Patents-Review.com
ClassID:

142620 ⎘

F04B1/16 - CPC Classification

Classification description:

Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders having two or more sets of cylinders or pistons

Recent Application in this class:
#1
20260098524
2026-04-09

Food-processing machine

 #2
20250389259
2025-12-25

STRAIGHT AXIS VARIABLE DISPLACEMENT PISTON PUMP WITH ROTATING SWASH PLATE

 #3
20250327444
2025-10-23

HYDRAULIC UNIT WITH SEQUENTIAL PISTON PUMPS OPERATED BY ROLLING WEIGHTS

 #4
20250223962
2025-07-10

FLUID END ASSEMBLY

 #5
20250075697
2025-03-06

Fluid end assembly

 #6
20250059962
2025-02-20

LIQUID SUPPLY DEVICE

 #7
20240426294
2024-12-26

FLUID END ASSEMBLY

 #8
20240401577
2024-12-05

Positive Displacement Pump

 #9
20240253770
2024-08-01

ELECTROHYDRAULIC PITCH SETTING WITH REVERSIBLE PUMP

 #10
20240229629
2024-07-11

DUAL PUMP VFD CONTROLLED MOTOR ELECTRIC FRACTURING SYSTEM

 #11
20240117724
2024-04-11

MULTIPLE GENERATOR MOBILE ELECTRIC POWERED FRACTURING SYSTEM

 #12
20230332594
2023-10-19

Hydraulic pump

 #13
20230287882
2023-09-14

Fluid end assembly

 #14
20230175502
2023-06-08

MULTI-PISTON PUMP HAVING MULTIPLE INLET CONDUITS

 #15
20230116452
2023-04-13

FLUID END ASSEMBLY

 #16
20230112062
2023-04-13

Fracturing blender system and method using liquid petroleum gas

 #17
20230106807
2023-04-06

Fracturing blender system and method

 #18
20220372972
2022-11-24

Fluid end assembly

 #19
20220356792
2022-11-10

Dual pump VFD controlled motor electric fracturing system

 #20
20220356791
2022-11-10

Dual pump VFD controlled motor electric fracturing system

 #21
20220213890
2022-07-07

Fracturing pump assembly

 #22
20220056795
2022-02-24

Multiple generator mobile electric powered fracturing system

 #23
20220056794
2022-02-24

Mobile, modular, electrically powered system for use in fracturing underground formations using liquid petroleum gas

 #24
20220018341
2022-01-20

Cylinder drive device and flow channel unit

 #25
20210363869
2021-11-25

Dual pump VFD controlled motor electric fracturing system

 #26
20210215154
2021-07-15

Fluid end assembly

 #27
20210190048
2021-06-24

Handheld high-pressure cleaning machine

 #28
20210156376
2021-05-27

Liquid feeding device

 #29
20210140295
2021-05-13

Mobile, modular, electrically powered system for use in fracturing underground formations using liquid petroleum gas

 #30
20210108629
2021-04-15

Dual motor compressor

 #31
20210079901
2021-03-18

Ultra-long stroke multi-cylinder reciprocating pump

 #32
20210062631
2021-03-04

Turbine driven electric fracturing system and method

 #33
20200347711
2020-11-05

Dual pump VFD controlled motor electric fracturing system

 #34
20200347710
2020-11-05

Control system for electric fracturing operations

 #35
20200332782
2020-10-22

AXIAL PISTON DEVICE

 #36
20200318467
2020-10-08

Multiple generator mobile electric powered fracturing system

 #37
20200300240
2020-09-24

Fluid end assembly

 #38
20200284253
2020-09-10

Fluid end assembly

 #39
20200232455
2020-07-23

Pump With Segmented Fluid End Housing and In-Line Suction Valve

 #40
20200166025
2020-05-28

Pump and a desalination system including the pump

 #41
20190360473
2019-11-28

Wobble pump comprising a wobble plate

 #42
20190323499
2019-10-24

Linear hydraulic pump for submersible applications

 #43
20190293092
2019-09-26

High-density powder pump

 #44
20190277128
2019-09-12

Dual pump VFD controlled motor electric fracturing system

 #45
20190277127
2019-09-12

Dual pump trailer mounted electric fracturing system

 #46
20190277126
2019-09-12

Multiple generator mobile electric powered fracturing system

 #47
20190277125
2019-09-12

Control system for electric fracturing operations

 #48
20190271218
2019-09-05

VFD controlled motor mobile electrically powered system for use in fracturing underground formations for electric fracturing operations

