Patents-Review.com
ClassID:

143413 ⎘

F04C2/08 - CPC Classification

Classification description:

Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing

Sub-classes:
Recent Application in this class:
#1
20250369441
2025-12-04

AUTOMOTIVE ELECTRIC OIL PUMP

 #2
20250369371
2025-12-04

PUMP ASSEMBLY FOR GAS TURBINE ENGINES

 #3
20250250979
2025-08-07

POSITIVE DISPLACEMENT PUMP SYSTEM

 #4
20250207583
2025-06-26

FLUID ROTARY MACHINE WITH AN ENCODER MODULE

 #5
20240200557
2024-06-20

Gear pump with intermeshing gear wheels enclosed by housing with bearing journals arranged on shaft axes and use thereof

 #6
20240035470
2024-02-01

Electric-motor-driven hydraulic pump actuator

 #7
20230313795
2023-10-05

Pump integrated with two independently driven prime movers

 #8
20230228266
2023-07-20

FLUID PRESSURE UNIT

 #9
20230175550
2023-06-08

Flared springs for bearing assemblies

 #10
20220341407
2022-10-27

Method and system for transportating fluid, and device employing system and method

 #11
20220320941
2022-10-06

Rotary electric machine and pump

 #12
20220266948
2022-08-25

Hydraulic automatic transmission bicycle

 #13
20220252066
2022-08-11

Split power gerotor pump

 #14
20220220959
2022-07-14

Pump integrated with two independently driven prime movers

 #15
20220047861
2022-02-17

Gear pump

 #16
20210396227
2021-12-23

PUMP PARTICULARLY FOR PUMPING ABRASIVE AND/OR CHEMICALLY AGGRESSIVE LIQUIDS

 #17
20210317828
2021-10-14

External gear pump integrated with two independently driven prime movers

 #18
20210285443
2021-09-16

Pump insert and pump array comprising such a pump insert

 #19
20210198454
2021-07-01

Composite material for low-wear mechanical components for force and motion transmission

 #20
20200405535
2020-12-31

COOLING PAD; COOLING APPARATUS; COOLING SYSTEM AND METHOD FOR OPERATING A COOLING PAD AND A COOLING APPARATUS

 #21
20200392812
2020-12-17

Electric/hydraulic safety valve

 #22
20200309121
2020-10-01

Electric oil pump for hydraulic control and oil supplying system provided with the same

 #23
20200248684
2020-08-06

External gear pump integrated with two independently driven prime movers

 #24
20200232477
2020-07-23

Electric oil pump

 #25
20200224664
2020-07-16

Pump device, especially for mobile means of transport

 #26
20200173551
2020-06-04

Hydrostatic transmission assembly and system

 #27
20200172199
2020-06-04

Hydraulic automatic transmission bicycle

 #28
20200088623
2020-03-19

System and method for providing stable fluid flow

 #29
20190110375
2019-04-11

Dual motor gear pump

 #30
20190110374
2019-04-11

Coolant distribution unit

 #31
20190063431
2019-02-28

External gear pump

 #32
20190003478
2019-01-03

Self adjusting pump for ice cream freezer

 #33
20180372097
2018-12-27

Pump comprising a spring

 #34
20180297466
2018-10-18

ELECTRIC AND HYDRAULIC DRIVE SYSTEM AND METHODS

 #35
20180258929
2018-09-13

Fluid pump with rotating pumping element wear reduction

 #36
20180223598
2018-08-09

Lobed rotor with circular section for fluid-driving apparatus

 #37
20180172003
2018-06-21

Pump integrated with two independently driven prime movers

 #38
20180135628
2018-05-17

Systems and methods of securing a compliant member in a pump

 #39
20180011500
2018-01-11

Method for compensating leakage losses and conveyor system for conveying a defined volume of a liquid

 #40
20170350471
2017-12-07

Actuator arrangement for applying a torque to a shaft, in particular a crankshaft of a reciprocating piston engine, and a corresponding method

 #41
20170314674
2017-11-02

Hydrostatic transmission assembly and system

 #42
20170291661
2017-10-12

Hydraulic automatic transmission bicycle

 #43
20170254327
2017-09-07

Stator for an eccentric screw pump, an eccentric screw pump and a method for producing a stator

