U.S. PATENT AND TRADEMARK OFFICE
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U.S. Patent Classification System - Classification Definitions
as of June 30, 2000
Patents classified in a subclass may be accessed by either clicking on
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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 251
VALVES AND VALVE ACTUATION
Class Definition:
This class provides for means, for regulating flow of a fluid
through a passage, either by closing the passage or
restricting it by a definite predetermined motion of the
closing-element, that are of general application not
otherwise provided for.
LINES WITH OTHER CLASSES AND WITHIN THIS CLASS
A valve is distinguished from a closure of the cap type by
being shiftable between open and closed position in the
device rather than bodily removable from it, but pivoted
closures and many pivoted valves have no definable
difference. For this reason, closures associated with valves
have been grouped with plural valves in certain parts of
Class 137, Fluid Handling.
See the Class Definition of Class 137, Fluid Handling,
References to Other Classes, for collected search notes on
automatic valves, plural valves and their actuators, and
manual valve actuation, selection, and/or adjusting.
REFERENCES TO OTHER CLASSES
SEE OR SEARCH CLASS:
4, Baths, Closets, Sinks, and Spittoons, for valves combined
with devices of that class, and for valves specialized for
use in such devices.
16, Miscellaneous Hardware, subclass 117 for insulated
handles adapted for general use on rotary stems.
29, Metal Working, 888.4 and 890.12+ for processes of making
valves and valve seats.
48, Gas: Heating and Illuminating, subclass 58 for valves
for acetylene generators.
49, Movable or Removable Closures, appropriate subclasses for
closures of the type provided for and see the search notes
thereto in References to Other Classes for the loci of
closures in other classes.
62, Refrigeration, appropriate subclasses, for a
refrigeration producer including an expansion valve
specialized to such purpose, particularly 204, 210+, 216, and
528.
70, Locks, 175 and 242+ for lock mechanisms for valves where
no particular structure of the valve beyond accommodation of
the lock is involved.
73, Measuring and Testing, subclass 179, 203, 220, 221, 249,
265+, 268+, 271, and 276 for valve organizations associated
with major devices.
84, Music, the various "pneumatic" and wind instruments, for
valves specialized for such devices.
91, Motors: Expansible Chamber Type, appropriate subclasses
for valves combined with expansible chamber motors, the valve
acting as a control for the motive fluid for the motor.
110, Furnaces, appropriate subclasses, for valve
organizations associated with furnaces.
114, Ships, subclass 197 and 198, for boat plugs and sea
cocks.
116, Signals and Indicators, 67 for valves in combination
with alarms, and subclass 277, for valve position
indicators.
122, Liquid Heaters and Vaporizers, subclass 437, 451.2, and
507 for valves associated with liquid heaters and
vaporizers.
123, Internal-Combustion Engines, 90.1 and 188.1+ for valves
peculiar to internal-combustion engines.
126, Stoves and Furnaces, 285 for dampers.
128, Surgery, subclass 207, 210 and 211, for valved
inhalers.
137, Fluid Handling, for fluid handling apparatus and
processes not otherwise provided for including combinations
with valves, certain special types of valves with or without
actuators, and valves with complex actuators; 38 for valves
operated by change of position or inertia of the system;
subclasses 47+ for speed responsive valve control; subclasses
67+ for flow control by destructible or deformable means;
subclasses 171+ for fluid separating valves in diverse fluid
containing pressure systems; subclasses 233+ for valves for
inflatable articles such as tires; subclasses 243+ for valve
grinding motion of valves on seats; subclasses 246+ for
lubrication or liquid supplied at the valve interface;
subclasses 247+ for liquid valves and liquid trap seals;
subclasses 269+ for valves convertible to change the mode of
operation; subclasses 272+ for hydrant valves; subclasses
309+ for regenerative furnace type reversing valves;
subclasses 329.1+ for repair check valves; subclasses 382+
for valve guards; subclasses 383+ for valves with locks or
seals; subclasses 386+ especially subclasses 397, 398+ and
409+ for float controlled valves; subclasses 454.2+ for
removable valve head and seat units, see the search notes
thereto; subclasses 455+ for line condition change responsive
valves, such as safety valves, pressure regulators and check
valves; subclasses 544+ for valves with filters or strainers;
subclasses 551+ for valves with indicators, registers,
recorders, alarms or inspection means; subclass 560 for
valves combined with other structure; subclasses 561+ for
fluid handling systems including valves, particularly
subclasses 615+ for valves actuated by swinging spouts and
subclasses 625+ for multiway valve units; subclasses 624.11+
for a distribution system including a programmer or a timer.
138, Pipes and Tubular Conduits, 40 for similar structure
where the flow is not cut off entirely, subclasses 89+ for
nonvalve closures and plugs for conduits, especially
subclasses 94.3+ for line blinds, and see (1) Note thereunder
for the line.
141, Fluent Material Handling, With Receiver or Receiver
Coacting Means, appropriate subclasses for valved filling
devices.
152, Resilient Tires and Wheels, 415 for inflating devices,
for pneumatic tires.
166, Wells, subclass 97.1 for a valve on a cap or wellhead,
and subclasses 316+ for below-ground well devices with
valves.
169, Fire Extinguishers, 19 for valves associated with
sprinkler systems designed to extinguish fires.
177, Weighing Scales, 60 for weigher responsive flow
control.
184, Lubrication, for lubricating devices with valves,
particularly subclasses 33-35 for pump lubricators with
valves, subclasses 66+ for gravity feed type lubricators with
automatic valves and subclasses 80, 82, 83, 86, and 87 for
other gravity feed lubricators with valves.
193, Conveyors, Chutes, Skids, Guides, and Ways, subclass 20,
21, 28, 31+, 32, and 39 for devices controlling the flow of
chutes.
200, Electricity: Circuit Makers and Breakers, subclass
61.86 for valve operators, manipulation of which
additionally makes or breaks a circuit, and subclasses 81.9+
for flow responsive devices which control elements of a
switch.
202, Distillation: Apparatus, 255 for valves specialized to
distillation.
209, Classifying, Separating, and Assorting Solids, for valve
combinations, particularly subclass 246, for sifter feeding
hoppers with cut-offs and valves, subclass 258, for
discharging valves for sifters, and subclasses 488+, 490+ and
497+, for feeding and discharging means for stratifiers.
210, Liquid Purification or Separation, appropriate
subclasses for various combinations of a valve and separator,
particularly subclass 92, 97+, 181, 245, 277+, 313, 340, 362,
392, 395+, and 418+.
215, Bottles and Jars, 17 for valved closures having
features to prevent refilling of the receptacle and
subclasses 311+ for other valved closures.
217, Wooden Receptacles, 99 for valved barrel bungs.
220, Receptacles, 200 for closures adapted to remain in the
articles with which they are associated, and see the notes
thereto for closures, and subclass 86.1 for milking pails
with a valved inlet.
222, Dispensing, for valves, cut-offs and discharge
controllers in dispensing combinations, as where (a) the
structural features of a supply container with or without
material guiding means or the relation of the valve or its
actuator thereto is claimed, (b) a dispensing type discharge
assistant is claimed in combination with a valve, cut-off or
discharge controller, (c) a preset or automatic cut-off is
controlled by dispensed volume or rate of flow, (d) plural
valves are so related as to have a measuring function, (e) or
the valve, cut-off or discharge controller is considered to
be specially adapted for dispensing purposes, as those
operated by pressure applied to the contents of the supply
container or by inversion of the supply container.
235, Registers, subclass 94, for devices for registering the
number of times a valve is operated.
236, Automatic Temperature and Humidity Regulation, for
thermostatically-controlled valves.
239, Fluid Sprinkling, Spraying, and Diffusing, subclass 87,
93+, 95, 96, 537+, and 569+ for valves in nozzles.
250, Radiant Energy, 229 for prephotocell light valves.
261, Gas and Liquid Contact Apparatus, for valves associated
with special contact apparatus.
303, Fluid-Pressure and Analogous Brake System, 54 for
self-lapping valves and subclass 84.1+ for flow retarders and
cut-offs.
359, Optics: Systems (Including Communication) and Elements,
227 and 238+ for light valves.
361, Electricity: Electrical Systems and Devices, 254 for
gas-controlled valves operated by magnets, utilized in
igniting means.
383, Flexible Bags, 44 for the combination of a bag with a
valve-type closure.
401, Coating Implements With Material Supply, appropriate
subclasses, see particularly, subclass 36, 40+, 45+, 135,
136, 204, 205+, 219+, 232+, 258+, 263+, 270+.
406, Conveyors: Fluid Current, 124 for valves between
plural receptacles in series at the conveyor inlet; and
subclasses 127+ for valves between a conveyor and a material
feeding receptacle.
454, Ventilation, 265, 322+ and 333+ for valves associated
with ventilating means.
604, Surgery, subclasses 32-34, 236 to 238, 248 to 250 and
256.
D23, Environmental Heating and Cooling, Fluid Handling and
Sanitary Equipment, 200 for fluid handling or treatment
equipment and subclasses 233+ for valves.
SUBCLASSES
Subclass:
1.1
BLOW-OUT PREVENTERS (I.E., COOPERATING SEGMENTS OF ANNULUS:
This subclass is indented under the class definition.
Subject matter comprising a plurality of relatively movable
flow obstructing members which control an annular flow
passage about an axial rod or pipe as between a well casing
and drill stem and have characteristics which go beyond a
mere sealing means.
SEE OR SEARCH THIS CLASS, SUBCLASS:
146 for valves and/or couplings made in sections to
facilitate mounting on continuous conduits.
SEE OR SEARCH CLASS:
166, Wells, 75.11, especially subclasses 86.1+ and 88.1 for
well heads comprising blow-out preventers and additional
means for handling fluid from the well or other specific well
features, and subclasses 179+ and the subclasses there noted
for packers or plugs inserted into a prepositioned well
conduit.
222, Dispensing, 502 for sectional valves in dispensers.
227, Elongated-Member-Driving Apparatus, appropriate
subclasses, for a packing between a casing head and an inner
pipe or rod particularly subclass 4 for a pipe end attached
packing assembly, subclasses 5+ for a packing between a
casing head and a longitudinally moving coupled rod, and
subclass 31 for a rotatable packing for an axially moving
rod.
277, Seal for a Joint or Juncture, for a generic sealing
means or process, 324 for a seal for well apparatus having
an overpressure control device that may include extrusion
preventing (i.e., anti-extrusion) structure.
285, Pipe Joints or Couplings, subclass 123.14 for joints
between concentric stationary pipes (e.g., and packing type
blow-out preventer between a well casing head and a tubing).
Subclass:
1.2
Deformable annulus:
This subclass is indented under subclass 1.1. Subject matter
wherein one of the flow obstructing members comprises an
annular member capable of having its shape changed by
application of a force to thereby control flow through the
annular flow passage.
Subclass:
1.3
Radial reciprocating ram:
This subclass is indented under subclass 1. Subject matter
.l which includes a member mounted for reciprocation in a
radial direction to exert and relieve pressure on one of the
flow obstructing members to open and close the annular flow
passage.
Subclass:
3
This subclass is indented under the class definition.
Subject matter wherein the valve is provided with an actuator
including a tracer element which is designed to contact a
pattern.
(1) Note. This type of actuation is usually used in
duplicating machines wherein the pattern is the shape of the
article to be made and the valve is the control
subcombination of the duplicating machine.
SEE OR SEARCH CLASS:
91, Motors: Expansible Chamber Type, subclass 37 for
expansible chamber motors controlled by a pattern or template
controlled valve.
409, Gear Cutting, Milling, or Planing, 79 for a pattern
controlled milling machine.
Subclass:
4
This subclass is indented under the class definition.
Devices which control flow by compression of a flexible fluid
conveying tube.
SEE OR SEARCH CLASS:
24, Buckles, Buttons, Clasps, etc., 129 to 136+ for similar
structures for clamping or holding cords or ropes, and
subclasses 243+ for clasps of general utility.
81, Tools, 300 for pliers and subclasses 53+ for wrenches.
137, Fluid Handling, 355.18 for tube compressors combined
with hose storage or retrieval means.
Subclass:
5
This subclass is indented under subclass 4. Devices which
are actuated by fluid pressure.
Subclass:
6
This subclass is indented under subclass 4. Devices
comprising rollers which contact and compress the conveyor.
Subclass:
7
This subclass is indented under subclass 4. Devices
comprising a tube contacting portion which reciprocates
perpendicularly of the axis of the flexible conveyor.
Subclass:
8
This subclass is indented under subclass 7. Devices having
screw means to actuate the contacting portion.
Subclass:
9
This subclass is indented under subclass 4. Devices
comprising a tube contacting portion which pivots, as a
lever, to compress the conveyor.
Subclass:
10
This subclass is indented under subclass 9. Devices
comprising a U-shaped resilient bar or rod which pivots at
its base to cause the leg portions to grasp the tube.
Subclass:
11
This subclass is indented under the class definition.
Subject matter wherein the valve is provided with a device
which converts heat energy into motive power or in which
energy from a variation in buoyancy of a body is used to
actuate the valve.
(1) Note. An example of a buoyancy motor is a hollow shell
which when full of liquid sinks in the liquid but which
floats when the liquid is pumped out of the shell.
SEE OR SEARCH CLASS:
60, Power Plants, 495 for motors having a buoyant working
member motivated by the vertical rise and fall of the surface
of a body of fluid, and subclasses 508+ or 516+ for motors
which transduce temperature variation to work through the
expansion or contraction of a confined solid, liquid or gas.
137, Fluid Handling, subclass 76 for heating means for heat
destructible or fusible control elements, subclasses 334+ for
means for supplying or exchanging heat in fluid handling
means, especially subclass 341 for electric heating elements
and see the search notes to subclass 334, subclasses 386+,
and the subclasses mentioned in the notes thereto, especially
subclass 404 for sinking or bucket type floats and subclass
409, for float actuated, liquid level responsive valves, and
see the search notes to subclass 404 and subclass 468 for
temperature responsive means controlling valves, and see the
search notes thereto.
Subclass:
12
This subclass is indented under the class definition.
Subject matter in which the opening or closing movement of
the valve is produced or modified by the reactive force of a
fluid acting against a portion of the actuating means.
(1) Note. All fluid displacement devices inherently require
a period of time to fill or empty the same, the period
depending upon the relative sizes of the displacement devices
and the flow passages thereto as well as the pressures
producing the flow. As a result, many of the disclosures of
this and indented subclasses disclose and make use of this
time delay, such as in the case of the "flush" valves, but
other disclosures having equivalent constructions make no
reference to such time delay. The definitions of this and
indented subclasses have been drawn with a view to bring
together inherently related disclosures irrespective of the
mode of describing the function of the device.
SEE OR SEARCH THIS CLASS, SUBCLASS:
73 for biased trip valves with fluid pressure actuation of
the trip.
SEE OR SEARCH CLASS:
92, Expansible Chamber Devices, appropriate subclasses for an
expansible chamber device, per se.
123, Internal-Combustion Engines, subclass 90.12 thru 90.14,
for poppet valve operating mechanism which is fluid
actuated.
137, Fluid Handling, subclass 12 for a process of
controlling flow by fluid pressure, subclass 14 for a process
involving pressure control, subclass 15.18 for a process of
assembling, disassembling, or repairing a fluid actuated or
retarded valve, subclass 58 for a centrifugal mass type
(i.e., exclusive of liquid) speed responsive valve control
having a fluid servomotor, subclass 81.1 for an atmospheric
pressure responsive control, subclasses 82-86 for pressure
modulating relay or follower, subclass 105 for a supply and
exhaust type self-proportioning or correlating vacuum suction
pulsator type system (e.g., milking machine, etc.) using a
pulsation responsive pilot valve, subclasses 219-222 for
Laner-Johnson valves, especially subclasses 221-222 for those
having an internal servomotor with an internal pilot valve,
subclasses 413-415 for fluid pressure type servo relay
control of or response to liquid level and subclasses
455-543.23 for valves responding to change in line pressure
and/or flow conditions to control the flow, especially
subclasses 488-492.5 for fluid pressure type servomotor
control of the valve, subclasses 596.14-596.16 for pilot
actuated supply and exhaust valves, subclass 596.18 for a
fluid motor actuated supply and exhaust valves, subclass
601.13 for systems dividing into parallel flow lines then
recombining having a fluid actuated or retarded valve,
subclass 625.6 for pilot actuated supply and exhaust multi
way valve units, or subclass 625.66 for fluid motor actuated
supply and exhaust multi way valve unit.
222, Dispensing, 59 for dispensers having flow meter
operated cut-offs, subclass 334 for fluid motor operated
discharge assistants in dispensers and subclass 504 for motor
operated dispenser outlet elements.
Subclass:
14
This subclass is indented under subclass 12. Subject matter
in which both a fluid actuator and an actuator other than one
utilizing fluid are provided for alternative use.
(1) Note. Actuators which include both fluid actuation
mechanism and nonfluid actuation mechanism but in which said
mechanisms are not of themselves each capable of fully
controlling the valve are not considered to be alternative
within the scope of this subclass and are classified in an
appropriate subclass for the fluid actuation mechanism and
cross referenced for novel nonfluid actuation mechanism.
Examples of such excluded devices are electrically controlled
pilot valves in subclass 30 and manually opened and fluid
pressure closed valves in subclasses 48+.
SEE OR SEARCH THIS CLASS, SUBCLASS:
30 for electrically controlled fluid actuators, and see (1)
Note.
48 for manually opened, fluid pressure closed valves and see
(1) note.
130 for electrical actuators combined with a nonfluid,
nonelectrical actuator.
Subclass:
15
This subclass is indented under subclass 12. Subject matter
in which the flow of fluid, when established by external
means under the control of the operator, is stopped after an
interval of time irrespective of the continued application by
the operator of the original control effect that initiated
the flow.
SEE OR SEARCH THIS CLASS, SUBCLASS:
48 for fluid actuated devices which delay closing but are
not effective until the external control is released.
SEE OR SEARCH CLASS:
137, Fluid Handling, 386 for control by liquid level
responsive means, i.e., by accumulated quantities in a
container or a control chamber which reflects the condition
in the container and subclasses 456+ for safety cut-offs
which require manual resetting.
222, Dispensing, 14 for dispenser cut-offs operated by
selectively preset volume or rate of flow responsive
mechanism, and subclasses 59+ for dispenser cut-offs operated
by rate of flow responsive mechanism.
Subclass:
16
This subclass is indented under subclass 15. Subject matter
in which a manually controlled valve and a fluid actuated or
retarded shut-off valve are sequentially arranged in the flow
line so that flow takes place only during the time both
valves are open.
(1) Note. The shut-off valve is usually a safety or loss
preventing valve intended to prevent prolonged use of the
fluid under external control or loss in case of rupture of a
hydraulic line. They are frequently called hydraulic fuses.
(2) Note. Since these valves are reset only by operation of
the manual valve they are included here even if claimed as a
subcombination.
SEE OR SEARCH CLASS:
137, Fluid Handling, 102 for devices, sometimes called
"hydraulic fuses", in which flow between a pump and
distributor valve is interrupted after an interval unless
exhaust flow from the distributor valve to the reservoir
occurs; subclass 467 for valves which open in response to a
change in line condition and require resetting, and
subclasses 613+ for distributing systems comprising a single
flow path with plural serial valves and/or closures.
Subclass:
17
This subclass is indented under subclass 16. Subject matter
in which the manual and fluid actuated or retarded valve are
conjointly actuated at least during a portion of their
motions.
(1) Note. In some disclosures in this subclass, one valve
is manual only and one is opened manually and closed or
retarded by fluid pressure means, and the first valve
prevents flow during the manual opening of the second or
fluid actuated valve and opens only when the fluid actuated
or retarded valve has started its closing motion.
Subclass:
18
This subclass is indented under subclass 17. Subject matter
in which the fluid actuated or retarded valve is controlled
by a pilot valve that is interconnected with and moved by the
manual valve.
SEE OR SEARCH THIS CLASS, SUBCLASS:
25 for fluid servo-motor actuated valves, and see the search
notes to subclass 25.
Subclass:
19
This subclass is indented under subclass 15. Subject matter
in which the main valve is opened by adjustment of a control
or pilot valve in a servo actuating system for the main valve
but is caused to start closing by a second control or pilot
valve made effective by the opening of the main valve,
irrespective of the adjustment of the first pilot valve.
SEE OR SEARCH THIS CLASS, SUBCLASS:
29 for fluid actuated pilot valves with additional pilot
valve control.
Subclass:
20
This subclass is indented under subclass 15. Subject matter
in which the actuator which opens the valve is subjected to
an overriding closing force by a fluid actuated or retarded
device only after the completion of the desired flow period.
SEE OR SEARCH CLASS:
222, Dispensing, 17 for preset volume dispensers in which a
moving cut-off operating element returns to its neutral
setting during dispensing.
Subclass:
21
This subclass is indented under subclass 15. Subject matter
in which coacting elements of the external actuating means
for the valve are so related to each other that they transmit
an opening motion to the valve, but upon the valve attaining
its open position the co-acting elements are sufficiently
disengaged as to permit the valve reclosing under the action
of the fluid actuating or retarding means even if the opening
force on the external means is maintained.
Subclass:
22
This subclass is indented under subclass 15. Subject matter
in which a control pressure normally maintaining the valve
closed is momentarily reduced, so that the valve can open, by
discharge into an empty closed chamber, but upon the
subsequent rise in pressure, due to filling of the chamber,
the valve recloses.
SEE OR SEARCH THIS CLASS, SUBCLASS:
33 for choked pressure fluid type servo-motors in which the
discharge of the fluid in the choke chamber is to waste or to
the line, the flow being terminated by reverse movement of
the pilot valve.
