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CPC
COOPERATIVE PATENT CLASSIFICATION
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ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES (internal-combustion aspects F02B 53/00, F02B 55/00)
NOTE
-
This subclass covers:
- rotary-piston or oscillating-piston engines for elastic fluids, e.g. steam;
- rotary-piston or oscillating-piston engines for liquids and elastic fluids:
- rotary-piston or oscillating-piston machines for elastic fluids;
- rotary-piston or oscillating-piston machines for liquids and elastic fluids.

In this subclass, the following expression is used with the meaning indicated:
- "rotary-piston machine" includes the German expressions "Drehkolbenmaschinen",
"Kreiskolbenmaschinen" and "Umlaufkolbenmaschinen".

Attention is drawn to the Notes preceding class F01, especially as regards the definitions of "rotary-piston machine", "oscillating-piston machine", "rotary piston", "co-operating members", "movement of co-operating members", "teeth or tooth-equivalents" and "internal-axis".

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Rotary-piston machines or engines (with axes of co-operating members non parallel F01C 3/00; with the working-chamber walls at least partly resiliently deformable F01C 5/00; with fluid ring or the like F01C 7/00; rotary-piston machines or engines in which the working fluid is exclusively displaced by, or exclusively displaces, one or more reciprocating pistons F01B 13/00)
NOTE
-
Group F01C 1/30 takes precedence over groups F01C 1/02 to F01C 1/28.

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F01C 1/02
.
of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
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F01C 1/0207
. .
{
both members having co-operating elements in spiral form
}
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F01C 1/0215
. . .
{
where only one member is moving
}
F01C 1/0223
. . . .
{
with symmetrical double wraps
}
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F01C 1/023
. . .
{
where both members are moving
}
F01C 1/0238
. . . .
{
with symmetrical double wraps
}
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F01C 1/0246
. . .
{
Details concerning the involute wraps or their base, e.g. geometry
}
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F01C 1/0253
. . . .
{
Details concerning the base
}
F01C 1/0261
. . . . .
{
Details of the ports, e.g. location, number, geometry
}
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F01C 1/0269
. . . .
{
Details concerning the involute wraps
}
F01C 1/0276
. . . . .
{
Different wall heights
}
F01C 1/0284
. . . . .
{
Details of the wrap tips
}
F01C 1/0292
. . . . .
{
Ports or channels located in the wrap
}
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F01C 1/04
. .
of internal-axis type
F01C 1/045
. . .
{
having a C-shaped piston
}
F01C 1/06
. .
of other than internal-axis type(F01C 1/063 takes precedence)
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F01C 1/063
. .
with coaxially-mounted members having continuously-changing circumferential spacing between them
F01C 1/067
. . .
having cam-and-follower type drive
F01C 1/07
. . .
having crankshaft-and-connecting-rod type drive
F01C 1/073
. . .
having pawl-and-ratchet type drive
F01C 1/077
. . .
having toothed-gearing type drive
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.
of intermeshing engagement type, i.e. with engagement of co- operating members similar to that of toothed gearing
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F01C 1/082
. .
{
Details specially related to intermeshing engagement type machines or engines
}
F01C 1/084
. . .
{
Toothed wheels
}
. . .
{
Carter
}
F01C 1/088
. . .
{
Elements in the toothed wheels or the carter for relieving the pressure of fluid imprisoned in the zones of engagement
}
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F01C 1/10
. .
of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
F01C 1/101
. . .
{
Moineau-type
}
F01C 1/102
. . .
{
with a crescent shaped filler element located between the intermeshing elements
}
F01C 1/103
. . .
{
the two members rotating simultaneously around their respective axes
}
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F01C 1/104
. . .
{
one member having simultaneously a rotational movement about its own axis and an orbital movement
}
F01C 1/105
. . . .
{
and having an articulated driving shaft
}
F01C 1/107
. . .
with helical teeth
F01C 1/113
. . .
the inner member carrying rollers intermeshing with the outer member
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F01C 1/12
. .
of other than internal-axis type
F01C 1/123
. . .
{
with tooth-like elements, extending generally radially from the rotor body cooperating with recesses in the other rotor, e.g. one tooth
}
F01C 1/126
. . .
{
with elements extending radially from the rotor body not necessarily cooperating with corresponding recesses in the other rotor, e.g. lobes, Roots type
}
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F01C 1/14
. . .
with toothed rotary pistons
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F01C 1/16
. . . .
with helical teeth, e.g. chevron-shaped, screw type
{
(for non-parallel axes of movement F01C 3/00)
}
F01C 1/165
. . . . .
