Patents-Review.com
ClassID:

143677 ⎘

F04C28/26 - CPC Classification

Classification description:

Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valves using bypass channels

Sub-classes:
Recent Application in this class:
#1
20250382962
2025-12-18

FIXED SCROLL ASSEMBLY AND SCROLL COMPRESSOR

 #2
20250341263
2025-11-06

ELECTRO-MAGNETIC THROTTLE VALVE WITH INTEGRATED BLOWDOWN CONDUIT

 #3
20250270995
2025-08-28

ELECTRIC COMPRESSOR WITH PASSIVE PRESSURE SYSTEM BETWEEN HIGH AND LOW PRESSURE REGIONS

 #4
20250243861
2025-07-31

SCROLL COMPRESSOR HAVING OVERHEATING PREVENTION DEVICE

 #5
20250129785
2025-04-24

COMPRESSOR

 #6
20240410629
2024-12-12

COMPRESSOR AND REFRIGERATION CYCLE DEVICE HAVING THE SAME

 #7
20240369062
2024-11-07

DEVICE FOR COMPRESSING A GASEOUS FLUID AND METHOD FOR OPERATING THE DEVICE

 #8
20240328530
2024-10-03

ELECTRO-MAGNETIC THROTTLE VALVE

 #9
20240280102
2024-08-22

Vapor injection structure for a compressor

 #10
20240218881
2024-07-04

Compressor With Shutdown Assembly

 #11
20240218879
2024-07-04

STATOR FOR A VACUUM PUMP

 #12
20240218877
2024-07-04

STATOR FOR A VACUUM PUMP

 #13
20240102469
2024-03-28

Retainer block bypass hole valve assembly arranged in non-orbiting scroll of a compressor

 #14
20240051367
2024-02-15

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

 #15
20240035474
2024-02-01

Scroll compressor including grooved discharge and bypass valve arrangement

 #16
20230400022
2023-12-14

Scroll compressor having at least one valve fixedly inserted into block insertion groove of non-orbiting scroll

 #17
20230366391
2023-11-16

GAS COMPRESSOR

 #18
20230220845
2023-07-13

Pump system, use of a pneumatic resistance and medical device or gas-measuring device

 #19
20230213033
2023-07-06

Scroll compressor with a pressure relief low-speed rotation structure

 #20
20230204033
2023-06-29

Scroll structure and compressor with back pressure plate and floating plate

 #21
20230193902
2023-06-22

Scroll compressor

 #22
20230146497
2023-05-11

Water-ring vacuum pump including built-in hogging flow path

 #23
20230123953
2023-04-20

Compressor having floating seal assembly

 #24
20230096279
2023-03-30

VACUUM SYSTEM HAVING CONDENSER AND ROOT VACUUM PUMP SET

 #25
20230037942
2023-02-09

Aerostatic thrust bearing and method of aerostatically supporting a thrust load in a scroll compressor

 #26
20230003221
2023-01-05

Scroll compressor with bypass portions

 #27
20230003208
2023-01-05

Redundant pumping system and pumping method by means of this pumping system

 #28
20220412352
2022-12-29

Compressor having orbiting scroll supply hole to lubricate thrust surface

 #29
20220381243
2022-12-01

Scroll compressor

 #30
20220341426
2022-10-27

Heat recovery device

 #31
20220299035
2022-09-22

Vacuum pump comprising a relief valve and a method of assembly of the relief valve

