Patents-Review.com
ClassID:

142837 ⎘

F04B27/005 - CPC Classification

Classification description:

Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders with two cylinders

Recent Application in this class:
#1
20260028974
2026-01-29

COMMON-ROD SERIES HYDRAULIC COMPRESSORS

 #2
20250347270
2025-11-13

AIR COMPRESSOR

 #3
20250320857
2025-10-16

MULTIPLE CRYOGENIC PUMP ASSEMBLY FOR HYDROGEN FUELING STATION

 #4
20250290497
2025-09-18

CONDUIT SYSTEM FOR BOOSTER PUMP

 #5
20250180001
2025-06-05

COMPRESSOR WITH SUCTION VALVES IN PISTON AND CRANKCASE

 #6
20250059965
2025-02-20

RECIPROCATING COMPRESSOR

 #7
20250027488
2025-01-23

AIR COMPRESSOR

 #8
20250027487
2025-01-23

INTEGRATED AIR COMPRESSOR

 #9
20240410493
2024-12-12

APPARATUS AND METHOD FOR ENGINE CONTROL

 #10
20240352925
2024-10-24

AIR COMPRESSOR FOR VEHICLE

 #11
20240125311
2024-04-18

Fluid transfer and depressurization system

 #12
20240110555
2024-04-04

SOUND REDUCTION DEVICE FOR ROCKING PISTON COMPRESSORS

 #13
20240052818
2024-02-15

RECIPROCATING PISTON PUMP

 #14
20230354532
2023-11-02

GAS COMPRESSOR

 #15
20230272789
2023-08-31

PROCESS FOR INTERNALLY COOLING AN INLINE COMPRESSOR

 #16
20230046193
2023-02-16

Reciprocating piston pump comprising a housing defining a first chamber and a second chamber cooperating with a first piston and a second piston to define a third chamber and a fourth chamber

 #17
20220389920
2022-12-08

High Volume, Low Pressure Oilless Pump

 #18
20220381236
2022-12-01

REFRIGERANT COMPRESSOR

 #19
20220282683
2022-09-08

Apparatus and method for engine control

 #20
20220154707
2022-05-19

ELECTRIC VACUUM PUMP FOR BRAKING SYSTEM ON PASSENGER CARS WITH V-TWIN PISTON ARRANGEMENT

 #21
20220136493
2022-05-05

Apparatuses, systems, and methods for improved performance of a pressurized system

 #22
20220082094
2022-03-17

Pump body assembly, compressor and air conditioner

 #23
20220049688
2022-02-17

Variable-pressure air pump

 #24
20210404458
2021-12-30

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

 #25
20210372388
2021-12-02

Internally cooled inline drive compressor

 #26
20210301812
2021-09-30

Control method of compressor and refrigerant circulation system

 #27
20210270260
2021-09-02

Compressor cylinder switching control method and device, unit and air conditioning system

 #28
20210215148
2021-07-15

METHOD AND EQUIPMENT FOR IMPROVING THE EFFICIENCY OF COMPRESSORS AND REFRIGERATORS

 #29
20210088036
2021-03-25

Reciprocating piston pump comprising a housing defining a first chamber and a second chamber cooperating with a first piston and a second piston to define a third chamber and a fourth chamber

 #30
20210017971
2021-01-21

MULTI-CYLINDER FRIGORIFIC COMPRESSOR WITH EXTERNAL DELIVERY MANIFOLD

 #31
20200332785
2020-10-22

Two stage air compressor

 #32
20200325882
2020-10-15

System and method for multi-level vacuum generation and storage

 #33
20200309116
2020-10-01

Method for operating a piston compressor, and piston compressor

 #34
20200056601
2020-02-20

Variable pressure air pump

 #35
20200056600
2020-02-20

Rolling cylinder displacement compressor

 #36
20200040882
2020-02-06

Gas intensifier with lubrication

 #37
20190345922
2019-11-14

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

 #38
20190316574
2019-10-17

GM cryocooler and method of operating GM cryocooler

 #39
20190285062
2019-09-19

ALTERNATIVE TWIN CYLINDER AIR COMPRESSOR

 #40
20190277273
2019-09-12

Inflating device

 #41
20190277272
2019-09-12

Manual dual-directional inflating device

 #42
20190277271
2019-09-12

Manual dual-directional inflating device

 #43
20190249653
2019-08-15

COMPRESSOR

 #44
20190211817
2019-07-11

High-pressure positive displacement plunger pump

 #45
20190178239
2019-06-13

Apparatuses, Systems, and Methods for Improved Performance of a Pressurized System

 #46
20190032647
2019-01-31

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

 #47
20190010937
2019-01-10

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

 #48
20180355857
2018-12-13

Method and system for enhancing performance in a reciprocating compressor

 #49
20180306179
2018-10-25

ZERO PULSATION PUMP

 #50
20180291890
2018-10-11

INTEGRATED MUFFLER ASSEMBLY

 #51
20180291885
2018-10-11

VALVE PLATE AND HEAD COVER ASSEMBLY

 #52
20180266406
2018-09-20

Double-piston compressor of a compressed-air supply device

 #53
20180230984
2018-08-16

Internally cooled inline drive compressor

 #54
20180216504
2018-08-02

ELECTROMAGNETIC LINEAR MOTOR

 #55
20180209405
2018-07-26

IMPROVED PULSE-FREE METERING PUMP AND METHODS RELATING THERETO

 #56
20180187664
2018-07-05

Medical air compressor

 #57
20180119687
2018-05-03

Air compressor

 #58
20180100499
2018-04-12

Pump operable in one of quick pumping mode and high-pressure pumping mode selectively