 #44
20170204854
2017-07-20

External gear pump integrated with two independently driven prime movers

 #45
20170198693
2017-07-13

Gear pump

 #46
20170191922
2017-07-06

System and method for providing stable fluid flow

 #47
20170184098
2017-06-29

Container assembly for a pump

 #48
20170184095
2017-06-29

Gear pump

 #49
20170015106
2017-01-19

Gear pump and image recording apparatus

 #50
20160305428
2016-10-20

Pump comprising a spring

 #51
20160258656
2016-09-08

System including high-side and low-side compressors

 #52
20160245284
2016-08-25

Fluid pump

 #53
20160230760
2016-08-11

POSITIVE DISPLACEMENT GEAR PUMP

 #54
20160186929
2016-06-30

Lubricant reservoir low level indicator

 #55
20160186740
2016-06-30

Electronic pump motor control

 #56
20160160858
2016-06-09

Fluid pump with two pumps

 #57
20160047377
2016-02-18

Positive displacement gear pump

 #58
20150369242
2015-12-24

Internal gear pump having a rotationally fixed axial disk

 #59
20150361972
2015-12-17

REFRIGERANT COMPRESSOR SYSTEM

 #60
20150336190
2015-11-26

Method of machining a rotor with variable-lead screw

 #61
20150315980
2015-11-05

Gas turbine engine fuel system

 #62
20150275893
2015-10-01

Rotary piston pump having direct drive

 #63
20150260183
2015-09-17

High pressure gear pump with dual wall housing

 #64
20150240812
2015-08-27

METHOD FOR CONVEYING HYDRAULIC FLUID, AND ELECTROHYDRAULIC MOTOR-PUMP UNIT THEREFOR

 #65
20150152865
2015-06-04

Compact structure of gear pump designed to minimize loss of pumping torque

 #66
20150147213
2015-05-28

Gas compressor

 #67
20150139792
2015-05-21

Internal Gear Pump

 #68
20150097339
2015-04-09

Sealing arrangement, a conveying device having a sealing arrangement and a method for operating the sealing arrangement

 #69
20150010416
2015-01-08

Controller for varying flow rate from fixed displacement pump

 #70
20140348685
2014-11-27

Coupling shaft for gear pump

 #71
20140294649
2014-10-02

Sealing for a pump device

 #72
20140286801
2014-09-25

Pumping device for pumping oil from a storage container to a transmission system of a motor vehicle

 #73
20140271313
2014-09-18

Toothed-Lobed Gear Pump

 #74
20140271312
2014-09-18

Piston with replaceable and/or adjustable surfaces

 #75
20140161655
2014-06-12

PUMP

 #76
20130315766
2013-11-28

Screw compressor unit

 #77
20130309120
2013-11-21

DOUBLE INTERNAL GEAR WHEEL PUMP

 #78
20130251572
2013-09-26

Methods and Apparatus for Enhancing Elastomeric Stator Insert Material Properties with Radiation

 #79
20130236346
2013-09-12

TWO STEP COMPRESSOR UNIT AND COMPRESSOR SYSTEM HAVING THE SAME

 #80
20130202473
2013-08-08

Two-spindle screw pump of double-flow construction

 #81
20120219447
2012-08-30

Coupling shaft for gear pump

 #82
20100247746
2010-09-30

Method and apparatus for multi-stream metered extrusion

 #83
20100043409
2010-02-25

Method and system for controlling the operation of a pump

 #84
20090104057
2009-04-23

PUMP HAVING MAGNETIC COUPLING MECHANISM

 #85
20090084104
2009-04-02

Pressure recovery system

 #86
20070259199
2007-11-08

Oil pump

 #87
20070246855
2007-10-25

Method and apparatus for multi-stream metered extrusion

 #88
20070023088
2007-02-01

Fluid Transfer Pump

 #89
20060083638
2006-04-20

Self-priming positive displacement constant flow high capacity pump

 #90
17300544
2023-10-24

Hydraulic pump to synchronize the operation of a pair of hydraulic actuators

 #91
16113160
2019-11-26

Follower plate geometry