 #49
20190145403
2019-05-16

Pump with segmented fluid end housing and in-line valve

 #50
20190145387
2019-05-16

Multi-chamber wobble plate pump

 #51
20190113028
2019-04-18

Rotatable piston assembly

 #52
20190055827
2019-02-21

Electric blender system, apparatus and method for use in fracturing underground formations using liquid petroleum gas

 #53
20190017503
2019-01-17

Fluid end assembly

 #54
20190010965
2019-01-10

Hydraulic apparatus comprising synthetically commutated machine, and operating method

 #55
20180328349
2018-11-15

Pump unit and handheld high pressure washer

 #56
20180298885
2018-10-18

Pump having a unitary body

 #57
20180266413
2018-09-20

ACCESS PUMP CASING

 #58
20180112653
2018-04-26

Pump and a desalination system including the pump

 #59
20180100482
2018-04-12

Hydroelectric power system and pump

 #60
20180058444
2018-03-01

Pump housing with multiple discharge valves

 #61
20170363081
2017-12-21

Pump casing

 #62
20170350376
2017-12-07

HYDRAULIC PUMP

 #63
20170348712
2017-12-07

DEVICE FOR EMITTING A LIQUID

 #64
20170314736
2017-11-02

Nitrogen pumping from a tank truck

 #65
20170284381
2017-10-05

DOUBLE- HEADED PISTON TYPE SWASH PLATE COMPRESSOR

 #66
20170260977
2017-09-14

POSITIVE DISPLACEMENT LACT PUMP METERING

 #67
20170184089
2017-06-29

Rotary Hydraulic Pump with ESP Motor

 #68
20170159641
2017-06-08

Variable displacement pump-motor

 #69
20170146008
2017-05-25

PUMP FOR SUPPLYING AN APPLICATION SYSTEM OF A LIQUID COVERING PRODUCT

 #70
20170097000
2017-04-06

PUMP ASSEMBLY

 #71
20170058888
2017-03-02

Pump casing

 #72
20170037718
2017-02-09

System and method for dedicated electric source for use in fracturing underground formations using liquid petroleum gas

 #73
20170036178
2017-02-09

Electric blender system, apparatus and method for use in fracturing underground formations using liquid petroleum gas

 #74
20160377068
2016-12-29

Hydraulic drive multi-element cryogenic pump

 #75
20160305421
2016-10-20

Reciprocating plunger pump and its engine body, the slider crank mechanism and the slide block, the bearing seat, the crankcase upper cover and the plunger seat

 #76
20160245266
2016-08-25

Piston shifting control system

 #77
20160230748
2016-08-11

MECHANICAL LEVER-DRIVER FOR PRESSURE PUMP

 #78
20160222961
2016-08-04

Barrel assembly for a fluid pump having separate plunger bore and outlet passage

 #79
20160215766
2016-07-28

Pump drive system with hydraulic tappets

 #80
20160160846
2016-06-09

Piston drive assembly

 #81
20160153443
2016-06-02

SENSOR ASSEMBLY FOR MEASURING DYNAMIC PRESSURE IN RECIPROCATING PUMPS

 #82
20160146198
2016-05-26

Metering Pump

 #83
20160131116
2016-05-12

Pump arrangement

 #84
20150292307
2015-10-15

Synchronized pump down control for a dual well unit with regenerative assist

 #85
20150252796
2015-09-10

Pump systems and associated methods for use with waterjet systems and other high pressure fluid systems

 #86
20150226209
2015-08-13

Variable displacement compressor and expander

 #87
20140374356
2014-12-25

Active pressure intensifier, reverse osmosis system and use thereof

 #88
20140308139
2014-10-16

DOUBLE SWASH PLATE PUMP WITH ADJUSTABLE VALVE RING CONCEPT

 #89
20140170005
2014-06-19

Liquid supply apparatus

 #90
20130195691
2013-08-01

Swing barrel type positive displacement pump using cross shaft joint bearing

 #91
20120164004
2012-06-28

Pump assembly

 #92
20120037726
2012-02-16

Wobble assembly for fluid pumping mechanism

 #93
20110027106
2011-02-03

Reciprocating pump

 #94
20100308074
2010-12-09

LIQUID PUMP

 #95
20090084258
2009-04-02

HYDROSTATIC PISTON MACHINE COMPRISING A ROTATABLE CAM DISK

 #96
20070101858
2007-05-10

Axial piston machine for independent delivery into a plurality of hydraulic circuits

 #97
16601174
2020-04-28

Dual motor compressor

 #98
16549568
2022-01-18

Fluid end block for frac pump

 #99
15641087
2020-10-20

High pressure pumps having a check valve keeper and associated systems and methods