle
operated fan associated with an outlet airway.
Subclass:
115
Having outlet airway:
This subclass is indented under subclass 83. Subject matter
comprising means for exhausting air from the ventilated
space.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 162+ for other types of vehicles having an
outlet airway.
subclasses 339+ for static structures (e.g., buildings)
having an outlet airway.
Subclass:
116
With current inducing jet:
This subclass is indented under subclass 115. Subject matter
comprising a nozzle which ejects a high velocity flow stream
to draw the exhausting air from the ventilated space.
(1) Note. The high velocity flow stream is usually diverted
natural air current (i.e., wind) resulting from movement of
the vehicle.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 22+ for a chimney or stacktop which uses a
diverted natural air current to induce flow in the outlet
airway.
subclasses 39+ for other chimney or stacktop structures
which use current inducing jets to induce flow in the outlet
airway.
163 for other vehicles which use a current inducing jet
(often wind caused by the movement of the vehicle) to induce
flow in the outlet airway.
Subclass:
117
With air pump (e.g., wind or wheel-axle operated, etc.):
This subclass is indented under subclass 115. Subject matter
comprising an apparatus for adding energy to and moving the
air.
(1) Note. The air moving apparatus is usually a fan which
may be driven by various means such as moving air or a
rotating shaft which supports a wheel of the transporting
device.
SEE OR SEARCH THIS CLASS, SUBCLASS:
15 for a wind-operated fan associated with chimney or
stacktop structure.
101 for a wind-operated fan in a railcar, bus, or trailer
used in a forced recirculation system.
102 for a wheel-axle operated fan in a railcar, bus, or
trailer used in a forced recirculation system.
106 for a railcar, bus, or trailer having both an inlet and
an outlet airway and including wheel-axle operated fans.
113 for a railcar, bus, or trailer wind-operated fan
associated with an inlet airway.
114 for a railcar, bus, or trailer having a wheel-axle
operated fan associated with an inlet airway.
Subclass:
118
Freight:
This subclass is indented under subclass 69. Subject matter
wherein the ventilated space is particularly adapted for
transporting goods, equipment, or livestock.
(1) Note. This subclass includes a means to admit air to,
exhaust air from, or circulate air about a space in a
nonspecific freight transport container.
SEE OR SEARCH THIS CLASS, SUBCLASS:
77 for ventilated aircraft cargo cabins.
79 for ventilated cargo holds on-board a ship.
88 for ventilation of a freight-carrying railcar or
trailer.
SEE OR SEARCH CLASS:
217, Wooden Receptacles, subclass 42 for ventilated crates
and subclass 74 for ventilated barrels, per se.
220, Receptacles, subclass 1.5 for freight containers, per
se.
Subclass:
119
Having external connection:
This subclass is indented under subclass 69. Subject matter
comprising a means separate and distinct from the
transporting device which attaches to the device to admit air
to, exhaust air from, or circulate air about the ventilated
space.
(1) Note. The external connection is usually used when the
vehicle is stationary or parked for an extended period of
time.
Subclass:
120
Seat structure:
This subclass is indented under subclass 69. Subject matter
wherein an occupant seating means contains particular
structure for admitting air to, exhausting air from, or
circulating air about the ventilated space.
SEE OR SEARCH THIS CLASS, SUBCLASS:
907 for a cross-reference art collection of ventilating
devices combined with seats.
SEE OR SEARCH CLASS:
297, Chairs and Seats, subclass 180.1 for means to transfer
heat primarily to or from the seat or means to subject the
seat to fume smoke or the like.
Subclass:
121
Condensation preventer (e.g., defroster, etc.):
This subclass is indented under subclass 84. Subject matter
comprising means for preventing water, in either solid or
liquid form, which has been removed from the air, from
accumulating on a surface.
(1) Note. The condensate is usually prevented from
accumulating on a window.
SEE OR SEARCH THIS CLASS, SUBCLASS:
85 for a condensation preventer specific to a locomotive
cab.
93 for a condensation preventer specific to a railcar, bus,
or trailer, in general, and not restricted to a locomotive
cab.
198 for a condensation preventer for a window in a static
structure, (e.g., building).
Subclass:
122
Air directed between double paned window:
This subclass is indented under subclass 121. Subject matter
comprising two adjacent and parallel light admitting panels
which together form a light admitting structure and wherein
air is guided intermediate the two panels to prevent
congealed material from accumulating on the panels.
Subclass:
123
Air directed at window exterior:
This subclass is indented under subclass 121. Subject matter
comprising a light admitting structure and wherein the air is
guided at an outside surface of the structure to prevent
congealed material from accumulating thereon.
Subclass:
124
Side or rear window:
This subclass is indented under subclass 121. Subject matter
wherein the congealed material is prevented from accumulating
on a light admitting structure in a barrier of the ventilated
space which light admitting structure is predominantly
parallel to or facing away from a direction of forward
movement of the transporting device.
Subclass:
125
Having sweeping air distributor:
This subclass is indented under subclass 121. Subject matter
comprising means for guiding air along a regularly changing
directional path.
(1) Note. A continually oscillating or rotating air
distributor is included in this subclass.
SEE OR SEARCH THIS CLASS, SUBCLASS:
153 for a sweeping-type ventilating air distributor in a
vehicle.
285 for a sweeping-type ventilating air distributor in a
static structure (e.g., building).
Subclass:
126
Having means for combining heated and unheated air:
This subclass is indented under subclass 121. Subject matter
comprising means for mixing separate warmed and unwarmed air
portions together prior to admittance of the portions to the
ventilated space.
SEE OR SEARCH THIS CLASS, SUBCLASS:
160 for a vehicle heating system which combines heated and
unheated air.
SEE OR SEARCH CLASS:
237, Heating Systems, appropriate subclasses for a means for
ventilating a space in combination with specific heating
structure.
Subclass:
127
Having dashboard air distributor (e.g., for windshield,
etc.):
This subclass is indented under subclass 121. Subject matter
comprising an aperture means in the ventilated space which is
in or supported directly by a panel immediately below a
forward facing, light admitting, and wind protecting
structure of the transporting device, which aperture directs
air into the ventilated space.
(1) Note. The air is usually directed at the wind protecting
structure to prevent congealed material from accumulating
thereupon.
SEE OR SEARCH CLASS:
296, Land Vehicles: Bodies and Tops, subclass 84.1 for
vehicle windshields.
Subclass:
128
Means for open window (e.g., deflector, etc.):
This subclass is indented under subclass 69. Subject matter
comprising a light admitting structure in a barrier of the
ventilated space (i.e., a window) and further comprising air
guiding or directing means adapted for use with the light
admitting structure when the structure is in an open position
allowing free passage of air therethrough to or from the
ventilated space.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 95+ for window or entry-door ventilation in a
railcar, bus, or trailer.
SEE OR SEARCH CLASS:
296, Land Vehicles: Bodies and Tops, subclass 152 for
vehicle windows which include an accessory (e.g., visor,
shield, etc.) with no ventilation features. If particular
structure is present on the closure or in or about the
opening to cause air to flow into or out of the ventilated
space, the subject matter is proper for this class (454).
Subclass:
129
Sunroof:
This subclass is indented under subclass 128. Subject matter
wherein the open window is in a top surface bounding the
ventilated space.
SEE OR SEARCH THIS CLASS, SUBCLASS:
94 for a railcar, bus, or trailer roof vent closure.
SEE OR SEARCH CLASS:
296, Land Vehicles: Bodies and Tops, subclass 180.1 for fins
or air deflectors associated with the roof of a land vehicle
to affect the movement of a slip stream of air over the
vehicle and subclasses 210+ for a roof for a vehicle body
having an opening in said roof and a closure for said opening
in said roof which, when in the open position, permits free
communication of light or air between the interior of the
body and the atmosphere, but having no particular structure,
either on the closure or in or about the opening, to cause
air to flow into or out of the body. However, see subclass
217, in particular, for roof structure having air deflectors
actively associated with the closure, so that upon movement
of the closure toward an open position, the deflector is
caused to move from a retracted position to a position in
which it is operative to act upon the vehicle's slipstream.
If particular structure is present on the closure or in or
about the opening to cause air to flow into or out of the
ventilated space, the subject matter is proper for Class
454.
Subclass:
130
Windshield or rear window:
This subclass is indented under subclass 128. Subject matter
wherein the open window faces forward or rearward of the
direction of travel of the transporting device.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 146+ for an air admitting aperture in a vehicle
cowl.
150 for an air admitting aperture adjacent to a windshield.
151 for an air admitting aperture in an exterior side or
rear side of a vehicle.
Subclass:
131
At upper edge of sliding window:
This subclass is indented under subclass 128. Subject matter
wherein the window opens by gliding along its surface and
wherein the air guiding or directing means is positioned at a
top portion of the structure's perimeter.
(1) Note. This subclass does not include an air guiding or
directing means which is at an upper edge of a vertically
sliding window only when the window is in its fully retracted
position.
Subclass:
132
Having means to selectively adjust airflow:
This subclass is indented under subclass 131. Subject matter
comprising means which may be moved as desired to different
positions to vary the direction or amount of air passing
through the air guiding or directing means.
(1) Note. A device wherein airflow is adjusted by mere
opening or closing of the window is not included in this
subclass.
Subclass:
133
Having plural air passages:
This subclass is indented under subclass 131. Subject matter
wherein the air guiding or directing means includes two or
more physically separate air paths.
Subclass:
134
Pivoted window:
This subclass is indented under subclass 128. Subject matter
wherein the air guiding or directing means is adapted for use
with a window which opens by rotation about a fixed axis.
(1) Note. Deflectors for pivoted vent windows are included
in this subclass.
Subclass:
135
Adjacent front edge of window:
This subclass is indented under subclass 128. Subject matter
wherein the air guiding or directing means is positioned next
to a forward portion of the perimeter of the window.
SEE OR SEARCH THIS CLASS, SUBCLASS:
134 for a pivoted window having a ventilating means or
deflector adjacent its front edge.
Subclass:
136
Roof structure:
This subclass is indented under subclass 69. Subject matter
comprising air guiding or directing means integral with a
barrier above the ventilated space of the transporting device
(i.e., roof).
SEE OR SEARCH THIS CLASS, SUBCLASS:
94 for a railcar, bus, or trailer roof vent closure.
subclasses 130+ for air admitting, exhausting, or
circulating means used with a windshield which opens.
subclasses 146+ for an air admitting aperture in a vehicle
cowl.
150 for an air admitting aperture adjacent to a windshield.
151 for an air admitting aperture in an exterior side or
rear side of a vehicle.
Subclass:
137
Including duct extending along roof:
This subclass is indented under subclass 136. Subject matter
comprising an air carrying conduit stretching within or
immediately adjacent the roof.
Subclass:
138
Having exterior inlet opening over windshield:
This subclass is indented under subclass 137. Subject matter
wherein the conduit comprises an aperture means above and
generally adjacent a forward facing light admitting and wind
protecting structure (i.e., windshield), the aperture means
admitting air to the conduit from atmosphere.
Subclass:
139
Having Forced Recirculation:
This subclass is indented under subclass 69. Subject matter
comprising an air moving apparatus which contacts and
directly forces air from one location within the ventilated
space to another separate location within the space.
(1) Note. Recirculating flow must directly contact and be
driven by an air moving apparatus to be included in this and
indented subclasses. Subject matter wherein recirculating
flow is merely "induced" by a separate forced flow is not
included in this and indented subclasses.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 99+ for forced recirculation within a railcar,
bus, or trailer type of vehicle.
205 for recirculation combined with window features.
subclasses 228+ for forced recirculation within a static
structure, (e.g., building).
Subclass:
140
Forced recirculation alone or agitating fan:
This subclass is indented under subclass 139. Subject matter
wherein the air moving apparatus contacts and directly moves
only existing air within the ventilated space.
(1) Note. Subject matter including means for also
introducing air from outside of the ventilated space into the
space is excluded from this subclass.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 100+ for a railcar, bus, or trailer having
forced recirculation of vehicle air alone.
subclasses 230+ for a static structure (e.g., building)
having forced recirculation of ventilating air alone.
Subclass:
141
Having both inlet and outlet airways:
This subclass is indented under subclass 69. Subject matter
comprising a means for admitting air to the ventilated space
and a separate means for exhausting air from the space.
(1) Note. The air admitting and exhausting means must be
separate and distinct from one another. A single means which
admits air to the space under one condition and exhausts air
from the space under another condition is not included in
this and indented subclasses.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 8+ for a chimney or stack having both inlet and
outlet airways.
subclasses 100+ for an apparatus for positively moving air
present in a ventilated space in a transporting device from
one position to another within the space without adding fresh
air (i.e., recirculation alone).
subclasses 103+ for railcars, buses, or trailers having
both inlet and outlet airways.
145 for a means combined with a closure which acts
alternatively to admit air to and exhaust air from a
ventilated space.
subclasses 237+ for static structures (e.g., buildings)
having both inlet and outlet airways.
Subclass:
142
Including unitary inlet and outlet housing:
This subclass is indented under subclass 141. Subject matter
comprising a single structure containing portions of the air
admitting and air exhausting means.
(1) Note. This subclass is intended to include subject
matter in which the air admitting and air exhausting means
are integral.
SEE OR SEARCH THIS CLASS, SUBCLASS:
104 for railcars, buses, or trailers which have a unitary
inlet and outlet housing.
subclasses 234+ for static structures having forced
recirculation and which use a unitary inlet and outlet
housing.
subclasses 241+ for static structures (e.g., buildings)
which have a unitary inlet and outlet housing.
Subclass:
143
Having inlet airway:
This subclass is indented under subclass 69. Subject matter
comprising means for admitting air to the ventilated space.
(1) Note. Subject matter disclosing an airway which can
function either as an inlet or an outlet is classified in
this and indented subclasses.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 10+ for chimneys or stacks having an inlet
airway.
107 for railcars, buses, or trailers having inlet airways.
subclasses 254+ for static structures (e.g., buildings)
having inlet airways.
Subclass:
144
Including duct extending along floor:
This subclass is indented under subclass 143. Subject matter
comprising an air carrying conduit stretching parallel to and
within or adjacent a lower, supporting surface of the
ventilated space (i.e., floor).
(1) Note. An air carrying conduit which merely passes
perpendicularly through the supporting surface is not
included in this subclass.
Subclass:
145
Selective inlet, outlet, and closure:
This subclass is indented under subclass 143. Subject matter
comprising means which can be positioned at will to admit air
to the ventilated space, to exhaust air from the ventilated
space, or to prevent airflow to and from the ventilated
space.
Subclass:
146
Including exterior cowl inlet:
This subclass is indented under subclass 143. Subject matter
comprising an aperture through which air is admitted from
atmosphere to the ventilated space, which aperture is on a
top or outer side portion of the vehicle transporting device
forward of a forward facing, light passing, and wind
protecting structure (i.e., windshield).
(1) Note. The top or outer side portion of the vehicle
transporting device forward of the windshield is commonly
called a cowl.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 130+ for air admitting, exhausting, or
circulating means used with a windshield which opens.
subclasses 136+ for an air admitting aperture incorporated
in vehicle roof structure.
150 for an air admitting aperture adjacent to a windshield.
151 for an air admitting aperture in an exterior side or
rear side of a vehicle.
Subclass:
147
With moisture deflector or drain:
This subclass is indented under subclass 146. Subject matter
comprising means to divert, channel, or convey liquid away
from the air admitting means.
(1) Note. Means to dehumidify the air is not included in
this subclass.
SEE OR SEARCH THIS CLASS, SUBCLASS:
156 for means to dehumidify vehicle inlet air.
Subclass:
148
Ducting to heat exchanger:
This subclass is indented under subclass 146. Subject matter
comprising means for directing air from the aperture to a
nonspecific heat transferring structure for warming or
cooling the air prior to admittance of the air to the
ventilated space.
(1) Note. See the class definition for what constitutes a
nonspecific heat transferring structure such as is
appropriate for this class. Recitation of an "air
conditioning unit" or a "heater" does not exclude a patent
from this class.
SEE OR SEARCH CLASS:
62, Refrigeration, various subclasses for a means for
ventilating a space in combination with specific cooling or
refrigerating structure.
237, Heating Systems, various subclasses for a means for
ventilating a space in combination with specific heating
structure.
Subclass:
149
Having exterior door:
This subclass is indented under subclass 146. Subject matter
comprising a structure exposed to atmosphere which swings,
slides, rotates, or otherwise moves between two positions,
one exposing the (cowl) aperture to atmosphere to admit air
therethrough and a second covering the aperture to prevent
admittance of air therethrough.
Subclass:
150
Including exterior windshield inlet:
This subclass is indented under subclass 143. Subject matter
comprising an aperture exposed to atmosphere through which
the air is admitted to the ventilated space, which aperture
is adjacent a forward facing, light passing, and wind
protecting structure (i.e., windshield) of the transporting
device.
(1) Note. The aperture is usually above or below and in the
plane of the windshield.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 130+ for air admitting, exhausting, or
circulating means used with a windshield which opens.
subclasses 136+ for an air admitting aperture incorporated
in vehicle roof structure.
subclasses 146+ for an air admitting aperture in a vehicle
cowl.
151 for an air admitting aperture in an exterior side or
rear side of a vehicle.
Subclass:
151
Including exterior rear or rear side inlet:
This subclass is indented under subclass 143. Subject matter
comprising an aperture through which the air is admitted from
atmosphere to the ventilated space, which aperture is (1) in
a rearwardly facing outer boundary portion of the
transporting device or (2) in an outer boundary portion of
the transporting device facing horizontally and transverse to
a direction of forward movement of the device and which
portion lies rearward of a light admitting, wind protecting
structure (i.e., windshield).
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 130+ for air admitting, exhausting, or
circulating means used with a windshield which opens.
subclasses 136+ for an air admitting aperture incorporated
in vehicle roof structure.
subclasses 146+ for an air admitting aperture in a vehicle
cowl (forward of windshield).
150 for an air admitting aperture adjacent to a windshield.
Subclass:
152
Including specific air distributor:
This subclass is indented under subclass 143. Subject matter
comprising particular means for directing the air as it
enters the ventilated space.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 108+ for railcars, buses, or trailers having
specific air distributors.
subclasses 185+ for hollow partitions which may disclose
specific air distributors.
subclasses 284+ for static structures having specific air
distributors.
Subclass:
153
Sweeping type:
This subclass is indented under subclass 152. Subject matter
comprising means for guiding the air along a regularly
changing directional path.
SEE OR SEARCH THIS CLASS, SUBCLASS:
125 for a sweeping-type vehicle window defroster.
285 for a sweeping-type ventilating air distributor in a
static structure (e.g., building).
Subclass:
154
Having swiveling nozzle:
This subclass is indented under subclass 152. Subject matter
comprising an air-enveloping passage which rotates to
different positions to direct air along different paths into
the ventilated space.
(1) Note. Dashboard ball or spherical outlets are included
in this subclass.
SEE OR SEARCH THIS CLASS, SUBCLASS:
286 for a building air distributor having an airway joint
with ball or cylinder rotatable in a socket.
Subclass:
155
Having adjustable deflector:
This subclass is indented under subclass 152. Subject matter
comprising an air guiding means readily moveable to different
positions to direct the air along different paths into the
ventilated space.
(1) Note. Damper means which distribute inlet air between
two or more aperture structures are not included in this
subclass.