Subclass:
23
This subclass is indented under subclass 15. Subject matter
in which a valve biased toward its closed position is opened
by a force transmitted through a trapped body of fluid in a
chamber having a restricted inflow or outflow opening and
recloses under its bias when sufficient flow through the
restricted opening has taken place.
SEE OR SEARCH THIS CLASS, SUBCLASS:
57 for fluid link or column actuators for valves.
Subclass:
24
This subclass is indented under subclass 12. Subject matter
in which the valve has the opening or closing forces acting
thereon augmented or altered by a force resulting from a
fluid pressure derived from the velocity flow of fluid in the
line acting on a reactor surface other than the valve head or
closure element.
SEE OR SEARCH THIS CLASS, SUBCLASS:
37 for choked fluid pressure type servo-motors having a
choke or restriction in the main line.
123 for valves located at a point of restriction in a line.
SEE OR SEARCH CLASS:
137, Fluid Handling, 219 for Larner-Johnson valves, in which
the needle seats on a restricted portion of the flow line and
subclasses 497+ for valves having a separate connected fluid
reactor surface and adjusted entirely by variations in fluid
flow in the line, especially subclass 502 for expansible
chamber reactors subject to differential pressures, one
pressure being that at the throat of a Venturi tube.
Subclass:
25
This subclass is indented under subclass 12. Subject matter
in which the valve is actuated, at least in part, by a fluid
pressure motive means deriving its power from either the
fluid line or a separate source of fluid pressure and
controlled by an auxiliary or pilot valve or valves.
(1) Note. Fluid pressure servo-motors having valves both
for the inlet and the outlet or vent of the pressure chamber
are in this subclass.
SEE OR SEARCH CLASS:
91, Motors: Expansible Chamber Type, appropriate subclasses
for expansible chamber motors, per se.
137, Fluid Handling, subclass 46 for inertia responsive
systems having servo mechanisms, subclass 58 for centrifugal
governor controlled servo actuated valves, subclasses 82+ for
pressure modulating relays or followers, subclass 105 for
pulsators with pulsation responsive pilot valve, subclasses
191 and 195 for gas and liquid separating traps having
servo-control of the valves, subclasses 219+, especially
subclass 222 for Larner-Johnson type valves having hollow
telescoping sections which function as servo units,
subclasses 413+ for fluid pressure servo-motor operation of a
level responsive valve, subclasses 485+ for servo-operated
line condition responsive valves, and subclasses 596.14+ for
pilot actuated supply and exhaust valves, and subclasses
625.6+ for pilot actuated supply and exhaust multiway valve
units.
Subclass:
26
This subclass is indented under subclass 25. Subject matter
in which the servo-motor may receive fluid from any one of
two or more sources of fluid pressure or in which two or more
pilot valves are employed for a single servo unit, one pilot
valve duplicating the function of another pilot valve.
SEE OR SEARCH THIS CLASS, SUBCLASS:
19 for servo-systems having an additional pilot valve which
compels reclosing of the main valve irrespective of the
position of the first pilot valve.
25 for servo-systems in which there are two or more pilot
valves not duplicative of their functions and not
classifiable in subclasses 29 and 31, such as inlet and
outlet valves.
29 for pilot valves controlling fluid flow to a fluid
actuated pilot valve.
31 for servo-systems in which a plurality of pilot valves
control a corresponding number of servo units.
SEE OR SEARCH CLASS:
137, Fluid Handling, 65 for plural servo-motor control
valves in a speed responsive prime mover control.
Subclass:
27
This subclass is indented under subclass 25. Subject matter
in which means are provided for causing the main valve to
assume a position other than biased open or biased closed
upon a loss of servo operating pressure, i.e., a position
other than that which the uncontrolled valve would assume
under pressure of the material flowing through the line.
Subclass:
28
This subclass is indented under subclass 25. Subject matter
in which the auxiliary or pilot valve controlling the main
valve is operated by a fluid responsive device.
SEE OR SEARCH THIS CLASS, SUBCLASS:
32 for latched pilot valves for fluid servo-motors with
fluid pressure means to release the latch.
SEE OR SEARCH CLASS:
137, Fluid Handling, subclass 105 for such systems in which
the pilot valve is itself controlled by the main valve.
These are generally suction operated milker pulsators and
subclasses 485+ for line condition change responsive valves
having fluid actuated pilot valve means which responds to
changing pressures or flow conditions in the line.
Subclass:
29
This subclass is indented under subclass 28. Subject matter
in which the fluid responsive device that operates the pilot
valve is controlled by an additional pilot valve.
SEE OR SEARCH THIS CLASS, SUBCLASS:
26 for plural alternative pilot valves, and see the search
notes on plural pilot valves in the definition.
Subclass:
30.01
Electrically actuated pilot valve:
This subclass is indented under subclass 25. Subject matter
in which the auxiliary or pilot valve controlling the valve
is operated by electrical energy.
SEE OR SEARCH THIS CLASS, SUBCLASS:
32 for electrically released trip pilot valves.
129.01 for electrical actuators for main valves, and see the
search notes to subclass 129.
SEE OR SEARCH CLASS:
137, Fluid Handling, subclass 315.03 for a fluid handling
system with repair, tapping, or assembly means for an
electromagnetically actuated valve (e.g., solenoid, etc.),
subclass 596.16 for systems having an electrically actuated
pilot valve for a supply and exhaust valve, subclass 599.07
for systems having separately actuated valves operated in
common by an electrically actuated digital flow controller
and their flow lines, subclass 601.14 for systems dividing
into parallel flow lines then recombining having an
electrical valve actuator, or subclass 625.64 for system
shaving an electrically actuated pilot valve for a supply and
exhaust multi way valve unit.
Subclass:
30.02
Main valve biased closed by fluid pressure:
This subclass is indented under subclass 30.01. Subject
matter in which force per unit area exerted by a fluent
material is used to maintain the valve in a position which
closes a passage to fluid flow until the valve actuator moves
for valve to a position which opens the passage.
Subclass:
30.03
Venting passage within movable main valve:
This subclass is indented under subclass 30.02. Subject
matter in which the valve is opened by releasing pressure
through a passageway in a movable portion of the valve.
Subclass:
30.04
Pilot valve movably mounted within or around main valve:
This subclass is indented under subclass 30.03. Subject
matter in which movement of the pilot valve is limited by the
movable portion of the main valve, the pilot valve being
either contained or guided by the movable portion of the main
valve.
Subclass:
30.05
Fluid pressure sole means for biasing valve closed:
This subclass is indented under subclass 30.02. Subject
matter in which the force per unit area exerted by a fluent
material is the only agent used to maintain the main valve in
the position.
Subclass:
31
This subclass is indented under subclass 25. Subject matter
in which the main valve is operated in one direction by a
servo unit and another direction by a second servo unit.
(1) Note. The oppositely acting servo units of this
subclass may constitute different sides of the same piston
and further the pilot controls for the opposing servo units
may be utilized, as in a single reversing or four-way valve.
SEE OR SEARCH CLASS:
91, Motors: Expansible Chamber Type, appropriate subclasses
for servo-motors, per se.
137, Fluid Handling, subclass 596.15 for supply and exhaust
valves operated by plural servo-motors controlled by a single
pilot valve, and subclass 625.63 for supply and exhaust
multiway valve units operated by plural servo-motors
controlled by a single pilot valve.
Subclass:
32
This subclass is indented under subclass 25. Subject matter
in which the pilot valve is engaged in one position by a
detent which retains the pilot valve in that position until
released by the detent.
SEE OR SEARCH THIS CLASS, SUBCLASS:
66 for biased trip valves, especially subclass 73 for fluid
pressure trip actuation.
89 for valve actuators associated with means for blocking or
disabling the actuator.
Subclass:
33
This subclass is indented under subclass 25. Subject matter
in which the servo-motor is of the type having an expansible
pressure chamber the pressure in which is equalized with
either a high or a low pressure region by means of a
constantly open but restricted passage or communication
therebetween to cause the main valve to assume one position,
but in which the pressure conditions can be reversed by the
opening of a pilot valve in an open or less restricted
passage between the chamber and a pressure region other than
that connected by the restricted passage to cause the main
valve to assume an opposite position.
(1) Note. Expansible chamber devices which are constantly
open to a single pressure region, even though the opening is
restricted, are not servo-motors because motor action can
result only by receiving fluid at a higher pressure and
exhausting to a lower pressure. Such devices are either a
form of fluid bias or a dashpot or other vented chamber.
SEE OR SEARCH THIS CLASS, SUBCLASS:
50 for dashpot of fluid controlled retarders or timers
receiving pressure from the line controlled. See (1) Note.
SEE OR SEARCH CLASS:
137, Fluid Handling, 489 for line condition responsive
valves having servo-motors of the choked pressure type.
Subclass:
34
This subclass is indented under subclass 33. Subject matter
in which means are provided to prevent back flow of fluid
around the main valve through the constantly open choke or
restriction under transient conditions of pressure change in
the main flow line.
(1) Note. These disclosures usually are described as
"anti-siphoning" although there is never any siphonic flow
under intended conditions of use.
SEE OR SEARCH CLASS:
137, Fluid Handling, 215 for back flow prevention by vacuum
breaking in systems which are not designed to have siphon
action in ordinary use.
Subclass:
35
This subclass is indented under subclass 33. Subject matter
in which the choke or restricted communication between the
servo-motor chamber and the region of either high or low
pressure varies in accordance with the degree of opening or
closing of the main valve.
(1) Note. The variation may be either abrupt or progressive
with the travel of the valve.
(2) Note. The variation may result from changing the size
of the pilot communication lines or from providing an
additional or alternative path for fluid shunting the choke
which is open at the proper time to accelerate or delay valve
operation.
Subclass:
36
This subclass is indented under subclass 33. Subject matter
in which an expansible chamber, other than or in addition to
the servo-motor chamber, is provided with a restricted
passage to retard the rate of travel of the main valve.
(1) Note. The expansible chamber may receive fluid from the
line or from a separate source, as in the closed fluid
circuit dashpot.
SEE OR SEARCH THIS CLASS, SUBCLASS:
47 for servo operated valves having separate dashpot
chambers, in which the servo mechanism is other than of the
choked pressure type.
48 for nonfluid actuated valves having similar retarding
means, especially subclasses 50+ for expansible chambers
receiving fluid from the line and subclass 54 for closed
circuit dashpots.
Subclass:
37
This subclass is indented under subclass 33. Subject matter
in which a flow resistance or choke device is serially
connected with and separate from the valve in the main flow
line.
(1) Note. This choke serves to regulate further the rate of
flow in the main flow line over and above the regulation
provided by the choked pressure type of servo-motor.
(2) Note. Where the restrictor is attached to and moves
with the movable element of the main valve, classification is
in the appropriate one for either the valve or the valve
actuator.
SEE OR SEARCH THIS CLASS, SUBCLASS:
24 for fluid actuated valves which are Venturi or line flow
effect assisted.
118 for valves having restrictors in series therewith.
SEE OR SEARCH CLASS:
137, Fluid Handling, 219 for Larner-Johnson valves, which
are associated with and have a seat formed at a restriction
in the line, subclasses 436+ for float operated valves having
a restrictor and subclasses 500+ for line condition change
responsive valves having expansible chamber reactor surface
subject to the differential effects resulting from an
obstruction in the line.
Subclass:
38
This subclass is indented under subclass 33. Subject matter
in which the pilot valve co-acts with a seating surface
therefor mounted on either the servo-motor element or the
main valve so as to partake of the motion thereof.
(1) Note. Some disclosures identify the pilot valve as a
mere relief valve and disclose that the main valve is
mechanically opened by the overtravel of the pilot valve
actuator, but these are here classified so long as their
structure provides for alternating of the high and low
pressure conditions in the expansible chamber.
SEE OR SEARCH CLASS:
137, Fluid Handling, 221 for Larner-Johnson type valves
having an internal pilot valve for an internal servo-motor,
subclass 490 for line condition change responsive pilot or
servo controlled valves in which the pilot valve is within
the main valve head and subclasses 630+ for a main valve and
concentric type balancing valve successively operated to open
or closed position.
Subclass:
39
This subclass is indented under subclass 38. Subject matter
in which the pilot valve admits the higher pressure to the
motor chamber and the choke establishes a restricted
communication between the motor chamber and the lower
pressure.
SEE OR SEARCH CLASS:
137, Fluid Handling, subclass 490 for fluid pressure servo
type condition responsive valve in which the pilot valve is
within the main valve head.
Subclass:
40
This subclass is indented under subclass 38. Subject matter
in which the pilot valve is opened or closed by a lateral
canting of the pilot valve causing the same to rock about a
point of contact between the valve and its seat to one side
of their center.
Subclass:
41
This subclass is indented under subclass 33. Subject matter
in which the pilot valve or an actuator therefor is located
elsewhere than on or immediately adjacent the main valve
unit, thus allowing operation of the main valve from a
station more accessible than is available at the location of
the main valve.
SEE OR SEARCH THIS CLASS, SUBCLASS:
57 for fluid link or column actuators for valves.
131 for remote control of electrically actuated valves.
293 for valves having an extension for the actuator.
294 for valves having a flexible actuator.
295 for pedal actuated valves.
Subclass:
42
This subclass is indented under subclass 33. Subject matter
in which means are provided for selectively setting the
maximum opening of the main valve.
(1) Note. The opening limit may be imposed by the
mechanical blocking of the opening movement of the main valve
or by some control exercised on the pilot valve.
SEE OR SEARCH THIS CLASS, SUBCLASS:
60 for adjustable limit stops for fluid pressure operated
valves not of the servo type.
284 for limit stops for valves of general types, and see the
search notes thereto.
Subclass:
43
This subclass is indented under subclass 33. Subject matter
in which the main valve is subjected to a constantly acting
force derived from the pressure of the flow line and tending
to open the main valve.
(1) Note. The line pressure tending to open the main valve
may act directly on the seat closing element of the valve or
may act on a separate pressure surface connected therewith,
such as a piston or diaphragm.
(2) Note. The line pressure opening force may be assisted
or opposed by other mechanical loading, such as a spring.
SEE OR SEARCH CLASS:
137, Fluid Handling, subclass 464 for safety cut-off valves
line pressure biased to open position and subclass 467 for
fluid opened valves which require resetting.
Subclass:
44
This subclass is indented under subclass 43. Subject matter
in which the constantly applied line pressure tending to open
the main valve is applied to the inner side of a separate
connected fluid reaction surface, such as a piston or
diaphragm, of larger diameter than the valve and located
adjacent thereto on the inlet side of the valve, this being
the side to which it moves in opening, whereby the resultant
opening force due to line pressure is determined by the
differential area between the diameter of the reaction
surface and the diameter of the valve seat.
(1) Note. The separate reaction surface may be the inner
face of the upper end of a spool type element, the inner end
surface of an inverted cup shaped valve element, an annular
extension of the valve in the plane of its closing area, etc.
In any case, the motion of the part of the valve which is in
contact with the seat is against the flow.
(2) Note. This type of valve is sometimes called "inlet
peripheral type", as distinguished from the "inlet central"
type of subclasses 43 and 46.
SEE OR SEARCH CLASS:
137, Fluid Handling, 494 for line condition change
responsive valves having separate connected fluid reactor
surfaces, especially subclass 509 for such valves seating in
the direction of flow.
Subclass:
45
This subclass is indented under subclass 44. Subject matter
in which the differential line pressure reacting surface is a
flexible wall or membrane which is deflected by the applied
fluid pressure.
SEE OR SEARCH CLASS:
92, Expansible Chamber Devices, 34 for a bellows type
expansible chamber device, and subclasses 90+, for a flexible
wall type expansible chamber device.
137, Fluid Handling, subclass 510 for line condition change
responsive valves which have a diaphragm or bellows type
separate connected reactor and seat in the direction of
flow.
Subclass:
46
This subclass is indented under subclass 43. Subject matter
in which the servo-motor is of the type using a flexible wall
or membrane that is deflected by the applied servo pressure.
SEE OR SEARCH THIS CLASS, SUBCLASS:
61 for diaphragm or bellows type fluid pressure valve
actuators not of the servo type.
SEE OR SEARCH CLASS:
92, Expansible Chamber Devices, 34 for a bellows type
expansible chamber device, and subclasses 90+ for a flexible
wall type expansible chamber device.
Subclass:
47
This subclass is indented under subclass 25. Subject matter
in which an expansible fluid chamber other than the servo
motor has a fluid restricting flow passage in communication
therewith and is associated with either the main or pilot
valves to resist or retard their motions.
SEE OR SEARCH THIS CLASS, SUBCLASS:
36 for servo operated valves having separable dashpot
chambers, in which the servo mechanism is of the choked
pressure type.
48 for dashpot or fluid controlled retarders or timers for
valves which do not have pilot or servo mechanisms.
Subclass:
48
This subclass is indented under subclass 12. Subject matter
in which the valve is provided with a fluid reaction means
that prescribes a rate of motion for, or an interval in, the
operation of the valve.
SEE OR SEARCH THIS CLASS, SUBCLASS:
15 for such devices in which the valve operating means is
disconnected immediately after the operating force is applied
or is overridden by the fluid reaction means, so that a
predetermined flow is obtained before a compulsory cut-off.
36 and 47, for pilot or servo operated valves which have
separate dashpots or choked fluid retarders.
64 for nonfluid timing or retarding means for valve
actuators.
SEE OR SEARCH CLASS:
16, Miscellaneous Hardware, 49 for liquid checks and
closers, subclasses 66+ for pneumatic checks and closers, and
subclass 84 for pneumatic closure checks.
137, Fluid Handling, 469 for pop type safety valves, i.e.,
those in which a separate reactor surface affected by the
relieved fluid modifies the response of the valve to the line
condition change after the valve opens and subclasses 514+
for dashpot controlled direct response valves.
188, Brakes, 297, for a dashpot or shock absorber of general
utility.
267, Spring Devices, 64.11, for fluid pressure springs.
Subclass:
49
This subclass is indented under subclass 48. Subject matter
in which the fluid reaction means frees the valve from the
restraining action of a catch or detent.
(1) Note. The fluid reaction means may comprise an
expansible chamber, a float chamber or a gravity tank which
receives a diverted portion of the flow and actuates the
latch or detent, thus relating the delay or control to the
duration or quantity of the flow after release of the
originating force.
SEE OR SEARCH THIS CLASS, SUBCLASS:
32 for latched pilot valves.
73 for fluid pressure released trips for valves in which the
fluid pressure has no relation to the duration of flow in the
line. See (1) Note.
SEE OR SEARCH CLASS:
137, Fluid Handling, 386 for controls which are responsive
to the level of accumulated liquid which comprises the total
flow or which act to maintain the level of an accumulation of
liquid. See (1) Note.
Subclass:
50
This subclass is indented under subclass 48. Subject matter
in which an expansible chamber device is in constantly open
but restricted communication with the main flow line.
SEE OR SEARCH THIS CLASS, SUBCLASS:
33 for choked pressure type servo-motor actuators for
valves.
Subclass:
51
This subclass is indented under subclass 50. Subject matter
in which means are provided to shunt fluid around or enlarge
the restricted communication.
(1) Note. Usually the shunt path is provided to permit
unretarded motion of the valve in either its opening or
closing movement while retarding the other movement.
(2) Note. Frequently the shunt path is controlled by either
a check valve or a cup type of packing on the piston of the
expansible chamber to produce a one-way retarding action on
the valve.
SEE OR SEARCH THIS CLASS, SUBCLASS:
35 for choked pressure type servo-motor actuators for valves
in which the choke passage varies according to the valve
position.
55 for dashpots which are not line pressure connected, but
which have choke by-pass or relief means.
Subclass:
52
This subclass is indented under subclass 50. Subject matter
in which fluid flows into the expansible chamber or dashpot
during the closing movement of the valve.
Subclass:
53
This subclass is indented under subclass 48. Subject matter
in which fluid is diverted from the main flow line into a
tank or receiving chamber at atmospheric pressure, which is
so related to the valve in the main flow line that the
collection of a sufficient quantity of fluid in the tank or
receiver actuates or causes the actuation of the valve.
SEE OR SEARCH THIS CLASS, SUBCLASS:
49 for similar devices responsive to the accumulation of
diverted fluid to release a latch or trip, and see the note
and search notes to that subclass.
SEE OR SEARCH CLASS:
137, Fluid Handling, 396 for self emptying tanks in which
the main flow is controlled through the accumulation of fluid
in the tank rather than the use of fluid diverted from the
main flow line and subclasses 403+ for liquid level
responsive or maintaining systems in which the weight of the
accumulated fluid controls the accumulation thereof.
Subclass:
54
This subclass is indented under subclass 48. Subject matter
in which valve operation is affected by an isolated fluid
flowing from an expansible chamber into a storage space from
which it returns to fill the expansible chamber without
co-mingling with other fluids.
(1) Note. Frequently the isolated fluid is caused to flow
from one side of a piston to the other.
(2) Note. See the search notes to subclass 48 for related
fields of search.
SEE OR SEARCH THIS CLASS, SUBCLASS:
48 and 55, for dashpot utilizing unconfined atmospheric air
as the fluid drawn into the expansible chamber.
Subclass:
55
This subclass is indented under subclass 48. Subject matter
in which a dashpot is filled with air drawn in from the
surrounding air and either the inflow or outflow is
restricted, means being provided to shunt fluid around the
restricted communication on reverse flow.
SEE OR SEARCH THIS CLASS, SUBCLASS:
35 for choked pressure type servo-motor actuators for valves
in which the choke passage varies according to the valve
position.
51 for similar chambers which are line pressure connected.
