ClassID:

143455

F04C2/3442 - CPC Classification

Classification description:

Rotary-piston machines or pumps having the characteristics covered by two or more groups , , , or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups or and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the inner and outer member being in contact along one line or continuous surface substantially parallel to the axis of rotation the surfaces of the inner and outer member, forming the working space, being surfaces of revolution

Recent Application in this class:
#1
20250172068
2025-05-29

Bidirectional Rotary Hydraulic Motor and Pump

#2
20240369060
2024-11-07

Variable Displacement Oil Pump

#3
20240191625
2024-06-13

Bidirectional rotary hydraulic motor and pump

#4
20240011485
2024-01-11

VALVELESS DEVICES FOR PULSATILE FLUID FLOW

#5
20230358228
2023-11-09

Rotary vane pump

#6
20230136689
2023-05-04

PUMP WITH VARIABLE SUCTION/DISCHARGE AMOUNT AND DRIVE DEVICE COMPOSED OF THE PUMP AND DRIVING METHOD THEREOF

#7
20230032977
2023-02-02

Rotary pump comprising a setting structure spring having an offset line of action

#8
20220307497
2022-09-29

Variable displacement lubricant pump having a radial inlet or outlet opening axially between at least two bushing rings

#9
20220266948
2022-08-25

Hydraulic automatic transmission bicycle

#10
20220235766
2022-07-28

VARIABLE DISPLACEMENT LUBRICANT PUMP

#11
20220228588
2022-07-21

Variable displacement lubricant pump

#12
20210355941
2021-11-18

Dual drive vane pump

#13
20210324854
2021-10-21

PUMP APPARATUS

#14
20210293238
2021-09-23

Reduced-noise rotary pump

#15
20210246899
2021-08-12

Rotary pump having an adjustable specific delivery volume and a pressure equalization surface

#16
20210115920
2021-04-22

Flow-optimised vane pump

#17
20210048025
2021-02-18

Vaned pump device having fluid pressure chambers located outside the cam ring to control cam ring eccentricity