 #32
20220299030
2022-09-22

Pump unit

 #33
20220290672
2022-09-15

Compressor and refrigeration system

 #34
20220170465
2022-06-02

Refrigerant bypass solution

 #35
20220163027
2022-05-26

Compressor system, and control method for same

 #36
20220146171
2022-05-12

Compressor and refrigeration cycle device having the same

 #37
20220136508
2022-05-05

Scroll compressor having sealed-oil interception structure

 #38
20220074414
2022-03-10

Method for controlling a compressor towards an unloaded state

 #39
20220034320
2022-02-03

Dual-cylinder two-stage variable cpacity compressor

 #40
20220025884
2022-01-27

High pressure scroll compressor

 #41
20220010796
2022-01-13

Rotary compressor and refrigeration cycle device

 #42
20210340982
2021-11-04

Compressor having floating seal assembly

 #43
20210285445
2021-09-16

Vapor injection double reed valve plate

 #44
20210270269
2021-09-02

Slide valve, slide valve adjustment mechanism and screw compressor

 #45
20210190070
2021-06-24

Compressor having capacity modulation assembly

 #46
20210079915
2021-03-18

ELECTRONIC CAPACITY CONTROL VALVE FOR PORTABLE SCREW COMPRESSOR

 #47
20200386231
2020-12-10

Liquid-injected screw compressor

 #48
20200340476
2020-10-29

Scroll compressor

 #49
20200291948
2020-09-17

Compressor and air conditioner

 #50
20200240410
2020-07-30

Scroll compressor with bypass portions

 #51
20200063737
2020-02-27

Asymmetrical scroll compressor

 #52
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

 #53
20190360487
2019-11-28

Multi-stage vacuum booster pump coupling

 #54
20190353164
2019-11-21

Compressor having capacity modulation assembly

 #55
20190249667
2019-08-15

Scroll compressor that includes a non-orbiting scroll member having a connection passage portion connected first valve assembly and second valve assembly

 #56
20190219055
2019-07-18

Scroll compressor having a capacity variable device

 #57
20190186491
2019-06-20

Variable volume ratio compressor

 #58
20190078567
2019-03-14

Scroll compressor with bypass portions

 #59
20180363657
2018-12-20

Aerostatic thrust bearing and method of aerostatically supporting a thrust load in a scroll compressor

 #60
20180363651
2018-12-20

Scroll compressor

 #61
20180363649
2018-12-20

Scroll compressor having sub-discharge port with involute-shaped opening

 #62
20180356128
2018-12-13

Converting compressor to variable VI compressor

 #63
20180313589
2018-11-01

System and method for device under test cooling using digital scroll compressor

 #64
20180298903
2018-10-18

Variable-capacity mechanism of scroll compressor and scroll compressor

 #65
20180291902
2018-10-11

Method for controlling a rotary screw compressor

 #66
20180231000
2018-08-16

COMPRESSOR AND HEAT EXCHANGE SYSTEM

 #67
20180216618
2018-08-02

Scroll compressor having a capacity variable device

 #68
20180209422
2018-07-26

Scroll compressor having a capacity variable device

 #69
20180187682
2018-07-05

Scroll compressor having a capacity variable device

 #70
20180156215
2018-06-07

Rotary compressor and refrigeration cycle device having same

 #71
20180112666
2018-04-26

VACUUM PUMP SYSTEM

 #72
20180112588
2018-04-26

Method of supercharging an internal combustion engine

 #73
20180106184
2018-04-19

Screw air compressor with bypass

 #74
20180023516
2018-01-25

Natural gas fueled vehicle

 #75
20180017060
2018-01-18

Variable volume ratio compressor

 #76
20180010598
2018-01-11

Hydraulic pump and respective multifunction valve

 #77
20170342984
2017-11-30

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

 #78
20170342983
2017-11-30

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

 #79
20170342978
2017-11-30

Capacity-modulated scroll compressor

 #80
20170306952
2017-10-26

Scroll compressor with bypass portions

 #81
20170248356
2017-08-31

High pressure compressor and refrigerating machine having a high pressure compressor

 #82
20170248353
2017-08-31

High pressure compressor and refrigerating machine having a high pressure compressor

 #83
20170241419
2017-08-24

Hermetic compressor having a thermal activated valve

 #84
20170241417
2017-08-24

Scroll compressor

 #85
20170184093
2017-06-29

Pump system, use of a pneumatic resistance and medical device or gas-measuring device

