ClassID:

142956

F04B39/0022 - CPC Classification

Classification description:

Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups - adaptations of pistons piston rods

Recent Application in this class:
#1
20260146594
2026-05-28

WIPER RING FOR RECIPROCATING COMPRESSOR ROD PACKING

#2
20260028974
2026-01-29

COMMON-ROD SERIES HYDRAULIC COMPRESSORS

#3
20250382959
2025-12-18

PACKING CASE WITH DEGRADATION MONITORING

#4
20250369437
2025-12-04

PORTABLE BLOWING AND SUCTION AIR COMPRESSOR

#5
20250180002
2025-06-05

Piston rod mechanism for air compressor and air compressor

#6
20250163901
2025-05-22

PISTON FOR A COMPRESSOR, COMPRESSOR, AND METHOD AND REMOVAL TOOL FOR DISASSEMBLING A PISTON

#7
20250137443
2025-05-01

Pressure Relief System for a Portable Air Pump and Inflator System

#8
20250122869
2025-04-17

GREENHOUSE GAS REDUCTION WITH EXTERNALLY PRESSURIZED GAS SEAL AND GAS LUBRICATION FOR A RECIPROCATING COMPRESSOR

#9
20250012265
2025-01-09

COMPRESSED AIR COMPRESSOR AND AIR SUPPLY SYSTEM

#10
20240344508
2024-10-17

Mechanical liquid piston slow expansion compressor

#11
20240328411
2024-10-03

A RECIPROCATING COMPRESSOR WITH A PRESSURE-DROP CHAMBER AND METHOD

#12
20240280094
2024-08-22

INSTALLATION FOR PUMPING CRYOGENIC FLUID AND FILLING STATION COMPRISING SUCH AN INSTALLATION

#13
20240254981
2024-08-01

Greenhouse gas reduction with externally pressurized gas seal and gas lubrication for a reciprocating compressor

#14
20240229788
2024-07-11

PACKING CASE WITH DEGRADATION MONITORING

#15
20240159231
2024-05-16

COMPOSITE STRUCTURES FOR RECIPROCATING GAS COMPRESSOR SYSTEMS

#16
20240133374
2024-04-25

PACKING CASE WITH DEGRADATION MONITORING

#17
20240024188
2024-01-25

AIR PULSE GENERATOR

#18
20230332687
2023-10-19

Piston compressor

#19
20230243345
2023-08-03

Linear compressor

#20
20230204022
2023-06-29

Air compressor system having a hollow piston forming an interior space and a check valve in a piston crown allowing air to exit the interior space

#21
20230151809
2023-05-18

Reciprocating compressor with a jacket around the piston rod

#22
20230082868
2023-03-16

Hydraulic fracturing pumps to enhance flow of fracturing fluid into wellheads and related methods

#23
20230014696
2023-01-19

RECIPROCATING HERMETIC COMPRESSOR WITH AXIAL FLUX MOTOR

#24
20220389922
2022-12-08

Expansion chamber for progressive sealing system

#25
20220372963
2022-11-24

Piston compressor and method for operating same

#26
20220372962
2022-11-24

Packing seal for a piston compressor and method for operating same

#27
20220372857
2022-11-24

Hydraulic fracturing pumps to enhance flow of fracturing fluid into wellheads and related methods

