ClassID:

143119

F04B49/002 - CPC Classification

Classification description:

Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups  -  Hydraulic systems to change the pump delivery

Recent Application in this class:
#1
20260117761
2026-04-30

VARIABLE DISPLACEMENT PUMP AND METHOD FOR REGULATING SUCH PUMP

#2
20250389267
2025-12-25

SOLENOID CONCEPT FOR PUMP CONTROL OF A VARIABLE DISPLACEMENT PISTON PUMP

#3
20250223951
2025-07-10

HYDRAULIC AXIAL PISTON UNIT AND METHOD FOR CONTROLLING OF A HYDRAULIC AXIAL PISTON UNIT

#4
20250172131
2025-05-29

Method with a Hydraulic Pressure Medium Supply Arrangement, and Hydraulic Pressure Medium Supply Arrangement

#5
20250146515
2025-05-08

Method for Operating an Axial Piston Machine in Which a Zero Case is Taken into Account

#6
20250146495
2025-05-08

Flexible Pump Assembly for Use in a Fan Drive

#7
20250084840
2025-03-13

MEDICAL FLUID THERAPY MACHINE INCLUDING READILY ACCESSIBLE PNEUMATIC MANIFOLD AND VALVES THEREFORE

#8
20250052237
2025-02-13

FLOW RATE DISTRIBUTION METHOD AND APPARATUS, AND OPERATION MACHINE

#9
20250051004
2025-02-13

HYDRAULIC CONTROL CIRCUIT FOR CONTROLLING FAN BLADE PITCH

#10
20250027515
2025-01-23

ELECTROHYDRAULIC CONTROL DEVICE AND ADJUSTABLE HYDRAULIC PUMP SYSTEM

#11
20240392775
2024-11-28

DIRECT CONTROLLED VARIABLE DISPLACEMENT PUMPS WITH THERMOSTATICALLY CONTROLLED BYPASS

#12
20240392773
2024-11-28

DIRECT CONTROLLED VARIABLE DISPLACEMENT VALVES WITH DUAL SET POINT PRESSURE RELIEF

#13
20240287971
2024-08-29

Method for Determining Control Model Parameters of a Control Model of an Axial Piston Pump

#14
20240263628
2024-08-08

MULTI-PHASE FLUID PUMP SYSTEM

#15
20240241526
2024-07-18

HIGH TURN DOWN RATIO DIRECT CONTROL FOR VARIABLE DISPLACEMENT PUMPS WITH FLOW SENSING

#16
20240240631
2024-07-18

DIRECT CONTROL FOR VARIABLE DISPLACEMENT PUMPS

#17
20240218861
2024-07-04

NEUTRAL SETTING DEVICE OF AN ADJUSTABLE HYDRAULIC UNIT

#18
20240209850
2024-06-27

A MEMBRANE-BASED PISTON PUMP AND A HOMOGENISING APPARATUS COMPRISING THE MEMBRANE-BASED PISTON PUMP

#19
20240200553
2024-06-20

VARIABLE DISPLACEMENT PUMP WITH BACK-UP

#20
20240167467
2024-05-23

LONGITUDINAL IMPEDANCE PUMP

#21
20240052816
2024-02-15

ADJUSTING DEVICE FOR AN AXIAL PISTON MACHINE

#22
20240003344
2024-01-04

HYDROSTATIC VARIABLE DISPLACEMENT AXIAL PISTON UNIT AND DISPLACEMENT VOLUME SETTING DEVICE

#23
20240003341
2024-01-04

DISPLACEMENT CONTROL FOR HYDRAULIC PUMP

#24
20230304468
2023-09-28

SERVO SYSTEM BOLTED ON DESIGN

#25
20230279879
2023-09-07

Electrohydraulic control device and adjustable hydraulic pump system

#26
20230193886
2023-06-22

HYDRAULIC PUMP

#27
20230175500
2023-06-08

Control apparatus and method for controlling a volume flow of a fluid in a drive train of a motor vehicle

