Patents-Review.com
ClassID:

142658 ⎘

F04B3/00 - CPC Classification

Classification description:

Machines or pumps with pistons coacting within one cylinder, e.g. multi-stage

Sub-classes:
Recent Application in this class:
#1
20250237205
2025-07-24

FLUID COMPRESSION APPARATUS AND METHOD

 #2
20250237201
2025-07-24

FLUID COMPRESSION APPARATUS AND METHOD

 #3
20250188914
2025-06-12

FLUIDIC METHODS AND DEVICES

 #4
20230085780
2023-03-23

Compression apparatus and filling station comprising such an apparatus

 #5
20230012746
2023-01-19

Fluidic methods and devices

 #6
20200116139
2020-04-16

Fluidic methods and devices

 #7
20200063727
2020-02-27

Methods and devices for fluid driven adult devices

 #8
20190368480
2019-12-05

Push-pull compressor having ultra-high efficiency for cryocoolers or other systems

 #9
20190048863
2019-02-14

Push-pull compressor having ultra-high efficiency for cryocoolers or other systems

 #10
20180195510
2018-07-12

Dual-stage pump with switching valve

 #11
20180135608
2018-05-17

Plural component proportioner comprising a first pump and a second pump simultaneously driven by a motor connected to the pumps by a yoke assembly comprising a shoe, a tie plate including a slot, and a tie rod

 #12
20180087445
2018-03-29

Hybrid opposed-piston engine system

 #13
20180055994
2018-03-01

Method of priming a medical pump

 #14
20170254328
2017-09-07

Method for operating a multi-phase pump and apparatus therefor

 #15
20170159682
2017-06-08

Devices having a volume-displacing ferrofluid piston

 #16
20170159639
2017-06-08

HYDRAULIC ROTARY MACHINE

 #17
20170159638
2017-06-08

HYDRAULIC ROTARY MACHINE

 #18
20170027810
2017-02-02

Fluidic methods and devices

 #19
20160348671
2016-12-01

Fluid flow rate multiplier

 #20
20160252004
2016-09-01

Hybrid opposed-piston engine system

 #21
20160222951
2016-08-04

Pump having inlet reservoir with vapor-layer standpipe

 #22
20160053749
2016-02-25

Pressure intensification device

 #23
20150361741
2015-12-17

High Pressure Downhole Pump Assembly

 #24
20150354557
2015-12-10

Reciprocating low-speed heavy-load hydraulic pump with variable action area

 #25
20150337832
2015-11-26

Vibration-reducing structure for four-compression-chamber diaphragm pump

 #26
20150337820
2015-11-26

Five-compressing-chamber diaphragm pump with multiple effects

 #27
20150337819
2015-11-26

Roundel structure for five-compressing-chamber diaphragm pump

 #28
20150337818
2015-11-26

Vibration-reducing structure for five-compressing-chamber diaphragm pump

 #29
20150337817
2015-11-26

Roundel structure for four-compression-chamber diaphragm pump with multiple effects

 #30
20150337816
2015-11-26

Eccentric roundel structure for compressing diaphragm pump with multiple effects

 #31
20150275869
2015-10-01

Pumping system with plunger having a shaped edge and coating

 #32
20150273137
2015-10-01

CONTINUOUS FLUID DELIVERY SYSTEM AND METHOD

 #33
20150240812
2015-08-27

METHOD FOR CONVEYING HYDRAULIC FLUID, AND ELECTROHYDRAULIC MOTOR-PUMP UNIT THEREFOR

 #34
20150226214
2015-08-13

Method for operating a multi-phase pump and apparatus therefor

 #35
20150098849
2015-04-09

Electromagnetic actuator for a reciprocating compressor

 #36
20140301865
2014-10-09

HYBRIDIZED COMPRESSOR

 #37
20140088468
2014-03-27

Methods and devices for fluid driven adult devices

 #38
20140088351
2014-03-27

Fluidic methods and devices

 #39
20130343934
2013-12-26

Double acting fluid pump with spring biased piston

 #40
20130287615
2013-10-31

Pressure intensifier

 #41
20130121862
2013-05-16

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

 #42
20130014576
2013-01-17

High pressure and flow rate pump useful in formation fluid sample testing

 #43
20120301328
2012-11-29

Multistage piston compressor

 #44
20120282118
2012-11-08

Reciprocation pump and a dialysis apparatus equipped with the reciprocation pump

 #45
20120266749
2012-10-25

Reciprocation pump and a dialysis apparatus equipped with the reciprocation pump

 #46
20120265128
2012-10-18

Continuously conveying infusion pump

 #47
20120189475
2012-07-26

Device and method for pumping flowable masses

 #48
20120063939
2012-03-15

High pressure pump including hollow stud

 #49
20120034119
2012-02-09

Double acting fluid pump

 #50
20110316359
2011-12-29

BISTABLE LINEAR MOTOR

 #51
20110073620
2011-03-31

Twisting translational displacement pump cartridge

 #52
20110002802
2011-01-06

Continuous fluid delivery system

 #53
20100278668
2010-11-04

FLUID PUMP ASSEMBLY

 #54
20100166573
2010-07-01

HIGH-PRESSURE GENERATION DEVICE

 #55
20090257896
2009-10-15

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

 #56
20090220364
2009-09-03

Reciprocating-piston compressor having non-contact gap seal

 #57
20090126696
2009-05-21

Fluid pump

 #58
20080118376
2008-05-22

Translational displacement pump and bulk fluid re-supply system

 #59
20070261677
2007-11-15

Paired-piston linear engine

 #60
20070234717
2007-10-11

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

 #61
20070166173
2007-07-19

Multi-stage, multi-phase unitized linear liquid entrained-phase transfer apparatus

 #62
20070022759
2007-02-01

Dynamic system for refrigeration equipment

 #63
20060083626
2006-04-20

Compressor and hermetic housing with minimal housing ports

 #64
20050025636
2005-02-03

Pump system for conveying lubricating oil

 #65
15219084
2019-08-06

Gradient high pressure syringe pump