 #59
20180087995
2018-03-29

Device for testing performance of pyro device using high-pressure air

 #60
20180066640
2018-03-08

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

 #61
20180030975
2018-02-01

INFLATING DEVICE

 #62
20180023554
2018-01-25

Compressor for discharging a medium

 #63
20170335837
2017-11-23

Connector for a compressor assembly

 #64
20170284383
2017-10-05

Double-headed piston type swash plate compressor

 #65
20170284382
2017-10-05

Double-headed piston type swash plate compressor

 #66
20170282656
2017-10-05

AIR MAINTENANCE TIRE ASSEMBLY

 #67
20170184087
2017-06-29

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

 #68
20170096997
2017-04-06

Variable capacity reciprocating compressor

 #69
20170036505
2017-02-09

Integrated air-supply unit

 #70
20160348667
2016-12-01

Method and control circuit for controlling an electrical drive of an electrically driven compressed air compressor of a motor vehicle

 #71
20160281701
2016-09-29

Method and equipment for improving the efficiency of compressors and refrigerators

 #72
20160177938
2016-06-23

Method of control of compressors with more than two capacity states

 #73
20160177932
2016-06-23

Pumping system for gaseous and liquid media

 #74
20160156235
2016-06-02

Linear motor and compressor having the same

 #75
20160107491
2016-04-21

AIR MAINTENANCE TIRE ASSEMBLY

 #76
20160069340
2016-03-10

DUAL-CHAMBER DUAL-ACTION AIR PUMP AND GLASS-WIPING ROBOT HAVING THE AIR PUMP

 #77
20160001624
2016-01-07

Compressor arrangement for compressed air supply facility

 #78
20150361970
2015-12-17

GAS COMPRESSOR

 #79
20150308424
2015-10-29

Systems and devices including valves coupled to electric devices and methods of making, using, and operating the same

 #80
20150239309
2015-08-27

Tire inflation apparatus

 #81
20150233362
2015-08-20

Turn-back coaxial gas pressurizing pump and gas pressurizing method

 #82
20150139839
2015-05-21

Scotch yoke arrangement

 #83
20150086402
2015-03-26

PUMP DEVICE

 #84
20150078932
2015-03-19

Drive mechanism for rotary compressors or pumps

 #85
20140369873
2014-12-18

Compressor for pressurized fluid output

 #86
20140154107
2014-06-05

Apparatuses, Systems, and Methods for Improved Performance of a Pressurized System

 #87
20130142683
2013-06-06

Electric motor thermal energy isolation

 #88
20130108487
2013-05-02

Air-cooled reciprocating compressor having special cooling air conduction

 #89
20120192710
2012-08-02

Oil-free air compressor for rail vehicles

 #90
20120023973
2012-02-02

METHOD AND EQUIPMENT FOR IMPROVING THE EFFICIENCY OF COMPRESSORS AND REFRIGERATORS

 #91
20110120242
2011-05-26

Scotch yoke arrangement

 #92
20110070113
2011-03-24

System and devices including valves coupled to electric devices and methods of making, using, and operating the same

 #93
20110070106
2011-03-24

AIR COMPRESSOR STRUCTURE

 #94
20110020156
2011-01-27

GASEOUS FLUID PUMP

 #95
20110020143
2011-01-27

Method of controlling gaseous fluid pump

 #96
20100247334
2010-09-30

Piston systems having a flow path between piston chambers, pumps including a flow path between piston chambers, and methods of driving pumps

 #97
20100178185
2010-07-15

Fluid intake and exhaust fittings for a compressor or pump

 #98
20100150746
2010-06-17

COMPRESSOR

 #99
20100111713
2010-05-06

APPARATUSES, SYSTEMS, AND METHODS FOR IMPROVED PERFORMANCE OF A PRESSURIZED SYSTEM

 #100
20090104052
2009-04-23

Pump

 #101
20070280838
2007-12-06

Dual-cylinder rocking piston compressor

 #102
20070068468
2007-03-29

Rotary to reciprocal power transfer device

 #103
20070022759
2007-02-01

Dynamic system for refrigeration equipment

 #104
20060275160
2006-12-07

PUMP IMPROVEMENTS

 #105
20060127231
2006-06-15

Portable, refrigerant recovery unit

 #106
20050112002
2005-05-26

Crankcase sealing apparatus

 #107
20050100458
2005-05-12

Pump with transfer tube

 #108
20050098222
2005-05-12

Flapper valve mounting structure

 #109
20050074351
2005-04-07

Pump cylinder seal

 #110
20050069431
2005-03-31

Piston mounting and balancing system

 #111
20050042112
2005-02-24

Piston type gas compressor, and piston type gas pressure drive rotation device

 #112
19018992
2025-11-11

Full-sealing positive pressure and negative pressure integrated oil-free compressor for oxygen generation

 #113
15384977
2019-10-15

Gas compressor compressing well head casing gas