ClassID:

143416

F04C2/086 - 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 Carter

Recent Application in this class:
#1
20250297605
2025-09-25

ELECTRIC LIQUID PUMP

#2
20250180016
2025-06-05

Bearing for Pump

#3
20250092872
2025-03-20

OIL PUMP FOR A MOTOR VEHICLE

#4
20240369058
2024-11-07

Single-Entry Screw Pump

#5
20240060489
2024-02-22

PUMP FOR CONVEYING A FLUID

#6
20230184249
2023-06-15

Screw spindle pump

#7
20230033416
2023-02-02

Controlling pressure on a journal bearing

#8
20230032135
2023-02-02

Gear pump or motor with communication paths to suction and discharge in closed space between the drive and driven gears

#9
20220412351
2022-12-29

Pump

#10
20220381240
2022-12-01

Oil pump with straightening member branching the suction passage

#11
20220307499
2022-09-29

Electric pump

#12
20220307496
2022-09-29

Electric pump including a motor unit and an axially extending attachment surface

#13
20220065246
2022-03-03

Rotary pump with rotor bearing ring

#14
20210317828
2021-10-14

External gear pump integrated with two independently driven prime movers

#15
20210293237
2021-09-23

Momentum Pump Apparatus

#16
20210148364
2021-05-20

Pump end plate manufacturing method and pump

#17
20210095663
2021-04-01

Gear pump

#18
20200362860
2020-11-19

Compact dual-section gear pump

#19
20200300202
2020-09-24

Fuel pump and fuel delivery unit

#20
20200248684
2020-08-06

External gear pump integrated with two independently driven prime movers

#21
20200080547
2020-03-12

Scroll compressor

#22
20190360484
2019-11-28

Connection assembly with feed pump and elastic element

#23
20190301455
2019-10-03

Rotary pump with a lubricant feed connecting a rotor bearing and a radial sealing gap

#24
20190301451
2019-10-03

Hybrid pump bearing for contamination resistance

#25
20190277171
2019-09-12

Rotary pump with supporting pockets

#26
20190120228
2019-04-25

Scavenge pump with improved lubrication

#27
20190107108
2019-04-11

REMANUFACTURING A TRANSMISSION PUMP ASSEMBLY

#28
20180340533
2018-11-29

Pump drive for conveying a reducing agent for motor vehicle exhaust gas systems, modular motor and pump family for forming different pump drives with several such electric motors

#29
20180291893
2018-10-11

Threaded spindle machine

#30
20180223835
2018-08-09

Wear-resistant coating for oil pump cavity

#31
20180202439
2018-07-19

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

#32
20180172001
2018-06-21

Plate gear pump and hydraulic centering pins

#33
20180119695
2018-05-03

Gear pump and method for realising it

#34
20180112659
2018-04-26

Fuel pump

#35
20180023562
2018-01-25

External rotor pump with a surface structure having a load-bearing region and a non-load bearing region

#36
20180003173
2018-01-04

Internal gear pump

#37
20170370338
2017-12-28

Fuel pump

#38
20170334212
2017-11-23

Gear pump and printing apparatus provided with same

#39
20170321704
2017-11-09

Electric pump

#40
20170306950
2017-10-26

Rotary pump comprising a lubricating groove in the sealing stay

#41
20170284391
2017-10-05

Electric oil pump, in particular for a motor vehicle

#42
20170254329
2017-09-07

Elastic containment assembly for a pump

#43
20170234312
2017-08-17

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

#44
20170204854
2017-07-20

External gear pump integrated with two independently driven prime movers

#45
20170184098
2017-06-29

Container assembly for a pump

#46
20170175736
2017-06-22

Gear pump with end plates or bearings having spiral grooves

#47
20170130714
2017-05-11

Remanufacturing a transmission pump assembly

#48
20170082105
2017-03-23

Pump provided with a system for compensating the internal pressure

#49
20170058894
2017-03-02

Pump with shaped face seal

#50
20170002810
2017-01-05

Trochoid pump for transferring high-viscosity liquid under high pressure

#51
20160369795
2016-12-22

Variable delivery external gear machine

#52
20160305425
2016-10-20

Fluid pump

#53
20160303864
2016-10-20

Gear pump and printing apparatus provided with same

#54
20160298624
2016-10-13

Fluid pump

#55
20160298623
2016-10-13

Internal gear pump with improved communication between inlet and idler and between inlet and rotor

