ClassID:

146158

F15B21/041 - CPC Classification

Classification description:

Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass; Special measures taken in connection with the properties of the fluid Removal or measurement of solid or liquid contamination, e.g. filtering

Recent Application in this class:
#1
20260151899
2026-06-04

INTEGRATED HYDRO-ELECTRIC ACTUATION AND THERMAL MANAGEMENT SYSTEM WITH DISTRIBUTED ELECTROLYTIC ENERGY STORAGE

#2
20260092428
2026-04-02

HYDRAULIC HAMMER WITH INTEGRATED OIL OR FLUID FILTER

#3
20250339796
2025-11-06

OIL FILTER DEVICE

#4
20250314260
2025-10-09

HYDRAULIC CIRCUIT

#5
20250250995
2025-08-07

Hydraulic Accumulator

#6
20250207517
2025-06-26

OIL PASSAGE CONTROL VALVE AND VALVE TIMING VARYING DEVICE

#7
20250182485
2025-06-05

FOREIGN OBJECT RECOGNITION SYSTEM

#8
20250171163
2025-05-29

HYDRAULIC SYSTEM FOR AN AIRCRAFT, HYDRAULIC ARRANGEMENT, AIRCRAFT, AIRCRAFT ARRANGEMENT, AND METHOD FOR TESTING SUCH HYDRAULIC SYSTEM

#9
20250135382
2025-05-01

FLUID COOLING/FILTERING ASSEMBLY

#10
20250092889
2025-03-20

SYSTEMS AND METHODS FOR CLUTCH VALVE CLEANING

#11
20250075715
2025-03-06

PNEUMATIC SUPPLY DEVICE FOR AN AGRICULTURAL TRACTOR

#12
20240423126
2024-12-26

GROUNDS MAINTENANCE VEHICLE

#13
20240367632
2024-11-07

BRAKE SIGNAL TRANSMITTER, BRAKING SYSTEM, AND VEHICLE

#14
20240352953
2024-10-24

PROGNOSTICS IN HYDRAULIC TRANSMISSION SYSTEM USING E-MACHINE DRIVE

#15
20240294972
2024-09-05

ENRICHMENT OF NUCLEIC ACID TARGETS

#16
20240261710
2024-08-08

Hybrid filter element apparatus

#17
20240229965
2024-07-11

Structure of Pneumatic Actuator

#18
20240159257
2024-05-16

Valve bore wash filters

#19
20240110582
2024-04-04

FLUID POWER SYSTEM MONITORING BASED ON FLUID PARAMETERS

#20
20230366414
2023-11-16

MULTI-STAGE, TELESCOPING HYDRAULIC CYLINDER, CYLINDER BEARING PROTECTION SYSTEM, AND SCRAPER FOR CYLINDER ROD

#21
20230242278
2023-08-03

FLUID MODULE

#22
20230139542
2023-05-04

DEVICE FOR CONTROLLING THE EXHAUST OF A VEHICLE PNEUMATIC SYSTEM

#23
20230118512
2023-04-20

RECYCLING SECONDARY RESERVOIR

#24
20230087782
2023-03-23

Soil processing machine and method for operating a soil processing machine

#25
20230065656
2023-03-02

FLUID LINE SEGMENT FOR GAS TURBINE ENGINE

#26
20220412381
2022-12-29

Resin molded article, resin molded article manufacturing method, and hydraulic control device

#27
20220372998
2022-11-24

Gasket device and pneumatic valve system for a commercial vehicle

#28
20220316502
2022-10-06

Intelligent filtration for electric-hydraulic work vehicles

#29
20220307527
2022-09-29

SYSTEM TO REDUCE LINE LOSS IN PRESSURE CONTROL HYDRAULIC CIRCUIT

#30
20220154737
2022-05-19

Method and apparatus for conversion of a pneumatic actuator to an electric power platform

#31
20220145912
2022-05-12

Suction strainer

#32
20220074476
2022-03-10

HYDROSTATIC TRANSAXLE

#33
20220049722
2022-02-17

Multi-function orifice subassembly for flow limiters

#34
20220016549
2022-01-20

End plate, filter element, filter system and method for filtering liquid

#35
20210381200
2021-12-09

Hydraulic system for a working machine

#36
20210363731
2021-11-25

Filter for a hydraulic circuit of an agricultural system

#37
20210301842
2021-09-30

DRAIN FOR HYDRAULIC SYSTEM

#38
20210238663
2021-08-05

Enrichment of nucleic acid targets

#39
20210222710
2021-07-22

Hydraulic tank protection system

#40
20210199188
2021-07-01

Hydraulic oil filter system for a motor vehicle transmission

#41
20210199030
2021-07-01

Fully variable valve train with rotary plunger for internal combustion engine

#42
20210190097
2021-06-24

Filter retaining plug

#43
20210123463
2021-04-29

Valve assemblies to supply fluid pressure to components in multiple transmission operating modes

