ClassID:

146359

F15B2211/50536 - CPC Classification

Classification description:

Circuits for servomotor systems; Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using unloading valves controlling the supply pressure by diverting fluid to the return line

Recent Application in this class:
#1
20260117802
2026-04-30

INTERMEDIATE HYDRAULIC SYSTEM AND METHOD OF USE

#2
20250376993
2025-12-11

HYDRAULIC DRIVE DEVICE

#3
20250297688
2025-09-25

HYDRAULIC FLUID RELEASE VALVE ASSEMBLIES

#4
20240360849
2024-10-31

Hydraulic system for rotary implement

#5
20240301899
2024-09-12

System and Method for Controlling a Mobile Agricultural Machine Having a Hydraulic Supply System

#6
20240301661
2024-09-12

Work Machine

#7
20240110631
2024-04-04

Unloading valve assembly for compressed air processing system in a commercial vehicle

#8
20230213031
2023-07-06

Hydraulic control system for linear actuation

#9
20230167628
2023-06-01

Hydraulic control circuit

#10
20220228609
2022-07-21

Power transfer unit with breakout friction reduction and leakage reduction

#11
20220186794
2022-06-16

Actuation method for a hydraulic system with a pump and multiple valves, and hydraulic system

#12
20220117161
2022-04-21

Windrower variable rate header floatation system

#13
20220074170
2022-03-10

Construction machine

#14
20210190102
2021-06-24

Compressed-air supply system for operating a pneumatic installation, method and vehicle

#15
20210093991
2021-04-01

Arrangement for a utility vehicle

#16
20200165797
2020-05-28

Dynamic open center hydraulic system control

#17
20200158143
2020-05-21

Hydraulic system

#18
20200103040
2020-04-02

System and method for protecting a pressure vessel from excessive differential pressure

#19
20190219072
2019-07-18

Downhole tractor comprising two or more hydrualic supply lines

#20
20190093756
2019-03-28

Hydraulic system for a transmission of a motor vehicle

#21
20190061459
2019-02-28

Compressed air supply system

#22
20190048896
2019-02-14

Hydraulic component, combination made from hydraulic components, and hydraulic system comprising at least one such hydraulic component or combination

#23
20190030976
2019-01-31

Pneumatic circuit for passenger car pneumatic suspension system

#24
20180355968
2018-12-13

Operating method for a hydraulic system of an automatic transmission

#25
20180327082
2018-11-15

Hydraulic actuation system

#26
20180258614
2018-09-13

Hydraulic distributor with valve device with active discharge in load sensing circuits

#27
20180180066
2018-06-28

Apparatus and methods for the control of hydraulic actuators

#28
20180142445
2018-05-24

Electro-hydraulic feed delivery system

#29
20180127949
2018-05-10

HYDRAULIC CIRCUIT AND WORKING MACHINE

#30
20180080507
2018-03-22

Drain valve

#31
20180051689
2018-02-22

Modular multi-pump system with pressure control

#32
20180002007
2018-01-04

Duplicated hydraulic circuit with pressure regulation

#33
20170361919
2017-12-21

Propeller blade angle control system

#34
20170284064
2017-10-05

Construction machine

#35
20170227028
2017-08-10

Hydraulic drive system for working machine

#36
20170218985
2017-08-03

Reducing noise double-channel oil pump

#37
20170129300
2017-05-11

Compressed-air supply system, pneumatic system and method for operating a compressed-air supply system

#38
20170030347
2017-02-02

Dual mode fuel pump system

#39
20160341168
2016-11-24

Hydrostatic drive system

#40
20160319739
2016-11-03

Engine

#41
20160161956
2016-06-09

Automated relief valve control system and method

#42
20160131162
2016-05-12

Hydraulic control system for controlling a moveable device

#43
20160069447
2016-03-10

Hydraulic circuit for the transmissions of industrial and agricultural vehicles

#44
20160024749
2016-01-28

Hydraulic shovel

#45
20150330415
2015-11-19

Hydraulic drive system for construction machine

#46
20150316079
2015-11-05

Control valve and system with primary and auxiliary function control

#47
20150292644
2015-10-15

Balanced electronically controlled pressure regulating valve

#48
20150204054
2015-07-23

Hydraulic drive system for construction machine

#49
20150176611
2015-06-25

Load sensing electric-proportional multi-way valve

#50
20150176226
2015-06-25

Drive system, in particular for a self-propelled construction machine, in particular a soil compactor

#51
20150168089
2015-06-18

Fluid cooler bypass system for an agricultural work vehicle

#52
20150107699
2015-04-23

Valve for valve assembly

#53
20150047928
2015-02-19

Lubrication system for tool

#54
20150000752
2015-01-01

Fluid pressure regulating system

#55
20140369866
2014-12-18

Hydraulic drive device for cargo handling vehicle

#56
20140331659
2014-11-13

Industrial vehicle and method for controlling industrial vehicle

#57
20140322045
2014-10-30

Engine overload prevention using a speed differential operated relief valve

#58
20140196793
2014-07-17

Hydraulic control apparatus and method

#59
20140178167
2014-06-26

Rotation control device and construction machine including rotation control device

#60
20140116546
2014-05-01

Regulator valve with axial vent

#61
20140116038
2014-05-01

Hydraulic system with open loop electrohydraulic pressure compensation

#62
20140083085
2014-03-27

Hydraulic drive and hydraulically operable working tool

#63
20140076440
2014-03-20

Electro-hydraulic interactive double feedback loop

#64
20140060020
2014-03-06

Hydraulic control system having over-pressure protection

#65
20140048255
2014-02-20

Automated relief valve control system and method

#66
20140023523
2014-01-23

Closed loop drive circuit with external brake assist

#67
20140010688
2014-01-09

Hydraulic circuit for controlling booms of construction equipment

#68
20130333367
2013-12-19

Hydraulic circuit for pipe layer

#69
20130220425
2013-08-29

Flow sensing based variable pump control technique in a hydraulic system with open center control valves

