U.S. PATENT AND TRADEMARK OFFICE
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U.S. Patent Classification System - Classification Definitions
as of June 30, 2000
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Class 418
ROTARY EXPANSIBLE CHAMBER DEVICES
Class Definition:
This class relates to devices which include a working chamber
the volume of which is progressively variable into which
fluid alternately enters and exhausts and which is formed by
a surface (or surfaces) of a moving solid member having
relative movement with another solid surface (or surfaces), a
portion of the working chamber boundary being substantially
fixed, and in which:
(1) The working member has rotary motion in a single
direction about a fixed or movable axis thereby to expand and
contract the volume of the working chamber, there being
relative rotation between the said working member and surface
at some time during the expansion and contraction of the
working chamber.
(2) The working member is circular and causes a change in the
volume of the working chamber as it is progressively tilted
in a single direction about a point on its axis to
progressively contact said other surface, the central axis of
the working member describing a cone whose apex is the point
about which the working member oscillates or wobbles.
(3) The working member causes a change in the volume of the
working chamber but does not have absolute rotation, the
working member being provided with means having an axis
offset from and parallel to the central axis of the working
member about which the central axis moves in an orbit whereby
the working member has planetary movement within the working
chamber.
LINES WITH OTHER CLASSES AND WITHIN THIS CLASS
COMBINATIONS WITH LOAD DEVICES
Inasmuch as a mechanical force output of a rotary expansible
chamber device within the definition of this class is to
operate or move a load the inclusion of the load in the claim
by name only or in general terms will not exclude a patent
from this class. An exception to this general rule exists
where the load on the expansible chamber device is a valve.
The combination of a rotary expansible chamber device and a
valve as the load moved thereby even if claimed by name only,
is excluded from this class. (See References to Other
Classes, below.)
This line also applies where the load is a tool: that is, a
named tool moved by a rotary expansible chamber device will
not exclude a patent from this class if no tool details are
recited. However, if a support for the work being acted upon
by the tool is claimed, classification in the appropriate
tool class results even though both the tool and the support
are claimed by name only. Also see the Search Class notes,
below for the line with regard to a nominally claimed tool
driven by a rotary expansible chamber device combined with
other features such as work cleansing or tool feeding.
No attempt has been made to review the classification of all
patents found in classes relating to loads adapted to be
moved by a rotary expansible chamber device. Thus, it is to
be noted that the original classification of all patents is
not consistent with the above statement as to nominally
claimed loads and this particularly applies as to classes not
recently reclassified. In those instances in which a body of
art is known to exist in a given class in which the load
adapted to be moved by the rotary expansible chamber device
is claimed only nominally, and especially where the
classification of that class provides for a fluid pressure
actuator for the device, currently issuing patents will not
be classified as original in this class (418) even though the
load is only nominally claimed.
The means which transmits power from the working member of
the rotary expansible chamber device to the load to be moved
(e.g., linkage, gearing, etc.), is not considered to be the
load to be moved by the expansible chamber device. Also see
the Search Class notes below for a further discussion of this
subject.
REFERENCES TO OTHER CLASSES
SEE OR SEARCH CLASS:
15, Brushing, Scrubbing, and General Cleaning, for pumps
claimed in combination with a work-contacting suction or
blast nozzle.
73, Measuring and Testing, subclasses 253+ for rotary
cylinder or piston type expansible chamber devices used in
volume or rate of flow meters. Class 73 includes rotary
expansible chamber meters combined with registering mechanism
and meters incapable of general use as an expansible chamber
device. A meter is considered to be incapable of such
general use if there is no disclosed means to take power
therefrom for external use such as to a registering
mechanism. Therefore Class 418 takes a rotary expansible
chamber device having means to take power therefrom such as
for an unclaimed registering mechanism.
74, Machine Element or Mechanism, appropriate subclasses for
machine elements and mechanisms, per se, and in combination
with a nominally claimed rotary expansible chamber device.
In general, gearing or linkage included as part of the power
means either to drive or be driven by a rotary expansible
chamber device is considered to be basic subject matter of
the rotary expansible chamber device and would not preclude
classification in Class 418.
96, Gas Separation: Apparatus, for the combination of a
rotary expansible chamber device and a specifically claimed
separator or filter not specifically disclosed for protecting
the rotary expansible chamber device. For a further
statement of the line between Classes 96 and 418, see Lines
With Other Classes and Within This Class, in the class
definition to Class 96 for the line between Classes 96 and
417, the line between Classes 96 and 418 being the same.
123, Internal-Combustion Engines, appropriate subclasses for
a rotary piston and cylinder combination claimed with
significant internal-combustion structure such as fuel
injection means, ignition means, fuel charge treatment means,
or compression means with transfer means to an expansion
means.
137, Fluid Handling, for the combination of a rotary
expansible chamber device and a valve as the load moved
thereby even if claimed by name only. (Lines With Other
Classes and Within This Class, Combinations With Load
Devices.)
173, Tool Driving or Impacting, appropriate subclasses for a
rotary expansible chamber device for operating an impact
delivering means or for operating a tool combined with work
cleaning or feed means.
210, Liquid Purification or Separation, appropriate
subclasses and especially subclass 416.1, for the combination
of a rotary expansible chamber device and a specifically
claimed filter not specifically disclosed for protecting the
rotary expansible chamber device whether or not the filter is
upstream or downstream of the device. For a further
statement of the line, see the search class note in the
definition to subclass 416.1 of Class 210 for the line
between Classes 210 and 417, the line between Classes 210 and
418 being the same.
222, Dispensing, appropriate subclasses, for the combination
of a pump and a significantly claimed supply container and
see section 9 of the class definition to Class 222 for an
elaboration of the line between Classes 222 and 418.
251, Valves and Valve Actuation, for the combination of a
rotary expansible chamber device and a valve as the load
moved thereby even if claimed by name only. (Lines With
Other Classes and Within This Class, Combinations With Load
Devices.)
277, Seal for a Joint or Juncture, for a generic sealing
means or process that may include a nominally claimed rotary
expansible chamber device. Class 277 takes a nominally
claimed rotary piston and cylinder combination, or a
nominally claimed rotary piston or cylinder, per se, where
the claim is otherwise directed to a packing or sealing means
between relatively movable surfaces of said cylinder and
rotary piston or on said cylinder or rotary piston. Class
418 takes such devices, where some details of the cylinder or
rotary piston is set forth in the claim. However, structure
of such device which is solely intended to cooperate with the
packing or sealing means is not considered a detail of the
device for Class 418, and is classified in Class 277. A
device including either a flexible cup or flange type sealing
member combined with a supporting body structure is
classified in Class 418 where such device is disclosed as a
rotary piston for either a pump or a motor.
417, Pumps, appropriate subclasses for a rotary expansible
chamber pump that is; (1) driven by a significantly claimed
motor, (2) operated by an art device, (3) claimed in
combination with another type of pump and (4) provided with
valving other than in-line valving or valving operating
merely to perfect the operation of some part of the pump and
see the Search Class note to Class 418 in the class
definition of Class 417 for an elaboration of the line
between these classes.
475, Planetary Gear Transmission Systems or Components, for
planetary gearing per se, and in combination with a nominally
claimed rotary expansible chamber device. The line between
Class 418 and Class 475 is the same as the line between Class
418 and Class 74.
GLOSSARY:
ABUTMENT
A partition member having relative movement with a cylinder
or reaction member of which it is a part and moving incident
to the expansion and contraction of the working chamber, the
cylinder or reaction member not constituting the working
member in this case.
CYLINDER
An external member having wall or surface portions forming
part of the working chamber of the rotary expansible chamber
device, the member being either fixed or movable and may
surround a fixed reaction member to move or be moved by the
working fluid and may also include an abutment or reaction
surface against which working fluid acts. However, the
abutment or reaction surface for the rotary expansible
chamber device need not necessarily be formed by the cylinder
but may be formed by relatively movable opposed rotating
members within the cylinder at least one of which is a
working member.
PARTITION MEMBER
A member either fixed or movable on either the cylinder
working member or other reaction member having a surface
portion forming part of the working chamber to either (1)
separate the working chamber into a plurality of working
fluid compartments or (2) separate the inlet from the outlet
of the rotary expansible chamber device.
VANE
A partition member which generally moves with the working
member but also has movement relative to the working member
incident to the expansion and contraction of the chamber.
The vane may be on the cylinder if the cylinder is the
working member.
WORKING CHAMBER
The space in an expansible chamber device which includes the
working member and which is adapted to receive working fluid
for acting upon the working member or for being acted upon by
the working member, the chamber expanding and contracting
incident to movement of the working member.
WORKING FLUID
The fluid (expansible or inexpansible) which is introduced
into and withdrawn from the working chamber of the rotary
expansible chamber device either to act upon or be acted upon
by the working member. Fluid which is withdrawn from the
working fluid supply for perfecting the operation of the
device is considered to be working fluid even though it never
enters the working chamber of the device. A fluid combined
with working fluid introduced into and exhausted with the
working fluid from the working chamber of the device used
merely to perfect the operation of the device (i.e., cooling,
sealing, lubricating, etc.), is considered to be a nonworking
fluid.
WORKING MEMBER
A movable member in a rotary expansible chamber device having
a surface portion disposed to either receive the energy of a
working fluid directed thereagainst for moving the member to
thereby produce a mechanical force output, or which, may move
a working fluid by the application of a mechanical force to
the movable member whereby fluid is admitted into and
exhausted from the expansible chamber. The working member
may include a movable vane thereon having a surface portion
for either receiving energy from or energizing a working
fluid passing through the expansible chamber.
SUBCLASSES
Subclass:
1
This subclass is indented under the class definition.
Methods.
Subclass:
2
This subclass is indented under the class definition.
Apparatus having (1) signals, indicators, registers,
recorders or gauges for indicating either a condition of
operation of the device or the condition or position of a
part thereof or (2) window means whereby the operation of the
device or the condition or position of a part thereof may be
readily observed.
(1) Note. For classification under part (1) of this
definition there must be either an indicia or an audible or
visible signal. Relative to indicia, there must be
graduation or markings in the disclosure as claimed. Where
it is indicated that the mere position of a part is
indicative of a condition of the device (e.g., valve handle
position corresponds to direction of working member rotation
or position of a part of the device) classification under
this definition does not result unless some cooperating
indicia are included.
SEE OR SEARCH CLASS:
73, Measuring and Testing, subclasses 232+ for expansible
chamber type volume or rate of flow meters and see References
to Other Classes in the class definition of this class for a
general statement of the line between this class and Class
73.
91, Motors: Expansible Chamber Type, subclass 1 for
signals, indicators or inspection means for expansible
chamber type motors.
92, Expansible Chamber Devices, subclass 5 for signals,
indicators or inspection windows for expansible chamber
devices.
Subclass:
3
This subclass is indented under the class definition.
Apparatus provided with two or more dissimilar rotary
expansible chamber devices.
(1) Note. Plural rotary expansible chamber devices of like
types differing only in size and shape are excluded from
classification here.
(2) Note. A rotary expansible chamber device differing from
another but which merely supplies a coolant, lubricant, etc.,
to the other is excluded from classification here, and is
classified in subclasses 83+.