#56
20160169225
2016-06-16

Hydraulic device

#57
20160169224
2016-06-16

Gear pump bearing dam

#58
20160084123
2016-03-24

Oil pump, engine cover and engine comprising the same

#59
20160069345
2016-03-10

Internal gear pump including a separating piece

#60
20160046271
2016-02-18

Pre-assemblage internal gear pump

#61
20160032969
2016-02-04

Gear pump bearings with hybrid pads

#62
20160025091
2016-01-28

Pump system

#63
20160009264
2016-01-14

Internal gear pump

#64
20150337835
2015-11-26

Pump

#65
20150308428
2015-10-29

Gear machine with eccentricity at the gearwheels

#66
20150285246
2015-10-08

Variable displacement oil pump

#67
20150285244
2015-10-08

Oil pump, engine cover and engine comprising the same

#68
20150275929
2015-10-01

Pump device and hydraulic actuator

#69
20150274141
2015-10-01

Internal gear pump for a hydraulic vehicle brake system

#70
20150260183
2015-09-17

High pressure gear pump with dual wall housing

#71
20150219097
2015-08-06

Gear pump including an inner rotor having a plurality of teeth

#72
20150204325
2015-07-23

Internal gear pump

#73
20150147211
2015-05-28

Gear pump bearing dam

#74
20150132172
2015-05-14

Pump device having a micro pump and bearing member for a micro pump

#75
20150097339
2015-04-09

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

#76
20150086403
2015-03-26

Internal-gear pump and hydraulic circuit for a motor vehicle drivetrain

#77
20150071804
2015-03-12

Variable flow hydraulic machine

#78
20150071796
2015-03-12

Structure of a ventilated passage for ventilating the inside of the motor of an electric pump apparatus

#79
20150064038
2015-03-05

Internal gear pump

#80
20150050174
2015-02-19

Rotary piston pump with optimised inlets and outlets

#81
20150037193
2015-02-05

Oil return passage structure for oil pump

#82
20150030488
2015-01-29

Gear pump

#83
20140377114
2014-12-25

Internal gear pump

#84
20140341757
2014-11-20

Oil pump for vehicle and vehicle with the same

#85
20140308150
2014-10-16

Gear pump having grooved mounting adapter

#86
20140271311
2014-09-18

Internal gear pump with axial disk and intermediate piece

#87
20140147303
2014-05-29

Power steering pumping apparatus for vehicle

#88
20140117748
2014-05-01

Rotary pump and braking system having the same

#89
20140112813
2014-04-24

Hydraulic motor

#90
20140079578
2014-03-20

Electric pump

#91
20140037487
2014-02-06

Gerotor device roller pocket geometry

#92
20140023545
2014-01-23

Inlet cutbacks for high speed gear pump

#93
20140003987
2014-01-02

Aircraft main engine fuel pump with multiple gear stages using shared journals

#94
20130330222
2013-12-12

Method for producing the tooth shape of the inner and outer ring of an annular gear machine and toothed ring produced by means of said method

#95
20130315770
2013-11-28

Pump assembly for a vehicle

#96
20130294940
2013-11-07

Magnetically driven pump arrangement having a micropump with forced flushing, and operating method

#97
20130236348
2013-09-12

Rotary piston pump and casing half-shells for same

#98
20130202474
2013-08-08

Rotary lobe pump having inlet and outlet aligned with gearbox casing

#99
20130183182
2013-07-18

Stator of a gerotor device and a method for manufacturing roller pockets in a stator of a gerotor device

#100
20130064702
2013-03-14

Downhole motors and pumps with asymmetric lobes

#101
20130028778
2013-01-31

Stator of a gerotor device and a method for manufacturing roller pockets in a stator of a gerotor device

