ClassID:

143123

F04B49/022 - CPC Classification

Classification description:

Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups  - ; Stopping, starting, unloading or idling control by means of pressure

Recent Application in this class:
#1
20260016002
2026-01-15

EMISSIONS COLLECTION SYSTEM

#2
20250369435
2025-12-04

BOOSTER PUMP CONTROL SYSTEM

#3
20250129776
2025-04-24

CORDLESS COMPRESSOR

#4
20250054715
2025-02-13

MULTI-MODE AIR COMPRESSOR PRESSURE POWER SWITCH

#5
20250035104
2025-01-30

SYSTEMS AND METHODS FOR CONTROLLING VEHICLE AIR COMPRESSOR

#6
20240384636
2024-11-21

SYSTEMS AND METHODS TO AUTONOMOUSLY OPERATE HYDRAULIC FRACTURING UNITS

#7
20240297003
2024-09-05

PRESSURE SWITCH AND HERMETIC ELECTRIC COMPRESSOR

#8
20240240629
2024-07-18

DYNAMIC COMPRESSOR CONTROLS

#9
20240084791
2024-03-14

Air pump with automatic air pumping function

#10
20240062974
2024-02-22

Multi-mode air compressor pressure power switch

#11
20240052824
2024-02-15

Cordless compressor

#12
20240010179
2024-01-11

Air Dryer Apparatus for a Vehicle Air Brake Charging System

#13
20230417235
2023-12-28

Intelligent controller for a reciprocating air compressor and methods of use thereof

#14
20230358225
2023-11-09

PORTABLE TIRE INFLATOR

#15
20230322040
2023-10-12

PNEUMATIC GAUGE AND PRESSURE CONTROL DEVICE AND PNEUMATIC SYSTEM INCLUDING SAME

#16
20230313654
2023-10-05

Systems and methods to autonomously operate hydraulic fracturing units

#17
20230287776
2023-09-14

Controlling fluid pressures at multiple well heads for continuous pumping

#18
20230228179
2023-07-20

Systems and methods to autonomously operate hydraulic fracturing units

#19
20230213029
2023-07-06

Integrated pump guard and control interlock

#20
20230175388
2023-06-08

PREDICTION BASED PUMP-OFF DETECTION

#21
20230160381
2023-05-25

LOADING A FLUIDIC ELEMENT

#22
20230128365
2023-04-27

Systems and methods to autonomously operate hydraulic fracturing units

#23
20230003111
2023-01-05

Systems and methods to autonomously operate hydraulic fracturing units

#24
20220333593
2022-10-20

Cordless compressor

#25
20220252065
2022-08-11

Fluid Machine Device

#26
20220243717
2022-08-04

Integrated pump guard and control interlock

#27
20220099085
2022-03-31

PUMP PERFORMANCE DATA LOGGING APPARATUS

#28
20220090557
2022-03-24

Method for managing a piston pump for a heat engine

#29
20220056901
2022-02-24

Fault detection and prediction

#30
20220036872
2022-02-03

Audio control to mask vehicle component noise

#31
20210396116
2021-12-23

Systems and methods to autonomously operate hydraulic fracturing units

#32
20210381503
2021-12-09

Hydraulic machine with controllable valves and method for idling such a hydraulic machine

#33
20210317826
2021-10-14

Selective fluid pumping system

#34
20210316577
2021-10-14

Dual air compressor for hybrid vehicles

#35
20210293231
2021-09-23

Air compressor

#36
20210283961
2021-09-16

AUTOMATIC ELECTRONIC AIR PUMP

#37
20210199100
2021-07-01

Air compressor

#38
20210180587
2021-06-17

Governor device for controlling a compressor

#39
20210172436
2021-06-10

Compressor or pump equipped with a control for the regulation of the working range and working method applied for the regulation

