ClassID:

143511

F04C14/20 - CPC Classification

Classification description:

Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber by changing the form of the inner or outer contour of the working chamber

Recent Application in this class:
#1
20210246899
2021-08-12

Rotary pump having an adjustable specific delivery volume and a pressure equalization surface

#2
20200291948
2020-09-17

Compressor and air conditioner

#3
20190255250
2019-08-22

Dual chamber and gear pump assembly for a high pressure delivery system

#4
20190085843
2019-03-21

Rotary pump driven medicament delivery device

#5
20180266181
2018-09-20

STIFFNESS TUNING AND DYNAMIC FORCE BALANCING ROTORS OF DOWNHOLE DRILLING MOTORS

#6
20180106152
2018-04-19

Hydraulic machine

#7
20170328364
2017-11-16

Adjustable vane pump

#8
20170276132
2017-09-28

VARIABLE DISPLACEMENT VANE PUMP

#9
20170268505
2017-09-21

Eccentric screw pump with split stator housing

#10
20170218953
2017-08-03

VARIABLE-CAPACITY VANE PUMP

#11
20170082105
2017-03-23

Pump provided with a system for compensating the internal pressure

#12
20160238003
2016-08-18

VARIABLE CAPACITY-TYPE GEAR PUMP DESIGNING METHOD, DESIGN SUPPORT PROGRAM FOR THE PUMP, DESIGN SUPPORT DEVICE FOR THE PUMP, AND VARIABLE CAPACITY-TYPE GEAR PUMP

#13
20160177948
2016-06-23

Rotary pump with a compact setting structure for adjusting the delivery volume

#14
20150240808
2015-08-27

Variable displacement vane pump

#15
20150057612
2015-02-26

Dual chamber and gear pump assembly for a high pressure delivery system

#16
20140158426
2014-06-12

Apparatus and method for adjusting power units of downhole motors

#17
20120141315
2012-06-07

External Gear Pump

#18
20110268596
2011-11-03

Fluid device with flexible ring

#19
20110184348
2011-07-28

Dual chamber and gear pump assembly for a high pressure delivery system

#20
20100154402
2010-06-24

Flow rate control device of hydraulic pump in power steering system

#21
20090148324
2009-06-11

Variable displacement vane pump

#22
20050036897
2005-02-17

Rotary vane pump seal