ClassID:

142566

F04B1/02 - CPC Classification

Classification description:

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

Recent Application in this class:
#1
20260153078
2026-06-04

FLUID PUMP

#2
20260117757
2026-04-30

THICK MATERIAL PUMP AND METHOD FOR OPERATING A THICK MATERIAL PUMP

#3
20260014575
2026-01-15

PORTABLE AIRLESS SPRAYER

#4
20260002371
2026-01-01

CONSTRUCTION MATERIAL DELIVERY

#5
20250303050
2025-10-02

Pump Unit for Medical Purposes

#6
20240424509
2024-12-26

PORTABLE AIRLESS SPRAYER

#7
20240401577
2024-12-05

Positive Displacement Pump

#8
20240360827
2024-10-31

A PUMP WITH RACKS AND PINION

#9
20240287947
2024-08-29

AIR COMPRESSOR CYLINDER HEAD AND AIR COMPRESSOR

#10
20240167489
2024-05-23

PUMPING SYSTEM FOR THERMOCHEMICAL BIOMASS CONVERTERS

#11
20240141882
2024-05-02

Power system

#12
20240125311
2024-04-18

Fluid transfer and depressurization system

#13
20240077067
2024-03-07

Induced flow double disc pump assembly having rotating element

#14
20240035495
2024-02-01

HYDRAULIC SURGE DAMPENER

#15
20240011473
2024-01-11

COMMON PLUNGER FOR A LINEAR ACTUATED PUMP

#16
20230358219
2023-11-09

Micro piston pump

#17
20230332586
2023-10-19

Liquid Feeding Pump and Liquid Feeding Method

#18
20230295936
2023-09-21

TRUCK-MOUNTED CONCRETE PUMP

#19
20230271205
2023-08-31

Portable airless sprayer

#20
20230271204
2023-08-31

Portable airless sprayer

#21
20230219107
2023-07-13

Portable airless sprayer

#22
20230213030
2023-07-06

DUAL-PISTON FLUID PUMP

#23
20220275907
2022-09-01

Heated lubricant pump

#24
20220266280
2022-08-25

Portable airless sprayer

#25
20220266279
2022-08-25

Portable airless sprayer

#26
20220205440
2022-06-30

Liquid feed pump and liquid chromatography device

#27
20220193946
2022-06-23

Printing Method and Printing System

#28
20220168492
2022-06-02

Pump Unit for Medical Purposes

#29
20220163024
2022-05-26

Micro piston pump

#30
20220057123
2022-02-24

Liquid feeder

#31
20220025874
2022-01-27

Piston pump and method for operating a piston pump

#32
20210355924
2021-11-18

Fluid transfer and depressurization system

#33
20210310467
2021-10-07

POSITIVE-DISPLACEMENT PUMP AND PUMPING GROUP FOR FLUID PRODUCTS AND METHOD FOR THE USE THEREOF

#34
20210293226
2021-09-23

Precision, constant-flow reciprocating pump

#35
20210277887
2021-09-09

Pump installation member

#36
20210239103
2021-08-05

Apparatus for conveying thick matter

#37
20210162439
2021-06-03

Portable airless sprayer

#38
20210156370
2021-05-27

Auto-reversing driveshaft system and method

#39
20210088043
2021-03-25

INLINE PISTON PUMP

#40
20210079901
2021-03-18

Ultra-long stroke multi-cylinder reciprocating pump

#41
20200332781
2020-10-22

Hydraulic pressure amplifier

#42
20200309116
2020-10-01

Method for operating a piston compressor, and piston compressor

#43
20200292433
2020-09-17

Jet Fuel Thermal Oxidation Test Equipment

#44
20200182235
2020-06-11

Liquid delivery device

#45
20200149517
2020-05-14

Concrete pump system and method

#46
20190383279
2019-12-19

FLUID PUMPS AND RELATED SYSTEMS AND METHODS

#47
20190368476
2019-12-05

Piston-valve engagement in fluid sprayers

#48
20190353147
2019-11-21

INJECTION PUMP

#49
20190309737
2019-10-10

Viscous material pump with adjustable limitation of the delivery pressure

#50
20190264679
2019-08-29

Volumetric Pump

#51
20190264631
2019-08-29

Method for controlling a fuel pump for a motor vehicle

#52
20190162640
2019-05-30

