ClassID:

146264

F15B2211/3058 - CPC Classification

Classification description:

Circuits for servomotor systems; Directional control characterised by the type of valves; Assemblies of multiple valves having multiple valves for a single output member, e.g. for creating higher valve function by use of multiple valves like two 2/2-valves replacing a 5/3-valve having additional valves for interconnecting the fluid chambers of a double-acting actuator, e.g. for regeneration mode or for floating mode

Recent Application in this class:
#1
20260078778
2026-03-19

PILOT OPERATED BLOW-OFF VALVES FOR HYDRAULIC ACTUATORS

#2
20260022718
2026-01-22

HYDRAULIC DRIVE DEVICE

#3
20260022712
2026-01-22

HYDRAULIC DRIVE DEVICE

#4
20250376993
2025-12-11

HYDRAULIC DRIVE DEVICE

#5
20250186274
2025-06-12

HYDRAULIC CIRCUIT FOR A PATIENT HANDLING APPARATUS

#6
20250137470
2025-05-01

MOVEMENT CONTROL DEVICE WITH DOUBLE BALANCING

#7
20250116280
2025-04-10

HYDRAULIC DRIVE SYSTEM

#8
20250012299
2025-01-09

PILOT OPERATED BLOW-OFF VALVES FOR HYDRAULIC ACTUATORS

#9
20240401614
2024-12-05

Hydraulic Drive System Having a 2X2Q Pump Unit

#10
20240159253
2024-05-16

ELECTRO-HYDRAULIC ACTUATOR SYSTEMS AND METHODS OF OPERATING THE SAME

#11
20240084823
2024-03-14

Hydraulic excavator drive system

#12
20240052599
2024-02-15

Multi-control valve

#13
20240035491
2024-02-01

Hydraulic valve assembly

#14
20240003120
2024-01-04

Hydraulic control circuit for implement

#15
20230339605
2023-10-26

Hydraulic actuator including a multi-head piston for hydraulic gearing

#16
20230339604
2023-10-26

Hydraulic actuator including a multi-head piston for hydraulic gearing

#17
20230258206
2023-08-17

Hydraulic Regeneration Circuit with Multiple Speeds

#18
20230235755
2023-07-27

HYDRAULIC DRIVE SYSTEM

#19
20230167622
2023-06-01

Work Machine

#20
20230139226
2023-05-04

Controller and method for hydraulic apparatus

#21
20230022248
2023-01-26

Work machine control system, work machine, and work machine control method

#22
20220373004
2022-11-24

Regeneration device, hydraulic drive system equipped with same, and control device therefor

#23
20220356679
2022-11-10

Hydraulic control device for work machine

#24
20220333348
2022-10-20

Work machine

#25
20220106766
2022-04-07

CONTROL UNIT FOR A HYDRAULIC SYSTEM

#26
20220081103
2022-03-17

Failsafe valve for geared rotary actuator

#27
20220071089
2022-03-10

Controlled float on an agricultural harvester for header leveling

#28
20220025910
2022-01-27

SELF-CONTAINED ENERGY EFFICIENT HYDRAULIC ACTUATOR SYSTEM

#29
20210360858
2021-11-25

Regenerative handler raise and gravity lower cylinder

#30
20210254642
2021-08-19

Hydraulic circuit

#31
20210253266
2021-08-19

Manually actuated hydraulic circuit for ram air turbine (RAT) restow

#32
20210246913
2021-08-12

Fluid circuit selection system and fluid circuit selection method

#33
20210246633
2021-08-12

Hydraulic circuit for construction equipment

#34
20210207344
2021-07-08

HYDRAULIC SYSTEM FOR INCREASING OPERATION SPEED OF CONSTRUCTION MACHINERY BOOM

#35
20210108657
2021-04-15

FLUID CIRCUIT FOR AIR CYLINDERS

#36
20210102626
2021-04-08

Hydraulic system of work machine and work machine

#37
20210069892
2021-03-11

Tunable actuator joint modules having energy recovering quasi-passive elastic actuators with internal valve arrangements

#38
20210069891
2021-03-11

Tunable actuator joint modules having energy recovering quasi- passive elastic actuators with internal valve arrangements

#39
20200378409
2020-12-03

VALVE DEVICE

#40
20200299932
2020-09-24

Regeneration valve for a hydraulic circuit

#41
20200224764
2020-07-16

Hydraulic system of work machine and work machine

#42
20200123737
2020-04-23

Hydraulic system of construction machinery

#43
20200063760
2020-02-27

Pressure booster

#44
20200049266
2020-02-13

Pilot operated blow-off valves for hydraulic actuators

#45
20190368519
2019-12-05

HYDRAULIC ACTUATOR

#46
20190352884
2019-11-21

Construction machine

#47
20190309772
2019-10-10

Automatically actuated shunt valve system

#48
20190145542
2019-05-16

Control of supply of air to a pneumatic valve actuator

#49
20190085873
2019-03-21

Electrohydraulic linear actuator

#50
20190063475
2019-02-28

Actuator cooling flow limiter

#51
20190063472
2019-02-28

Low profile electro-hydrostatic actuator

#52
20180355892
2018-12-13

Fluid control valve

#53
20180274568
2018-09-27

Actuating drive for a control valve, in particular steam turbine control valve and method for operating same

