ClassID:

143662

F04C28/02 - CPC Classification

Classification description:

Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids specially adapted for several pumps connected in series or in parallel

Recent Application in this class:
#1
20260022702
2026-01-22

HYBRID COMPRESSOR

#2
20240418169
2024-12-19

TWO-STAGE REFRIGERANT COMPRESSOR AND OPERATION METHOD THEREOF

#3
20240401595
2024-12-05

METHOD FOR CONTROLLING A ROTARY SCREW COMPRESSOR

#4
20240175396
2024-05-30

Dual-Fuel Power System and Air Supply and Purging Method Thereof

#5
20240068466
2024-02-29

PROGRAM UPDATE METHOD FOR THE GAS COMPRESSOR SYSTEM

#6
20230340962
2023-10-26

Optimization systems and methods for operating air compressor groups

#7
20230279857
2023-09-07

Method for controlling a rotary screw compressor

#8
20230123229
2023-04-20

System and method for a simplified high pressure monobore multiport pod missile

#9
20230107879
2023-04-06

METHOD TO OPERATE A VACUUM SYSTEM

#10
20230096279
2023-03-30

VACUUM SYSTEM HAVING CONDENSER AND ROOT VACUUM PUMP SET

#11
20230033429
2023-02-02

Vacuum pump system and method for operating a vacuum pump system

#12
20230003208
2023-01-05

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

#13
20220333599
2022-10-20

MEASURED VALUE STANDARDIZATION

#14
20220090592
2022-03-24

Vacuum pumping

#15
20220082100
2022-03-17

Method for controlling a rotary screw compressor

#16
20220049693
2022-02-17

Method for Controlling a Compressor Installation

#17
20210404469
2021-12-30

Method for operating a vacuum pump system and vacuum pump system applying such method

#18
20210388931
2021-12-16

System and method for a simplified high pressure monobore multiport pod missile

#19
20210372405
2021-12-02

Vacuum pumping system having a plurality of positive displacement vacuum pumps and method for operating the same

#20
20210372404
2021-12-02

Power saving vacuuming pump system based on complete-bearing-sealing and dry-large-pressure-difference root vacuuming root pumps

#21
20210340977
2021-11-04

Variable capacity compressor operation mode determination method and device, variable capacity compressor, and air conditioner

#22
20210324858
2021-10-21

Oil-injected multistage compressor device and method for controlling a compressor device

#23
20210281208
2021-09-09

Variable speed drive with secondary windings

#24
20210270260
2021-09-02

Compressor cylinder switching control method and device, unit and air conditioning system

#25
20210123450
2021-04-29

Electric compressor system for vehicle

#26
20210054841
2021-02-25

Multi-stage dry roots vacuum pump

#27
20210025380
2021-01-28

Gas compressor and method for controlling same

#28
20210003137
2021-01-07

Method for analyzing, monitoring, optimizing and/or comparing energy efficiency in a multiple compressor system

#29
20200318640
2020-10-08

Method of pumping in a system of vacuum pumps and system of vacuum pumps

#30
20200200181
2020-06-25

Oil control for climate-control system

#31
20200200160
2020-06-25

Oil control for climate-control system

#32
20200124049
2020-04-23

VACUUM PUMP STRUCTURE

#33
20200088623
2020-03-19

System and method for providing stable fluid flow

#34
20190345938
2019-11-14

Vacuum pump system and method for operating a vacuum pump system

#35
20190285070
2019-09-19

Oil equalization configuration for multiple compressor systems containing three or more compressors

#36
20190249525
2019-08-15

OPERATION OF A WELLHEAD COMPRESSOR

#37
20190055945
2019-02-21

Method for operating a vacuum pump system and vacuum pump system applying such method

#38
20190048899
2019-02-14

Hydraulic device that controls pulsation in first oil by increasing rotation number of second pump

