ClassID:

136756

F01C21/18 - CPC Classification

Classification description:

Component parts, details or accessories not provided for in groups  -  Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet

Sub-classes:
Recent Application in this class:
#1
20260078674
2026-03-19

Two-Stroke Rotary Engine with Improved Inlet and Outlet Ports

#2
20250243759
2025-07-31

ROTATIONAL ENGINE WITH INNER AND OUTER RINGS

#3
20250116223
2025-04-10

ROTARY PISTON MACHINE

#4
20240141789
2024-05-02

Rotational engine with inner and outer rings

#5
20240076986
2024-03-07

Systems and methods for a partial state condenser

#6
20240003255
2024-01-04

Rotor unit assembly

#7
20230287793
2023-09-14

Systems and methods for a heat engine system

#8
20230287792
2023-09-14

VANE MOTOR

#9
20230243261
2023-08-03

External combustion rotary engine

#10
20230167819
2023-06-01

Scroll compressor including discharge guide to quicken discharge refrigerant flow movement

#11
20220389819
2022-12-08

Full-metal anti-high temperature cycloid downhole motor

#12
20220307413
2022-09-29

Topological rotary engine

#13
20220290566
2022-09-15

VANE MOTOR

#14
20220282623
2022-09-08

Gas-cycle system for heating or cooling

#15
20220282622
2022-09-08

Pistonless rotary motor for air compressor

#16
20220243648
2022-08-04

Erez Engine - An Internal Combustion Rotary Engine

#17
20220018346
2022-01-20

Scroll expander with back pressure chamber

#18
20220018255
2022-01-20

Rotational engine with inner and outer rings

#19
20210402587
2021-12-30

Flow path diverter for pneumatic tool

#20
20210381379
2021-12-09

System for controlling admission volume of inlet gas for fixed RPM operation of rotary or reciprocating expander

#21
20210301662
2021-09-30

Rotary vane compressor with a step in the bearing adjacent the rail groove

#22
20210284347
2021-09-16

Gas delivery augmenter with pump mechanism

#23
20210222555
2021-07-22

Expander and fluid circulation system comprising same

#24
20210140317
2021-05-13

Rotating heating chamber apparatus and method of use thereof

#25
20210071530
2021-03-11

Multi-injection port rotary engine apparatus and method of use thereof

#26
20200392845
2020-12-17

Spherical energy converter

#27
20200271144
2020-08-27

Pneumatic control device

#28
20200270993
2020-08-27

Rotary fluid pressure device with drive-in-drive valve arrangement

#29
20200158011
2020-05-21

Rotary internal combustion engine with removable subchamber insert

#30
20200123971
2020-04-23

Compound engine system with rotary engine

#31
20200123970
2020-04-23

Rotary internal combustion engine with unequal volumetric ratios

#32
20200116076
2020-04-16

Engine intake assembly with selector valve

#33
20200072133
2020-03-05

CAM ROTARY ENGINE POWER SYSTEM OF INTERNAL COMBUSTION TYPE

#34
20190309626
2019-10-10

Packaged compressor housing

#35
20190218998
2019-07-18

Engine assembly with combined engine and cooling exhaust

#36
20190195222
2019-06-27

Rotary drive with pivoting stator and rotor vanes

#37
20190186352
2019-06-20

AUXILIARY POWER UNIT WITH COMBINED COOLING OF GENERATOR

#38
20190162108
2019-05-30

Rotary engine with pilot subchambers

#39
20190120054
2019-04-25

ROTARY STEAM MOTOR

#40
20190112973
2019-04-18

Compound engine assembly with offset turbine shaft, engine shaft and inlet duct

#41
20190093480
2019-03-28

Fixed displacement turbine engine

#42
20190055882
2019-02-21

Rotary internal combustion engine with pilot subchamber

#43
20190003306
2019-01-03

Gas passage switching structure for pneumatic rotary hand tool

#44
20180274501
2018-09-27

Composite intake system and method of the rotary engine with variable intake manifold

#45
20180209272
2018-07-26

Pneumatic motor with dual air intake

#46
20180187593
2018-07-05

Rotary internal combustion engine with pilot subchamber

#47
20180187591
2018-07-05

Engine intake assembly with selector valve

#48
20180187549
2018-07-05

Double-working-medium expander used for two-stage organic Rankine cycle

#49
20180080371
2018-03-22

Rotary internal combustion engine with pilot subchamber

#50
20180076690
2018-03-15

Electricity generator and methods for generating electricity

#51
20180073364
2018-03-15

Prime mover assembly having fixed center member between rotating members

#52
20180045110
2018-02-15

Rotary internal combustion engine

#53
20180030858
2018-02-01

Scissor type compression and expansion machine used in a thermal energy recuperation system