#40
20210126566
2021-04-29

Low-speed high torque motor control and foam system

#41
20210108632
2021-04-15

Air pressure system

#42
20210079904
2021-03-18

COMPRESSED AIR SYSTEM FOR A MOTOR VEHICLE

#43
20210071660
2021-03-11

Air compressor

#44
20210054845
2021-02-25

Multi-stage compressor and method of controlling the same

#45
20210053710
2021-02-25

SEPARABLE EVACUATION DEVICE

#46
20210017978
2021-01-21

Dynamic compressor controls

#47
20200400137
2020-12-24

Agricultural work vehicle having air supply device

#48
20200378394
2020-12-03

Air compressor

#49
20200347839
2020-11-05

Drum mounted, on-demand fluid transfer pump

#50
20200325890
2020-10-15

Air compressor

#51
20200284251
2020-09-10

Pressure safety shutoff

#52
20200240415
2020-07-30

Oil feed type air compressor

#53
20200240405
2020-07-30

System and method for evacuating a process space

#54
20200217313
2020-07-09

Integrated pump guard and control interlock

#55
20200211800
2020-07-02

Multi-mode air compressor pressure power switch

#56
20200191138
2020-06-18

Hydrostatic system providing volumetric efficiency when pump is neutral

#57
20200191137
2020-06-18

ELECTRONIC TORQUE AND PRESSURE CONTROL FOR LOAD SENSING PUMPS

#58
20200173434
2020-06-04

Air compressor

#59
20200136368
2020-04-30

Overload protection device and method, storage medium, compressor and electric appliance

#60
20200132083
2020-04-30

Air pump control system and method

#61
20200132063
2020-04-30

PUMP UNIT

#62
20200116145
2020-04-16

System and method for removing residual pressure in motor driven air compressor management system

#63
20200072212
2020-03-05

COMPRESSOR AND REFRIGERATION CYCLE DEVICE

#64
20200062052
2020-02-27

Wheel-mounted air compression apparatus

#65
20200033899
2020-01-30

Automatic system profiling for a well system

#66
20190346154
2019-11-14

Method and device for saving heat energy and water in a sanitary facility

#67
20190331103
2019-10-31

Gas leak determining method, and multi-stage compressor

#68
20190234396
2019-08-01

INFLATING DEVICE WITH A CONTROL DEVICE

#69
20190128253
2019-05-02

Systems and methods for running an air compressor using a permanent magnet generator

#70
20190105954
2019-04-11

Automatic electronic air pump

#71
20190085840
2019-03-21

Autonomous submersible pump

#72
20190055935
2019-02-21

Reciprocating compressor and control method therefor

#73
20190048867
2019-02-14

HYDRAULIC CONTROL DEVICE

#74
20180372087
2018-12-27

Piston Compressor Having a Venting Device

#75
20180372079
2018-12-27

Portable pump

#76
20180354485
2018-12-13

Fluid delivery system

#77
20180306188
2018-10-25

Compressor provided with an electronic pressure switch and method of regulating the pressure within such a compressor

#78
20180292679
2018-10-11

Glasses with wearing cushion device

#79
20180291887
2018-10-11

Eyeglass buffer protection device

#80
20180258924
2018-09-13

COMPENSATING DEVICE FOR VOLUMETRIC PUMPS

#81
20180238323
2018-08-23

Method for operating a device for the dosed supply of a liquid

#82
20180223832
2018-08-09

Air compressing apparatus and control method

#83
20180216612
2018-08-02

Portable air compressor

#84
20180199669
2018-07-19

SHOE AUTOMATIC INFLATABLE CUSHION SYSTEM

#85
20180058434
2018-03-01

Air compressor

#86
20180030979
2018-02-01

Apparatus, system, and method for introducing a liquid into a vessel

#87
20180011500
2018-01-11

Method for compensating leakage losses and conveyor system for conveying a defined volume of a liquid

#88
20180010595
2018-01-11

Lubricating oil supply device and lubricating oil supply control method for vehicle