#28
20220333589
2022-10-20

AIR COMPRESSOR

#29
20220333588
2022-10-20

Piston of air compressor

#30
20220228584
2022-07-21

EASY-TO-ASSEMBLE AIR PUMP

#31
20220196010
2022-06-23

ELASTIC BODY AND LINEAR COMPRESSOR INCLUDING THE SAME

#32
20220186720
2022-06-16

COMPRESSOR VALVE ASSEMBLY

#33
20220178359
2022-06-09

Hybrid thermodynamic compressor

#34
20220154707
2022-05-19

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

#35
20220136494
2022-05-05

Packaging ring with relief opening

#36
20220136491
2022-05-05

Double-acting reciprocating pump assembly for use in conjunction with a melter

#37
20220120347
2022-04-21

Rod packing

#38
20220106950
2022-04-07

Compressor with piston ring arrangement on piston

#39
20220074400
2022-03-10

Composite structures for reciprocating gas compressor systems

#40
20220042502
2022-02-10

PISTON COMPRESSOR AND METHOD IN WHICH SUCH A PISTON COMPRESSOR IS USED

#41
20220003225
2022-01-06

FAST INFLATING AIR PUMP

#42
20210404458
2021-12-30

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

#43
20210222684
2021-07-22

Vehicle-mounted electric oil-free air compressor

#44
20210215148
2021-07-15

METHOD AND EQUIPMENT FOR IMPROVING THE EFFICIENCY OF COMPRESSORS AND REFRIGERATORS

#45
20210215145
2021-07-15

Compressor

#46
20210172428
2021-06-10

Compressor comprising a first drive part, a second drive part, and a high-pressure part configured to move in a coupled manner by a piston rod arrangement wherein a first control unit and a second control unit are configured to control a drive fluid to the first and second drive parts

#47
20210156371
2021-05-27

Piston ring and compressor

#48
20210079949
2021-03-18

Compressor having curved connecting rods

#49
20200386218
2020-12-10

Oil wiper packing

#50
20200386217
2020-12-10

Compressor assembly for a compressed-air feed of a compressed-air supply system

#51
20200208623
2020-07-02

Pneumatic Motor Comprising Active Stroke-Switching System

#52
20200102953
2020-04-02

Air compressor

#53
20200102947
2020-04-02

Compressor, compressed air supply facility for operating a pneumatic system, and method for operating a compressed air supply facility

#54
20200102944
2020-04-02

Transmission mechanism of air compressor

#55
20200072208
2020-03-05

Two-Parts Telescopic Connecting Rod for Alternative Compressors and Method of Assembling Two-Parts Telescopic Connecting Rod in Alternative Compressors

#56
20200025189
2020-01-23

Compressor assembly for a compressed-air feed of a compressed-air supply system

#57
20200011310
2020-01-09

Mortise-tenon jointed air pump

#58
20190234402
2019-08-01

Reciprocating compressor

#59
20190234389
2019-08-01

Fluid Cylinder

#60
20190137151
2019-05-09

Reciprocating refrigeration compressor wrist pin retention

#61
20190137150
2019-05-09

Reciprocating refrigeration compressor wrist pin retention

#62
20190093646
2019-03-28

Reciprocating type compressor

#63
20190032647
2019-01-31

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

#64
20180340524
2018-11-29

Hand pump with air storage tank

#65
20180256791
2018-09-13

Reduced-pressure device

#66
20180245574
2018-08-30

Reciprocating piston compressor, a retrofit kit for a reciprocating piston compressor and the use of a connecting rod in a reciprocating piston compressor

#67
20180187664
2018-07-05

Medical air compressor

#68
20180087493
2018-03-29

Compression unit for a volumetric compressor without lubrification

#69
20180058730
2018-03-01

Stirling cooler with flexible regenerator drive

#70
20180051683
2018-02-22

Linear compressor with a ball joint coupling

#71
20180023554
2018-01-25

Compressor for discharging a medium

#72
20180010691
2018-01-11

Packing case for reciprocating machine and method of assembling the same

#73
20170373766
2017-12-28

System for piston rod monitoring

#74
20170350476
2017-12-07

COMPRESSOR FOR DISCHARGING A MEDIUM

#75
20170306941
2017-10-26

Hermetic compressor and refrigeration device

#76
20170218933
2017-08-03

Reciprocating compressor

#77
20170218932
2017-08-03

Plunger clamp for fluid end

#78
20170211562
2017-07-27

Linear compressor

#79
20170184084
2017-06-29

Two parts telescopic connecting rod for alternative compressors and method of assembling two-parts telescopic connecting rod in alternative compressors

#80
20170167478
2017-06-15

Reciprocating integral linear engine compressor

#81
20170145993
2017-05-25

PUMPING DEVICE

#82
20170122301
2017-05-04

Connecting rod with modified end

#83
20170082096
2017-03-23

Reciprocating Refrigeration Compressor and Method for Mounting a Reciprocating Refrigeration Compressor