(3) Note. Ordinarily, a rotary expansible chamber device of
the stationary cylinder type and a rotary expansible chamber
device of the moving cylinder type are considered to be
diverse and classifiable here. However, a rotary expansible
chamber device in which there is provided a rotating member
common to both types having surface portions forming part of
the working chamber surface of each type is not considered
proper for classification here. See subclass 160 for such
devices.
(4) Note. The following are considered to be dissimilar
rotary expansible chamber devices: (1) Sliding vane or
abutment type; (2) Swinging vane or abutment type; (3)
Interengaging rotary members; (4) Nested or
internal-external gear type; (5) Planetary; (6) Moving
cylinder; (7) Mutating; and (8) Other miscellaneous rotary
expansible chamber devices.
SEE OR SEARCH CLASS:
417, Pumps, appropriate subclasses, for diverse pumps and
motors wherein at least one pump or motor is not a rotary
expansible chamber device.
Subclass:
4
This subclass is indented under the class definition.
Apparatus in which the working chamber comprises spaced
partition members moving sequentially in curved and
substantially straight line paths of travel, the distance
between the partition members varying when moving in the
curved path of travel to thereby expand and contract the
working chamber.
Subclass:
5
This subclass is indented under the class definition.
Apparatus in which there is provided a plurality of working
chambers, at least one of the working chambers serially
receiving its working fluid at least in part form one other
working chamber, the working fluid either acting on or being
acted upon by the working member in each working chamber.
Subclass:
6
This subclass is indented under subclass 5. Apparatus wherein
a working chamber surrounds another working chamber with
which it is in working fluid series flow relationship.
Subclass:
7
This subclass is indented under subclass 5. Apparatus in
which a rotating working member in each working chamber
includes means for permitting working fluid to flow
substantially unimpeded therepast during a portion of a
revolution thereof and for producing work during another
portion of the revolution, a working member in one working
chamber permitting unimpeded working fluid flow therepast
while a working member in a prior or subsequent working
chamber is in work producing relationship with the working
fluid.
Subclass:
8
This subclass is indented under subclass 5. Apparatus in
which there is provided a plurality of working chambers
spaced about the periphery of the working member, at least
two of the working chambers being serially connected so that
a working member may sequentially act upon or be acted upon
by the same working fluid.
(1) Note. The space between adjacent vanes is not
considered to be a working chamber.
Subclass:
9
This subclass is indented under subclass 5. Apparatus in
which at least one of the working chambers is provided with a
plurality of members rotating about fixed or substantially
fixed axes having peripheral surface portions disposed to
maintain or substantially maintain line contact therebetween;
at least one of the rotating members being a working member.
Subclass:
10
This subclass is indented under subclass 9. Apparatus having
three or more rotating members at least one of which has a
peripheral surface engaging the peripheral surfaces of two or
more other rotating members.
Subclass:
11
This subclass is indented under subclass 5. Apparatus in
which at least one of the working chambers includes an
abutment member having an end surface normally maintained in
sealing engagement with the working member peripheral surface
and having side portions slidably received in the cylinder to
have sliding movement therein incident to the expansion and
contraction of the working member.
Subclass:
12
This subclass is indented under subclass 5. Apparatus in
which at least one of the working chambers includes an
abutment member having an end surface normally maintained in
sealing engagement with the working member peripheral surface
and is swingably mounted to the cylinder to have swinging
movement therewith incident to the expansion and contraction
of the working member.
Subclass:
13
This subclass is indented under subclass 5. Apparatus in
which at least one of the working chambers is provided with a
rotating working member having a vane member slidably mounted
thereon and having an end surface normally maintained in
sealing engagement with a peripheral cylinder surface forming
a part of the working chamber; the vane member having sliding
movement relative to the working member incident to the
expansion and contraction of the working chamber.
Subclass:
14
This subclass is indented under the class definition.
Apparatus in which upon start of the device an interval of
time elapses after which the working member of the device
produces work, the interval of time being the time required
for working chamber parts responding to a condition of
operation of the device to assume or acquire a normal working
or sealing relationship to overcome a working fluid bypass
condition present upon starting the device.
SEE OR SEARCH CLASS:
417, Pumps, subclasses 279+ for expansible chamber devices
having condition responsive pumped fluid control means.
Subclass:
15
This subclass is indented under the class definition.
Apparatus in which working fluid en route to or from the
working chamber of the device is either supplied thereto or
discharged therefrom by a plurality of passages separately
communicating therewith, each passage being at least adapted
to communicate with a separate fluid source or point of use.
(1) Note. Included herein are such devices in which working
fluid is either introduced into or exhausted from the working
chamber by a plurality of separate and distinct passages,
each passage ordinarily being connectible to a separate
working fluid source or place of use (or disposition) spaced
from the rotary expansible chamber device.
SEE OR SEARCH CLASS:
91, Motors: Expansible Chamber Type, subclass 21 for rotary
expansible chamber type motors having plural working fluid
passages for conducting working fluid to the working chamber
thereof, at least one of the passages having either a
separate, selectively adjustable fluid flow control member or
a separate fluid flow control portion of a unitary flow
control means for sequentially and selectively controlling
fluid flow through at least one other passage. However, a
plurality of such passages sequentially controlled by the
same portion of an adjustable fluid flow control member to
merely control thereby the rate of fluid flow to the working
chamber is not considered fluid flow through diverse paths
for classification in Class 91.
137, Fluid Handling, subclass 565.01 for a fluid system
including a pump having plural exhausts, each of which is
separately controlled and directed to a separate point of
use.
417, Pumps, subclasses 440+ for a significant pump having
plural exhausts one of which being controlled and exhausting
to waste.
Subclass:
16
This subclass is indented under the class definition.
Apparatus in which in addition to the relative movement
normally occurring between the working member and the other
working chamber surfaces in the operation of a rotary
expansible chamber device, the expansible chamber device has
a portion thereof mounted for relative movement, and movement
of which effects a change in a dimension of and therefore the
voluminal space comprising the working chamber to thereby
vary the amount of working fluid passing therethrough, no
change occurring in the working member rotational speed.
(1) Note. Those devices in which an adjustment is made to
provide a better sealing arrangement or compensate for wear
between cooperating parts and which may incidentally vary the
volumetric capacity are not classifiable here under this
definition and are classified either in subclasses 104+ or on
other features.
Subclass:
17
This subclass is indented under subclass 16. Apparatus in
which a dimension of the working chamber is variably
controlled in response to the speed of rotation of the
working member.
SEE OR SEARCH CLASS:
74, Machine Element or Mechanism, subclass 731.1 for gearing
with fluid drive having speed and/or torque responsive change
and see the search notes thereunder.
91, Motors: Expansible Chamber Type, subclass 458 for
expansible chamber motors having speed governor operated
valves and see the search notes thereunder.
192, Clutches and Power-Stop Control, subclass .032 and .033
for interrelated power delivery controls automatically
controlled by speed and see the search notes thereunder.
475, Planetary Gear Transmission Systems or Components,
subclasses 31+, for planetary gear transmission systems
having fluid drive or control.
Subclass:
18
This subclass is indented under subclass 16. Apparatus
including a plurality of members each of which is rotatable
about a common axis substantially in a common plane and
having working chamber surfaces rotating in the same path,
movement in one direction of at least one of the members
being alternately and relatively increased and retarded
whereby to expand and contact the working chamber and at
least one of the members producing work.
Subclass:
19
This subclass is indented under subclass 16. Apparatus
comprising a plurality of rotating members having undulating
or tooth-like surface projections disposed to maintain a
substantially fixed straight line of contact therebetween
against which working fluid reacts; at least one of the
rotatable members being a working member.
Subclass:
20
This subclass is indented under subclass 19. Apparatus having
three or more rotating members at least one of which has a
peripheral surface engaging the peripheral surfaces of two or
more rotating members.
Subclass:
21
This subclass is indented under subclass 19. Apparatus in
which a dimension of the working chamber is changed by moving
the cylinder or a part thereof or the working member in a
direction along the axis of rotation of the working member.
Subclass:
22
This subclass is indented under subclass 16. Apparatus
comprising two or more working chambers, a surface portion of
at least one of the chambers being movable to vary the
voluminal space thereof.
(1) Note. Circumferentially spaced working chambers about a
common working member are not considered plural working
chambers under this definition and such devices are
classified on other features.
(2) Note. The plural chambers may be separated by a common
intervening element having opposing surfaces each forming
part of a respective chamber.
(3) Note. A separate working fluid may be used for each
working chamber.
Subclass:
23
This subclass is indented under subclass 16. Apparatus in
which the effective volume of the working chamber is varied
by adjustably restricting the limit of outward movement of a
vane or abutment, from the working or cylinder member,
respectively, in which it is mounted whereby to control the
extent of sweeping contact of its outer edge with the
peripheral working chamber surface of the other member.
(1) Note. A vane or abutment adjustable merely for making a
better seal is not considered proper subject matter for
classification here and such devices have been classified in
subclasses 105 and 106.
Subclass:
24
This subclass is indented under subclass 16. Apparatus
provided with either a mechanical resilient means (e.g.,
spring) or a fluid pressure means other than that normally
occurring within the working chamber in the operation of the
device tending to move either the movable cylinder or portion
thereof or the working member relative to one another to
thereby vary the volumetric capacity of the working chamber.
(1) Note. The cylinder or outer member may be the working
member or it may be in the form of a ring or a segment
thereof.
SEE OR SEARCH CLASS:
417, Pumps, subclasses 212+ and especially subclass 220 for
rotary expansible chamber pumps in which the capacity is
varied by a movable member (e.g., stator) the member being
moved by the pump fluid and there being a condition
responsive valve control of the pump fluid in its application
or release to move the member.
Subclass:
25
This subclass is indented under subclass 24. Apparatus in
which either the cylinder or portion thereof or the working
member is urged to move in both a direction to enlarge the
working chamber and a direction opposite thereto.
(1) Note. Not included herein are variable capacity devices
pressure balanced by fluid or other means, the pressure
balancing thereof merely facilitating ease of adjustment of
the device by other means to thereby vary the working chamber
dimension.
Subclass:
26
This subclass is indented under subclass 25. Apparatus in
which the cylinder or the working member is urged to move in
at least one of the directions by the working fluid.
Subclass:
27
This subclass is indented under subclass 24. Apparatus
wherein either the cylinder or the working member is
positively urged in one direction by a resilient mechanical
means to vary the volumetric capacity of the device.
(1) Note. Included herein are devices where the force
exerted by pressures within the working chamber act against
the force exerted by the resilient mechanical means.
Subclass:
28
This subclass is indented under subclass 16. Apparatus in
which a dimension of the working chamber is changed by moving
a part thereof in a direction along the axis of rotation of
the working member.
Subclass:
29
This subclass is indented under subclass 16. Apparatus in
which either the working member or other inner rotatable
member forming a part of the working chamber is translatably
adjusted with respect to an adjacent surface of the cylinder
to thereby vary the volumetric dimension of the working
chamber.
Subclass:
30
This subclass is indented under subclass 16. Apparatus in
which the cylinder or segment thereof is hingedly connected
for swinging movement to thereby vary the volumetric capacity
of the working chamber.
Subclass:
31
This subclass is indented under subclass 16. Apparatus in
which the cylinder or a segment thereof is movable in a
direction normal to the working member rotational axis, that
portion of the cylinder or segment thereof nearest the
working member, when moved, having to or fro straight line
movement with respect to the working member rotational axis.
Subclass:
32
This subclass is indented under the class definition.
