ClassID:

136596

F01C1/084 - CPC Classification

Classification description:

Rotary-piston machines or engines of intermeshing engagement type, i.e. with engagement of co- operating members similar to that of toothed gearing; Details specially related to intermeshing engagement type machines or engines Toothed wheels

Recent Application in this class:
#1
20250314289
2025-10-09

LOGARITHMIC HOLLOW SHAFT SPEED REDUCER

#2
20220282621
2022-09-08

Gear wheel having an improved profile

#3
20220186728
2022-06-16

Electric pump

#4
20210301825
2021-09-30

Rotary fluid flow device

#5
20210246896
2021-08-12

Pump particularly for pumping a liquid such as ink, paint, glue or the like

#6
20200400022
2020-12-24

Rotary piston engine and method for operating a rotary piston engine

#7
20200392956
2020-12-17

Toothing system for a gerotor pump, and method for geometric determination thereof

#8
20200018167
2020-01-16

Sealing sleeve for geared shaft of gearmotor assembly

#9
20190271317
2019-09-05

Rotary fluid flow device

#10
20190226480
2019-07-25

Motor-driven roots pump

#11
20190136692
2019-05-09

Internal bearing plate for gearmotor assembly

#12
20180100502
2018-04-12

ROTARY DEVICE AND A METHOD OF DESIGNING AND MAKING A ROTARY DEVICE

#13
20180023561
2018-01-25

Bi-helical toothed wheel with variable helix angle and non-encapsulated profile for a hydraulic gear apparatus

#14
20170227009
2017-08-10

Pair of co-operating screw rotors

#15
20170114883
2017-04-27

Mechanical seal for gearmotor assembly having threaded bearing retainer

#16
20170114641
2017-04-27

Internal bearing plate for gearmotor assembly

#17
20170114640
2017-04-27

Sealing sleeve for geared shaft of gearmotor assembly

#18
20170009583
2017-01-12

Actuator of a rotary positive displacement machine

#19
20160265528
2016-09-15

Gear pump or hydraulic gear motor with helical toothing provided with hydraulic system for axial thrust balance

#20
20160097390
2016-04-07

Vacuum pump rotor for a vacuum pump having a roots pumping mechanism

#21
20150354357
2015-12-10

HYDRAULIC GEAR MOTOR, GEAR PUMP AND GEARBOX WITH CONTINUOUSLY VARIABLE PARAMETERS

#22
20150330387
2015-11-19

Geared hydraulic machine and relative gear wheel

#23
20150086407
2015-03-26

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

#24
20150086406
2015-03-26

Reduced noise screw machines

#25
20140341769
2014-11-20

Pump rotor and internal gear pump using the same

#26
20140322060
2014-10-30

Fluid-pressure apparatus with gears having tooth profiles

#27
20140271314
2014-09-18

Gear wheel with profile capable of meshing with semi-encapsulation in a geared hydraulic apparatus

#28
20140199198
2014-07-17

Internal gear pump

#29
20140102233
2014-04-17

Device of a pair of claw-type rotors having same profiles

#30
20130280062
2013-10-24

Coupling structure for vacuum exhaust device and vacuum exhaust system

#31
20130224056
2013-08-29

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

#32
20130209306
2013-08-15

Rotary positive displacement machine

#33
20130142685
2013-06-06

Rotary device and a method of designing and making a rotary device

#34
20130052072
2013-02-28

LUBRICATION OF SCREW MACHINES

#35
20130034462
2013-02-07

Fluid energy transfer device

#36
20120269669
2012-10-25

Rotors formed using involute curves

#37
20120145119
2012-06-14

Rotary device

#38
20120134865
2012-05-31

ROTARY MECHANISM

#39
20100269617
2010-10-28

METHOD OF PRODUCING A POLYMER COATING

#40
20100251757
2010-10-07

Refrigeration cycle apparatus and fluid machine used for the same

#41
20100215531
2010-08-26

Method for converting energy from compressed air into mechanical energy and compressed air motor therefor

#42
20100192896
2010-08-05

INTERNAL COMBUSTION ENGINES WITH RING-SHAPED CYLINDERS

#43
20100111743
2010-05-06

Meshing Surfaces For Intersecting Vanes

#44
20100104463
2010-04-29

Geared hydraulic apparatus

#45
20100104462
2010-04-29

PUMP OR MOTOR

#46
20100028188
2010-02-04

Low speed, high torque rotary abutment motor

#47
20090297385
2009-12-03

Rotary Motor With Intermittent Movements of the Rotors

#48
20090159040
2009-06-25

Energy transfer machine with inner rotor

#49
20090078231
2009-03-26

Energy transfer machine

#50
20080271701
2008-11-06

Inverted cardioid wankel engine

#51
20080206083
2008-08-28

Seal system and scroll type fluid machine

#52
20080193317
2008-08-14

Screw Rotor and Screw Fluid Machine

#53
20080193315
2008-08-14

ROOTS-TYPE FLUID MACHINE

#54
20080138230
2008-06-12

Pressure sealed tapered screw pump/motor

#55
20070295301
2007-12-27

Energy transfer machine with inner rotor

#56
20070251491
2007-11-01

Energy transfer machine

#57
20070175435
2007-08-02

Rotary compressor and expander, and rotary engine using the same

#58
20070175202
2007-08-02

Axial flow positive displacement worm compressor

#59
20070137174
2007-06-21

Axial flow positive displacement worm gas generator

#60
20060216181
2006-09-28

SCROLL FLUID MACHINE COMPRISING COMPRESSING AND EXPANDING SECTIONS

#61
20060196464
2006-09-07

External combustion rotary piston engine

#62
20060196184
2006-09-07

Helical screw expander for power production from solar, geothermal, and industrial processes

#63
20060078453
2006-04-13

Mechanism of the screw rotor

#64
20050276704
2005-12-15

Piston for a rotary combustion engine

#65
20050271535
2005-12-08

Closed system rotary machine

#66
20050254982
2005-11-17

Internal gear machine with variable capacity

#67
20050244294
2005-11-03

Screw fluid machine

#68
20050129561
2005-06-16

Gapless screw rotor device

#69
20050031469
2005-02-10

Scroll fluid machine comprising compressing and expanding sections

#70
18408876
2024-06-11

Rotary engine