#28
20230151806
2023-05-18

Variable displacement hydraulic pump

#29
20230130997
2023-04-27

Variable displacement pumps

#30
20230125840
2023-04-27

Variable displacement pumps

#31
20230105578
2023-04-06

Variable positive displacement pump actuator systems

#32
20230041899
2023-02-09

Electrohydraulic proportional pressure control for open circuit pump

#33
20220381232
2022-12-01

Neutral setting device of an adjustable hydraulic unit

#34
20220372967
2022-11-24

On-demand dual variable displacement positive displacement pumping system

#35
20220235801
2022-07-28

Control valve with optimized cross-section

#36
20220154715
2022-05-19

Pump displacement control device having a feedback lever

#37
20210388830
2021-12-16

Demand based hydraulic pump control system

#38
20210317827
2021-10-14

Control arrangement for variable displacement pump

#39
20210317825
2021-10-14

Gas compressor and system and method for gas compressing

#40
20210270258
2021-09-02

Electric motor pump system and method

#41
20210270257
2021-09-02

Multi-phase fluid pump system

#42
20210239103
2021-08-05

Apparatus for conveying thick matter

#43
20210180588
2021-06-17

Reciprocating compressor-expander

#44
20210164501
2021-06-03

Hydraulic axial piston unit and method for controlling of a hydraulic axial piston unit

#45
20210148354
2021-05-20

Control of a high-pressure compressor

#46
20210148352
2021-05-20

Method of controlling the hydraulic fluid pressure of a diaphragm compressor

#47
20210115910
2021-04-22

Torque control system for a variable displacement pump

#48
20210047928
2021-02-18

Variable displacement hydraulic unit and method for operating the hydraulic unit

#49
20210040944
2021-02-11

ELECTRIC DISPLACEMENT CONTROL FOR AN OPEN CIRCUIT VARIABLE DISPLACEMENT PUMP

#50
20210025374
2021-01-28

Hydraulic Pressurizing Medium Supply Assembly, and Method

#51
20210025373
2021-01-28

Electrohydraulic proportional pressure control for open circuit pump

#52
20210015986
2021-01-21

Medical fluid therapy machine including readily accessible pneumatic manifold and valves therefore

#53
20200332781
2020-10-22

Hydraulic pressure amplifier

#54
20200309116
2020-10-01

Method for operating a piston compressor, and piston compressor

#55
20200263675
2020-08-20

Displacement adjusting device of swash plate pump

#56
20200256332
2020-08-13

Variable pre and de-compression control mechanism and method for hydraulic displacement pump

#57
20200256326
2020-08-13

Hydraulic pump control system

#58
20200248553
2020-08-06

Displacement control with angle sensor adjustment

#59
20200191131
2020-06-18

Flexible supply gas routing for gas compressors

#60
20200124040
2020-04-23

Gas compressor and system and method for gas compressing

#61
20200103037
2020-04-02

Regulating device for pump pressure and pump volumetric flow rate, having concentric control slide valves

#62
20200095987
2020-03-26

Control apparatus for supplying at least one hydraulic consumer with fluid

#63
20200072205
2020-03-05

Hydrostatic positive displacement machine

#64
20200056580
2020-02-20

Manual displacement control arrangement for an axial piston pump

#65
20200032801
2020-01-30

Method for operation control of compressor and the compressor

#66
20200025193
2020-01-23

Method for operating a hydraulic consumer on an electrically actuated control valve

#67
20190353150
2019-11-21

Hydraulic pump with swash plate tilt control

#68
20190309737
2019-10-10

Viscous material pump with adjustable limitation of the delivery pressure

#69
20190277275
2019-09-12

Electro-hydraulic swashplate control arrangement for an axial piston pump

#70
20190257304
2019-08-22

Hydraulic drive system of construction machine

#71
20190178242
2019-06-13

Hydraulic drive

#72
20190145389
2019-05-16

Adjusting device for an axial piston machine

#73
20190101136
2019-04-04

Hydraulic arrangement

#74
20190040851
2019-02-07

Multiphase production boost method and system

#75
20190032652
2019-01-31

Gas compressor and system and method for gas compressing

#76
20180372088
2018-12-27

HYDRAULIC VALVE DEVICE WITH MULTIPLE WORKING SECTIONS WITH PUMP CONTROL SYSTEM

#77
20180355986
2018-12-13

Control valve

#78
20180335056
2018-11-22

Electronically controlled valve, hydraulic pump, and hydraulic pump system

#79
20180328350
2018-11-15

Variable displacement pump

#80
20180306011
2018-10-25

Hydraulic oil well pumping system, and method for pumping hydrocarbon fluids from a wellbore