Apparatus in which there is provided a means movable to one
of a plurality of positions in response to a condition of
operation or a change in the condition of operation of the
device to either (1) allow reverse rotation of the working
member without reversing the direction of working fluid flow
or (2) allow reverse working fluid flow without reversing the
direction of working member rotation.
Subclass:
33
This subclass is indented under the class definition.
Apparatus including a plurality of members each of which is
rotatable about a common axis substantially in a common plane
and having working chamber surfaces rotating in the same
path, movement in one direction of at least one of the
members being alternately and relatively increased and
retarded whereby to expand and contract the working chamber
and at least one of the members producing work.
(1) Note. A rotary expansible chamber device having working
member portions (e.g., vanes, etc.), undergoing relative
acceleration and declaration only because of either the
eccentricity of the device or the working chamber design is
not deemed proper for classification here.
Subclass:
34
This subclass is indented under subclass 33. Apparatus in
which one of the members comprises an outer movable cylinder
having a surface against which motive fluid acts surrounding
a member having a surface of substantially like dimension
against which the motive fluid reacts.
Subclass:
35
This subclass is indented under subclass 33. Apparatus in
which each one of the rotatable members produces work.
Subclass:
36
This subclass is indented under subclass 35. Apparatus in
which the alternate relatively increased and retarded
movement of each working member is controlled by connecting
each working member to a separate member of an interengaging
rotating member group.
Subclass:
37
This subclass is indented under subclass 35. Apparatus in
which a rotating member rotating about an axis other than the
rotatable (working) member axis is either, per se, connected
to the working member or is connected thereto by an
intermediate member to rotate simultaneously therewith for
alternately increasing and decreasing the speed of movement
of the working member, a separate rotating member being
associated with each working member.
Subclass:
38
This subclass is indented under subclass 35. Apparatus in
which working member movement is controlled by coacting
elements one of which has a surface or groove of irregular
contour for controlling the movements of the other elements
and the working member associated therewith.
Subclass:
39
This subclass is indented under the class definition.
Apparatus, (A) adapted to be rearranged to perform different
functions or (B) adapted to be altered so as to operate in a
different way or change its function or enhance its operation
in some way by (1) disassembling the apparatus in some
portion and then reassembling the apparatus with the same or
different portion, (2) disassembling some portion from the
apparatus, or (3) assembling some portion of the apparatus.
(1) Note. A mere adjustment of some part of the rotary
expansible chamber device merely to perfect its cooperation
with another part of the device is not considered proper for
classification here. Such devices will be found in
subclasses 104+.
(2) Note. A portion of a rotary expansible chamber device,
such as for example a working chamber liner which is adapted
to be reversed, replaced, removed or added to present a new
working member engaging surface but which does not change the
mode of operation of the device is excluded from this
subclass, however, where such a change effects a change in
the size or shape of the device, classification is in this
subclass.
(3) Note. A reversible device in which is provided either a
plurality of vanes or a plurality of abutments, some of which
are placed in a nonworking position while the remaining ones
are in a working position and vice versa depending on the
desired direction of rotation of the working member is not
considered to be convertible for classification here. Such
devices are found in subclass 239.
Subclass:
40
This subclass is indented under the class definition.
Apparatus in which means responsive to the speed of rotation
of the working member is provided to govern the speed of
rotation of the working member whereby an optimum speed of
rotation thereof may not be exceeded.
(1) Note. The means may be adjustable to adapt the working
member of the device to operate at but not exceed any desired
working member speed of rotation.
Subclass:
41
This subclass is indented under subclass 40. Apparatus in
which the means comprises a mass of solid material subject to
a centrifugal force commensurate with the speed of rotation
of the working member and movable in a direction to, per se,
impede working fluid flow through the expansible chamber
device when an optimum speed of working member rotation tends
to be exceeded.
(1) Note. Included in this definition is an enlarged mass
of solid material and any other element rigidly connected
therewith.
Subclass:
42
This subclass is indented under subclass 40. Apparatus in
which the means comprises a rotating mass of solid material
which is mounted either (1) to an outer surface of the
working member or (2) to the working member within the
confines of its periphery.
SEE OR SEARCH THIS CLASS, SUBCLASS:
185 for a working member having an inlet or an outlet
passage therethrough controlled by a movable flow restricting
means positioned therein.
Subclass:
43
This subclass is indented under subclass 40. Apparatus in
which the means comprises a mass of solid material which
rotates about an axis either (1) coincident with or (2)
parallel to the working member axis of rotation.
Subclass:
44
This subclass is indented under subclass 43. Apparatus in
which the mass of solid material rotates about an axis other
than the axis of rotation of the working member.
Subclass:
45
This subclass is indented under the class definition.
Apparatus in which the working chamber is formed at least in
part by a flexible wall, said wall being progressively
distorted by contact with a member external thereto having a
surface substantially circumferentially coextensive therewith
to expand or contract the working chamber.
(1) Note. For a definition of collapsible wall, see Class
92, Expansible Chamber Devices, subclass 89.
(2) Note. A flexible coating material forming a surface of
the working chamber disclosed merely for wear prevention,
sealing, protection against corrosiveness, etc., of the
coated part is not considered to be a flexible wall for
classification here. See this class, subclass 152 and the
notes therein for rotary expansible chamber devices having
parts either coated with or made of non-metallic material.
Subclass:
46
This subclass is indented under the class definition.
Apparatus in which the rotary expansible chamber device is
provided with either (1) a trap or screen means to
respectively collect or separate solid foreign material from
the working fluid either in the working chamber or at the
inlet or outlet thereto or (2) an enlargement of a working
chamber part especially designed for allowing passage of
solid foreign material laden working fluid through the
working chamber of the device, the trap or screen means or
the enlargement of the working chamber part enhancing the
operation of the expansible chamber device.
(1) Note. Not included under part 2 of this definition are
devices wherein there is included a seal, wear or other
coating means forming part of the working chamber surface
which may either be moved by or absorb the abrasive effect of
the working fluid and any solid impurities therein. Nor are
devices wherein the working member or the cylinder is made of
nonmetallic material included here. However, such devices
provided with an additional enlarged means especially
designed for coping with solid foreign material in the
working fluid are deemed proper for classification here.
(2) Note. The removal of foreign particles from between
substantially contacting relatively moving surfaces of the
device by flushing with either pressurized fluid or mere
leakage fluid is not considered proper for classification
here. Such devices have been classified on other features.
(3) Note. A working fluid may include solid particles not
considered to be foreign material (e.g., cement, wood pulp,
etc.).
Subclass:
47
This subclass is indented under subclass 46. Apparatus
wherein there is provided a screen device to strain incoming
working fluid.
Subclass:
48
This subclass is indented under the class definition.
Apparatus in which a cylinder and a rotating working member
of substantially like axial extent have interfitting internal
and external helical surfaces of unlike pitch, rotation of
the working member causing relative gyratory movement between
the cylinder and the working member to thereby expand and
contact the working chamber.
(1) Note. Such devices wherein the cylinder is the working
member are considered proper for classification here.
(2) Note. Included herein are devices in which the cylinder
is made of a tubular material, helical surfaces thereon being
formed by the helical surfaces of the working member pressing
thereagainst.
Subclass:
49
This subclass is indented under the class definition.
Apparatus in which the working member includes a working
chamber forming surface having cyclic wobbling or undulating
motion and having progressively moving line contact with a
complementary working chamber forming surface of another
member to thereby produce a rotating working chamber, the
central axis of the working member describing a cone whose
apex is the point about which the working member wobbles.
Subclass:
50
This subclass is indented under subclass 49. Apparatus in
which the working member or other working chamber part is
either made of or coated with a nonmetallic material.
(1) Note. A mere seal means made of nonmetallic material is
not considered proper for classification here. See
subclasses 104 for mechanical sealing and 152 for a
nonmetallic working member, cylinder or partition.
Subclass:
51
This subclass is indented under subclass 49. Apparatus in
which either the working member or the other member is
provided with a movable, expandable, adjustable or deformable
means for engaging the other of said members to oppose the
passage of working fluid therepast to constrain the working
fluid to move in a prescribed path of flow.
SEE OR SEARCH THIS CLASS, SUBCLASS:
104 and the subclasses thereunder for other rotary
expansible chamber devices having sealing means.
Subclass:
52
This subclass is indented under subclass 49. Apparatus in
which a single working member has opposed working surfaces,
each of which forms a movable surface of a separate working
chamber for expanding and contracting the working chamber.
Subclass:
53
This subclass is indented under subclass 52. Apparatus in
which the working chambers are spaced in a direction
generally along or parallel to the working member axis about
which it wobbles.
Subclass:
54
This subclass is indented under the class definition.
Apparatus in which the working member either (1) rotates
about its axis while the axis moves in an orbit or (2) has
circular translatory or oscillatory movement without rotation
or substantial rotation about its axis while the axis moves
in an orbit.
Subclass:
55.1
Helical working member, e.g., scroll:
This subclass is indented under subclass 54. Apparatus in
which the working member includes continuous working portions
in the form of a spiral either (1) lying in the same plane
and having increasing radius or (2) extending axially.
Subclass:
55.2
Having specific wrap or end plate, e.g., shape, material,
coating:
This subclass is indented under subclass 55.1. Apparatus in
which the end plate or wrap has a specific shape, or coating
or is made out of a specific material.
Subclass:
55.3
With specific rotation preventing or rotation coupling
means:
This subclass is indented under subclass 55.1. Apparatus in
which (1) a locking means prevents the moveable scroll from
rotating and forces the moveable scroll to move in an orbital
motion or (2) a connecting means joins both scrolls for
relative movement about an eccentric axis.
Subclass:
55.4
With mechanical sealing:
This subclass is indented under subclass 55.1. Apparatus in
which a means is provided to prevent leaking of the working
fluid.
SEE OR SEARCH CLASS:
277, Seal for a Joint or Juncture, for a generic sealing
means or process, subclass 398 for a relatively rotatable
radially extending sealing face member (e.g., face,
mechanical, etc.) that accommodates or exhibits eccentric,
gyratory, or oscillatory motion or subclasses 399+ for a
relatively rotatable radially extending sealing face member
(e.g., face, mechanical, etc.) having a particular
configuration.
Subclass:
55.5
With biasing means, e.g., axial or radial:
This subclass is indented under subclass 55.1. Apparatus in
which a means is provided to keep the scrolls in sealing
engagement.
Subclass:
55.6
With lubricant, liquid seal or nonworking fluid separation:
This subclass is indented under subclass 55.1. Apparatus in
which a means is provided to remove a lubricant, liquid seal
or nonworking fluid from the working fluid.
Subclass:
56
This subclass is indented under subclass 54. Apparatus in
which the working member, cylinder or partition element is
either made of or coated with a nonmetallic material.
(1) Note. A mere seal means made of nonmetallic material is
not classifiable here. Classification of such devices will
be made on other features.
Subclass:
57
This subclass is indented under subclass 54. Apparatus in
which means is provided to either (1) selectively move the
working member with respect to the cylinder wall surface or
(2) positively urge the working member into sealing
engagement with the cylinder wall surface by a spring or
other biasing means as the working member moves incident to
the expansion and contraction of the working chamber.
Subclass:
58
This subclass is indented under subclass 54. Apparatus in
which there is provided either (1) a plurality of working
members mounted to rotate in the same or different working
chambers or (2) two or more working chambers.