#54
20170362938
2017-12-21

Rotary fluid pressure device with drive-in-drive valve arrangement

#55
20170350251
2017-12-07

OPTIMAL EXPANDER OUTLET PORTING

#56
20170350250
2017-12-07

FREE ROTARY FLUID MACHINE

#57
20170335762
2017-11-23

Compound engine system with rotary engine

#58
20170328274
2017-11-16

Internal combustion engine with split pilot injection

#59
20170226959
2017-08-10

Engine assembly with combined engine and cooling exhaust

#60
20170167262
2017-06-15

Scroll expander

#61
20170138359
2017-05-18

Piston machine with cooling function

#62
20170074192
2017-03-16

Stop control system for direct-injection type internal combustion engine

#63
20170074160
2017-03-16

Rotary internal combustion engine with variable volumetric compression ratio

#64
20170067395
2017-03-09

Rotary internal combustion engine with pilot subchamber

#65
20170067303
2017-03-09

Genset for top drive unit

#66
20170044899
2017-02-16

Motor/engine with rotating pistons

#67
20170037776
2017-02-09

Auxiliary power unit with combined cooling of generator

#68
20170009581
2017-01-12

Fixed displacement turbine engine

#69
20160369795
2016-12-22

Variable delivery external gear machine

#70
20160363113
2016-12-15

Friction-free Rotary Piston Scissor Action Motor / Hot Air Energy Generator

#71
20160290222
2016-10-06

Improved-efficiency rotary engine with moveable baffle

#72
20160258291
2016-09-08

Reversing mechanism for a power tool

#73
20160251961
2016-09-01

Rotary internal combustion engine, gas compressor, and liquid pump

#74
20160245174
2016-08-25

Compound engine assembly with inlet lip anti-icing

#75
20160245166
2016-08-25

Compound engine assembly with coaxial compressor and offset turbine section

#76
20160245162
2016-08-25

COMPOUND ENGINE ASSEMBLY WITH OFFSET TURBINE SHAFT, ENGINE SHAFT AND INLET DUCT

#77
20160245161
2016-08-25

Compound engine assembly with modulated flow

#78
20160245152
2016-08-25

Engine intake assembly with selector valve

#79
20160201463
2016-07-14

FLUID DEVICE OUTPUT SHAFT WITH COATING

#80
20160160751
2016-06-09

Rotary internal combustion engine

#81
20160115792
2016-04-28

Hydrostatic positive displacement machine

#82
20150377024
2015-12-31

Oscillatory Rotary Engine

#83
20150315913
2015-11-05

Rotary machine

#84
20150308272
2015-10-29

ROTARY PISTON ENGINE, IN PARTICULAR WITH ROTARY PISTONS CIRCULATING ABOUT THE IGNITION CHAMBER

#85
20150300174
2015-10-22

Unitary pump and turbine energy exchanger

#86
20150300173
2015-10-22

Ignition engine of the rotary type with a double rotation center

#87
20150292328
2015-10-15

Rotary internal combustion engine

#88
20150275670
2015-10-01

VANE MACHINE HAVING STATIONARY AND ROTATING CYLINDERS WITH REDUCED CLEARANCE

#89
20150240710
2015-08-27

Rotary internal combustion engine with pilot subchamber

#90
20150233286
2015-08-20

Compound engine system with rotary engine

#91
20150184546
2015-07-02

Rankine cycle device, expansion system and expansion machine

#92
20150114213
2015-04-30

Pneumatic motor and pneumatic valve for the same

#93
20150086407
2015-03-26

Rotary piston engine which acts as a pump, condenser or motor for a fluid

#94
20150075483
2015-03-19

Rotary internal combustion engine with exhaust purge

#95
20150071807
2015-03-12

Swinging abutment rotary pump

#96
20140325986
2014-11-06

Rotary engine and process

#97
20140318363
2014-10-30

Harmonic uniflow engine

#98
20140261289
2014-09-18

Rotary internal combustion engine

#99
20140224207
2014-08-14

Rotary internal combustion engine with variable volumetric compression ratio

#100
20140178237
2014-06-26

Heat engine with linear actuators

#101
20140147321
2014-05-29

Fluid device with roll pockets alternatingly pressurized at different pressures

#102
20130343942
2013-12-26

Rotary compressor

#103
20130302199
2013-11-14

Scroll expander

#104
20130247866
2013-09-26

Port for rotary internal combustion engine

#105
20130224056
2013-08-29

Pump or motor for liquid or gaseous media having an increased diameter shaft toward a slanted sliding plane

