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CPC
COOPERATIVE PATENT CLASSIFICATION
F01C
ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES (internal-combustion aspects F02B 53/00, F02B 55/00) [2018-08]
NOTES

  • 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".
WARNING

  • In this subclass non-limiting references (in the sense of paragraph 39 of the Guide to the IPC) may still be displayed in the scheme.
F01C 1/00
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) [2016-05]
NOTE

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 [2013-01]
F01C 1/0207
. .
{both members having co-operating elements in spiral form} [2013-01]
F01C 1/0215
. . .
{where only one member is moving} [2013-01]
F01C 1/0223
. . . .
{with symmetrical double wraps} [2013-01]
F01C 1/023
. . .
{where both members are moving} [2013-01]
F01C 1/0238
. . . .
{with symmetrical double wraps} [2013-01]
F01C 1/0246
. . .
{Details concerning the involute wraps or their base, e.g. geometry} [2013-01]
F01C 1/0253
. . . .
{Details concerning the base} [2013-01]
F01C 1/0261
. . . . .
{Details of the ports, e.g. location, number, geometry} [2013-01]
F01C 1/0269
. . . .
{Details concerning the involute wraps} [2013-01]
F01C 1/0276
. . . . .
{Different wall heights} [2013-01]
F01C 1/0284
. . . . .
{Details of the wrap tips} [2013-01]
F01C 1/0292
. . . . .
{Ports or channels located in the wrap} [2013-01]
F01C 1/04
. .
of internal-axis type [2013-01]
F01C 1/045
. . .
{having a C-shaped piston} [2013-01]
F01C 1/06
. .
of other than internal-axis type (F01C 1/063 takes precedence) [2014-02]
F01C 1/063
. .
with coaxially-mounted members having continuously-changing circumferential spacing between them [2014-02]
F01C 1/067
. . .
having cam-and-follower type drive [2014-02]
F01C 1/07
. . .
having crankshaft-and-connecting-rod type drive [2014-02]
F01C 1/073
. . .
having pawl-and-ratchet type drive [2014-02]
F01C 1/077
. . .
having toothed-gearing type drive [2014-02]
F01C 1/08
.
of intermeshing engagement type, i.e. with engagement of co- operating members similar to that of toothed gearing [2013-01]
F01C 1/082
. .
{Details specially related to intermeshing engagement type machines or engines} [2013-01]
F01C 1/084
. . .
{Toothed wheels} [2013-01]
F01C 1/086
. . .
{Carter} [2013-01]
F01C 1/088
. . .
{Elements in the toothed wheels or the carter for relieving the pressure of fluid imprisoned in the zones of engagement} [2013-01]
F01C 1/10
. .
of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member [2013-01]
F01C 1/101
. . .
{Moineau-type} [2013-01]
F01C 1/102
. . .
{with a crescent shaped filler element located between the intermeshing elements} [2013-01]
F01C 1/103
. . .
{the two members rotating simultaneously around their respective axes} [2013-01]
F01C 1/104
. . .
{one member having simultaneously a rotational movement about its own axis and an orbital movement} [2013-01]
F01C 1/105
. . . .
{and having an articulated driving shaft} [2013-01]
F01C 1/107
. . .
with helical teeth [2013-01]
F01C 1/113
. . .
the inner member carrying rollers intermeshing with the outer member [2013-01]
F01C 1/12
. .
of other than internal-axis type [2013-01]
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} [2013-01]
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} [2013-01]
F01C 1/14
. . .
with toothed rotary pistons [2013-01]
F01C 1/16
. . . .
with helical teeth, e.g. chevron-shaped, screw type {(for non-parallel axes of movement F01C 3/00)} [2013-01]
F01C 1/165
. . . . .
{having more than two rotary pistons with parallel axes} [2013-01]
F01C 1/18
. . . .
with similar tooth forms (F01C 1/16 takes precedence) [2013-01]
F01C 1/20
. . . .
with dissimilar tooth forms (F01C 1/16 takes precedence) [2013-01]
F01C 1/22
.
of internal-axis type with equidirectional movement of co-operating members at the points 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 [2017-08]
F01C 1/24
.
of counter-engagement type, i.e. the movement of co-operating members at the points of engagement being in opposite directions [2013-01]
F01C 1/26
. .
of internal-axis type [2013-01]
F01C 1/28
. .
of other than internal-axis type [2013-01]
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 [2013-01]
F01C 1/32
. .
having both the movement defined in group F01C 1/02 and relative reciprocation between the co-operating members [2013-01]
F01C 1/321
. . .
