ClassID:

142726

F04B9/113 - CPC Classification

Classification description:

Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers with two mechanically connected pumping members reciprocating movement of the pumping members being obtained by a double-acting liquid motor

Recent Application in this class:
#1
20260078751
2026-03-19

GAS COMPRESSOR AND SYSTEM AND METHOD FOR GAS COMPRESSING

#2
20250334109
2025-10-30

PROCESS PUMPS AND RELATED METHODS OF TREATING A PROCESS LINE

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20250237212
2025-07-24

Hydraulic Pump Providing Enhanced Physical Mobility

#4
20250122867
2025-04-17

FLUID PUMP ASSEMBLY

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20240418161
2024-12-19

GAS COMPRESSOR AND SYSTEM AND METHOD FOR GAS COMPRESSING

#6
20240263628
2024-08-08

MULTI-PHASE FLUID PUMP SYSTEM

#7
20240110552
2024-04-04

PROCESS PUMPS AND RELATED METHODS OF TREATING A PROCESS LINE

#8
20240084828
2024-03-14

Method for controlling a hydraulic drive and hydraulic drive

#9
20240035495
2024-02-01

HYDRAULIC SURGE DAMPENER

#10
20240011473
2024-01-11

COMMON PLUNGER FOR A LINEAR ACTUATED PUMP

#11
20230193893
2023-06-22

MEMBRANE PUMP DEVICE

#12
20230145878
2023-05-11

METHODS FOR POWER TRANSFER IN CRYOGENIC FUEL APPLICATIONS

#13
20230097835
2023-03-30

Device and method for the provision of pressurized medium for injection into a high pressure process

#14
20220316471
2022-10-06

Pressure-pump cartridge and pressure pump

#15
20220307490
2022-09-29

Method for monitoring the state of a device and device

#16
20220268273
2022-08-25

Gas compressor and system and method for gas compressing

#17
20220120260
2022-04-21

Pumping system and fluid delivery installation

#18
20210381501
2021-12-09

Hydraulic and control system for resin injection

#19
20210317825
2021-10-14

Gas compressor and system and method for gas compressing

#20
20210293458
2021-09-23

Mechanical refrigeration system

#21
20210270257
2021-09-02

Multi-phase fluid pump system

#22
20210222691
2021-07-22

Fluid pump assembly

#23
20210207537
2021-07-08

Systems and methods for power transfer in cryogenic fuel applications

#24
20210062628
2021-03-04

Method and apparatus for producing well fluids

#25
20210033085
2021-02-04

Device and method for compressing a working medium

#26
20200332781
2020-10-22

Hydraulic pressure amplifier

#27
20200124040
2020-04-23

Gas compressor and system and method for gas compressing

#28
20190345923
2019-11-14

Gas compressor

#29
20190154017
2019-05-23

Metering pump and metering system

#30
20190145257
2019-05-16

Hydraulic and control system for resin injection

#31
20190032652
2019-01-31

Gas compressor and system and method for gas compressing

#32
20190010934
2019-01-10

Volumetric pump

#33
20180370075
2018-12-27

Apparatus for the production of a mixture of at least one gas and at least one liquid plastic component

#34
20180320671
2018-11-08

Liquid lifting device

#35
20180252242
2018-09-06

Double acting hydraulic pressure intensifier

#36
20180252241
2018-09-06

Hydraulic pressure intensifier

#37
20180252240
2018-09-06

Pressure amplifier

#38
20180252206
2018-09-06

Pressure amplifier

#39
20180156015
2018-06-07

Hydraulically actuated double-acting positive displacement pump system for producing fluids from a deviated wellbore

#40
20180149145
2018-05-31

High pressure generator with bidirectional check valves controlling overpressure

#41
20180135606
2018-05-17

Method and system for intensifying slurry pressure

#42
20180112655
2018-04-26

Subsea multipiston pump module and subsea multistage pump

#43
20180080444
2018-03-22

System for high pressure, high shear processing of fluids

#44
20180073497
2018-03-15

Gas compressor and system and method for gas compressing

#45
20180038365
2018-02-08

Gas compressor and system and method for gas compressing

#46
20180030978
2018-02-01

Gas compressor and system and method for gas compressing

#47
20170145376
2017-05-25

Ultrahigh-pressure homogenizing integrated device and cell disruptor

#48
20170130185
2017-05-11

Homogenized and integrated device with coaxial line and double-high pressure cylinder