SEE OR SEARCH THIS CLASS, SUBCLASS:
109 for a specific distributor having an adjustable
deflector used in a railcar, bus, or trailer.
143 for a damper means which distributes inlet air between
two or more aperture containing structures.
Subclass:
156
With air treatment means:
This subclass is indented under subclass 143. Subject matter
comprising means to change a naturally occurring state of the
air.
(1) Note. A device which removes dust or grit from inlet air
is included in this subclass.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 201+ for window ventilation having means for
lowering the temperature of the air combined with filtering
means.
207 for a filtering means combined with window ventilation.
SEE OR SEARCH CLASS:
96, Gas Separation: Apparatus, appropriate subclasses for
means for removing dust and other contaminants from air, per
se.
Subclass:
157
Liquid contact:
This subclass is indented under subclass 156. Subject matter
comprising means for the air to be directly exposed to water
or another liquid.
(1) Note. Liquid contact is usually for air humidification,
cooling, or purification.
(2) Note. Dehumidifying means are not included under this
subclass definition.
SEE OR SEARCH THIS CLASS, SUBCLASS:
110 for a railcar, bus, or trailer in which the inlet air is
exposed to a liquid.
223 for a window ventilator having an air passage between
the sill and the bottom of the sash in which the air is
exposed to a liquid.
291 for a floor-type register in a building where the inlet
air is exposed to a liquid.
328 for other types of registers in a building where the
inlet air is exposed to a liquid.
337 for inlet airways for static structures, in general,
(e.g., buildings) where the inlet air is exposed to a
liquid.
SEE OR SEARCH CLASS:
126, Stoves and Furnaces, subclass 313 for air moistening
attachments for stovepipes and subclass 508 for a fireplace
with a room humidifier.
159, Concentrating Evaporators, subclass 5 for concentrating
evaporators designed to evaporate a liquid in film or thin
layer form.
237, Heating Systems, subclasses 78+ for air moistening
devices used in heating systems.
239, Fluid Sprinkling, Spraying, and Diffusing, for slow
diffusers.
261, Gas and Liquid Contact Apparatus, appropriate subclasses
for air moistening devices, per se, and subclasses 127+ for
heating and cooling devices combined with moisteners for the
air. Devices including significant ventilating structure and
excluding specific heating or cooling structure will be found
in this Class 454.
312, Supports: Cabinet Structure, subclasses 31+ for gas or
vapor treatment of material contained within a cabinet
structure.
Subclass:
158
Porous filter:
This subclass is indented under subclass 156. Subject matter
comprising a means containing a multitude of orifices which
permit the passage therethrough of air but which resist the
passage therethrough of solids or other impurities.
Subclass:
159
Heating:
This subclass is indented under subclass 156. Subject matter
comprising nonspecific means for warming the air.
(1) Note. See the class definition for what constitutes a
nonspecific means for warming the air such as is appropriate
for this class. Recitation of an "air conditioning unit" or a
"heater" does not exclude a patent from this class.
SEE OR SEARCH CLASS:
62, Refrigeration, appropriate subclasses for a means for
ventilating a space in combination with specific cooling or
refrigerating structure.
237, Heating Systems, appropriate subclasses for a means for
ventilating a space in combination with specific heating
structure.
Subclass:
160
Having means for combining heated and unheated air:
This subclass is indented under subclass 159. Subject matter
comprising means for mixing separate warmed and unwarmed air
portions together prior to admittance to the ventilated
space.
SEE OR SEARCH THIS CLASS, SUBCLASS:
125 for a vehicle window defroster which combines heated and
unheated air.
Subclass:
161
Having heat exchange core:
This subclass is indented under subclass 159. Subject matter
wherein the nonspecific unit for warming the air receives its
heat from a cooling liquid of a propulsion plant of the
transporting device.
SEE OR SEARCH CLASS:
165, Heat Exchange, subclass 59, 234+, and 248+, for the
combination of air distribution means with specific heat
exchange means adapted to heat or cool the air and subclass
60 for the combination of an air moistening device with a
specific heat exchange means adapted to heat or cool a
chamber.
Subclass:
162
Having outlet airway:
This subclass is indented under subclass 69. Subject matter
comprising means for exhausting air from the ventilated
space.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 115+ for a railcar, bus, or trailer having an
outlet airway.
subclasses 339+ for static structures (e.g., buildings)
having an outlet airway.
Subclass:
163
With current inducing jet:
This subclass is indented under subclass 162. Subject matter
comprising a nozzle which ejects a high velocity flow stream
to draw air from the ventilated space to atmosphere.
(1) Note. The high velocity flow stream is usually diverted
natural air current (i.e., wind) resulting from movement of
the vehicle.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 22+ for a chimney or stacktop which uses a
diverted natural air current to induce flow in the outlet
airway.
subclasses 39+ for other chimney or stacktop structures
which use current inducing jets to induce flow in the outlet
airway.
116 for a railcar, bus, or trailer which uses a current
inducing jet (often wind caused by the movement of the
vehicle) to induce flow in the outlet airway.
Subclass:
164
Exterior side outlet:
This subclass is indented under subclass 162. Subject matter
comprising an aperture through which the air is exhausted
from the outlet passage to atmosphere, which aperture is in
an outer boundary portion of the transporting device, which
boundary portion faces horizontally and transverse to a
direction of forward movement of the device.
(1) Note. An outlet through a vehicle side door or side
pillar (e.g., C-pillar, etc.) is included in this subclass.
(2) Note. The outer boundary portion through which the air
is exhausted usually forms a barrier of the ventilated
space.
Subclass:
165
Exterior rear outlet:
This subclass is indented under subclass 162. Subject matter
comprising an aperture through which the air is exhausted
from the outlet passage to atmosphere, which aperture is in a
rearwardly facing, outer boundary portion of the transporting
device.
(1) Note. An outlet through a rear deck of a vehicle is
included in this subclass.
Subclass:
166
VEHICULAR TUNNEL:
This subclass is indented under the class definition. Subject
matter wherein an enclosed passageway for a passenger
transporting, goods transporting, or equipment transporting
device is ventilated.
(1) Note. The enclosed passageway is often underground.
SEE OR SEARCH CLASS:
104, Railways, subclass 52 for smoke removers in roundhouses
and train sheds over locomotive smoke stacks which may be
provided with means for producing an artificial draft.
Subclass:
167
With air pump:
This subclass is indented under subclass 166. Subject matter
comprising an air moving apparatus for forcing fresh air to
or stale air from the enclosed passageway.
Subclass:
168
MINE:
This subclass is indented under the class definition. Subject
matter wherein an earth excavation for extracting ore or
minerals is ventilated.
Subclass:
169
With partition means (e.g., brattice, etc.):
This subclass is indented under subclass 168. Subject matter
comprising a barrier means for resisting flow of air from one
part of the earth excavation to another part of the
excavation.
(1) Note. This subclass includes brattice walls, mine safety
doors, etc.
(2) Note. A mere wall of a duct which carries air to, from,
or along an excavation or gallery is not included in this
subclass.
(3) Note. The partition means often acts as a safety device
for protection from fire or explosion or is erected to
deflect air toward a particular location in the excavation.
SEE OR SEARCH CLASS:
299, Mining or In Situ Disintegration of Hard Material,
subclass 12 for processes in which a step is included for
preventing injury to a human working in a mine or mining
operation.
Subclass:
170
Flexible sheet:
This subclass is indented under subclass 169. Subject matter
wherein the flow resisting means comprises a pliable fabric
or material.
(1) Note. The pliable fabric or material may be cloth,
canvas, a synthetic sheeting, etc.
Subclass:
171
Having inlet and outlet ductwork:
This subclass is indented under subclass 168. Subject matter
comprising conduit structure for admitting fresh ventilating
air to the ventilated space and for exhausting stale air from
the space.
(1) Note. The conduit structure (ductwork) must be distinct
from the walls defining the mine excavation or gallery.
Subclass:
172
Having inlet ductwork:
This subclass is indented under subclass 168. Subject matter
comprising conduit structure for admitting fresh ventilating
air to the ventilated space.
(1) Note. The conduit structure (ductwork) must be distinct
from the walls defining the mine excavation or gallery.
Subclass:
173
STORAGE AREA FOR PERISHABLES:
This subclass is indented under the class definition. Subject
matter comprising means to ventilate a space used for the
safekeeping of a good subject to decay or spoilage.
(1) Note. Perishables include grain, hay, ears of corn,
seeds, fruit, vegetables, etc.
SEE OR SEARCH CLASS:
34, Drying and Gas or Vapor Contact With Solids, subclasses
201+ for drying houses, kilns, or containers, particularly
subclasses 232+ for plural gas or vapor inlets and/or
outlets.
62, Refrigeration, appropriate subclasses for ventilated
rooms or chambers in combination with cooling or
refrigeration means specialized to refrigeration.
Subclass:
174
Harvested crop ventilation:
This subclass is indented under subclass 173. Subject matter
wherein the goods comprise a newly obtained product of the
soil.
Subclass:
175
Having perforated or slotted duct contacting crop:
This subclass is indented under subclass 174. Subject matter
comprising a conduit having a series of holes or elongated
openings therealong for admitting or exhausting air from the
ventilated space, the conduit being positioned so as to touch
the product of the soil associated with the ventilated
space.
(1) Note. The conduit is usually placed inside a pile made
up of the product of the soil.
Subclass:
176
Including insertion means:
This subclass is indented under subclass 175. Subject matter
comprising means to facilitate placement of the conduit into
the product of the soil.
(1) Note. The placement facilitating means usually comprises
a pointed conduit end which allows the conduit to be forced
inside a pile of the product of the soil.
SEE OR SEARCH CLASS:
239, Fluid Sprinkling, Spraying, and Diffusing, subclasses
271+ for apparatus including a sharpened or tapered element
supported on or connected to either (1) a terminal outlet
member or (2) a supply conduit means in order to adapt the
apparatus to be forced through a wall, object, or mass to
make the latter more accessible for spraying.
Subclass:
177
Horizontal and vertical perforated or slotted ducts:
This subclass is indented under subclass 175. Subject matter
comprising two or more such conduits having a series of holes
or elongated openings therealong for admitting fresh air into
the ventilated space, one of the conduits extending parallel
to and another perpendicular to the force of gravity.
(1) Note. A floor duct is considered to be horizontal and a
vertically extending wall duct is considered to be vertical.
Subclass:
178
With air pump:
This subclass is indented under subclass 177. Subject matter
comprising an air moving apparatus which forces the air into
or withdraws it from the ventilated space.
SEE OR SEARCH THIS CLASS, SUBCLASS:
180 for a horizontal perforated or slotted harvested crop
ventilating duct with an air pump.
181 for other perforated or slotted harvested crop
ventilating ducts with an air pump.
Subclass:
179
Horizontal duct:
This subclass is indented under subclass 175. Subject matter
wherein the conduit extends parallel to the force of
gravity.
(1) Note. A perforated, ventilating floor duct is included
in this subclass.
Subclass:
180
With air pump:
This subclass is indented under subclass 179. Subject matter
comprising an air moving apparatus which forces the air into
or withdraws it from the ventilated space.
SEE OR SEARCH THIS CLASS, SUBCLASS:
178 for horizontal and vertical perforated or slotted
harvested crop ventilating ducts with an air pump.
181 for other perforated or slotted harvested crop
ventilating ducts with an air pump.
Subclass:
181
With air pump:
This subclass is indented under subclass 175. Subject matter
comprising an air moving apparatus which forces the air into
or withdraws it from the ventilated space.
SEE OR SEARCH THIS CLASS, SUBCLASS:
178 for horizontal and vertical perforated or slotted
harvested crop ventilating ducts with an air pump.
180 for a horizontal perforated or slotted harvested crop
ventilating duct with an air pump.
Subclass:
182
Granular crop or corn ears:
This subclass is indented under subclass 174. Subject matter
wherein the product of the soil in the ventilated space
comprises a plurality of particle or pellet sized elements or
corn ears.
(1) Note. Granular crops include grain in the kernel, malt,
seeds, corn kernels, etc.
(2) Note. Potatoes and vegetables, in general, are not
considered to be granular crops.
SEE OR SEARCH THIS CLASS, SUBCLASS:
80 for a waterborne vehicle adapted to carrying a granular
crop.
subclasses 175+ for a perforated or slotted duct contacting
and ventilating a granular crop.
SEE OR SEARCH CLASS:
34, Drying and Gas or Vapor Contact With Solids, appropriate
subclasses, particularly subclass 174, 224, 225, and 232 for
means for directing air relative to means for handling or
supporting material.
52, Static Structures (e.g., Buildings) appropriate
subclasses, particularly 192+, 198+, 204.1+, 218, 219,
220.1+, and 302.1+ for an enclosure or building component
having no means for positively causing or directing air flow
other than a port, perforation, door or window.
Subclass:
183
Provision safe:
This subclass is indented under subclass 173. Subject matter
comprising means to ventilate a space used for safekeeping of
food or supplies ready for use or consumption.
SEE OR SEARCH CLASS:
34, Drying and Gas or Vapor Contact With Solids, subclass 72,
76, and 84 for apparatus for treating a gas or vapor that
contacts solids and includes forced circulation of the gas or
vapor.
187, Elevator, Industrial Lift Truck, or Stationary Lift for
Vehicle, subclasses 401+ for particular elevator load
support structure or arrangement.
312, Supports: Cabinet Structure, subclass 31.01 for
provision safes having liquid wetted means continuously
exposed to a chamber and to an unconfined gas and subclass
213 for provision safes having a perforated exterior wall.
Subclass:
184
ELECTRONIC CABINET:
This subclass is indented under the class definition. Subject
matter wherein the ventilated space is a nonspecific
repository with shelves, drawers, or compartments for the
safekeeping of electrical or electronic circuitry.
(1) Note. Ventilating systems for the interior of television
cabinets or personal computer cabinets are included.
(2) Note. This subclass is meant to include on the board
recitation of electric or electronic circuitry. Any details
of the electric or electronic circuitry are beyond the scope
of this class.
SEE OR SEARCH CLASS:
312, Supports: Cabinet Structure, subclass 7.1 for
radio-type cabinets, per se, and subclasses 8+ for phonograph
cabinets, per se. Cabinets in combination with apparatus such
as loud-speakers, dials, tuning handles or shafts, chassis,
etc., are classified with the apparatus.
455, Telecommunications, subclass 217 for means to protect a
receiver circuit or elements thereof from damage due to
outside electrical influences.
Subclass:
185
HOLLOW PARTITION:
This subclass is indented under the class definition. Subject
matter wherein a barrier of a structure (e.g., wall, floor,
roof, etc.) is made hollow for the passage of air to effect
ventilation of said structure.
(1) Note. Patents wherein the ventilating transfer means is
a duct or conduit within the partition are not to be placed
in this subclass.
SEE OR SEARCH CLASS:
52, Static Structures (e.g., Buildings) subclass 302.1 for
a mere vent communicating with the interior of a partition.
249, Static Molds, subclass 22 and 36+ for molds for forming
a partition having a ventilating shaft.
Subclass:
186
Having blower:
This subclass is indented under subclass 185. Subject matter
wherein the ventilating air movement is forced by means such
as a fan, air pump, etc.
Subclass:
187
CLEAN ROOM:
This subclass is indented under the class definition. Subject
matter comprising means specifically for conducting naturally
occurring, normally present particles away from a work
enclosure.
Subclass:
188
HAVING PROTECTING AIR CURRENT:
This subclass is indented under the class definition. Subject
matter comprising an air jet or air sheet forced across an
opening to a (ventilated) space to prevent entrance of dust,
flies, or other debris into the space.
SEE OR SEARCH THIS CLASS, SUBCLASS:
60 for a covered workbench chamber having an access opening
which acts as an air outlet from the chamber.
Subclass:
189
Surrounding protected area:
This subclass is indented under subclass 188. Subject matter
wherein the air current jet or sheet substantially bounds the
space being protected from dust, flies, or other debris.
(1) Note. An air jet or sheet which forms the boundary of
one half or more of a space being protected is included in
this subclass.
Subclass:
190
Including plural, layered currents:
This subclass is indented under subclass 188. Subject matter
comprising two or more distinct air jets or sheets which are
positioned one outside of the other relative to the space
being protected.
Subclass:
191
Including suction outlet:
This subclass is indented under subclass 188. Subject matter
comprising a passageway for attracting and exhausting the jet
or sheet of air after it has passed across the opening.
Subclass:
192
Including current adjusting means:
This subclass is indented under subclass 188. Subject matter
comprising means for varying the direction, rate of flow, or
character of the air jet or sheet.
Subclass:
193
Cabinet enclosure (e.g., display case, etc.):
This subclass is indented under subclass 188. Subject matter
wherein the ventilated space is a nonspecific repository with
shelves, drawers, or compartments for the safekeeping or
display of a collection of objects or materials.
(1) Note. A display case having a protecting air current is
included in this subclass.
Subclass:
194
BLAST OR SHOCK WAVE PREVENTION:
This subclass is indented under the class definition. Subject
matter comprising a means which senses a change in pressure
or air flow resulting from an explosion or a high intensity
air pressure disturbance and said means acting either to
allow or to obstruct air flow based upon such sensing.
(1) Note. The devices of this subclass are commonly used in
association with bomb shelters, or to allow venting of a
ventilated space based upon a severe atmospheric pressure
drop (e.g., tornados).
(2) Note. The means usually permits flow in one direction
along a conduit while blocking flow in an opposite
direction.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 3+ for a backdraft preventer incorporated in
chimneytop or stacktop structure, particularly subclass 26.
subclasses 70+ for condition responsive pressure
maintenance inside a vehicle which may include a valve.
227 for a backdraft preventer combined with a window.
238 for pressure regulation of a ventilation system which
includes both inlet and outlet airways.
255 for pressure regulation of a ventilation system which
includes an inlet airway.
259 for a backdraft preventer and an inlet airway.
340 for pressure regulation of a ventilation system which
includes an outlet airway.
353 for a backdraft preventer and fan for an outlet airway.
subclasses 359+ for a backdraft preventer for an outlet
airway.
Subclass:
195
MEANS COMBINED WITH DOOR:
This subclass is indented under the class definition. Subject
matter comprising means to admit air to, exhaust air from, or
circulate air about a (ventilated) space in combination with
a moveable structure which closes off an entranceway to the
space.
(1) Note. The entranceway must be for the passage of
something other than mere air, for example, a human or good.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 95+ for entry-door ventilation structure in a
railcar, bus, or trailer.
Subclass:
196
MEANS COMBINED WITH WINDOW:
This subclass is indented under the class definition. Subject
matter comprising means to admit air to, exhaust air from, or
circulate air about a (ventilated) space in combination with
a structure for admitting light into the space through a
barrier of the space.
(1) Note. For references to the lines between Class 454 and
other classes, see the search notes below.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 95+ for window ventilation structure in a
railcar, bus, or trailer
subclasses 128+ for window ventilation for other types of
vehicles.
SEE OR SEARCH CLASS:
49, Movable or Removable Closures, appropriate subclasses for
a mere through passage in a wall combined with a closure,
e.g., a window for the passage of air. See, in particular,
subclass 71 for distinct side wings movable with a closure.
Also see the class definition of Class 49, Lines with Other
Classes, for the lines between Class 49, Class 52, and this
class (454).