Subclass:
59
This subclass is indented under subclass 58. Apparatus in
which at least one working chamber surrounds another.
Subclass:
60
This subclass is indented under subclass 58. Apparatus in
which at least one of the plurality of working members is
spaced in the direction of or along the rotational axis of
one other working member.
Subclass:
61.1
Circumferentially spaced working chambers:
This subclass is indented under subclass 58. Apparatus in
which there is provided a plurality of working chambers
spaced about the periphery of the working member, the working
chambers being successively alternately filled and exhausted
by the oscillating rotating motion of the working member.
Subclass:
61.2
Rotor has one more than cylinder (i.e., wankel type):
This subclass is indented under subclass 61.1. Apparatus
wherein the working member has one lobe more than the number
of working chambers.
Subclass:
61.3
Rotor has one less lobe than cylinder (i.e., gerotor type):
This subclass is indented under subclass 61.1. Apparatus
wherein the working member has one lobe less than the number
of working chambers.
Subclass:
62
This subclass is indented under subclass 54. Apparatus in
which a bladelike element is hingedly connected to both the
working member and to the cylinder.
Subclass:
63
This subclass is indented under subclass 54. Apparatus in
which there is provided a displaceable divider element
mounted on either the cylinder member or the working member
but engaging the other member and moving incident to the
expansion and contraction of the working chamber to separate
the low and high pressure zones of the working chamber.
Subclass:
64
This subclass is indented under subclass 63. Apparatus in
which the divider element has reciprocal movement in the
working member.
Subclass:
65
This subclass is indented under subclass 63. Apparatus in
which the divider element is provided with a passage means to
allow ingress or egress of the working fluid.
(1) Note. A blade-like partition element having a passage
for pressurized working fluid for biasing the blade-like
partition element but not for intake or exhaust of working
fluid to or from the working chamber is not classifiable
here. See subclass 249 for fluid biased abutments and
subclasses 267 and 268 for fluid biased vanes.
Subclass:
66
This subclass is indented under subclass 63. Apparatus in
which the divider element and the working member are either
(1) inseparable component parts of a unitary structure or (2)
are separable parts rigidly connected for concurrent
movement.
Subclass:
67
This subclass is indented under subclass 63. Apparatus in
which the divider element is hingedly connected to the
working member.
Subclass:
68
This subclass is indented under the class definition.
Apparatus in which in addition to rotary movement a rotating
internal member has periodic to-and-fro movement incident to
the expansion and contraction of the working chamber.
Subclass:
69
This subclass is indented under the class definition.
Apparatus in which (1) there is provided in the working
member drive a weakened member designed to break or rupture
on overload of the working member to thereby discontinue the
drive or (2) a releasable means is provided in the drive
connected to the working member for interrupting the drive
either in response to a condition of operation of the device
or at the will of an operator.
Subclass:
70
This subclass is indented under the class definition.
Apparatus in which the device is made of detachably secured
parts which are readily assembled or disassembled by manually
operable securing means only and without the aid or use of a
tool means.
(1) Note. The manually operable securing means may include
an enlarged portion or a portion so made as to provide a
mechanical advantage to thereby facilitate manual assembly or
disassembly of the device.
Subclass:
71
This subclass is indented under the class definition.
Apparatus in which radial forces or bias acting on a rotating
member periphery because of fluid pressure in a pressure area
or zone comprising part of the working chamber is
substantially counterbalanced by an opposing area or zone of
substantially equal pressure acting either on the rotating
member periphery or the mounting means therefor.
(1) Note. A counterbalancing zone or force may be in a
resultant direction substantially opposite a resultant zone
or force.
(2) Note. The mere filling of intervene or inter-tooth
spaces which may also tend to counter-balance the radial
forces caused by exhaust or inlet fluid pressure is not
deemed proper for classification here; nor are opposing inlet
or outlet zones, per se, considered proper for classification
here. Such devices are classified on other features.
Subclass:
72
This subclass is indented under subclass 71. Apparatus in
which the opposing fluid zones are spaced about the rotating
member periphery and are inter-connected by passage means
extending through the rotating member.
Subclass:
73
This subclass is indented under subclass 71. Apparatus
wherein at least one of the opposing fluid zones is at the
journal means for the rotating member.
Subclass:
74
This subclass is indented under subclass 71. Apparatus in
which at least one of the opposing fluid zones comprises a
part of the working chamber and the counterbalancing fluid
directed thereto pressurizes the space between adjacent vane
or tooth surfaces.
SEE OR SEARCH THIS CLASS, SUBCLASS:
180 for similar devices wherein pressurized fluid at the
high pressure working chamber zone is directed to a lower
pressure working chamber zone.
Subclass:
75
This subclass is indented under the class definition.
Apparatus in which there is provided an elongate, relatively
shallow recess or depression of substantially the same
cross-sectional dimension along its center line on at least
one-side surface of either one of the adjacent substantially
engaging cylinder or rotating member side surface, the recess
or depression being other than the inlet or outlet or a part
of the inlet or outlet of the device.
(1) Note. The recess or depression may be fluidly connected
to the inlet or outlet of the device or may be connected to a
source of nonworking fluid or it may collect leakage pressure
fluid only.
(2) Note. The recess or depression enhances the operation
of the device and may be used for lubricating, cooling,
sealing, balancing, conducting fluid to or from a vane slot,
etc.
(3) Note. A mere port is not considered proper for
classification here, however, a port having a flared mouth
portion is considered classifiable here. Otherwise, the
elongate shallow recess or depression has substantially the
same dimensions about its center line for a substantial
portion of its length.
Subclass:
76
This subclass is indented under subclass 75. Apparatus in
which fluid other than working fluid is positively directed
to the shallow recess or depression.
(1) Note. Devices having grooves receiving leakage fluid
whether working non working or a mixture thereof are not
considered proper for classification here. See subclass 75
and subclasses 77 through 82 for similarly grooved devices.
Subclass:
77
This subclass is indented under subclass 75. Apparatus in
which the working member is provided with the shallow recess
or depression.
Subclass:
78
This subclass is indented under subclass 75. Apparatus in
which the shallow recess or groove traverses a plurality of
spaces formed in part by adjacent sides of adjacent vanes or
tooth-like projections on a working member, one end of the
shallow recess or groove terminating in zone of higher or
lower fluid pressure to at least sequentially interconnect
the spaces with the fluid pressure zone.
Subclass:
79
This subclass is indented under subclass 75. Apparatus in
which the shallow recess or depression has parallel sides or
edges parallel to a radial line therebetween extending from
the axis of rotation of the working member.
Subclass:
80
This subclass is indented under subclass 75. Apparatus in
which an abutting surface has a plurality of spaced shallow
recesses or depressions of which at least two are spaced at
unequal distances from the working member axis of rotation.
(1) Note. Two or more members may combine to form the
abutting surface.
Subclass:
81
This subclass is indented under subclass 75. Apparatus in
which the abutting surface is provided with a ring-like
recess or depression extending entirely around the working
member axis of rotation.
(1) Note. The recess or depression may be formed by surface
portions of each of a plurality of members, one of which
having a surface in abutting relationship with the adjacent
working member surface.
Subclass:
82
This subclass is indented under subclass 75. Apparatus in
which the elongated recess or depression lies in a path
traversed by the vane slot of a rotating working member for
fluid communication therebetween.
Subclass:
83
This subclass is indented under the class definition.
Apparatus in which there is provided means to either (1) heat
or cool either the working or the nonworking fluid or any
part of the device, (2) direct a fluid other than working
fluid to the device or to the working fluid to provide a film
or coating between adjacent surfaces of a plurality of
relatively moving parts to prevent direct rubbing contact
therebetween or passage of working fluid therepast or (3) at
least partially immerse the device in a nonworking liquid
whereby to enhance the operation of the device.
(1) Note. A lubricating or sealing agent comprising
nonworking finely divided solids having flow characteristics
of a fluid, performing a lubricating or sealing function
under part 2 of the above definition is considered proper for
classification here.
Subclass:
84
Apparatus under 83 in which there is provided means for
sensing either a condition of operation or a change in a
condition of operation of the device and for controlling
nonworking fluid flow in response thereto.
SEE OR SEARCH CLASS:
417, Pumps, subclass 228 for similar subject matter in which
the pump is of the reciprocating type.
Subclass:
85
This subclass is indented under subclass 83. Apparatus
wherein the nonworking fluid is itself heated or cooled by
means specifically designed to either add or remove heat
therefrom prior to its entry to the device or working parts
thereof.
Subclass:
86
This subclass is indented under subclass 83. Apparatus in
which the working fluid either prior to entering or upon
leaving the working chamber is caused to follow a tortuous
path thereabout for either giving off or absorbing heat in
the operation of the device.
(1) Note. Incidental heat exchange by working fluid
entering or leaving the working chamber of the device by the
most direct or expeditious path is not considered proper for
classification here. Also, diversion of a portion of the
working fluid merely for lubrication purposes but which may
incidentally cool is not considered proper for classification
here and classification of such devices will be based on
other features.
Subclass:
87
This subclass is indented under subclass 83. Apparatus in
which the flow of nonworking fluid to the relatively moving
surfaces may be varied by the adjustment of a movable flow
restrictive means in the path of flow.
Subclass:
88
This subclass is indented under subclass 83. Apparatus in
which nonworking fluid is positively applied to the device or
part thereof by a fluid displacement device having a movable
fluid displacing element for impelling the nonworking fluid
thereto.
SEE OR SEARCH THIS CLASS, SUBCLASS:
101 for devices in which a fan or other air impelling means
directs air to an outer surface of the device to remove heat
therefrom generated in the operation of the device.
Subclass:
89
This subclass is indented under subclass 83. Apparatus
provided with porous means to remove physical impurities from
the nonworking fluid.
Subclass:
90
This subclass is indented under subclass 83. Apparatus in
which the nonworking fluid is fed by means of the capillary
action of an element either to the incoming working fluid for
contacting therewith the relatively moving parts of the
device or directly to one of the relatively movable parts of
the device.
Subclass:
91
This subclass is indented under subclass 83. Apparatus in
which an inner working or reacting member is provided with a
flow path or passageway for conducing nonworking fluid
therethrough.
(1) Note. The working and nonworking fluid may be
intermixed.
SEE OR SEARCH THIS CLASS, SUBCLASS:
101 for rotary expansible chamber devices having a central
passage therethrough open to the atmosphere combined with
ambient air impelling means to move the air through the
passage for removing heat generated in the operation of the
device. However, similar devices in which the working member
has at least one passage portion extending generally radially
so that air passing therethrough is caused to approach the
working member circumferentially periphery to remove heat
therefrom are classified here.
Subclass:
92
This subclass is indented under subclass 91. Apparatus
comprising a working member with a vane wherein the
nonworking fluid flow path includes a passageway or duct
means through the vane.
Subclass:
93
This subclass is indented under subclass 91. Apparatus in
which the device includes a vane which is moved into cylinder
wall engagement either by (1) pressurized nonworking fluid
directed to the vane slot or (2) pressurized working fluid
combined with a nonworking fluid directed to the vane slot.
Subclass:
94
This subclass is indented under subclass 91. Apparatus in
which the flow path for the nonworking fluid includes a duct
means in the drive shaft of the device.