#84
20170009758
2017-01-12

SEALED COMPRESSOR AND REFRIGERATION DEVICE

#85
20160377076
2016-12-29

State monitoring system of moving apparatus

#86
20160363115
2016-12-15

Reciprocating pump assembly

#87
20160341189
2016-11-24

Connecting rod-piston assembly comprising a connecting rod having a spherical small end

#88
20160281707
2016-09-29

Crosshead-piston rod assembly for a reciprocating compressor

#89
20160281701
2016-09-29

Method and equipment for improving the efficiency of compressors and refrigerators

#90
20160265659
2016-09-15

CROSSHEAD FOR A PISTON ROD

#91
20160263949
2016-09-15

Automatic truck assembly tire inflator system with dual pump

#92
20160245274
2016-08-25

Reciprocating compressor, compression section unit, and maintenance method of reciprocating compressor

#93
20160222954
2016-08-04

Reciprocating compressor

#94
20160195078
2016-07-07

COMPRESSOR

#95
20160153445
2016-06-02

Gas operated booster pump

#96
20160138584
2016-05-19

Reciprocating compressor, pressure packing, and method

#97
20160108908
2016-04-21

Compressor and crankshaft-connecting rod assembly

#98
20160051740
2016-02-25

Magnet-based systems and methods for transferring fluid

#99
20160010637
2016-01-14

Air Pump with Low Pressure Gauge Protective Device

#100
20150377227
2015-12-31

IMPROVEMENT IN A PISTON FOR A REFRIGERATION COMPRESSOR

#101
20150369232
2015-12-24

Crank-driven arrangement for a piston compressor

#102
20150369226
2015-12-24

PUMPING DEVICE

#103
20150354552
2015-12-10

Hermetic compressor and refrigerator

#104
20150337823
2015-11-26

Lubricant-Free Compressor Having a Graphite Piston in a Glass Cylinder

#105
20150330381
2015-11-19

Compressor bushing

#106
20150330379
2015-11-19

Air compressor with improved rotating device

#107
20150330378
2015-11-19

Suction muffler located inside a piston of a linear compressor

#108
20150322937
2015-11-12

OIL-FREE COMPRESSOR CRANKCASE COOLING ARRANGEMENT

#109
20150316044
2015-11-05

Discharge reed valve for reciprocating refrigeration compressor

#110
20150240798
2015-08-27

RECIPROCATING COMPRESSOR

#111
20150219374
2015-08-06

Reciprocating refrigeration compressor wrist pin retention

#112
20150211514
2015-07-30

Piston rod for a piston compressor, and the piston compressor

#113
20150098849
2015-04-09

Electromagnetic actuator for a reciprocating compressor

#114
20150040752
2015-02-12

Connecting rod/piston arrangement for alternative compressor and process for assembling connecting rod/piston arrangement for alternative compressor

#115
20140327328
2014-11-06

Deformation control device for a resonant spring in a linear driving unit

#116
20140322043
2014-10-30

Reciprocating compressor

#117
20140294636
2014-10-02

Reciprocating compressor

#118
20140234146
2014-08-21

Connecting rod valve

#119
20140202326
2014-07-24

Mounting arrangement for a piston-connecting rod assembly in a refrigeration compressor