52, Static Structures (e.g., Buildings), appropriate
subclasses for static structures having windows therein. See
the Search Notes to the class definition of Class 52 for the
lines between Class 52 and this class (454).
160, Flexible or Portable Closure, Partition, or Panel,
appropriate subclasses for screens and other flexible and
portable panel type closures.
Subclass:
197
For bed or couch:
This subclass is indented under subclass 196. Subject matter
adapted for use with (1) a piece of furniture for reclining
or sleeping or (2) a person supported on such a piece of
furniture.
(1) Note. Typically, air is supplied to or removed from a
person's head by way of a window connection while the person
is lying on the piece of furniture.
SEE OR SEARCH CLASS:
5, Beds, subclass 10.1 for a bed modified to project partly
through a window or having some modification adapting them
for use in connection with or relation to a window,
subclasses 652.1+ for the ventilating of a cushion, and
subclasses 724+ for the ventilating of a mattress.
160, Closures, Partitions and Panels, Flexible and Portable,
appropriate subclasses, particularly subclasses 45+, for
outrigged flexible and portable panels without additional
means to control, direct, or cause ventilation.
Subclass:
198
Condensation preventer:
This subclass is indented under subclass 84. Subject matter
comprising means for preventing water, in either solid or
liquid form, which has been removed from the air, from
accumulating on a surface.
SEE OR SEARCH THIS CLASS, SUBCLASS:
85 for a condensation preventer specific to a locomotive
cab.
93 for a condensation preventer specific to a railcar, bus,
or trailer, in general, and not restricted to a locomotive
cab.
121 for a condensation preventer specific to a vehicle, in
general.
SEE OR SEARCH CLASS:
15, Brushing, Scrubbing, and General Cleaning, subclass
250.01 for window cleaning attachments combined with means
for applying air.
52, Static Structures (e.g., Buildings) subclass 171.3 for
residual transparent panel with treating means and see
notes.
Subclass:
199
Skylight:
This subclass is indented under subclass 196. Subject matter
wherein the structure for admitting light is located on a top
covering portion (i.e., roof) of the ventilated space.
(1) Note. See the Search Notes below for references to lines
between Class 454 and other classes.
(2) Note. Exterior vault or manhole covers are not included
in this subclass.
SEE OR SEARCH THIS CLASS, SUBCLASS:
48 for an exterior vault or manhole cover which may also
admit light.
SEE OR SEARCH CLASS:
49, Movable or Removable Closures, appropriate subclasses for
a mere through passage in a barrier combined with a closure
for the passage of air. And see Lines With Other Classes of
the Class 49 class definition for the line between Class 49
and Class 454.
52, Static Structures (e.g., Buildings), subclass 18, 80,
198+, and 200 for skylight-type fixtures. And see the Class
454 search notes in the Class definition of Class 52 for the
line between the two classes.
Subclass:
200
With air pump:
This subclass is indented under subclass 196. Subject matter
comprising an apparatus for adding energy to and moving the
air.
(1) Note. The air is usually moved from one side to an
opposite side of the window.
SEE OR SEARCH CLASS:
160, Flexible or Portable Closure, Partition, or Panel,
appropriate subclasses for flexible and portable window
panels.
415, Rotary Kinetic Fluid Motors or Pumps, appropriate
subclasses for a blower, per se.
416, Fluid Reaction Surfaces (i.e., Impellers), appropriate
subclasses for a fan, per se.
417, Pumps, appropriate subclasses for a motor driven blower,
per se.
Subclass:
201
Cooling air conditioner:
This subclass is indented under subclass 200. Subject matter
wherein the air moving apparatus comprises a nominal means
for lowering air temperature.
(1) Note. The mere naming of an air cooling air conditioner
in the claims will allow for a document to be placed in this
subclass; however, if the document claims any specific
details beyond a broad fan or housing of an air conditioner,
e.g., a condenser or an evaporator, it should be classified
elsewhere. See the Search Class notes below.
SEE OR SEARCH CLASS:
62, Refrigeration, particularly subclass 262 for a window
connected or mounted air conditioner, or subclasses 426+ for
a cooling air conditioner with gas forcing means wherein
specific details of the cooling air conditioner are claimed.
See the (1) Note above.
248, Supports, particularly subclasses 208+ for specially
mounted or attached window brackets.
312, Supports: Cabinet Structure, particularly subclass 236
for a specific air conditioner housing.
Subclass:
202
Having readily moveable flow control means:
This subclass is indented under subclass 201. Subject matter
comprising easily shiftable means for altering a direction or
rate of flow of the air.
Subclass:
203
With extensible side panel:
This subclass is indented under subclass 201. Subject matter
comprising a partition or screening element attached to the
apparatus and moved laterally to close or block a window
opening between a window frame member and the apparatus.
SEE OR SEARCH CLASS:
62, Refrigeration, subclass 262 for an air conditioner
(including specific details of the cooling means) mounting in
a window.
Subclass:
204
With mounting or support means:
This subclass is indented under subclass 201. Subject matter
comprising means for holding or uniting the air moving
apparatus to the window.
SEE OR SEARCH CLASS:
62, Refrigeration, subclass 262 for an air conditioner
(including specific details of the cooling means) mounting in
a window.
Subclass:
205
Recirculation means:
This subclass is indented under subclass 200. Subject matter
comprising means for circulating or moving a portion of air
from one position in the ventilated space to another position
within the space.
(1) Note. Subject matter comprising forced, "partial
recirculation", wherein fresh air and recirculating air
contact and are directly forced into the space by an air
moving apparatus are included in this and indented subclasses
unless otherwise indicated.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 99+ for forced recirculation in a railcar, bus,
or trailer-type vehicle.
subclasses 139+ for forced recirculation in other types of
vehicles.
subclasses 228+ for recirculation in a static structure
(e.g., building).
subclasses 261+ for inlet airways which induce
recirculatory air flow.
Subclass:
206
With specific noise inhibiting structure:
This subclass is indented under subclass 200. Subject matter
wherein particular significance is attributed to a
configuration which prevents or reduces unwanted sound.
(1) Note. See the Search Class notes below for references to
the line between Class 454 and other classes.
SEE OR SEARCH THIS CLASS, SUBCLASS:
262 for an inlet airway, including structure for mixing
plural airstreams together, which has specific noise
inhibiting structure.
346 for an outlet airway having vibration absorbing or
preventing structure.
906 for a cross-reference art collection of ventilating
structure combined with noise inhibiting means.
SEE OR SEARCH CLASS:
181, Acoustics, appropriate subclasses. Note particularly
subclasses 212+ for a fluid conducting-type sound muffler
of a general nature, and see subclass 212, (1) Note, for the
line between Class 181 and this class (454); and subclass 224
for a sound absorbing ventilating duct.
Subclass:
207
With specific filtering means:
This subclass is indented under subclass 200. Subject matter
wherein particular significance is attributed to a means for
removing solids or other impurities from the air.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 156+ particularly subclass 158 for porous
filters used to filter out solid particles in a vehicle inlet
airway.
subclasses 201+ for window ventilation having means for
lowering the temperature of the air combined with filtering
means.
SEE OR SEARCH CLASS:
96, Gas Separation: Apparatus, appropriate subclasses for
means for removing dust and other contaminants from air, per
se.
Subclass:
208
Propeller fan having rotary axis perpendicular to window:
This subclass is indented under subclass 200. Subject matter
comprising an air moving element which rotates about an axis
lying at right angles to a plane which generally defines the
window.
Subclass:
209
With mounting means for pump reversal:
This subclass is indented under subclass 208. Subject matter
comprising means for holding or uniting the air moving
apparatus to the window and wherein the holding means permits
selectively facing of the air moving apparatus in either of
two opposing directions.
(1) Note. The opposing directions are usually to allow the
fan to selectively introduce air to or exhaust air from the
ventilated space.
(2) Note. A mounting means which must be reversed with the
air pump to face the pump in an opposite direction is not
included in this subclass.
Subclass:
210
With extensible side panel:
This subclass is indented under subclass 208. Subject matter
comprising a partition or screening element attached to the
apparatus and moved laterally to close or block a window
opening between a window frame and the air pump.
Subclass:
211
Having air passage in sash:
This subclass is indented under subclass 196. Subject matter
comprising a frame which directly attaches to and holds a
light admitting panel (i.e., pane) of the window and wherein
the frame includes a path therethrough for the air.
(1) Note. A ventilation means which contains an air duct,
but which merely attaches to the frame, is not included in
this subclass unless the frame itself includes an air path
therethrough.
SEE OR SEARCH CLASS:
49, Movable or Removable Closures, subclass 171 for a
viewing, ventilating, or packet passage within a closure.
Subclass:
212
Having air passage means within, attaching to, or replacing
pane:
This subclass is indented under subclass 196. Subject matter
wherein the means (1) comprises an air passage through a
light admitting panel of the window, (2) connects directly to
a light admitting panel of the window, or (3) is substituted
in place of a light admitting panel of the window.
(1) Note. A window structure merely comprising light
admitting (e.g., glass, etc.) air guiding slats or louvers
between which air flows is not included in this subclass.
(2) Note. A mere window pane which opens by pivoting or
sliding is not included in this subclass.
(3) Note. The light admitting panel noted above must be a
part of the window proper and not merely a part of a
ventilating device attached thereto.
(4) Note. A frame which directly attaches to and holds a
light admitting panel of the window and which includes a path
therethrough for the air is not included in this subclass.
SEE OR SEARCH THIS CLASS, SUBCLASS:
196 for a means comprising a window pane which slides to an
open position within a stationary sash.
211 for a frame which directly attaches to and holds a light
admitting panel of the window and which includes an air
pathway therethrough.
224 for a window structure comprising light admitting air
guiding slats or louvers.
225 for a window pane which pivots to an open position in a
stationary sash.
Subclass:
213
Having air passage at window top:
This subclass is indented under subclass 196. Subject matter
wherein the means is located at an upper portion of the
window.
Subclass:
214
Having air passage between sill and bottom of sash:
This subclass is indented under subclass 196. Subject matter
comprising an air path located between a base of the window
(i.e., a sill) and a base of a frame which directly attaches
to and holds a lowermost light admitting panel of the window
(i.e., a sash).
(1) Note. A window frame which supports the sash is not
considered to be part of the sash.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 200+ for a window combined with an air pump
located at various positions including at the bottom of the
window between the window sash and window sill.
213 for a window having an air passage at a top portion of a
window and also between a window sill and a sash bottom.
SEE OR SEARCH CLASS:
49, Movable or Removable Closures, particularly subclasses
50+ for a safety guard insertable between a window sash and
a window sill.
160, Flexible or Portable Closure, Partition, or Panel,
appropriate subclasses for a screen inserted between the
window sash and window sill.
Subclass:
215
Including wall sloping downward from window:
This subclass is indented under subclass 214. Subject matter
comprising a shield or air guiding surface which (1) forms a
bounding side or wall of a path for the air and (2) extends
vertically downward and away from the window.
(1) Note. A downward sloping, outside awning is included in
this subclass.
(2) Note. The shield or air guiding surface may lie on the
ventilated space side of the window or on an opposite side of
the window.
(3) Note. A panel comprising parallel or concentric
ventilating slats or louvers is not considered to be a wall.
SEE OR SEARCH THIS CLASS, SUBCLASS:
224 for a panel comprising parallel or concentric air
guiding slats which slopes downward from the window.
SEE OR SEARCH CLASS:
52, Static Structures (e.g., Buildings), for rigid-type
awnings having no means other than vents or openings for
allowing flow of air.
160, Flexible or Portable Closure, Partition, or Panel,
particularly subclass 20, 22, and 45+ for outrigged
structures of flexible material or of plural strips, slats,
or panels interconnected for relative motion and for such
type structures combined with other flexible, portable, or
rigid panels or closures where there are no additional air
guiding or controlling features.
Subclass:
216
Including wall for upwardly deflecting inlet air:
This subclass is indented under subclass 214. Subject matter
comprising a shield or air guiding surface which (1) forms a
bounding side or wall of a path for the air and (2) directs
the air in a vertically upward direction into the ventilated
space.
(1) Note. The shield or guiding surface usually (1) lies
parallel to the window or (2) extends vertically and into the
ventilated space from the window.
(2) Note. A device also having a position sloping downward
from the window (e.g., an awning) is not included in this
subclass.
(3) Note. A panel comprising parallel or concentric air
guiding slats or louvers is not considered to be a wall.
SEE OR SEARCH THIS CLASS, SUBCLASS:
215 for a wall for upwardly deflecting inlet air which wall
is sloped or can be readily sloped downward from the window.
221 for a window having a panel comprising parallel or
concentric air guiding slats which upwardly deflects inlet
air.
307 for other inlet air ventilators having an air deflecting
wall extending into the room.
Subclass:
217
Having adjustable angle or swingable mounting:
This subclass is indented under subclass 216. Subject matter
comprising a supporting means for the air guiding surface
which (1) facilitates changing inclination of the guiding
surface relative to the window or (2) permits arcuate
movement of the guiding surface.
(1) Note. A device wherein the inclination is changeable so
as to slope downward from the window is not included in this
subclass.
SEE OR SEARCH THIS CLASS, SUBCLASS:
215 for an air guiding surface combined with a window which
surface is changeable so as to slope downward from the
window.
Subclass:
218
Including collapsible or flexible, perpendicular side wall:
This subclass is indented under subclass 217. Subject matter
comprising a partitioning surface at an end of the air
guiding surface which (1) has one edge which is connected to
the air guiding surface for movement therewith and an
opposite edge which is stationary and (2) lies generally at a
right angle to the air guiding surface.
(1) Note. The partitioning surface usually is constructed of
a flexible material or of plural, relatively moveable
strips.
(2) Note. The side wall usually prevents air from bypassing
the guiding surface and not being deflected upwardly.
Subclass:
219
Having readily moveable air regulating means:
This subclass is indented under subclass 217. Subject matter
comprising easily shiftable means to increase or decrease
flow of the air.
(1) Note. A shiftable internal body such as a damper is
included in this subclass.
(2) Note. Readily moveable air regulating means does not
include a mere sliding or pivoting window frame or sash.
SEE OR SEARCH THIS CLASS, SUBCLASS:
217 for an air passage between a window sill and sash bottom
including an adjustable angle wall for upwardly deflecting
inlet air.
Subclass:
220
Having slidably interconnected sections:
This subclass is indented under subclass 216. Subject matter
comprising at least two air guiding surface portions attached
together which slip or glide relative to one another.
(1) Note. The slipping or gliding motion is usually for
adjustment of the surface to suit window size.
SEE OR SEARCH CLASS:
160, Flexible or Portable Closure, Partition, or Panel,
subclass 223 for such devices made of two or more slidably
interconnected sections, wherein each of the slats is
composed of sliding or telescoping sections, the device
having no additional means for directing or controlling air;
subclasses 90+, particularly subclass 104, for such devices
combined with flexible or portable panels, but having no
means in addition to such combination for directing or
controlling the air; subclasses 222+ for plural strip, slat,
or panel devices slidably interconnected; and subclasses 375+
for single frames having movable side bar sections.
Subclass:
221
Including louvers:
This subclass is indented under subclass 214. Subject matter
comprising generally parallel or concentric air guiding slats
which lie in the air path.
SEE OR SEARCH THIS CLASS, SUBCLASS:
224 for other window ventilators including louvers.
264 for an inlet airway including structure for mixing
plural air streams together which has a shaped nozzle and
includes louvers.
subclasses 265+ for other inlet airways including structure
for mixing plural air streams together and which include
louvers.
subclasses 277+ for a wall-type inlet airway including a
specific cover or shield for the exterior vent opening and
includes louvers.
288 for a baseboard-type inlet airway which may include
louvers.
290 for a floor-type inlet airway which may include
louvers.
subclasses 299+ for a ceiling-type inlet airway which may
include louvers.
subclasses 309+ for a wall-type inlet airway which includes
a louvered air distributor.
subclasses 325+ for an inlet airway including a specific
air distributor and additionally a louver which forms an
adjustable valve.
subclasses 335+ for an inlet airway without a specific air
distributor which includes a louver which forms an adjustable
valve.
subclasses 347+ for an outlet airway including an air pump
which may have air regulating louvers.
subclasses 358+ for other outlet airways which may have air
regulating louvers.
SEE OR SEARCH CLASS:
52, Static Structures (e.g., Buildings), particularly
subclass 473 for a louvered panel and subclass 633 for
location of related structures in other classes.
160, Flexible or Portable Closure, Partition, or Panel,
subclasses 140+ for louver devices in which the slats are
flexible, or are interconnected to each other for relative
movement, or may be accumulated (e.g., venetian blinds). See
the Class 160 class definition.
Subclass:
222
Including readily moveable air regulating means:
This subclass is indented under subclass 214. Subject matter
comprising easily shiftable means to increase or decrease
flow of the air.
(1) Note. A shiftable internal body such as a damper is
included in this subclass.
(2) Note. Readily moveable air regulating means does not
include a mere sliding or pivoting window frame or sash.
SEE OR SEARCH THIS CLASS, SUBCLASS:
217 for an air passage between a window sill and sash bottom
including an adjustable angle wall for upwardly deflecting
inlet air.
219 for an air passage between a window sill and sash bottom
including a wall for upwardly deflecting inlet air and a
readily moveable air regulating means.
221 for a device comprising parallel or concentric air
guiding slats which pivot.
Subclass:
223
With means for liquid contact:
This subclass is indented under subclass 214. Subject matter
comprising means for directly exposing the air to a liquid.
SEE OR SEARCH THIS CLASS, SUBCLASS:
110 for a railcar, bus, or trailer in which the inlet air is
exposed to a liquid.
157 for other vehicles in which the inlet air is exposed to
a liquid.
291 for a floor-type register in a building where the inlet
air is exposed to a liquid.
328 for other types of registers in a building where the
inlet air is exposed to a liquid.
337 for inlet airways for static structures, in general
(e.g., buildings), where the inlet air is exposed to a
liquid.
SEE OR SEARCH CLASS:
126, Stoves and Furnaces, subclass 313 for air moistening
attachments for stovepipes and subclass 508 for a fireplace
with a room humidifier.
159, Concentrating Evaporators, subclass 5 for concentrating
evaporators designed to evaporate a liquid in film or thin
layer form.
237, Heating Systems, subclasses 78+ for air moistening
devices used in heating systems.
239, Fluid Sprinkling, Spraying, and Diffusing, for slow
diffusers.
261, Gas and Liquid Contact Apparatus, appropriate subclasses
for air moistening devices, per se, and subclasses 127+ for
heating and cooling devices combined with moisteners for the
air. Devices including significant ventilating structure and
excluding specific heating or cooling structure will be found
in this Class 454.
312, Supports: Cabinet Structure, subclasses 31+ for gas or
vapor treatment of material contained within a cabinet
structure.
Subclass:
224
Having louvers:
This subclass is indented under subclass 196. Subject matter
wherein the means comprises generally parallel or concentric
air guiding slats.
(1) Note. The air guiding slats may be composed of an opaque
or light admitting (i.e., louvered window panes) material.
SEE OR SEARCH THIS CLASS, SUBCLASS:
221 for a window ventilator having an air passage between
the sill and the bottom of the sash which includes louvers.
264 for an inlet airway including structure for mixing
plural air streams together which has a shaped nozzle and
includes louvers.
subclasses 265+ for other inlet airways including structure
for mixing plural air streams together and which include
louvers.
subclasses 277+ for a wall-type inlet airway including a
specific cover or shield for the exterior vent opening and
includes louvers.
