ClassID:

146251

F15B2211/30515 - CPC Classification

Classification description:

Circuits for servomotor systems; Directional control characterised by the type of valves; Non-return valves, i.e. check valves Load holding valves

Recent Application in this class:
#1
20260028797
2026-01-29

HYDRAULIC MACHINE SWING SYSTEM WITH ANTI-DRIFT

#2
20250361883
2025-11-27

HYDRAULIC SYSTEM

#3
20240384732
2024-11-21

Actuating Device for at Least One Fluidically Drivable Consumer

#4
20240271640
2024-08-15

FLUID PRESSURE CONTROL DEVICE

#5
20240218887
2024-07-04

Method for hydraulically lowering tools onto a surface of an object

#6
20240150161
2024-05-09

Working equipment with capabilities of preventing buckling of hydraulic cylinder

#7
20240141932
2024-05-02

Hydraulic arrangement with load-holding function and hydraulic arrangement control method

#8
20240044344
2024-02-08

HYDRAULIC VALVE ASSEMBLY

#9
20240035491
2024-02-01

Hydraulic valve assembly

#10
20240011511
2024-01-11

Valve

#11
20230213031
2023-07-06

Hydraulic control system for linear actuation

#12
20230139226
2023-05-04

Controller and method for hydraulic apparatus

#13
20230055316
2023-02-23

Device for holding a stem of a hydraulic cylinder in position, and method for unblocking and blocking a secondary check valve of the device

#14
20230035122
2023-02-02

Power units with manual override controls for hydraulic systems

#15
20220299046
2022-09-22

Spool valve and hydraulic apparatus including the same

#16
20220170241
2022-06-02

Flow control valve

#17
20220025910
2022-01-27

SELF-CONTAINED ENERGY EFFICIENT HYDRAULIC ACTUATOR SYSTEM

#18
20220003253
2022-01-06

Power units with manual override controls for hydraulic systems

#19
20210372085
2021-12-02

Drift-prevention valve device, blade device, and working machine

#20
20210341001
2021-11-04

Pilot control mechanism for boom bounce reduction

#21
20200378409
2020-12-03

VALVE DEVICE

#22
20200362890
2020-11-19

Power units with manual override controls for hydraulic systems

#23
20200248720
2020-08-06

Hydraulic system and method for reducing boom bounce with counter-balance protection

#24
20200096015
2020-03-26

Apparatus for controlling a hydraulic machine

#25
20200063761
2020-02-27

Hydraulic drive device for cargo vehicle

#26
20200048919
2020-02-13

Large manipulator and hydraulic circuit arrangement for a large manipulator

#27
20200032820
2020-01-30

Pilot control mechanism for boom bounce reduction

#28
20200018329
2020-01-16

Apparatus for controlling a hydraulic machine

#29
20200003239
2020-01-02

Methods and apparatus to enable boom bounce reduction and prevent un-commanded motion in hydraulic systems

#30
20200003238
2020-01-02

Power units with manual override controls for hydraulic systems

#31
20190390419
2019-12-26

Gangway having position locking assembly

#32
20190337775
2019-11-07

Crane hydraulic control system and crane

#33
20190169009
2019-06-06

Power lift

#34
20190161983
2019-05-30

Large manipulator with decentralized hydraulic system

#35
20190119934
2019-04-25

Electrohydraulic control circuit for a large manipulator

#36
20190106306
2019-04-11

Brake device for braking a hydraulic motor of a turning body in a working machine

#37
20190063015
2019-02-28

Gangway having position locking assembly

#38
20180371719
2018-12-27

System and method for hydraulic actuator lock valve

#39
20180266447
2018-09-20

Pump-controlled hydraulic circuits for operating a differential hydraulic actuator

#40
20180180072
2018-06-28

Safe-to-operate hydraulic drive

#41
20180156243
2018-06-07

Hydraulic system and method for reducing boom bounce with counter-balance protection

#42
20180148159
2018-05-31

Latch pin assembly

#43
20180112682
2018-04-26

Electropneumatic positioner and a field device having an electro-pneumatic positioner

#44
20180100525
2018-04-12

Load sensing hydraulic system for a working machine, and a method for controlling a load sensing hydraulic system

#45
20170204886
2017-07-20

Methods and apparatus to enable boom bounce reduction and prevent un-commanded motion in hydraulic systems

#46
20170204883
2017-07-20

Control device for zero-leak directional control valves

#47
20170184139
2017-06-29

Method of controlling velocity of a hydraulic actuator in over-center linkage systems

#48
20170184136
2017-06-29

Hydraulic drive system for operation table

#49
20170159263
2017-06-08

Valve unit for a quick-changer and quick-change system

#50
20170002545
2017-01-05

Hydraulic system for work machine

#51
20160333903
2016-11-17

Hydraulic system having regeneration and hybrid start

#52
20160298660
2016-10-13

Pilot control mechanism for boom bounce reduction

#53
20160230900
2016-08-11

Valve device

#54
20160207608
2016-07-21

Latch pin assembly for folding wing tip system

#55
20160195111
2016-07-07

Fluid pressure control apparatus

#56
20160178069
2016-06-23

Valve connected to a feed circuit, a feed circuit comprising such a valve and a feeding method operating such a feed circuit

#57
20160108936
2016-04-21

Hydraulic system and method for reducing boom bounce with counter-balance protection