#44
20210102562
2021-04-08

Coiled filter for hydraulic component

#45
20210071740
2021-03-11

Work vehicle transmission and work vehicle having the same

#46
20210031127
2021-02-04

Adaptor plug for a spin-on filter

#47
20200277974
2020-09-03

Pressure control device

#48
20200277973
2020-09-03

Filter assembly

#49
20200276523
2020-09-03

PRESSURE CONTROL DEVICE

#50
20200271143
2020-08-27

Hydraulic sub-assembly for a power machine

#51
20200166144
2020-05-28

Filter retaining plug and tool

#52
20200166054
2020-05-28

Hydraulic energy transfer system with filtering system

#53
20200131985
2020-04-30

Length-adjustable connecting rod with control device

#54
20200116172
2020-04-16

FILTER STRUCTURE ON PRESSURE RELIEF VALVE FOR HYDRAULIC TENSIONER

#55
20200072337
2020-03-05

Pressure control device

#56
20200060065
2020-02-27

Filter system for an agricultural implement

#57
20200056538
2020-02-20

Method for operating a reciprocating piston machine having at least one piston rod that is hydraulically adjustable in length

#58
20200049173
2020-02-13

Valve System For Flushing Contaminated Hydraulic Fluid

#59
20200049172
2020-02-13

Control system for flushing contaminated hydraulic fluid

#60
20200001851
2020-01-02

Method and a system for estimating the water content of brake fluid in a brake system

#61
20190388812
2019-12-26

Fluid synthesis monitoring system

#62
20190383314
2019-12-19

Filter subassembly for motor vehicle brake systems

#63
20190374884
2019-12-12

Apparatus for filtering a liquid and method for detecting a state of at least a filter element

#64
20190329649
2019-10-31

System for assisting the driving of a trailer from an open tipping hydraulic circuit

#65
20190321758
2019-10-24

Filter device and filtration device

#66
20190309770
2019-10-10

Filter retaining plug

#67
20190210641
2019-07-11

Enrichment of nucleic acid targets

#68
20190203745
2019-07-04

Self-cleaning mechanism for pneumatic central clutch release

#69
20190195250
2019-06-27

Method and apparatus for cleaning and/or replacing hydraulic oil in hydraulic drives

#70
20190145438
2019-05-16

Apparatus and method for a hydraulic system

#71
20190126172
2019-05-02

Device for medium separation

#72
20190118315
2019-04-25

Nozzle assembly

#73
20190085878
2019-03-21

Filter band assembly for solenoid-actuated valve

#74
20190070532
2019-03-07

Screen for hydraulic fluid

#75
20190003587
2019-01-03

Hydraulic switching assembly for a motor vehicle

#76
20180372188
2018-12-27

Work vehicle transmission and work vehicle having the same

#77
20180361283
2018-12-20

Filter state estimation system and filter state estimation method

#78
20180347601
2018-12-06

Hydraulic energy transfer system with filtering system

#79
20180340555
2018-11-29

Servovalve

#80
20180332761
2018-11-22

Filter system for an agricultural implement

#81
20180296952
2018-10-18

Apparatus for providing supplemental advanced filtration

#82
20180264484
2018-09-20

Hydraulic assembly for modulating a brake pressure of a wheel brake, which can be coupled fluidically to the hydraulic assembly, of a motor vehicle brake system with electronic slip control

#83
20180257014
2018-09-13

Closed antioxidant fluid system and method for promoting antioxidant properties thereof

#84
20180245490
2018-08-30

Mechanical device

#85
20180245488
2018-08-30

Variable valve timing control device

#86
20180229162
2018-08-16

Filter device

#87
20180229157
2018-08-16

RETURN FILTER

#88
20180171835
2018-06-21

Hydraulic pressure control valve and internal-combustion engine valve timing control apparatus

#89
20180126307
2018-05-10

FILTER DEVICE

#90
20180119611
2018-05-03

Length-adjustable connecting rod with a cylinder-piston assembly with an oil filter