#18
20200400142
2020-12-24

Automotive variable mechanical lubricant pump

#19
20200340478
2020-10-29

Vane pump with improved seal assembly for control chamber

#20
20200340474
2020-10-29

Vane cell pump comprising a pressure equalization connection

#21
20200340473
2020-10-29

Vane pump

#22
20200309120
2020-10-01

Variable displacement oil pump slide with bow spring

#23
20200300092
2020-09-24

Variable lubricant vane pump

#24
20200284254
2020-09-10

Pulsation phenomenon suppression mechanism of pump device

#25
20200256335
2020-08-13

Variable displacement lubricant vane pump

#26
20200248686
2020-08-06

Pressure relief valve integrated in pivot pin of pump

#27
20200172199
2020-06-04

Hydraulic automatic transmission bicycle

#28
20200080555
2020-03-12

Variable Displacement Pump

#29
20200072216
2020-03-05

ADAPTIVE PIVOT FOR VARIABLE DISPLACEMENT VANE PUMP

#30
20200032793
2020-01-30

Variable displacement pump

#31
20200032791
2020-01-30

SPRING STRUCTURE WITH SLIDING ELEMENT

#32
20190338771
2019-11-07

VARIABLE DISPLACEMENT PUMP

#33
20190277280
2019-09-12

PUMP DEVICE

#34
20190264685
2019-08-29

Rotary device having a circular guide ring

#35
20190219144
2019-07-18

Cam liner for integrated drive generator

#36
20190154036
2019-05-23

Pump unit with integrated piston pump and electric motor

#37
20190145410
2019-05-16

Pump sleeve for integrated drive generator

#38
20190017596
2019-01-17

Hydraulic control apparatus and hydraulic control method

#39
20180372093
2018-12-27

WATER PUMP

#40
20180230803
2018-08-16

Vane pump and determining method for inner profile of cam ring composing thereof

#41
20180223840
2018-08-09

Variable capacity oil pump

#42
20180163543
2018-06-14

VANE PUMP WITH ONE OR MORE LESS RESTRICTED VANES

#43
20180106252
2018-04-19

Vane spacing for a variable displacement oil pump

#44
20180010605
2018-01-11

Variable displacement vane pump with thermo-compensation

#45
20170306948
2017-10-26

Multiple Pressure Variable Displacement Pump with Mechanical Control

#46
20170291661
2017-10-12

Hydraulic automatic transmission bicycle

#47
20170268508
2017-09-21

Vane having surfaces with different material properties in a rotary pump

#48
20170234311
2017-08-17

Variable displacement pump

#49
20170198730
2017-07-13

Hydraulic apparatus

#50
20170167484
2017-06-15

Pump exhibiting an adjustable delivery volume

#51
20170138197
2017-05-18

Vane cell machine having a pressure piece which delimits two pressure chambers

#52
20170089233
2017-03-30

Vane oil pump

#53
20160377080
2016-12-29

Vane cell machine with centric bore in ring insert in side wall

#54
20160230756
2016-08-11

Vehicle hydraulic supply apparatus

#55
20160138592
2016-05-19

Variable lubricant vane pump

#56
20160115832
2016-04-28

Variable displacement lubricant pump

#57
20160069346
2016-03-10

Variable displacement vane pump with thermo-compensation

#58
20160047280
2016-02-18

Lubricant vane pump

#59
20160040665
2016-02-11

Hydraulic conveying device and hydraulic system

#60
20160017884
2016-01-21

Variable displacement vane pump having connection groove communicating with suction-side back pressure port thereof

#61
20160003243
2016-01-07

Variable displacement lubricant pump

#62
20150369240
2015-12-24

Vane pump with multiple control chambers

#63
20150352638
2015-12-10

Method for producing a vane for a rotary vane pump, vane for a rotary vane pump and rotary vane pump

#64
20150330388
2015-11-19

Lubricant vane pump

#65
20150300352
2015-10-22

Pump with mechanical seal assembly

#66
20150292503
2015-10-15

VANE PUMPS AND METHODS OF OPERATING SAME

#67
20150285246
2015-10-08

Variable displacement oil pump

#68
20150252803
2015-09-10

Variable displacement pump

#69
20150240809
2015-08-27

Variable displacement pump

#70
20150240808
2015-08-27

Variable displacement vane pump

#71
20150218983
2015-08-06

Variable-capacity oil pump and oil supply system using same

#72
20150204326
2015-07-23

Vane pump unit

#73
20150139846
2015-05-21

Blade-type fluid transmission device

#74
20150132169
2015-05-14

Positive displacement pump having axial movement coupling and rotational decoupling

#75
20150125331
2015-05-07

Displacement pump having fluidly connected pressure chambers

#76
20150110659
2015-04-23

Vane pump

#77
20150078946
2015-03-19

Vane pump

#78
20150078944
2015-03-19

Variable displacement vane pump

#79
20150064044
2015-03-05

Gas compressor for reducing oscillation in a housing thereof

#80
20150044083
2015-02-12

Variable capacity type vane pump

#81
20150037188
2015-02-05

Vane pump assembly

#82
20150030485
2015-01-29

Variable displacement rotary pump and displacement regulation method

#83
20150027686
2015-01-29

Crude Oil Lifting System and Method Utilizing Vane Pump for Conveying Fluid

#84
20150020759
2015-01-22

Variable displacement pump

#85
20150017046
2015-01-15

Rotary compressor having gate axially movable with respect to rotor

#86
20150010421
2015-01-08

Sealing Element for Rotary Compressor

#87
20140326911
2014-11-06

Valve device for a hydraulic circuit, and oil-pump regulating arrangement

#88
20140294647
2014-10-02

Pre-compression dual spring pump control

#89
20140241927
2014-08-28

Vane-type hydraulic device having vane formed with engaging groove

#90
20140219847
2014-08-07

Variable displacement oil pump

#91
20140178231
2014-06-26

First and second pumps in a common housing with parallel flow

#92
20140170008
2014-06-19

Variable displacement pump

#93
20140161645
2014-06-12

Gas pump with a sealing oil groove

#94
20140147323
2014-05-29

Variable displacement pump

#95
20140119969
2014-05-01

Vane pump

#96
20140093398
2014-04-03

ELECTRIC MACHINE INCLUDING A SHAFT HAVING A PUMP VANE

#97
20140072456
2014-03-13

Variable displacement pump

#98
20140030130
2014-01-30

Sliding vane pump

#99
20140030120
2014-01-30

Variable displacement lubricant pump with a pressure control valve having a preload control arrangement

#100
20130309114
2013-11-21

Sliding vane positive displacement pump having a fixed disc configuration to reduce slip paths

