ClassID:

146303

F15B2211/329 - CPC Classification

Classification description:

Circuits for servomotor systems; Directional control characterised by the type of actuation actuated by fluid pressure

Recent Application in this class:
#1
20260055818
2026-02-26

DIRECTIONAL CONTROL VALVE

#2
20260022533
2026-01-22

CONSTRUCTION MACHINE

#3
20250137470
2025-05-01

MOVEMENT CONTROL DEVICE WITH DOUBLE BALANCING

#4
20250027516
2025-01-23

PILOT PRESSURE CONTROL DEVICE

#5
20250012051
2025-01-09

WORK MACHINE

#6
20240426386
2024-12-26

ELEVATABLE CHAMBER AND METHOD OF OPERATING THE SAME

#7
20240426323
2024-12-26

Hydraulic valve bank and mobile hydraulic system

#8
20240401614
2024-12-05

Hydraulic Drive System Having a 2X2Q Pump Unit

#9
20240392814
2024-11-28

Hydraulic arrangement

#10
20240384732
2024-11-21

Actuating Device for at Least One Fluidically Drivable Consumer

#11
20240376909
2024-11-14

ACTUATOR DEVICE AND METHOD FOR OPERATING SUCH AN ACTUATOR DEVICE

#12
20240301661
2024-09-12

Work Machine

#13
20240271640
2024-08-15

FLUID PRESSURE CONTROL DEVICE

#14
20240224876
2024-07-11

AGRICULTURAL WAGON

#15
20240191813
2024-06-13

MULTIFUNCTIONAL ELECTRO-HYDRAULIC FLOW CONTROL VALVE AND FLOW CONTROL METHOD

#16
20240159254
2024-05-16

Systems and Methods for Pressure Control

#17
20240130294
2024-04-25

AGRICULTURAL WAGON

#18
20240117601
2024-04-11

Hydraulic control system

#19
20240110654
2024-04-04

MANIFOLD AIR PRESSURE FEEDER AND MANIFOLD BLOCK FOR USE IN MANIFOLD AIR PRESSURE FEEDER

#20
20240060273
2024-02-22

Hydraulic system for working machine

#21
20240052599
2024-02-15

Multi-control valve

#22
20240003437
2024-01-04

HYDRAULIC DIRECTIONAL CONTROL VALVE

#23
20230332631
2023-10-19

Hydraulic system

#24
20230264926
2023-08-24

ADAPTIVE CONTROL OF A HYDRAULIC TIMBER GRIP ON A TIMBER HANDLING DEVICE

#25
20230203787
2023-06-29

HYDRAULIC SYSTEM FOR WORKING MACHINE

#26
20230193931
2023-06-22

Hydraulic machine

#27
20230184265
2023-06-15

Work machine

#28
20230167622
2023-06-01

Work Machine

#29
20230160179
2023-05-25

Hydraulic system for working machine

#30
20230146852
2023-05-11

Pressure control valve with reduced pilot flow and hydraulic control system with the same

#31
20230099778
2023-03-30

Control device and hydraulic system including the same

#32
20230078399
2023-03-16

Valve calibration system and calibration method

#33
20220349426
2022-11-03

Air cylinder, head cover, and rod cover

#34
20220325728
2022-10-13

Flow rate controller and drive device equipped with same

#35
20220242295
2022-08-04

Closed center hoist valve with snubbing

#36
20220170241
2022-06-02

Flow control valve

#37
20220154741
2022-05-19

Work machine

#38
20220154738
2022-05-19

Work machine and control method

#39
20220136532
2022-05-05

Landing gear lifting/lowering EHA system

#40
20220120295
2022-04-21

Drive device for hydraulic cylinder in work machine

#41
20220099113
2022-03-31

Methods and hydraulic apparatus

#42
20220098833
2022-03-31

Hydraulic system for working machine

#43
20220049720
2022-02-17

Flow controller and driving apparatus including the same

#44
20220025914
2022-01-27

System, valve assembly, and methods for oscillation control of a hydraulic machine