54 for similar restricted and unrestricted flow paths for
dashpots or choke chambers having a closed fluid circuit.
Subclass:
56
This subclass is indented under subclass 12. Subject matter
wherein the fluid pressure actuator gives more than one
character of motion or operation to the valve.
(1) Note. An example of plural operations would be rotating
and raising a rotary valve, the raising being for the purpose
of reducing friction while the valve is rotated.
SEE OR SEARCH THIS CLASS, SUBCLASS:
157 for plural mechanical operations including means to
increase the head and seat contact pressure.
215 for mechanical valve actuators giving more than one
character of motion to the valve, and see the search notes
thereto.
SEE OR SEARCH CLASS:
137, Fluid Handling, subclass 315.36 for a particular
mechanical actuator providing plural motions of a valve flow
control member with repair, tapping, assembly, or disassembly
means, or subclasses 330-333 for a nonvalving motion of a
valve or valve seat.
Subclass:
57
This subclass is indented under subclass 12. Subject matter
wherein the fluid pressure actuator for the valve is
connected by a closed fluid line to a control station at
which is located a means for varying the pressure in the
fluid line, which means takes the form of an expansible
chamber device such as a pump, pulsator, piston and chamber
or diaphragm and chamber.
SEE OR SEARCH THIS CLASS, SUBCLASS:
29 for fluid pressure actuated valves of the servo-motor
type, the operation of which is controlled from a distant
point by means of a valve for the power fluid, and subclass
41 for other types of remote pilot valve actuation.
131 for remote control of electrical valve actuators.
SEE OR SEARCH CLASS:
60, Power Plants, 533 for a fluid link or column, per se, or
actuating a nominal load other than a valve.
137, Fluid Handling, 82 for pressure modulating relays or
followers including fluid links, but not including valve or
the motor means which is actuated by it.
Subclass:
58
This subclass is indented under subclass 12. Subject matter
wherein a mechanical movement is interposed between the fluid
pressure actuator and the valve.
(1) Note. For the definition of a mechanical movement as
used in connection with valve actuation, see subclass 213.
SEE OR SEARCH THIS CLASS, SUBCLASS:
138 for electrical valve actuators with interposed
mechanical movements.
213 for valve actuators comprising mechanical movements and
see the search notes for other mechanical movement devices in
connection with other types of valve actuation or fluid
handling. See (1) Note. Search Class 137, Subclass.
505.46 and 505.47, for reactor surfaces operatedly connected
to valves by mechanical movement.
SEE OR SEARCH CLASS:
137, Fluid Handling, subclass 104 for pulsator valves
operated by suction, as in milker pulsators, with trip
linkage.
Subclass:
59
This subclass is indented under subclass 12. Subject matter
wherein the fluid pressure actuator comprises an impeller or
vane mounted to turn or swing about a pivot in response to
fluid flow or pressure and connected to actuate the valve.
SEE OR SEARCH CLASS:
137, Fluid Handling, subclass 332, for turbines connected to
valves to give a non-valving motion and subclass 499 for
turbine or swinging blade reactor surface connected to
operate a line condition change responsive valve.
Subclass:
60
This subclass is indented under subclass 12. Subject matter
wherein the actuator is provided with an adjustable stop to
limit the actuator travel.
SEE OR SEARCH THIS CLASS, SUBCLASS:
42 for adjustable limit stops for valves having choked
pressure type servo-motor actuators.
89 for valve actuators having means to hold the actuator in
a desired position or prevent its use.
284 for valves with nonfluid actuators provided with limit
stops, and see the search notes thereto.
Subclass:
61
This subclass is indented under subclass 12. Subject matter
in which the valve includes a reciprocating fluid control
member and the actuator for such member comprises an
expansible chamber device in which a portion of the
expansible chamber of such device includes a working member
comprising a wall made of flexible material and the flexing
of such wall in response to the application of fluid pressure
to the chamber constitutes the movement which effects
actuation of the control member.
(1) Note. An "expansible chamber device" under this
definition is a device in which the fluid actuating the
expansible chamber device is disclosed as distinct from the
fluid controlled by the control member of the valve; that is,
a separate fluid or fluid valved from the controlled fluid is
admitted to the expansible chamber to effect movement of the
flexible wall structure. See the Search Class note below to
Class 137, for devices excluded under this definition
(2) Note. The patents in this and the indented subclasses
are necessarily directed to a combination - the combination
of a reciprocating valve and a flexible wall expansible
chamber device. Because an expansible chamber device, per
se, is classified in Class 92 where a comprehensive breakdown
is provided, patents which disclose a specific Class 92
device in combination with a valve but do not claim such
combination, and where the improvement is directed to the
Class 92 device only, should not be cross-referenced into
this and the indented subclasses. Rather, a cross-reference
should be made to the appropriate subclass in Class 92.
SEE OR SEARCH THIS CLASS, SUBCLASS:
45 and 46, for choked fluid pressure type servo-motor
actuators for valves in which there is a diaphragm or bellows
in the operating mechanism.
SEE OR SEARCH CLASS:
92, Expansible Chamber Devices, 34 for a bellows type
expansible chamber device and subclasses 90+ for a flexible
wall type expansible chamber device.
137, Fluid Handling, 494, particularly subclass 505.36+ for a
valve having a diaphragm as a reactor surface, subclass 510
for a valve wherein a diaphragm or bellows actuator for the
valve is at least partially deflected by fluid in response to
a change in line condition of such fluid, and subclass 525
for valves of deformable material in which the restoring
force of such material constitutes the biasing means for the
valve.
Subclass:
61.1
This subclass is indented under subclass 61. Subject matter
in which the surface of the flexible wall working member
outside the expansible chamber constitutes the movable
control member which member is adapted to be moved to engage
a valve seat.
Subclass:
61.2
This subclass is indented under subclass 61. Subject matter
in which the movable control member, the seat or port for
such member and the flexible wall working member are
positioned and aligned along the same axis.
SEE OR SEARCH THIS CLASS, SUBCLASS:
63.5 for a valve having a coaxial valve actuator comprising
an expansible chamber device having a cylinder with a
relatively movable piston therein.
Subclass:
61.3
This subclass is indented under subclass 61.2. Subject
matter in which the control member is biased by spring means
concentric with the axis of such member and positioned on the
side of the control member opposite that of the flexible
wall, the spring means acting between a fixed member and the
control member.
Subclass:
61.4
This subclass is indented under subclass 61.2. Subject
matter in which the flexible wall or control member is biased
by spring means concentric with the axis of the control
member and positioned between the flexible wall and the
control member, the spring means acting between a fixed
member and the flexible wall or control member.
SEE OR SEARCH THIS CLASS, SUBCLASS:
63.6 for a valve and coaxial piston and cylinder expansible
chamber valve actuator with a coaxial spring biasing means
positioned between the valve and actuator.
Subclass:
61.5
This subclass is indented under subclass 61.2. Subject
matter in which the flexible wall member is biased by spring
means concentric with the axis of the control member and in
which the flexible wall member is positioned between such
spring means and control member the spring means acting
between a fixed member and the flexible wall.
Subclass:
62
This subclass is indented under subclass 12. Subject matter
in which the valve includes a reciprocating fluid control
member and the actuator comprises an expansible chamber
device having as a working member either a cylinder or a
piston, relatively movable therein, the cylinder and piston
forming an expansible chamber, the volume of the expansible
chamber changing with a corresponding relative movement of
the piston and cylinder in response to the supply of control
fluid to the chamber, such relative movement effecting
actuation of the control member.
(1) Note. The fluid actuating the expansible chamber device
is distinct from the fluid controlled by the control member
of the valve; that is a separate fluid or fluid valved from
the controlled fluid is admitted to the expansible chamber to
effect relative movement of the cylinder and piston. See the
Search Class note below to Class 137 for devices excluded
under this definition.
(2) Note. The patents in this and the indented subclasses
are necessarily directed to a combination the combination of
a reciprocating valve and an expansible chamber device, per
se, is classified in Class 92 where a comprehensive breakdown
is provided, patents which disclose a specific Class 92
device in combination with a valve, but do not claim such
combination and where the improvement is directed to the
Class 92 device only, should not be cross-referenced into
this and the indented subclasses. Rather, a cross-reference
should be made to the appropriate subclass in Class 92.
SEE OR SEARCH CLASS:
92, Expansible Chamber Devices, appropriate subclass for
piston and cylinder structure.
137, Fluid Handling, 494 for a valve having a separate
connected fluid reactor surface.
Subclass:
63
This subclass is indented under subclass 62. Subject matter
wherein the piston and the valve forms a unitary structure.
Subclass:
63.4
This subclass is indented under subclass 62. Subject matter
in which working or movable member of the expansible chamber
device is not rigidly secured to the movable control member
but is capable of transmitting movement to such member
through (1) direct engagement of separable engaging surfaces
or (2) through a spring or other resilient means.
(1) Note. One of the separable engaging surfaces is carried
on the cylinder, piston or piston rod of the expansible
chamber device and the other is on the movable control member
of the valve or actuating rod of the valve.
(2) Note. The spring or resilient means through which
motion is transmitted is positioned between an element rigid
with the movable working member of the expansible chamber
device and an element rigid with the control member and is
adapted to engage both.
SEE OR SEARCH CLASS:
92, Expansible Chamber Devices, subclass 84 for apparatus
comprising a resilient means interposed between the working
member of an expansible chamber device and a relatively
movable power transmission element and subclass 129 for
apparatus comprising an abutment connection between a working
member and a power transmitting element.
Subclass:
63.5
This subclass is indented under subclass 62. Subject matter
in which the movable control member, the seat or port for
such member, the cylinder of the expansible chamber device
and the piston relatively movable therein are positioned and
aligned along the same axis.
SEE OR SEARCH THIS CLASS, SUBCLASS:
61.2 for a valve having a coaxial valve actuator comprising
a flexible wall expansible chamber device.
Subclass:
63.6
This subclass is indented under subclass 63.5. Subject
matter in which the movable working member of the expansible
chamber device or the control member is biased by spring
means concentric with the axis of the control member and
positioned between the movable working member and control
member, the spring means acting between a fixed member and
the working member or control member.
SEE OR SEARCH THIS CLASS, SUBCLASS:
61.4 for a valve and coaxial flexible wall expansible
chamber valve actuator with a coaxial spring biasing means
positioned between the valve and actuator.
Subclass:
64
This subclass is indented under the class definition.
Subject matter in which the actuator includes means, other
than one utilizing a fluid, for retarding the motion of valve
actuation.
SEE OR SEARCH THIS CLASS, SUBCLASS:
48 for a valve having fluid retarder, and see the Search
Notes thereto.
SEE OR SEARCH CLASS:
137, Fluid Handling, 416 for a quick acting float controlled
valve, a period of delay usually preceding the quick action;
subclass 435 for float arm operated means with a valve
retarder; subclass 514 for a direct acting condition
responsive valve having a retarder; subclasses 624.11+ for a
programmer or nonfluid timer type actuator controlling a
valve.
222, Dispensing, subclass 477 for retarded or delayed action
discharge controller in a dispenser.
Subclass:
65
This subclass is indented under the class definition.
Subject matter wherein the actuator for the valve includes a
permanent magnet or a constantly energized electromagnet.
(1) Note. The magnets to be found in this class are such
that there is no means for varying their magnetic properties
and the control is usually either by the movement of the
magnet or by some control of the magnetic circuit outside of
the magnet.
Subclass:
66
This subclass is indented under the class definition.
Subject matter wherein the valve is provided with a biasing
means for urging it in one direction, a latch holds the valve
against the action of the biasing means and a trip is
provided for releasing the latch so that the biasing means
may move the valve.
(1) Note. The latch may take the form of a collapsible
toggle.
SEE OR SEARCH THIS CLASS, SUBCLASS:
89 for valves having means for blocking or disabling the
actuator.
SEE OR SEARCH CLASS:
137, Fluid Handling, subclass 50 and 57 for trip devices
which are actuated in response to excess speed of rotation of
a shaft to permit a valve to open or close, subclasses 65+
for combustion failure responsive fuel safety cut-offs for
burners, many of which involve trip type actuators,
subclasses 67+ for destructible or deformable element
control, many being biased trip devices subclass 104 for
suction pulsator devices with trip linkage, subclass 417 for
float controlled valves released by pilot floats, subclasses
420+ for trip mechanism in float controlled valves and
subclass 456 for safety cut-offs requiring resetting, many
being a trip type, especially subclass 463 for fluid released
trip type safety cut-off valves requiring resetting.
Subclass:
67
This subclass is indented under subclass 66. Subject matter
associated with means for normally actuating the port
controller with trip device latched in its bias restraining
position.
Subclass:
68
This subclass is indented under subclass 66. Subject matter
wherein the means for actuating the trip is an electrical
means.
(1) Note. This subclass provides for explosive actuated
trip devices which employ an electrically actuated igniter.
SEE OR SEARCH THIS CLASS, SUBCLASS:
129 for electrically actuated valves and see the search
notes thereto.
Subclass:
69
This subclass is indented under subclass 68. Subject matter
wherein the trip is operated to actuate the valve when the
electric power supply to the electrical means fails.
SEE OR SEARCH THIS CLASS, SUBCLASS:
27 for servo failure responsive control of a valve operated
by a servo-motor.
SEE OR SEARCH CLASS:
137, Fluid Handling, subclass 66 for thermoelectric type
combustion failure responsive fuel safety cut-offs for
burners.
Subclass:
70
This subclass is indented under subclass 68. Subject matter
wherein an additional electrical means is provided for
resetting the valve and/or trip.
(1) Note. A usual arrangement is one wherein the additional
electrical means draws the valve head back against the
biasing means and wherein the latch then engages to hold the
valve in the biased position until the trip is actuated.
SEE OR SEARCH CLASS:
137, Fluid Handling, subclass 66 for thermoelectric control
of resetting for combustion failure responsive fuel safety
cut-offs for burners and subclasses 456+ for safety cut-offs
which must be reset by external means, many of these devices
being of the trip type.
Subclass:
71
This subclass is indented under subclass 70. Subject matter
wherein the electrical valve actuating means includes a
rotary electric motor.
SEE OR SEARCH THIS CLASS, SUBCLASS:
133 for rotary electric motor valve actuators not of the
trip type.
Subclass:
72
This subclass is indented under subclass 66. Subject matter
wherein the biasing means for the trip or valve includes a
gravity urged weight, which, when the latch is tripped,
effects or assists the opening or closing of the valve.
SEE OR SEARCH THIS CLASS, SUBCLASS:
338 for weight biased valves, and see the search notes
thereto.
Subclass:
73
This subclass is indented under subclass 66. Subject matter
wherein the means for actuating the trip includes fluid
pressure motive means.
(1) Note. The trip may be actuated either by the
application of a predetermined fluid pressure or by the
decrease or failure of a fluid pressure.
(2) Note. The pressure fluid may be obtained from fuel
oxidized in a chamber.
SEE OR SEARCH THIS CLASS, SUBCLASS:
12 for fluid pressure actuated valves.
49 for dashpot type trip release in fluid actuated or
retarded valves.
SEE OR SEARCH CLASS:
137, Fluid Handling, 386 and 393 for liquid level responsive
devices in which a fluid pressure differential results from a
vent closed by accumulated material and subclass 463 for
fluid released trip type safety cut-off valves requiring
resetting.
141, Fluent Material Handling, With Receiver or Receiver
Coacting Means, 198 for feed cut-off by rising liquid level
in a filled receiver.
Subclass:
74
This subclass is indented under subclass 66. Subject matter
wherein the trip actuator includes a mechanical movement.
(1) Note. For a definition of a mechanical movement
actuator, see subclass 213.
SEE OR SEARCH THIS CLASS, SUBCLASS:
213 for mechanical movement actuated valves, and see the
search notes thereto.
SEE OR SEARCH CLASS:
137, Fluid Handling, 420 for trip-mechanism for quick acting
float controlled valves.
Subclass:
75
This subclass is indented under the class definition.
Subject matter wherein the valve actuator is provided with
means which will give the valve an accelerated or snap action
during a part of its motion as compared to a relatively slow
motion during another part of its motion.
(1) Note. By snap action is usually meant an arrangement
wherein the actuation of the valve is first delayed while
energy is stored in a spring or equivalent device and then
the stored energy is released, such release taking place in a
short time to provide a quick response of the actuated
element.
SEE OR SEARCH THIS CLASS, SUBCLASS:
64 for valves with nonfluid timer or retarder, and see the
search notes thereto for a general list of retarded valves.
66 for biased trip type valves, including toggle type latch
devices.
77 for lost motion devices involving mere delay without a
subsequent acceleration.
SEE OR SEARCH CLASS:
91, Motors: Expansible Chamber Type, 344 for cyclically
operable expansible chamber motors having snap action
distributing valves.
137, Fluid Handling, 469 for pop type safety valves.
222, Dispensing, 498 for snap acting outlet elements for
dispensers.
Subclass:
76
This subclass is indented under the class definition.
Subject matter wherein the valve actuator is of the type
where a first element after a free movement strikes a second
element and the impact thereof is the force which actuates
the valve.
SEE OR SEARCH THIS CLASS, SUBCLASS:
77 for apparatus wherein the lost motion actuation of the
valve may result in an impact effect under some
circumstances.
129 for solenoid valve actuators where a gap normally occurs
between the valve and armature in one position of the valve.
SEE OR SEARCH CLASS:
166, Wells, subclass 194 and the subclass there noted for a
well apparatus comprising a valve actuated by a dropped ball
or fluid driven piston.
Subclass:
77
This subclass is indented under the class definition.
Subject matter wherein the connection between the actuator
and valve is such that during part of its valve- actuating
travel the actuator or a part thereof may move without
producing any movement of the valve.
(1) Note. Certain actuators wherein interruptions in the
continuity of transmission of movement or energy to the valve
are inherent in the law of operation of the mechanism, as in
solenoids, ratchets, etc., are classified in succeeding
subclasses on the basis of the particular actuator involved.
SEE OR SEARCH THIS CLASS, SUBCLASS:
75 for snap actuation mechanisms.
76 for impact actuation mechanisms.
129 for solenoid valve actuators. See (1) Note.
157 for lost motion connections between the actuator and the
valve but also including means to increase the head and seat
contact pressure operable during the period of lost motion.
230 for ratchet type mechanical movement actuators. See (1)
Note.
249 for interrupted gearing mechanical movement actuators.
See (1) Note.
SEE OR SEARCH CLASS:
137, Fluid Handling, subclass 243.3 for lost motion
connections which permit the valve to be found on its seat,
subclass 422 for lost motion in quick acting float controlled
valves, subclass 474 for lost motion between a pop pressure
reactor and a condition responsive valve, subclass 630.19+
for lost motion between a single actuator and a plurality of
sequentially progressively operating valves.
Subclass:
78
This subclass is indented under subclass 77. Apparatus
including a lost motion connection in the lever system.
Subclass:
79
This subclass is indented under subclass 77. Subject matter
wherein the lost motion between the actuator and the valve is
such that when the force transmitted between the actuator and
the valve rises above a predetermined valve (1) the
connection between the actuator and valve is broken and no
further force is transmitted therebetween, or (2) the force
transmitted therebetween is greatly reduced.
SEE OR SEARCH CLASS:
192, Clutches and Power-Stop Control, appropriate subclasses,
especially 12 for clutch and brake combinations and subclass
30+ for clutches, per se.
Subclass:
80
This subclass is indented under subclass 79. Subject matter
wherein the lost motion connection between the actuator and
the valve includes an elastic element.
(1) Note. In order that the elastic element be so
considered, its elastic properties must be used in producing
the lost motion between actuator and valve.
Subclass:
81
This subclass is indented under subclass 79. Subject matter
wherein the lost motion connection between the actuator and
the valve includes a friction coupling or clutch.
SEE OR SEARCH CLASS:
192, Clutches and Power-Stop Control, appropriate subclasses,
especially 12 and 30+ for clutches combined with fluid
couplings or brakes and clutches, per se.
Subclass:
82
This subclass is indented under subclass 77. Devices wherein
the actuator is so connected to the valve that in its
intermediate position it permits the valve to operate as a
check valve and in its extreme positions it holds the valve
open or closed.
SEE OR SEARCH THIS CLASS, SUBCLASS:
213 318+ and 336, for actuators which may contact a valve or
part thereof to open or close it in opposition to its bias.
Subclass:
83
This subclass is indented under subclass 82. Devices wherein
the movement of the valve is modified by a spring.
Subclass:
84
This subclass is indented under the class definition.
Subject matter wherein the valve head is movably related to
its stem or other immediately supporting element, there being
no guide or link or other actuator in engagement with said
stem or supporting element between the head and the movable
connection, or with the head in such a way as to hold it in
alignment with the seat.
(1) Note. The movable connection may be of the universal,
swivel or pivot type, the purpose being to let the valve head
seat squarely even if the stem or other supporting element is
not accurately aligned, or to allow the valve head to slip
past projection in seating.
SEE OR SEARCH THIS CLASS, SUBCLASS:
40 for tilting concentric pilot valve in fluid servo-motor
valve actuators.
157 for relatively movable head and stem constructions for
pressing heads to seats which permit alignment.
SEE OR SEARCH CLASS:
137, Fluid Handling, subclass 527.4 for direct-response,
pivoted valves constructed to permit self adjustment.
Subclass:
85
This subclass is indented under subclass 84. Devices in
which the connection is resiliently yieldable.
Subclass:
86
This subclass is indented under subclass 84. Devices in
which the connection permits movement of the head in more
than one direction.
Subclass:
87
This subclass is indented under subclass 84. Devices in
which a pivotal connection permits the head to swing in one
plane only.