#91
20180112771
2018-04-26

Hydraulic control circuit

#92
20180100524
2018-04-12

Axle assembly with hydraulically-operated disconnect mechanism and spin-on hydraulic filter

#93
20180093704
2018-04-05

Power steering tank baffle

#94
20180038394
2018-02-08

Strainer assembly for a fluid tank

#95
20170361822
2017-12-21

Compressed air-supply-system for a pneumatic system, housing for the compressed air-supply-system, method for manufacturing a housing, method for operating a compressed air supply, control-unit and vehicle

#96
20170356585
2017-12-14

Damping device

#97
20170327099
2017-11-16

WORKING MEDIUM CIRCUIT FOR A HYDRODYNAMIC MACHINE

#98
20170306993
2017-10-26

Varnish mitigation process

#99
20170298965
2017-10-19

Hydraulic fluid tank arrangement

#100
20170296947
2017-10-19

Strainer device

#101
20170268657
2017-09-21

Vehicular transmission

#102
20170152875
2017-06-01

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

#103
20170152870
2017-06-01

Hydraulic valve in particular cartridge valve

#104
20170089371
2017-03-30

Electromagnet for a hydraulic system

#105
20170089370
2017-03-30

Electromagnet for a hydraulic system

#106
20170030384
2017-02-02

Filter for hydraulic fluids for hydraulic circuits and process of making the same

#107
20170009786
2017-01-12

Screen for hydraulic valve and hydraulic valve

#108
20160367919
2016-12-22

Internal Magnetic Filter for Hydraulic Systems

#109
20160356208
2016-12-08

Corrosion resistant pneumatic actuator

#110
20160290496
2016-10-06

Power transmission device

#111
20160258452
2016-09-08

Method and system for generating an alert relating to a hydraulic actuation system

#112
20160214054
2016-07-28

Method and device for the regeneration of a two-chamber air dryer

#113
20160203240
2016-07-14

3D topographic and radiological modeling of an environment

#114
20160153554
2016-06-02

Transmission hydraulics controller

#115
20160017900
2016-01-21

Filter device

#116
20160010669
2016-01-14

Hydraulic device and prime mover device

#117
20160003371
2016-01-07

Pneumatic port shield

#118
20150252822
2015-09-10

Method for operating a hydraulic system of a self-propelled paver, hydraulic system, especially for using the method, and paver with such a hydraulic system

#119
20150192153
2015-07-09

Hydraulic Fluid Drying Device

#120
20150089936
2015-04-02

Aircraft hydraulic system

#121
20150082784
2015-03-26

Flushing circuit for hydraulic cylinder drive circuit

#122
20150034173
2015-02-05

Closed antioxidant fluid system and method for promoting antioxidant properties thereof

#123
20150020995
2015-01-22

Slim mobile hydraulic fluid cooling assembly

#124
20140326086
2014-11-06

High pressure hydraulic contamination injection and control system

#125
20140230424
2014-08-21

Hydraulic system with suction/return filter

#126
20140190158
2014-07-10

Hydraulic circuit, and combination valve used in same hydraulic circuit

#127
20140138328
2014-05-22

Device and method for cleaning a hydraulic circuit

#128
20140027364
2014-01-30

Internal magnetic filter for hydraulic systems

#129
20130327689
2013-12-12

FILTER WITH A BYPASS MECHANISM FOR A HYDRAULIC SYSTEM

#130
20130276439
2013-10-24

Hydraulic pump system and method of operation

#131
20130228143
2013-09-05

Filter arrangement of a control valve for a camshaft adjuster

#132
20130129512
2013-05-23

Device for removing moisture from a hydraulic medium

#133
20130092611
2013-04-18

Oil reservoir with baffle

#134
20130092113
2013-04-18

Control valve comprising an integrated filter and cam shaft phase setter comprising said control valve

#135
20130081985
2013-04-04

Hydraulic reservoir with self-bypassing filter

#136
20130061959
2013-03-14

Hydraulic valve with an annular filter element secured by a helical spring

#137
20120260515
2012-10-18

HYDRAULIC EXSICCATE DEVICE

#138
20120216495
2012-08-30

Removable external filter for servo air actuated valves

#139
20120181234
2012-07-19

Filter and method for filtration of hydraulic oil in a return line to a hydraulic tank, and a drilling rig comprising the filter