#45
20210395979
2021-12-23

Hydraulic drive system

#46
20210372085
2021-12-02

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

#47
20210341327
2021-11-04

Methods and apparatus for quantifying pneumatic volume usage via valve controllers

#48
20210341001
2021-11-04

Pilot control mechanism for boom bounce reduction

#49
20210285553
2021-09-16

Open center control valve configured to combine fluid flow received from multiple sources

#50
20210270294
2021-09-02

A HYDRAULIC SYSTEM FOR A LOAD HANDLING VEHICLE

#51
20210254637
2021-08-19

Hydraulic valve arrangement

#52
20210215267
2021-07-15

Solenoid flow control valve

#53
20210190095
2021-06-24

Hydraulic system with an energy recovery circuit

#54
20210131455
2021-05-06

Hydraulic control arrangement for supplying pressure medium to at least two hydraulic consumers

#55
20210102626
2021-04-08

Hydraulic system of work machine and work machine

#56
20210002868
2021-01-07

Work machine

#57
20200400165
2020-12-24

Method of operating a fluid system, fluid system and computer program product

#58
20200392972
2020-12-17

Control valve assembly for an indirect pneumatic control, and method for controlling a working fluid pressure

#59
20200362884
2020-11-19

Hydraulic system for working machine

#60
20200362537
2020-11-19

Hydraulic circuit

#61
20200340499
2020-10-29

Control device

#62
20200332907
2020-10-22

Fluid pressure control device

#63
20200318747
2020-10-08

Control valve

#64
20200309162
2020-10-01

Pilot device for a directional valve without internal cable connections

#65
20200292097
2020-09-17

Control system for spool valve avoiding mechanical stresses

#66
20200263392
2020-08-20

Vibration suppression control circuit

#67
20200248827
2020-08-06

Pressure relief valve

#68
20200248720
2020-08-06

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

#69
20200240444
2020-07-30

Valve arrangement and control method

#70
20200224764
2020-07-16

Hydraulic system of work machine and work machine

#71
20200217157
2020-07-09

Modular electro-hydraulic downhole control system

#72
20200200193
2020-06-25

FLUID PRESSURE CONTROL DEVICE

#73
20200182371
2020-06-11

Proportional valve for fluid flow control and generation of load-sense signal

#74
20200157771
2020-05-21

Fluid pressure control device

#75
20200140063
2020-05-07

Horizontal stabilizer trim actuator systems and methods

#76
20200116168
2020-04-16

Fluid pressure control device

#77
20200032820
2020-01-30

Pilot control mechanism for boom bounce reduction

#78
20200011353
2020-01-09

Mast with hydraulic circuit for assist cylinder

#79
20200010181
2020-01-09

Aircraft landing gear steering systems and methods with enhanced shimmy protection

#80
20200003332
2020-01-02

Method of controlling a three-position slide valve

#81
20200003239
2020-01-02

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

#82
20190249396
2019-08-15

Hydraulic drive device for work vehicle

#83
20190248265
2019-08-15

System and method for paving a surface and remotely controlling the flow of paving material from a dump truck into a hopper of a paver

#84
20190226504
2019-07-25

Electrohydraulic actuator

#85
20190219177
2019-07-18

Directional valve comprising a damping system for controlling a torque motor of a construction machine

#86
20190219071
2019-07-18

Construction machine

#87
20190186106
2019-06-20

Work machine

#88
20190186105
2019-06-20

Work machine

#89
20190128290
2019-05-02

Method for improving electro-hydraulic system response

#90
20190112786
2019-04-18

Pump control system of work machine

#91
20190106306
2019-04-11

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

#92
20190093677
2019-03-28

Vehicle hydraulic system

#93
20190085871
2019-03-21

Valve Module, Valve Assembly and Method for Operating a Valve Assembly

#94
20190063472
2019-02-28

Low profile electro-hydrostatic actuator

#95
20190063466
2019-02-28

Fluid control valve

#96
20190055963
2019-02-21

Hydraulic circuit for controlling a movable component

#97
20190040879
2019-02-07

Hydraulic driving device of industrial vehicle

#98
20190017590
2019-01-17

HYDRAULIC CONTROL DEVICE FOR VEHICLE TRANSMISSION APPARATUS

#99
20190017521
2019-01-17

Two-stage valve arrangement for hydraulic control of a piston- cylinder arrangement of a high- or medium-voltage power switch