#70
20130167521
2013-07-04

Industrial vehicle

#71
20130145757
2013-06-13

Hydraulic control system

#72
20130139918
2013-06-06

Hydraulic system and hydraulic distributor for the actuating working machines

#73
20130047834
2013-02-28

Selectable hydraulic flow control circuit

#74
20120220426
2012-08-30

Charge bypass system for engine start

#75
20120199765
2012-08-09

Valve assembly

#76
20120152377
2012-06-21

FLUID BYPASS VALVE SYSTEM

#77
20120131912
2012-05-31

Aircraft actuator hydraulic system

#78
20120124989
2012-05-24

Hydraulic Power Unit With Auto-Load Sensing

#79
20120090690
2012-04-19

Method and device for controlling a hydraulic system

#80
20110204267
2011-08-25

Hydraulic valve arrangement

#81
20110173964
2011-07-21

Hydraulic drive system for construction machine

#82
20110154816
2011-06-30

Fluid bypass system

#83
20110011071
2011-01-20

Hydraulic system

#84
20100167873
2010-07-01

Engine control device, and its control method

#85
20100132349
2010-06-03

Hydraulic drive, in particular for machine tools, and method for controlling the hydraulic drive

#86
20100100274
2010-04-22

Safety device for hydraulic working machine

#87
20100084588
2010-04-08

Deepwater Hydraulic Control System

#88
20100084152
2010-04-08

Percussion device actuated by a pressurized non-compressible fluid

#89
20100078089
2010-04-01

Hydraulic trip unit for a valve unit in a prime mover plant, especially for a fast-acting shut-off valve of a turbine plant

#90
20090158725
2009-06-25

Hydraulic pump with control system

#91
20090113887
2009-05-07

Hydraulic Drive Device

#92
20090100829
2009-04-23

Hydraulic catapult drive

#93
20090053078
2009-02-26

Hydraulic control system

#94
20090044527
2009-02-19

Hydraulic control system

#95
20080282691
2008-11-20

Pressure-compensating directional control valve

#96
20080245222
2008-10-09

Hydraulic valve arrangement

#97
20080223030
2008-09-18

Hydraulic driving device for operating machine

#98
20080223026
2008-09-18

Hydraulic power management system

#99
20080152513
2008-06-26

HYDRAULIC CIRCUIT ARRANGEMENT WITH RECOVERY OF ENERGY

#100
20080010982
2008-01-17

Control Valve for a Servo Steering System

#101
20070277519
2007-12-06

Lifting gear valve arrangement

#102
20070217898
2007-09-20

Access method and apparatus that limit motion according to load and position

#103
20070199315
2007-08-30

Apparatus and methods for actuation

#104
20070193259
2007-08-23

Hydraulic apparatus, system and method for positioning an engine exhaust flow control valve

#105
20070145314
2007-06-28

Modular valve system

#106
20070137192
2007-06-21

Circuit arrangement

#107
20070101711
2007-05-10

Servo-motor controlled hydraulic press, hydraulic actuator, and methods of positioning various devices

#108
20070095060
2007-05-03

Hydraulic pressure supply unit

#109
20070095059
2007-05-03

Hydraulic system having pressure compensated bypass

#110
20070071609
2007-03-29

Digital pump with multiple outlets

#111
20070056437
2007-03-15

Hydraulic control system for construction vehicle, particularly excavators

#112
20070025176
2007-02-01

Batch mixer

#113
20070017364
2007-01-25

Hydraulic control unit for the arms of a grip and grip including said hydraulic unit

#114
20060277905
2006-12-14

Hydraulic control device of industrial machinery

#115
20060249016
2006-11-09

Hydraulic circuit and its valve gear

#116
20060236688
2006-10-26

Hydraulic circuit

#117
20060233633
2006-10-19

Hydraulic system for an industrial vehicle

#118
20060191262
2006-08-31

Hydraulic control valve system with electronic load sense control

#119
20060157660
2006-07-20

Hydraulic system having at least one hydraulic valve for actuating a component

#120
20060102241
2006-05-18

Suspension device

#121
20060048824
2006-03-09

Controllable solenoid valve

#122
20060042250
2006-03-02

Safety circuit for media-operated consumers and process for its operation

#123
20060006041
2006-01-12

Device for the optimization of hydraulically controlled engagement of clutches used in marine transmissions

#124
20050284144
2005-12-29

Conduit loss compensation for a distributed electrohydraulic system

#125
20050204736
2005-09-22

Hydraulic control device for working machine

#126
20050204735
2005-09-22

Hydraulic control system for working machine

#127
20050198950
2005-09-15

Hydraulic lifting device for battery-operated industrial trucks

#128
20050178116
2005-08-18

Hydraulic control system using load-sensing technology

#129
20050109026
2005-05-26

Open hydraulic circuit including a relief valve device

#130
20050072474
2005-04-07

Valve assembly for attenuating bounce of hydraulically driven members of a machine

#131
20050071064
2005-03-31

Signal processing system for construction machine

#132
20050045028
2005-03-03

Regulated pressure supply for a variable-displacement reversible hydraulic motor

#133
15922129
2020-02-04

Electronically controlled pressure relief valve system