#49
20170089328
2017-03-30

Fluid pressure producing method and fluid pressure producing device

#50
20170016434
2017-01-19

Hydraulic distributor for pump

#51
20160245266
2016-08-25

Piston shifting control system

#52
20160102658
2016-04-14

Metering pump and metering system

#53
20160053749
2016-02-25

Pressure intensification device

#54
20150308420
2015-10-29

Multi-Cylinder Hydraulically-Driven Pump System

#55
20150053075
2015-02-26

Reversible hydraulic pressure converter employing tubular valves

#56
20140154099
2014-06-05

Hydraulic control system for a reverse osmosis hydraulic pump

#57
20140150872
2014-06-05

Rotary control valve for reverse osmosis feed water pump with energy recovery

#58
20140072453
2014-03-13

Intensifier Pump Monitoring System

#59
20140023522
2014-01-23

DYNAMIC MECHANISM TO LIFT THE FLUID TO HIGHEST

#60
20130167951
2013-07-04

Hydraulic drive for a pressure booster

#61
20130167697
2013-07-04

Ultra high pressure pump

#62
20130142672
2013-06-06

Method for synchronizing linear pump system

#63
20130039778
2013-02-14

SYSTEM AND METHOD FOR CONTROLLING LINEAR PUMP SYSTEM

#64
20130004341
2013-01-03

Concrete pumping structure and control method thereof

#65
20120308411
2012-12-06

Water-powered pump for use in irrigation and for other purposes

#66
20120273056
2012-11-01

BARRIER COMPOSITION

#67
20120228220
2012-09-13

Molecular separator

#68
20120063939
2012-03-15

High pressure pump including hollow stud

#69
20110265642
2011-11-03

Double-Acting Subterranean Pump

#70
20110163017
2011-07-07

Wastewater treatment method and apparatus

#71
20110044830
2011-02-24

Pump assembly

#72
20100166573
2010-07-01

HIGH-PRESSURE GENERATION DEVICE

#73
20100040485
2010-02-18

High pressure dual-action hydraulic pump

#74
20100037967
2010-02-18

FEEDING DEVICE FOR LIQUID MATERIALS

#75
20090308692
2009-12-17

Lubricating pump with double-acting drive piston

#76
20090120461
2009-05-14

Aircraft Rinse System

#77
20090047144
2009-02-19

Fluid compressor and motor vehicle refuelling apparatus

#78
20090045127
2009-02-19

Aircraft Rinse System

#79
20090045126
2009-02-19

Molecular separator

#80
20080302109
2008-12-11

Apparatus and method for pumping a fluid from a storage vessel and detecting when the storage vessel is empty

#81
20080272065
2008-11-06

Molecular separator

#82
20080156709
2008-07-03

Wastewater treatment method and apparatus

#83
20080116145
2008-05-22

Molecular separator

#84
20080066915
2008-03-20

Integrated well access assembly and method

#85
20080014106
2008-01-17

Method of operation of a reciprocating positive-displacement pump and reciprocating positive-displacement pump

#86
20070286745
2007-12-13

Integrated mixing pump

#87
20060257271
2006-11-16

Diaphragm pump

#88
20060083624
2006-04-20

Subsea fluid delivery system and method

#89
20060060358
2006-03-23

Hydraulic downhole oil recovery system

#90
20050178905
2005-08-18

Aircraft rinse system

#91
20050170492
2005-08-04

Molecular separator

#92
20050167346
2005-08-04

Molecular separator

#93
20050142012
2005-06-30

Rodder pump

#94
20050123416
2005-06-09

Combined piston fluid motor and pump

#95
20050072800
2005-04-07

Fluid powered proportioning pump and post-mix beverage dispenser system using same

#96
20050036896
2005-02-17

Sanitary pump and sanitary valve

#97
15801710
2019-02-19

Uniformly pressurized thermal energy recovery systems

#98
15384977
2019-10-15

Gas compressor compressing well head casing gas

#99
13653360
2017-12-05

Thermal energy recovery systems