ClassID:

146160

F15B21/044 - 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 undissolved gas, e.g. de-aeration, venting or bleeding

Recent Application in this class:
#1
20260029004
2026-01-29

SYSTEM, METHOD, APPARATUS, DEVICE AND KIT FOR CONTAINING OIL DURING A HYDRAULIC PURGE

#2
20250369460
2025-12-04

Hydraulic Drive System

#3
20250261574
2025-08-21

HYDRAULIC APPARATUS FOR AGRICULTURAL VEHICLE

#4
20250171163
2025-05-29

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

#5
20250092886
2025-03-20

APPARATUSES AND METHODS FOR DE-AERATION OF A LIQUID

#6
20240410403
2024-12-12

Cylinder degassing unit and working cylinder

#7
20240125339
2024-04-18

SYSTEM, METHOD, APPARATUS, DEVICE AND KIT FOR CONTAINING OIL DURING A HYDRAULIC PURGE

#8
20230382481
2023-11-30

Linear actuator system

#9
20230296118
2023-09-21

Method for filling a hydraulic circuit of an electro-hydrostatic system using a filling device

#10
20230167836
2023-06-01

PROGNOSTICATION AND AMELIORATION OF GAS INGRESS IN HYDRAULIC SYSTEMS

#11
20230126930
2023-04-27

Method of removing hydraulic fluid from an aircraft hydraulic system, an aircraft hydraulic system, and an aircraft

#12
20230125466
2023-04-27

Pneumatic device with sealing means and method therefor

#13
20220412382
2022-12-29

TWIN CHAMBER AIR DRYER AND PNEUMATIC SYSTEM

#14
20220412381
2022-12-29

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

#15
20220341441
2022-10-27

Safety module for a process valve and system

#16
20220307527
2022-09-29

SYSTEM TO REDUCE LINE LOSS IN PRESSURE CONTROL HYDRAULIC CIRCUIT

#17
20220220983
2022-07-14

Apparatuses and methods for de-aeration of a liquid

#18
20220145912
2022-05-12

Suction strainer

#19
20220065273
2022-03-03

METHOD FOR ESTABLISHING HYDRAULIC READINESS, AND HYDRAULIC SYSTEM

#20
20210324924
2021-10-21

Clutch control device and hydraulic equipment control device

#21
20210285470
2021-09-16

Automatic air bleeding system for hydraulics

#22
20210285466
2021-09-16

Redundant electrohydraulic positioning control system

#23
20210277918
2021-09-09

Tank, and electrohydraulic compact assembly having a tank

#24
20210179218
2021-06-17

Linear actuator system

#25
20210131062
2021-05-06

Hydraulic tank

#26
20210048048
2021-02-18

Vent limiting device for use with fluid regulators

#27
20200309168
2020-10-01

Transmission air vent system

#28
20200291972
2020-09-17

PASSIVE DE-AERATION BARRIER FOR FLUID CHAMBER

#29
20200240446
2020-07-30

Air preparation device for motor vehicles

#30
20200240445
2020-07-30

Electrohydraulic System with a Hydraulic Spindle and at least One Closed Hydraulic Circuit

#31
20200217334
2020-07-09

Hydraulic drive unit

#32
20200198725
2020-06-25

Bicycle operating device

#33
20200180579
2020-06-11

Method to check for disturbances in an electronically slip-controllable brake system for a motor vehicle