#140
20120118800
2012-05-17

FILTER DEVICE

#141
20120067378
2012-03-22

Method for removing foreign matter from a digital hydraulic pressure controller

#142
20120067205
2012-03-22

Method and apparatus for purifying compressed air

#143
20120017552
2012-01-26

Removable external filter for servo air actuated valves

#144
20110315573
2011-12-29

Oil tank

#145
20110253607
2011-10-20

Power steering filter assembly

#146
20110214743
2011-09-08

Method and a device for the cleaning of a piston-based hydraulic accumulator

#147
20110180486
2011-07-28

Method for cleaning hydraulic liquid, computerprogram product, control unit, and industrial truck

#148
20110168610
2011-07-14

Device for dewatering a hydraulic fluid

#149
20110153275
2011-06-23

Device for detecting contamination level of operating oil

#150
20110079373
2011-04-07

Fluid cooling device with a replenishment circuit

#151
20110017672
2011-01-27

Process for dewatering a hydraulic fluid

#152
20110000859
2011-01-06

Fluid purification level control apparatuses and methods

#153
20100257824
2010-10-14

Filter device, particularly reflux vacuum filter, and filter element for such a filter device

#154
20100243085
2010-09-30

Hydraulic valve with a filter and check valve band

#155
20100219113
2010-09-02

Device for Filtering Pressurized Oil

#156
20100146959
2010-06-17

Working fluid accumulation device

#157
20100095917
2010-04-22

Hydraulic fluid passage with particle gettering magnet field of the invention

#158
20090205328
2009-08-20

CONSTRUCTION MACHINE

#159
20090173222
2009-07-09

Fluid system

#160
20090064865
2009-03-12

Integrated unit for air treatment in pneumatic systems

#161
20080283132
2008-11-20

GASKET WITH INTERNAL SCREEN AND METHOD OF MANUFACTURING THE SAME

#162
20080173356
2008-07-24

Hydraulic fluid dehydration system and method including pre-heating

#163
20080116208
2008-05-22

Construction machine having working oil tank with filter case

#164
20070295005
2007-12-27

Work machine hydraulic system with bypass conditioning and associated method

#165
20070267417
2007-11-22

CONSTRUCTION MACHINE AND HYDRAULIC OIL TANK THEREOF

#166
20070261737
2007-11-15

Modular unit

#167
20070222573
2007-09-27

Auto fluid condition alert

#168
20070209982
2007-09-13

Hydraulic lubrication filter circuit

#169
20070131601
2007-06-14

Hydraulic fluid passage with particle gettering magnet

#170
20070095315
2007-05-03

Control valve for an apparatus for variable setting of the control times of gas exchange valves of an internal combustion engine

#171
20060242957
2006-11-02

Orifice element with integrated filter, slow return valve, and hydraulic drive unit

#172
20060086249
2006-04-27

Membrane-based reservoir dryer

#173
20060037470
2006-02-23

Fluid circuit and industrial truck having a fluid circuit

#174
20060016495
2006-01-26

Control valve for a device to modify the timing of an internal combustion engine

#175
20060000757
2006-01-05

Hydraulic unit for industrial trucks

#176
20050262838
2005-12-01

Hydraulic machine, system for monitoring health of hydraulic machine, and method thereof

#177
20050255967
2005-11-17

Method of automatically flushing debris from an electrically-operated hydraulic valve

#178
20050247641
2005-11-10

Hydraulic system for mobile conveying vehicles

#179
20050211609
2005-09-29

Hydraulic filter assembly with priority valve

#180
20050199283
2005-09-15

Hydraulic filter assembly with priority valve

#181
20050178451
2005-08-18

Solenoid valve

#182
20050170714
2005-08-04

Piston for tilt and trim unit of outboard drive of marine propulsion unit

#183
20050133429
2005-06-23

Coin-filter mounting structure

#184
20050132675
2005-06-23

Device for filtering of the air flow in pneumatic systems

#185
20050056331
2005-03-17

Device for damping pressure pulsations and a hydraulic unit equipped with this device

#186
20050016167
2005-01-27

Hydraulic drive system and improved filter sub-system therefor

#187
17895673
2023-12-26

Filter assembly for a servovalve

#188
16409484
2020-04-21

Hydraulic fluid conditioning device

#189
13946778
2018-11-13

Hydraulic motor

#190
13460763
2016-12-13

Hydraulic fluid heat dissipation control assembly and method