#81
20180291932
2018-10-11

Motor soft shift feature

#82
20180291797
2018-10-11

Hydraulic system for maintaining minimum low side pressure of closed circuit hydraulic system

#83
20180274564
2018-09-27

Hydraulic circuit for use on CVT vehicle

#84
20180258963
2018-09-13

Hydraulic rotary actuator with built-in mechanical position feedback

#85
20180258744
2018-09-13

Systems and methods for operating a linear motor to prevent impacts with hard stops

#86
20180230978
2018-08-16

Electrohydraulic proportional pressure control for open circuit pump

#87
20180216613
2018-08-02

Single-sensor analysis system

#88
20180209413
2018-07-26

HYDRAULIC ACTUATOR WITH PRESSURE-BASED PISTON POSITION FEEDBACK

#89
20180202427
2018-07-19

Method and control device for operating a reciprocating piston pump

#90
20180202421
2018-07-19

RADIAL PISTON PUMPS AND MOTORS

#91
20180195500
2018-07-12

Cryogenic fluid pump

#92
20180195254
2018-07-12

Apparatus and method for controlling construction machine

#93
20180149150
2018-05-31

Variable displacement pump and a method for regulating the pump

#94
20180149145
2018-05-31

High pressure generator with bidirectional check valves controlling overpressure

#95
20180135609
2018-05-17

Air-conditioner compressor for vehicle

#96
20180135605
2018-05-17

Method for operating an axial piston machine of swashplate design

#97
20180100593
2018-04-12

Fluid control spool

#98
20180073497
2018-03-15

Gas compressor and system and method for gas compressing

#99
20180045185
2018-02-15

Torque control system for a variable displacement pump

#100
20180038365
2018-02-08

Gas compressor and system and method for gas compressing

#101
20180030978
2018-02-01

Gas compressor and system and method for gas compressing

#102
20180016881
2018-01-18

Systems and methods for operating a linear motor to prevent impacts with hard stops

#103
20180002007
2018-01-04

Duplicated hydraulic circuit with pressure regulation

#104
20170356471
2017-12-14

Hydrostatic displacement unit with reduced hysteresis

#105
20170306590
2017-10-26

Hydraulic drive system of construction machine

#106
20170276124
2017-09-28

Variable displacement axial piston pump with fluid controlled swash plate

#107
20170268658
2017-09-21

Hydraulic system of vehicle transmission device

#108
20170252911
2017-09-07

HYDRAULIC PUMP FOR A HYDRODYNAMIC COMPRESSION TOOL

#109
20170234311
2017-08-17

Variable displacement pump

#110
20170198730
2017-07-13

Hydraulic apparatus

#111
20170184090
2017-06-29

RECIPROCATING WATER PUMP

#112
20170058921
2017-03-02

Automatic oil spill detection system

#113
20170058876
2017-03-02

Hydraulic pump port plate with variable area metering notch

#114
20170030344
2017-02-02

End of stroke detection for plunger velocity correction

#115
20170009753
2017-01-12

Radial piston pump assemblies and use thereof in hydraulic circuits

#116
20160341193
2016-11-24

System for estimating a displacement of a pump

#117
20160332509
2016-11-17

Fluid delivery system

#118
20160245272
2016-08-25

Water pump control system

#119
20160177683
2016-06-23

Hydraulic oil well pumping system, and method for pumping hydrocarbon fluids from a wellbore

