ClassID:

142564

F04B1/00 - CPC Classification

Classification description:

Multi-cylinder machines or pumps characterised by number or arrangement of cylinders

Sub-classes:
Recent Application in this class:
#1
20260055758
2026-02-26

POWER END MOUNT PLATE

#2
20250387562
2025-12-25

Systems and Components for Regulating Fluid Infusion to a Patient

#3
20250369429
2025-12-04

SPLIT-TYPE PLUNGER PUMP AND SPLIT-TYPE PLUNGER PUMP COMPONENT

#4
20250250970
2025-08-07

SEALING RING ASSEMBLIES CONFIGURED FOR PRESSURE LOCKING

#5
20250207574
2025-06-26

FRACTURING PUMP ARRANGEMENT USING A PLUNGER WITH AN INTERNAL FLUID PASSAGE

#6
20250027486
2025-01-23

FLUID ENDS FOR PUMPS AND RELATED METHODS

#7
20250020115
2025-01-16

FLUID END OF RECIPROCATING PUMP

#8
20240392764
2024-11-28

POWER END MOUNT PLATE

#9
20240280101
2024-08-22

Reversible Reciprocating Pump

#10
20240181465
2024-06-06

HYDRAULIC SYSTEM FOR A ROLLER CRUSHER

#11
20240175433
2024-05-30

Fracturing pump arrangement using a plunger with an internal fluid passage

#12
20240125320
2024-04-18

High-power five-cylinder drilling pump set, solid control system and drilling rig

#13
20240110562
2024-04-04

Power end mount plate

#14
20240019057
2024-01-18

System and method for integrated flow supply line

#15
20230383735
2023-11-30

Segregated multi fluid pump head assembly

#16
20230366393
2023-11-16

Bent axis plunger-type variable hydraulic motor pump

#17
20230321655
2023-10-12

Fluidic apparatus and methods useful for chemical and biological reactions

#18
20230272699
2023-08-31

Electric powered hydraulic fracturing pump system with single electric powered multi-plunger pump fracturing trailers, filtration units, and slide out platform

#19
20230256383
2023-08-17

Compressible fluid separator pump

#20
20230120606
2023-04-20

Pumping systems

#21
20230087682
2023-03-23

Systems and Components for Regulating Fluid Infusion to a Patient

#22
20230072947
2023-03-09

Sealing ring assemblies configured for pressure locking

#23
20220364448
2022-11-17

MODULAR SWITCHGEAR SYSTEM AND POWER DISTRIBUTION FOR ELECTRIC OILFIELD EQUIPMENT

#24
20220341430
2022-10-27

MOBILE PUMP SYSTEM WITH METERING PUMP AND METHOD THEREFOR

#25
20220152291
2022-05-19

Systems and components for regulating fluid infusion to a patient

#26
20220107039
2022-04-07

System and method for integrated flow supply line

#27
20220018232
2022-01-20

Electric powered hydraulic fracturing pump system with single electric powered multi-plunger pump fracturing trailers, filtration units, and slide out platform

#28
20210340978
2021-11-04

Power end frame with residual compressive stress and methods

#29
20210301807
2021-09-30

HIGH-POWER FIVE CYLINDER PLUNGER PUMP

#30
20210231621
2021-07-29

Liquid delivery device and liquid chromatograph

#31
20210231111
2021-07-29

COMPRESSED GAS ENGINE

#32
20210123435
2021-04-29

FIVE CYLINDER PLUNGER PUMP WITH INTEGRAL POWER END STRUCTURE

#33
20210123434
2021-04-29

MULTI-POINT SUPPORTED FIVE CYLINDER PLUNGER PUMP

#34
20210040830
2021-02-11

Automated control of hydraulic fracturing pumps

#35
20210025383
2021-01-28

Artificial intelligence based hydraulic fracturing system monitoring and control

#36
20210018001
2021-01-21

Oil monitoring

#37
20200362681
2020-11-19

Encoderless vector control for VFD in hydraulic fracturing applications

#38
20200332788
2020-10-22

SUPER-POWER FIVE-CYLINDER PLUNGER PUMP

#39
20200330988
2020-10-22

Fluidic apparatus and methods useful for chemical and biological reactions

#40
20200325761
2020-10-15

Pumping system for a wellsite

#41
20200282346
2020-09-10

Cartridge accumulator

#42
20200248682
2020-08-06

Pumping Systems

#43
20200109617
2020-04-09

Modular switchgear system and power distribution for electric oilfield equipment

#44
20200109616
2020-04-09

Electric powered hydraulic fracturing pump system with single electric powered multi-plunger pump fracturing trailers, filtration units, and slide out platform

#45
20200011417
2020-01-09

Sealing ring assemblies configured for pressure locking

#46
20190390767
2019-12-26

Control mechanism for stepless transmission

#47
20190301447
2019-10-03

Method of manufacturing a fluid end block with integrated web portion

#48
20190264683
2019-08-29

FLUID END ACCESS COVER LOCKING MECHANISM

#49
20190264631
2019-08-29

Method for controlling a fuel pump for a motor vehicle

#50
20190242393
2019-08-08

Pump arrangement, axial-flow machine and compressor comprising at least one rotor having permanent magnets and a stator having a multiplicity of teeth separated from each other wherein the tooth tip has a substantially rectangular-shaped cross section

#51
20190226468
2019-07-25

Air compressor unit

#52
20190202425
2019-07-04

Electrohydraulic motor vehicle control device comprising a hydraulic unit comprising electric components for actuating an electric motor arranged on a second circuit board embodied redundantly in two parts wherein the two parts define at least a part of an opening through which a pressure source extends