{
having more than two rotary pistons with parallel axes
}
F01C 1/18
. . . .
with similar tooth forms (F01C 1/16 takes precedence)
F01C 1/20
. . . .
with dissimilar tooth forms (F01C 1/16 takes precedence)
F01C 1/22
.
of internal-axis type with equidirectional movement of co-operating members at the point of engagement, or with one of the co-operating members being stationary, the inner member having more teeth or tooth- equivalents than the outer member
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F01C 1/24
.
of counter-engagement type, i.e. the movement of co-operating members at the points of engagement being in opposite directions
F01C 1/26
. .
of internal-axis type
F01C 1/28
. .
of other than internal-axis type
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F01C 1/30
.
having the characteristics covered by two or more groups F01C 1/02, F01C 1/08, F01C 1/22, F01C 1/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
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F01C 1/32
. .
having both the movement defined in group F01C 1/02 and relative reciprocation between the co-operating members
F01C 1/321
. . .
{
with vanes hinged to the inner member and reciprocating with respect to the inner member
}
F01C 1/322
. . .
{
with vanes hinged to the outer member and reciprocating with respect to the outer member
}
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F01C 1/324
. . .
with vanes hinged to the inner member and reciprocating with respect to the outer member
F01C 1/328
. . . .
and hinged to the outer member
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F01C 1/332
. . .
with vanes hinged to the outer member and reciprocating with respect to the inner member
F01C 1/336
. . . .
and hinged to the inner member
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F01C 1/34
. .
having the movement defined in group F01C 1/08 or F01C 1/22 and relative reciprocation between the co-operating members
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F01C 1/344
. . .
with vanes reciprocating with respect to the inner member
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F01C 1/3441
. . . .
{
the inner and outer member being in contact along one line or continuous surface substantially parallel to the axis of rotation
}
F01C 1/3442
. . . . .
{
the surfaces of the inner and outer member, forming the working space, being surfaces of revolution
}
F01C 1/3443
. . . . .
{
with a separation element located between the inlet and outlet opening
}
F01C 1/3445
. . . . .
{
the vanes having the form of rollers, slippers or the like
}
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F01C 1/3446
. . . .
{
the inner and outer member being in contact along more than one line or surface
}
F01C 1/3447
. . . . .
{
the vanes having the form of rollers, slippers or the like
}
F01C 1/3448
. . . .
{
with axially movable vanes
}
F01C 1/348
. . . .
the vanes positively engaging, with circumferential play, an outer rotatable member
F01C 1/352
. . . .
the vanes being pivoted on the axis of the outer member
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F01C 1/356
. . .
with vanes reciprocating with respect to the outer member
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F01C 1/3562
. . . .
{
the inner and outer member being in contact along one line or continuous surface substantially parallel to the axis of rotation
}
F01C 1/3564
. . . . .
{
the surfaces of the inner and outer member, forming the working space, being surfaces of revolution
}
F01C 1/3566
. . . .
{
the inner and outer member being in contact along more than one line or surface
}
F01C 1/3568
. . . .
{
with axially movable vanes
}
F01C 1/36
. .
having both the movements defined in sub-groups F01C 1/22 and F01C 1/24
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F01C 1/38
. .
having the movement defined in group F01C 1/02 and having a hinged member (F01C 1/32 takes precedence)
F01C 1/39
. . .
with vanes hinged to the inner as well as to the outer member
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F01C 1/40
. .
having the movement defined in group F01C 1/08 or F01C 1/22 and having a hinged member
F01C 1/44
. . .
with vanes hinged to the inner member
F01C 1/46
. . .
with vanes hinged to the outer member
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Rotary-piston machines or engines with non-parallel axes of movement of co-operating members (with the working-chamber walls being at least partly resiliently deformable F01C 5/00)
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F01C 3/02
.
the axes being arranged at an angle of 90 degrees
F01C 3/025
. .
{
of intermeshing engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
}
F01C 3/04
. .
with axially sliding vanes
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F01C 3/06
.
the axes being arranged otherwise than at an angle of 90 degrees
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F01C 3/08
. .
of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
F01C 3/085
. . .