(1) Note. The axis of the pivot is usually perpendicular to
the axis of the valve stem.
Subclass:
88
This subclass is indented under subclass 84. Devices in
which the valve head rotates only, usually with the axis of
the valve stem as the center of rotation.
Subclass:
89
This subclass is indented under the class definition.
Subject matter wherein means are provided for detaining,
blocking or disabling a valve actuator, the actuator being
restrained against motion away from the point at which the
detent or holding means engages it.
(1) Note. The blocking or disabling means of this subclass
is not a part of the valve actuator and the unblocking or
disabling does not actuate the valve.
(2) Note. Valve actuating mechanisms having a separately
actuated clutch which disables the mechanism are included.
SEE OR SEARCH THIS CLASS, SUBCLASS:
66 for valves provided with biased trips whose latches or
detents are analogous to the blocking or disabling means
above, and see the search notes to subclass 66.
79 for yielding connectors, e.g., slip clutch, in a valve
actuating mechanism. See (2) Note.
230 for ratchet operating mechanisms in which detents are
used in holding valves between ratcheting.
284 for limit stops for valve actuators, these preventing
further motion in one direction but allowing retrograde
movement, and see the search notes thereto.
297 for frictional detents.
SEE OR SEARCH CLASS:
74, Machine Element or Mechanism, 527, and all other
appropriate subclasses for detents for control lever and
linkage systems.
137, Fluid Handling, subclass 303 for means for disabling
stop and waste valves in hydrants, as for summer conditions,
subclasses 382+ for valve guards which prevent access to a
valve or its actuator, subclasses 383+ for arrangements
wherein the valve is locked or sealed against unauthorized
use and subclasses 523+ for valves directly responsive to
line condition change which are provided with means for
latching them open.
222, Dispensing, subclass 43 and 44 for dispensers having
discharge controlling stops and/or detents combined with
indicating means.
Subclass:
89.5
This subclass is indented under subclass 89. Subject matter
wherein (1) the actuator which is detained, blocked or
disabled includes a flow path section which is separable from
the valved section or (2) the means which detains, blocks or
disables the actuator includes a flow path section which is
separable from the valved section or that structure which
joins the separate sections.
SEE OR SEARCH THIS CLASS, SUBCLASS:
149.9 for separable flow path sections, the joining or
disconnection thereof being blocked or disabled by a valve,
or its actuator, in one section.
SEE OR SEARCH CLASS:
137, Fluid Handling, subclass 614.06 for separable, valved,
flow path sections with the means for coupling the sections
interlocked with a valve or its actuator, and subclass 637.05
for separable, valved, flow path sections wherein the valve
actuators are correlated.
Subclass:
90
This subclass is indented under subclass 89. Devices
comprising a separate unit attached to a conventional valve
structure.
Subclass:
91
This subclass is indented under subclass 90. Attachments
wherein there is modification of the valve structure to
receive the disabling unit.
Subclass:
92
This subclass is indented under subclass 90. Attachments
wherein the valve has a limit stop which is retained in a
fixed position by the direct engagement of the disabling
means with some part of the stop.
Subclass:
93
This subclass is indented under subclass 92. Devices wherein
the disabling means is fixedly attached to the valve stem or
actuator.
Subclass:
94
This subclass is indented under subclass 89. Devices wherein
the latch means is fluid pressure biased.
Subclass:
95
This subclass is indented under subclass 89. Devices wherein
the means for blocking or disabling the handle is released by
non-valving motion of the actuator.
Subclass:
96
This subclass is indented under subclass 95. Devices wherein
the handle is linearly reciprocated to release the blocking
means.
Subclass:
97
This subclass is indented under subclass 96. Devices wherein
the latch connects the actuator to the body through the head.
The actuator may be an integral part of the head.
Subclass:
98
This subclass is indented under subclass 95. Devices wherein
an integral portion of a pivotally mounted handle serves as a
blocking or disabling means.
Subclass:
99
This subclass is indented under subclass 98. Devices wherein
the pivotally mounted handle is spring biased in the blocking
or disabling position.
Subclass:
100
This subclass is indented under subclass 95. Devices wherein
the handle is rotated about the axis of the valve stem to
actuate the blocking or disabling means.
Subclass:
101
This subclass is indented under subclass 89. Devices wherein
the manipulator for the disabling means is mounted on the
handle or stem for movement independent of the handle or
stem.
SEE OR SEARCH THIS CLASS, SUBCLASS:
93 for attachments mounted on the valve handle or stem.
Subclass:
102
This subclass is indented under subclass 101. Devices
wherein the manipulator has constrained linear motion.
Subclass:
103
This subclass is indented under subclass 102. Devices
wherein the linear movement of the manipulator operates a
pivoted latch.
Subclass:
104
This subclass is indented under subclass 102. Devices
wherein the latch is rigidly associated with the
manipulator.
Subclass:
105
This subclass is indented under subclass 104. Devices
wherein a distinct latch lug extends transverse to the line
of movement of the manipulator.
Subclass:
106
This subclass is indented under subclass 102. Devices
wherein the latch has movement transverse to the line of
movement of the manipulator.
Subclass:
107
This subclass is indented under subclass 101. Devices
wherein the latch is a pivoted member.
SEE OR SEARCH THIS CLASS, SUBCLASS:
93 for actuator latches that are mounted on the valve
actuator.
Subclass:
108
This subclass is indented under subclass 107. Devices
wherein the latch and manipulator are joined or made integral
to form a single continuous member having at least one
portion that is resilient and the pivot is a segment of the
spring secured to the handle or stem. The latch moves in an
arcuate path.
Subclass:
109
This subclass is indented under subclass 107. Devices
wherein the latch is spring biased.
Subclass:
110
This subclass is indented under subclass 101. Devices
wherein the latch has constrained linear motion.
Subclass:
111
This subclass is indented under subclass 89. Devices wherein
the manipulator for the disabling means is mounted on the
valve body.
Subclass:
112
This subclass is indented under subclass 111. Devices
wherein a set screw is both latch and manipulator.
Subclass:
113
This subclass is indented under subclass 111. Devices
wherein the manipulator has constrained linear motion and the
latch is rigidly associated with the manipulator.
Subclass:
114
This subclass is indented under subclass 111. Devices
wherein the latch is a pivoted member.
Subclass:
115
This subclass is indented under subclass 114. Devices
wherein the latch and manipulator are joined or made integral
to form a single continuous member having at least one
portion that is resilient and the pivot is a segment of the
spring secured to the body. The latch moves in an arcuate
path.
Subclass:
116
This subclass is indented under subclass 114. Devices
wherein the latch is spring biased.
Subclass:
117
This subclass is indented under the class definition.
Subject matter wherein a restricted passage is provided in
parallel to a main valve.
(1) Note. The usual purpose of such restricted passage is
either to provide a bleed across the valve to permit a
minimum flow of current when the valve is closed or to
equalize pressure across the valve.
SEE OR SEARCH THIS CLASS, SUBCLASS:
118 for valves having a material guide or restrictor in
series flow relation.
SEE OR SEARCH CLASS:
137, Fluid Handling, subclasses 513.3-513.7 for a line
condition direct response valve (i.e., check valve) having an
open bleed port, subclass 599.17 for systems dividing into
parallel flow lines then recombining having rotary plug flow
control member having a variable restrictor, subclasses
601.18-601.19 for systems dividing into parallel flow lines
then recombining having a material guide or restrictor,
subclasses 625.28-625.39 for systems having a multi way valve
unit with dividing into parallel flow lines with recombining,
or subclasses 629-630.15 for systems having sequentially
opening or closing of plural valves for pressure equalizing
or auxiliary shunt flow.
Subclass:
118
This subclass is indented under the class definition.
Subject matter wherein a restrictor or material flow guide
other than a nozzle or outlet shape is provided in series
with a valve.
(1) Note. Since some restrictors, especially movable or
adjustable types, differ from valves only in the intended
use, the search should be continued in various serial valve
categories. See especially the search notes in section 23 of
the class definitions of Class 222, Dispensing.
(2) Note. Many of these restrictors have silencing as their
chief purpose.
SEE OR SEARCH THIS CLASS, SUBCLASS:
33 for valves actuated by choked pressure type servo-motors,
especially subclass 37 for such valves having a choke or
restrictor in the main line.
216 for screw threads in a flow passage which will have
inherently restricted properties.
SEE OR SEARCH CLASS:
137, Fluid Handling, subclasses 118.01-119.1 for
self-controlled branched flow systems having plural outflows,
subclasses 171-204 for diverse fluid containing pressure
systems with fluid separating traps or vents, especially
subclasses 175-176 for a choke or restricted passage gas
bleed, subclasses 436-437 for a float arm operated valve for
a liquid level responsive or maintaining system with a flow
guide or restrictor, subclasses 544-550 for means for
separating solid material from the fluid filters, subclasses
590-592 for distribution systems comprising a tank with an
internally extending flow guide, subclass 599.17 for systems
dividing into parallel flow lines then recombining having
rotary plug flow control member having a variable restrictor,
subclasses 601.18-601.19 for systems dividing into parallel
flow lines then recombining having a material guide or
restrictor or subclass 802 miscellaneous (e.g., dummy valve,
outlet form, conduit form, material, valve body, etc.).
138, Pipes and Tubular Conduits, 40 for flow restrictors in
pipes and tubular conduits and subclass 46.5 for pipes with
discharge deflectors.
166, Wells, subclass 91.1 for well heads with chokes or
beans.
193, Conveyors, Chutes, Skids, Guides, and Ways, subclass 32
for conveyor chutes with retarders.
222, Dispensing, subclass 547 and 564 for dispensers having
internal flow restrictors.
239, Fluid Sprinkling, Spraying, and Diffusing, 380, 399+,
461+, 553+, 575, and 590+ for spray nozzles combined with
whirlers or other restrictors in the flow line or with
external deflectors.
Subclass:
119
This subclass is indented under subclass 118. Devices in
which the flow of fluid downstream of the valve is guided or
restricted to produce a zone of low pressure which acts
through a passage to return to the fluid material which has
found its way into the valve stem passage.
Subclass:
120
This subclass is indented under subclass 118. Subject matter
wherein the flow material guide or restrictor is movable with
respect to the walls of the flow passage.
(1) Note. For the purposes of this and indented subclasses
the distinction between a movable restrictor and the valve is
that in any of the normally occurring positions of a
restrictor fluid will still flow. If in any normally
occurring position the flow is completely arrested, the
device is not a restrictor but a valve. However, the
distinction cannot be made in many instances, and movable
flow restrictors are frequently considered valves in this
class. See the class definition.
(2) Note. The movable restrictors of this subclass are
either movably mounted or floating in the flow path or
connected to a movable part of the valve, or made of
resilient material.
(3) Note. Guides which extend along a flow path from a
valve head to keep the valve in alignment with its seat are
not considered restrictors unless modified to control flow or
turbulence, but are classified on the basis of the valve or
its actuator or other appropriate basis.
SEE OR SEARCH THIS CLASS, SUBCLASS:
215 and 264+, for screw actuators for valves.
SEE OR SEARCH CLASS:
137, Fluid Handling, 497 for reaction members operating line
condition responsive valves, the effect of such members being
generally flow restricting, per se, subclass 525 for
resilient material valves responding directly to line
pressure and subclasses 613+ for distribution systems
comprising a single flow path with plural serial valves
and/or closures.
138, Pipes and Tubular Conduits, subclass 43, 45 and 46 for
pipes with variable flow restrictors.
Subclass:
121
This subclass is indented under subclass 120. Subject matter
wherein the movable guide or restrictor is adjustable, i.e.,
may be put into a different position or relation with respect
to its mounting and/or actuator for the purpose of securing a
different character or rate of flow when flow subsequently
occurs.
(1) Note. See the class definition of Class 137, section 5,
for search notes on manual valve actuation and adjusting.
SEE OR SEARCH THIS CLASS, SUBCLASS:
215 and 264+, for screw actuators for valves, and see the
search notes to subclass 264.
SEE OR SEARCH CLASS:
138, Pipes and Tubular Conduits, subclass 43, 45 and 46 for
variable flow restrictors not combined with valves or
distribution systems.
Subclass:
122
This subclass is indented under subclass 121. Devices in
which the adjustable restrictor is a tapered plug which
extends into the flow passage.
SEE OR SEARCH CLASS:
137, Fluid Handling, subclass 625.3 for means to adjust flow
through parallel passages in a movable flow-controlling
element.
Subclass:
123
This subclass is indented under subclass 118. Subject matter
wherein the restrictor comprises a contracted portion of the
flow line and the valve is located at the point of greatest
constriction of the flow line.
SEE OR SEARCH THIS CLASS, SUBCLASS:
24 for fluid actuated or retarded valves which are Venturi
or flow line effect assisted.
37 for choked fluid pressure type servo-motor valve
actuators with a main line having a choke or restriction.
SEE OR SEARCH CLASS:
137, Fluid Handling, 219 for Larner-Johnson valves, i.e.,
expansible chamber or internal telescoping valves, which are
seated at a point of restriction in the line, subclasses 436+
for float operated valves having a restrictor, subclass 487
for pilot or servo control of a condition change responsive
valve controlled by pressure differentials across the flow
line valve, subclasses 500+ for condition responsive devices
having separate connected reactor surface means responsive to
rate of fluid flow, usually measured across a restriction and
subclass 515 for drill pipe check valves.
Subclass:
124
This subclass is indented under subclass 123. Subject matter
wherein the valve is placed in the throat of a Venturi tube
and the point of valve location coincides with the point of
greatest restriction of the Venturi.
Subclass:
125
This subclass is indented under subclass 118. Subject matter
wherein the restrictor is such that with a constant flow of
fluid thereto the stream flowing outwardly therefrom takes
the form of drops.
SEE OR SEARCH CLASS:
222, Dispensing, subclass 420 for drop forming dispensers,
and see the search notes thereto.
Subclass:
126
This subclass is indented under subclass 118. Subject matter
wherein the guide or restrictor comprises means forming a
passage which advances the material along the flow path while
also causing it to travel around the circumference of a
circular or conical core between guides applied to or formed
by said core.
SEE OR SEARCH CLASS:
138, Pipes and Tubular Conduits, 42 for pipes with
restrictors in the form of a tortuous path.
Subclass:
127
This subclass is indented under subclass 118. Subject matter
wherein the restricting means is of a form such that the
fluid flow direction is changed at least twice in a plurality
of stages.
(1) Note. Typical of the restrictors to be found in this
subclass are (1) restrictors comprising a plurality of baffle
plates so arranged that the fluid flowing past them eddies or
reverses its flow and (2) restrictors comprising a passage
which is reversed back on itself a plurality of times to
produce a number of reversals of flow greater than two.
SEE OR SEARCH CLASS:
137, Fluid Handling, subclass 573 and 574 for plural series
flow related tanks or compartments formed by baffles and/or
providing for zigzag flow.
138, Pipes and Tubular Conduits, 42 for pipes with flow
restrictors in the form of a tortuous path.
Subclass:
128
This subclass is indented under the class definition.
Subject matter wherein means are provided in connection with
a detachable valve actuator, whereby a sealing member is
brought into operable position to prevent leakage when the
actuator is detached.
(1) Note. The arrangement herein usually takes the form of
a valving means for the opening through which the actuator
passes which closes the opening when the actuator is detached
from the main valve.
SEE OR SEARCH THIS CLASS, SUBCLASS:
291 for valves having detachable actuators.
335.1 for valves having a hermetic flexible wall seal for
the actuator.
SEE OR SEARCH CLASS:
137, Fluid Handling, subclass 285 for hydrants having a
check valve to close the flow when the main valve is removed,
subclasses 312+ for leakage or drip collectors for fluid
handling devices and subclasses 613+ for serial valves in
distribution systems one of which may be a repair closure for
the other.
Subclass:
129.01
ELECTRICALLY ACTUATED VALVE:
This subclass is indented under the class definition.
Subject matter comprising means in the form of a valve
actuator which uses electrical energy to change the position
of a movable element, i.e., a valve, to regulate or control
the flow of a fluent material through a passage or opening.
SEE OR SEARCH THIS CLASS, SUBCLASS:
30.01 for electromagnetically operated pilot valves for
servo-motors for valve actuation.
68 for electric trip actuation, including resetting, of
biased trip type valves.
SEE OR SEARCH CLASS:
123, Internal-Combustion Engines, subclass 90.11 for poppet
valve operating mechanism which is electrically powered.
137, Fluid Handling, 65 for solenoids controlling safety
cut-off valves for oil burners, subclass 76 for heaters for
destructible or fusible control elements, subclass 341 for
fluid handling systems with electric heating elements,
subclass 392 for liquid level control by electrical
characteristic sensing, subclass 554 for electrical
indicators for position or extent of motion or system parts,
subclass 596.17 for electrically operated supply and exhaust
valves, and subclass 625.65 for electrically operated supply
and exhaust multiway valve units.
222, Dispensing, 333 and 504 for motor operated discharge
assistants and outlet elements.
Subclass:
129.02
With means to bias valve open:
This subclass is indented under subclass 129.01. Subject
matter wherein a spring, fluid pressure, or other agent is
used to maintain the valve in a position which allows the
fluent material to flow through the passage until the valve
actuator moves the valve to a position which closes the
passage.
Subclass:
129.03
With nonelectrical actuator:
This subclass is indented under subclass 129.01. Subject
matter also including an alternative actuator which does not
require electrical energy to move the valve.
(1) Note. Where both electrical and nonelectrical
mechanisms are present, but in which the mechanisms are not
of themselves each capable of fully controlling the valve,
the actuators are not considered to be alternative within the
scope of this subclass and are classified in the appropriate
subclass for the electrical actuation and cross referenced
for novel nonelectrical actuation mechanisms. An example of
such excluded device would be a trip released actuator with
an electrical reset in subclasses 70+.
(2) Note. See the class definition of Class 137 section 4
for search notes on multiple actuators.
SEE OR SEARCH THIS CLASS, SUBCLASS:
14 for fluid actuated valves having alternative nonfluid,
including electrical, actuating means.
68 for electrical trip actuation including electrical reset
for valves, and see (1) Note above.
Subclass:
129.04
Remote or follow-up control system for electrical actuator:
This subclass is indented under subclass 129.01. Subject
matter wherein an electrical control system is provided for
controlling the valve actuator, which control system is
either: (a) an electrical system including means interposed
between an operator control station which is far removed from
the valve actuator or (b) an arrangement such that movement
of a control member will result in an equal or proportional
movement of a controlled member.
SEE OR SEARCH THIS CLASS, SUBCLASS:
41 for remote control of choked pressure type servo-motor
valve actuators.
57 for fluid link type remote actuators for valves, and see
the search notes to these subclasses.
SEE OR SEARCH CLASS:
318, Electricity: Motive Power Systems, 560 for electric
motor position servomechanism; appropriate subclasses for
remotely controlled electric motors.
Subclass:
129.05
Having means to produce digital pulses:
This subclass is indented under subclass 129.01. Subject
matter wherein the valve actuator includes means for
providing discrete pulses of electrical energy, i.e., "off"
or "on", or "0" or "1" electrical signals.
Subclass:
129.06
Having element dimensionally responsive to field:
This subclass is indented under subclass 129.01. Subject
matter wherein a dimension of the valve or actuator changes
in size when subjected to a magnetic or an electrical field
to thereby control the flow of the fluent material.
Subclass:
129.07
Balanced valve:
This subclass is indented under subclass 129.01. Subject
matter which includes means for equalizing pressures acting
on the valve or valve actuator whereby minimal electrical
energy is required to move the valve to a desired position.
Subclass:
129.08
Having means to produce proportional flow:
This subclass is indented under subclass 129.01. Subject
matter which includes means for moving the valve a distance
which is in proportion to the magnitude of the electrical
energy supplied, or to regulate the flow in proportion to the
magnitude of the electrical energy supplied.
Subclass:
129.09
Solenoid having plural coils:
This subclass is indented under subclass 129.01. Subject
matter wherein the valve actuator includes a solenoid or
reciprocating type of electrical valve actuator which has at
least two spiral electrical windings, each winding being
wound about an imaginary center line.
Subclass:
129.10
Coils have common axis:
This subclass is indented under subclass 129.09. Subject
matter wherein at least two of the windings have the same
imaginary center line.
Subclass:
129.11
Rotary electric actuator:
This subclass is indented under subclass 129.01. Subject
matter wherein the valve actuator is of a type which rotates
to actuate the valve.
SEE OR SEARCH THIS CLASS, SUBCLASS:
71 for rotary electric motor means for resetting a bias trip
type valve.
Subclass:
129.12
With limit control:
This subclass is indented under subclass 129.11. Subject
matter wherein the rotary valve actuator is provided with
means for regulating the actuator at a predetermined point in
the operation of the actuator to disable or otherwise control
the actuator.
SEE OR SEARCH THIS CLASS, SUBCLASS:
284 for limit stops for valves, and see the search notes
thereto.
Subclass:
129.13
With speed or braking control:
This subclass is indented under subclass 129.11. Subject
matter wherein a control means is provided for either
regulating or slowing down the speed of the rotary valve
actuator.
SEE OR SEARCH CLASS:
137, Fluid Handling, 47 for speed responsive valve control.
Subclass:
129.14
Freely rotatable ball valve:
This subclass is indented under subclass 129.01. Subject
matter wherein the valve is a spherical member which is
mounted so that the member can turn in any direction during
actuation.
Subclass:
129.15
Including solenoid:
This subclass is indented under subclass 129.01. Subject
matter wherein the valve actuator comprises a winding or coil
and a metal core or armature, i.e., a solenoid, the coil and
armature mounted for relative movement when the coil is
energized.