{with vanes hinged to the inner member and reciprocating with respect to the inner member} [2013-01]
F01C 1/322
. . .
{with vanes hinged to the outer member and reciprocating with respect to the outer member} [2013-01]
F01C 1/324
. . .
with vanes hinged to the inner member and reciprocating with respect to the outer member [2013-01]
F01C 1/328
. . . .
and hinged to the outer member [2013-01]
F01C 1/332
. . .
with vanes hinged to the outer member and reciprocating with respect to the inner member [2013-01]
F01C 1/336
. . . .
and hinged to the inner member [2013-01]
F01C 1/34
. .
having the movement defined in group F01C 1/08 or F01C 1/22 and relative reciprocation between the co-operating members [2013-01]
F01C 1/344
. . .
with vanes reciprocating with respect to the inner member [2013-01]
F01C 1/3441
. . . .
{the inner and outer member being in contact along one line or continuous surface substantially parallel to the axis of rotation} [2013-01]
F01C 1/3442
. . . . .
{the surfaces of the inner and outer member, forming the working space, being surfaces of revolution} [2013-01]
F01C 1/3443
. . . . .
{with a separation element located between the inlet and outlet opening} [2013-01]
F01C 1/3445
. . . . .
{the vanes having the form of rollers, slippers or the like} [2013-01]
F01C 1/3446
. . . .
{the inner and outer member being in contact along more than one line or surface} [2013-01]
F01C 1/3447
. . . . .
{the vanes having the form of rollers, slippers or the like} [2013-01]
F01C 1/3448
. . . .
{with axially movable vanes} [2013-01]
F01C 1/348
. . . .
the vanes positively engaging, with circumferential play, an outer rotatable member [2013-01]
F01C 1/352
. . . .
the vanes being pivoted on the axis of the outer member [2013-01]
F01C 1/356
. . .
with vanes reciprocating with respect to the outer member [2013-01]
F01C 1/3562
. . . .
{the inner and outer member being in contact along one line or continuous surface substantially parallel to the axis of rotation} [2013-01]
F01C 1/3564
. . . . .
{the surfaces of the inner and outer member, forming the working space, being surfaces of revolution} [2013-01]
F01C 1/3566
. . . .
{the inner and outer member being in contact along more than one line or surface} [2013-01]
F01C 1/3568
. . . .
{with axially movable vanes} [2013-01]
F01C 1/36
. .
having both the movements defined in sub-groups F01C 1/22 and F01C 1/24 [2013-01]
F01C 1/38
. .
having the movement defined in group F01C 1/02 and having a hinged member (F01C 1/32 takes precedence) [2013-01]
F01C 1/39
. . .
with vanes hinged to the inner as well as to the outer member [2013-01]
F01C 1/40
. .
having the movement defined in group F01C 1/08 or F01C 1/22 and having a hinged member [2013-01]
F01C 1/44
. . .
with vanes hinged to the inner member [2013-01]
F01C 1/46
. . .
with vanes hinged to the outer member [2013-01]
F01C 3/00
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) [2013-01]
F01C 3/02
.
the axes being arranged at an angle of 90 degrees [2013-01]
F01C 3/025
. .
{of intermeshing engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing} [2013-01]
F01C 3/04
. .
with axially sliding vanes [2013-01]
F01C 3/06
.
the axes being arranged otherwise than at an angle of 90 degrees [2013-01]
F01C 3/08
. .
of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing [2013-01]
F01C 3/085
. . .
{the axes of cooperating members being on the same plane} [2013-01]
F01C 5/00
Rotary-piston machines or engines with the working-chamber walls at least partly resiliently deformable [2013-01]
F01C 5/02
.
the resiliently-deformable wall being part of the inner member, e.g. of a rotary piston [2013-01]
F01C 5/04
.
the resiliently-deformable wall being part of the outer member, e.g. of a housing [2013-01]
F01C 5/06
.
the resiliently-deformable wall being a separate member [2013-01]
F01C 5/08
. .
of tubular form, e.g. hose [2013-01]
F01C 7/00
Rotary-piston machines or engines with fluid ring or the like [2013-01]
F01C 9/00
Oscillating-piston machines or engines [2013-01]
F01C 9/002
.
{the piston oscillating around a fixed axis} [2013-01]
F01C 9/005
.