Subclass:
95
This subclass is indented under subclass 83. Apparatus in
which the working and nonworking fluids are in separate
compartments of the device and including means intermediate
the compartments to divert or vent away either fluid tending
to move in a direction to mix with the other fluid.
(1) Note. A mere seal means between the two compartments is
not considered proper for classification here. See subclass
104 for such subject matter.
Subclass:
96
This subclass is indented under subclass 83. Apparatus in
which the device is placed in a liquid so that the cylinder
thereof is at least partially covered thereby.
Subclass:
97
This subclass is indented under subclass 83. Apparatus in
which the nonworking fluid enters the working chamber of the
device to mix with the working fluid therein either (1) by
directly conducting the nonworking fluid to the working
chamber or (2) by the leakage or flow of the nonworking fluid
thereto after being initially directed to another part of the
device.
Subclass:
98
This subclass is indented under subclass 97. Apparatus in
which the nonworking fluid is initially directed to impinge
on the shaft trunnions or bearings of the device from whence
it passes to enter into a zone of lower pressure of the
working chamber.
Subclass:
99
This subclass is indented under subclass 97. Apparatus in
which the nonworking fluid is initially directed to impinge
against the working member from whence it passes to enter
into a zone of lower pressure of the working chamber.
Subclass:
100
This subclass is indented under subclass 83. Apparatus in
which the nonworking fluid is initially directed so as to
unite with the working fluid prior to its entry into the
working chamber of the device.
Subclass:
101
This subclass is indented under subclass 83. Apparatus in
which there is provided either a means to produce and direct
a current of air to a surface of the rotary expansible
chamber device or a projection means on the cylinder surface
for dissipating heat to the atmosphere whereby heat generated
in the operation of the device is removed therefrom.
Subclass:
102
This subclass is indented under the class definition.
Apparatus in which at least part of the working fluid is
directed by means of a passageway to another part of the
device to provide a film or coating between adjacent surfaces
of relatively moving parts to prevent direct rubbing contact
therebetween or passage of working fluid or ambient air
therepast.
Subclass:
103
This subclass is indented under the class definition.
Apparatus in which the working member includes a plurality of
parts having working chamber surface portions movable
relative to each other in the direction of working member
rotation as the working member rotates.
Subclass:
104
This subclass is indented under the class definition.
Apparatus in which a working chamber part comprising either
the working member, cylinder or partition member is provided
with a movable, expansible, adjustable or deformable means
having at least substantial engagement with another working
chamber part to oppose the passage of working fluid therepast
to constrain the working fluid to move in a prescribed path
of flow.
(1) Note. The means may include an adjustable working
member or cylinder.
(2) Note. A movable vane or abutment moved incident to the
expansion and contraction of the expandable chamber is not
considered to be sealing, however, if additionally to such a
vane or abutment there is provided a movable, expandable,
adjustable or deformable means enabling closer tolerances to
be maintained between the relatively moving parts to thereby
oppose the passage of fluid therebetween such is considered
to be sealing and proper for classification here.
SEE OR SEARCH THIS CLASS, SUBCLASS:
179 for rotary expansion chamber devices made of specific or
diverse materials whereby sealing may be obtained or
maintained solely by the difference in expansion
characteristics of the material.
SEE OR SEARCH CLASS:
277, Seal for a Joint or Juncture, for a generic sealing
means or process, subclass 357 for a dynamic seal for a
rotary piston.
Subclass:
105
This subclass is indented under subclass 104. Apparatus in
which the abutment is movable and is provided with an
adjusting means for repositioning the abutment to compensate
for wear.
Subclass:
106
This subclass is indented under subclass 104. Apparatus
wherein the vane is movable and is provided with an adjusting
means for repositioning the vane to compensate for wear.
Subclass:
107
This subclass is indented under subclass 104. Apparatus in
which the working member and the cylinder are bodily movable
relative to each other for establishing or maintaining a line
or arcuate surface of contact therebetween to oppose the
passage of working fluid therepast.
Subclass:
108
This subclass is indented under subclass 107. Apparatus in
which the working member and the cylinder are mounted for
relative movement normal to the axis of rotation.
Subclass:
109
This subclass is indented under subclass 108. Apparatus
wherein the working member is mounted for adjustment normal
to its axis of rotation.
Subclass:
110
This subclass is indented under subclass 104. Apparatus
wherein the working member comprises a plurality of axially
movable portions of substantial dimension, each having a side
surface movable into sealing relationship with a respective
cylinder side.
Subclass:
111
This subclass is indented under subclass 104. Apparatus
wherein a vane or an abutment comprises a plurality of
axially movable portions of substantial dimension having end
surfaces movable into sealing relationships with respective
cylinder sides.
(1) Note. A vane or abutment provided with axially movable
seal means at its ends to engage the cylinder sides is not
considered to comprise a plurality of axially movable
portions of substantial dimension and is classified in the
appropriate sealing subclasses below.
Subclass:
112
This subclass is indented under subclass 104. Apparatus in
which the movable, expandable, adjustable or deformable means
is mounted on the working member periphery to have wiping
contact with the cylinder peripheral surface.
Subclass:
113
This subclass is indented under subclass 112. Apparatus
wherein the working member includes a protruding (e.g., apex)
portion on its periphery which is provided with a movable,
expandable, adjustable or deformable means for engaging a
cylinder working chamber surface to oppose the passage of
working fluid therepast and wherein the movable, expandable,
adjustable or movable means does not move or is a part of a
member that moves incident to the expansion or contraction of
the working chamber.
Subclass:
114
This subclass is indented under subclass 113. Apparatus
wherein the working member includes a protruding part that is
either (1) fixedly repositionable thereon or (2) integral
therewith but extendable thereon, the part being movable to
sealingly engage another working chamber surface.
Subclass:
115
This subclass is indented under subclass 113. Apparatus in
which the movable, expandable, adjustable or deformable means
is either (1) interconnected with a weight so that outward
movement thereto because of centrifugal force is at least
partially counterbalanced by the weight or (2) is fixedly
attached to the working member and is adapted to be moved to
at least one other fixed position thereon.
Subclass:
116
This subclass is indented under subclass 113. Apparatus in
which the movable, expandable, adjustable or deformable means
is at least in part, in the form of a circular band or loop
and lies in a plane generally normal to the direction of
working member rotation.
Subclass:
117
This subclass is indented under subclass 113. Apparatus in
which there is provided at least two separate, movable,
expandable, adjustable or deformable means on a protruding
portion of the working member for engaging the cylinder
working chamber surface.
Subclass:
118
This subclass is indented under subclass 113. Apparatus in
which the deformable, expandable, adjustable or deformable
means has an end portion pivotally secured to the working
member, the other end being movably maintained in wiping
contact with the cylinder working chamber peripheral surface
to oppose the passage of working fluid therepast.
Subclass:
119
This subclass is indented under subclass 113. Apparatus in
which the movable, expandable, adjustable or deformable means
includes an elongate side portion integral or immovably fixed
therewith of substantially greater radial dimension to depend
therefrom for engaging the working chamber cylinder side
surface.
Subclass:
120
This subclass is indented under subclass 113. Apparatus in
which the movable, expandable, adjustable or deformable means
is movable in a direction along or parallel to the working
member rotational axis.
Subclass:
121
This subclass is indented under subclass 120. Apparatus in
which the movable, expandable, adjustable or deformable means
is positively urged to engage a cylinder working chamber side
surface by means of a resilient, deformable, mechanical
device.
Subclass:
122
This subclass is indented under subclass 113. Apparatus in
which the means for urging the movable, expandable or
deformable means includes a resilient mechanical device.
Subclass:
123
This subclass is indented under subclass 122. Apparatus in
which the means for urging the movable, expandable or
deformable means includes a pressurized fluid.
Subclass:
124
This subclass is indented under subclass 113. Apparatus in
which the means for urging the movable, expandable or
deformable means comprises a pressurized fluid.
Subclass:
125
This subclass is indented under subclass 104. Apparatus in
which the movable, expandable, adjustable or deformable means
is mounted on the cylinder to have wiping contact with the
rotary member periphery to prevent leakage of fluid
therebetween.
SEE OR SEARCH THIS CLASS, SUBCLASS:
191 for interengaging rotary members and see the search note
to this subclass (125) in the definition thereto for the
distinction between similar subject matter in these
subclasses.
Subclass:
126
This subclass is indented under subclass 125. Apparatus in
which the expandable, movable, adjustable or deformable means
has wiping contact with the periphery of each of a plurality
of rotary members.
Subclass:
127
This subclass is indented under subclass 125. Apparatus in
which means is provided to selectively move the movable,
expandable, adjustable or deformable means into sealing
engagement with the rotary member surface.
Subclass:
128
This subclass is indented under subclass 127. Apparatus in
which there is provided an elastic biasing means intermediate
the selective moving means and the movable, expandable,
adjustable or deformable means to urge the last mentioned
means into engagement with the rotary member surface.
Subclass:
129
This subclass is indented under subclass 125. Apparatus in
which there is provided an elastic biasing means to urge the
expandable, movable, adjustable or deformable means into
engagement with the rotary member surface.
Subclass:
130
This subclass is indented under subclass 104. Apparatus in
which there is provided an axially movable cylinder member
having an annular, axially extending lip portion abutting an
adjacent cylinder surface portion to thereby oppose the
passage of working fluid therepast, the axially movable
cylinder member and the adjacent cylinder surface cooperating
to produce a cavity in which a member having a peripheral
surface forming part of the working chamber is housed.
Subclass:
131
This subclass is indented under subclass 104. Apparatus in
which the cylinder comprises a side plate or end wall or a
portion thereof having a face or surface axially movable into
engagement with the adjacent working member side face or
surface to oppose the passage of working fluid therepast.
Subclass:
132
This subclass is indented under subclass 131. Apparatus
wherein the side plate or end wall is urged into sealing
engagement with the side of the working member, the urging
thereof being in opposition to and at least substantially
commensurate with the differing working fluid pressures
within the working chamber as the working fluid moves from
inlet to outlet thereof.
Subclass:
133
This subclass is indented under subclass 131. Apparatus
wherein the side of the end wall engaging the working member
has a portion abutting an adjacent face or surface portion of
the cylinder which is coplanar with the working member face,
the cylinder being either fixed or moving.
Subclass:
134
This subclass is indented under subclass 131. Apparatus in
which means is provided to selectively move the end plate
into sealing engagement with the adjacent working member side
surface.
(1) Note. An end plate or wall may consist of a ring-like
plate member having a surface forming a complete wall of the
working chamber.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 140+ for ring-like members for providing a seal
means between the working member and cylinder and which may
incidentally form a surface portion of the working chamber.
Subclass:
135
This subclass is indented under subclass 131. Apparatus
wherein a resilient mechanical means urges the end plate or
wall into engagement with the working member side.
Subclass:
136
This subclass is indented under subclass 104. Apparatus in
which the means is mounted on either the working member or
the vane but engages the other to oppose the passage of
working fluid therepast.
Subclass:
137
This subclass is indented under subclass 136. Apparatus
wherein the means opposing the passage of working fluid is
mounted on the working member.
Subclass:
138
This subclass is indented under subclass 137. Apparatus in
which the means opposing passage of working fluid is rockable
about its axis.
SEE OR SEARCH THIS CLASS, SUBCLASS:
241 for similar devices in which a seal element between the
working member and the vane is not provided.