Jet fuel thermal oxidation test equipment

#53
20190154019
2019-05-23

COATING AGENT PUMP

#54
20190093648
2019-03-28

VERSATILE HOUSING OF COMPRESSOR MOTORS

#55
20190093642
2019-03-28

RECIPROCATING AXIAL PUMP

#56
20190040850
2019-02-07

Micro piston pump

#57
20190010934
2019-01-10

Volumetric pump

#58
20180313344
2018-11-01

Portable hydraulic power unit having a pump fixed to an exterior side of a fluid supply tank

#59
20180313342
2018-11-01

Portable hydraulic power unit

#60
20180291881
2018-10-11

Continuous Flow Pumping System

#61
20180245581
2018-08-30

Liquid delivery device

#62
20180214897
2018-08-02

Portable airless sprayer

#63
20180149151
2018-05-31

Pump device for a brake system with a reluctance drive

#64
20180119689
2018-05-03

ALTERNATING FLOW HYDRAULIC PUMP CIRCUIT

#65
20180112655
2018-04-26

Subsea multipiston pump module and subsea multistage pump

#66
20180094627
2018-04-05

VARIABLE DISPLACMENT FLUID PUMP

#67
20180071761
2018-03-15

Piston engaging with valve for self-priming in fluid sprayers

#68
20180045186
2018-02-15

DUAL-CYLINDER PISTON PUMP

#69
20180030968
2018-02-01

METHODS AND SYSTEMS FOR PRESSURIZING HARSH FLUIDS

#70
20180030966
2018-02-01

DEVICE OF GREASE GUN

#71
20170354432
2017-12-14

Pump module

#72
20170306935
2017-10-26

Reciprocating pump

#73
20170298929
2017-10-19

Systems and methods for analyzing an infusion pump

#74
20170292358
2017-10-12

SYSTEM AND METHOD FOR PUMPING A PARTICLE-LADEN FLUID, SUCH AS PRESSURIZED FRACKING FLUID

#75
20170284381
2017-10-05

DOUBLE- HEADED PISTON TYPE SWASH PLATE COMPRESSOR

#76
20170254237
2017-09-07

Systems and methods for reducing the oil volume and windage in fuel pumps

#77
20170248129
2017-08-31

Positive-displacement pump and pumping group for fluid products and method for the use thereof

#78
20170234307
2017-08-17

VOLUMETRIC PUMP WITH BLEED MECHANISM

#79
20170184090
2017-06-29

RECIPROCATING WATER PUMP

#80
20170165692
2017-06-15

Portable airless sprayer

#81
20170096987
2017-04-06

Fuel pump

#82
20170095604
2017-04-06

Dialysate supply device and blood dialyzing apparatus having the same

#83
20170022986
2017-01-26

Fluid working machine and method of operating a fluid working machine

#84
20170021951
2017-01-26

DUAL SYRINGE FLUID PUMP

#85
20170009765
2017-01-12

Pressurised fluid driven diaphragm pump assembly

#86
20170009761
2017-01-12

Hydraulically driven bellows pump

#87
20160369792
2016-12-22

Connecting rod and crosshead assembly for enhancing the performance of a reciprocating pump

#88
20160341186
2016-11-24

Hydraulic double-acting hand pump

#89
20160281694
2016-09-29

System for feeding and pumping of less pumpable material in a conduit line

#90
20160244316
2016-08-25

Fluid meter with improved piston guidance

#91
20160195073
2016-07-07

Modular power generator

#92
20160177932
2016-06-23

Pumping system for gaseous and liquid media

#93
20160167759
2016-06-16

Pump device and tilt and trim device for outboard machine

#94
20160146198
2016-05-26

Metering Pump

#95
20160040659
2016-02-11

PUMP DEVICES FOR FEEDING PASTY MASSES

#96
20150360530
2015-12-17

Active suspension apparatus for vehicle and pump thereof

#97
20150345484
2015-12-03

SYRINGE PUMP SYSTEM FOR PULSE-FREE METERING AND PRECISE MIXING IN HPLC UHPLC, MICRO-HPLC AND NANO-HPLC

#98
20150300351
2015-10-22

PUMP AND GAS BOOSTER USING SAME

#99
20150300330
2015-10-22

Reciprocating pumps for downhole deliquification systems and pistons for reciprocating pumps