#54
20180274328
2018-09-27

Hydraulic metering system for downhole hydraulic actuation

#55
20180251958
2018-09-06

Hydraulic driving apparatus of work machine

#56
20180202467
2018-07-19

Hydraulic drive device and method for controlling the same

#57
20180194000
2018-07-12

Tunable actuator joint modules having energy recovering quasi-passive elastic actuators with internal valve arrangements

#58
20180112684
2018-04-26

Boom control with integrated variable return metering

#59
20180017087
2018-01-18

Hydraulic actuator control circuit

#60
20170276155
2017-09-28

Hydraulic drive system for work machine

#61
20170241454
2017-08-24

Device for recuperation of hydraulic energy and working machine with corresponding device

#62
20170191346
2017-07-06

Apparatus and methods for manual override of hydraulic choke or valve actuators

#63
20170184139
2017-06-29

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

#64
20170159679
2017-06-08

Hydraulic system of work machine and work machine

#65
20170130744
2017-05-11

System and method for hydraulic energy recovery

#66
20170130739
2017-05-11

System and method of hydraulic energy recovery for machine start-stop and machine ride control

#67
20170108014
2017-04-20

Hydraulic system

#68
20170023025
2017-01-26

Apparatus for the energy-optimized hydraulic control of at least one double-action working cylinder

#69
20170002845
2017-01-05

Electro hydrostatic actuators

#70
20170002844
2017-01-05

Electro hydrostatic actuators

#71
20160362871
2016-12-15

Control valve device

#72
20160312444
2016-10-27

Control circuit and control method for boom energy regeneration

#73
20160305455
2016-10-20

Double-loop control system with single hydraulic motor

#74
20160251831
2016-09-01

Flow control valve for construction equipment, having floating function

#75
20160249530
2016-09-01

Hydraulic arrangement for a lifting unit

#76
20160230370
2016-08-11

Hydraulic system and working machine including the same

#77
20160215481
2016-07-28

Control system for hybrid construction machine

#78
20160108933
2016-04-21

Method and system for storing and reusing hydraulic energy

#79
20160102685
2016-04-14

Self-contained energy efficient hydraulic actuator system

#80
20160098045
2016-04-07

Aircraft hydraulic valve

#81
20160084276
2016-03-24

Hydraulic drive with rapid stroke and load stroke

#82
20160076558
2016-03-17

Method of increasing electro-hydrostatic actuator piston velocity

#83
20150377264
2015-12-31

Hydraulic system for construction machinery

#84
20150361998
2015-12-17

Hydraulic system with energy recovery

#85
20150354172
2015-12-10

Hydraulic fluid energy recovery apparatus for work machine

#86
20150322648
2015-11-12

Device and method for controlling flow rate in construction machinery

#87
20150260205
2015-09-17

Void protection system

#88
20150260204
2015-09-17

Cylinder driving apparatus

#89
20150252554
2015-09-10

Hydraulic drive system for construction machine

#90
20150184683
2015-07-02

Actuator

#91
20150184362
2015-07-02

Slewing-type working machine

#92
20150176613
2015-06-25

Hydraulic axle

#93
20150176609
2015-06-25

Control system for hybrid construction machine

#94
20150152894
2015-06-04

Actuator unit

#95
20150121860
2015-05-07

Hydraulic drive circuit

#96
20150107232
2015-04-23

Hydraulic system for controlling a jaw crusher

#97
20150093225
2015-04-02

Device for establishing a float condition in a hydraulically sprung loader lift cylinder arrangement after fluid supply is decoupled

#98
20150082784
2015-03-26

Flushing circuit for hydraulic cylinder drive circuit

#99
20150066313
2015-03-05

Control device and construction machine provided therewith

#100
20150059568
2015-03-05

Hydraulic control circuit with regeneration valve

#101
20150015054
2015-01-15

Transport vehicle

#102
20150007557
2015-01-08

Boom driving device

#103
20140373710
2014-12-25

Four-chamber cylinder for a hydraulic actuating device with emergency function and hydraulic actuating device having this