Subclass:
139
This subclass is indented under subclass 104. Apparatus
provided with a movable abutment and means mounted thereon or
on either the working member or the cylinder for engagement
therebetween to oppose the passage of fluid therepast.
Subclass:
140
This subclass is indented under subclass 104. Apparatus
provided with a means mounted on either the cylinder or the
working member but either engaging the other or having slight
clearance with the other to oppose the passage of fluid
therepast.
Subclass:
141
This subclass is indented under subclass 140. Apparatus
wherein the means opposing the passage of fluid comprises a
succession of baffles having slight clearance with each other
to impede the passage of fluid by the tortuous path made
thereby.
Subclass:
142
This subclass is indented under subclass 140. Apparatus
wherein the means opposing the passage of fluid is mounted or
positioned on the working member.
Subclass:
143
This subclass is indented under subclass 142. Apparatus
wherein the means opposing the passage of fluid is mounted or
positioned on the working member circumferential surface.
Subclass:
144
This subclass is indented under subclass 140. Apparatus
wherein the means opposing the passage of fluid is mounted or
positioned on the side surfaces (i.e., end face) of the
cylinder to engage the adjacent side surface of the working
member.
Subclass:
145
This subclass is indented under subclass 104. Apparatus ...
in which the working member is provided with a movable vane
having a movable, expandable, adjustable or deformable means
mounted thereon for engaging the cylinder to oppose the
passage of working fluid therepast.
Subclass:
146
This subclass is indented under subclass 145. Apparatus in
which the means opposing the passage of fluid is mounted to
extend beyond the side edge of the vane to engage the
adjacent working chamber surface.
Subclass:
147
This subclass is indented under subclass 145. Apparatus in
which the means opposing the passage of fluid is movable
mounted or positioned on the vane.
Subclass:
148
This subclass is indented under subclass 147. Apparatus in
which the means opposing the passage of fluid is movable and
is biased into engagement or maintained in engagement with
the cylinder surface by means other than an inherent property
of the opposing means.
(1) Note. For example, gravity, centrifugal force, and
elasticity are deemed to be inherent properties of a sealing
element.
Subclass:
149
This subclass is indented under subclass 104. Apparatus
provided with means mounted or positioned on a cylinder
portion to engage another cylinder portion to oppose the
passage of fluid therepast.
Subclass:
150
This subclass is indented under the class definition.
Apparatus in which either the cylinder or working member
surface forming part of the expansible working chamber is
represented in a claim by a mathematical formula or
equation.
Subclass:
151
This subclass is indented under the class definition.
Apparatus in which the device is provided with a mass of
material rotatable with the working member and positioned so
that it at least partially opposes unbalanced forces of
either (1) the rotating working member or (2) a movable part
thereon moving incident to the expansion and contraction of
the working chamber.
SEE OR SEARCH THIS CLASS, SUBCLASS:
210 for devices in which axially spaced rotating working
members counterbalance each other.
Subclass:
152
This subclass is indented under the class definition.
Apparatus in which the working member, cylinder, vane or
abutment is either made of or coated with a nonmetallic
material.
(1) Note. A mere seal means made of nonmetallic material
for the vane, abutment or working member is excluded here.
See subclass 104 for such seals.
Subclass:
153
This subclass is indented under subclass 152. Apparatus in
which the nonmetallic material is a deformable elastic
material.
Subclass:
154
This subclass is indented under subclass 153. Apparatus in
which the working member is provided with a vane member
thereon, the working member and the vane member comprising a
resilient impartible unit of manufacture.
Subclass:
155
This subclass is indented under subclass 154. Apparatus in
which the vane extends axially from a working member side to
engage and be deflected by the undulating surface of the
opposing working chamber side to expand and contract the
working chamber.
Subclass:
156
This subclass is indented under the class definition.
Apparatus in which the working member, cylinder or a
partition element on either the working member or the
cylinder comprises a flexible working chamber portion flexing
relative to the expansion and contraction of the working
chamber.
Subclass:
157
This subclass is indented under the class definition.
Apparatus in which a portion of either the cylinder or the
working member peripheral working chamber surface comprises
either a nonmetallic resilient segment or a resiliently
biased segment to cushion either relatively moving parts of
the device at a cyclically occurring, direction changing
movement of a part thereof or to temporarily accommodate or
relieve a working fluid condition tending to exceed the
capacity of the working chamber.
Subclass:
158
This subclass is indented under the class definition.
Apparatus in which a vane or an abutment is urged to move at
least in one direction by a magnetic field.
Subclass:
159
This subclass is indented under the class definition.
Apparatus in which the cylinder includes a normally
stationary working chamber surface portion or part that is
selectively movable and when moved, an edge portion thereof
adjacent either the working fluid inlet or outlet
controllably modifies working fluid flow therepast.
Subclass:
160
This subclass is indented under the class definition.
Apparatus wherein the working chamber comprises an outer
movable member surrounding a member of substantially like
axial dimension, adjacent spaced surfaces of which form the
working chamber; a boundary thereof against which working
fluid reacts being formed by the convergence of the adjacent
surfaces whereby line contact therebetween is substantially
maintained and at least one of the members being a working
member.
Subclass:
161
This subclass is indented under subclass 160. Apparatus in
which the outer cylinder member revolves about its axis.
Subclass:
162
This subclass is indented under subclass 161. Apparatus in
which there is provided a barrier member for separating the
inlet from the outlet having surface portions forming part of
the working chamber surface, the barrier member moving or
having relative movement with a working chamber surface in a
direction along or parallel to the axis of rotation of the
working member incident to the expansion and contraction of
the working member.
Subclass:
163
This subclass is indented under subclass 162. Apparatus
wherein the inner member forming part of the working chamber
surface rotates about an axis that is at an angle to the axis
of rotation of the cylinder.
Subclass:
164
This subclass is indented under subclass 161. Apparatus
wherein the inner member forming part of the working chamber
is continuously rotatable about a fixed or movable axis.
Subclass:
165
This subclass is indented under subclass 164. Apparatus in
which two or more rotating members each rotating about a
separate axis are encompassed by the cylinder.
Subclass:
166
This subclass is indented under subclass 164. Apparatus
wherein the rotating outer and inner members have matched
projecting and recessed surface portions of substantially
like dimension which interfit during at least a portion of
their rotative movement.
Subclass:
167
This subclass is indented under subclass 166. Apparatus in
which the internal reacting member is provided with an
opening through which working fluid enters or leaves the
working chamber.
Subclass:
168
This subclass is indented under subclass 166. Apparatus in
which the recessed portion of the cylinder comprises a
through passage.
Subclass:
169
This subclass is indented under subclass 168. Apparatus
provided with a partition separating the cylinder and
reacting member during a portion of their rotative movement,
said partition generally being in the shape of a crescent.
Subclass:
170
This subclass is indented under subclass 166. Apparatus
provided with a partition separating the cylinder and
reacting member during a portion of their rotative movement,
said partition generally being in the shape of a crescent.
Subclass:
171
This subclass is indented under subclass 166. Apparatus in
which rotary internal reacting member is provided with five
or more projecting portions.
Subclass:
172
This subclass is indented under subclass 164. Apparatus
wherein either the outer rotating cylinder or the member
forming the inner surface is provided with a movable divider
member (e.g., vane or abutment) having a wall or portion
thereof forming part of the expansible working chamber.
Subclass:
173
This subclass is indented under subclass 172. Apparatus
wherein the member forming the inner surface includes a
relatively movable member that slides back and forth therein
in a direction that is generally radial thereof, said
relatively movable member also cooperating with the rotating
cylinder to form the working chamber.
Subclass:
174
This subclass is indented under subclass 172. Apparatus
wherein the rotating cylinder includes a relatively movable
member that slides back and forth therein in a direction that
is generally radial thereof, said relatively movable member
also cooperating with the inner rotating surface to form the
working chamber.
Subclass:
175
This subclass is indented under subclass 161. Apparatus
wherein the member forming the inner surface acting as an
abutment against which the motive fluid reacts is stationary
and is formed with an additional relatively movable member
that moves back and forth in relation thereto, said
relatively movable member also cooperating with the outer
fluid actuated surface to form the working chamber.
Subclass:
176
This subclass is indented under subclass 161. Apparatus
wherein the rotating cylinder includes a relatively movable
member that is pivoted thereon to oscillate back and forth in
relation to said cylinder, said relatively movable member
also cooperating with the radially spaced inner surface to
form the working chamber.
Subclass:
177
This subclass is indented under subclass 161. Apparatus
wherein the rotating cylinder includes a relatively movable
member that slides back and forth therein in a direction
transversely of said cylinder, said relatively movable member
also cooperating with the radially spaced inner surface to
form the working chamber.
Subclass:
178
This subclass is indented under the class definition.
Apparatus in which a part having a surface portion comprising
a portion of the working chamber is provided at least in part
with either (1) a coating of a material other than that
making up the remainder of the part intimately forming an
impartible part thereof or (2) is made of a single material
which has been treated to provide the working chamber surface
portion with specific properties which properties are
different from the properties of the remainder of the part.
Subclass:
179
This subclass is indented under the class definition.
Apparatus relating to the particular metal or alloy or the
properties of either of which the device is made.
(1) Note. The mere recitation of iron or steel, per se, is
excluded as being too common, however, specifying iron and
steel or different types of iron and steel would be
included.
SEE OR SEARCH THIS CLASS, SUBCLASS:
152 and the subclasses indented thereunder for such devices
having a nonmetallic material forming part of the working
chamber.
156 for such devices in which a resilient metallic material
is utilized to form a working chamber surface portion.
178 for a working chamber plated wear surface.
SEE OR SEARCH CLASS:
428, Stock Material or Miscellaneous Articles, subclasses
544+ for metallic stock material or intermediate articles
from which parts for a rotary expansible chamber device can
be made.
Subclass:
180
This subclass is indented under the class definition.
Apparatus in which a passage having an orifice conducts
working fluid to or from a working chamber portion separate
from and having a working fluid pressure intermediate the
inlet and outlet pressures of the working chamber, inlet or
outlet pressure communicating with the intermediate pressure
zone via the passage.
SEE OR SEARCH THIS CLASS, SUBCLASS:
74 for similar devices wherein the pressurized fluid also
radially balances the working member.
Subclass:
181
This subclass is indented under the class definition.
Apparatus claimed in combination with features other than
drive means, valving or support structure and not provided
for in preceding subclasses.
SEE OR SEARCH CLASS:
417, Pumps, subclass 321 and the subclasses indented
thereunder for the combination of a motor driving pump.
Subclass:
182
This subclass is indented under the class definition.
Apparatus in which there is provided a loose or compensation
drive connection either between the working member and its
drive shaft or between adjacent shaft end portions in the
vicinity of the working member to allow for slight or
temporary axial misalignment therebetween.
Subclass:
183
This subclass is indented under the class definition.
Apparatus in which the working member is provided with a
fluid passage means through which working fluid passes
enroute to or from the working chamber.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 189+ for devices in which residual trapped
working fluid may escape by way of a passage means in the
rotating working member.
Subclass:
184
This subclass is indented under subclass 183. Apparatus in
which the working fluid passage means provided in the working
member comprises the slot in which a vane moves incident to
the expansion and contraction of the working chamber.
Subclass:
185
This subclass is indented under subclass 183. Apparatus in
which the fluid passage means is provided with a movable flow
restrictive means for controlling the flow of working fluid
to or from the working chamber.
