ClassID:

146426

F15B2211/6355 - CPC Classification

Classification description:

Circuits for servomotor systems; Circuit components or control therefor; Circuits providing pilot pressure to pilot pressure-controlled fluid circuit elements having valve means

Recent Application in this class:
#1
20260078819
2026-03-19

WORKING MACHINE

#2
20250230634
2025-07-17

HYDRAULIC SYSTEM IN WORK MACHINE

#3
20250198122
2025-06-19

Wheeled Construction Machine

#4
20250137475
2025-05-01

Calibration System in Hydraulic System

#5
20250137468
2025-05-01

FLUID CIRCUIT

#6
20250052260
2025-02-13

HYDRAULIC BRAKING ENERGY UTILIZATION FOR EMERGENCY STEERING, BRAKING, CHARGING ACCUMULATOR(S), AND/OR WORK FUNCTIONS TO REDUCE OR PREVENT ENGINE FROM OVERSPEED, ASSIST ACCELERATION AND/OR UNLIMITED TOWING

#7
20250027516
2025-01-23

PILOT PRESSURE CONTROL DEVICE

#8
20240426323
2024-12-26

Hydraulic valve bank and mobile hydraulic system

#9
20240301661
2024-09-12

Work Machine

#10
20240117879
2024-04-11

WORKING MACHINE

#11
20240117826
2024-04-11

Pilot proportional control valve apparatus, automatic calibration method and medium

#12
20230287907
2023-09-14

Hydraulic braking energy utilization for emergency steering, braking, charging accumulator(s), and/or work functions to reduce or prevent engine from overspeed, assist acceleration and/or unlimited towing

#13
20230203787
2023-06-29

HYDRAULIC SYSTEM FOR WORKING MACHINE

#14
20230167622
2023-06-01

Work Machine

#15
20230113111
2023-04-13

Hydraulic system

#16
20230078399
2023-03-16

Valve calibration system and calibration method

#17
20220356676
2022-11-10

System and method for controlling hydraulic fluid flow within a work vehicle

#18
20220333622
2022-10-20

Air cylinder, head cover, and rod cover

#19
20220325728
2022-10-13

Flow rate controller and drive device equipped with same

#20
20220316501
2022-10-06

Flow rate controller and drive device equipped with same

#21
20220298754
2022-09-22

Control valve of hydraulic system for working machine

#22
20220228609
2022-07-21

Power transfer unit with breakout friction reduction and leakage reduction

#23
20220154743
2022-05-19

Hydraulic circuit with combined compensation and energy recovery function

#24
20220154741
2022-05-19

Work machine

#25
20220154428
2022-05-19

Hydraulic system in work machine

#26
20220120295
2022-04-21

Drive device for hydraulic cylinder in work machine

#27
20220099113
2022-03-31

Methods and hydraulic apparatus

#28
20220049727
2022-02-17

Working machine

#29
20220049720
2022-02-17

Flow controller and driving apparatus including the same

#30
20210310502
2021-10-07

Hydraulic braking energy utilization for emergency steering, braking, charging accumulator(s), and/or work functions to reduce or prevent engine from overspeed, assist acceleration and/or unlimited towing

#31
20210262494
2021-08-26

Valve with anti-cavitation features

#32
20210148386
2021-05-20

Hydraulic system for working machine

#33
20210129677
2021-05-06

Electropneumatically regulated control of a current collector

#34
20210102626
2021-04-08

Hydraulic system of work machine and work machine

#35
20210071392
2021-03-11

Construction machine

#36
20210032851
2021-02-04

Electrohydraulic control device for construction machine and method thereof

#37
20210032849
2021-02-04

Hydraulic control system, work machine and method for controlling operation of a work attachment