#104
20140373519
2014-12-25

Electro-hydraulic system with float function

#105
20140366951
2014-12-18

Method for controlling lowering of an implement of a working machine

#106
20140360349
2014-12-11

Hydraulic cylinder for use for example in a hydraulic tool

#107
20140308106
2014-10-16

Void protection system

#108
20140305299
2014-10-16

Telescoping fluid porting tube

#109
20140245734
2014-09-04

Hybrid excavator having a system for reducing actuator shock

#110
20140230926
2014-08-21

Hydraulic safety and movement control system

#111
20140196627
2014-07-17

Railcar damping device

#112
20140190158
2014-07-10

Hydraulic circuit, and combination valve used in same hydraulic circuit

#113
20140150415
2014-06-05

Energy recovery hydraulic system

#114
20140130488
2014-05-15

Hydraulic drive apparatus for work machine

#115
20140033698
2014-02-06

METERLESS HYDRAULIC SYSTEM HAVING FORCE MODULATION

#116
20140033697
2014-02-06

METERLESS HYDRAULIC SYSTEM HAVING FORCE MODULATION

#117
20140033689
2014-02-06

METERLESS HYDRAULIC SYSTEM HAVING FORCE MODULATION

#118
20140026546
2014-01-30

Regeneration Valve for a Hydraulic Circuit

#119
20130340418
2013-12-26

Energy Storage Cylinder and Control System for a Moving Structural Member

#120
20130318955
2013-12-05

Electro-hydraulic system for recovering and reusing potential energy

#121
20130283777
2013-10-31

Hydraulic control system having energy recovery

#122
20130248306
2013-09-26

Vibration control device for railroad vehicle

#123
20130098464
2013-04-25

Closed-loop hydraulic system having regeneration configuration

#124
20130068885
2013-03-21

Landing gear retraction/extension device of aircraft

#125
20130047592
2013-02-28

Meterless hydraulic system having restricted primary makeup

#126
20130008156
2013-01-10

Hydraulic actuating device for actuation of one or more setting elements in, in particular, a motor vehicle transmission

#127
20120299310
2012-11-29

Systems and methods for energy storage and recovery using rapid isothermal gas expansion and compression

#128
20120279209
2012-11-08

Systems and methods for energy storage and recovery using compressed gas

#129
20120260642
2012-10-18

Load holding for meterless control of actuators

#130
20120260641
2012-10-18

Overrunning pump protection for flow-controlled actuators

#131
20120228530
2012-09-13

Bypass arrangement for valve actuator

#132
20120192553
2012-08-02

Energy-efficient hydraulic drive for the linear movement of a mass

#133
20120152107
2012-06-21

Flow regeneration hydraulic circuit

#134
20120006013
2012-01-12

High-efficiency energy-conversion based on fluid expansion and compression

#135
20120000557
2012-01-05

Systems and methods for reducing dead volume in compressed-gas energy storage systems

#136
20110314803
2011-12-29

Forming liquid sprays in compressed-gas energy storage systems for effective heat exchange

#137
20110296823
2011-12-08

Systems and methods for energy storage and recovery using gas expansion and compression

#138
20110219760
2011-09-15

Systems and methods for energy storage and recovery using compressed gas

#139
20110208363
2011-08-25

Method of controlling an electro-hydraulic actuator system having multiple actuators

#140
20110192157
2011-08-11

Cylinder device

#141
20110167813
2011-07-14

Systems and methods for energy storage and recovery using rapid isothermal gas expansion and compression

#142
20110056193
2011-03-10

Systems and methods for energy storage and recovery using compressed gas

#143
20100313557
2010-12-16

Hydraulic system for construction equipment having float function

#144
20100276023
2010-11-04

Valve system for drilling systems

#145
20100139277
2010-06-10

Systems and methods for energy storage and recovery using rapid isothermal gas expansion and compression

#146
20100089063
2010-04-15

Systems and methods for energy storage and recovery using rapid isothermal gas expansion and compression

#147
20100083651
2010-04-08

Circuit for controlling a double-action hydraulic drive cylinder

#148
20100024410
2010-02-04

Hydraulic system having regeneration modulation

#149
20090325755
2009-12-31

Full-toroidal continuously variable transmission

#150
20090282822
2009-11-19

Systems and methods for energy storage and recovery using compressed gas

#151
20080253841
2008-10-16

Hydraulically powered door and systems for operating same in low-temperature environments

#152
20080223205
2008-09-18

Hydraulic drive apparatus

#153
20080155975
2008-07-03

Hydraulic system with energy recovery

#154
20060230752
2006-10-19

Hydraulic drive control device

#155
20060090637
2006-05-04

Die drive unit of molding machine

#156
20060081121
2006-04-20

Hydraulic valve arrangement

#157
20060048508
2006-03-09

Oil pressure circuit for working machines

#158
20060025269
2006-02-02

Hydraulic linear drive of a transmission actuator

#159
20060000349
2006-01-05

Regeneration manifold for a hydraulic system

#160
20050144938
2005-07-07

Hydraulic drive unit

#161
20050092169
2005-05-05

Control device for a hydraulic lifting arrangement

#162
20050072954
2005-04-07

Hydraulic valve arrangement

#163
20050051025
2005-03-10

Valve arrangement and hydraulic drive

#164
20050011190
2005-01-20

Hydraulic active boom suspension for a telehandler