#120
20160160852
2016-06-09

Multiphase production boost method and system

#121
20160138711
2016-05-19

Booster device comprising a hydraulic motor driving a booster pump

#122
20160131130
2016-05-12

Power unit of hydraulic pumping unit and corresponding hydraulic pumping unit

#123
20160115947
2016-04-28

Construction machine

#124
20160002887
2016-01-07

Construction machine

#125
20150377223
2015-12-31

Hydraulic swash block positioning system

#126
20150361996
2015-12-17

Hybrid hydraulic systems for industrial processes

#127
20150337813
2015-11-26

Pump volume control apparatus

#128
20150330271
2015-11-19

Valve device for a hydraulic circuit and oil pump regulating arrangement

#129
20150314058
2015-11-05

Diaphragm repositioning for pressure pod using position sensing

#130
20150292499
2015-10-15

HYDRAULICALLY CONTROLLED HYDROSTATIC TRANSMISSION

#131
20150252809
2015-09-10

External automatic control smart air pump

#132
20150240800
2015-08-27

Oil-well-pump driving hydraulic system

#133
20150240799
2015-08-27

Method and apparatus for pumping fluid

#134
20150182769
2015-07-02

FIRE SUPRESSION SYSTEM

#135
20150139824
2015-05-21

PUMP CONTROL APPARATUS

#136
20150132426
2015-05-14

Hydraulic drive circuit with parallel architectured accumulator

#137
20150118072
2015-04-30

PUMPING SYSTEM

#138
20150098839
2015-04-09

Pump Systems and Methods

#139
20150082780
2015-03-26

Drive system for hydraulically driven working mechanisms of a working machine

#140
20150050165
2015-02-19

Control unit for hydraulic variable displacement pumps and variable displacement pump with a control unit

#141
20150033728
2015-02-05

Hydrostatic drive, in particular hydrostatic fan drive

#142
20150017021
2015-01-15

METHOD FOR OPERATING A HYDRAULIC PUMP ARRANGEMENT, AND HYDRAULIC PUMP ARRANGEMENT

#143
20150017020
2015-01-15

Offline filtration device and method

#144
20140373726
2014-12-25

System for supplying a pressurized liquid, method for supplying a pressurized liquid using said system, and machine for preparing beverages that includes said system

#145
20140367966
2014-12-18

Oil sand slurry transportation system and method for variable slurry flow rates

#146
20140328700
2014-11-06

Swash plate pump having control pins in series

#147
20140311139
2014-10-23

Hydrostatic variable displacement pump which can be set in either direction of displacement

#148
20140294618
2014-10-02

Hydraulic pressure supply system of automatic transmission

#149
20140261716
2014-09-18

Systems and methods for fluid pump outlet pressure regulation

#150
20140244087
2014-08-28

Oil pump controlling system of hybrid vehicle and method thereof

#151
20140212301
2014-07-31

Electric Motorcycle

#152
20140205468
2014-07-24

Transfer case utilizing an on-demand centrifugally governed hydraulic power supply to perform both range shift and on-demand four wheel drive

#153
20140202566
2014-07-24

Auxiliary device for an agricultural working machine

#154
20140161627
2014-06-12

System and method for controlling motion profile of pistons

#155
20140150415
2014-06-05

Energy recovery hydraulic system

#156
20140147323
2014-05-29

Variable displacement pump

#157
20140103233
2014-04-17

Hydraulic valve arrangement and hydraulic machine arrangement having a valve arrangement of this kind

