Patents-Review.com
ClassID:

142703 ⎘

F04B7/06 - CPC Classification

Classification description:

Piston machines or pumps characterised by having positively-driven valving in which the valving is performed by pistons and cylinders coacting to open and close intake or outlet ports the pistons and cylinders being relatively reciprocated and rotated

Recent Application in this class:
#1
20250347268
2025-11-13

MECHANISM FOR ELECTRONIC ADJUSTMENT OF FLOWS IN FIXED DISPLACEMENT PUMP

 #2
20250334112
2025-10-30

CALIBRATABLE VARIABLE DISPLACEMENT PUMP

 #3
20250314247
2025-10-09

CALIBRATABLE VARIABLE DISPLACEMENT PUMP

 #4
20250075794
2025-03-06

PISTON RINGS AND BARREL SLEEVES

 #5
20240401602
2024-12-05

BREATHER TUBE FOR LABYRINTH SEAL CHAMBER

 #6
20240218860
2024-07-04

MECHANISM FOR ELECTRONIC ADJUSTMENT OF FLOWS IN FIXED DISPLACEMENT PUMP

 #7
20240218859
2024-07-04

MECHANISM FOR ELECTRONIC ADJUSTMENT OF FLOWS IN FIXED DISPLACEMENT PUMP

 #8
20240068457
2024-02-29

ROTATING RECIPROCATING PISTON PUMP WITH A BARREL CAM

 #9
20240058528
2024-02-22

Rotational metering pump for medication patch

 #10
20240009383
2024-01-11

Medical Injector Metering Pump with Interlock

 #11
20230374978
2023-11-23

Piston pump with two motor stators and one motor rotor having cam driving piston and flow distributor

 #12
20230366386
2023-11-16

Rotational metering gasket pump

 #13
20230321341
2023-10-12

PRECISION PUMP WITH AUTOMATIC VALVE SWITCHING AND LOW TOLERANCE STACK-UP USING SIDE PORTED CANNULA FOR SMALL VOLUME PUMPING

 #14
20230310737
2023-10-05

ROTATIONAL METERING PUMP FOR INSULIN PATCH

 #15
20230160376
2023-05-25

Pump body assembly and fluid machine

 #16
20230141287
2023-05-11

Fluid pump with pressure relief path

 #17
20230075848
2023-03-09

OSCILLATORY-ROTARY LIQUID DISPENSING DEVICE WITH SPRING, AND ASSOCIATED METHOD

 #18
20230058600
2023-02-23

CALIBRATABLE VARIABLE DISPLACEMENT PUMP

 #19
20220412330
2022-12-29

BALL PISTON PUMP

 #20
20220333584
2022-10-20

Micro-nutating pump assembly

 #21
20220213884
2022-07-07

Mechanism for electronic adjustment of flows in fixed displacement pump

 #22
20220160958
2022-05-26

Rotational metering pump for insulin patch

 #23
20220099074
2022-03-31

Plunger pump, liquid feeding device, and liquid chromatography device

 #24
20210353853
2021-11-18

Rotary plunger pump subsystems

 #25
20210131426
2021-05-06

PLUNGER PUMP

 #26
20210017969
2021-01-21

Micropump with cam mechanism for axial displacement of rotor

 #27
20200378375
2020-12-03

Micropump

 #28
20200362854
2020-11-19

Multi-channel positive displacement pump apparatus

 #29
20200360601
2020-11-19

Rotational metering pump for insulin patch

 #30
20200340582
2020-10-29

Piston ring, reciprocating compressor, method for selecting piston ring and method for evaluating life of piston ring

 #31
20200325880
2020-10-15

Piston/liner configuration coordination in a piston pump

 #32
20200309104
2020-10-01

Micropump

 #33
20200222626
2020-07-16

Rotational metering pump for insulin patch

 #34
20190344010
2019-11-14

Rotational metering pump for insulin patch

 #35
20190282284
2019-09-19

Pump

 #36
20190271396
2019-09-05

Rotating piston for pumps

 #37
20190226484
2019-07-25

Valve-less variable displacement pump

 #38
20190113028
2019-04-18

Rotatable piston assembly

 #39
20190101107
2019-04-04

Plunger pump having a rotatable plunger with cut face disposed in a cylinder wherein the cylinder includes a main body and a spacer section with the spacer section having a greater length in an axial direction than the maximum stroke length of the plunger

