ClassID:

143895

F04C2270/18 - CPC Classification

Classification description:

Control; Monitoring or safety arrangements Pressure

Sub-classes:
Recent Application in this class:
#1
20260132789
2026-05-14

SCROLL PUMP AND SCROLL PUMP INLET VALVE

#2
20260110299
2026-04-23

AIR COMPRESSOR HAVING VACUUM AND ASSOCIATED METHODS FOR LOADING AND EXTRACTING MATERIALS

#3
20260071624
2026-03-12

ELECTRIC COMPRESSOR

#4
20250314250
2025-10-09

METHODS FOR MEASURING FLUID FLOW OF FLUID SUPPLY ASSEMBLY

#5
20250172144
2025-05-29

COMPRESSOR UNIT AND METHOD FOR OPERATING A COMPRESSOR UNIT

#6
20240426297
2024-12-26

ELECTRIC COMPRESSOR WITH INTEGRATED SENSOR(S)

#7
20240401595
2024-12-05

METHOD FOR CONTROLLING A ROTARY SCREW COMPRESSOR

#8
20240254991
2024-08-01

COMPRESSOR AND METHOD FOR CONTROLLING THE SAME

#9
20240240635
2024-07-18

PUMP AND METHOD

#10
20240183315
2024-06-06

VARIABLE DISPLACEMENT PUMP WITH FLOW DELIVERY TO DIFFERENT SYSTEMS WITH DIFFERENT PRESSURE SCHEDULES

#11
20240141894
2024-05-02

Method of Handling Gear Pump, Control System, Coating Apparatus and Robot System

#12
20240077044
2024-03-07

METHODS AND SYSTEMS FOR MOTOR-DRIVEN METERING PUMP

#13
20240035472
2024-02-01

METHOD FOR STOPPING A VACUUM PUMP

#14
20230392600
2023-12-07

METHOD FOR OPERATING A SCROLL VACUUM PUMP

#15
20230383750
2023-11-30

VACUUM PUMP, SCROLL PUMP, AND MANUFACTURING METHOD FOR SUCH

#16
20230383741
2023-11-30

Method for determining a discharge pressure of a rolling piston compressor

#17
20230374987
2023-11-23

Method for Ascertaining Leaks of a Displacement Pump

#18
20230366400
2023-11-16

Gas compressor

#19
20230349378
2023-11-02

Fault rectification method for a progressive cavity pump of a conveyor device for conveying viscous building materials

#20
20230340957
2023-10-26

AIR COMPRESSOR HAVING VACUUM AND ASSOCIATED METHODS FOR LOADING AND EXTRACTING MATERIALS

#21
20230332601
2023-10-19

Control of operating liquid flow into a liquid ring pump

#22
20230323877
2023-10-12

METHODS FOR MEASURING FLUID FLOW OF FLUID SUPPLY ASSEMBLY

#23
20230279857
2023-09-07

Method for controlling a rotary screw compressor

#24
20230265846
2023-08-24

STATE DETECTION ON ECCENTRIC SCREW PUMPS

#25
20230096279
2023-03-30

VACUUM SYSTEM HAVING CONDENSER AND ROOT VACUUM PUMP SET

#26
20220307497
2022-09-29

Variable displacement lubricant pump having a radial inlet or outlet opening axially between at least two bushing rings

#27
20220260075
2022-08-18

Compressor, monitoring system, and method of monitoring compressor

#28
20220178368
2022-06-09

PROGRESSIVE CAVITY PUMP SYSTEM HAVING REVERSE MODE

#29
20220082100
2022-03-17

Method for controlling a rotary screw compressor

#30
20210372405
2021-12-02

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

#31
20210372404
2021-12-02

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

#32
20210355941
2021-11-18

Dual drive vane pump

#33
20210293239
2021-09-23

Compressor and monitoring system

#34
20210102536
2021-04-08

Vacuum pump, scroll pump, and manufacturing method for such

#35
20210010474
2021-01-14

Liquid ring pump control

#36
20200400142
2020-12-24

Automotive variable mechanical lubricant pump

#37
20200040895
2020-02-06

MULTISTAGE POWER SAVING VACUUM DEVICE WITH ROOT VACUUM PUMP IN FIRST STAGE

#38
20200040889
2020-02-06

Pump ripple pressure monitoring for incompressible fluid systems

#39
20200003210
2020-01-02

OIL PUMP

#40
20200003209
2020-01-02

OIL PUMP

#41
20190301465
2019-10-03

Compressor system and system for maintaining a desired oil level

#42
20190271315
2019-09-05

Method for operating a rolling piston compressor

#43
20190271309
2019-09-05

ELECTRIC PUMP

#44
20190242629
2019-08-08

METHOD OF CONTROLLING ELECTRIC COMPRESSOR

#45
20190120227
2019-04-25

Two-stage variable-displacement oil pump

#46
20190072093
2019-03-07

Compression device

#47
20190032655
2019-01-31

Compressor unit and method for operating a compressor unit

#48
20180291902
2018-10-11

Method for controlling a rotary screw compressor

#49
20180283380
2018-10-04

Method and device for controlling the oil temperature of an oil-injected compressor installation or vacuum pump using a flow distributor

#50
20180283379
2018-10-04

Method for regulating the rotational speed of a compressor as a function of the available gas flow of a source and regulation thereby applied