#158
20140099212
2014-04-10

Automatic oil spill detection system

#159
20140086759
2014-03-27

Hydraulic Power System for HVAC Compressor

#160
20140072456
2014-03-13

Variable displacement pump

#161
20140064990
2014-03-06

Hydraulic pressure supply system of automatic transmission

#162
20140060677
2014-03-06

Hydraulic pressure supply system of automatic transmission

#163
20140060676
2014-03-06

Hydraulic pressure supply system of automatic transmission

#164
20140010667
2014-01-09

Device and method for uptake or release of a liquid

#165
20130330207
2013-12-12

Aircraft motor drive control apparatus and aircraft actuator hydraulic system

#166
20130318971
2013-12-05

Power source apparatus and hybrid construction machine equipped with same

#167
20130318957
2013-12-05

Fluid control system for work vehicle

#168
20130298546
2013-11-14

Work vehicle

#169
20130294929
2013-11-07

Method for controlling a refilling motor that drives a hydraulic pump

#170
20130272900
2013-10-17

Method and device for controlling an auxiliary pump for a transmission

#171
20130239796
2013-09-19

Hydrostatic axial piston machine

#172
20130213026
2013-08-22

Drive control method of operating machine

#173
20130209284
2013-08-15

Hydraulic dual axial piston machine

#174
20130205987
2013-08-15

Hydraulic axial piston machine

#175
20130199631
2013-08-08

Pressure/flow regulator

#176
20130180247
2013-07-18

Electro-hydraulic drive system for a work machine

#177
20130180237
2013-07-18

Hydraulic transmission circuit with multiple capacities

#178
20130160873
2013-06-27

Pressure-regulating arrangement with a pressure-regulating valve and hydraulic circuit therefor

#179
20130098022
2013-04-25

Control device for a hydraulic pump of construction machinery

#180
20120315170
2012-12-13

AIR CONDITIONING COMPRESSOR FOR A VEHICLE AND VEHICLE

#181
20120301322
2012-11-29

Use of wattmeter to obtain diagnostics of hydraulic system during transient-state start-up operation

#182
20120282115
2012-11-08

Method, apparatus, and computer-readable storage medium for controlling torque load of multiple variable displacement hydraulic pumps

#183
20120263604
2012-10-18

Hydraulic pump control apparatus and method of construction machine

#184
20120227391
2012-09-13

Device and method for controlling hydraulic pump of construction machinery

#185
20120185141
2012-07-19

Work vehicle and work vehicle control method

#186
20120141298
2012-06-07

Oil sand slurry transportation system and method for variable slurry flow rates

#187
20120141297
2012-06-07

Oil pump controlling system of hybrid vehicle and method thereof

#188
20120134849
2012-05-31

Character parameters obtaining method for displacement control mechanism of hydraulic pump and detecting device for carrying out the method