#101
20130309113
2013-11-21

Multiple stage passive variable displacement vane pump

#102
20130266466
2013-10-10

Blade-type fluid transmission device

#103
20130263815
2013-10-10

Variable displacement lubricant pump

#104
20130251584
2013-09-26

Variable displacement pump

#105
20130216419
2013-08-22

Vane pump

#106
20130202468
2013-08-08

Oval chamber vane pump

#107
20130195705
2013-08-01

Vane pump with multiple control chambers

#108
20130136644
2013-05-30

Oil pump for vehicle

#109
20130112174
2013-05-09

Fuel delivery device

#110
20130078127
2013-03-28

Vane cell pump with vane plate guide crosspieces and synchronization cylinder

#111
20130048099
2013-02-28

Additive proportioning system

#112
20130039790
2013-02-14

Variable displacement lubricant pump

#113
20130034460
2013-02-07

Variable Displacement Vane Pump

#114
20130028770
2013-01-31

Variable displacement pump

#115
20130017112
2013-01-17

Control circuit for transmission variable displacement pump with improved efficiency

#116
20130014498
2013-01-17

Variable displacement hydraulic pump control

#117
20120315171
2012-12-13

Method and device for adjusting the compression in a vane cell pump

#118
20120301342
2012-11-29

Variable displacement vane pump having multiple dampening springs

#119
20120257962
2012-10-11

POSITIVE DISPLACEMENT PUMP

#120
20120251342
2012-10-04

Control system and method for pump output pressure control

#121
20120224956
2012-09-06

PUMP APPARATUS

#122
20120213655
2012-08-23

Oil Pump

#123
20120207639
2012-08-16

Rotary compressor having gate axially movable with respect to rotor

#124
20120183426
2012-07-19

Variable-displacement lubricant pump

#125
20120156077
2012-06-21

CAM LINER PROFILE

#126
20120138011
2012-06-07

Lubrication circuit layout

#127
20120051955
2012-03-01

Integrated electric vane oil pump

#128
20120034125
2012-02-09

Vane pump with improved rotor and vane extension ring

#129
20110268595
2011-11-03

Variable capacity vane pump

#130
20110165008
2011-07-07

Device for branching off a fluidic partial flow

#131
20110142703
2011-06-16

Variable displacement vane pump

#132
20110123379
2011-05-26

Variable displacement pump

#133
20110097231
2011-04-28

Variable displacement vane pump

#134
20110085921
2011-04-14

Apparatus having control valve and variable capacitance pump and hydraulic pressure circuit of internal combustion engine in which the same apparatus is used

#135
20100303660
2010-12-02

Variable capacity vane pump

#136
20100296956
2010-11-25

VARIABLE DISPLACEMENT PUMPS AND VANE PUMP CONTROL SYSTEMS

#137
20100282204
2010-11-11

Variable displacement vane pump

#138
20100232989
2010-09-16

Variable displacement oil pump

#139
20100226799
2010-09-09

Variable displacement pump

#140
20100205952
2010-08-19

Variable displacement pump and power steering apparatus using the variable displacement pump

#141
20100150763
2010-06-17

Rotary pump with sliding crescentoid rotor bodies

#142
20100139611
2010-06-10

Hydraulic pump with variable flow and pressure and improved open-loop electric control

#143
20100135835
2010-06-03

Variable-displacement vane oil pump

#144
20100135102
2010-06-03

Method and a device for plasticizing and transporting polymer material based on elongation rheology

#145
20100086424
2010-04-08

Direct control variable displacement vane pump

#146
20100080724
2010-04-01

Two stage pressure regulation system for variable displacement hydraulic pumps

#147
20100037602
2010-02-18

Variable displacement pump

#148
20100028171
2010-02-04

Control system and method for pump output pressure control

#149
20100015001
2010-01-21

Vane pump

#150
20090291010
2009-11-26

Vane pump with housing end wall having an annular groove and a pressure groove that communicate via a curved connecting groove

#151
20090291008
2009-11-26

Variable displacement vane pump

#152
20090291000
2009-11-26

Variable displacement vane pump

#153
20090285709
2009-11-19

Vane pump

#154
20090285707
2009-11-19

Variable capacity pump with dual springs

#155
20090269234
2009-10-29

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

#156
20090269233
2009-10-29

Variable displacement vane pump

#157
20090269232
2009-10-29

Variable displacement vane pump with enhanced discharge port

#158
20090257901
2009-10-15

Power steering pump having intake channels with enhanced flow characteristics and/or a pressure balancing fluid communication channel