#38
20210022281
2021-01-28

Hydraulic implement fluid recovery

#39
20200362537
2020-11-19

Hydraulic circuit

#40
20200340499
2020-10-29

Control device

#41
20200318747
2020-10-08

Control valve

#42
20200309166
2020-10-01

Hydraulic system and emergency operation method

#43
20200291971
2020-09-17

Hydraulic system

#44
20200232188
2020-07-23

Work machine

#45
20200232180
2020-07-23

Construction machine

#46
20200224764
2020-07-16

Hydraulic system of work machine and work machine

#47
20200217157
2020-07-09

Modular electro-hydraulic downhole control system

#48
20200217046
2020-07-09

Hydraulic drive system of construction machine

#49
20200208376
2020-07-02

Working machine

#50
20200200193
2020-06-25

FLUID PRESSURE CONTROL DEVICE

#51
20200182371
2020-06-11

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

#52
20200182370
2020-06-11

Self-cleaning water passageways on diaphragm insert

#53
20200173145
2020-06-04

Work machine hydraulic control system

#54
20200157771
2020-05-21

Fluid pressure control device

#55
20200124060
2020-04-23

System for damping mass-induced vibration in machines having hydraulically controlled booms or elongate members

#56
20200116168
2020-04-16

Fluid pressure control device

#57
20200096015
2020-03-26

Apparatus for controlling a hydraulic machine

#58
20200040554
2020-02-06

Work machine and method for controlling the same

#59
20200018329
2020-01-16

Apparatus for controlling a hydraulic machine

#60
20200002921
2020-01-02

Hydraulic system for working machine

#61
20200002920
2020-01-02

Hydraulic system for working machine

#62
20190352883
2019-11-21

Construction machine

#63
20190343033
2019-11-14

Hydraulic implement fluid recovery

#64
20190330824
2019-10-31

Hydraulic control system for construction machine

#65
20190309771
2019-10-10

Hydraulic fluid circuit with fixed minimum back pressure

#66
20190285094
2019-09-19

Hydraulic drive with fast stroke and load stroke

#67
20190271333
2019-09-05

Hydraulic excavator drive system

#68
20190257328
2019-08-22

Electro-hydraulic control system with fail-safe pilot valves

#69
20190219071
2019-07-18

Construction machine

#70
20190186106
2019-06-20

Work machine

#71
20190177953
2019-06-13

Hydraulic drive system of work machine

#72
20190136877
2019-05-09

Hydraulic braking emergency utilization for steering, braking, charging accumulator(s), and/or work functions to reduce or prevent engine from overspeed, assist acceleration and/or unlimited towing

#73
20190112786
2019-04-18

Pump control system of work machine

#74
20190106861
2019-04-11

Work machine

#75
20190106306
2019-04-11

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

#76
20180334784
2018-11-22

Hydraulic system for working machine and control valve

#77
20180306214
2018-10-25

SYSTEM FOR CONTROLLING A FLOW OF FLUID, FEEDING SYSTEM COMPRISING SUCH A CONTROL SYSTEM AND METHOD USING SUCH A FEEDING SYSTEM