 #86
20170146265
2017-05-25

Compressor and refrigeration cycle device using same

 #87
20170138641
2017-05-18

Compressor and refrigeration cycle device using same

 #88
20170122319
2017-05-04

Vacuum pump system

 #89
20170122317
2017-05-04

Horizontal step scroll compressor with bypass ports

 #90
20170045048
2017-02-16

Multi-stage pump assembly having a pressure controlled valve for controlling recirculation of fluid from the pump stage outlet to the pump stage inlet

 #91
20170030354
2017-02-02

Compressor with thermally-responsive modulation system

 #92
20160363121
2016-12-15

Scroll compressor

 #93
20160319815
2016-11-03

Compressor comprising a variable volume index valve

 #94
20160201678
2016-07-14

Scroll compressor

 #95
20160169228
2016-06-16

Scroll compressor having capacity varying valves

 #96
20160169227
2016-06-16

Compressor

 #97
20160160860
2016-06-09

Capacity modulated scroll compressor

 #98
20160102667
2016-04-14

Scroll compressor having a fixed scroll pressed in an axial direction against an orbiting scroll

 #99
20160102665
2016-04-14

Scroll compressor

 #100
20160090986
2016-03-31

Scroll compressor

 #101
20160084250
2016-03-24

Scroll compressor in which a fixed scroll and an orbiting scroll are placed between a partition plate and a main bearing

 #102
20160040669
2016-02-11

Two-shaft rotary pump with escape holes

 #103
20160040667
2016-02-11

Scroll compressor having an area of bypass holes formed at a compression chamber with a larger volume reduction gradient larger than an area of bypass holes at the other compression chamber

 #104
20160032924
2016-02-04

Capacity modulated scroll compressor

 #105
20150369246
2015-12-24

Scroll compressor

 #106
20150330386
2015-11-19

Capacity-modulated scroll compressor

 #107
20150316058
2015-11-05

Scroll compressor

 #108
20150316057
2015-11-05

Scroll compressor

 #109
20150316055
2015-11-05

Scroll compressor having a back pressure chamber assembly disposed on a fixed scroll plate and an elastic member disposed between a floating plate and a discharge cover

 #110
20150233375
2015-08-20

Scroll compressor

 #111
20150037193
2015-02-05

Oil return passage structure for oil pump

 #112
20150004040
2015-01-01

Injection port and orbiting-side wrap for a scroll compressor

 #113
20150004039
2015-01-01

CAPACITY-MODULATED SCROLL COMPRESSOR

 #114
20140271306
2014-09-18

Scroll compressor with back pressure discharge

 #115
20140271304
2014-09-18

Scroll compressor with back pressure chamber

 #116
20140219846
2014-08-07

Capacity modulated scroll compressor

 #117
20140154123
2014-06-05

Scroll pump with overpressure exhaust

 #118
20140140876
2014-05-22

Compressor with service valve assembly

 #119
20140099225
2014-04-10

Multi-stage pump assembly having a pressure controlled valve for controlling recirculation of fluid from the pump stage outlet to the pump stage inlet

 #120
20140090413
2014-04-03

Refrigeration cycle device capable of efficiently varying capacity providing a first and a second compressing mechanism disposed in a hermetic container

 #121
20140064999
2014-03-06

Capacity modulated scroll compressor

 #122
20140037486
2014-02-06

Compressor having capacity modulation or fluid injection systems

 #123
20140023541
2014-01-23

Injection molded seals for compressors

 #124
20130343942
2013-12-26

Rotary compressor

 #125
20130315768
2013-11-28

Scroll refrigeration compressor with improved retaining means and bypass valves

 #126
20130309118
2013-11-21

Scroll refrigeration compressor with confluent bypass passage and flow passage

 #127
20130302198
2013-11-14

Scroll refrigeration compressor with anti-return device

 #128
20130302197
2013-11-14

Scroll refrigeration compressor including heat shield, bypass passage, and bypass valve

 #129
20130259728
2013-10-03

Scroll compressor with control valve for controlling cooling capacity based on speed and centrifugal force

 #130
20130224055
2013-08-29

Vacuum pump

 #131
20130216414
2013-08-22

Volume ratio control system and method

 #132
20130136638
2013-05-30

Gas inlet valve for a compressor, compressor comprising a gas inlet valve of this type and method for operating a compressor comprising a gas inlet valve of this type

