Patents-Review.com
ClassID:

142834 ⎘

F04B25/02 - CPC Classification

Classification description:

Multi-stage pumps of stepped piston type

Recent Application in this class:
#1
20260009381
2026-01-08

RECONFIGURABLE MULTI-STAGE GAS COMPRESSOR

 #2
20240410345
2024-12-12

PISTON IN PISTON VARIABLE DISPLACEMENT HYDRAULIC DEVICE

 #3
20230272789
2023-08-31

PROCESS FOR INTERNALLY COOLING AN INLINE COMPRESSOR

 #4
20230250812
2023-08-10

RECIPROCATING COMPRESSOR

 #5
20230039317
2023-02-09

RECONFIGURABLE MULTI-STAGE GAS COMPRESSOR

 #6
20220090595
2022-03-24

Gas lift compressor system and method for supplying compressed gas to multiple wells

 #7
20220049688
2022-02-17

Variable-pressure air pump

 #8
20210404455
2021-12-30

Multi-stage compressor

 #9
20210372388
2021-12-02

Internally cooled inline drive compressor

 #10
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

 #11
20210348604
2021-11-11

Gas lift compressor system and method for supplying compressed gas to multiple wells

 #12
20210222684
2021-07-22

Vehicle-mounted electric oil-free air compressor

 #13
20200300233
2020-09-24

Air pump

 #14
20200056601
2020-02-20

Variable pressure air pump

 #15
20200049137
2020-02-13

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

 #16
20190383277
2019-12-19

Multi-stage displacement pump

 #17
20190345922
2019-11-14

Compressors for natural gas and related devices, systems, and methods

 #18
20190331103
2019-10-31

Gas leak determining method, and multi-stage compressor

 #19
20190285061
2019-09-19

COMPRESSOR

 #20
20190224589
2019-07-25

Valve controlled vacuum system

 #21
20190154022
2019-05-23

Compressor

 #22
20180230984
2018-08-16

Internally cooled inline drive compressor

 #23
20180149151
2018-05-31

Pump device for a brake system with a reluctance drive

 #24
20180066640
2018-03-08

Compressors for natural gas and related devices, systems, and methods

 #25
20180051690
2018-02-22

Free piston linear motor compressor and associated systems of operation

 #26
20170002801
2017-01-05

Linear compressor

 #27
20160169216
2016-06-16

Compressor

 #28
20150147207
2015-05-28

Linear piezoelectric compressor

 #29
20150125323
2015-05-07

Free piston linear motor compressor and associated systems of operation

 #30
20150027698
2015-01-29

Method of lifting oil from a well

 #31
20140356196
2014-12-04

Natural gas compressor

 #32
20140219830
2014-08-07

Compressors for natural gas and related devices, systems, and methods

 #33
20130287611
2013-10-31

Double acting refrigeration compressor

 #34
20120282114
2012-11-08

AIR PUMP

 #35
20120233989
2012-09-20

Fluid compression system

 #36
20120152248
2012-06-21

APPARATUS FOR COMPRESSING AND STORING OXYGEN ENRICHED GAS

 #37
20110164990
2011-07-07

Multi-stage compressor

 #38
20110052430
2011-03-03

FLUID MACHINE

 #39
20100158717
2010-06-24

Vapor recovery gas pressure boosters and methods and systems for using same

 #40
20090311114
2009-12-17

MULTI-STAGE PISTON COMPRESSOR

 #41
20080118373
2008-05-22

Apparatus for compressing and storing oxygen enriched gas

 #42
20070258831
2007-11-08

SINGLE STAGE TO TWO STAGE COMPRESSOR

 #43
20070237662
2007-10-11

Compressor having a piston performing simultaneous functions

 #44
20070116588
2007-05-24

Piston compressor for compressing gaseous media in at least two working chambers

 #45
20060104844
2006-05-18

Multi-stage piston type compressor

 #46
20060053830
2006-03-16

Reciprocating axial displacement device

 #47
20060000474
2006-01-05

Apparatus for compressing and storing oxygen enriched gas

 #48
20050123426
2005-06-09

Multi-directional pump

 #49
20050058552
2005-03-17

Valving for multi-stage vacuum pumps

 #50
20050042111
2005-02-24

Fluid pump

 #51
20050031476
2005-02-10

Single-step or muti-step piston compressor

 #52
20050013716
2005-01-20

High-pressure generating device

 #53
18536668
2024-05-28

Piston in piston variable displacement hydraulic device

 #54
18338735
2024-05-28

System of gas compression utilizing variable input pressures to produce a consistent output pressure