ClassID:

143663

F04C28/04 - CPC Classification

Classification description:

Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids specially adapted for reversible pumps

Recent Application in this class:
#1
20250264101
2025-08-21

SCROLL COMPRESSOR

#2
20240051367
2024-02-15

PRE-PRESSURIZED SYSTEM WITH REVERSE ROTATION OF PUMP FOR VALVE ACTUATION

#3
20230136689
2023-05-04

PUMP WITH VARIABLE SUCTION/DISCHARGE AMOUNT AND DRIVE DEVICE COMPOSED OF THE PUMP AND DRIVING METHOD THEREOF

#4
20210123450
2021-04-29

Electric compressor system for vehicle

#5
20200116406
2020-04-16

Methods and systems for preventing premature compressor failure from improper operation

#6
20200014277
2020-01-09

Portable fuel pump

#7
20190338773
2019-11-07

Rotary displacement compressor having a check valve and a backflow control valve arranged in series through a discharge pipe

#8
20180320943
2018-11-08

Methods and systems for preventing premature compressor failure from improper operation

#9
20170248019
2017-08-31

HYDROELECTRIC GEAR PUMP WITH VARYING HELIX ANGLES OF GEAR TEETH

#10
20170227273
2017-08-10

Controls and operation of variable frequency drives

#11
20170201146
2017-07-13

Portable fuel pump

#12
20170122320
2017-05-04

Device for compressing and expanding a gas and method for controlling the pressure in two grids of a different nominal pressure level

#13
20150377536
2015-12-31

Controls and operation of variable frequency drives

#14
20150267701
2015-09-24

Motor-pump unit

#15
20150110658
2015-04-23

Pump with pivoted vanes

#16
20120224986
2012-09-06

Rotary vane compressor

#17
20100310399
2010-12-09

Self-Triggering Rotor for Pneumatic Paddle Motor

#18
20100028189
2010-02-04

Rotary pump with vane support divided into two half shells

#19
20090004039
2009-01-01

Single stage root type-vacuum pump and vacuum fluid transport system employing the single stage root type-vacuum pump

#20
20080107556
2008-05-08

Rotary compressor for changing compression capacity

#21
20070280843
2007-12-06

Rotary compressor for changing compression capacity

#22
20070180841
2007-08-09

System for controlling compressor of cooling system and method for controlling the same

#23
20070160486
2007-07-12

Variable capacity rotary compressor

#24
20070154328
2007-07-05

Rotary compressor

#25
20070122284
2007-05-31

Rotary compressor having two compression capacities

#26
20070068181
2007-03-29

Method of controlling compressor for refrigerator and apparatus thereof

#27
20070003423
2007-01-04

Variable capacity rotary compressor

#28
20060222543
2006-10-05

Variable capacity rotary compressor

#29
20060222510
2006-10-05

Prevention of unpowered reverse rotation in compressors

#30
20060210418
2006-09-21

Variable capacity rotary compressor

#31
20060093503
2006-05-04

Variable capacity rotary compressor

#32
20060034720
2006-02-16

Variable capacity rotary compressor

#33
20050207925
2005-09-22

Variable capacity rotary compressor

#34
20050129551
2005-06-16

Variable capacity rotary compressor

#35
20050112010
2005-05-26

Variable capacity rotary compressor

#36
20050112009
2005-05-26

Variable capacity rotary compressor

#37
20050112008
2005-05-26

Variable capacity rotary compressor

#38
20050079071
2005-04-14

Variable capacity rotary compressor

#39
20050069441
2005-03-31

Variable capacity rotary compressor

#40
20050031463
2005-02-10

Continuous variable suction system

#41
20050019193
2005-01-27

Variable capacity rotary compressor

#42
20050019192
2005-01-27

Variable capacity rotary compressor

#43
20050019191
2005-01-27

Variable capacity rotary compressor

#44
20050019190
2005-01-27

Variable capacity rotary compressor

#45
20050019189
2005-01-27

Variable capacity rotary compressor

#46
20050002815
2005-01-06

Variable capacity rotary compressor

#47
20050002814
2005-01-06

Variable capacity rotary compressor

#48
20050002813
2005-01-06

Variable capacity rotary compressor