#51
20180135626
2018-05-17

POSITIVE DISPLACEMENT PUMP ASSEMBLY FOR POWERTRAIN SYSTEMS AND HYDRAULIC CONTROL SYSTEM INCORPORATING THE SAME

#52
20180051695
2018-02-22

Pump for an engine

#53
20170266769
2017-09-21

Compressor diagnostic and protection system and method

#54
20170114682
2017-04-27

Relief device of oil circuit of engine

#55
20170058893
2017-03-02

Variable displacement pump

#56
20170030351
2017-02-02

Variable vane displacement pump utilizing a control valve and a switching valve

#57
20160370038
2016-12-22

Electric compressor and method for controlling same

#58
20160281710
2016-09-29

Operation control device for limiting the amount a positive displacement pump over or undershoots a target operating parameter value, pump system and method for operating such

#59
20160230620
2016-08-11

Method for operating a gear pump, and gear pump

#60
20150367463
2015-12-24

Compressor diagnostic and protection system and method

#61
20150204332
2015-07-23

Pumping unit and method for controlling such a pumping unit

#62
20150125312
2015-05-07

Method of operating a pumping system

#63
20140284041
2014-09-25

Coolant supply device and supply method

#64
20140260343
2014-09-18

Variable frequency drive apparatuses, systems, and methods and controls for same

#65
20140186193
2014-07-03

Air compressor

#66
20140147322
2014-05-29

Variable vane displacement pump utilizing a control valve and a switching valve

#67
20130294933
2013-11-07

Compressor diagnostic and protection system and method

#68
20130259707
2013-10-03

System and method for monitoring and control of cavitation in positive displacement pumps

#69
20130183167
2013-07-18

Operation control device for limiting the amount a positive displacement pump over-or undershoots a target operating parameter value, pump system and method for operating such

#70
20130039790
2013-02-14

Variable displacement lubricant pump

#71
20120303311
2012-11-29

Method for calculating the probability of moisture build-up in a compressor

#72
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

#73
20120251342
2012-10-04

Control system and method for pump output pressure control

#74
20120207626
2012-08-16

Thermally efficient multiple stage gear pump

#75
20120177514
2012-07-12

DISCHARGE PRESSURE ESTIMATION FOR COMPRESSOR

#76
20120148423
2012-06-14

Lubricant pump system

#77
20120048230
2012-03-01

Rotary vane engines with movable rotors, and engine systems comprising same

#78
20120047999
2012-03-01

Vane pump apparatus and leak check system having the same

#79
20120003107
2012-01-05

Pumps and pump heads comprising volume-compensation feature

#80
20110311373
2011-12-22

Rotary pump for a vehicle

#81
20110144944
2011-06-16

Compressor diagnostic and protection system and method

#82
20110129359
2011-06-02

VARIABLE OUTPUT PUMP

#83
20100178175
2010-07-15

Start-up control device and method for electric scroll compressor

#84
20100139611
2010-06-10

Hydraulic pump with variable flow and pressure and improved open-loop electric control

#85
20100047080
2010-02-25

Method of operating a pumping system

#86
20100043409
2010-02-25

Method and system for controlling the operation of a pump

#87
20100028171
2010-02-04

Control system and method for pump output pressure control

#88
20090304522
2009-12-10

Installation for high pressure compression with several stages

#89
20090246062
2009-10-01

Slide valve actuation for overpressure safety

#90
20090175749
2009-07-09

Fluid displacement apparatus having pressure sensing device

#91
20090169364
2009-07-02

Progressive cavity apparatus with transducer and methods of forming and use

#92
20090060728
2009-03-05

Pumps and pump-heads comprising internal pressure-absorbing member

#93
20090041605
2009-02-12

Adjusting valve for adjusting the delivery volume of a displacement pump

#94
20080307819
2008-12-18

REFRIGERATION MONITORING SYSTEM AND METHOD

#95
20080279699
2008-11-13

Controller for a variable displacement feed pump

#96
20080273989
2008-11-06

MULTI-STAGE GAS COMPRESSING APPARATUS

#97
20080240953
2008-10-02

ROTARY COMPRESSOR UNIT AND METHOD OF CONTROLLING OPERATION THEREOF

#98
20080038127
2008-02-14

SCREW COMPRESSOR

#99
20080038117
2008-02-14

Pumping System Employing a Variable-Displacement Vane Pump

#100
20070269327
2007-11-22

Constant Pressure Type and Fully Enclosed Scroll Compressor for Vehicle

#101
20070212243
2007-09-13

Variable displacement vane pump and method of controlling the same

#102
20070140866
2007-06-21

Oil-injection screw compressor

#103
20060222527
2006-10-05

Electric pump and fluid supply apparatus

#104
20060216159
2006-09-28

Multiple compressor control system

#105
20060193728
2006-08-31

System and method for controlling a variable speed compressor during stopping

#106
20060171818
2006-08-03

Oil pump

#107
20060127229
2006-06-15

Variable displacement pump and control therefor

#108
20060104823
2006-05-18

Hydraulic pump with variable flow and variable pressure and electric control

#109
20060065012
2006-03-30

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

#110
20050254982
2005-11-17

Internal gear machine with variable capacity

#111
20050249622
2005-11-10

Device for controlling parasitic losses in a fluid pump

#112
20050235664
2005-10-27

Compressor diagnostic and protection system and method

#113
20050235663
2005-10-27

Compressor diagnostic and protection system and method

#114
20050235662
2005-10-27

Compressor configuration system and method

#115
20050235661
2005-10-27

Compressor diagnostic and protection system and method

#116
20050235660
2005-10-27

Compressor diagnostic and protection system

#117
20050129528
2005-06-16

Variable displacement vane pump with variable target regulator

#118
20050128869
2005-06-16

Apparatus and method for injecting a liquid dye into a polymer melt

#119
20050126194
2005-06-16

Refrigerant cycle apparatus

#120
20050118033
2005-06-02

Method for adjusting a volumetric flow-variable positive displacement pump in an internal combustion engine