#159
20090257899
2009-10-15

Variable displacement vane pump

#160
20090238709
2009-09-24

Magnetic vane ejection for a rotary vane air motor

#161
20090238707
2009-09-24

VANE PUMP

#162
20090208352
2009-08-20

Dual rotor oil pump of an engine with balance weight arrangement

#163
20090202375
2009-08-13

Continuously variable displacement vane pump and system

#164
20090196780
2009-08-06

Variable displacement vane pump with dual control chambers

#165
20090180904
2009-07-16

Pump apparatus

#166
20090162232
2009-06-25

Vane pump

#167
20090136374
2009-05-28

Vane pump with coated vanes

#168
20090129960
2009-05-21

Variable displacement vane pump with defined cam profile

#169
20090120405
2009-05-14

System with a compressor and with a consumer in a motor vehicle

#170
20090102135
2009-04-23

Front cover of manual rotary pump

#171
20090087334
2009-04-02

Sliding Vane Compression and Expansion Device

#172
20090081064
2009-03-26

Rotary compressor having gate axially movable with respect to rotor

#173
20090081063
2009-03-26

Rotary fluid-displacement assembly

#174
20090081052
2009-03-26

Variable displacement pump

#175
20090077964
2009-03-26

Rotary vane engine system

#176
20090074598
2009-03-19

Variable capacity vane pump with force reducing chamber on displacement ring

#177
20090053088
2009-02-26

Reduced rotor assembly diameter vane pump

#178
20090047147
2009-02-19

VARIABLE DISPLACEMENT VANE PUMP

#179
20090047141
2009-02-19

Variable displacement vane pump

#180
20080308062
2008-12-18

Variable displacement pump

#181
20080304961
2008-12-11

Noise Reduced Variable Displacement Vane Pump

#182
20080253913
2008-10-16

Vane pump

#183
20080247894
2008-10-09

Vane pump using line pressure to directly regulate displacement

#184
20080247882
2008-10-09

Split-pressure dual pump hydraulic fluid supply system for a multi-speed transmission and method

#185
20080232978
2008-09-25

VARIABLE DISPLACEMENT VANE PUMP

#186
20080219875
2008-09-11

Magnetic drive vane pump

#187
20080219874
2008-09-11

Variable displacement vane pump

#188
20080219873
2008-09-11

Vane pump having a labyrinth seal and gap between a top surface of a rotor and a ceiling surface of a rotor chamber that is formed between upper and lower cases

#189
20080187446
2008-08-07

Pressure regulating variable displacement vane pump

#190
20080175724
2008-07-24

Vane pump with substantially constant regulated output

#191
20080145260
2008-06-19

Vane Pump with Moveable Sleeve

#192
20080138198
2008-06-12

Vane pump with blade base members

#193
20080118384
2008-05-22

Vane pump having vanes with a cutout portion

#194
20080118381
2008-05-22

Variable displacement vane pump and method of manufacturing the same

#195
20080118372
2008-05-22

Variable displacement vane pump

#196
20080107554
2008-05-08

Pump control using overpressure source

#197
20080099270
2008-05-01

Variable displacement pump

#198
20080069704
2008-03-20

Pumping system

#199
20080038117
2008-02-14

Pumping System Employing a Variable-Displacement Vane Pump

#200
20080029461
2008-02-07

Proportioning, Regenerative, Rotary Pump

#201
20070234996
2007-10-11

Adjusting device, in particular for a motor vehicle

#202
20070231161
2007-10-04

Pump with Selectable Outlet Pressure

#203
20070212243
2007-09-13

Variable displacement vane pump and method of controlling the same

#204
20060280635
2006-12-14

Arrangement and method for the mixing of particulate filling such as pieces of nougat or fruit into consumer ice mass

#205
20060137536
2006-06-29

Dividing device

#206
20060104823
2006-05-18

Hydraulic pump with variable flow and variable pressure and electric control

#207
20060099102
2006-05-11

Vane pump having vanes slanted relative to rotational axis

#208
20060099100
2006-05-11

Cam ring bearing for fuel delivery system

#209
20050254984
2005-11-17

Shared slot vane pump

#210
20050254983
2005-11-17

Rotary pistons

#211
20050232785
2005-10-20

Device for adjusting the pumping capacity of a lubricant pump for an internal combustion engine

#212
20050214155
2005-09-29

Sealing features for a pump and ink jet printer mounting the pump

#213
20050214153
2005-09-29

Rotary vane pump

#214
20050214152
2005-09-29

Rotary vane pump

#215
20050129528
2005-06-16

Variable displacement vane pump with variable target regulator

#216
20050047938
2005-03-03

Variable displacement pump with a suction area groove for pushing out rotor vanes

#217
18074817
2024-04-09

Bidirectional rotary hydraulic motor and pump

#218
14669284
2018-10-30

Vane heat engine