#58
20160102686
2016-04-14

Hydraulic system for construction equipment

#59
20160102685
2016-04-14

Self-contained energy efficient hydraulic actuator system

#60
20160091004
2016-03-31

Method for controlling pressure in a hydraulic actuator

#61
20160084271
2016-03-24

Method to detect hydraulic valve failure in hydraulic system

#62
20160084270
2016-03-24

Electrohydraulic control circuit

#63
20160076558
2016-03-17

Method of increasing electro-hydrostatic actuator piston velocity

#64
20160032947
2016-02-04

Construction machine

#65
20150369262
2015-12-24

Fluid pressure control device

#66
20150308463
2015-10-29

Smooth control of hydraulic actuator

#67
20150300380
2015-10-22

Lifting device

#68
20150275927
2015-10-01

Electro-hydrostatic actuator deceleration rate control system

#69
20150267718
2015-09-24

System preventing pressured oil leakage to cylinder line in control valve systems with flow divider

#70
20150152887
2015-06-04

Fail-safe actuation system

#71
20150096291
2015-04-09

Fluid pressure control device

#72
20150075640
2015-03-19

Pneumatic valve assembly and method

#73
20150052888
2015-02-26

Hydraulic system

#74
20150013796
2015-01-15

Hydraulic circuit for automatic transmission

#75
20150013322
2015-01-15

Fluid pressure control device

#76
20140350731
2014-11-27

Driver self-tuning method using electro-hydraulic actuator system

#77
20140245734
2014-09-04

Hybrid excavator having a system for reducing actuator shock

#78
20140245732
2014-09-04

Proportional directional control valve, and hydraulic circuit and hydropneumatic suspension system having such a valve

#79
20140230643
2014-08-21

Actuator displacement measurement system in electronic hydraulic system of construction equipment

#80
20140033698
2014-02-06

METERLESS HYDRAULIC SYSTEM HAVING FORCE MODULATION

#81
20140033697
2014-02-06

METERLESS HYDRAULIC SYSTEM HAVING FORCE MODULATION

#82
20140026969
2014-01-30

Fail-safe actuation system

#83
20140010688
2014-01-09

Hydraulic circuit for controlling booms of construction equipment

#84
20130298541
2013-11-14

Load energy assist and horsepower management system

#85
20130247750
2013-09-26

Electro-hydraulic pilot operated relief valve

#86
20130098464
2013-04-25

Closed-loop hydraulic system having regeneration configuration

#87
20130081384
2013-04-04

Meterless hydraulic system having pump protection

#88
20130048117
2013-02-28

Meterless hydraulic system having displacement control valve

#89
20130047834
2013-02-28

Selectable hydraulic flow control circuit

#90
20130047599
2013-02-28

Meterless hydraulic system having load-holding bypass

#91
20130047592
2013-02-28

Meterless hydraulic system having restricted primary makeup

#92
20120240566
2012-09-27

Hydraulic controller

#93
20120152629
2012-06-21

HYDRAULIC SYSTEM HAVING LOAD LOCK VALVE

#94
20120133200
2012-05-31

Brake system and method

#95
20120085601
2012-04-12

Shut-off valve for hydraulic system

#96
20110174393
2011-07-21

Proportional valve assembly

#97
20110162744
2011-07-07

Device for piloting by means of a substantially incompressible fluid

#98
20110120297
2011-05-26

Hydraulic Circuit

#99
20110023477
2011-02-03

Hydrostatic circuit lock valve components, circuits, systems, and method

#100
20110011257
2011-01-20

ELECTRO-HYDRAULIC ACTUATOR HAVING END CAP WITH SPLIT BUSHING

#101
20100276023
2010-11-04

Valve system for drilling systems

#102
20100096576
2010-04-22

VALVE BLEED SYSTEM

#103
20100090143
2010-04-15

Dual locking valve

#104
20100083651
2010-04-08

Circuit for controlling a double-action hydraulic drive cylinder

#105
20090287373
2009-11-19

Control system for a work machine and method for controlling a hydraulic cylinder

#106
20090250646
2009-10-08

Fluid control valve

#107
20090241765
2009-10-01

Holding control valve

#108
20090145123
2009-06-11

Hydraulic circuit having holding valve of external pilot pressure operation type

#109
20090100829
2009-04-23

Hydraulic catapult drive

#110
20090056531
2009-03-05

Lifting mechanism, and method for triggering a lifting mechanism

#111
20080302099
2008-12-11

Method for controlling a hydraulic cylinder and control system for a work machine

#112
20080295505
2008-12-04

Method for springing a movement of an implement of a work machine

#113
20080295504
2008-12-04

Method for controlling a hydraulic cylinder in a work machine

#114
20080294316
2008-11-27

Method for controlling a hydraulic cylinder in a work machine and control system for a work machine

#115
20080292474
2008-11-27

Method for controlling a hydraulic machine in a control system

#116
20080224073
2008-09-18

Hydraulic valve arrangement

#117
20080152513
2008-06-26

HYDRAULIC CIRCUIT ARRANGEMENT WITH RECOVERY OF ENERGY

#118
20080141669
2008-06-19

Device for increasing pressure in cylinders with control unit

#119
20070166168
2007-07-19

CONTROL SYSTEM FOR A WORK MACHINE AND METHOD FOR CONTROLLING A HYDRAULIC CYLINDER IN A WORK MACHINE

#120
20070044647
2007-03-01

Hydraulic switching mechanism for longwall supports

#121
20070017364
2007-01-25

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

#122
20060162544
2006-07-27

Hydraulic control arrangement

#123
20050276709
2005-12-15

Hydraulic actuating device

#124
20050247188
2005-11-10

Hydraulic control valve having holding valve with improved response characteristics

#125
20050242310
2005-11-03

Control valve apparatus and pressure circuit

#126
20050199295
2005-09-15

Electrohydraulic control device

#127
16246924
2020-05-12

Proportional fluid flow control valve configured to generate a pressure-boosted pilot fluid signal

#128
16246921
2020-09-15

Proportional fluid flow control valve having a built-in check valve and configured to generate a pilot signal