SEE OR SEARCH THIS CLASS, SUBCLASS:
42 for a speed controlled flow restrictive means positioned
on or within an inner rotating member to control working
fluid flow.
Subclass:
186
This subclass is indented under subclass 183. Apparatus in
which the working member is provided with passage means
through which working fluid passes enroute to and from the
working chamber.
Subclass:
187
This subclass is indented under subclass 186. Apparatus
wherein the passage means includes at least one working fluid
passage passing through or including the working member axis
of rotation.
Subclass:
188
This subclass is indented under subclass 183. Apparatus
wherein the passage means includes at least one working fluid
passage passing through or including the working member axis
of rotation.
Subclass:
189
This subclass is indented under the class definition.
Apparatus in which the rotating working member either engages
another rotating member or a cylinder casing or part thereof
thereby barring the passage of working fluid therepast and a
relief passage is provided at the convergence of these
elements for the removal of the unexhausted residual working
fluid normally confined thereat in the operation of the
device.
SEE OR SEARCH THIS CLASS, SUBCLASS:
183 and the subclasses thereunder for devices in which the
working fluid enroute to or from the working chamber passes
through at least a portion of the rotating working member.
Subclass:
190
This subclass is indented under subclass 189. Apparatus
wherein at least one of the rotating members has peripheral
lobed portions altered to allow for the escape of fluid when
in meshing relationship with the other rotating member.
Subclass:
191
This subclass is indented under the class definition.
Apparatus in which a plurality of members rotating about
fixed or substantially fixed axes have surface portions
disposed to maintain or substantially maintain line contact
therebetween against which pressure fluid reacts to thereby
form a boundary of the working chamber; at least one of the
rotating members being a working member.
(1) Note. Included herein are rotating members rotating
about spaced axes, each having portions thereof sweeping a
separate one of intersecting channels which have radially
inward and outward stationary working chamber surface, the
chambers intersecting at a common line of tangency whereat
each rotating member may act as an abutment for the other as
the members rotate.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 125+ for a roller means incidentally forming a
part of the working chamber and functioning merely to perfect
the seal relationship between the working member and the
cylinder at the convergence of their surfaces whereby a
boundary of the working chamber is formed thereby.
subclasses 189+ for rotary expansible chamber devices of
the interengaging rotary members type in which provision is
made for relieving trapped fluid.
SEE OR SEARCH CLASS:
73, Measuring and Testing, subclass 261, for expansible
chamber rotary piston meters having interengaging pistons and
see the search notes thereunder.
Subclass:
192
This subclass is indented under subclass 191. Apparatus in
which in addition to the interengaging rotating members there
is provided a relatively movable partition element having
engagement with either (1) both rotating members or (2) with
one of the rotating members and the cylinder, the partition
element thereby forming a wall of the working chamber and
moving incident to the expansion and contraction of the
working chamber.
Subclass:
193
This subclass is indented under subclass 192. Apparatus
wherein the displaceable partition element is moved in a
direction along or parallel to the axis of rotation of the
working member of which it is a part.
Subclass:
194
This subclass is indented under subclass 101. Apparatus in
which each of the coacting rotating members comprises an
elongate circumferential surface complementary to the other
and progressively enlarged or reduced from end to end
thereof.
Subclass:
195
This subclass is indented under subclass 191. Apparatus in
which the axes of a working member and at least one other
coacting rotating member are not parallel.
Subclass:
196
This subclass is indented under subclass 191. Apparatus
having three or more rotating members at least one of which
has a peripheral surface engaging the peripheral surface of
two or more other rotating members.
Subclass:
197
This subclass is indented under subclass 196. Apparatus in
which the peripheral surfaces of the interengaging rotary
members are formed with intermeshing teeth or ribs and
grooves either in the form of a helix or discontinuous,
angularly related, straight line segments (i.e., herringbone
shape).
Subclass:
198
This subclass is indented under subclass 191. Apparatus in
which at least one of the rotating members partakes of a step
by step rotary movement.
SEE OR SEARCH CLASS:
74, Machine Element or Mechanism, appropriate subclasses, for
mechanical movements providing for step by step rotation.
Subclass:
199
This subclass is indented under subclass 191. Apparatus
comprising two or more spaced apart sets or groups of
interengaging rotary members each set or group being, per se,
capable of performing a pump or motor operation.
Subclass:
200
This subclass is indented under subclass 199. Apparatus
including a plurality of sets of interengaging rotating
members which are longitudinally spaced and at least one
rotating member of each set rotating on a common axis.
Subclass:
201.1
Helical or herringbone:
This subclass is indented under subclass 191. Apparatus
wherein the surface portions of the interengaging rotary
member are formed with intermeshing teeth or ribs and
grooves, the teeth or ribs and grooves being in the form of a
helix or discontinuous, angularly related, straight line
segment (i.e., herringbone shape).
Subclass:
201.2
With valve:
This subclass is indented under subclass 201.1. Apparatus
wherein there is provided a means to regulate fluid flow.
Subclass:
201.3
Having specific tooth shape:
This subclass is indented under subclass 201.1. Apparatus
wherein the teeth or ribs and grooves have an explicitly set
forth form.
Subclass:
202
This subclass is indented under subclass 201.1. Apparatus in
which each rotating member includes axially spaced ribs or
grooves extending thereabout in reverse directions.
Subclass:
203
This subclass is indented under subclass 201.1. Apparatus in
which the device is provided with a means for applying an
axial force to at least one of the members in opposition to
an axial force produced by the member in the operation of the
device.
(1) Note. It is not considered that thrust bearings or the
like are force applying means for classification here. Such
devices have been classified on other features.
Subclass:
204
This subclass is indented under subclass 191. Apparatus in
which at least one rotating member has a substantially
circular periphery and is affixed to its shaft to rotate
therewith on an axis other than its central or symmetrical
axis.
Subclass:
205
This subclass is indented under subclass 191. Apparatus in
which each of the interengaging rotary members has the same
dimensions and configurations.
Subclass:
206.1
Having each radial protuberance of like dimension:
This subclass is indented under subclass 205. Apparatus in
which each tooth or toothlike projection of the interengaging
rotary members has the same dimensions and configurations.
(1) Note. Teeth or projections having the same dimensions
and configurations except that they are mirror images of each
other are considered proper subject matter for inclusion
here.
Subclass:
206.2
With timing gear adjustment or arrangement:
This subclass is indented under subclass 206.1. Apparatus in
which a means to coordinate the rotation of the interengaging
members can be realigned or has a particular configuration.
Subclass:
206.3
With heating or cooling:
This subclass is indented under subclass 206.1. Apparatus
comprising means to vary the temperature of the apparatus.
Subclass:
206.4
Having specific inlet or outlet port shape:
This subclass is indented under subclass 206.1. Apparatus in
which the entrance or exit to a chamber has a particular
configuration.
Subclass:
206.5
Having specific rotor or tooth shape:
This subclass is indented under subclass 206.1. Apparatus in
which the interengaging members have an explicitly set forth
form.
Subclass:
206.6
With sealing means:
This subclass is indented under subclass 206.1. Apparatus
comprising means to prevent leaking of the working fluid.
Subclass:
206.7
With bearings:
This subclass is indented under subclass 206.1. Apparatus
comprising means to support, guide, and reduce the friction
between moving parts.
Subclass:
206.8
With lubrication:
This subclass is indented under subclass 206.1. Apparatus
comprising a means for supplying a substance between moving
parts that reduces friction.
Subclass:
206.9
Using specific material:
This subclass is indented under subclass 206.1. Apparatus
wherein the chamber or the rotary interengaging members are
composed of a particular substance.
Subclass:
207
This subclass is indented under the class definition.
Apparatus in which there is provided a plurality of circular
paths or chambers each of which has movable member therein
having movement relative thereto and relative to each other,
the circular paths or chambers include a portion common to
each and the working chamber being formed in part by a
surface of one of the movable members and an end surface or
face of another movable member as the movable members
alternately move across the common path, or chamber portion.
Subclass:
208
This subclass is indented under the class definition.
Apparatus in which there is provided a movable partition
element having end portions in touching relationship with the
peripheries of a plurality of spaced parallel working members
thereby form a boundary of the working chamber or chambers
against which working fluid react.
Subclass:
209
This subclass is indented under the class definition.
Apparatus comprising two or more working chambers, each
chamber being adapted to receive either a separate rotating
working member or a separate working face or wall of a
rotating member common to each working chamber.
Subclass:
210
This subclass is indented under subclass 209. Apparatus
having a plurality of spaced members rotating about the same
or different axis, at least one of the members being spaced
in the direction of or along the rotational axis of another
one of the rotating members.
Subclass:
211
This subclass is indented under subclass 210. Apparatus
provided with either a vane or an abutment movable in a
direction along or parallel to the axis of rotation of the
rotating members and movable incident to the expansion and
contraction of the respective working chambers or working
chamber portions.
Subclass:
212
This subclass is indented under subclass 210. Apparatus in
which a divider element is interposed between adjacent sides
of the rotating members for engagement or substantial
engagement therewith.
Subclass:
213
This subclass is indented under subclass 212. Apparatus in
which there is provided three or more rotating members and a
separate divider element is interposed between adjacent ends
of adjacent rotating member pairs.
Subclass:
214
This subclass is indented under subclass 212. Apparatus in
which there is provided at least one partition or abutment
member for each of the spaced working members against which
working fluid reacts and means is provided to engage a
partition member of one working member with a partition
member of another working member so that a movement of one of
the partition members causes a concurrent movement of the
other partition member.
Subclass:
215
This subclass is indented under subclass 209. Apparatus
wherein the chambers are axially spaced.
Subclass:
216
This subclass is indented under subclass 215. Apparatus in
which there is provided in each working chamber a working
member or a working portion thereof in the form of a helix,
the helix extending along or generally parallel to the
working member axis of rotation.
(1) Note. Devices in which a working chamber is partitioned
by a member in the form of a helix so that a working chamber
is formed on each side thereof are considered proper for
classification here.
Subclass:
217
This subclass is indented under subclass 215. Apparatus in
which either an abutment or a vane is movable along or
parallel to the axis of rotation of the working member.
Subclass:
218
This subclass is indented under subclass 217. Apparatus in
which the moving vane or abutment is mounted to move incident
to the expansion and contraction of the working chamber about
an axis other than either (1) the axis of rotation of the
working member or (2) an axis parallel thereto.
Subclass:
219
This subclass is indented under subclass 217. Apparatus
provided with a vane that is movable in a direction along or
parallel to the axis of rotation of the rotating members.
Subclass:
220
This subclass is indented under the class definition.
Apparatus in which the working member is provided with a
continuous circumferential working portion in the form of a
helix extending from one end to the other end thereof.
Subclass:
221
This subclass is indented under the class definition.
Apparatus in which there is provided a displaceable abutment
and a displaceable vane, each of which moves incident to the
expansion and contraction of the working chamber.
Subclass:
222
This subclass is indented under the class definition.
Apparatus in which an abutment comprises a plurality of
relatively movable elements or portions which part to allow a
working portion of the working member to pass therebetween.
Subclass:
223
This subclass is indented under the class definition.
Apparatus having a vane or abutment which moves incident to
the expansion and contraction of the expansion chamber, said
vane or abutment having primary means and separate and
distinct supplemental means to move the vane or abutment.