Subclass:
129.16
Having plate-shape armature:
This subclass is indented under subclass 129.15. Subject
matter wherein the armature is circular metal disc or other
relatively thin metal body mounted for reciprocation in the
direction of its thinnest dimension.
Subclass:
129.17
Having diaphragm between coil and opening controlled:
This subclass is indented under subclass 129.15. Subject
matter which includes a membranous member which separates the
coil from the opening controlled by the valve.
Subclass:
129.18
With means to adjust stroke of armature:
This subclass is indented under subclass 129.15. Subject
matter which includes a membranous member which separates the
coil from the opening controlled by the valve.
Subclass:
129.19
Lost motion between valve and valve actuator:
This subclass is indented under subclass 129.15. Subject
matter which includes means which provides for movement of
either the valve or the valve actuator while the other is
stationary during a portion of the time of actuation.
Subclass:
129.20
Mechanical movement between valve and solenoid:
This subclass is indented under subclass 129.15. Subject
matter wherein a mechanical movement is provided between the
valve and solenoid.
SEE OR SEARCH THIS CLASS, SUBCLASS:
58 for fluid actuated valves having a mechanical movement
between the actuator and the valve.
213 for mechanical movement actuators for valves in general,
and see the search notes thereto.
Subclass:
129.21
Coil surrounds valve port or flow line:
This subclass is indented under subclass 129.15. Subject
matter wherein the coil is arranged around the passage so
that flow is through the coil.
(1) Note. The passage may be a valve port adjunct.
(2) Note. The incidental heat exchange resulting from this
arrangement is not sufficient basis for classification as a
heat exchange device.
SEE OR SEARCH CLASS:
137, Fluid Handling, subclass 341 for electric heating
elements for fluid handling systems, and see the search notes
thereto. See (2) Note.
Subclass:
129.22
Solenoid within flow line:
This subclass is indented under subclass 129.15. Subject
matter wherein the passage is external to and surrounds the
solenoid.
(1) Note. The passage may be a valve port adjunct.
(2) Note. The incidental heat exchange resulting from this
arrangement is not sufficient basis for classification as a
heat exchange device.
SEE OR SEARCH CLASS:
137, Fluid Handling, subclass 341 for electric heating
elements for fluid handling systems, and see the search notes
thereto. See (2) Note.
Subclass:
142
This subclass is indented under the class definition.
Subject matter in combination with a flow path wherein the
combination relationship is specifically set forth.
SEE OR SEARCH CLASS:
137, Fluid Handling, 561 for distribution systems including
details of the flow path which go beyond the cooperative
relation thereof with a valve or its actuator, and subclasses
798+ for a flow line coupling forming part of a fluid
handling system.
138, Pipes and Tubular Conduits, subclass 43, 45 and 46 for a
flow pipe with variable restrictor.
Subclass:
143
This subclass is indented under subclass 142. Subject matter
wherein the combination relationship includes means for
mounting the valve on, or supporting it from, the flow path.
SEE OR SEARCH CLASS:
137, Fluid Handling, subclass 507 for reactor surface type
condition responsive valves with means for mounting them in
the system.
Subclass:
144
This subclass is indented under subclass 142. Subject matter
wherein the flow path is a tank.
SEE OR SEARCH CLASS:
137, Fluid Handling, 123 for tanks combined with siphons,
especially subclass 151 for valves or closures in the siphon
flow path, subclasses 219+ for Larner-Johnson type valves, in
which a telescoping valve member lies inside the flow path,
subclasses 255+ for plural tanks with parallel flow,
subclasses 317+ for means for tapping a tank or keg under
pressure, subclasses 373 and 376 for tank supports,
subclasses 386+ for liquid level response or maintenance,
subclass 548 for valved tank inlets or outlets provided with
a strainer, subclasses 571+ for plural tanks connected in
series, subclass 581 for movable tanks, subclasses 582 to
616+ for tanks with movable, plural, internally extended and
other special forms of inlet and outlet, subclasses 624.11+
for a distribution system including a programmer or a timer
and subclasses 625+ for a multiway valve unit.
222, Dispensing, subclasses 420-574 for dispensing tanks of
the gravity type.
285, Pipe Joints or Couplings, 149.1 for a pipe or cable and
box coupling, subclasses 136.1+ for a pipe or
rod-to-pipe-to-plate coupling, and subclasses 189+ for a pipe
end-to-plate coupling, especially subclass 193 wherein the
pipe end is a faucet part.
Subclass:
145
This subclass is indented under subclass 142. Subject matter
wherein the valve controls a flow path which is located on
the side of a pipe, the valve being secured or applied to the
side of the pipe or comprising a unitary flow passage and
controller applied to an outlet in the circumferential wall
of the pipe.
SEE OR SEARCH CLASS:
137, Fluid Handling, subclass 143 for siphon venting or
breaking, subclasses 173+, 177+, 197+ and 203 for outlets for
either gas or liquids in fluid separating traps, subclasses
216+ for back-flow preventing air vents in liquid flow lines,
subclasses 272+ for hydrant valves in water mains, especially
subclass 299 for valves for hydrant outlets, subclasses 317+
for devices for tapping a pipe under pressure, subclass 480
for auxiliary inlet valves in combustion engine induction
lines, subclasses 596+ for distribution systems involving
drain or stop and waste valves, and see the search notes
thereto and subclasses 872+ for distribution systems having a
flow control means for plural passages comprising a valve or
deflector at the junction of such passages.
Subclass:
146
This subclass is indented under subclass 145. Subject matter
wherein the valve and/or mounting is made in parts to clamp
around the pipe.
Subclass:
147
This subclass is indented under subclass 142. Subject matter
wherein the flow path is a pipe, the closing-element seating
against the end thereof or against a seat surrounding or
immediately within the end.
SEE OR SEARCH THIS CLASS, SUBCLASS:
299 for pivoted valves mounted externally of the valve
body.
SEE OR SEARCH CLASS:
137, Fluid Handling, 223 for tire filling chucks and/or
stems, subclasses 409+ for float controlled valves,
especially subclasses 442+ for terminal float arm operated
valves of the reciprocating type, subclasses 469+ for pop
type safety valves and subclass 562 and 603 for faucet
attached flow elements.
Subclass:
148
This subclass is indented under subclass 142. Subject matter
wherein the flow path includes a pipe coupling or union.
SEE OR SEARCH THIS CLASS, SUBCLASS:
149 for a valved pipe joint wherein the valve is operated by
the coupling act.
149.9 for a valve pipe joint wherein the valve, or its
actuator, is interlocked with the coupling means.
155 for valves combined with nozzles and spouts, and see the
search notes thereto.
SEE OR SEARCH CLASS:
137, Fluid Handling, subclass 231 for a coupling means for
an inflatable article (e.g., tire filling chuck, tire filling
stem, etc.), subclasses 315.01-329.4 for a fluid handling
system with repair, tapping, assembly, or disassembly means,
subclasses 479-484 for a valve responsive to induction from
an internal combustion engine, subclasses 515-515.7 for a
direct response valve (i.e., check valve) in couplings for
coaxial conduits (e.g., drill pipe check valve, safety valve,
etc.), subclasses 614-614.06 for a flow line section with
serial valves or closures having a separable flow line
section, valve, or closure in each separable, valved, flow
line sections, or subclass 637.05 for valves with separate,
correlated actuators correlated across a separable flow line
joint.
141, Fluent Material Handling, With Receiver or Receiver
Coacting Means, subclass 335, 336, 348+, and 351+ for a
valved joint between a portable supply and a receiver, the
valve being operated by the act of connecting or
disconnecting them.
Subclass:
149
This subclass is indented under subclass 142. Subject matter
wherein the closing element is carried by one flow path
section, the joining or disconnecting of another flow path
section with respect thereto serving to operate the
closing-element.
SEE OR SEARCH THIS CLASS, SUBCLASS:
89.5 for valve actuator blocking or disabling means
including a flow path joint.
339 for valve actuating devices extending through the fluid
inlet or outlet.
340 for valve actuators surrounding the flow conduit.
341 for valve actuators comprising the valve casing or an
extension thereof.
349 for valve actuators comprising the inlet outlet for the
valve casing.
SEE OR SEARCH CLASS:
137, Fluid Handling, subclasses 223-234.5 for an inflatable
article (e.g., tire filling chuck or stem, etc.), subclass
599.02 for systems dividing into parallel flow lines then
recombining having a valved flow line coupling actuated by
joining or parting (e.g., quick disconnect hose, etc.), or
subclass 614.05 for systems having flow line with serial
valves or closures where a valve or closure is operated by
coupling.
141, Fluent Material Handling, With Receiver or Receiver
Coacting Means, 348 for supply means carried receiver flow
control opening means, and subclasses 351+ for receiver
actuated supply discharge means.
Subclass:
149.1
This subclass is indented under subclass 149. Subject matter
wherein the flow path sections are moved in such a manner as
to have a linear component of motion with respect to each
other, this motion of the sections serving to operate the
closing-element.
SEE OR SEARCH CLASS:
137, Fluid Handling, 614.03 for separable valved, flow path
sections, for valve in each section being operated by a
linear component of coupling motion of the sections.
Subclass:
149.2
This subclass is indented under subclass 149.1. Subject
matter wherein the closing-element is mounted for rotating or
hinging motion.
Subclass:
149.3
This subclass is indented under subclass 149.1. Subject
matter wherein the closing-element moves transversely to, or
in the opposite direction of, the linear component of motion
of the flow path sections.
Subclass:
149.4
This subclass is indented under subclass 149.1. Subject
matter wherein the means for joining the flow path sections
includes a screw thimble or equivalent structure, the act of
turning the screw thimble in the making of the joint
resulting in the linear component of motion.
SEE OR SEARCH CLASS:
285, Pipe Joints or Couplings, subclass 354 and 386+ for
screw thimble type pipe joints.
Subclass:
149.5
This subclass is indented under subclass 149.1. Subject
matter wherein the flow path sections are joined by the act
of rotating one section with respect to the other, the
rotation resulting in the linear component of motion.
Subclass:
149.6
This subclass is indented under subclass 149.1. Subject
matter wherein the closing-element is spring biased and this
spring opposes the linear component of motion.
Subclass:
149.7
This subclass is indented under subclass 149.6. Subject
matter wherein no means, other than that which will release
upon application of excessive forces, is included for holding
the flow path sections against the spring bias.
SEE OR SEARCH CLASS:
285, Pipe Joints or Couplings, subclass 9 and 304 for
contact only and for friction detent type pipe joints
respectively.
Subclass:
149.8
This subclass is indented under subclass 142. Subject matter
wherein the closing-element and flow path are relatively
movable, the closing-element being operated as the result of
imparting motion to the flow path.
SEE OR SEARCH THIS CLASS, SUBCLASS:
149 for a separable, valved, flow path wherein the valve is
operated by the act of coupling the flow path sections.
SEE OR SEARCH CLASS:
137, Fluid Handling, subclasses 355.18-315.19 for a hose
storage or retrieval means having a flow regulation means
responsive to hose movement, subclass 515 for a line
condition changed direct response valve (i.e., check valve
type) in a coupling for coaxial conduits (e.g., drill pipe
check valve, etc.), subclass 599.02 for systems dividing into
parallel flow lines then recombining having a valved flow
line coupling actuated by joining or parting (e.g., quick
disconnect hose, etc.), or subclass 616 for distribution
systems having an articulated or swinging flow conduit that
actuates a valve.
166, Wells, subclass 334.1 and the subclasses there noted
for well devices with valves actuated by movement of the
conduit carrying the valve, and see subclass 316 for the line
between Classes 166 and 251.
222, Dispensing, 526 for movable material discharge guides
having various valve means associated therewith.
Subclass:
149.9
This subclass is indented under subclass 142. Subject matter
wherein the closing-element is carried by one flow path
section and another flow path section is detachably joined
thereto, operation of the closing-element to a particular
position being a prerequisite to attaching or detaching the
joined sections.
SEE OR SEARCH THIS CLASS, SUBCLASS:
89.5 for a valve in one flow path section, a second flow
path section detachably connected to the first section and
means associated with the connecting means for blocking or
disabling the valve actuator.
Subclass:
150
This subclass is indented under subclass 148. Subject matter
wherein the pipe coupling allows adjustable positioning of
the valve and coupled conduits.
Subclass:
151
This subclass is indented under subclass 148. Subject matter
wherein the pipe coupling may be assembled with the conduits
without rotation of said conduits.
SEE OR SEARCH CLASS:
285, Pipe Joints or Couplings, appropriate subclasses,
especially subclass 304 for a friction detent coupling, and
subclasses 305+ for a coupling having holding means
comprising an essential catch, for pipe joints and couplings,
per se.
Subclass:
152
This subclass is indented under subclass 148. Devices in
which the valve seat and a pipe coupling element are a
unitary subassembly.
SEE OR SEARCH CLASS:
137, Fluid Handling, subclasses 15.08-15.17 for a process
of cleaning, repairing, or assembling by securing, replacing
or servicing a pipe, joint, valve, or tank.
Subclass:
153
This subclass is indented under subclass 142. Subject matter
wherein the outlet or inlet is extended away from the valve
or is provided with a means for deflecting the fluid stream.
(1) Note. In order to come within the purview of this or
the indented subclasses the particular feature of the outlet
or the inlet must be definitely claimed.
SEE OR SEARCH THIS CLASS, SUBCLASS:
118 for valved flow paths combined with material guides or
restrictors other than nozzle or outlet shapes and see the
search notes thereto.
SEE OR SEARCH CLASS:
137, Fluid Handling, subclass 299 for valved hydrant outlets
and subclasses 590+ for distribution systems comprising a
tank with internally extending flow guides.
220, Receptacles, 86.1 for tank filling attachments.
222, Dispensing, subclasses 519-540 for dispenser outlet
guides combined with valves, subclasses 547 and 564 for
dispensers with interior material guides, and subclasses 566+
for dispenser nozzles, spouts and pouring devices.
Subclass:
154
This subclass is indented under subclass 153. Subject matter
wherein a surface is provided at an angle, i.e., not parallel
to the outlet stream and against which the outlet stream is
impinged.
SEE OR SEARCH CLASS:
137, Fluid Handling, subclass 431 for a float surrounding an
inlet pipe and acting as a spreader for the flow, subclass
437 for external hood or deflector surrounding a
float-controlled inlet and subclasses 872+ for deflectors at
junctions in connection with flow control means for plural
passages.
138, Pipes and Tubular Conduits, subclass 46.5 for pipes and
tubular conduits with discharge deflectors.
193, Conveyors, Chutes, Skids, Guides, and Ways, appropriate
subclasses, for conveyor type chutes.
222, Dispensing, 566 for dispensing nozzles, spouts and
pouring devices.
239, Fluid Sprinkling, Spraying, and Diffusing, 380 and
subclasses 498-524 for spray devices combined with solid
surfaces against which the fluid stream is impinged.
406, Conveyors: Fluid Current, 157 for material dischargers
for pneumatic conveyors.
Subclass:
155
This subclass is indented under subclass 153. Subject matter
wherein the outlet is a terminal element, i.e., a nozzle or
spout, either for inlet or outlet purposes.
SEE OR SEARCH CLASS:
137, Fluid Handling, 872 for deflectors including spouts at
junctions, in connection with flow control means for plural
passages in distribution systems, subclasses 615+ for
articulated and swinging conduits, including nozzles and
spouts, comprised in distribution systems and subclass 801
for nozzles and spouts, per se, and see the search notes
thereto.
222, Dispensing, 526 for movable spouts for dispensers and
subclasses 566+ for dispensing nozzles, spouts and pouring
devices, and see section 19 of the class definition of Class
222.
Subclass:
156
This subclass is indented under subclass 155. Devices
wherein the actuator is related to the outlet in such a
manner that the valve may be actuated by a receiver which is
presented to the nozzle to receive the discharge from the
nozzle.
Subclass:
157
This subclass is indented under the class definition.
Devices which have means other than that which actuates or
biases to valve open or closed position, to increase the
contact pressure between valve and seat.
SEE OR SEARCH THIS CLASS, SUBCLASS:
56 for fluid actuated plural operations including means to
increase the head and seat contact pressure.
SEE OR SEARCH CLASS:
137, Fluid Handling, subclass 246.2 for this means combined
with means for liquid sealing at the valve interface.
Subclass:
158
This subclass is indented under subclass 157. Devices having
means to also positively return the valve or seat from its
extra seat or head contacting condition.
SEE OR SEARCH CLASS:
137, Fluid Handling, subclass 246.18 and 246.19 for means
for reducing the pressure in combination with liquid sealing
at the valve interface.
Subclass:
159
This subclass is indented under subclass 158. Devices in
which the seat is pressed against the valve head.
Subclass:
160
This subclass is indented under subclass 158. Subject matter
wherein the valve member is of the rotary type, e.g., plug or
disk.
Subclass:
161
This subclass is indented under subclass 160. Subject matter
wherein the means to increase the seating pressure is
operated by means independent of the means actuating the
valve.
SEE OR SEARCH CLASS:
137, Fluid Handling, 637 for a plurality of valves in a
distribution system provided with individual actuator
mechanisms.
Subclass:
162
This subclass is indented under subclass 160. Subject matter
wherein the means to increase and/or to reduce the seating
pressure comprises cam or wedge means.
SEE OR SEARCH THIS CLASS, SUBCLASS:
203 for other gate valves provided with cam or wedge means
that increase the seating pressure only.
Subclass:
163
This subclass is indented under subclass 162. Subject matter
having the cam or wedge means within the valve housing.
Subclass:
164
This subclass is indented under subclass 160. Subject matter
wherein the means to increase and reduce the seating pressure
comprises screw means.
Subclass:
165
This subclass is indented under subclass 164. Subject matter
wherein the actuator does not reciprocate with actuation.
Subclass:
166
This subclass is indented under subclass 165. Subject matter
wherein a clutch or slip coupling is provided between the
actuator and the valve to permit the valve to be relieved of
the additional seating pressure before actuation or to
increase the seating pressure after actuation.
Subclass:
167
This subclass is indented under subclass 158. Devices the
valve being bifaced with pressing means for both faces.
Subclass:
168
This subclass is indented under subclass 167. Devices
comprising threaded means between the valve face elements and
their carrier.
Subclass:
169
This subclass is indented under subclass 167. Devices
wherein the means comprises toggle mechanism.
Subclass:
170
This subclass is indented under subclass 157. Devices having
means to press or urge a seat against a valve head.
Subclass:
171
This subclass is indented under subclass 170. Subject matter
comprising compressible packing constituting a valve seat
which is compressed by a packing gland-like element.
SEE OR SEARCH CLASS:
277, Seal for a Joint or Juncture, for a generic sealing
means or process, 637 for a static contact seal for other
than an internal combustion engine, or a pipe, conduit, or
cable having a particular associated mounting or retaining
means.
Subclass:
172
This subclass is indented under subclass 170. Devices
applied by fluid pressure.
Subclass:
173
This subclass is indented under subclass 172. Devices in
which the valve is of the butterfly type.
SEE OR SEARCH THIS CLASS, SUBCLASS:
305 for other butterfly valves.
Subclass:
174
This subclass is indented under subclass 170. Devices the
seat being spring pressed.
Subclass:
175
This subclass is indented under subclass 157. Devices in
which the means comprises fluid pressure.
Subclass:
176
This subclass is indented under subclass 157. Subject matter
including a spring to press the head to the seat.
Subclass:
177
This subclass is indented under subclass 176. Devices the
valve being of the pivoted type.
Subclass:
178
This subclass is indented under subclass 177. Devices the
valve head having two seating faces which seat on oppositely
disposed seats in a single flow line.
Subclass:
179
This subclass is indented under subclass 177. Devices in
which the valve is mounted externally of the valve body.
Subclass:
180
This subclass is indented under subclass 176. Subject matter
wherein the valve is of the rotary type.
Subclass:
181
This subclass is indented under subclass 180. Subject matter
wherein the valve is a rotary plug.
Subclass:
182
This subclass is indented under subclass 181. Subject matter
wherein the spring expands separable sections which comprise
the valve head.
Subclass:
183
This subclass is indented under subclass 181. Subject matter
wherein the spring is enclosed by the valve housing or by an
auxiliary spring housing.
Subclass:
184
This subclass is indented under subclass 183. Subject matter
wherein the spring is between the plug and the actuating
means or at that end of the plug having the actuator.
Subclass:
185
This subclass is indented under subclass 180. Subject matter
wherein the pressing means comprises a spring exposed to the
line flow.
Subclass:
186
This subclass is indented under subclass 176. Devices of the
piston type.
Subclass:
187
This subclass is indented under subclass 157. Devices
comprising a different actuating means for valving and
pressing motion, or different functions of the same
actuator.
SEE OR SEARCH THIS CLASS, SUBCLASS:
161 for independent actuation of both pressure increase and
pressure reduction.
Subclass:
188
This subclass is indented under subclass 187. Subject matter
wherein the valve is of the rotary type.
SEE OR SEARCH THIS CLASS, SUBCLASS:
161 for similar independent actuators in rotary valves but
which also provided for positive reduction of the seating
pressure, and see the search notes to subclass 161.
Subclass:
189
This subclass is indented under subclass 187. Subject matter
comprising piston type valves provided with expansible
packing.
SEE OR SEARCH CLASS:
277, Seal for a Joint or Juncture, for a generic sealing
means or process, 637 for a static contact seal for other
than an internal combustion engine, or a pipe, conduit, or
cable having a particular associated mounting or retaining
means.
Subclass:
190
This subclass is indented under subclass 157. Subject matter
wherein the valve is of the piston type.