#100
20190003497
2019-01-03

Hydraulic cylinder spool valve device

#101
20180347599
2018-12-06

VALVE DEVICE

#102
20180340552
2018-11-29

Pneumatic unit for a hydropneumatic pressure booster

#103
20180274209
2018-09-27

Hydraulic system for working machine

#104
20180266080
2018-09-20

Hydraulic system for working machine

#105
20180215116
2018-08-02

Residual load relief system for hydraulic compactors having rotary pumps

#106
20180195537
2018-07-12

Pneumatic valve drive

#107
20180180068
2018-06-28

Hydraulic system for working machine

#108
20180156243
2018-06-07

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

#109
20180156242
2018-06-07

Hydraulic drive system for construction machine

#110
20180148159
2018-05-31

Latch pin assembly

#111
20180142710
2018-05-24

Hydraulic drive with rapid stroke and load stroke

#112
20180094405
2018-04-05

Fluid pressure control device

#113
20180080196
2018-03-22

Hydraulic excavator drive system

#114
20180051444
2018-02-22

Hydraulic control system of construction machine

#115
20180037447
2018-02-08

Switching valve, switching hydraulic system and crane

#116
20180022440
2018-01-25

Horizontal stabilizer trim actuator systems and methods

#117
20170370382
2017-12-28

Hydraulic drive system

#118
20170241555
2017-08-24

Load sensing valve device

#119
20170218985
2017-08-03

Reducing noise double-channel oil pump

#120
20170204886
2017-07-20

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

#121
20170204883
2017-07-20

Control device for zero-leak directional control valves

#122
20170191506
2017-07-06

System for controlling the supply of hydraulic fluid to a work vehicle implement

#123
20170184208
2017-06-29

Apparatus to bias spool valves using supply pressure

#124
20170159679
2017-06-08

Hydraulic system of work machine and work machine

#125
20170107696
2017-04-20

Work machine

#126
20170073924
2017-03-16

Working machine having a hydraulically operated implement

#127
20170023138
2017-01-26

Valve assembly with two spool valves

#128
20170022790
2017-01-26

Annulus installed 6 zone control manifold

#129
20170009430
2017-01-12

Working machine control system

#130
20170009429
2017-01-12

Working machine control system

#131
20160348335
2016-12-01

Liquid-pressure driving system

#132
20160333899
2016-11-17

Fluid pressure system

#133
20160298719
2016-10-13

Control strategy for reducing boom oscillation

#134
20160298660
2016-10-13

Pilot control mechanism for boom bounce reduction

#135
20160230370
2016-08-11

Hydraulic system and working machine including the same

#136
20160215481
2016-07-28

Control system for hybrid construction machine

#137
20160195111
2016-07-07

Fluid pressure control apparatus

#138
20160160884
2016-06-09

Systems and methods for selectively engaged regeneration of a hydraulic system

#139
20160138618
2016-05-19

Hydraulic regenerative and recovery parasitic mitigation system

#140
20160108936
2016-04-21

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

#141
20160084279
2016-03-24

Hydraulic drive with rapid stroke and load stroke

#142
20160084278
2016-03-24

Hydraulic drive with rapid stroke and load stroke

#143
20160053778
2016-02-25

Apparatus and method for controlling spool displacement of construction machine

#144
20150369262
2015-12-24

Fluid pressure control device

#145
20150330527
2015-11-19

Directional control valve with spool delay mechanism

#146
20150330415
2015-11-19

Hydraulic drive system for construction machine

#147
20150285274
2015-10-08

Fluid pressure control device for power shovel

#148
20150275931
2015-10-01

Turbine valve actuator

#149
20150240455
2015-08-27

Hydraulic driving system for construction machine

#150
20150240446
2015-08-27

Hydraulic excavator

#151
20150204360
2015-07-23

Hydraulic control valve for construction machinery

#152
20150177741
2015-06-25

Fluidic actuator

#153
20150177740
2015-06-25

Controlled three-way proportional valve unit

#154
20150152887
2015-06-04

Fail-safe actuation system

#155
20150135699
2015-05-21

Hydraulic valve arrangement with control/regulating function

#156
20150135698
2015-05-21

Hydraulic valve arrangement with control/regulating function

#157
20150129070
2015-05-14

Apparatus to bias spool valves using supply pressure

#158
20150113970
2015-04-30

Hydraulic system for construction machinery

#159
20150096291
2015-04-09

Fluid pressure control device

#160
20150089935
2015-04-02

Control valve apparatus of power shovel

#161
20150081179
2015-03-19

Hydraulic system having dual tilt blade control

#162
20150044007
2015-02-12

Hydraulic control device and construction machine provided with same

#163
20150040555
2015-02-12

Hydraulic drive

#164
20150033719
2015-02-05

Reducing dig force in hydraulic implements

#165
20150013805
2015-01-15

Change-over valve

#166
20150013322
2015-01-15

Fluid pressure control device

#167
20140360349
2014-12-11

Hydraulic cylinder for use for example in a hydraulic tool

#168
20140345267
2014-11-27

Fluid valve arrangement comprising a bistable fluid valve

#169
20140190159
2014-07-10

Slewing type construction machine

#170
20140174068
2014-06-26

Hydraulic drive system for construction machine

#171
20140158469
2014-06-12

Control device for a hydraulic elevator drive

#172
20140150885
2014-06-05

Positive isolation through isolation of air supply to pneumatic valves

#173
20140130488
2014-05-15

Hydraulic drive apparatus for work machine

#174
20140083538
2014-03-27

Electrohydraulic control valve

#175
20140069677
2014-03-13

Air control device and air control method

#176
20140060026
2014-03-06

Work vehicle and work vehicle control method

#177
20140034133
2014-02-06

Dynamic seal wear mitigation system

#178
20140026969
2014-01-30

Fail-safe actuation system

#179
20140026747
2014-01-30

Hydraulic or pneumatic drive for actuating a fitting comprising a control valve or selector valve

#180
20140007942
2014-01-09

Method for improving excavating operation characteristic and grading operation characteristic of excavator

