Patents-Review.com
ClassID:

143417 ⎘

F04C2/088 - 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; Details specially related to intermeshing engagement type machines or pumps Elements in the toothed wheels or the carter for relieving the pressure of fluid imprisoned in the zones of engagement

Recent Application in this class:
#1
20250207582
2025-06-26

POSITIVE DISPLACEMENT PUMP WITH PRESSURE RELIEF

 #2
20250012275
2025-01-09

Gerotor Pump And Motor/Pump Unit

 #3
20240352930
2024-10-24

POSITIVE DISPLACEMENT PUMP WITH PRESSURE RELIEF

 #4
20240200555
2024-06-20

VOLUME EXPANSION FOR CAVITATION REDUCTION IN A GEAR PUMP MESH

 #5
20230119471
2023-04-20

Positive displacement pump with pressure relief

 #6
20220074408
2022-03-10

Gear pump with floating bearing with receiver faces

 #7
20210332817
2021-10-28

POSITIVE DISPLACEMENT PUMP WITH PRESSURE RELIEF

 #8
20210239137
2021-08-05

System to pump fluid and control thereof

 #9
20200300243
2020-09-24

Enhancing fluid flow in gerotor systems

 #10
20200277952
2020-09-03

Gear pump for venting trapped volume

 #11
20200191142
2020-06-18

OIL PUMP

 #12
20200088191
2020-03-19

Gerotor pump and method of making pressure equalization in a gerotor pump

 #13
20200032789
2020-01-30

OIL PUMP

 #14
20190178246
2019-06-13

OIL PUMP

 #15
20190032653
2019-01-31

Internal gear pump

 #16
20190024657
2019-01-24

Pump with bleed mechanism for reducing cavitation

 #17
20190010964
2019-01-10

System to pump fluid and control thereof

 #18
20180372091
2018-12-27

Reduction of cavitation in gear pumps

 #19
20180320685
2018-11-08

Multi-phase pump with cooled liquid reservoir

 #20
20180245585
2018-08-30

Positive displacement pump with pressure relief

 #21
20180202439
2018-07-19

GEAR PUMP WITH DEFLECTOR IN FLUID INTAKE FOR DIVERTING FLUID TOWARDS VOIDS IN HOUSING

 #22
20180172001
2018-06-21

Plate gear pump and hydraulic centering pins

 #23
20180058450
2018-03-01

Gerotor assembly having an oil groove

 #24
20180051695
2018-02-22

Pump for an engine

 #25
20170268507
2017-09-21

Gear pump

 #26
20170234312
2017-08-17

Gear pump with deflector in fluid intake for diverting fluid towards voids in housing

 #27
20170198694
2017-07-13

Gears and gear pumps

 #28
20170198693
2017-07-13

Gear pump

 #29
20170122316
2017-05-04

Gerotor pump for a vehicle

 #30
20160230813
2016-08-11

Metallic insert with smooth contours for use with composite working members

 #31
20160169224
2016-06-16

Gear pump bearing dam

 #32
20160084274
2016-03-24

System to pump fluid and control thereof

 #33
20150219097
2015-08-06

Gear pump including an inner rotor having a plurality of teeth

 #34
20150147211
2015-05-28

Gear pump bearing dam

 #35
20140086779
2014-03-27

Gear machine having a non-circular low-pressure connection

 #36
20130243636
2013-09-19

Fuel pump for an internal combustion engine

 #37
20130039793
2013-02-14

Reduced noise fluid pump

 #38
20120308423
2012-12-06

Oil pump

 #39
20120141316
2012-06-07

Gear root geometry for increased carryover volume

 #40
20120082579
2012-04-05

Internal-gear type fluid device

 #41
20110194968
2011-08-11

Oil pump

 #42
20100158739
2010-06-24

Gear pump with slots in teeth to reduce cavitation

 #43
20100124513
2010-05-20

Gear pump

 #44
20100104463
2010-04-29

Geared hydraulic apparatus

 #45
20100028186
2010-02-04

HYDRAULIC MACHINE

 #46
20090180908
2009-07-16

Oil pump and automatic transmission including the same

 #47
20090148333
2009-06-11

Gear pump cavitation reduction

 #48
20080166254
2008-07-10

Gear pump with pressure relief groove

 #49
20080063554
2008-03-13

PRECISION FLOW GEAR PUMP

 #50
20080025862
2008-01-31

External toothed wheel pump comprising a relieving pocket

 #51
20070292295
2007-12-20

Rotor with cut-outs

 #52
20070237666
2007-10-11

Low noise gear set for gear pump

 #53
20070231179
2007-10-04

Structure for preventing cavitation erosion of oil pump

 #54
20070178003
2007-08-02

GEAR PUMP WITH RIPPLE CHAMBER FOR LOW NOISE AND PRESSURE RIPPLES

 #55
20050271538
2005-12-08

Gear for use in a gear pump

 #56
20050232784
2005-10-20

Pump assembly

 #57
20050123419
2005-06-09

Pumping device

 #58
20050112012
2005-05-26

Gear pump, in particular fuel pump

 #59
17201999
2022-06-21

High volume pump system