{
the axes of cooperating members being on the same plane
}
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Rotary-piston machines or engines with the working-chamber walls at least partly resiliently deformable
F01C 5/02
.
the resiliently-deformable wall being part of the inner member, e.g. of a rotary piston
F01C 5/04
.
the resiliently-deformable wall being part of the outer member, e.g. of a housing
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F01C 5/06
.
the resiliently-deformable wall being a separate member
F01C 5/08
. .
of tubular form, e.g. hose
Rotary-piston machines or engines with fluid ring or the like
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Oscillating-piston machines or engines
F01C 9/002
.
{
the piston oscillating around a fixed axis
}
.
{
the piston oscillating in the space, e.g. around a fixed point (rotary piston machines or engines with non-parallel axes of rotation between co-operating members F01C 3/00)
}
F01C 9/007
.
{
the points of the moving element describing approximately an alternating movement in axial direction with respect to the other element
}
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Combinations of two or more machines or engines, each being of rotary-piston or oscillating-piston type (F01C 13/00 takes precedence; combinations of two or more pumps F04; fluid gearing F16H)
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F01C 11/002
.
{
of similar working principle
}
F01C 11/004
. .
{
and of complementary function, e.g. internal combustion engine with supercharger
}
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F01C 11/006
.
{
of dissimilar working principle
}
F01C 11/008
. .
{
and of complementary function, e.g. internal combustion engine with supercharger
}
NOTE
-
Multi-stage steam engines or similar machines are not considered as having complementary function

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Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby (aspects predominantly concerning driven devices, see the relevant classes for these devices)
F01C 13/02
.
for driving hand-held tools or the like
F01C 13/04
.
for driving pumps or compressors
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Arrangements for drive of co-operating members, e.g. for rotary piston and casing
F01C 17/02
.
of toothed-gearing type (F01C 1/077 takes precedence)
F01C 17/04
.
of cam-and-follower type (F01C 1/067 takes precedence)
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F01C 17/06
.
using cranks, universal joints or similar elements (F01C 1/07 takes precedence)
F01C 17/063
. .
{
with only rolling movement
}
F01C 17/066
. .
{
with an intermediate piece sliding along perpendicular axes, e.g. Oldham coupling
}
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Sealing arrangements in rotary-piston machines or engines (sealings in general F16J)
F01C 19/005
.
{
Structure and composition of sealing elements such as sealing strips, sealing rings and the like; Coating of these elements (vane construction F01C21/08B; piston rings and ring sealings of similar construction in general F16J 9/00)
}
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F01C 19/02
.
Radially-movable sealings for working fluid
F01C 19/025
. .
{
Radial sealing elements specially adapted for intermeshing engagement type machines or engines, e.g. gear machines or engines
}
F01C 19/04
. .
of rigid material
F01C 19/06
. .
of resilient material
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F01C 19/08
.
Axially-movable sealings for working fluid
F01C 19/085
. .
{
Elements specially adapted for sealing of the lateral faces of intermeshing-engagement type machines or engines, e.g. gear machines or engines
}
F01C 19/10
.
Sealings for working fluids between radially and axially movable parts
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.
for other than working fluid
F01C 19/125
. .
{
Shaft sealings specially adapted for rotary or oscillating-piston machines or engines
}
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Control of, monitoring of, or safety arrangements for, machines or engines
F01C 20/02
.
specially adapted for several machines or engines connected in series or in parallel
F01C 20/04
.
specially adapted for reversible machines or engines
F01C 20/06
.
specially adapted for stopping, starting, idling or no-load operation
F01C 20/08
.
characterised by varying the rotational speed
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F01C 20/10
.
characterised by changing the position of the inlet or outlet openings with respect to the working chamber
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F01C 20/12
. .
using sliding valves
F01C 20/125
. . .
{
with sliding valves controlled by the use of fluid other than the working fluid
}
F01C 20/14
. .
using rotating valves
F01C 20/16
. .
using lift valves
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.
characterised by varying the volume of the working chamber (by changing the positions of inlet or outlet openings F01C 20/10)
F01C 20/185
. .
{
by varying the useful pumping length of the cooperating members in the axial direction
}
F01C 20/20
. .
by changing the form of the inner or outlet contour of the working chamber
. .
by changing the eccentricity between cooperating members
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F01C 20/24
.
characterised by using valves regulating pressure or flow rate, e.g. discharge valves, unloading valves (F01C 20/10 takes precedence)
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F01C 20/26
. .
using bypass channels
F01C 20/265
. . .
{
being obtained by displacing a lateral sealing face
}
F01C 20/28
.
Safety arrangements; Monitoring
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Component parts, details or accessories not provided for in groups F01C 1/00 to F01C 20/00
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F01C 21/001
.