#39
20190024662
2019-01-24

Compressor and refrigeration system having same

#40
20180291902
2018-10-11

Method for controlling a rotary screw compressor

#41
20180149156
2018-05-31

Modularized integrated non-coaxial multiple chamber dry vacuum pump

#42
20180135632
2018-05-17

Refrigerant path holes in a rotary compressor

#43
20180112666
2018-04-26

VACUUM PUMP SYSTEM

#44
20180085799
2018-03-29

Exhaust system, semiconductor manufacturing equipment, and method for operating the exhaust system

#45
20180003423
2018-01-04

Scroll compressors with different volume indexes and systems and methods for same

#46
20170284394
2017-10-05

Pumping system for generating a vacuum and method for pumping by means of this pumping system

#47
20170254330
2017-09-07

Volumetric compressor

#48
20170241690
2017-08-24

Compressor Capacity Modulation System For Multiple Compressors

#49
20170198428
2017-07-13

Heat pump dryer with dual-exhaust compressor system and control method thereof

#50
20170191922
2017-07-06

System and method for providing stable fluid flow

#51
20170159652
2017-06-08

Method for controlling a compressor installation

#52
20170122321
2017-05-04

Method of pumping in a system of vacuum pumps and system of vacuum pumps

#53
20170122319
2017-05-04

Vacuum pump system

#54
20170074265
2017-03-16

Scroll fluid machine having tip seal member separated into different portions

#55
20170045052
2017-02-16

Multiple compressor configuration with oil-balancing system

#56
20170037611
2017-02-09

Vacuum sewage system with monitoring system and method of use

#57
20160356273
2016-12-08

Vacuum pump system with light gas pumping and leak detection apparatus comprising the same

#58
20160258656
2016-09-08

System including high-side and low-side compressors

#59
20160252091
2016-09-01

Measured value standardization

#60
20160233073
2016-08-11

Automated cleanliness diagnostic for mass spectrometer

#61
20160084546
2016-03-24

Heat pump apparatus

#62
20160040669
2016-02-11

Two-shaft rotary pump with escape holes

#63
20150369243
2015-12-24

Spiral compressor

#64
20150354572
2015-12-10

Hermetic compressor and vapor compression-type refrigeration cycle device including the hermetic compressor

#65
20150211518
2015-07-30

Compressor system and method of controlling the same

#66
20150204332
2015-07-23

Pumping unit and method for controlling such a pumping unit

#67
20150170938
2015-06-18

Method and device for pumping of a process chamber

#68
20150167660
2015-06-18

Fluid valve

#69
20150167598
2015-06-18

Rotational pump and fuel vapor leakage detection device having the same

#70
20150152871
2015-06-04

Method and pump arrangement for evacuating a chamber

#71
20150114476
2015-04-30

Method and Apparatus for Adjusting Operating Parameters of a Vacuum Pump Arrangement

#72
20150078928
2015-03-19

Compressor, air conditioner system comprising the compressor and heat pump water heater system

#73
20140241909
2014-08-28

System including high-side and low-side compressors

#74
20140238066
2014-08-28

System including high-side and low-side compressors

#75
20140056725
2014-02-27

Suction header arrangement for oil management in multiple-compressor systems

#76
20140037484
2014-02-06

Oil equalization configuration for multiple compressor systems containing three or more compressors

#77
20140037483
2014-02-06

Method of active oil management for multiple scroll compressors

#78
20130340842
2013-12-26

Vacuum pumping system

#79
20130330210
2013-12-12

Compression device, and thermodynamic system comprising such a compression device

#80
20130287592
2013-10-31

Compressed gas supply unit

#81
20130236345
2013-09-12

COMPRESSOR UNIT INCLUDING GEAR ROTOR AND COMPRESSOR SYSTEM USING THE SAME

#82
20130213084
2013-08-22

Two-stage compression refrigeration cycle device

#83
20130164147
2013-06-27

Vacuum pumping

#84
20130136622
2013-05-30

Compression device and a thermodynamic system comprising such a compression device