#53
20190178234
2019-06-13

Cavitation avoidance system

#54
20190170295
2019-06-06

Lubricating-grease pump and method for recovery of leakage grease of a lubricating-grease pump

#55
20190154020
2019-05-23

Mobile hydraulic fracturing system and related methods

#56
20190137365
2019-05-09

Automated multiple sample processor having a plurality of piston pumps

#57
20190084753
2019-03-21

Precision fluid dispensing device

#58
20190049013
2019-02-14

Sealing ring assemblies configured for pressure locking

#59
20190003473
2019-01-03

Systems and methods for controlling multi-chamber subsea pumps

#60
20180355865
2018-12-13

Reciprocating piston

#61
20180313351
2018-11-01

Reciprocating pump with improved cross-bore

#62
20180306151
2018-10-25

High-pressure fuel pump

#63
20180280975
2018-10-04

Fluidic apparatus and methods useful for chemical and biological reactions

#64
20180274822
2018-09-27

Variable-capacity compressor, two-stage compression system and control method thereof

#65
20180230977
2018-08-16

Pump fluid end with integrated web portion

#66
20180230793
2018-08-16

Tool and method for actively cooling downhole electronics

#67
20180202433
2018-07-19

Pressure pump valve monitoring system

#68
20180187721
2018-07-05

Synchronized roller with free wheels

#69
20180159452
2018-06-07

Apparatus and method for controlling a device

#70
20180141531
2018-05-24

Brake system for a motor vehicle

#71
20180135621
2018-05-17

Fluid end and center feed suction manifold

#72
20180100496
2018-04-12

System for detecting failure location in a pump

#73
20180094492
2018-04-05

Metal-to-metal sealed power connection for submersible pump motor

#74
20180073477
2018-03-15

Piston fuel pump

#75
20180058430
2018-03-01

Pump fluid end with integrated web portion

#76
20180030973
2018-02-01

Offset valve bore in a reciprocating pump

#77
20180017045
2018-01-18

Process pump having a crank drive

#78
20180010404
2018-01-11

Self-aligning mud pump assembly

#79
20170363082
2017-12-21

Fluid-end of a high pressure pump

#80
20170328322
2017-11-16

Pump, in particular high-pressure fuel pump

#81
20170307075
2017-10-26

Actuator unit for controlling hydraulic pump

#82
20170114780
2017-04-27

Pump Fluid End with Integrated Web Portion

#83
20170082101
2017-03-23

Apparatus and methods for identifying defective pumps

#84
20170058890
2017-03-02

Reciprocating pump

#85
20170021293
2017-01-26

Cartridge pump

#86
20170016433
2017-01-19

Reducing fluid pressure spikes in a pumping system

#87
20160341226
2016-11-24

Controlled pump augmentation for active vibration isolation

#88
20160151778
2016-06-02

Piston assembly and related systems for use with a fluidics device

#89
20160099666
2016-04-07

Method and means for detecting motor rotation

#90
20150316013
2015-11-05

Piston fuel pump and check valve therefore

#91
20150239008
2015-08-27

Method of coating lubrication paint on disk-shaped substrate

#92
20150118090
2015-04-30

Components for compressors having electroless coatings on wear surfaces

#93
20150078924
2015-03-19

Fracturing Pump

#94
20150007986
2015-01-08

Acoustic determination of piston position in a modular dynamics tester displacement pump and methods to provide estimates of fluid flow rate

#95
20140322033
2014-10-30

Offset valve bore in a reciprocating pump

#96
20140154099
2014-06-05

Hydraulic control system for a reverse osmosis hydraulic pump

#97
20140123638
2014-05-08

Pneumatic engine system with air circulation

#98
20140050597
2014-02-20

Pump unit for a high-pressure pump

#99
20140033914
2014-02-06

Piston pump comprising flat guiding

#100
20140030126
2014-01-30

Silencer device and motor vehicle comprising such a silencer device

#101
20140003968
2014-01-02

Piston-type transfer pump device, method for transferring particulate solid matter using such a device, application of the method to the feeding of a gasification reactor

#102
20140000451
2014-01-02

Reciprocating compressor

#103
20130340608
2013-12-26

Joint mechanism

#104
20130336813
2013-12-19

GAS COMPRESSOR

#105
20130327210
2013-12-12

Device for applying a directed contact pressure force to a multitude of samples

#106
20130255245
2013-10-03

Hydraulic oil cylinder, hydraulic cushion system, excavator and concrete pump truck

#107
20130209297
2013-08-15

Pumping device

#108
20130195701
2013-08-01

Pump Fluid End with Integrated Web Portion

#109
20130189138
2013-07-25

Virtually oil-free shock absorber having high dissipative capacity

#110
20130177462
2013-07-11

Dosing pump arrangement

#111
20130149171
2013-06-13

Fluid-working machine with multi-lobe ring cam

#112
20130121861
2013-05-16

Piston Pump

#113
20130108491
2013-05-02

Method for making a pump system with enhanced dynamic seal reliability

#114
20130064691
2013-03-14

Radial hydraulic motor

#115
20120183424
2012-07-19

Offset valve bore for a reciprocating pump

#116
20120144995
2012-06-14

Offset valve bore in a reciprocating pump

#117
20120141303
2012-06-07

Fluid control system

#118
20110296983
2011-12-08

Piston pump device

#119
20110284108
2011-11-24

Inflating module for use with an inflatable object

#120
20100326271
2010-12-30

RECIPROCATING PUMP AND METHOD FOR MAKING A SYSTEM WITH ENHANCED DYNAMIC SEAL RELIABILITY

#121
20090092510
2009-04-09

Quintuplex mud pump

#122
14265520
2016-11-29

Systems and methods for detecting a liquid

#123
13887476
2016-06-28

Opposing offset fluid end bores