288 for a baseboard-type inlet airway which may include
louvers.
290 for a floor-type inlet airway which may include
louvers.
subclasses 299+ for a ceiling-type inlet airway which may
include louvers.
subclasses 309+ for a wall-type inlet airway which includes
a louvered air distributor.
subclasses 325+ for an inlet airway including a specific
air distributor and additionally a louver which forms an
adjustable valve.
subclasses 335+ for an inlet airway without a specific air
distributor which includes a louver which forms an adjustable
valve.
subclasses 347+ for an outlet airway including an air pump
which may have air regulating louvers.
subclasses 358+ for other outlet airways which may have air
regulating louvers.
SEE OR SEARCH CLASS:
49, Movable or Removable Closures, particularly subclass 74.1
for movable louvered windows which have adjacent edges which
contact each other (i.e., are not constantly spaced apart) in
the closed position to effect a closure between them.
52, Static Structures (e.g., Building), particularly subclass
473 for a louvered panel and subclass 633 for location of
related structures in other classes.
160, Flexible or Portable Closure, Partition, or Panel,
subclasses 140+ for louver devices in which the slats are
flexible, or are interconnected to each other for relative
movement, or may be accumulated (e.g., venetian blinds). See
class definition, part C, of Class 160.
Subclass:
225
Tilting pane window:
This subclass is indented under subclass 196. Subject matter
wherein the window comprises a light admitting panel which
rotates about a horizontal axis.
SEE OR SEARCH THIS CLASS, SUBCLASS:
217 for an air passage between a window sill and sash bottom
having a wall for upwardly deflecting inlet air, the wall
being adjustable for angle or having a swingable mounting.
221 for an air passage between a window sill and sash bottom
which includes light admitting parallel or concentric slats
which rotate about a horizontal axis.
224 for a window in combination with light admitting
parallel or concentric ventilating slats which rotate about a
horizontal axis.
Subclass:
226
Having wind deflector:
This subclass is indented under subclass 196. Subject matter
comprising a shield or air guiding surface which extends into
a flow of natural air (i.e., wind) to direct the air through
the window into the ventilated space or to draw air out of
the ventilated space.
(1) Note. A mere shield which shelters a window from the
wind, but allows air to pass through the window into or out
of the ventilated space, is not included in this subclass.
SEE OR SEARCH THIS CLASS, SUBCLASS:
215 for an air passage between a window sill and sash
including a wall sloping downward from the window which may
deflect air into or out of the window.
Subclass:
227
Including backdraft preventer:
This subclass is indented under subclass 196. Subject matter
comprising a means which senses pressure or direction of air
flow to or from a ventilated space and which acts to allow
airflow under certain sensed conditions and to obstruct
airflow under other sensed conditions.
(1) Note. The means usually permits flow in one direction
along a conduit while blocking flow in an opposite
direction.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 3+ for a backdraft preventer incorporated in
chimneytop or stacktop structure, particularly subclass 26.
subclasses 70+ for condition responsive pressure
maintenance inside a vehicle which may include a valve.
194 for a blast or shock wave type of backdraft preventer.
238 for pressure regulation of a ventilation system which
includes both inlet and outlet airways.
255 for pressure regulation of a ventilation system which
includes an inlet airway.
259 for a backdraft preventer and an inlet airway.
340 for pressure regulation of a ventilation system which
includes an outlet airway.
353 for a backdraft preventer and fan for an outlet airway.
subclasses 359+ for a backdraft preventer for an outlet
airway.
Subclass:
228
HAVING FORCED RECIRCULATION:
This subclass is indented under the class definition. Subject
matter comprising an air moving apparatus which contacts and
directly forces air from one location within a (ventilated)
space to another separate location within the space.
(1) Note. This subclass includes a multi-compartmented
structure such as a multiple room house provided the air flow
path is recirculatory and not merely a flow-through
ventilation path.
(2) Note. Subject matter comprising forced, "partial
recirculation", wherein fresh air and recirculating air
contact and are directly forced into the space by an air
moving apparatus are included in this and indented subclasses
unless otherwise indicated.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 99+ for forced recirculation in a railcar, bus,
or trailer-type vehicle.
subclasses 139+ for forced recirculation in other types of
vehicles.
205 for recirculation combined with window features.
subclasses 261+ for inlet airways which induce
recirculatory air flow.
Subclass:
229
Including automatic control means:
This subclass is indented under subclass 228. Subject matter
comprising a means to sense a condition or change of
condition which condition or change of condition may or may
not occur, which means is effective to activate a separate
means for regulating the quantity or direction of air flowing
to, from, or about the ventilated space.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 70+ for automatic pressure regulation of a
vehicle ventilating system.
75 for automatic control of a vehicle ventilating system.
238 for automatic pressure regulation of a ventilating
system having both inlet and outlet airways.
239 for automatic control of a ventilating system having
both inlet and outlet airways.
255 for automatic pressure regulation of a ventilating
system having an inlet airway.
256 for automatic control of a ventilating system having an
inlet airway.
340 for automatic pressure regulation of a ventilating
system having an outlet airway.
SEE OR SEARCH CLASS:
236, Automatic Temperature and Humidity Regulation,
appropriate subclasses for automatic control means for
controlling temperature or humidity.
Subclass:
230
Forced recirculation alone:
This subclass is indented under subclass 228. Subject matter
wherein the air moving apparatus contacts and directly moves
only existing air within the ventilated space.
(1) Note. Subject matter including means for also
introducing air from outside of the ventilated space into the
space is excluded from this and indented subclasses.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 100+ for a railcar, bus, or trailer having
forced recirculation of vehicle air alone.
140 for other types of vehicles having forced recirculation
of vehicle air alone.
Subclass:
231
Having recirculating duct connecting upper and lower room air
strata:
This subclass is indented under subclass 230. Subject matter
comprising a conduit which guides air between separate
horizontal air layers within a ventilated chamber.
(1) Note. The air in the different layers usually differs in
some characteristic such as temperature.
(2) Note. The conduit must connect different strata within
the same chamber or room to be included in this subclass
(i.e., a duct connecting two different chambers on different
floors of a building is not included in this subclass).
SEE OR SEARCH THIS CLASS, SUBCLASS:
187 for a clean room having a recirculating duct connecting
upper and lower room air strata.
Subclass:
232
Having plural or branched recirculation ducts:
This subclass is indented under subclass 230. Subject matter
comprising two or more conduits for separately guiding air
between locations within the ventilated space.
(1) Note. A single conduit comprising plural sections
connected in series is not included in this subclass.
Subclass:
233
For use with heating or cooling means:
This subclass is indented under subclass 230. Subject matter
wherein the apparatus for moving the existing air is combined
with a nominally recited means for raising or lowering air
temperature in the ventilated space.
(1) Note. The mere naming of a furnace, heat exchanger, or
air conditioner in the claims will allow for a document to be
placed in this subclass. However, if the document claims a
specific furnace, heat exchanger, or air conditioner, it
should be classified elsewhere.
SEE OR SEARCH THIS CLASS, SUBCLASS:
236 for other forced recirculation systems combined with a
nominally recited heating or cooling means.
SEE OR SEARCH CLASS:
62, Refrigeration, appropriate subclasses for specific
cooling or refrigeration means in a ventilating system.
165, Heat Exchange, appropriate subclasses for specific
heating and cooling means in a ventilating system.
237, Heating Systems, particularly subclass 48 and 53 for
specific furnace means in a ventilating system and the Search
Class notes of the class definition and subclass 46 for the
line between Class 237 and Class 454.
Subclass:
234
Including unitary housing having both inlet and outlet
airways:
This subclass is indented under subclass 228. Subject matter
comprising a single structure containing means for admitting
air to a ventilated space and a separate means for exhausting
air from the space.
(1) Note. A means for solely guiding air which is to be
returned to the ventilated space (i.e., recirculating air
alone) is not considered to be an inlet or outlet.
(2) Note. The air admitting and exhausting means must
comprise separate and distinct passages. A single passage
which admits air to the space under one condition and
exhausts air from the space under another condition is not
included in this subclass.
(3) Note. This and indented subclasses are intended to
include subject matter in which the separate air admitting
and air exhausting means are contained within or form a
single, integral structure.
SEE OR SEARCH THIS CLASS, SUBCLASS:
104 for a railcar, bus, or trailer having a unitary inlet
and outlet housing which does not recirculate air.
142 for other types of vehicles having a unitary inlet and
outlet housing which does not recirculate air.
subclasses 241+ for a static structure (e.g., building)
having a unitary inlet and outlet housing which does not
recirculate air.
Subclass:
235
Having air pump means for both airways:
This subclass is indented under subclass 234. Subject matter
comprising an air moving means which directly contacts air to
force it into the ventilated space and an air moving means
which directly contacts air to force it out of the space.
(1) Note. While most subject matter in this subclass
comprises a means for contacting and forcing the air into the
ventilated space and a separate means for contacting and
forcing air out of the space, subject matter comprising a
single means which performs both functions is also included
herein.
SEE OR SEARCH THIS CLASS, SUBCLASS:
244 for similar devices where there is no forced
recirculation.
252 for ventilation systems having air pump means for
separate inlet and outlet airways.
Subclass:
236
For use with heating or cooling means:
This subclass is indented under subclass 228. Subject matter
wherein the apparatus for moving the existing air is combined
with a nominally recited means for raising or lowering air
temperature in the ventilated space.
(1) Note. The mere naming of a furnace, heat exchanger, or
air conditioner in the claims will allow for a document to be
placed in this subclass. However, if the document claims a
specific furnace, heat exchanger, or air conditioner, it
should be classified elsewhere.
SEE OR SEARCH THIS CLASS, SUBCLASS:
233 for a means having forced recirculation alone combined
with a nominally recited heating or cooling means.
SEE OR SEARCH CLASS:
62, Refrigeration, appropriate subclasses for specific
cooling or refrigeration means in a ventilating system.
165, Heat Exchange, appropriate subclasses for specific
heating and cooling means in a ventilating system.
237, Heating Systems, particularly subclass 48 and 53 for
specific furnace means in a ventilating system and the Search
Class notes of the class definition and subclass 46 for the
line between Class 237 and Class 454.
Subclass:
237
HAVING BOTH INLET AND OUTLET AIRWAYS:
This subclass is indented under the class definition. Subject
matter comprising a means for admitting air to a (ventilated)
space and a separate means for exhausting air from the
space.
(1) Note. The air admitting and exhausting means must be
separate and distinct from one another. A single means which
admits air to the space under one condition and exhausts air
from the space under another condition is not included in
this subclass.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 8+ for a chimney or stack having both inlet and
outlet airways.
subclasses 103+ for railcars, buses, or trailers having
both inlet and outlet airways.
subclasses 141+ for other vehicles having both inlet and
outlet airways.
subclasses 254+ for a means which acts alternatively to
admit air to or release air from a ventilated space.
Subclass:
238
Pressure regulation:
This subclass is indented under subclass 237. Apparatus
including means responsive to air conditions either in or
outside of an enclosure or the air condition in the supply
system for the enclosure to maintain a predetermined pressure
in said enclosure and/or a difference in pressure between
said enclosure and the outside atmosphere.
(1) Note. Systems which maintain enclosures under air
pressure but having no air condition responsive automatic
controls are in other appropriate subclasses of this class,
e.g., those having differential air input and discharge.
SEE OR SEARCH THIS CLASS, SUBCLASS:
70 for pressure regulation with a vehicle and note the
classes referred to under "SEARCH CLASS" for that subclass.
255 for pressure regulation of a structure which includes an
inlet airway.
340 for pressure regulation of a structure which includes an
outlet airway.
Subclass:
239
Including automatic control means:
This subclass is indented under subclass 237. Subject matter
comprising a means to sense a condition or change of
condition which condition or change of condition may or may
not occur, which means is effective to activate a separate
means for regulating the quantity or direction of air flowing
to or from the ventilated space.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 70+ for automatic pressure regulation of a
vehicle ventilating system.
75 for automatic control of a vehicle ventilating system.
229 for automatic control of a forced recirculation
ventilating system.
238 for automatic pressure regulation of a ventilating
system having both inlet and outlet airways.
255 for automatic pressure regulation of a ventilating
system having an inlet airway.
256 for automatic control of a ventilating system having an
inlet airway.
340 for automatic pressure regulation of a ventilating
system having an outlet airway.
SEE OR SEARCH CLASS:
236, Automatic Temperature and Humidity Regulation,
appropriate subclasses for automatic control means for
controlling temperature or humidity.
Subclass:
240
With wind-operated air pump:
This subclass is indented under subclass 237. Subject matter
comprising an air moving apparatus powered by natural air
current for forcing air to or from the ventilated space.
SEE OR SEARCH THIS CLASS, SUBCLASS:
15 for a wind-operated fan associated with chimney or
stacktop structure.
101 for a wind-operated fan in a railcar, bus, or trailer
used for forced recirculation.
106 for other railcar, bus, or trailer wind-operated fans
associated with an inlet and outlet airway.
113 for other railcar, bus, or trailer wind-operated fans
associated with an inlet airway.
Subclass:
241
Including unitary inlet and outlet housing:
This subclass is indented under subclass 237. Subject matter
comprising a single structure containing portions of the air
admitting and air exhausting means.
(1) Note. This and indented subclasses are intended to
include subject matter in which the air admitting and air
exhausting means are integral.
SEE OR SEARCH THIS CLASS, SUBCLASS:
104 for railcars, buses, or trailers which have a unitary
inlet and outlet housing.
142 for other vehicles which have a unitary inlet and outlet
housing.
subclasses 234+ for static structures having forced
recirculation and which use a unitary inlet and outlet
housing.
Subclass:
242
Rooftop:
This subclass is indented under subclass 241. Subject matter
wherein the single structure is located on or in an outdoor
exposed, top barrier of the ventilated space.
(1) Note. A conduit which passes through the roof to conduct
air to and from an area immediately below the roof is proper
for this subclass.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 1+ for specific chimney or stack structure
wherein air communicates with an area substantially below the
roof proper.
Subclass:
243
Sleeved vent for ceiling, wall, or floor (i.e., thimble):
This subclass is indented under subclass 241. Subject matter
wherein the single structure comprises a casing which acts
alone and is inserted in an interior top, side, or bottom
structural barrier of the (ventilated) space to guide air
separately and in opposite directions between adjacent,
unconfined locations on opposite sides of the barrier.
(1) Note. An air distributing register with return vent
which works in conjunction with a duct is not included in
this subclass. The adjacent air on opposite sides of the
barrier must be unconfined by ducting or like structures.
(2) Note. A bank-vault ventilator thimble is included in
this subclass.
Subclass:
244
With air pump means for both inlet and outlet airways:
This subclass is indented under subclass 243. Subject matter
comprising an air moving means which directly contacts air to
force it into the ventilated space and an air moving means
which directly contacts air to force it out of the space.
(1) Note. While most subject matter in this subclass
comprises a means for contacting and forcing the air into the
ventilated space and a separate means for contacting and
forcing air out of the space, subject matter comprising a
single means which performs both functions is also included
herein.
SEE OR SEARCH THIS CLASS, SUBCLASS:
235 for subject matter having forced recirculation and both
inlet and outlet airways, and further having air pump means
for both of the airways, which airways are contained in a
unitary housing.
252 for ventilation systems having air pump means for
separate inlet and outlet airways.
Subclass:
245
Air distributor with return vent (e.g., register, etc.):
This subclass is indented under subclass 241. Subject matter
wherein the single structure comprises a means for directing
the airflow as it enters the ventilated space and an aperture
for exhausting air from the space.
Subclass:
246
Baseboard type:
This subclass is indented under subclass 245. Subject matter
wherein the single structure is located at the juncture of an
interior, side structural barrier (i.e., wall) and an
interior, bottom structural barrier (i.e., floor) of the
ventilated space.
Subclass:
247
Floor type:
This subclass is indented under subclass 245. Subject matter
wherein the single structure is located on or in an interior,
bottom structural barrier of the ventilated space.
Subclass:
248
Ceiling type:
This subclass is indented under subclass 245. Subject matter
wherein the single structure is located on or in an interior,
top structural barrier of the ventilated space.
Subclass:
249
With air pump:
This subclass is indented under subclass 241. Subject matter
comprising an air moving apparatus for forcing air into or
out of the ventilated space.
SEE OR SEARCH THIS CLASS, SUBCLASS:
105 for a railcar, bus, or trailer which includes both inlet
and outlet airways and an air pump.
subclasses 243+ for a sleeved vent having both inlet and
outlet airways and further including an air pump.
Subclass:
250
Natural ventilation including air passage through rooftop
(i.e., no air pump):
This subclass is indented under subclass 237. Subject matter
wherein the means for admitting air into the ventilated space
and means for exhausting air from the space function by means
other than an air moving apparatus for forcing air into or
out of the space and wherein one of the means comprises an
air carrying conduit which passes through an external top
barrier of the space.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 1+ for chimney or stack structure which may pass
through a roof.
Subclass:
251
With air pump means:
This subclass is indented under subclass 237. Subject matter
comprising air moving means for forcing air into or out of
the ventilated space.
SEE OR SEARCH THIS CLASS, SUBCLASS:
239 for inlet and outlet airways including automatic control
means and an air pump.
240 for inlet and outlet airways including a wind-operated
air pump.
subclasses 241+ for a unitary inlet and outlet housing with
an air pump, particularly subclasses 243+ and 249.
Subclass:
252
For both inlet and outlet airways:
This subclass is indented under subclass 251. Subject matter
wherein the air moving means directly contacts air to force
it into the ventilated space and directly contacts air to
force it out of the space.
(1) Note. While most subject matter in this subclass
comprises a means for contacting and forcing the air into the
ventilated space and a separate means for contacting and
forcing air out of the space, subject matter comprising a
single means which performs both functions is also included
herein.
SEE OR SEARCH THIS CLASS, SUBCLASS:
235 for subject matter having forced recirculation and both
inlet and outlet airways, and further having air pump means
for both of the airways, which airways are contained in a
unitary housing.
244 for a sleeved vent for a ceiling, wall, or floor with
air pump means for both inlet and outlet airways.
Subclass:
253
For outlet airway:
This subclass is indented under subclass 251. Subject matter
wherein the air moving means directly contacts air to force
it out of the ventilated space.
SEE OR SEARCH THIS CLASS, SUBCLASS:
252 for air pump means for both inlet and outlet airways.
Subclass:
254
HAVING INLET AIRWAY:
This subclass is indented under the class definition. Subject
matter comprising means for admitting air to a (ventilated)
space.
(1) Note. Subject matter relating to an airway which is not
specifically an inlet or outlet airway (i.e., the airway can
be used for either) is included in this and indented
subclasses.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 10+ for chimneys or stacks having inlet
airways.
107 for railcars, buses, or trailers having inlet airways.
subclasses 143+ for other vehicles having inlet airways.
Subclass:
255
Pressure regulation:
This subclass is indented under subclass 254. Apparatus
including means responsive to air conditions either in or
outside of an enclosure or the air condition in the supply
system for the enclosure to maintain a predetermined pressure
in said enclosure and/or a difference in pressure between
said enclosure and the outside atmosphere.
(1) Note. Systems which maintain enclosures under air
pressure but having no air condition responsive automatic
controls are in other appropriate subclasses of this class,
e.g., those having differential air input and discharge.