SEE OR SEARCH CLASS:
137, Fluid Handling, subclass 538 for line condition change
responsive piston valves, and subclasses 625.37+ for piston
valves where the flow is divided and recombined.
Subclass:
191
This subclass is indented under subclass 190. Subject matter
wherein the piston rings or the packing upon closing of the
valve are expanded.
SEE OR SEARCH CLASS:
277, Seal for a Joint or Juncture, for a generic sealing
means or process, 637 for a static contact seal for other
than an internal combustion engine, or a pipe, conduit, or
cable having a particular associated mounting or retaining
means.
Subclass:
192
This subclass is indented under subclass 157. Subject matter
comprising rotary valves.
Subclass:
193
This subclass is indented under subclass 157. Devices
applied to a gate valve to move its face element in a
direction lateral to that of movement of a valve element
carrier toward the valve seat.
SEE OR SEARCH THIS CLASS, SUBCLASS:
177 for pivoted gates with spring means to increase head and
seat contact pressure.
Subclass:
194
This subclass is indented under subclass 193. Devices
comprising a screw actuator so associated with the valve
faces and the means to press them to their seats that it
alone causes relative movement of them.
Subclass:
195
This subclass is indented under subclass 193. Devices for
valve being bifaced with pressing means for both faces.
Subclass:
196
This subclass is indented under subclass 195. Devices the
valve head having also a flow passage the boundary of which
is expanded when the valve is in open position.
Subclass:
197
This subclass is indented under subclass 195. Devices which
are carried by an expander which continues its movement after
the face elements have been stopped by contact with the valve
body.
SEE OR SEARCH THIS CLASS, SUBCLASS:
204 for similar structures in single-faced gates.
Subclass:
198
This subclass is indented under subclass 197. Devices
including also a second expanding surface which comes into
play as the valve approaches or reaches the limit of its
closing movement.
(1) Note. This second expanding surface is usually either a
part of a carried expander as in subclass 200 or is fixed to
the valve casing as in subclass 202.
Subclass:
199
This subclass is indented under subclass 197. Devices in
which the valve face movement is stopped by direct contact
with the valve casing at a position other than the valve
seat.
Subclass:
200
This subclass is indented under subclass 195. Devices in
which an expander element is brought into operation by
contact with the valve body before the face elements have
reached their furthermost closing positions.
SEE OR SEARCH THIS CLASS, SUBCLASS:
198 for carried expanders combined with expanders which move
after the faces are stopped.
Subclass:
201
This subclass is indented under subclass 200. Devices in
which the expander pivots on contacting the valve casing.
Subclass:
202
This subclass is indented under subclass 195. Devices in
which the valve faces are moved into contact with an
expanding surface which is relatively fixed to the valve
casing.
Subclass:
203
This subclass is indented under subclass 193. Subject matter
wherein the means to press the valve to its seat includes a
wedge or cam.
Subclass:
204
This subclass is indented under subclass 203. Subject matter
wherein the wedge or cam moves with respect to both the head
and seat.
(1) Note. For mere adjustment of the cam or wedge with
respect to the seat, see subclass 203.
Subclass:
205
This subclass is indented under the class definition.
Devices which include flow controllers provided with means
for micro-adjustment of the flow selectively between minimum
and maximum extremes.
SEE OR SEARCH THIS CLASS, SUBCLASS:
122 for selective controllers in series, one of which is a
valve.
SEE OR SEARCH CLASS:
137, Fluid Handling, subclass 625.3 for valves which vary
the flow through plural paths simultaneously.
Subclass:
206
This subclass is indented under subclass 205. Devices in
which the means for varying the flow includes a plurality of
passages through the valve head each being of a different
size from the others.
Subclass:
207
This subclass is indented under subclass 206. Devices in
which the valve is of the plug type.
Subclass:
208
This subclass is indented under subclass 205. Devices in
which the flow controller is a rotary valve.
Subclass:
209
This subclass is indented under subclass 208. Devices in
which the valve is of the plug type.
Subclass:
210
This subclass is indented under the class definition.
Devices in which a single flow line has a plurality of
serially associated flow controlling positions which are
sequentially closed or opened by a valve unit.
(1) Note. Included herein as such are anti-scoring means
wherein one valve seat or head is protected from wire drawing
by the control of the flow by a second valve until the first
valve is fully opened or closed.
SEE OR SEARCH THIS CLASS, SUBCLASS:
118 for anti-scoring means where the flow is controlled by a
restrictor until the valve is fully opened or closed.
SEE OR SEARCH CLASS:
137, Fluid Handling, subclass 625.39 for similar structures
which also include dividing and recombining of the flow and
subclasses 627.5 and 628+ for sequential actuation of plural
valves.
Subclass:
211
This subclass is indented under the class definition. Valve
units comprising a single flow path provided with a pair of
serially arranged seat members with which plural
seat-engaging elements of a single valve head alternately
cooperate.
Subclass:
212
This subclass is indented under the class definition.
Devices constructed of a plurality of relatively movable flow
obstructing elements, which collectively close a single
port.
SEE OR SEARCH THIS CLASS, SUBCLASS:
1.1 for plural annular segments constructed to close about a
rod or pipe.
SEE OR SEARCH CLASS:
250, Radiant Energy, 229 for iris diaphragms for
pre-photocell light control.
359, Optics: Systems (Including Communication) and Elements,
227 for light control by means of movable opaque elements.
Subclass:
213
This subclass is indented under the class definition.
Subject matter wherein a valve is actuated by mechanical
movement means, i.e., means comprising two or more fixed and
movable parts so combined that the motion of one compels or
completely controls or constrains motion of the other
according to a law of operation inherent in and depending on
the nature of the combination.
SEE OR SEARCH THIS CLASS, SUBCLASS:
58 for mechanical movements between a fluid pressure
actuator and a valve.
66 for biased trip valves and see the search notes thereto.
74 for mechanical movements to actuate a biased trip
mechanism.
75 for snap actuated mechanisms for valve actuation.
76 for valve actuators comprising impact devices.
77 for valve actuators in which lost motion is inherent.
294 for flexible actuators, as Bowden wires and chains.
295 for pedal actuators for valves.
336 for biased valves.
340 341+ and 349+, for actuators which are a part of the flow
line.
SEE OR SEARCH CLASS:
74, Machine Element or Mechanism, appropriate subclasses, for
mechanical movements, per se.
137, Fluid Handling, subclass 315.14 for a fluid handling
system with assembling, disassembling, mounting, or removing
a faucet having a particular mechanical actuator, subclasses
315.35-315.4 for a particular mechanical actuator of a valve
with repair, tapping, assembly, or disassembly means,
subclasses 434-451 for a float arm operated valve, subclass
513 for plural mechanically interconnected check valves,
subclass 601.12 for systems dividing into parallel flow lines
then recombining including valves having a common operator
therefor and mechanical motion of actuator for other than a
rotary valve, subclass 601.15 for systems dividing into
parallel flow lines then recombining having a mechanical
motion of a valve actuator, or subclass 625-625.5 for a fluid
handling system having a multi way valve that may include a
mechanical movement.
222, Dispensing, 505 for relatively movable actuators for
dispenser valves.
267, Spring Devices, subclass 123, for a fluid spring device
of the diaphragm type, useful in valve actuation.
Subclass:
214
This subclass is indented under subclass 213. Devices
wherein the valve stem and/or actuator is particularly
associated with means to pack or seal it to prevent leakage
of fluid between the inside and outside of the valve body
(e.g., as where the actuating screw threads are enveloped by
the packing).
SEE OR SEARCH CLASS:
137, Fluid Handling, subclass 315.28 for a reciprocating
valve having a particularly packed or sealed mechanical
movement actuator with assembling or disassembling means.
277, Seal for a Joint or Juncture, for a generic sealing
means or process, 500 for a dynamic, circumferential,
contact seal for other than a piston.
Subclass:
215
This subclass is indented under subclass 213. Subject matter
wherein the mechanical movement produces plural motions of
the valves or valve components which motions are concurrent
or consecutive.
(1) Note. An example of a mechanical movement which
produces plural concurrent motions of a valve is one wherein
the valve element is mounted on a screw device. Actuation of
the screw both rotates and reciprocates the valve element.
SEE OR SEARCH THIS CLASS, SUBCLASS:
56 for plural movements of a fluid pressure operated valve.
84 for valve heads movably connected to the stem or support
so that they can accommodate themselves to the seat.
SEE OR SEARCH CLASS:
123, Internal-Combustion Engines, 90.28, for poppet valve
operating mechanism which provides for nonvalving movement of
the valve.
137, Fluid Handling, subclasses 330-333 for nonvalving
motion of a valve or valve seat, subclass 315.36 for a
particular mechanical actuator providing plural motions of a
valve flow control member with repair, tapping, assembly, or
disassembly means, subclass 873 for movable deflector-spouts,
in a lateral port of a fluid flow line, having plural
motions, or subclass 616.3 for a valve having plural motions
actuated by an articulated or swinging flow conduit.
Subclass:
216
This subclass is indented under subclass 215. Devices in
which the thread element of at least one part of the screw is
structurally a part of the valve controlled passage so that
it is contacted by the fluid in the passage.
Subclass:
217
This subclass is indented under subclass 215. Devices
wherein the valve head is mounted on the valve stem between
the screw threads and the handle or other actuator.
Subclass:
218
This subclass is indented under subclass 215. Devices in
which the coacting mechanical movement elements are
completely enclosed within the valve body.
SEE OR SEARCH THIS CLASS, SUBCLASS:
214 for packed or sealed valve stems wherein some special
relationship exists between the elements of the valve and the
sealing means.
274 for similar structure having valve heads which have a
single motion.
Subclass:
219
This subclass is indented under subclass 218. Devices in
which the actuator is connected to a screw element of the
valve by threadless, longitudinally splined, or slip coupling
means.
Subclass:
220
This subclass is indented under subclass 219. Devices in
which the coupling socket is formed in the screw element.
Subclass:
221
This subclass is indented under subclass 218. Devices in
which one of cooperating thread elements is formed within or
upon a sleeve-like element which is detachable or removable
from the valve body.
SEE OR SEARCH CLASS:
137, Fluid Handling, subclass 243.5 for actuators of this
type having special provision for grinding the valve on its
seat.
Subclass:
222
This subclass is indented under subclass 221. Devices in
which the sleeve is removably mounted in the bonnet.
Subclass:
223
This subclass is indented under subclass 221. Devices in
which the bonnet is threaded and thus becomes the sleeve.
Subclass:
224
This subclass is indented under subclass 221. Devices in
which the sleeve is mounted by an integral flange extending
between adjacent body sections, usually the bonnet and the
body.
Subclass:
225
This subclass is indented under subclass 215. Device in
which one of the cooperating thread elements is formed within
or upon a sleeve-like element which is detachable or
removable from the valve body.
SEE OR SEARCH THIS CLASS, SUBCLASS:
221 for removable sleeves encased in the valve casing.
SEE OR SEARCH CLASS:
137, Fluid Handling, subclass 243.5 for actuators of this
type having special provision for grinding the valve on its
seat.
Subclass:
226
This subclass is indented under subclass 215. Devices in
which means are provided to bias the valve to open or closed
position.
Subclass:
227
This subclass is indented under subclass 226. Devices in
which the biasing means is a spring.
Subclass:
228
This subclass is indented under subclass 213. Devices in
which a reciprocating stem is connected to or associated with
a pivoted valve whereby reciprocation of the stem operates
the valve.
Subclass:
229
This subclass is indented under subclass 213. Subject matter
wherein two or more motions involving different mechanical
movements cause operation of the valve.
(1) Note. The plural dissimilar mechanical movements may
comprise a single actuating means, or a plurality of
independent or interconnected actuating means.
(2) Note. The use of a flexible member, such as a cable,
chain or rope, attached to a valve operating mechanical
movement is not considered to comprise two mechanical
movements for classification herein. Such mechanisms are
classified in the appropriate following mechanical movement
subclasses and cross-referenced as required in subclass 294.
SEE OR SEARCH THIS CLASS, SUBCLASS:
294 for devices in which a flexible member, such as a cable,
chain or rope is attached to an arm which is connected
directly to the valve or valve stem. See (2) Note.
SEE OR SEARCH CLASS:
137, Fluid Handling, subclass 446 for float arm actuated
valves having an interposed cam, gear or screw mechanical
movement.
Subclass:
230
This subclass is indented under subclass 213. Subject matter
wherein the valve actuation means includes an intermittent
grip device of the pawl and ratchet type to convert a motion
of an operating member to a one-way motion of the valve in
the direction desired.
SEE OR SEARCH CLASS:
74, Machine Element or Mechanism, 111 for mechanical
movements of the intermittent grip type.
Subclass:
231
This subclass is indented under subclass 213. Subject matter
wherein the mechanical movement actuator includes an
elongated rigid means pivoted at one point to a support and
having the actuating power and the valve connection at two
other points.
SEE OR SEARCH CLASS:
74, Machine Element or Mechanism, appropriate subclasses, for
mechanical movement actuators including a lever.
137, Fluid Handling, subclass 315.37 for a particular lever
type actuator of a valve with repair, tapping, assembly, or
disassembly means, or subclasses 434-451 for a float arm
operated valve, especially subclass 445 for a float arm
operated valve having a toggle or second lever connected to
the valve.
Subclass:
232
This subclass is indented under subclass 231. Apparatus
comprising a plurality of serially related levers generally
with pivot pin connections to each other and to the valve.
Subclass:
233
This subclass is indented under subclass 231. Subject matter
wherein the lever is so arranged that its effective length
varies as the lever swings through its actuating range, to
vary the relation between effective force and the resistance
of the actuated valve at various stages of its movement.
SEE OR SEARCH THIS CLASS, SUBCLASS:
237 for levers having sliding contact wherein there is no
appreciable mechanical advantage obtained by the sliding
contact.
SEE OR SEARCH CLASS:
137, Fluid Handling, subclass 531 for valves having direct
response to condition change in which a reciprocating valve
has a variable lever arm biasing means.
Subclass:
234
This subclass is indented under subclass 231. Subject matter
wherein means are provided for adjusting the fulcrum of the
lever or the length of the lever with relation to the fulcrum
and/or valve, the adjustment being made during non-operative
periods and not being affected by the valve actuating
operation.
(1) Note. See the class definition of Class 137, section 5,
for search notes on manual valve actuation and adjustment of
valve actuating means.
SEE OR SEARCH CLASS:
137, Fluid Handling, subclass 426 for float operative valves
with level adjusting or selecting means.
Subclass:
235
This subclass is indented under subclass 231. Apparatus
wherein there is included a swivel connection in the lever
mechanism.
Subclass:
236
This subclass is indented under subclass 231. Apparatus
having the valve biased either to open or to closed
position.
Subclass:
237
This subclass is indented under subclass 236. Valves wherein
the three points are in a common plane and there is an
unrestrained sliding connection between the valve and the
elongated rigid means; the sliding contact herein affords no
appreciable mechanical advantage.
SEE OR SEARCH THIS CLASS, SUBCLASS:
233 for devices having leverage variable during operation.
Subclass:
238
This subclass is indented under subclass 237. Valves wherein
the valve is spring biased.
Subclass:
239
This subclass is indented under subclass 238. Valves wherein
the spring is co-axial with the valve stem.
Subclass:
240
This subclass is indented under subclass 239. Valves wherein
the spring reacts with a stop (e.g., a collar) on the valve
stem and the valve is pulled to its seat.
Subclass:
241
This subclass is indented under subclass 239. Valves wherein
the spring reacts with the guide for the valve stem.
Subclass:
242
This subclass is indented under subclass 236. Apparatus
wherein the bias is provided by spring means.
Subclass:
243
This subclass is indented under subclass 242. Apparatus
wherein the spring co-acts with or through the lever to
provide the bias to the valve.
Subclass:
244
This subclass is indented under subclass 242. Apparatus
wherein the spring is co-axial with the valve stem.
Subclass:
245
This subclass is indented under subclass 244. Apparatus
wherein the spring abuts a stop (e.g., a collar) on the valve
stem and thereby the valve head is pulled to its seat.
Subclass:
246
This subclass is indented under subclass 244. Apparatus
wherein the spring abuts the guide for the valve stem and
thereby the valve head is pushed to its seat.
Subclass:
247
This subclass is indented under subclass 236. Apparatus
wherein the bias is provided by gravity.
SEE OR SEARCH THIS CLASS, SUBCLASS:
338 for other weight biased valves.
SEE OR SEARCH CLASS:
137, Fluid Handling, 519 and 532+ for direct response valves
which are weight biased.
Subclass:
248
This subclass is indented under subclass 213. Subject matter
wherein the mechanical movement actuator includes (1)
relatively movable toothed members, round, linear or
irregular, which transmit motion by meshing of the teeth
during travel of the members, and (2) friction gearing, in
which the members lack teeth, and force is transmitted by
pressing one moving surface against the other, including
those having one endless flexible member or belt.
SEE OR SEARCH CLASS:
74, Machine Element or Mechanism, 640 for gearing, per se.
137, Fluid Handling, subclass 446 for float arm actuated
valves having an interposed gear.
475, Planetary Gear Transmission Systems or Components, for
planetary gearing, per se.
Subclass:
249
This subclass is indented under subclass 248. Subject matter
wherein the gearing provides for interrupted or intermittent
motion, caused by gear having irregular or discontinuously
spaced teeth or indentations.
SEE OR SEARCH CLASS:
74, Machine Element or Mechanism, subclass 435, 436 and 437
for mutilated and Geneva gearing, per se.
Subclass:
249.5
This subclass is indented under subclass 248. Subject matter
wherein the gearing includes a rotary ember having coaxial,
helical thread means on its outer surface meshing with gear
means.
Subclass:
250
This subclass is indented under subclass 248. Subject matter
wherein the gearing includes a straight bar with teeth on one
face.
Subclass:
250.5
This subclass is indented under subclass 248. Subject matter
wherein the gearing includes meshing segments or sectors.
Subclass:
251
This subclass is indented under subclass 213. Subject matter
wherein the mechanical movement actuator comprises an
eccentrically mounted rotating or swinging member, the
varying radii of which produce varying positions of the
valve.
SEE OR SEARCH THIS CLASS, SUBCLASS:
213 for movements consisting of a rotatable element provided
with a helical rib or groove and another element co-acting
therewith through a pin or the like, engaging said groove or
rib.
SEE OR SEARCH CLASS:
74, Machine Element or Mechanism, appropriate subclasses
under mechanical movements, for cam type movements and 567
for cams, per se.
137, Fluid Handling, subclass 315.39 for a particular cam
type actuator of a valve with repair, tapping, assembly, or
disassembly means, or subclass 446 for a float arm actuated
valve with interposed cam, gear, or threaded connection.
Subclass:
252
This subclass is indented under subclass 251. Devices
comprising a helical rib or surface the longitudinal axis of
which is co-axial with or parallel to the axis along which
the valve reciprocates.
Subclass:
253
This subclass is indented under subclass 252. Devices in
which the valve has one position which it will maintain under
the influence of a spring or weight which comprises a biasing
means.
Subclass:
254
This subclass is indented under subclass 253. Devices having
plural cam surfaces arranged for actuation by selective
rotation in opposite angular directions.
Subclass:
255
This subclass is indented under subclass 254. Devices in
which the external means includes a handle which is rotatable
but does not reciprocate.
Subclass:
256
This subclass is indented under subclass 253. Subject matter
wherein the cam means is housed by the valve body or bonnet.
Subclass:
257
This subclass is indented under subclass 251. Devices in
which the cam elements are encased within the valve body
structure with a seal or packing externally of the elements.
SEE OR SEARCH CLASS:
277, Seal for a Joint or Juncture, for a generic sealing
means or process, 628 for a static contact seal for other
than an internal combustion engine, or a pipe, conduit, or
cable.
Subclass:
258
This subclass is indented under subclass 257. Devices in
which the cam element has symmetrically arranged cam surfaces
which permit actuation of the valve by rotation of an
actuating stem in either of two directions.
Subclass:
259
This subclass is indented under subclass 257. Devices in
which the cam is a finger like element which extends from a
rotating shaft at right angles to its axis.
(1) Note. The patents in this subclass differ from those in
subclasses 237+ in that in the former the operating handle
and the cam element are longitudinally spaced on the shaft,
while in the latter the operating handle, the cam element and
the pivot all operate in the same plane.
Subclass:
260
This subclass is indented under subclass 257. Subject matter
wherein the cam comprises a rock shaft which has an off-set
rod-like portion that has an axis perpendicular to the axis
of the valve head.
Subclass:
261
This subclass is indented under subclass 257. Subject matter
wherein the cam comprises a rock shaft which has an off-set
rod-like portion that has an axis perpendicular to the axis
of the valve head, the off-set portion being connected to the
rock shaft by two arms (i.e., U-shaped).
Subclass:
262
This subclass is indented under subclass 251. Devices in
which the valve has one position which it will maintain under
the influence of a spring or weight which comprises a biasing
means.
Subclass:
263
This subclass is indented under subclass 262. Devices in
which the biasing means is a spring.
Subclass:
264
This subclass is indented under subclass 213. Subject matter
wherein the mechanical movement comprises means having a
continuous helical rib which is operable to reciprocate the
movable valve member through connecting means but which does
not impart the rotary motion of the screw to the valve
member.
SEE OR SEARCH THIS CLASS, SUBCLASS:
82 for screw actuated valves wherein the actuator is
nonpositively connected to the valve head so that there is
manual control in both closed and open position.
84 for valve heads movably connected to the stem for
accommodation to the valve seat.
215 for screw type actuators in which the rotary movement of
the screw is transmitted to the movable valve member.
