Patents-Review.com
ClassID:

142833 ⎘

F04B25/005 - CPC Classification

Classification description:

Multi-stage pumps with two cylinders

Recent Application in this class:
#1
20250347270
2025-11-13

AIR COMPRESSOR

 #2
20250237203
2025-07-24

DOUBLE ACTING TWO STAGE PISTON TYPE PUMP

 #3
20250130010
2025-04-24

HIGH PRESSURE COMPRESSOR SYSTEM FOR COMPRESSED AIR OR GAS RIFLES OR PISTOLS

 #4
20250027488
2025-01-23

AIR COMPRESSOR

 #5
20230250812
2023-08-10

RECIPROCATING COMPRESSOR

 #6
20230143865
2023-05-11

Hydraulic power pack system

 #7
20220120263
2022-04-21

COMPRESSOR AND HYDROGEN STATION

 #8
20220049688
2022-02-17

Variable-pressure air pump

 #9
20210404458
2021-12-30

Reciprocating-piston machine, compressed air supply system, vehicle and method for producing a reciprocating-piston machine

 #10
20210372384
2021-12-02

Piston compressor

 #11
20210364013
2021-11-25

Variable pressure air pump having a first cylinder defining a first chamber and a second cylinder defining a second chamber and a discharge device including a switch with at least one flow guide portion fluidly connected to the outside

 #12
20210340977
2021-11-04

Variable capacity compressor operation mode determination method and device, variable capacity compressor, and air conditioner

 #13
20210293229
2021-09-23

Double-piston compressor having a sliding block producing a stroke curve that deviates from a sinusoidal stroke curve

 #14
20210254610
2021-08-19

Three-stage compression air pump

 #15
20210215445
2021-07-15

Heat exchanger array system and method for an air thermal conditioner

 #16
20210215148
2021-07-15

METHOD AND EQUIPMENT FOR IMPROVING THE EFFICIENCY OF COMPRESSORS AND REFRIGERATORS

 #17
20210003121
2021-01-07

PROCESS FOR OPERATING A SINGLE-STROKE COMBUSTION ENGINE

 #18
20200332785
2020-10-22

Two stage air compressor

 #19
20200309116
2020-10-01

Method for operating a piston compressor, and piston compressor

 #20
20200284247
2020-09-10

Compressor having intermediate passage capable of conveying accumulated oil to a second compression part and air conditioner including same

 #21
20200277946
2020-09-03

Dual engine-compressor system

 #22
20200158104
2020-05-21

Method for operating a pressure control system comprising a multi-stage compressor, and pressure control system

 #23
20200122748
2020-04-23

Vacuum transport tube vehicle, system, and method for evacuating a vacuum transport tube

 #24
20200040880
2020-02-06

Dual engine-compressor system

 #25
20200040879
2020-02-06

MULTISTAGE COMPRESSOR

 #26
20190376498
2019-12-12

Micro high-pressure air compressor

 #27
20190331103
2019-10-31

Gas leak determining method, and multi-stage compressor

 #28
20190285062
2019-09-19

ALTERNATIVE TWIN CYLINDER AIR COMPRESSOR

 #29
20190285061
2019-09-19

COMPRESSOR

 #30
20190195213
2019-06-27

Electric driven gas booster

 #31
20190154022
2019-05-23

Compressor

 #32
20190145395
2019-05-16

Method of Construction for High Cycle Fatigue Resistant Pressure Vessels in Hydrogen Service

 #33
20190032646
2019-01-31

AN APPARATUS AND METHOD FOR COMPRESSING FLUID

 #34
20190010937
2019-01-10

Reciprocating-piston machine, compressed-air supply installation, compressed-air supply system, and vehicle

 #35
20180283366
2018-10-04

DOUBLE-PISTON COMPRESSOR OF A COMPRESSED AIR SUPPLY DEVICE

 #36
20180223820
2018-08-09

Reciprocating compressor having first and second cylinders in selective fluid communication with respective first and second suction plenums