#102
20130004356
2013-01-03

Geared hydraulic machine

#103
20120315177
2012-12-13

Engine oil pump including plunge pool to mitigate surge noise

#104
20120315175
2012-12-13

Double internal gear pump

#105
20120305603
2012-12-06

Liquid gear pump

#106
20120288395
2012-11-15

Screw spindle machine and method of manufacturing the same

#107
20120269668
2012-10-25

Polymeric External Gear Pump for Hot Cooking Oil

#108
20120258006
2012-10-11

External Gear Pump for Hot Cooking Oil

#109
20120252335
2012-10-04

Meat processing assembly

#110
20120252334
2012-10-04

Meat processing assembly

#111
20120252333
2012-10-04

Meat processing assembly

#112
20120252332
2012-10-04

MEAT PROCESSING ASSEMBLY

#113
20120252331
2012-10-04

MEAT PROCESSING ASSEMBLY

#114
20120207638
2012-08-16

Rotary piston pump having converging inlet and outlet openings for conveying a fluid medium containing solids

#115
20120171061
2012-07-05

Gear pump

#116
20120148426
2012-06-14

Gear pump

#117
20120141315
2012-06-07

External Gear Pump

#118
20120128514
2012-05-24

Pumps and pump-heads with separately removable field-serviceable portion

#119
20120128513
2012-05-24

Electric pump unit

#120
20120082581
2012-04-05

Gear pump with fluid communication portion

#121
20120076683
2012-03-29

Structure of Variable Oil Pump

#122
20110158841
2011-06-30

Screw Pump with Anti-Turbulent Structure

#123
20110129364
2011-06-02

Electric pump and electric pump mounting structure

#124
20110097980
2011-04-28

Meat processing assembly

#125
20110062773
2011-03-17

Pump assembly

#126
20110042484
2011-02-24

Liquid sprayer

#127
20110014078
2011-01-20

Oil pump including rotors that change eccentric positional relationship one-to another to adjust a discharge amount

#128
20100322810
2010-12-23

PUMP ASSEMBLY FOR SYNCHRONOUS PRESSURIZATION OF TWO FLUID CIRCUITS

#129
20100278676
2010-11-04

Gear wheel pump

#130
20100247362
2010-09-30

Gear Pump

#131
20100239449
2010-09-23

Gear pump having optimal axial play

#132
20100237689
2010-09-23

Gear pump and gear pump for brake apparatus

#133
20100233007
2010-09-16

Gear pump

#134
20100215538
2010-08-26

Fuel pump

#135
20100215537
2010-08-26

Gear pump with improved inlet port

#136
20100150765
2010-06-17

Interlocking device for holding body and flange of machines using bean-shaped dowels

#137
20100150764
2010-06-17

Pump having modular shaft bearings and seals

#138
20100135837
2010-06-03

Pump Casing

#139
20100124513
2010-05-20

Gear pump

#140
20100047102
2010-02-25

Gear pump with reduced pressure pulsations on the pumping side

#141
20100034680
2010-02-11

Rotary piston machine

#142
20090304540
2009-12-10

PD pumps with a common gearbox module and varying capacities and easy access to mechanical seals

#143
20090269234
2009-10-29

Vane cell pump and impeller having a chamber wall with a projecting web

#144
20090191078
2009-07-30

Lubricating system for aircraft drive

#145
20090180908
2009-07-16

Oil pump and automatic transmission including the same

#146
20090175751
2009-07-09

Electric pump with relief valve

#147
20090148333
2009-06-11

Gear pump cavitation reduction

#148
20090110584
2009-04-30

High pressure telescoping gear pumps and motors

#149
20090041593
2009-02-12

VARIABLE DISPLACEMENT TYPE GEAR PUMP

#150
20080267794
2008-10-30

Hydraulic pump system with integrated distributor valve

#151
20080240968
2008-10-02

Low Cost Gear Fuel Pump

#152
20080240945
2008-10-02

Motor/Pump Unit

#153
20080199340
2008-08-21

Screw displacement pump

#154
20080145259
2008-06-19

Oil pump and method of assembling the oil pump

#155
20080138220
2008-06-12

Hydraulic pump of automatic transmission

#156
20080107557
2008-05-08

Oil pump having rotor receiving portion for restriction moving range of an outer rotor in a direction perpendicular to an eccentric direction