#78
20180298922
2018-10-18

VALVE DEVICE

#79
20180291935
2018-10-11

HYDRAULIC DRIVE SYSTEM OF CONSTRUCTION MACHINE

#80
20180266080
2018-09-20

Hydraulic system for working machine

#81
20180180066
2018-06-28

Apparatus and methods for the control of hydraulic actuators

#82
20180156242
2018-06-07

Hydraulic drive system for construction machine

#83
20180142445
2018-05-24

Electro-hydraulic feed delivery system

#84
20180080507
2018-03-22

Drain valve

#85
20180051444
2018-02-22

Hydraulic control system of construction machine

#86
20180037447
2018-02-08

Switching valve, switching hydraulic system and crane

#87
20170370382
2017-12-28

Hydraulic drive system

#88
20170343020
2017-11-30

Intermittent air discharge apparatus

#89
20170342685
2017-11-30

Hydraulic drive system of construction machine

#90
20170284064
2017-10-05

Construction machine

#91
20170276151
2017-09-28

HYDRAULIC CIRCUIT FOR CONSTRUCTION EQUIPMENT

#92
20170241448
2017-08-24

Control device for hydraulic traveling device

#93
20170227025
2017-08-10

Hydraulic drive device with load-dependent pressure distributor

#94
20170204883
2017-07-20

Control device for zero-leak directional control valves

#95
20170167083
2017-06-15

Vertical ride quality system for a rail vehicle

#96
20170159679
2017-06-08

Hydraulic system of work machine and work machine

#97
20170107696
2017-04-20

Work machine

#98
20170107695
2017-04-20

Hydraulic system for work machine, and work machine

#99
20170075365
2017-03-16

Wireless valve actuator system and method

#100
20170073924
2017-03-16

Working machine having a hydraulically operated implement

#101
20170009784
2017-01-12

Hydraulic control system and method

#102
20160362034
2016-12-15

Hoist device for dump truck

#103
20160348335
2016-12-01

Liquid-pressure driving system

#104
20160333900
2016-11-17

Hydraulic drive system for construction machine

#105
20160312807
2016-10-27

Hydraulic system including independent metering valve with flowsharing

#106
20160305093
2016-10-20

Work machine

#107
20160258450
2016-09-08

Control apparatus

#108
20160230370
2016-08-11

Hydraulic system and working machine including the same

#109
20160153475
2016-06-02

Discrete pilot stage valve arrangement with fail freeze mode

#110
20160146230
2016-05-26

Hydraulic pressure control device for construction machinery

#111
20160138618
2016-05-19

Hydraulic regenerative and recovery parasitic mitigation system

#112
20160002886
2016-01-07

Pilot pressure control system

#113
20150377264
2015-12-31

Hydraulic system for construction machinery

#114
20150368878
2015-12-24

Construction equipment

#115
20150345112
2015-12-03

Work vehicle and work vehicle control method

#116
20150330415
2015-11-19

Hydraulic drive system for construction machine

#117
20150275468
2015-10-01

Hydraulic system for working machine

#118
20150267718
2015-09-24

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

#119
20150240841
2015-08-27

Pressure switch for oil supply

#120
20150240446
2015-08-27

Hydraulic excavator

#121
20150211501
2015-07-30

Tilting angle control device

#122
20150204360
2015-07-23

Hydraulic control valve for construction machinery

#123
20150113970
2015-04-30

Hydraulic system for construction machinery

#124
20150040553
2015-02-12

Hybrid working machine

#125
20150033719
2015-02-05

Reducing dig force in hydraulic implements

#126
20140366521
2014-12-18

Hydraulic drive system

#127
20140366518
2014-12-18

Hydraulic system of construction machine

#128
20140283509
2014-09-25

Power regeneration device for working machine and working machine

#129
20140190159
2014-07-10

Slewing type construction machine

#130
20140116039
2014-05-01

Apparatus for controlling/regulating the travel speed of a utility vehicle and method for same