#181
20140000737
2014-01-02

Zonal hydraulic systems and methods

#182
20130333367
2013-12-19

Hydraulic circuit for pipe layer

#183
20130330160
2013-12-12

Construction machine with working attachment

#184
20130312858
2013-11-28

Flow control grid

#185
20130269808
2013-10-17

Directional valve equipped with pressure compensation

#186
20130180395
2013-07-18

Oil-pressure apparatus

#187
20130174915
2013-07-11

Valve positioning system with bleed prevention

#188
20130167522
2013-07-04

Hydraulic circuit for construction machine

#189
20130152575
2013-06-20

Hydraulic driving apparatus for working machine

#190
20130139909
2013-06-06

Hydraulic system

#191
20130098014
2013-04-25

Closed-loop hydraulic system having force modulation

#192
20130098013
2013-04-25

CLOSED-LOOP SYSTEM HAVING MULTI-CIRCUIT FLOW SHARING

#193
20130087209
2013-04-11

Steering control unit and electro-hydraulic steering load sense control

#194
20130055704
2013-03-07

Apparatus for controlling raise speed of working machine for heavy equipment

#195
20130001492
2013-01-03

Hydraulic circuit for counterweight attaching/detaching device

#196
20120280152
2012-11-08

Valve arrangement

#197
20120260993
2012-10-18

Poppet valve assembly for controlling a pneumatic actuator

#198
20120216877
2012-08-30

Electro-hydraulic sensor fail safe

#199
20120216871
2012-08-30

Split valve pump controlled hydraulic system

#200
20120180878
2012-07-19

Valve control valve circuit for operating a single acting hydraulic cylinder

#201
20120152575
2012-06-21

Hydraulic system having dual tilt blade control

#202
20120152107
2012-06-21

Flow regeneration hydraulic circuit

#203
20120133200
2012-05-31

Brake system and method

#204
20120093624
2012-04-19

Work machine and control method for work machines

#205
20120085601
2012-04-12

Shut-off valve for hydraulic system

#206
20120073669
2012-03-29

Compressed air supply system for a compressed air consumer circuit

#207
20110284311
2011-11-24

Control valve assembly for electro-hydraulic steering system

#208
20110284083
2011-11-24

Fail-freeze device for positioner

#209
20110277843
2011-11-17

Soft start device for pneumatic systems and method for the operation of a soft start device

#210
20110253239
2011-10-20

Active implement down force system with automatic latching of tractor power beyond pressure