{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)} [2013-01]
F01C 9/007
.
{the points of the moving element describing approximately an alternating movement in axial direction with respect to the other element} [2013-01]
F01C 11/00
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) [2013-01]
F01C 11/002
.
{of similar working principle} [2013-01]
F01C 11/004
. .
{and of complementary function, e.g. internal combustion engine with supercharger} [2013-01]
F01C 11/006
.
{of dissimilar working principle} [2013-01]
F01C 11/008
. .
{and of complementary function, e.g. internal combustion engine with supercharger} [2013-01]
NOTE

  • Multi-stage steam engines or similar machines are not considered as having complementary function
F01C 13/00
Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby [2024-01]
F01C 13/02
.
for driving hand-held tools or the like [2013-01]
F01C 13/04
.
for driving pumps or compressors [2013-01]
F01C 17/00
Arrangements for drive of co-operating members, e.g. for rotary piston and casing [2013-01]
F01C 17/02
.
of toothed-gearing type (F01C 1/077 takes precedence) [2013-01]
F01C 17/04
.
of cam-and-follower type (F01C 1/067 takes precedence) [2013-01]
F01C 17/06
.
using cranks, universal joints or similar elements (F01C 1/07 takes precedence) [2013-01]
F01C 17/063
. .
{with only rolling movement} [2013-01]
F01C 17/066
. .
{with an intermediate piece sliding along perpendicular axes, e.g. Oldham coupling} [2013-01]
F01C 19/00
Sealing arrangements in rotary-piston machines or engines (sealings in general F16J) [2013-01]
F01C 19/005
.
{Structure and composition of sealing elements such as sealing strips, sealing rings and the like; Coating of these elements (vane construction F01C 21/0809; piston rings and ring sealings of similar construction in general F16J 9/00)} [2013-01]
F01C 19/02
.
Radially-movable sealings for working fluids [2017-08]
F01C 19/025
. .
{Radial sealing elements specially adapted for intermeshing engagement type machines or engines, e.g. gear machines or engines} [2013-01]
F01C 19/04
. .
of rigid material [2013-01]
F01C 19/06
. .
of resilient material [2013-01]
F01C 19/08
.
Axially-movable sealings for working fluids [2017-08]
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} [2013-01]
F01C 19/10
.
Sealings for working fluids between radially and axially movable parts [2013-01]
F01C 19/12
.
for other than working fluid [2013-01]
F01C 19/125
. .
{Shaft sealings specially adapted for rotary or oscillating-piston machines or engines} [2013-01]
F01C 20/00
Control of, monitoring of, or safety arrangements for, machines or engines [2013-01]
F01C 20/02
.
specially adapted for several machines or engines connected in series or in parallel [2013-01]
F01C 20/04
.
specially adapted for reversible machines or engines [2013-01]
F01C 20/06
.
specially adapted for stopping, starting, idling or no-load operation [2013-01]
F01C 20/08
.
characterised by varying the rotational speed [2013-01]
F01C 20/10
.
characterised by changing the positions of the inlet or outlet openings with respect to the working chamber [2017-08]
F01C 20/12
. .
using sliding valves [2013-01]
F01C 20/125
. . .
{with sliding valves controlled by the use of fluid other than the working fluid} [2013-01]
F01C 20/14
. .
using rotating valves [2013-01]
F01C 20/16
. .
using lift valves [2013-01]
F01C 20/18
.
characterised by varying the volume of the working chamber (by changing the positions of inlet or outlet openings F01C 20/10) [2013-01]
F01C 20/185
. .
{by varying the useful pumping length of the cooperating members in the axial direction} [2013-01]
F01C 20/20
. .
by changing the form of the inner or outlet contour of the working chamber [2013-01]
F01C 20/22
. .
by changing the eccentricity between cooperating members [2013-01]
F01C 20/24
.
characterised by using valves for controlling pressure or flow rate, e.g. discharge valves (F01C 20/10 takes precedence) [2017-02]
F01C 20/26
. .
using bypass channels [2013-01]
F01C 20/265
. . .
{being obtained by displacing a lateral sealing face} [2013-01]
F01C 20/28
.
Safety arrangements; Monitoring [2013-01]
F01C 21/00
Component parts, details or accessories not provided for in groups F01C 1/00 - F01C 20/00 [2016-05]
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)} [2013-01]
F01C 21/002
. .
{with control systems for the injection of the fluid} [2013-01]
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)} [2013-01]
F01C 21/005
. .