#89
20170236664
2017-08-17

Multi-mode air compressor pressure power switch

#90
20170218965
2017-08-03

Load/unload control method for compressor system

#91
20170198688
2017-07-13

Integrated pump guard and control interlock

#92
20170147015
2017-05-25

Multi-stream compressor management system and method

#93
20170130728
2017-05-11

Air pump control system and method

#94
20170130707
2017-05-11

Positive-displacement piston pump and associated delivery control method

#95
20170122307
2017-05-04

Linear compressor and method for controlling a linear compressor

#96
20170122304
2017-05-04

LIQUID DISCHARGE APPARATUS

#97
20170097121
2017-04-06

COMPRESSED GAS STORAGE SYSTEM

#98
20170089331
2017-03-30

FLUID REMOVAL FROM A SUMP WITH ELECTRONIC CONTROL AND FLUID TYPE SEPARATION

#99
20170089328
2017-03-30

Fluid pressure producing method and fluid pressure producing device

#100
20170037842
2017-02-09

Air compressor

#101
20160365738
2016-12-15

Battery-powered pump for removing fluids from a subterranean well

#102
20160298620
2016-10-13

MINIATURE PUMPS, ACTUATORS AND RELATED DEVICES AND METHODS FOR MAKING AND USE

#103
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

#104
20160265530
2016-09-15

Air compressor system and method of operation

#105
20160201665
2016-07-14

Gas control device

#106
20160177937
2016-06-23

Method for Determining a Physical Variable in a Positive Displacement Pump

#107
20160176266
2016-06-23

Compressor comprising a pressure-relief groove

#108
20160144676
2016-05-26

Automatic electronic air pump

#109
20160123318
2016-05-05

Adaptive Pump Control For Positive Displacement Pump Failure Modes

#110
20160123124
2016-05-05

Dual horsehead block and tackle pumping unit

#111
20160090973
2016-03-31

Air compressor

#112
20160090153
2016-03-31

Snowmobile having electronically controlled lubrication

#113
20160045400
2016-02-18

Downstream flow detection system for flow control apparatus

#114
20150241883
2015-08-27

Multi-stream compressor management system and method

#115
20150176575
2015-06-25

Compressed air system for a motor vehicle

#116
20150068624
2015-03-12

Mud pump pressure switch

#117
20150030463
2015-01-29

Pumping system with two way communication

#118
20140311912
2014-10-23

Flow sensors with modular microfluidic channels and methods of manufacture

#119
20140294618
2014-10-02

Hydraulic pressure supply system of automatic transmission

#120
20140271253
2014-09-18

Fire Pump Controller Configured to Control Pressure Maintenance in Sprinkler Systems

#121
20130294934
2013-11-07

System and method for a compressor

#122
20130294929
2013-11-07

Method for controlling a refilling motor that drives a hydraulic pump

#123
20130266455
2013-10-10

Air compressor with shut-off mechanism

#124
20130259719
2013-10-03

Air compressor having mechanical govenor with engine speed relief

#125
20130259707
2013-10-03

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

#126
20130248269
2013-09-26

Snowmobile having electronically controlled lubrication

#127
20130202456
2013-08-08

Liquid metering pump, and device for detecting the variation in pressure for such a pump

#128
20130189118
2013-07-25

Torque allocating system for a variable displacement hydraulic system

#129
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

#130
20130171010
2013-07-04

Motor control unit and electric pump unit

#131
20130167951
2013-07-04

Hydraulic drive for a pressure booster

#132
20130098642
2013-04-25

System and method of automatic pump operation

#133
20130062541
2013-03-14

Device, method and system for compressed air control and compressed air supply

#134
20130045118
2013-02-21

Smart blow-down system for variable frequency drive compressor units

#135
20130022476
2013-01-24

Adaptive pump control for positive displacement pump failure modes

#136
20120270700
2012-10-25

Engine start control device

#137
20120230846
2012-09-13

Systems and methods of controlling pressure maintenance pumps and data logging pump operations

#138
20120197510
2012-08-02

Snowmobile having electronically controlled lubrication

#139
20120189463
2012-07-26

Hydraulic pump operating device and method for use in hydraulic system

#140
20120180503
2012-07-19

CRYOPUMP AND VACUUM VALVE DEVICE

#141
20120180456
2012-07-19

Exhaust gas treatment method and device for internal combustion engine

#142
20120107146
2012-05-03

Pumping device having a pressure adjustable function

#143
20120046674
2012-02-23

Power regulated implant

#144
20120039723
2012-02-16

CONTROLLER FOR A LIQUID SUPPLY PUMP

#145
20110286861
2011-11-24

Air compressor system and method of operation

#146
20110255995
2011-10-20

Air compressor system and method of operation

#147
20110255994
2011-10-20

Air compressor system and method of operation

#148
20110253515
2011-10-20

Combination pressure switch with manual shutoff

#149
20110206538
2011-08-25

Air compressor

#150
20110123353
2011-05-26

Air compressor with shut-off mechanism

#151
20110068199
2011-03-24

Dispenser having vacuum switch controlled pump with bleed valve

#152
20110052415
2011-03-03

Automatic compressor overpressure control

#153
20110000562
2011-01-06

Controllable vacuum source

#154
20100322786
2010-12-23

PRESSURE CONTROL UNIT

#155
20100278659
2010-11-04

Pressure-controlling appliance for an inflatable product

#156
20100215511
2010-08-26

Level Sensor System

#157
20100163327
2010-07-01

Snowmobile having electronically controlled lubrication

#158
20100012475
2010-01-21

Combination pressure switch

#159
20090320929
2009-12-31

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

#160
20090254246
2009-10-08

Method and apparatus to optimize energy efficiency of air compressor in vehicle air brake application