#211
20110204267
2011-08-25

Hydraulic valve arrangement

#212
20110192474
2011-08-11

Hydraulic control valve for construction machinery

#213
20110175005
2011-07-21

Selector valve operating mechanism for working vehicle

#214
20110174393
2011-07-21

Proportional valve assembly

#215
20110146804
2011-06-23

Fluid operated actuator system

#216
20110094595
2011-04-28

Method of operating a control valve assembly for a hydraulic system

#217
20110088785
2011-04-21

SAFETY FEATURE FOR STUCK VALVE

#218
20110056192
2011-03-10

TECHNIQUE FOR CONTROLLING PUMPS IN A HYDRAULIC SYSTEM

#219
20110039646
2011-02-17

Hydraulic system for actuating at least two valves

#220
20110030816
2011-02-10

CONTROL SYSTEM FOR CONTROLLING A DIRECTIONAL CONTROL VALVE

#221
20110020146
2011-01-27

Swing drive controlling system for construction machine

#222
20110017310
2011-01-27

FLUID VALVE ARRANGEMENT

#223
20100319337
2010-12-23

HYDROSTATIC DRIVE SYSTEM

#224
20100313557
2010-12-16

Hydraulic system for construction equipment having float function

#225
20100293936
2010-11-25

Hydraulic system with improved complex operation

#226
20100269935
2010-10-28

Valve system

#227
20100243927
2010-09-30

Valve arrangement

#228
20100205955
2010-08-19

Hydraulic circuit of winch for crane

#229
20100186402
2010-07-29

Pump torque control system for hydraulic construction machine

#230
20100175948
2010-07-15

HYDRAULIC ACTUATING CIRCUIT FOR POWER-ASSISTED STEERING, AND MOTOR VEHICLE EQUIPPED THEREWITH

#231
20100100274
2010-04-22

Safety device for hydraulic working machine

#232
20100089045
2010-04-15

Hydraulic control circuit for construction machine

#233
20100084588
2010-04-08

Deepwater Hydraulic Control System

#234
20100083651
2010-04-08

Circuit for controlling a double-action hydraulic drive cylinder

#235
20100083650
2010-04-08

Hydraulic circuit for operating a tool

#236
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

#237
20100043421
2010-02-25

Method for operating a hydraulic system, and hydraulic system

#238
20100031649
2010-02-11

Hydraulic drive device for hydraulic excavator

#239
20100018198
2010-01-28

Valve arrangement

#240
20100011757
2010-01-21

Safety device for hydraulic working machine

#241
20090241765
2009-10-01

Holding control valve

#242
20090218161
2009-09-03

Control valve assembly for electro-hydraulic steering system

#243
20090205723
2009-08-20

Hydraulic circuit of construction machine

#244
20090199552
2009-08-13

Hydraulic working machine

#245
20090159143
2009-06-25

Fluid pressure circuit

#246
20090145123
2009-06-11

Hydraulic circuit having holding valve of external pilot pressure operation type

#247
20090126798
2009-05-21

Autonomous Shut-Off Valve System

#248
20090113887
2009-05-07

Hydraulic Drive Device

#249
20090102273
2009-04-23

Hydraulic drive device for vertical pivoting movement of load carrying platform

#250
20090094972
2009-04-16

Hydraulic control assembly

#251
20090071141
2009-03-19

Hydraulic circuit for heavy equipment

#252
20090064673
2009-03-12

Hydraulic control device

#253
20090057049
2009-03-05

Hydraulic traveling vehicle

#254
20090056324
2009-03-05

Hydraulic control device of construction machinery

#255
20090055056
2009-02-26

Swing drive system for construction machine

#256
20090045384
2009-02-19

Tool with hydraulic valve system

#257
20090025947
2009-01-29

Method, arrangement and valve for controlling rock drilling

#258
20090025378
2009-01-29