SEE OR SEARCH THIS CLASS, SUBCLASS:
70 for pressure regulation with a vehicle and note the
classes referred to under "SEARCH CLASS" for that subclass.
238 for pressure regulation of a structure which includes
both inlet and outlet airways.
340 for pressure regulation of a structure which includes an
outlet airway.
Subclass:
256
Including automatic control means:
This subclass is indented under subclass 254. Subject matter
comprising a means to sense a condition or change of
condition which condition or change of condition may or may
not occur, which means is effective to activate a separate
means for regulating the quantity or direction of the air
flowing into the ventilated space.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 70+ for automatic pressure regulation of a
vehicle ventilating system.
75 for automatic control of a vehicle ventilating system.
229 for automatic control of a forced recirculation
ventilating system.
238 for automatic pressure regulation of a ventilating
system having both inlet and outlet airways.
239 for automatic control of a ventilating system having
both inlet and outlet airways.
255 for automatic pressure regulation of a ventilating
system having an inlet airway.
340 for automatic pressure regulation of a ventilating
system having an outlet airway.
SEE OR SEARCH CLASS:
236, Automatic Temperature and Humidity Regulation,
appropriate subclasses for automatic control means for
controlling temperature or humidity.
Subclass:
257
Emergency smoke or fire responsive valve:
This subclass is indented under subclass 256. Subject matter
comprising a means for regulating the quantity of airflow
dependent on a means for sensing the presence of either (1)
gaseous emission from a sudden, unexpected flame of a serious
nature or (2) a flame.
SEE OR SEARCH THIS CLASS, SUBCLASS:
28 for a chimney or stacktop with air current regulating
means which is temperature responsive.
342 for a building outlet airway including an air pump and
having means for controlling or dealing with smoke.
357 for other building outlet airways have means for
controlling or dealing with smoke.
369 for fusible release controlled fire dampers.
SEE OR SEARCH CLASS:
126, Stoves and Furnaces, subclass 287.5 for fusible release
dampers for stoves or furnaces.
169, Fire Extinguishers, particularly subclass 42 and 56+
for fire extinguishing apparatus responsive to smoke or
fire.
Subclass:
258
Air temperature responsive:
This subclass is indented under subclass 256. Subject matter
wherein the relocatable slats or slat portions relocate due
to changes in the hotness or coldness of air.
SEE OR SEARCH CLASS:
236, Automatic Temperature and Humidity Regulation,
particularly subclass 49.1 for automatic temperature and
humidity regulation of a ventilator.
Subclass:
259
Including backdraft preventer:
This subclass is indented under subclass 254. Subject matter
comprising a means which senses pressure or direction of air
flow to or from a ventilated space and which acts to allow
airflow under certain sensed conditions and to obstruct
airflow under other sensed conditions.
(1) Note. The means usually permits flow in one direction
along a conduit while blocking flow in an opposite
direction.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 3+ for a backdraft preventer incorporated in
chimneytop or stacktop structure, particularly subclass 26.
subclasses 70+ for condition responsive pressure
maintenance inside a vehicle which may include a valve
194 for a blast or shock wave type of backdraft preventer.
227 for a backdraft preventer combined with a window.
238 for pressure regulation of a ventilation system which
includes both inlet and outlet airways.
255 for pressure regulation of a ventilation system which
includes an inlet airway.
340 for pressure regulation of a ventilation system which
includes an outlet airway.
353 for a backdraft preventer and fan for an outlet airway.
subclasses 359+ for a backdraft preventer for an outlet
airway.
Subclass:
260
Through roof eaves or rafters:
This subclass is indented under subclass 254. Subject matter
particularly adapted to directing air through an opening in
(1) a projecting overhang portion at the lower edge of a
structure's external top covering (i.e., roof) or (2) an
opening in or adjacent a sloping beam which supports a
structure's external top covering.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 228+ for means mixing recirculated air with
fresh air directed into a ventilated space.
SEE OR SEARCH CLASS:
236, Automatic Temperature and Humidity Regulation,
particularly subclass 13 for plenum-type fluid mixers with
automatic temperature and humidity regulation.
Subclass:
261
Including structure for mixing plural air streams together:
This subclass is indented under subclass 254. Subject matter
in which the means for admitting the air includes a
configuration which unites separately originating currents of
air into a combined current of air.
(1) Note. A means which mixes induced flow recirculation air
with fresh inlet air for flow into a ventilated space is
included in this and indented subclasses.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 228+ for a forced recirculation means which
mixes plural airstreams together.
SEE OR SEARCH CLASS:
236, Automatic Temperature and Humidity Regulation,
particularly subclass 13 for plenum-type fluid mixers with
automatic temperature and humidity regulation.
Subclass:
262
And having specific noise inhibiting structure:
This subclass is indented under subclass 261. Subject matter
in which particular significance is attributed to a
configuration which prevents or deadens unwanted sound
produced during the uniting of the separately originating
currents of air.
(1) Note. The specific noise inhibiting structure must be
positively claimed for proper original patent placement in
this subclass.
(2) Note. See the Search Class notes below for references to
lines between Class 454 and other classes.
SEE OR SEARCH THIS CLASS, SUBCLASS:
206 for a window mounted air pump including specific noise
inhibiting structure.
346 for an outlet airway having vibration absorbing or
preventing structure.
906 for a cross-reference art collection of ventilating
structure combined with noise inhibiting means.
SEE OR SEARCH CLASS:
181, Acoustics, particularly subclasses 212+ for a
fluid-conducting-type sound muffler of a general nature (and
see subclass 212 (1) Note, for the line between Class 181
and Class 454); and subclass 224 for a sound absorbing
ventilating duct or curb.
Subclass:
263
With shaped nozzle:
This subclass is indented under subclass 261. Subject matter
wherein the air uniting configuration includes a continuous
formed, projecting, air spout with an opening therethrough
for carrying one of the currents of air to be combined.
(1) Note. A flat plate with a hole or plurality of holes is
not considered to be a shaped nozzle unless it is on the end
or side of a formed, projecting, spout-like structure.
(2) Note. Structures which mix plural air streams together
and subsequently eject the combined air stream through a
nozzle are not included in this subclass.
SEE OR SEARCH THIS CLASS, SUBCLASS:
305 for an air distributing, ejecting inlet nozzle.
Subclass:
264
And readily movable air regulating louver, damper, or cover:
This subclass is indented under subclass 263. Subject matter
wherein the continuous, formed, projecting air spout has a
cooperating easily shiftable air permitting or preventing (1)
group of parallel or concentric slats, (2) internal body, or
(3) orifice cap or closure.
(1) Note. A louver, damper, or cover held in a single fixed
position by a separate, movable, screw, bolt, or other
permanent type, tool actuated fastener is not considered
"readily movable".
SEE OR SEARCH THIS CLASS, SUBCLASS:
221 for a window ventilator having an air passage between
the sill and the bottom of the sash which includes louvers.
224 for other window ventilators including louvers.
subclasses 265+ for other inlet airways including structure
for mixing plural air streams together and which include
louvers.
subclasses 277+ for a wall-type inlet airway including a
specific cover or shield for the exterior vent opening and
includes louvers.
288 for a baseboard-type inlet airway which may include
louvers.
290 for a floor-type inlet airway which may include
louvers.
subclasses 299+ for a ceiling-type inlet airway which may
include louvers.
subclasses 309+ for a wall-type inlet airway which includes
a louvered air distributor.
subclasses 325+ for an inlet airway including a specific
air distributor and additionally a louver which forms an
adjustable valve.
subclasses 335+ for an inlet airway without a specific air
distributor which includes a louver which forms an adjustable
valve.
subclasses 347+ for an outlet airway including an air pump
which may have air regulating louvers.
subclasses 358+ for other outlet airways which may have air
regulating louvers.
SEE OR SEARCH CLASS:
52, Static Structures (e.g., Buildings), particularly
subclass 473 for a louvered panel and 633 for location of
related structures in other classes.
160, Flexible or Portable Closure, Partition, or Panel,
subclasses 140+ for louver devices in which the slats are
flexible, or are interconnected to each other for relative
movement, or may be accumulated (e.g., venetian blinds). See
Class 160, Class Definition, for panel units made up of
plural strips, slats, etc.
Subclass:
265
With readily movable air regulating louver, damper, or
cover:
This subclass is indented under subclass 261. Subject matter
having an easily shiftable air permitting or preventing (1)
group of parallel or concentric slats, (2) internal body, or
(3) orifice cap or closure.
(1) Note. A louver, damper, or cover held in a single fixed
position by a separate, movable, screw, bolt, or other
permanent type, tool actuated fastener is not considered
"readily movable".
SEE OR SEARCH THIS CLASS, SUBCLASS:
221 for a window ventilator having an air passage between
the sill and the bottom of the sash which includes louvers.
224 for other window ventilators including louvers.
264 for an inlet airway including structure for mixing
plural air streams together which has a shaped nozzle and
includes louvers.
subclasses 277+ for a wall-type inlet airway including a
specific cover or shield for the exterior vent opening and
includes louvers.
288 for a baseboard-type inlet airway which may include
louvers.
290 for a floor-type inlet airway which may include
louvers.
subclasses 299+ for a ceiling-type inlet airway which may
include louvers.
subclasses 309+ for a wall-type inlet airway which includes
a louvered air distributor.
subclasses 325+ for an inlet airway including a specific
air distributor and additionally a louver which forms an
adjustable valve.
subclasses 335+ for an inlet airway without a specific air
distributor which includes a louver which forms an adjustable
valve.
subclasses 347+ for an outlet airway including an air pump
which may have air regulating louvers.
subclasses 358+ for other outlet airways which may have air
regulating louvers.
SEE OR SEARCH CLASS:
52, Static Structures (e.g., Buildings), particularly
subclass 473 for a louvered panel and 633 for location of
related structures in other classes.
160, Flexible or Portable Closure, Partition, or Panel,
subclasses 140+ for louver devices in which the slats are
flexible, or are interconnected to each other for relative
movement, or may be accumulated (e.g., venetian blinds). See
the Class 160 class definition, for Panel units made up of
plural strips, slats, etc.
Subclass:
266
Pivoted:
This subclass is indented under subclass 265. Subject matter
wherein the shiftable slats, body, cap, or closure swing
about a fixed axis region which is parallel to or within a
major air engaging surface thereof.
Subclass:
267
Plural:
This subclass is indented under subclass 266. Subject matter
having at least two swinging slats, bodies, caps, closures,
or a combination of at least two elements thereof.
(1) Note. A set of grouped pivoted slats (e.g., a pivoted
louver set) is considered sufficient for inclusion in this
subclass and its indented subclass.
Subclass:
268
Including parallel louver vanes:
This subclass is indented under subclass 267. Subject matter
wherein the multiple swinging slats, bodies, caps closures,
or combination thereof, include at least one set of slats
having swinging members everywhere equidistant from each
other.
Subclass:
269
With air pump:
This subclass is indented under subclass 261. Subject matter
wherein the air admitting means includes an air moving
apparatus for forcing the air into the ventilated space.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 228+ for an air pump used in combined inlet and
outlet ventilator apparatus which exhausts a portion of the
building air and returns the remaining portion of air to the
stationary structure of the building along with incoming
outside air, often into a combined stream of air.
338 for an inlet air way, including an air pump, of a
generally nonmixing nature.
Subclass:
270
Sleeved vent for ceiling, wall, or floor (e.g., thimble):
This subclass is indented under subclass 254. Subject matter
comprising a casing which acts alone and is inserted in an
interior top, side, or bottom structural barrier of the
(ventilated) space to direct air from an unconfined location
outside of the space to an adjacent unconfined location on an
opposite side of the barrier and within the space.
(1) Note. An air distributing register which works in
conjunction with an inlet duct is not included in this
subclass. The adjacent air on opposite sides of the barrier
must be unconfined by ducting or like structures.
(2) Note. An exterior, wall-type louver panel is not
included in this and indented subclasses unless the panel
guides air through a barrier directly into the ventilated
space.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 277+ for an exterior, wall-type louver panel for
a building vent.
subclasses 330+ for an air distributing register box,
frame, or grating which acts in conjunction with an inlet
airway or duct.
SEE OR SEARCH CLASS:
52, Static Structures (e.g., Buildings), subclass 302.1 for
a passage between an interior part of a building and ambient
atmosphere which does not direct or control air flow into a
ventilated space. See the notes in Class 52, subclass 198,
and in the main portion of the definitions.
Subclass:
271
Wall type:
This subclass is indented under subclass 270. Subject matter
wherein the barrier is a generally planar surface which
extends vertically (i.e., parallel to the force of gravity).
(1) Note. This and indented subclasses include many
bank-vault ventilators.
Subclass:
272
With air pump:
This subclass is indented under subclass 271. Subject matter
comprising an air moving apparatus for forcing air to or from
the ventilated space.
Subclass:
273
Having adjustable valve:
This subclass is indented under subclass 271. Subject matter
comprising a positively repositionable device for regulating
the quantity of airflow through the casing in the barrier.
Subclass:
274
Sliding or axially moveable:
This subclass is indented under subclass 273. Subject matter
wherein the regulating means (1) relocates along a path
parallel to a general direction of airflow immediately prior
to its contact with the means or (2) comprises a portion
which translates along another portion of the means.
(1) Note. Regarding (2), above, the airflow regulating means
usually comprises two adjacent surface elements each having a
group of holes therethrough, wherein the two elements
translate relative to one another to vary airflow by bringing
the groups of holes into and out of alignment with one
another.
Subclass:
275
Including specific cover or shield for exterior vent
opening:
This subclass is indented under subclass 254. Subject matter
wherein particular significance is attributed to a means
positioned over an outdoor aperture of an air passage leading
to a (ventilated) space so as to protect the air passage.
(1) Note. The means usually acts to protect the passage from
rain or outside debris.
(2) Note. A cover or shield not inherent to the structure of
the ventilating means (e.g., a building roof overhang) is not
included under this definition.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 4+ for a cap closure for a chimney or stacktop.
94 for a railcar, bus, or trailer having an exterior cap
closure for a vent.
subclasses 347+ for an outlet airway having an air pump and
which may include a readily moveable cover.
355 for an outlet airway having an air pump and including a
moveable access cover.
356 for an outlet airway having an air pump and including an
exterior neck with an enlarged, weather resistant cover.
subclasses 358+ for other outlet airways which may include
a readily moveable cover.
subclasses 367+ for other outlet airways with a specific
cover or shield for an exterior vent opening.
Subclass:
276
Wall type:
This subclass is indented under subclass 275. Subject matter
wherein the means is located in a generally planar surface
which extends vertically, i.e., parallel to the force of
gravity.
Subclass:
277
Louver:
This subclass is indented under subclass 276. Subject matter
including a plurality of generally parallel or concentric
slats or slat portions lying within a plane and spaced apart
to form an air passageway therebetween.
(1) Note. The dimension of a slat parallel to the direction
of air flowing past it must be larger than its overall
thickness to be considered a louver slat. Unless it is
claimed in combination with, or as part of louver slats or
slat portions, wired mesh or a plate with a mere plurality of
holes is not considered to be a louver by itself.
SEE OR SEARCH THIS CLASS, SUBCLASS:
221 for a window ventilator having an air passage between
the sill and the bottom of the sash which includes louvers.
224 for other window ventilators including louvers.
264 for an inlet airway including structure for mixing
plural air streams together which has a shaped nozzle and
includes louvers.
subclasses 265+ for other inlet airways including structure
for mixing plural air streams together and which include
louvers.
288 for a baseboard-type inlet airway which may include
louvers.
290 for a floor-type inlet airway which may include
louvers.
subclasses 299+ for a ceiling-type inlet airway which may
include louvers.
subclasses 309+ for a wall-type inlet airway which includes
a louvered air distributor.
subclasses 325+ for an inlet airway including a specific
air distributor and additionally a louver which forms an
adjustable valve.
subclasses 335+ for an inlet airway without a specific air
distributor which includes a louver which forms an adjustable
valve.
subclasses 347+ for an outlet airway including an air pump
which may have air regulating louvers.
subclasses 358+ for other outlet airways which may have air
regulating louvers.
SEE OR SEARCH CLASS:
52, Static Structures (e.g., Buildings), particularly
subclass 473 for a louvered panel and 633 for location of
related structures in other classes.
160, Flexible or Portable Closure, Partition, or Panel,
subclasses 140+ for louver devices in which the slats are
flexible, or are interconnected to each other for relative
movement, or may be accumulated (e.g., venetian blinds). See
Class 160, Class Definition, for Panel units made up of
plural strips, slats, etc..
312, Supports: Cabinet Structure, particularly subclass 213
and 236 for cabinets having ventilating features.
Subclass:
278
Having moveable vanes:
This subclass is indented under subclass 277. Subject matter
comprising means for relocating the slats or slat portions
either (1) individually or (2) simultaneously or (3) as a
unit along with supporting structure therefore.
(1) Note. A means for relocating the slats or slat portions
which merely involves permanently deforming the slats is not
included in this subclass.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 313+ for an air distributor having a moveable
louver.
Subclass:
279
Having serially aligned vane sets:
This subclass is indented under subclass 277. Subject matter
comprising two groups of slats or slat portions which act on
contact airflow through the device one after another, i.e.,
sequentially.
Subclass:
280
Formed in sheet member:
This subclass is indented under subclass 277. Subject matter
comprising a single plate element having two or more
ventilating air passages therethrough.
Subclass:
281
Having specific vane supporting means:
This subclass is indented under subclass 277. Subject matter
wherein particular significance is attributed to means for
directly contacting and holding one of the slats in
position.
(1) Note. Specific vane supporting means must be claimed for
inclusion in this subclass. A mere "means for mounting a
louver slat" is not sufficient for inclusion in this
subclass.
(2) Note. A specific supporting means for attaching one slat
to an adjacent slat is included in this subclass.
Subclass:
282
In between vane ends:
This subclass is indented under subclass 281. Subject matter
comprising means located intermediate the lengthwise
extremities of one of the vane-like strips or strip portions
which holds the strip or strip portion in position.
(1) Note. The supporting means may connect a strip or strip
portion with a louver framing member or with an adjoining
strip or strip portion.
Subclass:
283
With screen mounting means:
This subclass is indented under subclass 277. Subject matter
comprising means to hold in position a mesh-like element
through which the air flows.
Subclass:
284
Including specific air distributor (e.g., register, etc.):
This subclass is indented under subclass 254. Subject matter
comprising particular means for directing the air as it
enters the ventilated space.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 108+ for railcars, buses, or trailers having
specific air distributors.
subclasses 152+ for other types of vehicles having specific
air distributors.
subclasses 185+ for hollow partitions which may disclose
specific air distributors.
subclasses 270+ for a sleeved vent in a ceiling, wall, or
floor.
SEE OR SEARCH CLASS:
34, Drying and Gas or Vapor Contact With Solids, particularly
subclass 222, 229, and 231 for houses, kilns, and containers
of that type having gas or vapor distributors.
Subclass:
285
Sweeping type:
This subclass is indented under subclass 284. Subject matter
comprising means for guiding the air along a regularly
changing directional path.
SEE OR SEARCH THIS CLASS, SUBCLASS:
125 for a sweeping-type vehicle window defroster.
153 for a sweeping-type ventilating air distributor in a
vehicle.