{Internal leakage control} [2013-01]
F01C 21/006
. .
{Equalization of pressure pulses (silencing for compressors F04C 29/06)} [2013-01]
F01C 21/007
.
{General arrangements of parts; Frames and supporting elements} [2013-01]
F01C 21/008
.
{Driving elements, brakes, couplings, transmissions specially adapted for rotary or oscillating-piston machines or engines (brakes, couplings, transmissions per se F16, B60)} [2013-01]
F01C 21/02
.
Arrangements of bearings (bearing constructions F16C) [2013-01]
F01C 21/04
.
Lubrication (of machines or engines in general F01M) [2013-01]
F01C 21/045
. .
{Control systems for the circulation of the lubricant} [2013-01]
F01C 21/06
.
Heating; Cooling (of machines or engines in general F01P); Heat insulation (heat insulation in general F16L) [2013-01]
F01C 21/08
.
Rotary pistons (reciprocating pistons in general F16J) [2017-08]
F01C 21/0809
. .
{Construction of vanes or vane holders} [2013-01]
F01C 21/0818
. . .
{Vane tracking; control therefor} [2013-01]
F01C 21/0827
. . . .
{by mechanical means} [2013-01]
F01C 21/0836
. . . . .
{comprising guiding means, e.g. cams, rollers} [2013-01]
F01C 21/0845
. . . . .
{comprising elastic means, e.g. springs} [2013-01]
F01C 21/0854
. . . .
{by fluid means} [2013-01]
F01C 21/0863
. . . . .
{the fluid being the working fluid} [2013-01]
F01C 21/0872
. . . . .
{the fluid being other than the working fluid} [2013-01]
F01C 21/0881
. . .
{the vanes consisting of two or more parts} [2013-01]
F01C 21/089
. . .
{for synchronised movement of the vanes} [2013-01]
F01C 21/10
.
Outer members for co-operation with rotary pistons; Casings (casings for rotary engines or machines in general F16M) [2013-01]
F01C 21/102
. .
{Adjustment of the interstices between moving and fixed parts of the machine by means other than fluid pressure} [2013-01]
F01C 21/104
. .
{Stators; Members defining the outer boundaries of the working chamber} [2013-01]
F01C 21/106
. . .
{with a radial surface, e.g. cam rings} [2013-01]
F01C 21/108
. . .
{with an axial surface, e.g. side plates} [2013-01]
F01C 2021/12
.
{Control of working fluid admission or discharge} [2013-01]
F01C 2021/125
. .
{Arrangements for supercharging the working space} [2013-01]
F01C 2021/14
. .
{for variable fluid distribution} [2013-01]
F01C 2021/16
.
{Other regulation or control} [2013-01]
F01C 2021/1606
. .
{Variation of the working chamber} [2013-01]
F01C 2021/1612
. . .
{by changing the eccentricity of an element with respect to another element} [2013-01]
F01C 2021/1618
. . .
{by changing the positions of the inlet and outlet openings with respect to the working chambers} [2013-01]
F01C 2021/1625
. . . .
{with sliding or rotating valves, adjustable in position} [2013-01]
F01C 2021/1631
. . . . .
{with sliding valves controlled by the use of fluid other than the working fluid} [2013-01]
F01C 2021/1637
. . .
{by changing the form of the radially inner or the radially outer contour of the working chamber} [2013-01]
F01C 2021/1643
. .
{by using valves regulating pressure and flow rate, e.g. discharge valves} [2013-01]
F01C 2021/165
. . .
{using a by-pass channel} [2013-01]
F01C 2021/1656
. . . .
{being obtained by displacing a lateral sealing face} [2013-01]
F01C 2021/1662
. . .
{with venting means} [2013-01]
F01C 2021/1668
. .
{with several machines or engines connected in series or in parallel} [2013-01]
F01C 2021/1675
. .
{with reversible machines or engines} [2013-01]
F01C 2021/1681
. .
{by varying the rotational speed} [2013-01]
F01C 2021/1687
. .
{Safety arrangements} [2013-01]
F01C 2021/1693
. .
{Stopping or starting, idling or no-load operation} [2013-01]
F01C 21/18
.
Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet [2013-01]
F01C 21/183
. .
{Arrangements for supercharging the working space (similar arrangements for internal combustion engines F02B 33/00, F02B 27/00)} [2013-01]
F01C 21/186
. .
{for variable fluid distribution} [2013-01]