ClassID:

143671

F04C28/16 - CPC Classification

Classification description:

Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by changing the positions of the inlet or outlet openings with respect to the working chamber using lift valves

Recent Application in this class:
#1
20260028990
2026-01-29

Compressor Having Capacity Modulation System

#2
20260028989
2026-01-29

Compressor Having Capacity Modulation System

#3
20260028988
2026-01-29

Compressor Having Capacity Modulation System

#4
20250327449
2025-10-23

Compressor Having Capacity Modulation System

#5
20240352935
2024-10-24

Compact variable volume index valve for screw compressor background

#6
20240052836
2024-02-15

Scroll compressor with center hub

#7
20210131434
2021-05-06

Positive-displacement compressor having an automatic compression ratio-adjustment system

#8
20190360489
2019-11-28

Scroll compressor having a valve assembly controlling the opening/closing valve to open and close communication passage and bypass holes on fixed scroll

#9
20190101120
2019-04-04

Variable volume ratio compressor

#10
20180298903
2018-10-18

Variable-capacity mechanism of scroll compressor and scroll compressor

#11
20180245595
2018-08-30

Intermediate discharge port for a compressor

#12
20180038370
2018-02-08

Variable volume ratio compressor

#13
20180038369
2018-02-08

Variable volume ratio compressor

#14
20180030833
2018-02-01

GAS COMPRESSOR

#15
20170342983
2017-11-30

Scroll compressor that includes a non-orbiting scroll having a bypass hole

#16
20170314558
2017-11-02

Compressor having capacity modulation system

#17
20170045049
2017-02-16

Compressor

#18
20160363121
2016-12-15

Scroll compressor

#19
20160319815
2016-11-03

Compressor comprising a variable volume index valve

#20
20160273539
2016-09-22

Claw pump

#21
20160273538
2016-09-22

Variable volume ratio compressor

#22
20160258434
2016-09-08

Scroll compressor with variable volume ratio port in orbiting scroll

#23
20160025093
2016-01-28

Compressor with capacity modulation and variable volume ratio

#24
20150345493
2015-12-03

Variable volume ratio scroll compressor

#25
20150132168
2015-05-14

Gas compressor

#26
20140369878
2014-12-18

Gas compressor with discharge section and sub-discharge section

#27
20140154124
2014-06-05

Scroll compressor with variable volume ratio port in orbiting scroll

#28
20140154121
2014-06-05

Compressor with capacity modulation and variable volume ratio

#29
20130071276
2013-03-21

Valve arrangement for a scroll refrigeration compressor

#30
20120134866
2012-05-31

Mechanical compression ratio changing screw compressor

#31
20120027632
2012-02-02

Compressor with a bypass port

#32
20120009076
2012-01-12

Scroll compressor

#33
20110250085
2011-10-13

Compressor having output adjustment assembly

#34
20110038747
2011-02-17

AUTOMATIC VOLUME RATIO VARIATION FOR A ROTARY SCREW COMPRESSOR

#35
20100221133
2010-09-02

Scroll compressor having relief ports to open first and second compression chambers

#36
20100139301
2010-06-10

Temperature control through pulse width modulation

#37
20100119378
2010-05-13

ROTARY COMPRESSOR

#38
20090308471
2009-12-17

Startup bypass system for a screw compressor

#39
20090297379
2009-12-03

Compressor having output adjustment assembly including piston actuation

#40
20090277216
2009-11-12

Mounting structure of discharge valve in scroll compressor

#41
20090246062
2009-10-01

Slide valve actuation for overpressure safety

#42
20090074600
2009-03-19

Mounting structure of discharge valve in rotary compressor

#43
20070269326
2007-11-22

Dual volume-ratio scroll machine

#44
20060204380
2006-09-14

Dual volume-ratio scroll machine

#45
20060204379
2006-09-14

Dual volume-ratio scroll machine

#46
20060162356
2006-07-27

Capacity-variable air conditioner

#47
20060117790
2006-06-08

Screw compressor

#48
20060104846
2006-05-18

Scroll compressor

#49
20060099098
2006-05-11

Discharge valve system of scroll compressor

#50
20060093504
2006-05-04

Apparatus for varying capacity of scroll compressor

#51
20060057010
2006-03-16

Scroll compressor having a valved back pressure chamber and a bypass for overcompression

#52
20060051226
2006-03-09

Scroll compressor having a back-pressure chamber control valve

#53
20050019178
2005-01-27

Variable capacity scroll compressor

#54
18115355
2024-04-23

Compressor and valve assembly

#55
17886047
2023-12-19

Scroll compressor with center hub