Subclass:
286
Having airway joint with ball or cylinder rotatable in a
socket:
This subclass is indented under subclass 284. Subject matter
wherein the air directing means has a hollow, air passing
connection consisting of an inner member having a spherical
or circular, tube shaped (i.e., cylindrical surface) portion
located in an outer mating cavity member to permit rotating
movement therebetween in plural directions.
(1) Note. The socket portion may not be spherical or
cylindrical.
SEE OR SEARCH THIS CLASS, SUBCLASS:
154 for a vehicle inlet airway having a swiveling nozzle air
distributor which may be of the ball and socket type.
316 for a repositionable set of air distributing louvers and
for louvers mounted in a nonairpassing or a nonsupporting
ball or cylinder.
317 for rotating disk-type air distributing inlet louvers.
Subclass:
287
Baseboard type:
This subclass is indented under subclass 284. Subject matter
wherein the air directing means is located at the juncture of
an interior, side structural barrier (i.e., wall) and an
interior, bottom structural barrier (i.e., floor) of the
ventilated space.
(1) Note. This subclass includes a floor-type air
distributor having a hood above the floor for directing the
air laterally.
Subclass:
288
Including portion or element movable during normal use:
This subclass is indented under subclass 287. Subject matter
wherein the air directing means has a part or component
capable of motion under usual operating conditions.
(1) Note. A movable portion or element which only moves
during installation of the ventilator, but not subsequently,
is not considered proper for this subclass. A readily
repositionable portion or element which is bodily movable
(e.g., louver vanes or a cover plate) without the use of a
special tool (e.g., a screwdriver) is proper for this
subclass since this is part of its normal intended use.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 333+ for an inlet airway with an adjustable
valve.
338 for an inlet airway wherein the movable portion or
element is an air pump or is combined with an air pump.
Subclass:
289
Floor type:
This subclass is indented under subclass 284. Subject matter
wherein the air directing means is located on or in an
interior, bottom structural barrier of the ventilated space
(i.e., floor).
(1) Note. This and indented subclasses do not include a
floor-type air distributor having a hood above the floor for
directing the air laterally.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 287+ for a floor-type air distributor having a
hood above the floor for directing the air laterally.
Subclass:
290
Having adjustable valve:
This subclass is indented under subclass 289. Subject matter
comprising a positively repositionable device for regulating
the quantity of airflow.
Subclass:
291
With means for liquid contact:
This subclass is indented under subclass 289. Subject matter
comprising means for directly exposing the air to water or
another liquid.
(1) Note. Dehumidifying means are not considered to be means
for liquid contact.
SEE OR SEARCH THIS CLASS, SUBCLASS:
110 for a railcar, bus, or trailer in which the inlet air is
exposed to a liquid.
157 for other vehicles in which the inlet air is exposed to
a liquid.
223 for a window ventilator having an air passage between
the sill and the bottom of the sash in which the air is
exposed to a liquid.
328 for other types of registers in a building where the
inlet air is exposed to a liquid.
337 for inlet airways for static structures, in
general,(e.g., buildings) where the inlet air is exposed to a
liquid.
SEE OR SEARCH CLASS:
126, Stoves and Furnaces, subclass 313 for air moistening
attachments for stovepipes and subclass 508 for a fireplace
with a room humidifier.
159, Concentrating Evaporators, subclass 5 for concentrating
evaporators designed to evaporate a liquid in film or thin
layer form.
237, Heating Systems, subclasses 78+ for air moistening
devices used in heating systems.
239, Fluid Sprinkling, Spraying, and Diffusing, for slow
diffusers.
261, Gas and Liquid Contact Apparatus, appropriate subclasses
for air moistening devices, per se, and subclasses 127+ for
heating and cooling devices combined with moisteners for the
air. Devices including significant ventilating structure and
excluding specific heating or cooling structure will be found
in this Class (454).
312, Supports: Cabinet Structure, subclasses 31+ for gas or
vapor treatment of material contained within a cabinet
structure.
Subclass:
292
Ceiling type:
This subclass is indented under subclass 284. Subject matter
wherein the air directing means is located on or in an
interior, top structural barrier of the ventilated space.
SEE OR SEARCH THIS CLASS, SUBCLASS:
306 for an air duct extending into the room and often
suspended from the ceiling.
Subclass:
293
With light fixture:
This subclass is indented under subclass 292. Subject matter
wherein the air directing means is combined with an
illuminating device.
Subclass:
294
Air passes over lamp:
This subclass is indented under subclass 293. Subject matter
wherein the air flows over and contacts a source of
illumination associated with the illuminating device.
Subclass:
295
Having adjustable valve:
This subclass is indented under subclass 293. Subject matter
wherein the air directing means includes a positively
repositionable means for regulating the airflow quantity.
(1) Note. Opening or closing of an airflow quantity
regulating means by air pressure alone is not considered to
be positive repositioning thereof.
SEE OR SEARCH THIS CLASS, SUBCLASS:
311 for an inlet air distributer having a louver with
concentric vanes and separate, adjustable internal damper.
subclasses 333+ for other types of inlet airways with
adjustable valves.
Subclass:
296
Including perforated or porous element:
This subclass is indented under subclass 292. Subject matter
wherein the air directing means includes a component either
(1) having a plurality of air passing holes cut or formed in
it or (2) formed from an air permeable material.
(1) Note. While the panel need not be in a single plane
(e.g., it may undulate), the holes themselves, when formed or
cut, do not extend beyond the surface of the surrounding
panel taken as a whole. For example, they do not form nor do
they support projecting nozzles or form louvers with
projecting air directing slat portions which are above the
adjacent panel surface.
Subclass:
297
Having portion or element movable during normal use:
This subclass is indented under subclass 296. Subject matter
wherein the air directing means has a part capable of motion
under usual operating conditions.
(1) Note. A movable portion which only moves during
installation of the ventilator, but not subsequently, is not
considered proper for this subclass. A readily repositionable
portion or element which is bodily movable (e.g., louver
vanes or a cover plate) without the use of a special tool
(e.g., a screwdriver) is proper for this subclass since this
is part of its normal intended use.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 333+ for an inlet airway with an adjustable
valve.
338 for an inlet airway wherein the movable portion or
element is an air pump or is combined with an air pump.
Subclass:
298
Axially movable or sliding valve:
This subclass is indented under subclass 297. Subject matter
comprising a means for regulating the quantity of airflow
wherein the means (1) relocates along a path parallel to a
general direction of airflow immediately prior to its contact
with the means or (2) translates along another portion of the
means.
(1) Note. Regarding (2), above, the airflow altering means
usually comprises two adjacent surface elements each having a
group of holes therethrough, wherein the two elements
translate relative to one another to vary airflow by bringing
the groups of holes into and out of alignment with one
another.
Subclass:
299
Including plural vanes:
This subclass is indented under subclass 292. Subject matter
wherein the air directing means includes a plurality of air
guiding slats or slat-like portions.
(1) Note. The portions may be integral with or separately
attached to the rest of the air directing means.
(2) Note. The dimension of the slats or slat-like portions
parallel to the direction of air flow past them must be
larger than the overall thickness of the slat or slat-like
portion.
(3) Note. Cooperation of the vane structure with a ceiling
must be claimed for proper original patent placement
hereunder.
SEE OR SEARCH THIS CLASS, SUBCLASS:
221 for a window ventilator having an air passage between
the sill and the bottom of the sash which includes louvers.
224 for other window ventilators including louvers.
264 for an inlet airway including structure for mixing
plural air streams together which has a shaped nozzle and
includes louvers.
subclasses 265+ for other inlet airways including structure
for mixing plural air streams together and which include
louvers.
subclasses 277+ for a wall-type inlet airway including a
specific cover or shield for the exterior vent opening and
includes louvers.
288 for a baseboard-type inlet airway which may include
louvers.
290 for a floor-type inlet airway which may include
louvers.
subclasses 309+ for a wall-type inlet airway which includes
a louvered air distributor.
subclasses 325+ for an inlet airway including a specific
air distributor and additionally a louver which forms an
adjustable valve.
subclasses 335+ for an inlet airway without a specific air
distributor which includes a louver which forms an adjustable
valve.
subclasses 347+ for an outlet airway including an air pump
which may have air regulating louvers.
subclasses 358+ for other outlet airways which may have air
regulating louvers.
SEE OR SEARCH CLASS:
52, Static Structures (e.g., Buildings), particularly
subclass 473 for a louvered panel and 633 for location of
related structures in other classes.
160, Flexible or Portable Closure, Partition, or Panel,
subclasses 140+ for louver devices in which the slats are
flexible, or are interconnected to each other for relative
movement, or may be accumulated (e.g., venetian blinds). See
Class 160, Class Definition, for Panel units made up of
plural strips, slats, etc..
Subclass:
300
Concentric:
This subclass is indented under subclass 299. Subject matter
wherein the slats or slat-like portions of the air directing
means are located parallel to and nested within one another.
(1) Note. The concentric vanes need not be nested in the
same general plane.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 310+ for concentric inlet air distributing
louvers where the cooperation with the ceiling is not
claimed.
Subclass:
301
Including elongated output slot:
This subclass is indented under subclass 292. Subject matter
wherein the air directing means includes or forms an oblong
airway opening for admitting the air into the chamber.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 296+ for a ceiling-type air distributor often
having elongated perforation or porous openings.
subclasses 299+ for a ceiling-type air distributor having
elongated slots formed between plural vanes.
Subclass:
302
Single, annular output slot:
This subclass is indented under subclass 301. Subject matter
wherein the oblong airway opening is in the shape of a lone,
closed ring.
(1) Note. The ring need not be circular to be considered
annular.
Subclass:
303
Having portion or element movable during normal use:
This subclass is indented under subclass 301. Subject matter
wherein the air directing means has a part or component
capable of motion under usual operating conditions.
(1) Note. A movable portion or element which only moves
during installation of the ventilator, but not subsequently,
is not considered proper for this subclass. A readily
repositionable portion or element which is bodily movable
(e.g., a cover plate) without the use of a special tool
(e.g., a screwdriver) is proper for this subclass since this
is part of its normal intended use.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 333+ for an inlet airway with an adjustable
valve.
338 for an inlet airway wherein the movable portion or
element is an air pump or is combined with an air pump.
Subclass:
304
Pivoted:
This subclass is indented under subclass 303. Subject matter
wherein the part or component capable of motion swings about
a fixed axis region which is parallel to or within a major
surface area of the part or component.
Subclass:
305
Air nozzle:
This subclass is indented under subclass 284. Subject matter
wherein the air directing means includes a projecting, air
concentrating spout with an air passageway therethrough.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 263+ for nozzle used in mixing air for an inlet
airway.
subclasses 296+ for a perforated or porous plate
ceiling-type diffuser.
306 for an air distributer having an air duct extending into
a room.
Subclass:
306
Having air duct extending into room:
This subclass is indented under subclass 284. Subject matter
wherein the air directing means includes an elongated tubular
air passageway projecting through a barrier and into the
ventilated space.
(1) Note. The extended air duct may subsequently pass out of
the room.
(2) Note. This subclass includes many inlet ventilation
means combined with furniture.
Subclass:
307
Having air deflecting wall extending into room:
This subclass is indented under subclass 284. Subject matter
wherein the air directing means comprises an air guiding
panel or surface structure which projects into the ventilated
space.
SEE OR SEARCH THIS CLASS, SUBCLASS:
215 for a wall for upwardly deflecting inlet air which wall
is sloped or can be readily sloped downward from the window.
subclasses 216+ for a window ventilator including a wall
for upwardly deflecting inlet air.
221 for a window having a panel comprising parallel or
concentric air guiding slats which upwardly deflects inlet
air.
306 for an inlet airway having an air duct extending into a
room.
Subclass:
308
Having vanes or elongated output slots extending radially:
This subclass is indented under subclass 284. Subject matter
wherein the air directing means comprises a plurality of
slats, slat portions, or oblong airway openings which radiate
away from a common center.
SEE OR SEARCH THIS CLASS, SUBCLASS:
274 for wall-type thimbles with sliding valves, many of
which have radially extending output slots.
Subclass:
309
Louvered air distributor:
This subclass is indented under subclass 284. Subject matter
wherein the air directing means includes a plurality of
generally parallel or concentric slats, or slat portions
spaced apart to form an air passageway therebetween.
(1) Note. The dimension of the slats parallel to the
direction of air flow past them must be larger than the
overall thickness of the slat to be considered a louver
slat.
SEE OR SEARCH THIS CLASS, SUBCLASS:
221 for a window ventilator having an air passage between
the sill and the bottom of the sash which includes louvers.
224 for other window ventilators including louvers.
264 for an inlet airway including structure for mixing
plural air streams together which has a shaped nozzle and
includes louvers.
subclasses 265+ for other inlet airways including structure
for mixing plural air streams together and which include
louvers.
subclasses 277+ for a wall-type inlet airway including a
specific cover or shield for the exterior vent opening and
includes louvers.
288 for a baseboard-type inlet airway which may include
louvers.
290 for a floor-type inlet airway which may include
louvers.
subclasses 299+ for a ceiling-type inlet airway which may
include louvers.
subclasses 325+ for an inlet airway including a specific
air distributor and additionally a louver which forms an
adjustable valve.
subclasses 335+ for an inlet airway without a specific air
distributor which includes a louver which forms an adjustable
valve.
subclasses 347+ for an outlet airway including an air pump
which may have air regulating louvers.
subclasses 358+ for other outlet airways which may have air
regulating louvers.
SEE OR SEARCH CLASS:
52, Static Structures (e.g., Buildings), particularly
subclass 473 for a louvered panel and 633 for location of
related structures in other classes.
160, Flexible or Portable Closure, Partition, or Panel,
subclasses 140+ for louver devices in which the slats are
flexible, or are interconnected to each other for relative
movement, or may be accumulated (e.g., venetian blinds). See
Class 160, Class Definition, for Panel units made up of
plural strips, slats, etc..
Subclass:
310
Concentric:
This subclass is indented under subclass 309. Subject matter
wherein the slats or slat portions of the air directing means
are located parallel to and nest within one another.
(1) Note. The concentric vanes need not be nested in the
same general plane.
SEE OR SEARCH THIS CLASS, SUBCLASS:
300 for concentric air distributing vanes cooperating with a
claimed ceiling air distributor.
Subclass:
311
Having separate, adjustable internal damper:
This subclass is indented under subclass 310. Subject matter
wherein the air directing means includes, in addition to the
slats or slat-like portions, a positively repositionable, air
permitting or preventing inner body which is configured such
that it remains completely within the confines of the air
directing means in all of its positions.
(1) Note. Opening or closing of a damper by air pressure
alone is not considered to be positive repositioning
thereof.
SEE OR SEARCH THIS CLASS, SUBCLASS:
295 for an inlet ceiling-type air distributor and light
having an adjustable valve.
312 for an inlet airway with concentric air distributing
vanes and an adjustable vane for directing the air.
subclasses 333+ for an inlet airway having an adjustable
valve.
Subclass:
312
Having adjustable vane:
This subclass is indented under subclass 310. Subject matter
wherein at least one of the slats or slat-like portions is
positively repositionable.
SEE OR SEARCH THIS CLASS, SUBCLASS:
311 for a separate, adjustable internal damper in addition
to the vanes.
Subclass:
313
Moveable:
This subclass is indented under subclass 309. Subject matter
wherein the slats or slat portions of the air directing means
are nondeformably relocatable either (1) individually or (2)
simultaneously or (3) as a unit along with supporting
structure therefore.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 333+ for an inlet airway with an adjustable
valve.
Subclass:
314
Aligned multiple, movable sets of vanes:
This subclass is indented under subclass 313. Subject matter
wherein at least two groups of relocatable slats or slat
portions direct the air along the same general pathway.
Subclass:
315
Serially arranged sets:
This subclass is indented under subclass 314. Subject matter
wherein one of the groups of relocatable slats or slat
portions is located completely behind the other group in the
direction of airflow.
Subclass:
316
Repositionable set:
This subclass is indented under subclass 313. Subject matter
wherein the slats or slat portions are relocatable as a unit
along with supporting structure therefore.
SEE OR SEARCH THIS CLASS, SUBCLASS:
286 for an air distributor having an airway joint with a
ball or cylinder rotatable in a socket.
Subclass:
317
Rotating disks:
This subclass is indented under subclass 313. Subject matter
wherein the relocatable slats or slat portion are round
planar members which revolve about an axis transverse to the
planes of the members.
Subclass:
318
Louver vanes form valve:
This subclass is indented under subclass 313. Subject matter
wherein the relocatable slats or slat portions themselves
form a means for regulating the quantity of airflow.
Subclass:
319
Plural vanes pivoting about individual axes:
This subclass is indented under subclass 313. Subject matter
wherein the relocatable slats or slat portions each rotate
about separate axes.
SEE OR SEARCH THIS CLASS, SUBCLASS:
318 for an air distributor having plural louver vanes which
themselves form a valve.
Subclass:
320
Pivot at leading or trailing vane edge:
This subclass is indented under subclass 319. Subject matter
wherein at least one of the separate axes is at the forward
or rearward extreme of a slat or slat portion as viewed in
the direction of airflow.
Subclass:
321
In housing within room:
This subclass is indented under subclass 309. Subject matter
wherein the slats or slat portions are part of an enclosure
which is positioned substantially inside the ventilated
space.
(1) Note. A register located within a ceiling, floor, or
wall which includes a portion which projects into the
ventilated space is not included in this subclass.
Subclass:
322
With adjustable valve:
This subclass is indented under subclass 284. Subject matter
which includes, in addition to the air directing means, a
positively repositionable means for regulating the airflow
quantity.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 273+ for an inlet airway including an
independent vent sleeve in a ceiling, wall, or floor which
contains an adjustable valve.
307 for an adjustable air distributing valve comprising an
air deflecting wall extending into a ventilated space.
318 for an air distributor having movable louver vanes which
form an adjustable valve.
subclasses 333+ for an inlet airway adjustable valve not
associated with a means for guiding inlet air immediately
into the ventilated space.
Subclass:
323
Axially movable:
This subclass is indented under subclass 322. Subject matter
wherein the positively repositionable airflow regulating
means relocates along a path parallel to a general direction
of airflow immediately prior to its contact with the means.
SEE OR SEARCH THIS CLASS, SUBCLASS:
274 for an independent vent sleeve in a ceiling, wall, or
floor which contains an axially movable valve.
Subclass:
324
Sliding:
This subclass is indented under subclass 322. Subject matter
wherein a portion of the positively repositionable airflow
regulating means translates along another portion of the
means.
SEE OR SEARCH THIS CLASS, SUBCLASS:
274 for an independent vent sleeve in a ceiling, wall, or
floor which contains a sliding valve.
Subclass:
325
Plural blades pivoting along parallel axes:
This subclass is indented under subclass 322. Subject matter
wherein the airflow regulating means comprises at least two
slats or panels rotating about axes extending parallel to one
another.
(1) Note. Subject matter including plural blades pivoting
along coincident axes is included in this subclass.
(2) Note. This subclass includes subject matter pertaining
to a single pivoting blade structure wherein the blade is
disclosed as being one of a plurality which pivot along
parallel axes.
SEE OR SEARCH THIS CLASS, SUBCLASS:
221 for a window ventilator having an air passage between
the sill and the bottom of the sash which includes louvers.
224 for other window ventilators including louvers.