#189
20120131913
2012-05-31

Hydraulic swing-controlling apparatus of work machine

#190
20120097022
2012-04-26

PUMP UNIT

#191
20120093968
2012-04-19

HYDRAULIC DRIVE CIRCUIT WITH PARALLEL ARCHITECTURED ACCUMULATOR

#192
20120090308
2012-04-19

Hybrid hydraulic systems for industrial processes

#193
20120076676
2012-03-29

Motor driven air compressor and hydraulic pump module

#194
20120034115
2012-02-09

METHOD OF OPERATING A PUMP/MOTOR

#195
20110293439
2011-12-01

Cooling fan driving device and fan rotational speed control method

#196
20110286859
2011-11-24

Pump Controller With External Device Control Capability

#197
20110277624
2011-11-17

Adjustment Device of a Hydrostatic Machine

#198
20110277459
2011-11-17

Hydrostatic drive

#199
20110271829
2011-11-10

Rotary hydraulic machine and controls

#200
20110256000
2011-10-20

Local backup hydraulic actuator for aircraft control systems

#201
20110206537
2011-08-25

Hybrid electro-hydraulic power device

#202
20110185717
2011-08-04

Hydraulic manifold pump

#203
20110146260
2011-06-23

HYDRAULIC SYSTEM HAVING A HYDROSTATIC, VALVE-CONTROLLED PISTON ENGINE

#204
20110138799
2011-06-16

Control system for swashplate pump

#205
20110094213
2011-04-28

Method and apparatus for controlling a pump

#206
20110030363
2011-02-10

Open center hydraulic system

#207
20110008187
2011-01-13

Controller and the use thereof

#208
20100329892
2010-12-30

Hydraulic drive and control system for pumps using a charge pump

#209
20100300084
2010-12-02

Hydrostatic pump

#210
20100293937
2010-11-25

Hydraulic drive with an independent charge pump

#211
20100263362
2010-10-21

Method for controlling a working machine

#212
20100224058
2010-09-09

Regulating device for a hydrostatic piston engine with electronic control unit

#213
20100206161
2010-08-19

Axial piston machine in a swash-plate construction having an adjusting device

#214
20100199838
2010-08-12

HYDRAULIC SYSTEM HAVING AN ADJUSTABLE HYDROSTATIC MACHINE

#215
20100158706
2010-06-24

Pressure change compensation arrangement for pump actuator

#216
20100154398
2010-06-24

Fluid pressure unit

#217
20100132544
2010-06-03

Axial piston machine having a return device

#218
20100050621
2010-03-04

Machine control system having hydraulic warmup procedure

#219
20090304528
2009-12-10

Pump equipment

#220
20090293468
2009-12-03

System and method of controlling torque of plural variable displacement hydraulic pumps

#221
20090269215
2009-10-29

Hydrostatic pump

#222
20090269214
2009-10-29

Hydrostatic pump with a mechanical displacement volume control

#223
20090269213
2009-10-29

Method of controlling a hydraulic system

#224
20090266934
2009-10-29

Hydraulic fluid supply device and electric actuator

#225
20090196767
2009-08-06

Service pack variable displacement pump

#226
20090145122
2009-06-11

Hydraulic drive system

#227
20090133761
2009-05-28

Control valve unit with alternating stop

#228
20090133396
2009-05-28

Hydraulic circuit arrangement with a device for limiting control and method for pressure control by controlling displacement

#229
20090038696
2009-02-12

Drain Safety and Pump Control Device with Verification

#230
20080289326
2008-11-27

Pump unit

#231
20080279700
2008-11-13

Hydraulic drive system with neutral drift compensation

#232
20080279699
2008-11-13

Controller for a variable displacement feed pump

#233
20080277230
2008-11-13

Hydraulic drive system with aggressive clutching

#234
20080271793
2008-11-06

Load-Pressure-Operated Flow Rate Regulator with Vibration Damping

#235
20080202113
2008-08-28

Tandem Pump Unit

#236
20080104954
2008-05-08

Method and system for controlling machine power

#237
20080093092
2008-04-24

Fire suppression system

#238
20080063537
2008-03-13

Speed-related control mechanism for a pump and control method

#239
20080050246
2008-02-28

Fluid system with pump activation device

#240
20080003114
2008-01-03

Drain safety and pump control device

#241
20070151236
2007-07-05

Total power controller

#242
20070098570
2007-05-03

Tandem pump unit

#243
20070098569
2007-05-03

Tandem pump unit

#244
20070028608
2007-02-08

Rotary hydraulic machine and controls

#245
20070017219
2007-01-25

Inclined rotation control device of variable displacement hydraulic pump

#246
20070006581
2007-01-11

Pump unit

#247
20070000245
2007-01-04

Hydraulic motor unit

#248
20060272326
2006-12-07

Pump unit

#249
20060254269
2006-11-16

Power regulating device

#250
20060251526
2006-11-09

Axial piston machine having a fixable slide block on the swash plate

#251
20060225895
2006-10-12

Sprinkler system for converting non-sprinklered buildings

#252
20060196180
2006-09-07

Method of creating feedback control in a closed hydrostatic circuit and a control system therefore

#253
20060174614
2006-08-10

Control devices for swashplate type variable displacement piston pump

#254
20060162988
2006-07-27

Hydraulic steering device for vehicles

#255
20060112686
2006-06-01

Pump unit

#256
20060043787
2006-03-02

Regulator device and a valve unit for a hydraulic pump

#257
20050252369
2005-11-17

Regulating device for hydrostatic piston machines

#258
20050180855
2005-08-18

Pump unit with multiple operation modes

#259
20050172621
2005-08-11

Control valve supply for rotary hydraulic machine

#260
20050160727
2005-07-28

Method and device for controlling pump torque for hydraulic construction machine

#261
20050100447
2005-05-12

Flow control system for a gas turbine engine

#262
20050071064
2005-03-31

Signal processing system for construction machine

#263
20050029484
2005-02-10

Valve block for a control device, particularly for a hydrostatic machine

#264
20050005599
2005-01-13

Hydraulic system having a variable displacement pump

#265
15887817
2020-11-03

Hydraulic systems with variable speed drives