 #37
20180180039
2018-06-28

METHOD FOR COMPRESSING A GAS, COMPUTING UNIT AND MULTI-STAGE PISTON COMPRESSOR

 #38
20180119687
2018-05-03

Air compressor

 #39
20170298918
2017-10-19

Vibration-dampening air compressor assembly

 #40
20170184087
2017-06-29

Multi-stage piston compressor having an outer cooling air conduction system

 #41
20170108246
2017-04-20

Two-stage rotary compressor and refrigeration cycle device having same

 #42
20170058879
2017-03-02

Positive displacement pump

 #43
20160341498
2016-11-24

Membrane heat exchanger system and method

 #44
20160341224
2016-11-24

Near-isothermal compressor/expander

 #45
20160281705
2016-09-29

PISTON COMPRESSOR AND METHOD FOR COMPRESSING A CRYOGENIC GASEOUS MEDIUM, IN PARTICULAR HYDROGEN

 #46
20160281701
2016-09-29

Method and equipment for improving the efficiency of compressors and refrigerators

 #47
20160248287
2016-08-25

COMPRESSOR

 #48
20160169216
2016-06-16

Compressor

 #49
20160160853
2016-06-09

Evacuated tube transport system

 #50
20150322934
2015-11-12

Compressor cooled by a temperature controlled fan

 #51
20150233362
2015-08-20

Turn-back coaxial gas pressurizing pump and gas pressurizing method

 #52
20150219083
2015-08-06

Vehicle Air Compressor Apparatus for a Heavy Vehicle Air Braking System

 #53
20150198185
2015-07-16

Compressed gas energy storage system

 #54
20150192017
2015-07-09

Hydrostatic energy generator

 #55
20150132150
2015-05-14

Method and system for compressing gas using a liquid

 #56
20140294636
2014-10-02

Reciprocating compressor

 #57
20140294615
2014-10-02

Actuating device for an adjustable convertible top system of a motor vehicle

 #58
20140170003
2014-06-19

Reciprocating compressor with vapor injection system

 #59
20130287611
2013-10-31

Double acting refrigeration compressor

 #60
20130108487
2013-05-02

Air-cooled reciprocating compressor having special cooling air conduction

 #61
20120301328
2012-11-29

Multistage piston compressor

 #62
20120265128
2012-10-18

Continuously conveying infusion pump

 #63
20120207633
2012-08-16

Lubricating pump and method for supplying lubricant

 #64
20120192710
2012-08-02

Oil-free air compressor for rail vehicles

 #65
20120023973
2012-02-02

METHOD AND EQUIPMENT FOR IMPROVING THE EFFICIENCY OF COMPRESSORS AND REFRIGERATORS

 #66
20120000837
2012-01-05

Multi-stage pump system

 #67
20110256001
2011-10-20

Reciprocating Compressor

 #68
20110164990
2011-07-07

Multi-stage compressor

 #69
20110127103
2011-06-02

POWER STEERING PUMP DRIVE

 #70
20110052430
2011-03-03

FLUID MACHINE

 #71
20100150746
2010-06-17

COMPRESSOR

 #72
20090274569
2009-11-05

Piston compressor

 #73
20090220364
2009-09-03

Reciprocating-piston compressor having non-contact gap seal

 #74
20090214361
2009-08-27

OIL-LESS COMPRESSOR WITH SEAL-DUST PROTECTION

 #75
20090068040
2009-03-12

Five-bar compressor

 #76
20090047144
2009-02-19

Fluid compressor and motor vehicle refuelling apparatus

 #77
20090047143
2009-02-19

Method and system for high viscosity pump

 #78
20080199327
2008-08-21

Apparatus and Method For Compressing a Gas

 #79
20070261553
2007-11-15

Capillary flow restrictor apparatus

 #80
20070258831
2007-11-08

SINGLE STAGE TO TWO STAGE COMPRESSOR

 #81
20060288719
2006-12-28

Two-stage linear compressor

 #82
20060130512
2006-06-22

Cooling-cycle device and cold/hot water dispenser comprising the same

 #83
20060110263
2006-05-25

Compressor

 #84
20060104844
2006-05-18

Multi-stage piston type compressor

 #85
20050175469
2005-08-11

High pressure two-stage reciprocating positive displacement compressor unit

 #86
20050042111
2005-02-24

Fluid pump