#157
20080080997
2008-04-03

Screw compressor

#158
20080069707
2008-03-20

Positive displacement pump apparatus and method

#159
20080056887
2008-03-06

HYDRAULIC GEAR MOTOR WITH INTEGRATED FILTER

#160
20080044308
2008-02-21

Gear pump

#161
20080017437
2008-01-24

Internal gear pump and power steering device

#162
20070264148
2007-11-15

Gear pump arrangement with erosion resistant insert

#163
20070264144
2007-11-15

Extruder system with integrated gear pump

#164
20070259199
2007-11-08

Oil pump

#165
20070243091
2007-10-18

Pump rotor seal apparatus and method

#166
20070231169
2007-10-04

Gear pump and method of producing the same

#167
20070224062
2007-09-27

Oil pump structure of transmission

#168
20070128062
2007-06-07

Eccentric screw pump having conical sealing surfaces

#169
20070025866
2007-02-01

Fluid pump assembly

#170
20060292024
2006-12-28

Internal gear pump in combustion engine

#171
20060254860
2006-11-16

Mounting structure of oil pump

#172
20060193741
2006-08-31

Gear pump and holding element therefor

#173
20060140811
2006-06-29

Gear pump having optimal axial play

#174
20060140810
2006-06-29

Motor-mounted internal gear pump and electronic device

#175
20060140793
2006-06-29

Offset-drive magnetically driven gear-pump heads and gear pumps comprising same

#176
20060140790
2006-06-29

G-rotor pump

#177
20060112907
2006-06-01

Oil pump assembly

#178
20060093507
2006-05-04

Rotary pump for braking device

#179
20060073060
2006-04-06

Oil pump

#180
20060051230
2006-03-09

Hydraulic pump for a power steering system

#181
20060031997
2006-02-16

Method for extracting nylon from waste materials

#182
20060024188
2006-02-02

Gear pump

#183
20060024187
2006-02-02

Hydraulic pump

#184
20050265860
2005-12-01

Motor-mounted internal gear pump and electronic device

#185
20050254970
2005-11-17

Quick connect pump to pump mount and drive arrangement

#186
20050238505
2005-10-27

Gear pump and liquid injection apparatus

#187
20050232789
2005-10-20

Motor/pump unit, especially for antislip brake systems

#188
20050220633
2005-10-06

Fuel pump gasket

#189
20050196301
2005-09-08

Gear pump and liquid injection apparatus

#190
20050196300
2005-09-08

Pump

#191
20050186089
2005-08-25

Electric pump

#192
20050169779
2005-08-04

Progressing cavity pump

#193
20050169773
2005-08-04

Oil pump for an automatic transmission of a motor vehicle

#194
20050163643
2005-07-28

Synchronized transaxle hydraulic motor

#195
20050147518
2005-07-07

Gear pump with gears having curved teeth and method of feeding elastomeric material

#196
20050106055
2005-05-19

Rotary positive displacement hydraulic machines

#197
20050106053
2005-05-19

Oil pump

#198
20050106044
2005-05-19

Oil pump

#199
20050095160
2005-05-05

Pump

#200
20050088041
2005-04-28

Housing including shock valves for use in a gerotor motor

#201
20050084366
2005-04-21

Suction housing for rotor/stator pump

#202
20050081366
2005-04-21

Method for assembling precision miniature bearings for minisystems and microsystems

#203
20050063851
2005-03-24

Gerotor pumps and methods of manufacture therefor

#204
20050058557
2005-03-17

Multiple tank fluid pumping system using a single pump

#205
20050022381
2005-02-03

Method of making gear pump