264 for an inlet airway including structure for mixing
plural air streams together which has a shaped nozzle and
includes louvers.
subclasses 265+ for other inlet airways including structure
for mixing plural air streams together and which include
louvers.
subclasses 277+ for a wall-type inlet airway including a
specific cover or shield for the exterior vent opening and
includes louvers.
288 for a baseboard-type inlet airway which may include
louvers.
290 for a floor-type inlet airway which may include
louvers.
subclasses 299+ for a ceiling-type inlet airway which may
include louvers.
subclasses 309+ for a wall-type inlet airway which includes
a louvered air distributor.
subclasses 335+ for an inlet airway without a specific air
distributor which includes a louver which forms an adjustable
valve.
subclasses 347+ for an outlet airway including an air pump
which may have air regulating louvers.
subclasses 358+ for other outlet airways which may have air
regulating louvers.
SEE OR SEARCH CLASS:
52, Static Structures (e.g., Buildings), particularly
subclass 473 for a louvered panel and 633 for location of
related structures in other classes.
160, Flexible or Portable Closure, Partition, or Panel,
subclasses 140+ for louver devices in which the slats are
flexible, or are interconnected to each other for relative
movement, or may be accumulated (e.g., venetian blinds). See
Class 160, Class Definition, for Panel units made up of
plural strips, slats, etc..
Subclass:
326
Adjacent blades pivot in opposing directions:
This subclass is indented under subclass 325. Subject matter
wherein the two slats or panels are positioned next to
another and wherein the slats or panels rotate about their
axes in opposite directions.
Subclass:
327
Valve opens by pivoting in upstream direction:
This subclass is indented under subclass 322. Subject matter
wherein the air regulating means comprises an element which
opens by rotating about a fixed axis toward the source of the
air being admitted to the ventilated space.
(1) Note. This device is often referred to as an inward
pivoted valve and usually is composed of a pivoting blade or
panel.
Subclass:
328
With Means for liquid contact:
This subclass is indented under subclass 284. Subject matter
comprising means for directly exposing the air to water or
another liquid.
(1) Note. Dehumidifying means are not considered to be means
for liquid contact.
SEE OR SEARCH THIS CLASS, SUBCLASS:
110 for a railcar, bus, or trailer in which the inlet air is
exposed to a liquid.
157 for other vehicles in which the inlet air is exposed to
a liquid.
223 for a window ventilator having an air passage between
the sill and the bottom of the sash in which the air is
exposed to a liquid.
291 for a floor-type register in a building where the inlet
air is exposed to a liquid.
337 for inlet airways for static structures, in general,
(e.g., buildings) where the inlet air is exposed to a
liquid.
SEE OR SEARCH CLASS:
126, Stoves and Furnaces, subclass 313 for air moistening
attachments for stovepipes and subclass 508 for a fireplace
with a room humidifier.
159, Concentrating Evaporators, subclass 5 for concentrating
evaporators designed to evaporate a liquid in film or thin
layer form.
237, Heating Systems, subclasses 78+ for air moistening
devices used in heating systems.
239, Fluid Sprinkling, Spraying, and Diffusing, for slow
diffusers.
261, Gas and Liquid Contact Apparatus, appropriate subclasses
for air moistening devices, per se, and subclasses 127+ for
heating and cooling devices combined with moisteners for the
air. Devices including significant ventilating structure and
excluding specific heating or cooling structure will be found
in this Class 454.
312, Supports: Cabinet Structure, subclasses 31+ for gas or
vapor treatment of material contained within a cabinet
structure.
Subclass:
329
With air pump:
This subclass is indented under subclass 284. Subject matter
wherein the air admitting means includes an air moving
apparatus for forcing the air into the ventilated space.
SEE OR SEARCH THIS CLASS, SUBCLASS:
269 for an inlet airway having an air pump and structure for
mixing plural airstreams together.
272 for an independent vent sleeve in a ceiling, wall, or
floor which includes an air pump.
Subclass:
330
Having register box, frame, or grating:
This subclass is indented under subclass 284. Subject matter
comprising a casing, support, or grill-like exit structure
for a means which releases or directs the air immediately
into the ventilated space.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 270+ for a sleeved vent in a ceiling, wall, or
floor.
Subclass:
331
Including specific grating or grating mounting structure:
This subclass is indented under subclass 330. Subject matter
wherein particular significance is attributed to (1) a
grill-like exit structure or (2) a means for attaching a
grill-like exit structure directly to a support.
Subclass:
332
Readily moveable grating:
This subclass is indented under subclass 331. Subject matter
wherein the grill-like exit structure and accompanying
support are easily repositioned relative to one another.
(1) Note. A grill-like exit structure which requires a tool
such as a screwdriver to reposition it relative to an
accompanying support is not included in this subclass.
Subclass:
333
With adjustable valve (e.g., damper, etc.):
This subclass is indented under subclass 254. Subject matter
wherein the air directing means includes a positively
repositionable means for regulating the airflow quantity.
SEE OR SEARCH THIS CLASS, SUBCLASS:
264 for an inlet airway including structure for mixing
plural air streams together which has a shaped nozzle and may
include an adjustable valve.
subclasses 265+ for other inlet airways which include
structure for mixing plural air streams together and which
may include an adjustable valve.
subclasses 273+ for an inlet airway including an
independent vent sleeve in a ceiling, wall, or floor which
contains an adjustable valve.
288 for a baseboard-type air distributor which may include
an adjustable valve.
290 for a floor mounted air distributor having an adjustable
valve.
subclasses 297+ for a ceiling-type air distributor
including a perforated or porous element and an adjustable
valve.
subclasses 303+ for a ceiling-type air distributor
including an elongated output slot and an adjustable valve.
318 for an air distributor having movable louver vanes which
form an adjustable valve.
307 for an adjustable air distributing valve comprising an
air deflecting wall extending into a ventilated space.
311 for an air distributor having concentric louvers and a
separate, adjustable internal damper.
312 for an air distributor having adjustable, concentric,
louver vanes.
subclasses 313+ for a louvered air distributor having
moveable louvers.
subclasses 322+ for an adjustable valve associated with a
means for distributing inlet air immediately into the
ventilated space.
Subclass:
334
Axially movable or sliding:
This subclass is indented under subclass 333. wherein the
air regulating means (1) relocates along a path parallel to
the direction of the air immediately prior to its contact
with the means or (2) contains a portion which translates
along another portion of the means.
SEE OR SEARCH THIS CLASS, SUBCLASS:
274 for an independent vent sleeve in a ceiling, wall, or
floor which contains an adjustable, axially movable or
sliding valve.
323 for an air distributor with an axially movable,
adjustable valve.
324 for an air distributor with a sliding, adjustable
valve.
Subclass:
335
Plural blades pivoting along parallel axes:
This subclass is indented under subclass 333. Subject matter
wherein the airflow regulating means comprises at least two
slats or panels rotating about axes extending parallel to one
another.
(1) Note. Subject matter including plural blades pivoting
along coincident axes is included in this subclass.
(2) Note. This subclass includes subject matter pertaining
to a single pivoting blade structure wherein the blade is
disclosed as being one of a plurality which pivot along
parallel axes.
SEE OR SEARCH THIS CLASS, SUBCLASS:
221 for a window ventilator having an air passage between
the sill and the bottom of the sash which includes louvers.
224 for other window ventilators including louvers.
264 for an inlet airway including structure for mixing
plural air streams together which has a shaped nozzle and
includes louvers.
subclasses 265+ for other inlet airways including structure
for mixing plural air streams together and which include
louvers.
subclasses 277+ for a wall-type inlet airway including a
specific cover or shield for the exterior vent opening and
includes louvers.
288 for a baseboard-type inlet airway which may include
louvers.
290 for a floor-type inlet airway which may include
louvers.
subclasses 299+ for a ceiling-type inlet airway which may
include louvers.
subclasses 309+ for a wall-type inlet airway which includes
a louvered air distributor.
subclasses 325+ for an inlet airway including a specific
air distributor and additionally a louver which forms an
adjustable valve.
subclasses 347+ for an outlet airway including an air pump
which may have air regulating louvers.
subclasses 358+ for other outlet airways which may have air
regulating louvers.
SEE OR SEARCH CLASS:
52, Static Structures (e.g., Buildings), particularly
subclass 473 for a louvered panel and 633 for location of
related structures in other classes.
160, Flexible or Portable Closure, Partition, or Panel,
subclasses 140+ for louver devices in which the slats are
flexible, or are interconnected to each other for relative
movement, or may be accumulated (e.g., venetian blinds). See
Class 160, Class Definition, for Panel units made up of
plural strips, slats, etc..
Subclass:
336
Adjacent blades pivot in opposing directions:
This subclass is indented under subclass 335. Subject matter
wherein the two slats or panels are positioned next to one
another and wherein the slats or panels rotate about their
axes in opposite directions.
SEE OR SEARCH THIS CLASS, SUBCLASS:
326 for an air distributor with an adjustable valve having
adjacent blades pivoting along parallel axes.
Subclass:
337
With means for liquid contact:
This subclass is indented under subclass 254. Subject matter
comprising means for directly exposing the airflow to water
or another liquid.
(1) Note. Dehumidifying means are not considered to be means
for liquid contact.
SEE OR SEARCH THIS CLASS, SUBCLASS:
110 for a railcar, bus, or trailer in which the inlet air is
exposed to a liquid.
157 for other vehicles in which the inlet air is exposed to
a liquid.
223 for a window ventilator having an air passage between
the sill and the bottom of the sash in which the air is
exposed to a liquid.
291 for a floor-type register in a building where the inlet
air is exposed to a liquid.
328 for other types of registers in a building where the
inlet air is exposed to a liquid.
SEE OR SEARCH CLASS:
126, Stoves and Furnaces, subclass 313 for air moistening
attachments for stovepipes and subclass 508 for a fireplace
with a room humidifier.
159, Concentrating Evaporators, subclass 5 for concentrating
evaporators designed to evaporate a liquid in film or thin
layer form.
237, Heating Systems, subclasses 78+ for air moistening
devices used in heating systems.
239, Fluid Sprinkling, Spraying, and Diffusing, for slow
diffusers.
261, Gas and Liquid Contact Apparatus, appropriate subclasses
for air moistening devices, per se, and subclasses 127+ for
heating and cooling devices combined with moisteners for the
air. Devices including significant ventilating structure and
excluding specific heating or cooling structure will be found
in this Class 454.
312, Supports: Cabinet Structure, subclasses 31+ for gas or
vapor treatment of material contained within a cabinet
structure.
Subclass:
338
With air pump:
This subclass is indented under subclass 254. Subject matter
wherein the air admitting means includes an air moving
apparatus for forcing the air into the ventilated space.
SEE OR SEARCH CLASS:
181, Acoustics, particularly subclasses 212+ for a
fluid-conducting-type sound muffler of a general nature, and
see the (1) Note to subclass 212; and subclass 224 for a
sound absorbing ventilating duct or curb.
415, Rotary Kinetic Fluid Motors or Pumps, appropriate
subclasses for a blower, per se.
416, Fluid Reaction Surfaces (i.e., Impellers), appropriate
subclasses for a fan, per se.
417, Pumps, appropriate subclasses for a motor driven blower,
per se.
Subclass:
339
HAVING OUTLET AIRWAY:
This subclass is indented under the class definition. Subject
matter having means for exhausting air from a (ventilated)
space.
(1) Note. The ventilated space often comprises but is not
limited to a room in a building.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 115+ for a railcar, bus, or trailer having an
outlet airway.
subclasses 162+ for other types of vehicles having an
outlet airway.
SEE OR SEARCH CLASS:
4, Baths, Closets, Sinks, and Spittoons, subclasses 209+
for outlet ventilators of that class.
Subclass:
340
Pressure regulation:
This subclass is indented under subclass 237. Apparatus
including means responsive to air conditions either in or
outside of an enclosure or the air condition in the supply
system for the enclosure to maintain a predetermined pressure
in said enclosure and/or a difference in pressure between
said enclosure and the outside atmosphere.
(1) Note. Systems which maintain enclosures under air
pressure, but having no air condition responsive automatic
controls are in other appropriate subclasses of this class,
e.g., those having differential air input and discharge.
SEE OR SEARCH THIS CLASS, SUBCLASS:
70 for pressure regulation with a vehicle and note the
classes referred to under "SEARCH CLASS" for that subclass.
238 for pressure regulation of a structure which includes
both inlet and outlet airways.
255 for pressure regulation of a structure which includes an
inlet airway.
Subclass:
341
With air pump:
This subclass is indented under subclass 339. Subject matter
wherein the air exhausting means includes an air moving
apparatus for withdrawing the air out of the building.
SEE OR SEARCH CLASS:
181, Acoustics, particularly subclasses 212+ for a
fluid-conducting-type sound muffler of a general nature and
subclass 224 for a sound absorbing ventilating duct or curb.
415, Rotary Kinetic Fluid Motors or Pumps, appropriate
subclasses for a blower, per se.
416, Fluid Reaction Surfaces (i.e., Impellers), appropriate
subclasses for a fan, per se.
417, Pumps, appropriate subclasses for a motor driven blower,
per se.
Subclass:
342
And having specific emergency smoke handling structure:
This subclass is indented under subclass 341. Subject matter
in which significance is attributed to a specific
configuration for controlling or dealing with the gaseous
emission from a sudden, unexpected fire of a serious nature.
(1) Note. The specific emergency smoke handling structure
must be positively claimed for proper original patent
placement in this subclass.
(2) Note. The claimed presence of a heat sensitive element,
e.g., a fusible link, is considered adequate if it is
disclosed for causing the ventilator to control or deal with
any smoke caused by fire.
SEE OR SEARCH THIS CLASS, SUBCLASS:
28 for a chimney or stacktop with air current regulating
means which is temperature responsive.
257 for a building inlet airway including an emergency smoke
or fire responsive valve.
357 for other building outlet airways having means for
controlling or dealing with smoke.
369 for fusible release controlled fire dampers.
SEE OR SEARCH CLASS:
126, Stoves and Furnaces, subclass 287.5 for fusible release
dampers for stoves or furnaces.
169, Fire Extinguishers, particularly subclass 42 and 56+
for fire extinguishing apparatus responsive to smoke or
fire.
Subclass:
343
Having specific air pump actuator:
This subclass is indented under subclass 341. Subject matter
in which significance is attributed to a specific activator
for causing the air moving apparatus to operate or stop
operating.
(1) Note. Details of the specific activator must be
positively claimed for proper original patent placement in
this subclass.
SEE OR SEARCH CLASS:
236, Automatic Temperature and Humidity Regulation,
particularly subclass 49.1 for automatic temperature and
humidity regulation of a ventilator.
Subclass:
344
Pump induces draft in exit duct:
This subclass is indented under subclass 341. Subject matter
wherein the air moving apparatus forces a directed stream of
air out of an air withdrawal tube and the exhausting means to
create an area of lower air pressure in the tube and thus
cause air in the ventilated space to be withdrawn along with
the directed stream of air.
(1) Note. The air in the space is withdrawn by the draft
caused by the air pump and its directed stream of air--not
through, or by, the air pump alone.
Subclass:
345
Having plural suction intakes:
This subclass is indented under subclass 341. Subject matter
in which the air is withdrawn from multiple spaced apart
locations within the ventilated space.
(1) Note. The plural suction intakes must be positively
claimed for proper original patent placement in this
subclass.
Subclass:
346
Having vibration absorbing or preventing structure:
This subclass is indented under subclass 341. Subject matter
including structure which either (1) takes in without passing
on, or (2) prohibits at least part of any rapid, unwanted
shaking of the air exhausting means or a support therefore.
(1) Note. For the line between Class 454 and other classes,
see the Search Notes below.
SEE OR SEARCH THIS CLASS, SUBCLASS:
206 for a window mounted air pump including specific noise
inhibiting structure.
262 for an inlet airway, including structure for mixing
plural airstreams together, which has specific noise
inhibiting structure.
906 for a cross-reference art collection of ventilating
structure combined with noise inhibiting means.
SEE OR SEARCH CLASS:
181, Acoustics, appropriate subclasses. Note particularly
subclasses 212+ for a fluid-conducting-type sound muffler
of a general nature, and see the (1) Note to subclass 212 for
the lines to this class (454); and subclass 224 for a sound
absorbing ventilating duct.
Subclass:
347
Having readily movable air regulating louver, damper, or
cover:
This subclass is indented under subclass 341. Subject matter
including an easily shiftable air permitting or preventing
(1) group of parallel or concentric slats, (2) internal body,
or (3) orifice cap or closure.
(1) Note. A louver, damper, or cover held in a single fixed
position by a separate, movable, screw, bolt, or other
permanent type, tool actuated fastener is not considered
"readily movable".
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 4+ for a cap closure for a chimney or stacktop.
94 for a railcar, bus, or trailer having an exterior cap
closure for a vent.
221 for a window ventilator having an air passage between
the sill and the bottom of the sash which includes louvers.
224 for other window ventilators including louvers.
264 for an inlet airway including structure for mixing
plural air streams together which has a shaped nozzle and
includes louvers.
subclasses 265+ for other inlet airways including structure
for mixing plural air streams together and which include
louvers.
275 for an inlet airway having a specific cover or shield
for an exterior vent opening.
subclasses 277+ for a wall-type inlet airway including a
specific cover or shield for the exterior vent opening and
includes louvers.
288 for a baseboard-type inlet airway which may include
louvers.
290 for a floor-type inlet airway which may include
louvers.
subclasses 299+ for a ceiling type inlet airway which may
include louvers.
subclasses 309+ for a wall-type inlet airway which includes
a louvered air distributor.
subclasses 325+ for an inlet airway including a specific
air distributor and additionally a louver which forms an
adjustable valve.
subclasses 335+ for an inlet airway without a specific air
distributor which includes a louver which forms an adjustable
valve.
355 for an outlet airway having an air pump and including a
moveable access cover.
356 for an outlet airway having an air pump and including an
exterior neck with an enlarged, weather resistant cover.
subclasses 358+ for other outlet airways having a readily
movable louver, damper, or cover.
subclasses 367+ for other outlet airways having a specific
cover or shield for an exterior vent opening.
SEE OR SEARCH CLASS:
52, Static Structures (e.g., Buildings), particularly
subclass 473 for a louvered panel and 633 for location of
related structures in other classes.
126, Stoves and Furnaces, subclasses 285+ for miscellaneous
dampers not otherwise classifiable.
160, Flexible or Portable Closure, Partition, or Panel,
subclasses 140+ for louver devices in which the slats are
flexible, or are interconnected to each other for relative
movement, or may be accumulated (e.g., venetian blinds). See
Class 160, class definition, for Panel units made up of
plural strips, slats, etc.
Subclass:
348
Continuously horizontal damper panel:
This subclass is indented under subclass 347. Subject matter
comprising an easily shiftable, air permitting or preventing
inner body having an air engaging and controlling plate which
is always maintained in a position parallel to the horizon
while motion is being imparted to it and while it is being
used.
SEE OR SEARCH THIS CLASS, SUBCLASS:
29 for chimneytop or stacktop structure having a
continuously horizontal damper panel which is readily movable
to regulate an air current.
Subclass:
349
Ceiling mounted air pump:
This subclass is indented under subclass 347. Subject matter
wherein the air exhausting means is supported by and
withdraws air through an interior, top structural barrier of
the ventilated space.