#100
20150272605
2015-10-01

Sterilizable pump unit

#101
20150260153
2015-09-17

Opposed swash plate type fluid pressure rotating machine

#102
20150240637
2015-08-27

Fluid pressure rotating machine

#103
20150233361
2015-08-20

MULTIPLEX PUMP SYSTEMS AND ASSOCIATED METHODS OF USE WITH WATERJET SYSTEMS AND OTHER HIGH PRESSURE FLUID SYSTEMS

#104
20150198185
2015-07-16

Compressed gas energy storage system

#105
20150192017
2015-07-09

Hydrostatic energy generator

#106
20150147210
2015-05-28

Pulsation-free positive displacement rotary pump

#107
20150139838
2015-05-21

Atomizer

#108
20150086402
2015-03-26

PUMP DEVICE

#109
20150078932
2015-03-19

Drive mechanism for rotary compressors or pumps

#110
20140369873
2014-12-18

Compressor for pressurized fluid output

#111
20140314593
2014-10-23

PUMP

#112
20130287615
2013-10-31

Pressure intensifier

#113
20130287611
2013-10-31

Double acting refrigeration compressor

#114
20130129534
2013-05-23

Pumping unit for a machine to distribute concrete

#115
20130121862
2013-05-16

Alternative methods to generate high pressure by iteration in a high-pressure multichamber

#116
20130092020
2013-04-18

Fluid pressure driven motor with pressure compensation chamber

#117
20130014834
2013-01-17

Drainage device for closed chamber containing liquid

#118
20120265128
2012-10-18

Continuously conveying infusion pump

#119
20110274572
2011-11-10

Method for feeding pasty masses and pump device for feeding pasty masses

#120
20110255993
2011-10-20

PRECOMPRESSION EFFECT IN PUMP BODY

#121
20110198413
2011-08-18

Portable airless sprayer

#122
20110132015
2011-06-09

Dedicated pulsing valve for compressor cylinder

#123
20110020155
2011-01-27

Ultra high pressure pump with an alternating rotation to linear displacement mechanism

#124
20100143155
2010-06-10

Piston Pump Having A Force Sensor And A Method For Controlling Said Pump

#125
20090257896
2009-10-15

ALTERNATIVE METHODS TO GENERATE HIGH PRESSURE BY ITERATION IN A HIGH-PRESSURE MULTICHAMBER

#126
20090068034
2009-03-12

PUMPING SYSTEM WITH PRECISE RATIO OUTPUT

#127
20090060764
2009-03-05

Medical Pump

#128
20090028727
2009-01-29

Diluter pump for chemistry analyzers

#129
20090007859
2009-01-08

Reciprocating device with dual chambered cylinders

#130
20080294040
2008-11-27

Volumetric pump

#131
20080174172
2008-07-24

Regenerative brake system and hydraulic pump/motor for use therein

#132
20080121216
2008-05-29

Opposed pumping load high pressure common rail fuel pump

#133
20070234717
2007-10-11

Alternative Methods to Generate High Pressure by Iteration in a High-Pressure Multichamber

#134
20070199391
2007-08-30

Apparatuses And Methods For Pumping Fluids

#135
20070164046
2007-07-19

Beverage dispenser

#136
20060110273
2006-05-25

Fuel pump with a guided tappet assembly and methods for guiding and assembly

#137
20060083634
2006-04-20

Pressure washer having oilless high pressure pump

#138
16129225
2019-10-15

Fluid transfer and depressurization system

#139
15601628
2020-06-16

Hydraulic system and method for providing fluid pressure to hydraulically-powered systems

#140
15471959
2018-06-19

Continuous flow pumping system

#141
14082627
2018-04-17

Positive displacement inductive pump

#142
13336438
2015-06-02

Reciprocating device with dual chambered cylinders