#34
20200072255
2020-03-05

Loading vehicle structure

#35
20200040919
2020-02-06

Vent limiting device for use with fluid regulators

#36
20190321758
2019-10-24

Filter device and filtration device

#37
20190316604
2019-10-17

Rotary drive device and a robot arm of a robot equipped therewith

#38
20190301497
2019-10-03

Linear actuator system

#39
20190300089
2019-10-03

Saddle clamp

#40
20190300088
2019-10-03

Height-adjustable seat post

#41
20190285092
2019-09-19

Hydraulic reservoir with a vortex for deaeration of the hydraulic oil

#42
20190234435
2019-08-01

Hydraulic device and vehicle

#43
20190195250
2019-06-27

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

#44
20190186106
2019-06-20

Work machine

#45
20190145440
2019-05-16

Intake valve to eliminate air ingestion

#46
20190134542
2019-05-09

Intank filter bowl with de-aeration outlet shroud

#47
20190126172
2019-05-02

Device for medium separation

#48
20190063629
2019-02-28

Venting passage for a servovalve

#49
20190060791
2019-02-28

Vacuum system for fuel degassing

#50
20190048901
2019-02-14

Reusable gas generator driven pressure supply system

#51
20190030976
2019-01-31

Pneumatic circuit for passenger car pneumatic suspension system

#52
20180363770
2018-12-20

Wiring unit

#53
20180340554
2018-11-29

Pneumatic actuation systems having improved feedback control

#54
20180320716
2018-11-08

Compressed air preparation device and method for operating same

#55
20180304174
2018-10-25

Degasifying apparatus

#56
20180283567
2018-10-04

Vent assembly and method for a digital valve positioner

#57
20180283546
2018-10-04

Entrained air deflector for a hydrostatic transmission

#58
20180274526
2018-09-27

Electrohydraulic compact assembly

#59
20180178878
2018-06-28

Bicycle operating device

#60
20180106430
2018-04-19

LOW VOLUME NITROGEN SYSTEMS

#61
20180104629
2018-04-19

Return filter

#62
20180058481
2018-03-01

Vented linear actuator

#63
20180031008
2018-02-01

Bleed valve arrangements; and methods

#64
20180010709
2018-01-11

Actuator

#65
20180010700
2018-01-11

Valve with a control space vented via a sealing groove

#66
20170340992
2017-11-30

Filter apparatus

#67
20170328383
2017-11-16

Valve arrangement

#68
20170327099
2017-11-16

WORKING MEDIUM CIRCUIT FOR A HYDRODYNAMIC MACHINE

#69
20170321727
2017-11-09

HYDRAULIC CIRCUIT COMPRISING A VERY-LOW-PRESURE RESERVOIR PLACED UNDER NEGATIVE PRESSURE

#70
20170298965
2017-10-19

Hydraulic fluid tank arrangement

#71
20170292544
2017-10-12

Traction control system for electric multiple units

#72
20170284425
2017-10-05

Hydraulic system for work machine

#73
20170276154
2017-09-28

Hydraulic fluid de-aeration device

#74
20170241446
2017-08-24

High-precision hydraulic actuator

#75
20170227028
2017-08-10

Hydraulic drive system for working machine

#76
20170182438
2017-06-29

Intank filter bowl de-aeration outlet shroud and filter bowl and filter assembly including the same

#77
20170159776
2017-06-08

Chain tensioner

#78
20160319976
2016-11-03

Anti-siphon arrangement for hydraulic systems

#79
20160215797
2016-07-28

Self priming hydraulic pump and circuit

#80
20160138624
2016-05-19

Hydraulic Power System with Aeration Sensing for a Mobile Machine

#81
20160061234
2016-03-03

HYDRAULIC FLUID RESERVOIR WITH IMPROVED DE-AERATION

#82
20160052184
2016-02-25

End of stroke actuator bleed

#83
20160039402
2016-02-11

Hydraulic braking system, air bleeding device, and air bleeding method

#84
20150316158
2015-11-05

Vent assembly and method for a digital valve positioner

#85
20150247511
2015-09-03

Reservoir with draining compartment

#86
20150226241
2015-08-13

Separation removal and circulation system of air bubbles in fluid

#87
20150224423
2015-08-13

De-aeration device for a hydraulically actuated variable valve actuation system

#88
20150113971
2015-04-30

Hydraulic control system

#89
20150075383
2015-03-19

Cyclone reservoir

#90
20150052884
2015-02-26

HYDRAULIC ACTUATOR ARRANGEMENT

#91
20150013805
2015-01-15

Change-over valve

#92
20140360357
2014-12-11

Vented pressurized gas-powered actuator

#93
20140360350
2014-12-11

Vented pressurized gas-powered actuator

#94
20140352791
2014-12-04

AIRCRAFT HYDRAULIC AIR BLEED VALVE SYSTEM

#95
20140314595
2014-10-23

Reservoir vent and thermal stabilization orifice

#96
20140238923
2014-08-28

Work vehicle

#97
20140202545
2014-07-24

Hydraulic circuit

#98
20140174070
2014-06-26

LIQUID AND AIR SEPARATOR

#99
20140151386
2014-06-05

Tank breather assembly and mounting configuration

#100
20140138328
2014-05-22

Device and method for cleaning a hydraulic circuit

#101
20140116042
2014-05-01

Wave power generation system and hydraulic component thereof

#102
20140083290
2014-03-27

Hydraulic system de-aeration device

#103
20140047827
2014-02-20

AERATION IN LIQUID RESERVOIRS

#104
20140041733
2014-02-13

Breather of a hydraulic or electrohydraulic control device

#105
20140014215
2014-01-16

Return diffuser for hydraulic tank

#106
20130289840
2013-10-31

Hydraulic control system for automatic transmission

#107
20130276899
2013-10-24

Compressed air supply installation and method for operating a pneumatic installation