Subclass:
350
Wall mounted air pump:
This subclass is indented under subclass 347. Subject matter
wherein the air exhausting means is supported by and
withdraws air through an interior, side structural barrier of
the ventilated space.
Subclass:
351
Plural damper panels:
This subclass is indented under subclass 350. Subject matter
comprising an easily shiftable air permitting or preventing
inner body having two or more air engaging and controlling
plates.
SEE OR SEARCH THIS CLASS, SUBCLASS:
6 for plural pivoted chimney or stacktop closures.
31 for plural pivoted air current regulating means in a
chimney or stacktop structure.
352 for plural damper panels in an outlet airway.
Subclass:
352
Plural damper panels:
This subclass is indented under subclass 347. Subject matter
comprising an easily shiftable air permitting or preventing
inner body having two or more air engaging and controlling
plates.
SEE OR SEARCH THIS CLASS, SUBCLASS:
6 for plural pivoted chimney or stacktop closures.
31 for plural pivoted air current regulating means in a
chimney or stacktop structure.
351 for plural damper panels in a wall mounted outlet
airway.
Subclass:
353
Including backdraft preventer:
This subclass is indented under subclass 347. Subject matter
having a means which senses pressure or direction of air flow
to or from a ventilated space and which acts to allow airflow
under certain sensed conditions and to obstruct airflow under
other sensed conditions.
(1) Note. The means usually permits flow in one direction
along a conduit while blocking flow in an opposite
direction.
(2) Note. This subclass commonly includes valves which open
when an air pump is turned on and close when the air pump is
turned off.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 3+ for a backdraft preventer incorporated in
chimneytop or stacktop structure, particularly subclass 26.
subclasses 70+ for condition responsive pressure
maintenance inside a vehicle which may include a valve.
194 for a blast or shock wave type of backdraft preventer.
227 for a backdraft preventer combined with a window.
238 for pressure regulation of a ventilation system which
includes both inlet and outlet airways.
255 for pressure regulation of a ventilation system which
includes an inlet airway.
259 for a backdraft preventer and an inlet airway.
340 for pressure regulation of a ventilation system which
includes an outlet airway.
subclasses 359+ for a backdraft preventer for an outlet
airway.
Subclass:
354
Ceiling or wall mounted:
This subclass is indented under subclass 341. Subject matter
wherein the air exhausting means is supported by and
withdraws the air through either an interior top or a side
structural barrier of the ventilated space.
(1) Note. Ceiling or wall mounted ventilators which are, in
addition, mounted to the roof, floor, or other structural
barrier of the ventilated space are included herein.
SEE OR SEARCH THIS CLASS, SUBCLASS:
195 for means combined with a door for ventilating a room.
subclasses 200+ for a ventilator with an air pump combined
with a window.
349 for an outlet airway having a readily movable air
regulating louver, damper, or cover combined with a ceiling
mounted fan.
subclasses 350+ for an outlet airway having a readily
movable air regulating louver, damper, or cover combined with
a wall mounted fan.
Subclass:
355
With movable access cover:
This subclass is indented under subclass 341. Subject matter
having a readily shiftable orifice cap or closure portion
which provides admittance by a human being to the air
exhausting means.
(1) Note. The movable cover may also be used to affect the
flow of air in some instances.
(2) Note. The specific means for permitting movement of the
cover must be claimed for proper original patent placement in
this subclass.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 4+ for a cap closure for a chimney or stacktop.
94 for a railcar, bus, or trailer having an exterior cap
closure for a vent.
275 for an inlet airway having a specific cover or shield
for an exterior vent opening.
subclasses 347+ for an outlet airway having an air pump and
which may include a readily moveable cover.
356 for an outlet airway having an air pump and including an
exterior neck with an enlarged, weather resistant cover.
subclasses 358+ for other outlet airways which may include
a readily moveable cover.
subclasses 367+ for other outlet airways with a specific
cover or shield for an exterior vent opening.
Subclass:
356
Having exterior neck with enlarged, weather resistant cover:
This subclass is indented under subclass 341. Subject matter
wherein the air exhausting means includes an outdoor portion
with an upstanding air passage stem connected to an end cap
or shelter which (1) has a larger dimension than the stem in
a direction transverse to the direction of airflow through an
exterior structural barrier, i.e., a wall or roof of the
ventilated space and (2) assists in diminishing the
deleterious effects of weather conditions.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 4+ for a cap closure for a chimney or stacktop.
94 for a railcar, bus, or trailer having an exterior cap
closure for a vent.
275 for an inlet airway having a specific cover or shield
for an exterior vent opening.
subclasses 347+ for an outlet airway having an air pump and
which may include a readily moveable cover.
355 for an outlet airway having an air pump and including a
moveable access cover.
subclasses 358+ for other outlet airways which may include
a readily moveable cover.
subclasses 367+ for other outlet airways having a specific
cover or shield for an exterior vent opening, particularly
subclass 368 for other outlet airways having an exterior neck
with an enlarged, weather resistant cover.
Subclass:
357
Having emergency smoke handling feature:
This subclass is indented under subclass 339. Subject matter
wherein the air exhausting means includes means for
controlling or dealing with the gaseous emission from a
sudden, unexpected fire of a serious nature.
(1) Note. The claimed presence of a heat sensitive element,
e.g., a fusible link considered adequate if it is disclosed
for causing the ventilator to control or deal with any smoke
caused by the fire.
SEE OR SEARCH THIS CLASS, SUBCLASS:
28 for a chimney or stacktop with air current regulating
means which is temperature responsive.
257 for a building inlet airway including an emergency smoke
or fire responsive valve.
342 for a building outlet airway including an air pump and
having means for controlling or dealing with smoke.
369 for fusible release controlled fire dampers.
SEE OR SEARCH CLASS:
126, Stoves and Furnaces, subclass 287.5 for fusible release
dampers for stoves or furnaces.
169, Fire Extinguishers, particularly subclass 42 and 56+
for fire extinguishing apparatus responsive to smoke or
fire.
Subclass:
358
Having readily movable air regulating louver, damper, or
cover:
This subclass is indented under subclass 339. Subject matter
wherein the air exhausting means includes an easily shiftable
air permitting or preventing (1) group of parallel or
concentric slats, (2) internal body, or (3) orifice cap or
closure.
(1) Note. A louver, damper, or cover held in a single fixed
position by a separate, movable, screw, bolt, or other
permanent type, tool actuated fastener is not considered
"readily movable".
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 4+ for a cap closure for a chimney or stacktop.
94 for a railcar, bus, or trailer having an exterior cap
closure for a vent.
221 for a window ventilator having an air passage between
the sill and the bottom of the sash which includes louvers.
224 for other window ventilators including louvers.
264 for an inlet airway including structure for mixing
plural air streams together which has a shaped nozzle and
includes louvers.
subclasses 265+ for other inlet airways including structure
for mixing plural air streams together and which include
louvers.
275 for an inlet airway having a specific cover or shield
for an exterior vent opening.
subclasses 277+ for a wall-type inlet airway including a
specific cover or shield for the exterior vent opening and
includes louvers.
288 for a baseboard-type inlet airway which may include
louvers.
290 for a floor-type inlet airway which may include
louvers.
subclasses 299+ for a ceiling-type inlet airway which may
include louvers.
subclasses 309+ for a wall-type inlet airway which includes
a louvered air distributor.
subclasses 325+ for an inlet airway including a specific
air distributor, and additionally, a louver which forms an
adjustable valve.
subclasses 335+ for an inlet airway without a specific air
distributor which includes a louver which forms an adjustable
valve.
subclasses 347+ for an outlet airway having an air pump and
a readily movable louver, damper, or cover.
355 for an outlet airway having an air pump and including a
moveable access cover.
356 for an outlet airway having an air pump and including an
exterior neck with an enlarged weather resistant cover.
subclasses 367+ for other outlet airways with a specific
cover or shield for an exterior vent opening.
SEE OR SEARCH CLASS:
52, Static Structures (e.g., Buildings), particularly
subclass 473 for a louvered panel and 633 for location of
related structures in other classes.
126, Stoves and Furnaces, subclasses 285+ for miscellaneous
dampers not otherwise classifiable.
160, Flexible or Portable Closure, Partition, or Panel,
subclasses 140+ for louver devices in which the slats are
flexible, or are interconnected to each other for relative
movement, or may be accumulated (e.g., venetian blinds). See
Class 160, class definition, for Panel units made up of
plural strips, slats, etc.
Subclass:
359
Including backdraft preventer:
This subclass is indented under subclass 358. Subject matter
including a means which senses pressure or direction of
airflow to or from a ventilated space and which acts to allow
airflow under certain sensed conditions and to obstruct
airflow under other sensed conditions.
(1) Note. The means usually permits flow in one direction
along a conduit while blocking flow in an opposite
direction.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 3+ for a backdraft preventer incorporated in
chimneytop or stacktop structure, particularly subclass 26.
subclasses 70+ for condition responsive pressure
maintenance inside a vehicle which may include a valve.
194 for a blast or shock wave type of backdraft preventer.
227 for a backdraft preventer combined with a window.
238 for pressure regulation of a ventilation system which
includes both inlet and outlet airways.
255 for pressure regulation of a ventilation system which
includes an inlet airway.
259 for a backdraft preventer and an inlet airway.
340 for pressure regulation of a ventilation system which
includes an outlet airway.
353 for a backdraft preventer and fan for an outlet airway.
Subclass:
360
Including counter balancing means:
This subclass is indented under subclass 359. Subject matter
including a means which mechanically biases the backdraft
preventer toward a particular position.
(1) Note. The backdraft preventer is usually biased to an
open or closed position.
SEE OR SEARCH THIS CLASS, SUBCLASS:
359 for a backdraft preventer biased to a particular
position by a naturally occurring force such as gravity.
Subclass:
361
Internal damper:
This subclass is indented under subclass 358. Subject matter
wherein the air exhausting means includes an easily shiftable
air permitting or preventing inner body which is configured
such that it remains completely within the confines of the
air exhausting means in all of its shifted positions.
Subclass:
362
Continuously horizontal damper panel:
This subclass is indented under subclass 361. Subject matter
wherein the air permitting or preventing inner body is an air
engaging and controlling plate which is always maintained in
a position parallel to the horizon while motion is being
imparted to it and while it is being used.
SEE OR SEARCH THIS CLASS, SUBCLASS:
29 for chimneytop or stacktop structure having a
continuously horizontal damper panel which is readily movable
to regulate an air current.
348 for an outlet airway having an air pump and a
continuously horizontal damper panel.
Subclass:
363
Pivoted damper panel:
This subclass is indented under subclass 361. Subject matter
wherein the air permitting or preventing inner body is an air
engaging and controlling plate which may be swung about a
fixed axis region which is parallel to or within the plane of
the plate.
SEE OR SEARCH THIS CLASS, SUBCLASS:
5 for pivoted chimney or stacktop cap closures.
30 for a pivoted outlet air current regulator used in a
chimney or stacktop.
subclasses 325+ for pivoted blades used as an internal
damper in an inlet airway having a specific air distributor.
327 for an internal valve which pivots in an upstream
direction included in an inlet airway having a specific air
distributor.
subclasses 335+ for other pivoted damper panels used in an
inlet airway
Subclass:
364
Along roof ridge:
This subclass is indented under subclass 358. Subject matter
wherein the air exhausting means is formed (1) longitudinally
of and (2) for cooperating with or aid in making up a roof
crest of two converging, slanted, exterior top structural
barriers, i.e., roof surfaces of the ventilated space.
(1) Note. Roof ridge ventilators which do not have their
longest horizontal dimension along the roof ridge are not
considered proper for this subclass.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 341+ for an outlet airway which may be along a
roof ridge and includes an air pump to move the air.
365 for a roof ridge ventilator not having a readily movable
air regulating louver, damper, or cover.
Subclass:
365
Along roof ridge:
This subclass is indented under subclass 339. Subject matter
wherein the air exhausting means is formed (1) longitudinally
of and (2) for cooperating with or aid in making up a roof
crest of two converging, slanted, exterior top structural
barriers, i.e., roof surfaces of the ventilated space.
(1) Note. Roof ridge ventilators which do not have their
longest horizontal dimension along the roof ridge are not
considered proper for this subclass.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 341+ for an outlet airway which may be along a
roof ridge and includes an air pump to move the air.
364 for a roof ridge ventilator having a readily movable air
regulating louver, damper, or cover.
Subclass:
366
Slant roof ventilator:
This subclass is indented under subclass 339. Subject matter
wherein the air exhausting means is specifically adapted to
cooperate with a single, sloped surface of an exterior top
structural barrier, i.e., a roof of the ventilated space.
(1) Note. A roof ventilator which is disclosed as being
capable of being mounted on a sloped roof but absent any
specific claimed feature for cooperating with a sloped roof,
e.g., a sloped cap or wall, is not considered proper for
original patent placement in this subclass.
Subclass:
367
Having specific cover or shield for exterior vent opening:
This subclass is indented under subclass 4560. Subject matter
wherein particular significance is attributed to a means
positioned over an outdoor aperture of an air passage leading
to the ventilated space so as to protect the air passage.
(1) Note. The means usually acts to protect the passage from
rain or outside debris.
(2) Note. A cover or shield not inherent to the structure of
the ventilating means (e.g., a building roof overhang) is not
included under this definition.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 4+ for a cap closure for a chimney or stacktop.
94 for a railcar, bus, or trailer having an exterior cap
closure for a vent.
275 for an inlet airway having a specific cover or shield
for an exterior vent opening.
subclasses 347+ for an outlet airway having an air pump and
which may include a readily moveable cover.
355 for an outlet airway having an air pump and including a
moveable access cover.
356 for an outlet airway having an air pump and including an
exterior neck with an enlarged, weather resistant cover.
subclasses 358+ for other outlet airways which may include
a readily moveable cover.
Subclass:
368
Exterior neck with enlarged, weather resistant cover:
This subclass is indented under subclass 367. Subject matter
wherein the air exhausting means includes an outdoor portion
with an upstanding air passage stem connected to an end cap
or shelter which (1) has a larger dimension than the stem in
a direction transverse to the direction of airflow through an
exterior structural barrier, i.e., a wall or roof of the
ventilated space and (2) assists in diminishing the
deleterious effects of weather conditions.
SEE OR SEARCH THIS CLASS, SUBCLASS:
356 for an outlet airway having an exterior neck with an
enlarged, weather resistant cover and an air pump.
Subclass:
369
FIRE DAMPERS:
This subclass is indented under the class definition. Subject
matter including valve means which act to shut off flow in a
ventilating system in the event of a dramatic rise in
temperature indicative of a fire.
(1) Note. These dampers are usually activated by fusible
links, a portion of which melts due to the elevated
temperatures incurred in a fire.
(2) Note. Many building codes require the use of fire
dampers to prevent the spread of the fire through the
ventilating system.
SEE OR SEARCH THIS CLASS, SUBCLASS:
28 for a chimney or stacktop with air current regulating
means which is temperature responsive.
257 for a building inlet airway including an emergency smoke
or fire responsive valve.
342 for a building outlet airway including an air pump and
having means for controlling or dealing with smoke.
357 for other building outlet airways having means for
controlling or dealing with smoke.
SEE OR SEARCH CLASS:
126, Stoves and Furnaces, subclass 287.5 for fusible release
dampers for stoves or furnaces.
169, Fire Extinguishers, particularly subclass 42 and 56+
for fire extinguishing apparatus responsive to smoke or
fire.
Subclass:
370
MISCELLANEOUS:
This subclass is indented under the class definition. Subject
matter not provided for in the above subclasses.
CROSS-REFERENCE ART COLLECTIONS
Subclass:
900
VENTILATOR USING SOLAR POWER:
This subclass is indented under the class definition. Subject
matter comprising means using energy from the sun in its
operation.
Subclass:
901
FOG DISPELLER:
This subclass is indented under the class definition. Subject
matter comprising means for eliminating or dispersing
cloud-like, condensed water vapor which is positioned close
to a ground surface.
SEE OR SEARCH CLASS:
239, Fluid Sprinkling, Spraying, and Diffusing, subclass 2.1
for processes of weather control and subclass 14.1 for
apparatus used in weather control.
516, Colloid Systems and Wetting Agents; Subcombinations
Thereof; Processes of Making, Stabilizing, Breaking, or
Inhibiting, subclass 114 for compositions for or
subcombination compositions for or breaking of or inhibiting
of continuous gas or vapor phase colloid systems (e.g., fog
dispelling, dust suppressing, contrail suppressing), when
generically claimed or when there is no hierarchically
superior provision in the USPC for the specifically claimed
art.
Subclass:
902
AIR RAID SHELTER VENTILATION:
This subclass is indented under the class definition. Subject
matter comprising means to ventilate a space which is
intended to protect its occupants from an attack by hostile
military aircraft or missiles.
Subclass:
903
FLEXIBLE DUCTS USED FOR CARRYING AIR:
This subclass is indented under the class definition. Subject
matter comprising a conduit for guiding air to or from a
ventilated space which is constructed to undergo bending,
twisting, or turning without breakage.
Subclass:
904
MAGNETIC MEANS TO HOLD A DAMPER CLOSED:
This subclass is indented under the class definition. Subject
matter comprising a means for permitting or preventing
airflow and further comprising means using magnetic force to
maintain in position the airflow permitting or preventing
means so as to prevent airflow.
Subclass:
905
BLACK OUT MEANS:
This subclass is indented under the class definition. Subject
matter comprising means for passing air therethrough to or
from a ventilated space while blocking the passage of light.
Subclass:
906
NOISE INHIBITING MEANS:
This subclass is indented under the class definition. Subject
matter comprising means which prevents or deadens unwanted
sound.
(1) Note. For the line between Class 454 and other classes,
see the Search Notes below.
SEE OR SEARCH THIS CLASS, SUBCLASS:
206 for a window mounted air pump including specific noise
inhibiting structure.
262 for an inlet airway, including structure for mixing
plural airstreams together, which has specific noise
inhibiting structure.
346 for an outlet airway having vibration absorbing or
preventing structure.
SEE OR SEARCH CLASS:
181, Acoustics, appropriate subclasses. Note particularly
subclasses 212+ for a fluid-conducting-type sound muffler
of a general nature, and see the (1) Note to subclass 212 for
lines with this class (454); and subclass 224 for a sound
absorbing ventilating duct.
Subclass:
907
SEAT:
This subclass is indented under the class definition. Subject
matter combined with a means for supporting a person in a
sitting position.
SEE OR SEARCH THIS CLASS, SUBCLASS:
120 for seat structure for ventilating a space in a
vehicle.
Subclass:
908
HAVING ROTARY RETARDER:
This subclass is indented under the class definition. Subject
matter comprising a means in the path of air flowing to or
from a ventilated space which is made to revolve about an
axis by the airflow.
(1) Note. The means must revolve at least 360 degrees to be
included in this art collection.
Subclass:
909
RADON PREVENTION:
This subclass is indented under the class definition. Subject
matter comprising means for evacuating or preventing radon
from collecting in a ventilated space.
(1) Note. The ventilated space usually is positioned at
least partially below ground level.
Information Products Division -- Contacts
Questions regarding this report should be directed to:
U.S. Patent and Trademark Office
Information Products Division
PK3- Suite 441
Washington, DC 20231
tel: (703) 306-2600
FAX: (703) 306-2737
email: oeip@uspto.gov
Last Modified: 6 October 2000