SEE OR SEARCH CLASS:
137, Fluid Handling, subclass 315.40 for a particular screw
type actuator of a valve with repair, tapping, assembly, or
disassembly means.
Subclass:
265
This subclass is indented under subclass 264. Devices having
plural sets of threads which co-act to accelerate the motion
of the valve head.
Subclass:
266
This subclass is indented under subclass 264. Devices in
which the actuation initiating portion of the screw has only
rotary motion.
Subclass:
267
This subclass is indented under subclass 266. Devices which
are internally threaded.
Subclass:
268
This subclass is indented under subclass 267. Subject matter
wherein the actuator has a cup-shaped end with internal
threads therein and the cup-shaped end encloses the end of
the valve stem.
Subclass:
269
This subclass is indented under subclass 268. Subject matter
wherein the actuator is mounted in a bushing which is
separable from the valve bonnet and/or body.
Subclass:
270
This subclass is indented under subclass 266. Devices in
which the internally threaded valve actuating portion is
restrained against rotation by co-action with guide structure
which is removable from the body structure.
SEE OR SEARCH THIS CLASS, SUBCLASS:
221 for removable guides associated with plural motion
valves.
Subclass:
271
This subclass is indented under subclass 270. Subject matter
wherein the actuator is resiliently mounted.
Subclass:
272
This subclass is indented under subclass 266. Devices in
which the valve is biased in one direction of movement.
Subclass:
273
This subclass is indented under subclass 264. Devices having
its thread element mounted in a recess or a ring for
cooperation with an external thread on the valve body.
Subclass:
274
This subclass is indented under subclass 264. Devices in
which the screw elements are completely enclosed within the
valve body.
Subclass:
275
This subclass is indented under subclass 274. Devices which
are biased to open or closed position.
Subclass:
276
This subclass is indented under subclass 275. Subject matter
wherein the biasing means is a spring.
Subclass:
277
This subclass is indented under subclass 264. Devices
wherein the valve is biased to open or closed position.
Subclass:
278
This subclass is indented under subclass 277. Devices in
which there is biasing means comprising a spring.
Subclass:
279
This subclass is indented under subclass 213. Subject matter
wherein the motion between the operator and valve is
transmitted through a system of rods or bars jointed together
and more or less constrained to transmit motion in a
particular manner by having a rod or rods fixed.
SEE OR SEARCH CLASS:
137, Fluid Handling, subclass 445 for float arm operated
valves having toggles or plural levers included in the
actuating means.
Subclass:
280
This subclass is indented under subclass 279. Apparatus
including toggle mechanism.
Subclass:
281
This subclass is indented under the class definition.
Subject matter wherein the valve is so related to the fluid
controlled that the pressure bias imparted by the line
pressure is balanced by opposing surfaces related to the
valve, so that the effect of the line pressure tending to
open or close the valve is cancelled out at least in part and
a lesser external force is necessary to actuate the valve.
SEE OR SEARCH THIS CLASS, SUBCLASS:
305 for butterfly valves.
SEE OR SEARCH CLASS:
137, Fluid Handling, subclass 196 for systems having a fluid
separating trap or vent using a level responsive pressure
balanced liquid outlet valve, subclasses 219-222 for
Larner-Johnson type valves that may include an inherent
balance, subclass 289 for a hydrant having a balanced valve,
subclass 450 for a liquid level responsive or maintaining
system using a float arm operated balanced valve, subclasses
494-510 for line condition responsive valves having a
separate connected reactor surface, subclass 601.02 for
systems dividing into parallel flow lines then recombining
including balanced valves having a common operator therefor,
subclasses 625.28-625.39 for valves balanced by dividing the
flow into branches which co-act with opposing surfaces,
subclasses 628-630.22, especially subclasses 630.19-630.22
for balanced spool type valves having heads with relative
movement with respect to each other or subclasses 629-630.15
for valves balanced by admitting fluid to a low pressure side
before an opening force is applied to the valve, and see the
references thereunder.
Subclass:
282
This subclass is indented under subclass 281. Valves wherein
the valve has a linear motion to and from flow obstructing
position.
Subclass:
283
This subclass is indented under subclass 281. Valves in
which the valve unit rotates.
Subclass:
284
This subclass is indented under the class definition.
Subject matter wherein means is provided with which the valve
or valve actuator comes into contact to arrest its motion,
the means being in the nature of an abutment or stop.
(1) Note. The mounting and actuation means of the valve
must be such that the motion controlled could be continued at
least to some extent in the absence of the stop.
SEE OR SEARCH THIS CLASS, SUBCLASS:
42 for adjustable opening limit means for a valve having a
choked pressure type servo-motor actuator.
60 for adjustable stops for fluid pressure actuated valves.
89 for means for blocking or holding the actuator at some
desired point or points, this means preventing motion in
either direction, and see the search notes thereto.
129.12 for limit control means for electrically actuated
valves.
Subclass:
285
This subclass is indented under subclass 284. Devices in
which the position of the stop may be varied.
Subclass:
286
This subclass is indented under subclass 284. Devices
associated with a rotary valve.
Subclass:
287
This subclass is indented under subclass 286. Devices in
which one of the stop elements is on the head or is an
integral part thereof.
Subclass:
288
This subclass is indented under subclass 286. Devices in
which one of the stop elements is on the actuator or is an
integral part thereof.
Subclass:
289
This subclass is indented under the class definition.
Subject matter wherein the valve is provided with means so
that it may be actuated from any of a plurality of positions,
the plural possibilities existing at the same time.
(1) Note. An example of such an arrangement is one wherein
a valve under the floor of a railroad car is arranged with a
long actuator so that it may be actuated from either side of
the car.
(2) Note. See the class definition of Class 137, section 4,
for search notes on plural actuators in this class.
SEE OR SEARCH THIS CLASS, SUBCLASS:
66 for trip actuated valves.
235 for levers with swiveled mountings which permit
actuation from plural positions.
290 for devices in which the actuator mounting may be
shifted with reference to the valve so that it is accessible
from different positions to perform the same operation, only
one position being available at any given adjustment.
293 wherein an extension is attached to the valve handle,
and wherein the valve may be actuated by the handle, as well
as by the extension.
SEE OR SEARCH CLASS:
137, Fluid Handling, 65 for biased trip controlled valves,
in which the trip actuator and the manual or other reset
means are actuated from different positions.
Subclass:
290
This subclass is indented under the class definition.
Subject matter wherein the valve or its actuator is provided
with means such that either may have a plurality of neutral
positions and such plural neutral positions are subject to
selection.
(1) Note. The reason for such arrangements usually is so
that the valve or its actuator may be mounted in different
positions, as required by the location or the convenience of
the operator.
SEE OR SEARCH THIS CLASS, SUBCLASS:
289 for plural actuators or actuators accessible from plural
positions, and see the notes thereto.
SEE OR SEARCH CLASS:
137, Fluid Handling, 269 for convertible devices involving
choice between positions but requiring disassembly for making
the change.
Subclass:
291
This subclass is indented under the class definition.
Subject matter wherein the valve is provided with actuating
means which is normally detachable or disengageable from the
valve.
SEE OR SEARCH THIS CLASS, SUBCLASS:
128 for detachable valve actuating means having additional
fluid sealing means which is brought into position to prevent
leakage upon detachment of the actuator.
293 for valve actuators comprising a handle and an extension
therefor, the valve being actable by either the handle or the
extension.
SEE OR SEARCH CLASS:
137, Fluid Handling, 320 for devices for opening a valve in
a container under pressure, the device comprising a separable
fluid conduit or tap and valve actuating means carried
thereby, subclasses 365+ for valve wells with means to center
the casing on the valve, this being done to facilitate
connection of a removable actuator, and subclass 382.5 for
detachable actuators having a key-like connection through a
shielding casing with a valve or valve stem.
Subclass:
292
This subclass is indented under subclass 291. Devices
wherein an actuator may be reciprocated along its axis to
engage or disengage with a rotatable valve. The actuator is
normally biased out of engagement with the valve whereby
rotation of the actuator will not rotate the valve.
Subclass:
293
This subclass is indented under the class definition.
Subject matter wherein an additional actuating means is
attached to the usual valve operating means whereby the valve
may be actuated from a remote point, or wherein means are
provided in connection with the usual valve operating means
to adapt it for the attachment of an extension.
SEE OR SEARCH THIS CLASS, SUBCLASS:
41 and 57, for remote control of fluid pressure operated
valves, and see the search notes to these subclasses.
229 for valve actuating means including two or more valve
operators having dissimilar mechanical movements.
291 for valves having detachable actuators, the part
associated with the valve not being actuable manually when
the separable part is removed, and see the search notes
thereto.
294 for flexible actuators for valves.
SEE OR SEARCH CLASS:
137, Fluid Handling, 272 for hydrants, in which the
below-ground valve requires an extended actuating means and
subclasses 343+ and principally subclasses 363+ for valves
associated with static constructional installation which
frequently involve extension operators.
Subclass:
294
This subclass is indented under the class definition.
Subject matter wherein the valve actuator is made of a
material or the parts thereof are connected in such a manner
as to permit ready flexing, bending or bowing.
(1) Note. Examples of flexible actuators are Bowden wires,
chains, ropes, etc.
SEE OR SEARCH THIS CLASS, SUBCLASS:
293 for other extension means for valve actuators.
SEE OR SEARCH CLASS:
74, Machine Element or Mechanism, 500.5 for flexible control
means, per se.
222, Dispensing, subclass 45 for flexibly connected
indicator and dispenser element.
Subclass:
295
This subclass is indented under the class definition.
Subject matter wherein the actuator for the valve is a pedal
actuator.
(1) Note. In order that the actuator be considered a pedal
actuator, some significant feature which makes the actuator
peculiarly designed to be operated by the foot or leg should
be set forth.
SEE OR SEARCH CLASS:
4, Baths, Closets, Sinks, and Spittoons, subclass 280 and
308 for pedal operated water closet and spittoon valves.
74, Machine Element or Mechanism, 512 for foot operated
control lever and linkage systems and subclasses 560+ for
pedals, per se.
137, Fluid Handling, subclass 354 for fluid handling devices
having a part mounted on the floor of a motor vehicle.
222, Dispensing, subclass 179 for dispensers with pedal
control of the discharge means.
Subclass:
296
This subclass is indented under the class definition.
Subject matter wherein the actuator has more than one
character or direction of motion, as rotating and
reciprocating, horizontal and vertical, which motions are
performed in sequence in the same valve actuating operation.
SEE OR SEARCH THIS CLASS, SUBCLASS:
213 for valves with mechanical movement actuators,
especially subclasses 215+ for plural motions of a valve
having a mechanical movement actuator, e.g., screw actuated
valves.
SEE OR SEARCH CLASS:
137, Fluid Handling, subclass 315.36 for a particular
mechanical actuator providing plural motions of a valve flow
control member with repair, tapping, assembly, or disassembly
means, or subclasses 636-636.4 for plural valves actuated by
different motions of the same actuator.
Subclass:
297
This subclass is indented under the class definition.
Devices with frictional means to resist movement of the
actuator.
SEE OR SEARCH THIS CLASS, SUBCLASS:
89 for means for blocking or disabling an actuator.
Subclass:
298
This subclass is indented under the class definition.
Devices in which the valve swings around the means by which
it is mounted on the valve seat or casing.
SEE OR SEARCH THIS CLASS, SUBCLASS:
177 for pivoted valves with means to increase head and seat
contact pressure.
228 for pivoted valves with reciprocating actuators.
SEE OR SEARCH CLASS:
137, Fluid Handling, subclass 448 for float arm actuated
pivoted valves, subclasses 520 and 521 for biased open,
direct response valves, subclasses 527+ for other direct
response pivoted valves and subclasses 625.44+ for multiway
pivoted valves.
Subclass:
299
This subclass is indented under subclass 298. Devices in
which the valve is mounted externally of the valve body and
controls flow through the inlet or outlet.
SEE OR SEARCH CLASS:
137, Fluid Handling, subclass 614.01 for separable, valved,
flow path sections wherein the closing-members seat against
the same faces as those which abut when the sections are
joined, the closing-members usually being in the nature of
pivoted, terminal valves.
Subclass:
300
This subclass is indented under subclass 299. Devices
wherein the valve moves across the end of the inlet or
outlet.
SEE OR SEARCH THIS CLASS, SUBCLASS:
349 for valves in which the actuator is the inlet or outlet
and the flow controller is a terminal gate.
SEE OR SEARCH CLASS:
137, Fluid Handling, subclass 15.22 for a process of
assembling, disassembling, or repairing a ball valve or
rotary valve.
Subclass:
301
This subclass is indented under subclass 298. Devices
wherein the valve moves transversely of the flow passage.
SEE OR SEARCH THIS CLASS, SUBCLASS:
212 for iris diaphragm type valves.
SEE OR SEARCH CLASS:
137, Fluid Handling, subclass 15.22 for a process of
assembling, disassembling, or repairing a ball valve or
rotary valve, or subclass 625.45 for a multi way pivoted gate
valve.
Subclass:
302
This subclass is indented under subclass 301. Devices
wherein the valve head has two seating faces which seat
simultaneously on oppositely disposed seats in a single flow
line.
Subclass:
303
This subclass is indented under subclass 298. Devices in
which the valve has one position which it will maintain under
the influence of a constant force which comprises a biasing
means, and force must be applied to the valve in order to
have it take a different position.
SEE OR SEARCH CLASS:
137, Fluid Handling, subclass 520, 521 and 527.8 for direct
response pivoted valves.
Subclass:
304
This subclass is indented under the class definition.
Subject matter comprising a valve head which only rotates
about its axis and has a flow passage within it.
SEE OR SEARCH THIS CLASS, SUBCLASS:
149.2 for rotary valves wherein the rotation is the result
of a linear motion of one flow path section with respect to
another in the act of joining the sections.
160 180+, 188, and 192, for rotary valves having means to
increase the head and seat contact pressure.
207 through 209, for rotary valves with graduated ports.
283 for balanced rotary valves.
286 for rotary valves with limit stops.
292 for rotary valves with detachable actuators.
345 for rotary valves actuated by the valve casing.
SEE OR SEARCH CLASS:
137, Fluid Handling, subclass 56 for a speed responsive
valve control centrifugal mass, exclusive of liquid, rotating
valve, and rotating governor, subclass 250 for a horizontally
moving rotary valve having a liquid seal, subclass 311 for a
rotary reversing valve regenerative furnace type, subclass
447 for a liquid level response or maintaining system using a
float arm actuated rotary valve, subclasses 601.16-601,17 for
systems dividing into parallel flow lines then recombining
having a rotary valve, subclass 616.7 for systems where an
articulated or swinging flow conduit actuates a rotary valve,
subclasses 625.15-625.16 for a rotary multi way valve unit
having sequentially progressive opening and closing valves of
plural ports with subsequent closing of the first port,
subclasses 625.21-625.24 for a rotary multi way valve unit
having supply and exhaust, subclasses 625.34-625.36 for
systems having a reciprocating spool multi way valve unit
where flow divides into parallel flow lines then recombines,
subclass 625.41 for a rotary multi way valve unit with a
multiple inlet and a single outlet, subclasses 625.46-625.47
for a rotary multi way valve unit, or subclass 630.21 for
lost motion sequentially opening or closing rotary concentric
valves.
Subclass:
305
This subclass is indented under subclass 304. Devices
wherein the pivot is centrally located in the valve member,
providing oppositely directed radial wings.
SEE OR SEARCH THIS CLASS, SUBCLASS:
173 for valves of this type having fluid pressure means to
press the seat to the valve.
SEE OR SEARCH CLASS:
137, Fluid Handling, subclass 15.25 for a process of
assembling, disassembling, or repairing a butterfly valve.
Subclass:
306
This subclass is indented under subclass 305. Devices
providing a sealing material or element carried by the valve
head, by the valve seat or by both.
SEE OR SEARCH CLASS:
137, Fluid Handling, subclass 315.23 for means to assemble
or disassemble a butterfly valve having a head or seat
packing.
277, Seal for a Joint or Juncture, for a generic sealing
means or process, 628 for a static contact seal for other
than an internal combustion engine, or a pipe, conduit, or
cable.
Subclass:
307
This subclass is indented under subclass 306. Devices in
which the packing is adjustable to facilitate its original
installation or to provide take-up for wear.
Subclass:
308
This subclass is indented under subclass 305. Devices
providing the means for attaching the valve stem, or pivot,
to the valve head.
SEE OR SEARCH CLASS:
137, Fluid Handling, subclass 315.24 for means to assemble
or disassemble a butterfly valve having a connection between
a valve head and stem.
Subclass:
309
This subclass is indented under subclass 304. Subject matter
wherein the valve rotates about its own axis, has a flow
passage through it and at least the inlet or outlet of that
passage is transverse to the axis of rotation and is formed
in a seat contacting portion.
SEE OR SEARCH CLASS:
137, Fluid Handling, subclass 15.24 for a process of
assembling, disassembling, or repairing a plug valve, or
subclasses 315.25-315.26 for a plug valve with assembly or
disassembly means.
Subclass:
310
This subclass is indented under subclass 309. Devices in
which there is a passage which extends both radially and
longitudinally through the valve head.
SEE OR SEARCH CLASS:
137, Fluid Handling, subclass 625.24 for stop and waste
valve units having axially and radially extending passages in
the plug.
Subclass:
311
This subclass is indented under subclass 310. Devices in
which the valve head has at least two radially extending
passages, one an inlet and one an outlet, connected by a
longitudinally extending passage.
Subclass:
312
This subclass is indented under subclass 309. Subject matter
wherein the means for holding the head in the body is on the
same side of the head as the valve actuator.
Subclass:
313
This subclass is indented under subclass 304. Devices in
which means are provided to bias the valve to open or closed
position.
Subclass:
314
Seat or interface seat:
This subclass is indented under subclass 304. Subject matter
comprising a valving element which cooperates with a seat or
a seal interposed between the seat and the valving element.
SEE OR SEARCH CLASS:
137, Fluid Handling, subclasses 315.19-315.22 for
assembling or disassembling a rotary ball valve having a
particular valve seat or interface seal therefor.
277, Seal for a Joint or Juncture, for a generic sealing
means or process, 628 for a static contact seal for other
than an internal combustion engine, or a pipe, conduit, or
cable.
Subclass:
315.01
Ball valve:
This subclass is indented under subclass 304. Rotary valve
comprising a housing having a flow passage therethrough and a
valve seat; with a spherical head that contacts the seat and
can be rotated about an axis passing generally through its
geometrical center by an actuating means.
(1) Note. Patents to be classified in the subclasses "Ball
valve'' to "With removable trunnion cover'' of this Class 251
subclasses 315.01-315.09 and "Ball construction'' of this
Class 251 subclass 315.16 are properly classified when placed
in the appropriate subclasses "Housing construction'' of this
Class 251 subclasses 315.1-315.15. For example, claims to a
ceramic housing assembled around the valve head would be
classified in this Class 251 subclass 315.04 for the original
reference and cross-references of this Class 251 subclass
315.13.
SEE OR SEARCH CLASS:
137, Fluid Handling, subclass 15.22 for a process of
assembling, disassembling, or repairing a ball valve or
rotary ball valve.
Subclass:
315.02
Having a particular hardness (i.e., durometric property):
This subclass is indented under subclass 315.01. Subject
matter which relates to the durability of the ball valve.
Subclass:
315.03
Of specific material:
This subclass is indented under subclass 315.01. Ball valve
fabricated from a particular composition.
(1) Note. Mere recitation of a material without particular
significance attributed to the valve would not be classified
in this subclass.
Subclass:
315.04
Ceramic (e.g., glass or fired clay):
This subclass is indented under subclass 315.03. Material
which is hard, brittle, heat-and corrosion resistant, and
shaped by firing a nonmetallic mineral at high temperatures.
Subclass:
315.05
Nonmetallic:
This subclass is indented under subclass 315.03. Material
which is not made of an element conductive to heat and
electricity (e.g., synthetic resin).
Subclass:
315.06
Having a swinging actuator:
This subclass is indented under subclass 315.01. Ball valve
in which the spherical head is rotated about the axis by an
actuating means attached thereto, with the actuating means
extending from the spherical head generally perpendicular to
the axis of rotation.
SEE OR SEARCH THIS CLASS, SUBCLASS:
298 for a pivoted valve that swings around the means by
which it is mounted on the valve seat or casing.
Subclass:
315.07
Eccentric seating:
This subclass is indented under subclass 315.01. Ball valve
whose spherical head or seat is specifically off center from
the axis about which it rotates.
Subclass:
315.08
Including trunnion opposite axially extending actuating
means:
This subclass is indented under subclass 315.01. Ball valve
wherein the spherical head has a driving stem along the axis
about which it rotates and the driving stem is diametrically
opposed to the actuating means so as to interfit with a
journal means in the housing.
Subclass:
315.09
With removable trunnion cover:
This subclass is indented under subclass 315.08. Device
having a detachable plate to protect the trunnion or to
permit access (i.e., retainer plate).
Subclass:
315.1
Housing construction:
This subclass is indented under subclass 315.01. Ball valve
relating to the assembly of a body structure which completely
surrounds the spherical head and defines the flow passage
therethrough.
Subclass:
315.11
Head removable perpendicular to flow passage:
This subclass is indented under subclass 315.1. Housing
which has a component that can be disassembled to allow the
withdrawal of the spherical head laterally with respect to
the flow passage of the housing.
Subclass:
315.12
At the actuator side (i.e., top entry):
This subclass is indented under subclass 315.11. Housing
which has a side component that is removable adjacent the
actuating means.
