ClassID:

143345

F04B2205/04 - CPC Classification

Classification description:

Fluid parameters Pressure in the outlet chamber

Recent Application in this class:
#1
20260117763
2026-04-30

Intuitive Natural Gas Compressor Monitoring System

#2
20260085678
2026-03-26

AUTOMATED VALVE ACTUATION FOR FRAC FLUID ENDS USING POSITION AND/OR PRESSURE SENSORS

#3
20260063120
2026-03-05

OPERATING STRATEGY FOR LIMITING THE POWER CONSUMPTION OF A BRUSHLESS MOTOR FOR ELECTRICALLY DRIVEN PASSENGER-CAR AIR-SPRING COMPRESSORS THROUGH MODE SWITCHING

#4
20250334111
2025-10-30

ELECTRIC DRIVE FRACTURING DEVICE AND BRAKING METHOD THEREFOR

#5
20250283460
2025-09-11

AUTOMATED VALVE ACTUATION FOR FRAC FLUID ENDS USING POSITION AND/OR PRESSURE SENSORS

#6
20250237206
2025-07-24

AIR COMPRESSOR STRUCTURE

#7
20250180028
2025-06-05

METHOD OF CONTROLLING A PUMP AND MOTOR

#8
20240352946
2024-10-24

LOW-FLOW FLUID DELIVERY SYSTEM AND LOW-FLOW DEVICE THEREFOR

#9
20240141886
2024-05-02

VALVE CONDITION MONITORING SYSTEM

#10
20240084791
2024-03-14

Air pump with automatic air pumping function

#11
20230243351
2023-08-03

Controlling a discharge pressure from a pump

#12
20230193704
2023-06-22

Test apparatus for measuring particle plugging of a simulated fracture

#13
20230160381
2023-05-25

LOADING A FLUIDIC ELEMENT

#14
20230068188
2023-03-02

Method of controlling a pump and motor

#15
20230044928
2023-02-09

HYDRAULIC FRACTURING PUMP HEALTH AND PERFORMANCE MONITORING USING IOT SENSOR NETWORKS

#16
20220299023
2022-09-22

Intuitive Natural Gas Compressor Monitoring System

#17
20220056902
2022-02-24

DEVICE AND METHOD FOR MONITORING OIL PRESSURE AND GAS PRESSURE OF DIAPHRAGM COMPRESSOR

#18
20220036872
2022-02-03

Audio control to mask vehicle component noise

#19
20210396234
2021-12-23

Motor drive system and method

#20
20210301805
2021-09-30

Cryopump system, and control device and regeneration method for cryopump system

#21
20210291795
2021-09-23

INFLATOR WITH DYNAMIC PRESSURE COMPENSATION

#22
20210246890
2021-08-12

Linear compressor

#23
20210206354
2021-07-08

Inflator with dynamic pressure compensation

#24
20210206353
2021-07-08

INFLATOR WITH DYNAMIC PRESSURE COMPENSATION

#25
20210190623
2021-06-24

Display structure of pressure gauge of air compressor

#26
20210115910
2021-04-22

Torque control system for a variable displacement pump

#27
20210107038
2021-04-15

Pressurized cleaning apparatus comprising a pressure generation unit

#28
20210094311
2021-04-01

HIGH-VISCOSITY FLUID DELIVERY

#29
20210028738
2021-01-28

Method for controlling motor-driven pump in a fluid system

#30
20200370988
2020-11-26

Determining operational health of a pump

#31
20200362850
2020-11-19

PISTON COMPRESSOR FOR MEDICAL USE

#32
20200332781
2020-10-22

Hydraulic pressure amplifier

#33
20200116138
2020-04-16

Linear compressor

#34
20200109610
2020-04-09

Control, timing, positioning, and modulation of pistons in high-pressure fluid ends

#35
20200088189
2020-03-19

Method of controlling a pump and motor

#36
20200063758
2020-02-27

Low-flow fluid delivery system and low-flow device therefor

#37
20200062052
2020-02-27

Wheel-mounted air compression apparatus

#38
20200040888
2020-02-06

Rig management system for transmission control of a hydraulic fracturing rig

#39
20200025187
2020-01-23

Linear compressor

#40
20190376862
2019-12-12

Compression device

#41
20190264671
2019-08-29

Pump for liquid chromatography with pressure sensor

#42
20190263363
2019-08-29

Inflator with dynamic pressure compensation

#43
20190249660
2019-08-15

Method for controlling the outlet temperature of an oil injected compressor or vacuum pump and oil injected compressor or vacuum pump implementing such method