#131
20140083538
2014-03-27

Electrohydraulic control valve

#132
20140034135
2014-02-06

Hydraulic system with a dynamic seal

#133
20130312402
2013-11-28

Hydraulic system for work machine

#134
20130251490
2013-09-26

Working machine with variable displacement hydraulic pump

#135
20130209276
2013-08-15

Hydraulic control system

#136
20130174915
2013-07-11

Valve positioning system with bleed prevention

#137
20130145757
2013-06-13

Hydraulic control system

#138
20130055705
2013-03-07

Hydraulic drive system for construction machine

#139
20130055704
2013-03-07

Apparatus for controlling raise speed of working machine for heavy equipment

#140
20130047592
2013-02-28

Meterless hydraulic system having restricted primary makeup

#141
20120216877
2012-08-30

Electro-hydraulic sensor fail safe

#142
20120152107
2012-06-21

Flow regeneration hydraulic circuit

#143
20120093624
2012-04-19

Work machine and control method for work machines

#144
20120067443
2012-03-22

Hydraulic system for working machine

#145
20120031088
2012-02-09

HYDRAULIC DRIVE SYSTEM FOR CONSTRUCTION MACHINE

#146
20120024531
2012-02-02

Autochoke system

#147
20120000191
2012-01-05

Hydraulic driving device for work machine

#148
20110283692
2011-11-24

Liquid pressure motor

#149
20110277843
2011-11-17

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

#150
20110268588
2011-11-03

CONTROLLER OF HYBRID CONSTRUCTION MACHINE

#151
20110262287
2011-10-27

Hydraulic pump controller for construction machine

#152
20110162744
2011-07-07

Device for piloting by means of a substantially incompressible fluid

#153
20110158830
2011-06-30

Negative control type hydraulic system

#154
20110039646
2011-02-17

Hydraulic system for actuating at least two valves

#155
20110010047
2011-01-13

Controller of hybrid construction machine

#156
20100313555
2010-12-16

Hydraulic control circuit for overcontrol of a slewing gear drive

#157
20100293936
2010-11-25

Hydraulic system with improved complex operation

#158
20100236233
2010-09-23

Work machine

#159
20100205955
2010-08-19

Hydraulic circuit of winch for crane

#160
20100100274
2010-04-22

Safety device for hydraulic working machine

#161
20100089045
2010-04-15

Hydraulic control circuit for construction machine

#162
20100018198
2010-01-28

Valve arrangement

#163
20090266429
2009-10-29

Hydraulic pressure control apparatus

#164
20090159143
2009-06-25

Fluid pressure circuit

#165
20090158725
2009-06-25

Hydraulic pump with control system

#166
20090151347
2009-06-18

Operation Control Circuit for Construction Machine

#167
20090145123
2009-06-11

Hydraulic circuit having holding valve of external pilot pressure operation type

#168
20090113887
2009-05-07

Hydraulic Drive Device

#169
20090107132
2009-04-30

HYDRAULIC SUPPLY SYSTEM WITH AN ADJUSTABLE PUMP

#170
20090094973
2009-04-16

Hydraulic circuit for heavy equipment

#171
20090077839
2009-03-26

Backhoe hydraulic system

#172
20090071141
2009-03-19

Hydraulic circuit for heavy equipment

#173
20090064865
2009-03-12

Integrated unit for air treatment in pneumatic systems

#174
20090007464
2009-01-08

Hydraulic shovel

#175
20080296522
2008-12-04

Relief pressure switching apparatus for hydraulic working machine

#176
20080245064
2008-10-09

Anti-saturation valve assembly for load sensing hydraulic system

#177
20080223205
2008-09-18

Hydraulic drive apparatus

#178
20080173014
2008-07-24

Hydraulic control device of construction machine

#179
20080141669
2008-06-19

Device for increasing pressure in cylinders with control unit

#180
20080016861
2008-01-24

Hydraulic controller for working machine

#181
20080011156
2008-01-17

Arrangement in connection with an oscillator cylinder

#182
20070169474
2007-07-26

Hydraulic control device for working machine

#183
20070119163
2007-05-31

Travel control device for hydraulically driven vehicle and hydraulically driven vehicle

#184
20070089408
2007-04-26

HYDRAULIC CONTROLLER FOR WORKING MACHINE

#185
20070062185
2007-03-22

Hydraulic controller for working machine

#186
20070056437
2007-03-15

Hydraulic control system for construction vehicle, particularly excavators

#187
20070033934
2007-02-15

Control device for hydraulic cylinder and operating machine including control device

#188
20060263189
2006-11-23

SYSTEM AND A METHOD FOR MOVING AN IMPLEMENT OF A VEHICLE

#189
20060254964
2006-11-16

Method and apparatus for angularly positioning a shaker separator bed

#190
20060230752
2006-10-19

Hydraulic drive control device

#191
20060130554
2006-06-22

Device for applying a working power to a workpiece

#192
20060130473
2006-06-22

Hydraulic control device for controlling a boom-swing frame combined motion in an excavator

#193
20060081121
2006-04-20

Hydraulic valve arrangement

#194
20060070673
2006-04-06

Soft start device for compressed air systems

#195
20060048508
2006-03-09

Oil pressure circuit for working machines

#196
20050247188
2005-11-10

Hydraulic control valve having holding valve with improved response characteristics

#197
20050217074
2005-10-06

Control system for pneumatically-powered door installation

#198
20050160904
2005-07-28

Anti-stall pilot pressure control system for open center systems

#199
20050144941
2005-07-07

Hydraulic circuit of excavating and slewing working vehicle

#200
20050144938
2005-07-07

Hydraulic drive unit

#201
20050132702
2005-06-23

Continuously variable torque shredder drive

#202
20050118036
2005-06-02

Regulatory device comprising a threshold valve control valve

#203
20050115605
2005-06-02

Progressive-starting unit for pneumatic systems

#204
20050098030
2005-05-12

Hydrostatic drive system with a safety device

#205
20050092169
2005-05-05

Control device for a hydraulic lifting arrangement

#206
20050071064
2005-03-31

Signal processing system for construction machine

#207
17162359
2022-04-26

System and method for controlling hydraulic fluid flow within a work vehicle

#208
17162296
2021-10-12

System and method for controlling hydraulic fluid flow within a work vehicle

#209
16214577
2020-04-21

Proportional valve for fluid flow control

#210
14127710
2014-11-04

Working vehicle and method for controlling the working vehicle