 #133
20130108496
2013-05-02

Scroll compressor with bypass holes

 #134
20130089449
2013-04-11

Scroll compressor with bypass hole

 #135
20130089448
2013-04-11

Scroll refrigeration compressor with a delivery valve and a bypass valve

 #136
20130078128
2013-03-28

Compressor including biasing passage located relative to bypass porting

 #137
20130022486
2013-01-24

Scroll compressor having at least one bypass hole

 #138
20120255445
2012-10-11

Double vacuum pump apparatus, gas purification system provided with double vacuum pump apparatus, and exhaust gas vibration suppressing device in double vacuum pump apparatus

 #139
20120189479
2012-07-26

Spherical expansion compressor adapted to variable working conditions

 #140
20120183418
2012-07-19

Screw compressor having reverse rotation protection

 #141
20120107164
2012-05-03

Variable displacement scroll compressor having first and second compression chambers that communicate with each other

 #142
20120100028
2012-04-26

Screw compressor having slide valve with inclined end face

 #143
20120100024
2012-04-26

Scroll compressor with partial unloader for start-up

 #144
20120039737
2012-02-16

Screw-type vacuum pump having overpressure openings

 #145
20120031141
2012-02-09

Fluid Machine, and Refrigerant Circuit and Waste Heat Utilization Device Using the Fluid Machine

 #146
20120027632
2012-02-02

Compressor with a bypass port

 #147
20120009076
2012-01-12

Scroll compressor

 #148
20110318212
2011-12-29

Scroll-type refrigerator compressor

 #149
20110256011
2011-10-20

Slide for use in a screw compressor

 #150
20110206548
2011-08-25

Compressor including valve assembly

 #151
20110179822
2011-07-28

REFRIGERATING APPARATUS

 #152
20110138848
2011-06-16

Variable capacity type rotary compressor, cooling apparatus having the same, and method for driving the same

 #153
20110135509
2011-06-09

Scroll compressor capacity modulation with hybrid solenoid and fluid control

 #154
20110129374
2011-06-02

Vacuum pump in particular roots type pump

 #155
20110120165
2011-05-26

Air conditioner and compressor having power and saving modes of operation

 #156
20110070114
2011-03-24

Oil return valve for a scroll compressor

 #157
20110058972
2011-03-10

Scroll compressor capacity modulation with solenoid mounted outside a compressor shell

 #158
20110052437
2011-03-03

Scroll compressor having through holes with a set depth

 #159
20100303659
2010-12-02

Compressor having piston assembly

 #160
20100300659
2010-12-02

Compressor having capacity modulation or fluid injection systems

 #161
20100300415
2010-12-02

External spring supercharger bypass valve

 #162
20100260620
2010-10-14

Screw compressor with capacity control slide valve

 #163
20100229595
2010-09-16

Compressor and refrigerating apparatus

 #164
20100183453
2010-07-22

Scroll compressor with three-step capacity control

 #165
20100166571
2010-07-01

Device for regulating the operating pressure of an oil-injected compressor installation

 #166
20100158731
2010-06-24

Compressor having capacity modulation system

 #167
20100135836
2010-06-03

Scroll compressor having capacity modulation system

 #168
20100116254
2010-05-13

Roots type gear compressor with helical lobes having communication with discharge port

 #169
20100047103
2010-02-25

Integral slide valve relief valve

 #170
20100037642
2010-02-18

COMPRESSOR CAPACITY CONTROL OPERATION MECHANISM AND AIR CONDITIONER PROVIDED WITH SAME

 #171
20100034675
2010-02-11

Vacuum pump provided with a device for its deactivation

 #172
20100028182
2010-02-04

LINE FED PERMANENT MAGNET SYNCHRONOUS TYPE MOTOR FOR SCROLL COMPRESSOR WITH BYPASS PORTS

 #173
20090308471
2009-12-17

Startup bypass system for a screw compressor

 #174
20090297380
2009-12-03

Compressor having capacity modulation system

 #175
20090246040
2009-10-01

Multistage vacuum pump unit and an operation method thereof

 #176
20090208356
2009-08-20

Scroll compressor with valve for controlling fluid to flow from an outer wall to an inner wall of a fixed or a movable spiral wrap