#106
20130202471
2013-08-08

Cylinder dividing mechanism of a pneumatic tool

#107
20130186366
2013-07-25

Fuel reactivity stratification in rotary diesel engines

#108
20130133613
2013-05-30

Rotary engine with rotating pistons and cylinders

#109
20130129547
2013-05-23

Rotary engine exhaust apparatus and method of operation therefor

#110
20130092122
2013-04-18

Rotary engine

#111
20130045124
2013-02-21

Revolving vane expander having delivery conduit arranged to control working fluid flow

#112
20130028772
2013-01-31

Compound engine system with rotary engine

#113
20130028768
2013-01-31

Rotary internal combustion engine with exhaust purge

#114
20130025567
2013-01-31

Rotary internal combustion engine with pilot subchamber

#115
20130025566
2013-01-31

Rotary internal combustion engine with variable volumetric compression ratio

#116
20130004353
2013-01-03

PARTITION AND PARTITION CHAMBER FOR ROTARY ENGINES

#117
20120288391
2012-11-15

Heat engine

#118
20120227703
2012-09-13

Rotary engine with rotary power heads

#119
20120207866
2012-08-16

Double-flow screw spindle machine

#120
20120148434
2012-06-14

Scroll Fluid Machine

#121
20120134860
2012-05-31

“Turbomotor” rotary machine with volumetric expansion and variants thereof

#122
20120080006
2012-04-05

ROTARY MODULATION ENGINE

#123
20120031141
2012-02-09

Fluid Machine, and Refrigerant Circuit and Waste Heat Utilization Device Using the Fluid Machine

#124
20110262292
2011-10-27

Vane air motor

#125
20110176948
2011-07-21

Semi-hermetic scroll compressors, vacuum pumps, and expanders

#126
20110174499
2011-07-21

Flow regulator for downhole progressing cavity motor

#127
20110132309
2011-06-09

Oscillatory rotary engine

#128
20110100025
2011-05-05

FLUID MACHINE AND REFRIGERATION CYCLE APPARATUS

#129
20110083637
2011-04-14

Rotary double engine

#130
20110002803
2011-01-06

EXPANDER

#131
20100300402
2010-12-02

Rotary piston for a rotary piston engine and rotary piston engine

#132
20100199947
2010-08-12

Rotary piston machine

#133
20100158729
2010-06-24

Rotary expander with discharge and introduction passages for working fluid

#134
20100104462
2010-04-29

PUMP OR MOTOR

#135
20100043481
2010-02-25

Two-stage rotary expander, expander-compressor unit, and refrigeration cycle apparatus

#136
20100018490
2010-01-28

Rotary internal combustion engine with annular chamber

#137
20100012077
2010-01-21

Internal combustion two stroke rotary engine system

#138
20100000492
2010-01-07

MODIFIED REVOLVING PISTON INTERNAL COMBUSTION ENGINE

#139
20090282845
2009-11-19

EXPANDER AND HEAT PUMP USING THE EXPANDER

#140
20090120406
2009-05-14

Rotary piston and cylinder devices

#141
20090038581
2009-02-12

Oscillating piston engine

#142
20080264379
2008-10-30

Rotary Engine

#143
20080050258
2008-02-28

Orbital engine

#144
20060008374
2006-01-12

Vane-type rotary apparatus with split vanes

#145
20050260092
2005-11-24

Turbostatic compressor, pump, turbine and hydraulic motor and method of its operation

#146
20050220642
2005-10-06

Switch valve structure of fluid machine

#147
20050193975
2005-09-08

Rotary engine

#148
20050188689
2005-09-01

Electrical power supply system

#149
20050087066
2005-04-28

Rotary fluid machine

#150
20050042126
2005-02-24

Vane type rotary machine

#151
20050019161
2005-01-27

Rotary fluid machine

#152
15652637
2020-12-22

Rotary engine