#108
20130240069
2013-09-19

Hydraulic fluid tank

#109
20130174918
2013-07-11

Bleeding system

#110
20130092266
2013-04-18

Hydraulic air bleed valve system

#111
20130092245
2013-04-18

Aircraft hydraulic air bleed valve system

#112
20130081708
2013-04-04

Baffle for hydraulic reservoir

#113
20130081705
2013-04-04

System for evacuating gas from a brake booster

#114
20120305114
2012-12-06

Oil tank

#115
20120252616
2012-10-04

Air bleeding valve for hydraulic tensioner of an engine and hydraulic tensioner incorporating same

#116
20120247318
2012-10-04

Hydraulic actuator with automatic purging at the end of its stroke

#117
20120204776
2012-08-16

Hydraulic system for a watercraft

#118
20110284089
2011-11-24

Fluid storage tank configured to remove entrained air from fluid

#119
20110253252
2011-10-20

BRAKE BLEEDING APPARATUS

#120
20110192701
2011-08-11

Ventilation device for a hydraulic cylinder

#121
20110079141
2011-04-07

Hydraulic cylinder that will automatically expunge air and self level

#122
20110072962
2011-03-31

SELF-BLEEDING DOUBLE ACTION HYDRAULIC CYLINDER

#123
20100319791
2010-12-23

Automotive air bleed valve for a closed hydraulic system

#124
20100237687
2010-09-23

ARRANGEMENT FOR VENTING OF HYDRAULIC SYSTEM IN MOTOR VEHICLE

#125
20100219289
2010-09-02

PURGE DEVICE AND HYDRAULIC SYSTEM COMPRISING SUCH A PURGE DEVICE

#126
20100139491
2010-06-10

Unit for accumulating and degassing oil

#127
20100101423
2010-04-29

Apparatus for degassing oil

#128
20090293965
2009-12-03

Fault-tolerant bleed valve assembly

#129
20090289208
2009-11-26

Pressurized Fluid Discharge Device

#130
20090199707
2009-08-13

Bleeding System For A Hydraulic Steering System

#131
20090064674
2009-03-12

Accumulator

#132
20090056553
2009-03-05

Liquid tank

#133
20090032755
2009-02-05

PTM self-bleed/failsafe open system for FWD and RWD

#134
20090007464
2009-01-08

Hydraulic shovel

#135
20080295917
2008-12-04

Tool assembly for evacuating, vacuum testing and charging a fluid system through a bleeder valve

#136
20080271445
2008-11-06

Hydraulic circuit for synchronized horizontal extension of cylinders

#137
20080164115
2008-07-10

Hydraulic circuit for controlling a hybrid clutch and an automatic transmission of a motor vehicle

#138
20070210646
2007-09-13

Method and plant for filling a hydraulic circuit with a control fluid

#139
20070131503
2007-06-14

Hydraulic apparatus for a bicycle brake lever device

#140
20060248884
2006-11-09

Shuttle valve for bi-rotational power units

#141
20060213192
2006-09-28

Hydraulic cylinder with coaxial, in-line reservoir

#142
20060191404
2006-08-31

Hydraulic system

#143
20060188371
2006-08-24

Wind turbine, hydraulic system, air bleed system and method of controlling at least two wind turbine blades

#144
20060158289
2006-07-20

Electromagnet

#145
20060081129
2006-04-20

Fluid deceleration/de-aeration device

#146
20050260064
2005-11-24

Speed governor and distributing valve for hydraulic turbines

#147
20050257844
2005-11-24

Trapped gas removal in liquid gas accumulator

#148
20050247057
2005-11-10

Master cylinder unit for vehicles

#149
18747811
2025-08-19

Vacuum assisted line bleeding

#150
16044149
2020-02-04

Hydraulic cylinder arrangement with automatic air bleeding and fluid flushing features