 #177
20090208348
2009-08-20

Capacity varying device for scroll compressor

 #178
20090116975
2009-05-07

Screw compressor comprising a relief valve

 #179
20090110570
2009-04-30

Scroll compressor including a fixed scroll and a orbiting scroll

 #180
20090074593
2009-03-19

Apparatus for preventing vacuum of scroll compressor

 #181
20090035167
2009-02-05

STEPPED SCROLL COMPRESSOR WITH STAGED CAPACITY MODULATION

 #182
20080317610
2008-12-25

Capacity variable type rotary compressor and driving method thereof

 #183
20080314053
2008-12-25

Capacity Variable Type Rotary Compressor and Driving Method Thereof and Driving Method for Air Conditioner Having the Same

 #184
20080310987
2008-12-18

Rotary piston machine

 #185
20080307809
2008-12-18

Capacity variable type rotary compressor and driving method thereof

 #186
20080307808
2008-12-18

Capacity variable device for rotary compressor and driving method of air conditioner having the same

 #187
20080286087
2008-11-20

System and a Method for Capacity Control in a Screw Compressor

 #188
20080223057
2008-09-18

Refrigerant System with Pulse Width Modulated Components and Variable Speed Compressor

 #189
20080184723
2008-08-07

Multistage compressor

 #190
20080166252
2008-07-10

Compressor with discharge muffler attachment using a spacer

 #191
20080138227
2008-06-12

Scroll compressor with capacity modulation

 #192
20080120985
2008-05-29

ROTARY COMPRESSOR, CONTROL METHOD THEREOF, AND AIR CONDITIONER USING THE SAME

 #193
20080107555
2008-05-08

Scroll compressor with vapor injection and unloader port

 #194
20070269327
2007-11-22

Constant Pressure Type and Fully Enclosed Scroll Compressor for Vehicle

 #195
20070217938
2007-09-20

Scroll compressor with bypass apparatus

 #196
20070140872
2007-06-21

COMPRESSOR ASSEMBLY FOR AIR CONDITIONER SYSTEM

 #197
20070065325
2007-03-22

Scroll compressor with bypass holes communicating with an intake chamber

 #198
20070048162
2007-03-01

Multistage roots-type vacuum pump

 #199
20060140803
2006-06-29

Apparatus for preventing vacuum state in scroll compressor

 #200
20060127257
2006-06-15

Capacity-changing unit of orbiting vane compressor

 #201
20060127236
2006-06-15

Smart control valve for compressors

 #202
20060073051
2006-04-06

Capacity-changing unit of orbiting vane compressor

 #203
20060065012
2006-03-30

Compressor having a safety device being built in at least one of the screw plugs of the oil-separator

 #204
20060057009
2006-03-16

Scroll compressor having vacuum preventing structure

 #205
20050135940
2005-06-23

Overheating protection apparatus of scroll compressor

 #206
20050135939
2005-06-23

Scroll compressor having overheat preventing unit

 #207
20050118035
2005-06-02

Multistage dry vacuum pump

 #208
20050063849
2005-03-24

Variable capacity rotary compressor

 #209
20050058562
2005-03-17

Variable capacity rotary compressor

 #210
20050053507
2005-03-10

Scroll compressor

 #211
20050053506
2005-03-10

Variable capacity rotary compressor

 #212
20050042125
2005-02-24

Two-step self-modulating scroll compressor

 #213
20050019177
2005-01-27

Variable capacity scroll compressor

 #214
20050019176
2005-01-27

Variable capacity scroll compressor

 #215
18541828
2024-12-10

Compressor and valve assembly

 #216
18130119
2024-05-28

Electro-magnetic throttle valve with integrated blowdown conduit