Hydraulic actuator control system for refuse collection vehicle

#259
20080245222
2008-10-09

Hydraulic valve arrangement

#260
20080245064
2008-10-09

Anti-saturation valve assembly for load sensing hydraulic system

#261
20080236154
2008-10-02

Hydraulic circuit for construction equipment

#262
20080229738
2008-09-25

Hydraulic circuit to prevent bucket separation from bucket rest during traveling of heavy equipment

#263
20080223205
2008-09-18

Hydraulic drive apparatus

#264
20080223027
2008-09-18

Hydraulic circuit for construction machine

#265
20080216645
2008-09-11

Fluid control system having selective recruitable actuators

#266
20080216644
2008-09-11

Antagonistic fluid control system for active and passive actuator operation

#267
20080173014
2008-07-24

Hydraulic control device of construction machine

#268
20080161152
2008-07-03

Synchronized speed shifting of multiple motors

#269
20080155977
2008-07-03

Apparatus for easing impact on boom of excavator and method of controlling the same

#270
20080121101
2008-05-29

Double check valve having floating function

#271
20080078174
2008-04-03

Backhoe hydraulic system

#272
20080072749
2008-03-27

Hydraulic valve assembly with a pressure compensated directional spool valve and a regeneration shunt valve

#273
20080066814
2008-03-20

Two-stage servo-valve

#274
20080053538
2008-03-06

Hydraulic circuit of option device for excavator

#275
20080053082
2008-03-06

Straight traveling hydraulic circuit

#276
20080053081
2008-03-06

Hydraulic control system

#277
20080016861
2008-01-24

Hydraulic controller for working machine

#278
20080011156
2008-01-17

Arrangement in connection with an oscillator cylinder

#279
20070295924
2007-12-27

Fluid controller and a method of detecting an error in a fluid controller

#280
20070277883
2007-12-06

Hydraulic circuit for construction machine

#281
20070277519
2007-12-06

Lifting gear valve arrangement

#282
20070261277
2007-11-15

Work machine

#283
20070245889
2007-10-25

Hydraulic Control Arrangement

#284
20070210645
2007-09-13

Hydraulic system with engine anti-stall control

#285
20070169474
2007-07-26

Hydraulic control device for working machine

#286
20070169471
2007-07-26

Vehicle steering mechanism

#287
20070131883
2007-06-14

Hydraulic drive system

#288
20070130935
2007-06-14

Integrated valve assembly and computer controller for a distributed hydraulic control system

#289
20070119163
2007-05-31

Travel control device for hydraulically driven vehicle and hydraulically driven vehicle

#290
20070089408
2007-04-26

HYDRAULIC CONTROLLER FOR WORKING MACHINE

#291
20070062185
2007-03-22

Hydraulic controller for working machine

#292
20070057571
2007-03-15

Hydraulic control system for heavy construction equipment

#293
20070056439
2007-03-15

Robustly stable servo-controlled metering poppet valve

#294
20070056437
2007-03-15

Hydraulic control system for construction vehicle, particularly excavators

#295
20070056279
2007-03-15

Hydraulic control system

#296
20070056277
2007-03-15

Travel vibration suppressing device for working vehicle

#297
20070044651
2007-03-01

Valve arrangement for the activation of a structural element

#298
20070044649
2007-03-01

Metering valve with integral relief and makeup function

#299
20070044647
2007-03-01

Hydraulic switching mechanism for longwall supports

#300
20070033934
2007-02-15

Control device for hydraulic cylinder and operating machine including control device