 #40
20190084753
2019-03-21

Precision fluid dispensing device

 #41
20180230993
2018-08-16

Ceramic pump and casting therefor

 #42
20180036750
2018-02-08

Fluid discharging system

 #43
20170350247
2017-12-07

Air motor and pump comprising such a motor

 #44
20170321694
2017-11-09

Pump

 #45
20170191563
2017-07-06

Rotating piston for pumps

 #46
20170191478
2017-07-06

Fluted piston components for pumps

 #47
20170184091
2017-06-29

Rotational metering pump for insulin patch

 #48
20160281505
2016-09-29

Banded ceramic valve and/or port plate

 #49
20160245275
2016-08-25

Mechanism for fine adjustment of flows in fixed displacement pump

 #50
20160195074
2016-07-07

Rotary swinging subassembly and device for cointegrated fluidic multiplexing and volumetric pumping of a fluid

 #51
20160161773
2016-06-09

Liquid crystal pump and method for ejecting liquid crystal using the same

 #52
20160153433
2016-06-02

Tri-chamber nutating pump

 #53
20160123312
2016-05-05

Fluid pump having liquid reservoir and modified pressure relief slot

 #54
20160000999
2016-01-07

Internal cam metering pump

 #55
20150248133
2015-09-03

Concentrate level sensing

 #56
20150219099
2015-08-06

Rotary-oscillating subassembly and rotary-oscillating volumetric pumping device for volumetrically pumping a fluid

 #57
20140314594
2014-10-23

Pump

 #58
20140138410
2014-05-22

Liquid dispensing system

 #59
20130189140
2013-07-25

Valveless reciprocating compressor

 #60
20130017099
2013-01-17

Micropump

 #61
20120312160
2012-12-13

Fluid pump having liquid reservoir and modified pressure relief slot

 #62
20120186518
2012-07-26

Rotary piston pump for metering a coating agent

 #63
20120126795
2012-05-24

Pump with rotor position measurement system

 #64
20100326176
2010-12-30

Method and apparatus for testing the piston of an injection pump

 #65
20100260634
2010-10-14

Volumetric Pump With Reciprocated and Rotated Piston

 #66
20100143161
2010-06-10

Quad chamber mixing pump

 #67
20100140302
2010-06-10

Device for metering out a flowable mass using a coaxial rotary piston and plunger

 #68
20090123309
2009-05-14

Micropump

 #69
20090060728
2009-03-05

Pumps and pump-heads comprising internal pressure-absorbing member

 #70
20090053086
2009-02-26

Volumetric pump with reciprocated and rotated piston

 #71
20080317611
2008-12-25

Adapter plate in a pump of a beverage system

 #72
20080317603
2008-12-25

Locking ring in a pump of a beverage system

 #73
20080310969
2008-12-18

Dual chamber mixing pump

 #74
20080298989
2008-12-04

ROTARY AND TRANSLATING DISPLACEMENT DEVICE

 #75
20080272143
2008-11-06

Concentrate level sensing

 #76
20080187449
2008-08-07

PUMP SYSTEM WITH INTEGRATED PISTON-VALVE ACTUATION

 #77
20070237658
2007-10-11

Magnetically driven valveless piston pumps

 #78
20070196223
2007-08-23

Nutating pump with reduced pulsations in output flow

 #79
20070071596
2007-03-29

Pump system

 #80
20060275159
2006-12-07

Pump for fluid supply and method for supplying fluid

 #81
20060037971
2006-02-23

Positive displacement pump

 #82
20050276705
2005-12-15

Positive displacement pump having piston and/or liner with vapor deposited polymer surface

 #83
20050173463
2005-08-11

Dispensing pump having linear and rotary actuators

 #84
20050132879
2005-06-23

Piston pump useful for aerosol generation

 #85
20050089417
2005-04-28

Positive displacement pump

 #86
20050025636
2005-02-03

Pump system for conveying lubricating oil

 #87
20050019195
2005-01-27

Rotary piston pump

 #88
20050013708
2005-01-20

Systems and methods for providing a dynamically adjustable reciprocating fluid dispenser