Patents-Review.com
ClassID:

144396 ⎘

F04F1/02 - CPC Classification

Classification description:

Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped using both positively and negatively pressurised fluid medium, e.g. alternating

Sub-classes:
Recent Application in this class:
#1
20250188955
2025-06-12

Motionless Molten Salt Pump on Leverage of Pressure Variation Force

 #2
20250091047
2025-03-20

FLUID CONTROL

 #3
20230320553
2023-10-12

DRAINAGE PUMP STRUCTURE AND CLEANING BASE STATION

 #4
20230152073
2023-05-18

Transport of explosives

 #5
20220410057
2022-12-29

MACRO ANTI-FOULING SCREEN FUNCTIONING IN MULTI-DIRECTIONAL FLOW

 #6
20210402388
2021-12-30

Fluid control

 #7
20210301836
2021-09-30

Method and Device for Compressing a Gas

 #8
20200200191
2020-06-25

SIMPLE PNEUMATIC EJECTOR PUMP WITH EXHAUST VALVE FOR CONTINUOUS FLOW AIR SOURCE SYSTEM AND METHOD OF USE

 #9
20200088213
2020-03-19

Pressure-controlling device, and pressure-using apparatus

 #10
20200072248
2020-03-05

Multifunctional air extraction boosting pump

 #11
20190293092
2019-09-26

High-density powder pump

 #12
20190160460
2019-05-30

Fluid control

 #13
20190023505
2019-01-24

Dense phase powder pump and corresponding operating method

 #14
20180283406
2018-10-04

METHOD AND DEVICE FOR PUMPING A PRODUCT BY SUCTION

 #15
20180066766
2018-03-08

Fluid transfer device based on pneumatic sucking and expelling

 #16
20170321725
2017-11-09

Pneumatic pump

 #17
20170016458
2017-01-19

Simple Positive Displacement Pump Suitable for Pharmaceutical, Chemical, Biological, Viscous, Dense, Particulate Laden Fluids and Other Demanding Applications

 #18
20160312804
2016-10-27

Sterile liquid pump with single use elements

 #19
20160312803
2016-10-27

Sterile liquid pump with single use elements

 #20
20160160880
2016-06-09

Pneumatic distribution system using shared pump plenum

 #21
20160122138
2016-05-05

Powder conveyor and associated operating method

 #22
20160052000
2016-02-25

Dense phase powder pump and corresponding operating method

 #23
20150275925
2015-10-01

Hydraulic circuit supply system

 #24
20150020542
2015-01-22

Underwater gas field development methods and systems

 #25
20140034168
2014-02-06

Pressure balanced rotation spool valve

 #26
20130118362
2013-05-16

Compression of a water-saturated medium

 #27
20120275944
2012-11-01

Airflow passage structure of manual pump of fluid-pumping apparatus

 #28
20120116099
2012-05-10

Method of conveying liquids

 #29
20120114507
2012-05-10

Balancing liquid pumping system

 #30
20110300004
2011-12-08

Pumping system and method

 #31
20110091333
2011-04-21

Pneumatic evacuation pump

 #32
20100196169
2010-08-05

Pump apparatus

 #33
20090180899
2009-07-16

Device, and method for feeding substances

 #34
20090162150
2009-06-25

DEVICE, AND METHOD FOR FEEDING SUBSTANCES

 #35
20090047139
2009-02-19

Method and system for raising a liquid using a pressurised gas and a buoyant, movable interface member

 #36
20090028721
2009-01-29

System for dewatering boreholes by means of alternative cycles of vacuum and exhaust, based on the principle of pneumatic displacement

 #37
20080075606
2008-03-27

Pump apparatus

 #38
20070258830
2007-11-08

Pump

 #39
20070251585
2007-11-01

Fluid distribution system

 #40
20070023365
2007-02-01

Pumping device

 #41
20060210404
2006-09-21

Pivoting mechanism for use in a high temperature steam distribution system

 #42
20060196884
2006-09-07

Control of fluid conditions in bulk fluid distribution systems

 #43
20060185671
2006-08-24

Powder conveying pump

 #44
20050226734
2005-10-13

Gas pressure driven fluid pump having an electronic cycle counter and method

 #45
20050207901
2005-09-22

Pump for transferring particulate material

 #46
20050016588
2005-01-27

Vacuum station and the method for operating the same

 #47
16376719
2020-02-11

Pumping systems and methods