#44
20190154029
2019-05-23

METHODS AND SYSTEMS FOR AIR COMPRESSOR WITH ELECTRIC INLET VALVE CONTROL

#45
20190143010
2019-05-16

Methods and systems of fluid management in surgical procedures

#46
20190010940
2019-01-10

Method of pump operation, use of the method in HPLC, pump, pump system, and HPLC system

#47
20180347558
2018-12-06

Intake pressure control system

#48
20180328355
2018-11-15

Intake Pressure Control System

#49
20180187669
2018-07-05

Miniature fluid control device

#50
20180128266
2018-05-10

Continuous sample delivery peristaltic pump

#51
20180100496
2018-04-12

System for detecting failure location in a pump

#52
20180045185
2018-02-15

Torque control system for a variable displacement pump

#53
20180010599
2018-01-11

Calibration of a pump

#54
20170314282
2017-11-02

Fluid circulation monitoring system

#55
20170298926
2017-10-19

Compressor

#56
20170250638
2017-08-31

Pneumatic energy harvesting and monitoring

#57
20170234117
2017-08-17

Method of controlling a pump and motor

#58
20170130707
2017-05-11

Positive-displacement piston pump and associated delivery control method

#59
20170107702
2017-04-20

Pressure boosting device

#60
20170086619
2017-03-30

Machine for preparing liquid products, in particular via capsules

#61
20170051735
2017-02-23

Continuous sample delivery peristaltic pump

#62
20170016433
2017-01-19

Reducing fluid pressure spikes in a pumping system

#63
20160356270
2016-12-08

Monitoring system for fluid pump

#64
20160281696
2016-09-29

Portable Self-Powered Hydraulic Pump Apparatus

#65
20150316049
2015-11-05

Pneumatic Energy Harvesting and Monitoring

#66
20150238677
2015-08-27

Pressure detection device of liquid flow route

#67
20150078920
2015-03-19

Air compressor

#68
20130216357
2013-08-22

Feed water pump control device

#69
20130151216
2013-06-13

Method and system for optimizing downhole fluid production

#70
20130004340
2013-01-03

System and method for monitoring operation of a pump

#71
20120134849
2012-05-31

Character parameters obtaining method for displacement control mechanism of hydraulic pump and detecting device for carrying out the method

#72
20120076666
2012-03-29

Method, device and means for driving a reciprocating linear motion double acting pump

#73
20110139273
2011-06-16

Exhaust check valve of swash plate compressor

#74
20110098864
2011-04-28

System and method for monitoring operation of a pump

#75
20110071774
2011-03-24

Pneumatic energy harvesting and monitoring

#76
20100310382
2010-12-09

Method of controlling a pump and motor

#77
20090163854
2009-06-25

Network communication and message protocol for a medical perfusion system

#78
20080240930
2008-10-02

Method and System for Optimizing Downhole Fluid Production

#79
20080237510
2008-10-02

Valve device for air compressor

#80
20080181790
2008-07-31

Pump and pump control circuit apparatus and method

#81
20080181788
2008-07-31

Pump and pump control circuit apparatus and method

#82
20080181786
2008-07-31

Pump and pump control circuit apparatus and method

#83
20080152508
2008-06-26

Pump and pump control circuit apparatus and method

#84
20070264131
2007-11-15

Variable displacement compressor

#85
20070177985
2007-08-02

Integral sensor and control for dry run and flow fault protection of a pump

#86
20070128047
2007-06-07

System and method for monitoring operation of a pump

#87
20070128046
2007-06-07

System and method for control of fluid pressure

#88
20070077157
2007-04-05

Air compressor having improved valve device

#89
20060290464
2006-12-28

Network communication and message protocol for a medical perfusion system

#90
20060204367
2006-09-14

Pump and pump control circuit apparatus and method

#91
20060177317
2006-08-10

Direct connection manifold for reciprocating piston pump

#92
20050186084
2005-08-25

Tire pump with high-pressure audio warning

#93
20050147508
2005-07-07

Methods and apparatus for determining the presence or absence of a fluid leak

#94
20050095145
2005-05-05

Liquid chromatograph pump with dual cylinders and dual plungers

#95
20050053475
2005-03-10

Pneumatically operated compressor capacity control valve with discharge pressure sensor

#96
20050025632
2005-02-03

Integrated control valve for a variable capacity compressor

#97
20050016587
2005-01-27

Combination fitting

#98
16735799
2021-11-16

Hand-operated air pump

#99
15433734
2018-07-10

Intake pressure control system