{
Injection of a fluid in the working chamber for sealing, cooling and lubricating (sealing only F01C 17/00; lubrication only F01C 21/04; cooling only F01C 21/06; injecting water or steam in internal combustion engines F02B 47/02, F02D 21/00, F02M 25/00)
}
F01C 21/002
. .
{
with control systems for the injection of the fluid
}
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F01C 21/003
.
{
Systems for the equilibration of forces acting on the elements of the machine (interstice adjustment other than by fluid pressure F01C 21/102)
}
F01C 21/005
. .
{
Internal leakage control
}
F01C 21/006
. .
{
Equalization of pressure pulses (silencing for compressors F04C 29/06)
}
.
{
General arrangements of parts; Frames and supporting elements
}
.
{
Driving elements, brakes, couplings, transmissions specially adapted for rotary or oscillating-piston machines or engines (brakes, couplings, transmissions per se F16, B60)
}
F01C 21/02
.
Arrangements of bearings (bearing constructions F16C)
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F01C 21/04
.
Lubrication (of machines or engines in general F01M)
F01C 21/045
. .
{
Control systems for the circulation of the lubricant
}
F01C 21/06
.
Heating; Cooling (of machines or engines in general F01P); Heat insulation (heat insulation in general F16L)
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F01C 21/08
.
Rotary pistons (reciprocating piston in general F16J)
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. .
{
Construction of vanes or vane holders
}
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F01C 21/0818
. . .
{
Vane tracking; control therefor
}
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F01C 21/0827
. . . .
{
by mechanical means
}
. . . . .
{
comprising guiding means, e.g. cams, rollers
}
F01C 21/0845
. . . . .
{
comprising elastic means, e.g. springs
}
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F01C 21/0854
. . . .
{
by fluid means
}
F01C 21/0863
. . . . .
{
the fluid being the working fluid
}
F01C 21/0872
. . . . .
{
the fluid being other than the working fluid
}
F01C 21/0881
. . .
{
the vanes consisting of two or more parts
}
F01C 21/089
. . .
{
for synchronised movement of the vanes
}
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.
Outer members for co-operation with rotary pistons; Casings (casings for rotary engines or machines in general F16M)
F01C 21/102
. .
{
Adjustment of the interstices between moving and fixed parts of the machine by means other than fluid pressure
}
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F01C 21/104
. .
{
Stators; Members defining the outer boundaries of the working chamber
}
F01C 21/106
. . .
{
with a radial surface, e.g. cam rings
}
F01C 21/108
. . .
{
with an axial surface, e.g. side plates
}
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F01C 2021/12
.
{
Control of working fluid admission or discharge
}
F01C 2021/125
. .
{
Arrangements for supercharging the working space
}
F01C 2021/14
. .
{
for variable fluid distribution
}
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F01C 2021/16
.
{
Other regulation or control
}
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F01C 2021/1606
. .
{
Variation of the working chamber
}
F01C 2021/1612
. . .
{
by changing the eccentricity of an element with respect to another element
}
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F01C 2021/1618
. . .
{
by changing the positions of the inlet and outlet openings with respect to the working chambers
}
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F01C 2021/1625
. . . .
{
with sliding or rotating valves, adjustable in position
}
F01C 2021/1631
. . . . .
{
with sliding valves controlled by the use of fluid other than the working fluid
}
F01C 2021/1637
. . .
{
by changing the form of the radially inner or the radially outer contour of the working chamber
}
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F01C 2021/1643
. .
{
by using valves regulating pressure and flow rate, e.g. discharge valves
}
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F01C 2021/165
. . .
{
using a by-pass channel
}
F01C 2021/1656
. . . .
{
being obtained by displacing a lateral sealing face
}
F01C 2021/1662
. . .
{
with venting means
}
F01C 2021/1668
. .
{
with several machines or engines connected in series or in parallel
}
F01C 2021/1675
. .
{
with reversible machines or engines
}
F01C 2021/1681
. .
{
by varying the rotational speed
}
F01C 2021/1687
. .
{
Safety arrangements
}
F01C 2021/1693
. .
{
Stopping or starting, idling or no-load operation
}
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F01C 21/18
.
Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
F01C 21/183
. .
{
Arrangements for supercharging the working space (similar arrangements for internal combustion engines F02B 33/00, F02B 27/00)
}
F01C 21/186
. .
{
for variable fluid distribution
}
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Last Modified: 10/10/2013