(1) Note. Neither centrifugal force nor the weight of a
vane or abutment is considered to be either a primary or a
supplementary moving means.
(2) Note. The supplementary moving means may concurrently
with the primary moving means move the vane or abutment or it
may move idly in its prescribed path of movement in lagging
relationship with the primary moving means to move the vane
or abutment only when the primary moving means fails.
Subclass:
224
This subclass is indented under the class definition.
Apparatus in which there is provided a valve means mounted on
a working fluid partition element of the device.
Subclass:
225
This subclass is indented under the class definition.
Apparatus in which either an abutment or a vane comprises or
includes a rotatable antifriction member to engage the
working member or the cylinder respectively.
Subclass:
226
This subclass is indented under subclass 225. Apparatus in
which the vane or abutment has rotation about an axis either
other than the working member axis of rotation or an axis
parallel thereto.
SEE OR SEARCH THIS CLASS, SUBCLASS:
195 for interengaging rotating members having nonparallel
axis of rotation.
198 for interengaging rotary members wherein at least one of
the rotary members is intermittently rotated.
Subclass:
227
This subclass is indented under subclass 225. Apparatus
wherein the abutment or vane is mounted for rotation on the
cylinder or working member respectively and is urged to have
relative rotation with the element (cylinder or working
member) to which it is mounted by means other than the
surface of the other element.
Subclass:
228
This subclass is indented under the class definition.
Apparatus in which a vane or abutment moves or has a
component of movement in a direction along or parallel to the
axis of rotation of the working member incident to the
expansion and contraction of the working chamber.
Subclass:
229
This subclass is indented under subclass 228. Apparatus
wherein the vane or abutment has to-and-fro straight line
movement along or parallel to the working member axis of
rotation.
Subclass:
230
This subclass is indented under subclass 229. Apparatus in
which the vane or abutment is positively moved in at least
one direction by means other than the cylinder or working
member surface respectively or another vane or abutment and
is moved incident to the expansion and contraction of the
working chamber.
Subclass:
231
This subclass is indented under subclass 230. Apparatus in
which the vane or abutment is positively moved in both
directions.
Subclass:
232
This subclass is indented under subclass 231. Apparatus in
which the axially sliding vane or abutment is urged to move
in one of the directions by either a resilient mechanical
means or a nonsolid pressurized substance.
Subclass:
233
This subclass is indented under subclass 228. Apparatus
comprising a movable vane which has oscillatory movement
about an axis normal to and intersecting the working member
rotational axis.
Subclass:
234
This subclass is indented under the class definition.
Apparatus comprising a vane or abutment which has (1)
nonparallel or (2) semi-circular surface portions to engage
adjacent surface portions of a vane or abutment slot
respectively, in which it moves incident to the expansion and
contraction of the working chamber.
Subclass:
235
This subclass is indented under the class definition.
Apparatus in which the rotary expansible chamber device is of
the sliding vane type and included in the vane slot thereof
for engagement with the vane is either an insert of suitable
material to absorb wear or a rolling means for the prevention
of wear.
SEE OR SEARCH THIS CLASS, SUBCLASS:
104 for a biased insert providing a seal means between the
vane and the vane slot.
241 for oscillating bearings mounted in walls of the working
member through which vanes slide.
Subclass:
236
This subclass is indented under the class definition.
Apparatus in which there is provided either a movable vane or
abutment that slides relative to the working member or
cylinder respectively in a direction generally toward or away
from the axis of rotation and other than in a radial plane
containing the axis of rotation of the working member.
(1) Note. A sliding vane or abutment is considered to slide
radially when a plane thereof including or parallel to the
plane of a side face thereof is coincident with a radial
plane of the working member. Where the sliding vane or
abutment has nonparallel sides, it is considered to slide
radially if the median plane thereof is coincident with the
radial plane of the working member.
Subclass:
237
This subclass is indented under subclass 236. Apparatus
wherein the sliding vane or abutment moves in an arcuate
path.
Subclass:
238
This subclass is indented under subclass 236. Apparatus in
which the vane or abutment is urged to move at least in one
direction in the operation of the device by means other than
the surface of the cylinder or working member respectively,
another vane or abutment or the weight of the vane or
abutment and is moved incident to the expansion and
contraction of the working chamber.
Subclass:
239
This subclass is indented under the class definition.
Apparatus in which there is provided a plurality of
partitioning members or partitioning member portions in which
either (1) at least one of the partitioning members remains
in a nonworking position while at least one other
partitioning member performs work when the working member is
rotating in one direction and vice versa or (2) a
partitioning member having portions alternately movable to
either one of two positions to perform work whereby the
direction of working member rotation may be reversed.
Subclass:
240
This subclass is indented under the class definition.
Apparatus in which the cylinder is provided with a plurality
of moving abutments thereon, one of said abutments being
connected to at least one other abutment to move concurrently
therewith.
Subclass:
241
Apparatus under the class in which either a generally
radially sliding vane or abutment is mounted respectively to
the working member or to the cylinder to have simultaneous
oscillating movement in the direction of rotation of the
working member.
SEE OR SEARCH THIS CLASS, SUBCLASS:
138 for similar devices in which there is an oscillating
seal element between the vane and working member.
Subclass:
242
This subclass is indented under the class definition.
Apparatus provided with an abutment having spaced working
member periphery engaging end portions rockable about an axis
and in the plane of rotation of the working member, the
abutment being moved in each direction by the abutment end
portions incident to the expansion and contraction of the
working chamber.
Subclass:
243
Apparatus under the class having a moving abutment which is
urged to move in at least one direction by means other than
the working member surface, weight of the abutment or another
abutment and is moved incident to the expansion and
contraction of the working member.
Subclass:
244
This subclass is indented under subclass 243. Apparatus
wherein the abutment is moved in at least one direction by
coacting elements one of which has a surface or groove of
irregular contour for controlling the movement of another
element and the abutment associated therewith.
(1) Note. A mere eccentric, i.e., a circular surface
rotating about an offset axis is not a cam under this
definition. See subclass 247 for an abutment that is
actuated by an eccentric.
Subclass:
245
This subclass is indented under subclass 244. Apparatus
wherein the abutment is moved in each direction by the
coacting elements.
Subclass:
246
This subclass is indented under subclass 244. Apparatus in
which either a resilient mechanical device or a nonsolid
pressurized substance sequentially urges the abutment to
return to an initial position whereupon the abutment may
again be moved by the irregularly contoured groove or
surface.
Subclass:
247
This subclass is indented under subclass 243. Apparatus in
which the abutment is urged to move in each direction.
Subclass:
248
This subclass is indented under subclass 243. Apparatus in
which the abutment is urged into engagement with the working
member by a resilient mechanical means.
Subclass:
249
This subclass is indented under subclass 243. Apparatus
wherein fluid under pressure exerts a force upon the abutment
to move it into engagement with the working member.
Subclass:
250
This subclass is indented under subclass 249. Apparatus
wherein the abutment is provided with working member
abuttable portions extending from a common pivot and
oscillating in a common plane and each abuttable portion
being adapted to engage the working member whereby the
working member may be rotated in either direction.
Subclass:
251
This subclass is indented under subclass 249. Apparatus in
which the abutment is provided with a fluid passage means
through which working fluid passes enroute to or from the
working chamber.
Subclass:
252
This subclass is indented under the class definition.
Apparatus in which the working member is provided with a vane
and the cylinder encasing the working member is provided with
either a normally closed port means through which the vane or
a portion thereof may be replaced, the replacement of the
vane being performed without dismantling the device.
Subclass:
253
This subclass is indented under the class definition.
Apparatus in which the working member is provided with a
plurality of vanes thereon, one of said vanes being connected
to at least one other vane to move concurrently therewith.
(1) Note. Each vane may be an end portion of a common
blade-like member.
(2) Note. An element other than the working member, shaft
or cylinder interposed between or encompassing a plurality of
vanes or abutments and having an abutting or restraining
relationship with adjacent ends of two or more vanes or
abutments whereby to maintain the vanes in a desired spatial
relationship is considered to connect the vanes or abutments
and proper for classification here.
Subclass:
254
This subclass is indented under subclass 253. Apparatus in
which two or more vanes are rigidly connected to each other
for simultaneous movement.
Subclass:
255
This subclass is indented under subclass 254. Apparatus in
which each of two vanes lies in a common plane passing
substantially through the center of the working member.
Subclass:
256
This subclass is indented under subclass 253. Apparatus in
which a plurality of radially movable vanes have their
divergent end portions engageable by a movable element
encircling the same to control outward movement of the vanes
whereby to simultaneously maintain either a desired clearance
or close fitting engagement of the blades with the cylinder
wall surface.
Subclass:
257
This subclass is indented under subclass 253. Apparatus
wherein an element is provided to engage adjacent inner ends
of a plurality of vanes to simultaneously urge and maintain
the vanes in cylinder wall engagement.
Subclass:
258
This subclass is indented under subclass 257. Apparatus
wherein the interposed member is a resilient mechanical
device.
Subclass:
259
This subclass is indented under the class definition.
Apparatus in which a working member is provided with a vane
moved in at least one direction by means other than the
weight of the vane, centrifugal force or the cylinder wall
surface and moving incident to the expansion and contraction
of the working chamber.
Subclass:
260
This subclass is indented under subclass 259. Apparatus in
which the vane is moved in at least one direction by coacting
elements one of which has a surface or groove of irregular
contour for controlling the movements of the other element
and the vane associated therewith.
(1) Note. A circular surface is not considered to have an
irregular contour and is not a cam under this definition.
Subclass:
261
This subclass is indented under subclass 260. Apparatus in
which the vane is positively moved in each direction.
(1) Note. The vane movement in the opposite direction may
be performed by the cam or by other positive vane moving
means.
Subclass:
262
This subclass is indented under subclass 261. Apparatus in
which the other element of the coacting elements comprises or
includes a pivoted link member intermediate the first
mentioned element and the vane.
Subclass:
263
This subclass is indented under subclass 261. Apparatus in
which either a resilient mechanical means or a nonsolid
pressurized substance urges the vane in the other direction.
Subclass:
264
This subclass is indented under subclass 261. Apparatus
wherein the other element is provided with a rotatable
antifriction means to engage the surface or groove of
irregular contour.
Subclass:
265
This subclass is indented under subclass 259. Apparatus in
which the vane is moved in both directions.
Subclass:
266
This subclass is indented under subclass 259. Apparatus
wherein the vane is positively urged in one direction,
usually into engagement with the cylinder wall surface, by a
resilient mechanical means.
Subclass:
267
This subclass is indented under subclass 266. Apparatus
wherein fluid under pressure assists the resilient mechanical
means to urge the vane into cylinder wall engagement.
Subclass:
268
This subclass is indented under subclass 259. Apparatus
wherein the vane is urged into engagement with the cylinder
wall surface by pressure fluid.
(1) Note. A vane having a lateral lip or flange portion at
its cylinder surface contacting end which is acted upon by
fluid pressure to maintain a vane in sealing engagement with
the cylinder wall surface is not considered to be fluid urged
and classification is based on other features.
Subclass:
269
This subclass is indented under subclass 268. Apparatus in
which a plurality of vanes have their opposed inner surfaces
continuously subject to fluid pressure in a zone of fluid
pressure common to each to maintain the vanes in cylinder
wall engagement.
Subclass:
270
This subclass is indented under the class definition. Subject
matter not otherwise provided for.
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