#120
20140140869
2014-05-22

Pneumatic reciprocating fluid pump with reinforced shaft

#121
20140060319
2014-03-06

Adjustable linkage for variable displacement

#122
20130337221
2013-12-19

COATED MEMBER FOR MOVEMENT RELATIVE TO A SURFACE AND METHOD FOR MAKING THE COATED MEMBER

#123
20130205993
2013-08-15

Adaptive hydraulic cylinder with floating seal interface

#124
20130052056
2013-02-28

Hermetic compressor

#125
20120312105
2012-12-13

MECHANISM FOR TRANSFORMING CIRCULAR MOTION INTO TRANSLATIONAL MOTION TO DRIVE THE PISTON OF A CNG COMPRESSOR

#126
20120183423
2012-07-19

Block for a reciprocating refrigeration compressor

#127
20120151911
2012-06-21

COMBINATION OF A CHAMBER AND A PISTON, A PUMP, A MOTOR, A SHOCK ABSORBER AND A TRANSDUCER INCORPORATING THE COMBINATION

#128
20120107148
2012-05-03

Hermetic compressor

#129
20120023973
2012-02-02

METHOD AND EQUIPMENT FOR IMPROVING THE EFFICIENCY OF COMPRESSORS AND REFRIGERATORS

#130
20110298183
2011-12-08

Sealing arrangement for sealing a piston rod of a reciprocating compressor

#131
20110277626
2011-11-17

Rocking piston type compressor

#132
20110232416
2011-09-29

Anti-abrasion device and reciprocating compressor having the same

#133
20110132190
2011-06-09

PISTON MACHINE FOR USE AS A VACUUM PUMP FOR MEDICAL PURPOSES

#134
20110103727
2011-05-05

ARRANGEMENT AND PROCESS FOR MOUNTING AN AXIAL BEARING IN A HERMETIC COMPRESSOR

#135
20100322790
2010-12-23

Reciprocating compressor

#136
20100319547
2010-12-23

Reciprocating compressor and oxygen concentrator

#137
20100310396
2010-12-09

Arrangement and process for mounting a resonant spring in a refrigeration compressor

#138
20100247357
2010-09-30

Device comprising a combination of a chamber and a piston

#139
20100170391
2010-07-08

Combination of a chamber and a piston, a pump, a motor, a shock absorber and transducer incorporating the combination

#140
20100166583
2010-07-01

Air compressor

#141
20100162733
2010-07-01

Linear Compressor With Preloaded Spring Piston Rod, and Refrigerating Machine

#142
20100129244
2010-05-27

HERMETIC COMPRESSOR

#143
20100040495
2010-02-18

PISTON-DRIVING ROD ARRANGEMENT FOR RECIPROCATING COMPRESSOR

#144
20100034679
2010-02-11

REFRIGERANT COMPRESSOR, PISTON OF A REFRIGERANT COMPRESSOR AND PISTON ARRANGEMENT

#145
20090214361
2009-08-27

OIL-LESS COMPRESSOR WITH SEAL-DUST PROTECTION

#146
20090123305
2009-05-14

Detachable connecting rod and compressor having the same

#147
20080276737
2008-11-13

Crank Gear for a Reciprocating Compressor

#148
20080202247
2008-08-28

Method for prevention/detection of mechanical overload in a reciprocating gas compressor

#149
20080152520
2008-06-26

Hermetic compressor

#150
20080145247
2008-06-19

Hermetic compressor

#151
20080134833
2008-06-12

Driving Rod For The Piston Of A Reciprocating Compressor

#152
20080118375
2008-05-22

Axially Driven Piston-Cylinder Unit

#153
20080080993
2008-04-03

Hermetic compressor

#154
20080022850
2008-01-31

Compressor

#155
20080003119
2008-01-03

Radial type reciprocating compressor and portable tool powering system with flexing connecting rod arrangement

#156
20080003112
2008-01-03

Radial type reciprocating compressor and portable tool powering system with cylinder liner, valve and annular manifold arrangement

#157
20070292282
2007-12-20

RECIPROCATING COMPRESSOR OR PUMP AND A PORTABLE TOOL POWERING SYSTEM INCLUDING A RECIPROCATING COMPRESSOR

#158
20070227349
2007-10-04

Connecting rod for hermetic compressor

#159
20070028763
2007-02-08

Hermetic compressor

#160
20060180019
2006-08-17

Piston balancing system

#161
20060032370
2006-02-16

Combination of a chamber and a piston, a pump, a motor, a shock absorber and a transducer incorporating the combination

#162
20060013715
2006-01-19

Crimped piston to rod joint

#163
20050287026
2005-12-29

Low density counterweight for eccentric driven pump

#164
20050238513
2005-10-27

Double piston for a compressor

#165
20050175489
2005-08-11

Piston pump

#166
20050129543
2005-06-16

Compressor assembly with reciprocating piston and vented cylinder

#167
20050129542
2005-06-16

Compressor assembly with piston having multiple cross sections

#168
20050123422
2005-06-09

Reciprocating compressor driven by a linear motor

#169
20050123411
2005-06-09

Piston compressor

#170
20050115403
2005-06-02

Reciprocating compressor with a pressed fit bushing

#171
18809401
2025-11-11

Inflator

#172
15384977
2019-10-15

Gas compressor compressing well head casing gas