SEE OR SEARCH CLASS:
137, Fluid Handling, subclass 315.21 for assembling or
disassembling a rotary ball valve having a particular valve
seat or interface seal therefor and where the ball is
removable from an actuator side (i.e., top entry).
Subclass:
315.13
Assembled around the head:
This subclass is indented under subclass 315.1. Housing
which is assembled by engaging an inlet component and outlet
component to create a unitary housing adjacent and
surrounding the spherical head.
Subclass:
315.14
Head removable along one side of flow passage:
This subclass is indented under subclass 315.1. Housing
which has a component that is disassembled parallel to the
flow passage and adjacent the spherical head to allow the
withdrawal of the spherical head.
Subclass:
315.15
Having inseparable head:
This subclass is indented under subclass 315.1. Housing
wherein the body structure is unitary so that the spherical
head cannot be removed without damaging the valve structure
(i.e., housing permanently formed about the head by bending,
welding, molding, etc.).
Subclass:
315.16
Ball construction:
This subclass is indented under subclass 315.01. Ball valve
which relates to the structural design of the spherical valve
head.
Subclass:
316
This subclass is indented under subclass 314. Subject matter
comprising seat or sealing elements so constructed or
arranged in the casing as to be readily replaced by strictly
manual operations.
Subclass:
317
Deformable material:
This subclass is indented under subclass 314. Seat or
interface seal made from material that is resilient and thus
can be distorted upon sealing engagement (e.g., plastic,
rubber, foam, etc.).
Subclass:
317.01
Carried by head:
This subclass is indented under subclass 315.18. Seat or
interface seal particularly adapted to be attached to the
spherical head of the ball valve.
Subclass:
318
This subclass is indented under the class definition.
Subject matter wherein the valve has a linear motion to and
from flow obstructing position.
SEE OR SEARCH THIS CLASS, SUBCLASS:
62 for piston type fluid actuated or retarded valve.
129.16 the armature is the valve closure.
215 and 264+, for screw actuated valves.
SEE OR SEARCH CLASS:
137, Fluid Handling, subclass 288 for a hydrant having a
reciprocating riser actuated piston type valve, subclass 307
for a hydrant having protection against freezing using stop
and waste valves that are fixed relative to each other and
reciprocate together, subclasses 315.27-315.32 for a
reciprocating valve with assembling or disassembling means,
subclass 433 for a liquid level responsive or maintaining
system having a rectilinearly traveling float that is rigid,
coaxial, and controls a valve, subclasses 442-444 for a
liquid level responsive or maintaining system having a float
arm operated valve mounted on and reciprocating coaxial to an
inlet pipe, subclasses 528-543.23 for reciprocating check and
safety valves, or subclasses 625.25-625.69 for reciprocating
supply and exhaust multi way valve unit.
222, Dispensing, 559 for reciprocating dispenser valves.
277, Seal for a Joint or Juncture, for a generic sealing
means or process, 628 for a static contact seal for other
than an internal combustion engine, or a pipe, conduit, or
cable.
Subclass:
319
This subclass is indented under subclass 318. Valves
actuated by a reciprocating means (e.g., push and pull button
or rod).
Subclass:
320
This subclass is indented under subclass 319. Valves biased
or urged to one position.
Subclass:
321
This subclass is indented under subclass 320. Valves having
a spring biased valve.
Subclass:
322
This subclass is indented under subclass 321. Valves wherein
a stop (e.g., a collar) for the spring is provided on the
valve stem.
Subclass:
323
This subclass is indented under subclass 321. Valves wherein
the spring abuts a guide for the valve stem.
Subclass:
324
This subclass is indented under subclass 318. Subject matter
wherein the valve head is a cylinder fitted for slidable
reciprocation within or telescopically on a cylindrical seat,
which seat provides a guiding and sealing surface for the
head substantially throughout the girth thereof so that the
head is guided and sealed in all of its positions, there
being a port or ports in the cylindrical wall of either the
head or seat which will be opened or closed upon
reciprocation of the piston.
SEE OR SEARCH THIS CLASS, SUBCLASS:
157 especially subclasses 190+ for piston valves with means
to increase the head and seat contact pressure to reduce the
wear upon operation.
SEE OR SEARCH CLASS:
137, Fluid Handling, subclass 288 for piston type valves of
the hydrant type, subclasses 538+ for line condition change
responsive piston valves and subclasses 625.37+ for piston
valves where the flow is divided and recombined.
Subclass:
325
This subclass is indented under subclass 324. Subject matter
wherein the piston provides an internal flow passage for the
line fluid.
SEE OR SEARCH CLASS:
137, Fluid Handling, 625.38 for pistons providing an
internal flow passage and including the feature of dividing
and recombining the flow.
Subclass:
326
This subclass is indented under subclass 318. Devices
wherein the valve moves transversely of the flow passage.
SEE OR SEARCH THIS CLASS, SUBCLASS:
157 especially subclasses 167+, 175 and 193+ for gate valves
having means to increase the contact pressure between the
head and seat.
300 and 301+, for pivoted gates.
SEE OR SEARCH CLASS:
137, Fluid Handling, subclass 15.22 for a process of
assembling, disassembling, or repairing a ball valve or
rotary ball valve, or subclass 625.45 for a multi way pivoted
gate valve or subclass 630.12 for sequentially opening gate
valves.
Subclass:
327
This subclass is indented under subclass 326. Devices
wherein the valve head has two seating faces.
SEE OR SEARCH THIS CLASS, SUBCLASS:
302 for pivoted bifaced valves.
Subclass:
328
This subclass is indented under subclass 326. Devices
comprising the substantially stationary valve element with
which the head cooperates to produce the valving action.
SEE OR SEARCH THIS CLASS, SUBCLASS:
359 for valve seats of general utility.
Subclass:
329
This subclass is indented under subclass 326. Devices
relating to the body structure.
Subclass:
330
This subclass is indented under subclass 318. Devices in
which leakage about the valve operating stem is prevented by
the engagement of a valve head-like structure carried either
by the stem or by the valve head which engages a seat-like
structure carried by the valve body when the main valve is
opened.
SEE OR SEARCH THIS CLASS, SUBCLASS:
214 for valves having mechanical movement actuators
particularly packed.
SEE OR SEARCH CLASS:
137, Fluid Handling, subclass 315.28 for a reciprocating
valve having a particularly packed or sealed mechanical
movement actuator with assembling or disassembling means.
Subclass:
331
This subclass is indented under subclass 318. Devices
wherein the reciprocating member that opens and closes or
controls flow of fluid through the valve consists of a flat
or cup shaped member of relatively thin deformable material
secured at its periphery to the valve body.
SEE OR SEARCH THIS CLASS, SUBCLASS:
61.2 for an expansible chamber valve actuator having a
flexible wall working member which functions as a valve
element to control the flow of fluid through the valve.
SEE OR SEARCH CLASS:
137, Fluid Handling, 843 for resilient material, direct
response valves.
Subclass:
332
This subclass is indented under subclass 318. Devices in
which either the reciprocating head element or the
cooperating seat is provided with an additional sealing
gasket so that when the valve is closed, a nonresilient seal
(generally metal to metal) is formed as well as a seal
between the gasket and the nonresilient structure with which
it engages.
SEE OR SEARCH CLASS:
137, Fluid Handling, subclass 516.29 for this structure in
direct response valves.
Subclass:
333
This subclass is indented under subclass 318. Devices in
which both the head and seat surfaces which constitute the
valve interface are so constructed that they mutually
cooperate to produce the valving action.
(1) Note. Patents have been placed here in which the
peculiar construction of the head requires a particular
configuration of the cooperating seat, and vice versa, (i.e.,
the head would not successfully operate with a conventional
seat, e.g., a conical seat, a planar seat, etc.) or in which
the mode of operation of the valve depends upon a
specifically contoured head or seat to produce some
unexpected result.
Subclass:
334
This subclass is indented under subclass 333. Devices in
which one of the valve elements is metallic and is deformed
against its cooperating element within its elastic limit to
provide a seal.
Subclass:
335.1
HERMETIC FLEXIBLE WALL SEAL FOR ACTUATOR:
This subclass is indented under the class definition.
Subject matter wherein sealing means comprising a diaphragm
or flexible sheet material member is interposed between the
actuator and the valve to close the flow passage, the sealing
means yielding with the movement of the actuator.
SEE OR SEARCH THIS CLASS, SUBCLASS:
128 for valve devices having a detachable actuator and means
for preventing leakage when the actuator is detached.
SEE OR SEARCH CLASS:
74, Machine Element or Mechanism, 18 for flexible seals
pierced by a rod, which seal is fixed to its support and to
the rod.
137, Fluid Handling, subclass 536 for line condition
responsive valves having spring means for biasing the valve
to closed position and means for protecting the spring from
the pressure fluid.
277, Seal for a Joint or Juncture, for a generic sealing
means or process, 634 for a static contact seal for other
than an internal combustion engine, or a pipe, conduit, or
cable that is a flexible sleeve, boot, or diaphragm.
Subclass:
335.2
Diaphragm:
This subclass is indented under subclass 335.1. Subject
matter wherein the sealing means comprises the diaphragm.
Subclass:
335.3
Bellows:
This subclass is indented under subclass 335.1. Subject
matter wherein the sealing means comprises and annular
pleated expansible and contractible member.
Subclass:
336
This subclass is indented under the class definition.
Subject matter wherein the valve has one position which it
will maintain under the influence of a spring or weight which
comprises a biasing means, and force must be applied to the
valve in order to have it take a different position.
SEE OR SEARCH THIS CLASS, SUBCLASS:
66 for biased trip valves, and see the search notes
thereto.
75 for valves having means to produce a snap action, which
usually include biasing means.
SEE OR SEARCH CLASS:
137, Fluid Handling, subclass 315.33 for a check valve
(e.g., non-return valve, etc.) with assembling or
disassembling means, subclasses 455-543.23 for a line
condition responsive valve, especially subclasses 511-543.23
for a direct response valve (i.e., check valve type),
subclass 524 for a direct response valve (i.e., check valve
type) with bias adjustment indicator, or subclass 530 for a
direct response reciprocating valves (i.e., check valve type)
having cam means for adjusting and fixing bias.
222, Dispensing, 511 for resilient biasing means for
dispenser outlet elements.
Subclass:
337
This subclass is indented under subclass 336. Subject matter
including valve springs and means for mounting the spring on
the valve.
SEE OR SEARCH CLASS:
123, Internal-Combustion Engines, 90.65, for poppet valve
operating mechanism which includes valve springs and the
seats and retainers for the springs.
267, Spring Devices, subclass 1 for spring devices of
general utility.
411, Expanded, Threaded, Driven, Headed, Tool-Deformed, or
Locked-Threaded Fastener, 427 for nuts; and subclasses 531+
for washers of general utility.
Subclass:
338
This subclass is indented under subclass 336. Subject matter
wherein the biasing means is a member of sufficient mass to
maintain the valve in the desired position by gravity
response.
SEE OR SEARCH THIS CLASS, SUBCLASS:
72 for weight biased trip actuated valve.
76 for impact type actuators for valves.
SEE OR SEARCH CLASS:
137, Fluid Handling, 38 for control of change of position or
inertia of the system, especially subclasses 45+ for control
by pendulum or swinging member, subclasses 403+ for liquid
level responsive devices responding to weight of accumulated
fluid, and see the search notes to subclasses 403 and 408,
subclasses 419 and 421 for weight actuators in quick acting
float control valves and subclasses 519+ and 532+ for weight
biased valves directly responding to line condition change.
Subclass:
339
This subclass is indented under the class definition.
Subject matter wherein the valve actuator extends through a
fluid inlet or outlet to reach and operate the valve.
(1) Note. The actuator may emerge from the outlet at the
point where the material is freed from confinement, or it may
emerge from the main container within the flow line and
project through the wall thereof at a point exterior to the
main container.
SEE OR SEARCH CLASS:
222, Dispensing, subclass 322 and 501 for actuators for
discharge assistants and movable outlet elements
respectively, which actuators project through the discharge
guide.
Subclass:
340
This subclass is indented under the class definition.
Subject matter wherein the valve actuator comprises an
annular member which is mounted around and guided by a pipe
which forms a flow passage leading to or from the valve.
SEE OR SEARCH THIS CLASS, SUBCLASS:
4 for tube compressors which include means surrounding the
pipe to control the flow by deformation of the pipe.
SEE OR SEARCH CLASS:
222, Dispensing, subclass 507 for an annular, outlet
surrounding actuator for a dispenser outlet element.
Subclass:
341
This subclass is indented under the class definition.
Subject matter wherein the valve actuator comprises a part of
the flow confining means which is exposed to the fluid at a
region ahead of the cut-off point, or an extension of such
part.
SEE OR SEARCH THIS CLASS, SUBCLASS:
149 for valves operated by coupling or conduit motion, and
see the search notes thereto.
SEE OR SEARCH CLASS:
166, Wells, subclass 334.1 and the subclasses there noted,
for well devices comprising valves operated by motion of the
conduit supporting the valve, and see subclass 316 for the
line between Classes 166 and 251.
Subclass:
342
This subclass is indented under subclass 341. Devices in
which the wall of the valve casing is jointed or flexible to
permit a bending movement which actuates the valve.
Subclass:
343
This subclass is indented under subclass 341. Devices in
which a movable sleeve constitutes the valve head.
Subclass:
344
This subclass is indented under subclass 343. Devices in
which a flow passage in the sleeve connects spaced ports in
the valve body, and movement of the sleeve controls
communication between the ports.
Subclass:
345
This subclass is indented under subclass 343. Devices in
which the motion of the sleeve is rotary.
Subclass:
346
This subclass is indented under subclass 341. Devices in
which movement of the valve casing produces plural motions of
the valve which may be simultaneous or sequential.
SEE OR SEARCH CLASS:
137, Fluid Handling, subclass 315.36 for a particular
mechanical actuator providing plural motions of a valve flow
control member with repair, tapping, assembly, or disassembly
means.
Subclass:
347
This subclass is indented under subclass 341. Devices in
which movement of the valve casing imparts to the valve a
reciprocating motion.
SEE OR SEARCH THIS CLASS, SUBCLASS:
346 for similar valves which have plural motions one of
which may be reciprocation.
Subclass:
348
This subclass is indented under subclass 341. Devices in
which the valve has one position which it will maintain under
the influence of a spring or weight which comprises a biasing
means, and movement of the casing causes the valve to assume
a different position.
Subclass:
349
This subclass is indented under the class definition.
Subject matter wherein the valve actuator comprises a flow
confining member which comprises the inlet or outlet for
material passing through the valve.
SEE OR SEARCH THIS CLASS, SUBCLASS:
153 for valves combined with particular inlet and outlet
means, and see the search notes thereto.
SEE OR SEARCH CLASS:
137, Fluid Handling, 286 for hydrants in which the outlet
riser is the actuator for the valve, and subclass 616+ for
distribution systems wherein the valve actuator is an
articulated or swinging flow conduit or nozzle, and see the
search notes thereto.
Subclass:
350
This subclass is indented under subclass 349. Devices in
which the inlet or outlet has a removable tip.
Subclass:
351
This subclass is indented under subclass 349. Devices in
which the movement of the inlet or outlet produces plural
motions of the valve or valve components which motions may be
concurrent or consecutive.
SEE OR SEARCH CLASS:
137, Fluid Handling, subclass 315.36 for a particular
mechanical actuator providing plural motions of a valve flow
control member with repair, tapping, assembly, or disassembly
means.
Subclass:
352
This subclass is indented under subclass 349. Devices in
which the movement of the inlet or outlet imparts a rotary
motion to the valve or valve components.
Subclass:
353
This subclass is indented under subclass 349. Devices in
which the outlet is a nozzle or spout which is capable of
actuating the valve by rectilinear motion only.
Subclass:
354
This subclass is indented under subclass 349. Devices in
which there is an impositive connection between the actuator
and the valve.
Subclass:
355
This subclass is indented under the class definition.
Subject matter wherein means are provided for lubricating the
actuator or valve parts other than those exposed to the fluid
flow.
SEE OR SEARCH CLASS:
123, Internal-Combustion Engines, 90.33, for poppet valve
operating mechanism which provides for lubrication.
137, Fluid Handling, 237 for systems in which the
lubrication is put into the fluid stream, especially
subclasses 246+ for liquid sealing and/or lubrication at the
valve interface, subclass 298 for actuator lubricating means
in hydrants and subclasses 330+ for nonvalving motions of
valves, sometimes intended to prevent sticking, and see the
search notes thereto.
184, Lubrication, appropriate subclasses, for installed
lubricating means generally.
Subclass:
356
This subclass is indented under the class definition.
Subject matter comprising means for variably restricting or
entirely cutting off the flow of fluid through a passage.
(1) Note. The subject matter of this subclass relates to
valves, per se, which were included in this class by analogy
to the various special types specifically provided for. See
the search notes below for a listing of such special types.
SEE OR SEARCH CLASS:
137, Fluid Handling, 67 for fusible, soluble and other
destructible and deformable closures, subclasses 154+
especially subclasses 173+, 177+ and 197+ for discriminating
valves for gas and liquid, subclasses 219+ for Larner-Johnson
valves, subclasses 251+ for liquid valves, subclasses 309+
for reversing valves for regenerative furnaces, subclasses
386+, especially subclasses 409+ for float operated valves,
subclasses 455+ for line condition change responsive valves,
e.g., pop and other safety valves, check valves and safety
cut-offs.
Subclass:
357
This subclass is indented under subclass 356. Subject matter
in which the valve is provided with a readily removable or
replaceable sealing element.
Subclass:
358
This subclass is indented under subclass 356. Subject matter
comprising valves made of resilient material which are either
internally or externally stiffened or otherwise reinforced by
a diverse material.
Subclass:
359
This subclass is indented under subclass 356. Subject matter
comprising the normally stationary valving element with which
the head or movable element cooperates.
SEE OR SEARCH THIS CLASS, SUBCLASS:
328 for gate valve seats.
SEE OR SEARCH CLASS:
137, Fluid Handling, 513.3 for seats of direct response
valves with leak passages.
Subclass:
360
This subclass is indented under subclass 359. Subject matter
which are structurally modified to provide for ready removal
from the valve body or the partition therein.
SEE OR SEARCH CLASS:
137, Fluid Handling, subclass 234.5 and 454.2+ for removable
valve head and seats units, subclasses 329.51+ for removable
seats duplicated and reversible and subclass 533.15 for a
removable seat associated with direct response reciprocating
ball valve.
Subclass:
361
This subclass is indented under subclass 360. Devices in
which the valve seat is retained between separable sections
of a valve body or casing.
Subclass:
362
This subclass is indented under subclass 360. Subject matter
in which the retaining means comprises structure which biases
the seat against the partition member by either tensional or
compressional engagement with the valve body or casing at a
point remote from the partition.
Subclass:
363
This subclass is indented under subclass 360. Subject matter
in which a separate element disposed between the seat and the
seat-supporting body structure is provided to prevent leakage
between the seat and said supporting structure.
SEE OR SEARCH CLASS:
277, Seal for a Joint or Juncture, for a generic sealing
means or process, 628 for a static contact seal for other
than an internal combustion engine, or a pipe, conduit, or
cable.
Subclass:
364
This subclass is indented under subclass 359. Subject matter
provided with a sealing member of resilient material which
engages the head and constitutes the sole valving surface of
the seat.
Subclass:
365
This subclass is indented under subclass 359. Subject matter
in which the seat is retained in position by deformation of
the seat.
Subclass:
366
This subclass is indented under subclass 356. Devices
relating to the valve body or casing.
Subclass:
367
This subclass is indented under subclass 366. Devices
consisting of two or more separable parts and the means for
securing them together.
Subclass:
368
This subclass is indented under subclass 356. Devices
relating to the materials of which valve parts are made.
SEE OR SEARCH CLASS:
137, Fluid Handling, subclass 375 for coatings or linings of
particular materials.
Subclass:
369
This subclass is indented under the class definition.
Devices not herein-before provided.
SEE OR SEARCH CLASS:
131, Tobacco, subclass 206, 215.1+, 223 for valves in smoking
devices for tobacco users.
CROSS-REFERENCE ART COLLECTIONS
THE DOCUMENTS IN THE FOLLOWING COLLECTIONS CONTAIN ONLY
CROSS-REFERENCES WHICH HAVE BEEN PLACED WITHOUT REGARD TO
THEIR ORIGINAL CLASSIFICATION OR TO THEIR CLAIMED SUBJECT
MATTER AND THEREFORE ARE ONLY REPRESENTATIVE OF THE ART OR
SUBJECT MATTER. CONSEQUENTLY, A COMPLETE SEARCH FOR ART OR
SUBJECT MATTER PROVIDED FOR HERE WOULD REQUIRE A REVIEW OF
THE HIGHER PORTIONS OF THE CLASSIFICATION SCHEDULE.
Subclass:
900
VALVES WITH O-RINGS
This subclass is indented under the class definition. Art
collection drawn to valves provided with O-rings.
Subclass:
901
CURTAIN TYPE VALVES
This subclass is indented under the class definition. Art
collection drawn to curtain type valves.
Subclass:
902
SPRINGS EMPLOYED AS VALVES
This subclass is indented under the class definition. Art
collection drawn to springs used as valves.
Subclass:
903
NEEDLE VALVES
This subclass is indented under the class definition. Art
collection drawn to needle valves.
Subclass:
904
SNAP FIT PLUG VALVES
This subclass is indented under the class definition. Art
collection drawn to snap fit plug valves.
Subclass:
905
MOVABLE COIL ELECTRICAL ACTUATOR (E.G., VOICE COIL):
Valves with electrical actuators whose coil windings move
when energized.
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