#161
20090246036
2009-10-01

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

#162
20090214356
2009-08-27

Pump control valve

#163
20090133394
2009-05-28

Method for controlling or regulating the air pressure in a compressed air supply device

#164
20090127926
2009-05-21

Compressed air supply system for a utility vehicle

#165
20090126806
2009-05-21

ADJUSTABLE VACUUM RELIEF SAFETY VALVE SYSTEM FOR SWIMMING POOLS AND SPAS

#166
20090116975
2009-05-07

Screw compressor comprising a relief valve

#167
20090007979
2009-01-08

Pressure accumulating apparatus

#168
20080317607
2008-12-25

Smart blow-down system for variable frequency drive compressor units

#169
20080310966
2008-12-18

Scroll type booster

#170
20080302111
2008-12-11

Apparatus and method for pumping a cryogenic fluid from a storage vessel and diagnosing cryogenic pump performance

#171
20080302109
2008-12-11

Apparatus and method for pumping a fluid from a storage vessel and detecting when the storage vessel is empty

#172
20080279702
2008-11-13

HANDHELD VACUUM SUCTION DEVICE

#173
20080240933
2008-10-02

Air compressor with shut-off mechanism

#174
20080181794
2008-07-31

MOBILE PNEUMATIC COMPRESSOR

#175
20080152512
2008-06-26

INFILTRATION PUMP HAVING INSULATED ROLLERS AND PROGRAMMABLE FOOT PEDAL

#176
20080128006
2008-06-05

Method for controlling a cleaner and cleaner for performing the method

#177
20080041315
2008-02-21

Controllable vacuum source

#178
20070283688
2007-12-13

Arrangement And A Method For Controlling A Work Vehicle

#179
20070275615
2007-11-29

Inflation device

#180
20070237652
2007-10-11

Inflation system

#181
20070188013
2007-08-16

Hydraulically powered air charging arrangement

#182
20070177985
2007-08-02

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

#183
20070177983
2007-08-02

AIRFLOW COMPRESSOR CONTROL SYSTEM AND METHOD

#184
20070164128
2007-07-19

Anti-dry start device

#185
20070122288
2007-05-31

Pressurizing water pump with control valve device

#186
20070110588
2007-05-17

Infiltration pump having insulated rollers and programmable foot pedal

#187
20070081902
2007-04-12

Digital Air Compressor Control System

#188
20070077151
2007-04-05

Control system for air-compressing apparatus

#189
20070068182
2007-03-29

Method for controlling a compressor for conveying a pressure medium in a level adjustment system of a motor vehicle

#190
20070020108
2007-01-25

Modular, universal and automatic closed-loop pump pressure controller

#191
20060275141
2006-12-07

METHOD OF FEEDING AN INERT GAS AND A SYSTEM THEREFOR

#192
20060260034
2006-11-23

Electromechanical safety valve system for swimming pool and spa pumps

#193
20060245941
2006-11-02

Electrical control for pressurized flow device

#194
20060216159
2006-09-28

Multiple compressor control system

#195
20060201556
2006-09-14

Swimming pool vacuum relief safety valve

#196
20060196168
2006-09-07

Air supply system control

#197
20060123737
2006-06-15

Vacuum pump control and vacuum feedback

#198
20060083623
2006-04-20

Compression pump system

#199
20060045752
2006-03-02

Air compressor tools that communicate with an air compressor

#200
20060045751
2006-03-02

Air compressor with variable speed motor

#201
20060018765
2006-01-26

Arrangement and a method for controlling a work vehicle

#202
20060002800
2006-01-05

Compressor control apparatus

#203
20050226736
2005-10-13

Variable phase drive mechanism

#204
20050022471
2005-02-03

Vacuum pump control and vacuum feedback

#205
18432069
2025-06-24

Inflation control system having multiple air compressors

#206
17123744
2021-11-02

Air inflation tool

#207
17104594
2021-11-16

Digital pressure switch systems and methods

#208
16408392
2020-11-10

Portable inflatable apparatus

#209
15149067
2020-09-01

High efficiency, high pressure pump suitable for remote installations and solar power sources