#85
20130028757
2013-01-31

Vacuum pumping system

#86
20130014537
2013-01-17

Refrigerator

#87
20120257961
2012-10-11

Multistage vacuum pump

#88
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

#89
20120251368
2012-10-04

Pump

#90
20120189478
2012-07-26

VACUUM PUMP SYSTEM

#91
20120121442
2012-05-17

Multistage dry vacuum pump

#92
20120029706
2012-02-02

Simulation-Supported Method for Controlling and Regulating Compressed Air Stations

#93
20120014816
2012-01-19

Compressor

#94
20110286860
2011-11-24

Method for Controlling a Compressor Installation

#95
20110271699
2011-11-10

FREQUENCY VARIABLE COMPRESSOR AND CONTROL METHOD THEREOF

#96
20110256003
2011-10-20

DRY VACUUM PUMP

#97
20110179822
2011-07-28

REFRIGERATING APPARATUS

#98
20110150683
2011-06-23

Rotary compressor

#99
20110138831
2011-06-16

REFRIGERATION CYCLE APPARATUS

#100
20110020148
2011-01-27

Multi-stage rotary compressor

#101
20100303658
2010-12-02

Water-Cooled Oil-Free Air Compressor

#102
20100266433
2010-10-21

Multi-stage dry pump

#103
20100202909
2010-08-12

Fluid machine and refrigeration cycle apparatus

#104
20100186433
2010-07-29

Scroll Compressors with Different Volume Indexes and Systems and Methods for Same

#105
20100178174
2010-07-15

Compressor system

#106
20100051126
2010-03-04

Tandem compressors with common intermediate port

#107
20100018465
2010-01-28

Method in a milking system for creating a required vacuum level and computer program products

#108
20090320929
2009-12-31

Method for controlling a compressed air installation and controller and compressed air installation for employing such a method

#109
20090304522
2009-12-10

Installation for high pressure compression with several stages

#110
20090246036
2009-10-01

Method for controlling a compressed air unit and a controller and compressed air unit for applying such a method

#111
20090242046
2009-10-01

Valve module

#112
20080273989
2008-11-06

MULTI-STAGE GAS COMPRESSING APPARATUS

#113
20080240953
2008-10-02

ROTARY COMPRESSOR UNIT AND METHOD OF CONTROLLING OPERATION THEREOF

#114
20080226482
2008-09-18

Compressor with controlled capacity

#115
20080213116
2008-09-04

Multi-Stage Rotary Compressor

#116
20080175717
2008-07-24

System and method of operation of multiple screw compressors with continuously variable speed to provide noise cancellation

#117
20080087033
2008-04-17

Air conditioner and driving method thereof

#118
20080080984
2008-04-03

EVACUATION APPARATUS

#119
20080080982
2008-04-03

EVACUATION APPARATUS

#120
20080063534
2008-03-13

OPERATION CONTROL DEVICE AND METHOD OF VACUUM PUMPS

#121
20070022771
2007-02-01

Cooling system with variable capacity control

#122
20070020111
2007-01-25

Fast enclosure pumping with power saving

#123
20060288715
2006-12-28

Compressor with capacity control

#124
20060257265
2006-11-16

Method for controlling a compressed air installation comprising several compressors, control box applied thereby and compressed air installation applying this method

#125
20060222511
2006-10-05

Multicylindrical rotary compressor

#126
20060222506
2006-10-05

Rapidly pumping out an enclosure while limiting energy consumption

#127
20060216159
2006-09-28

Multiple compressor control system

#128
20060193732
2006-08-31

Variable capacity compressor and starting method thereof

#129
20060127257
2006-06-15

Capacity-changing unit of orbiting vane compressor

#130
20050123407
2005-06-09

System and method for noise attenuation of screw compressors

#131
18113799
2023-12-05

System and method of controlling single or dual pump operation