ClassID:

143126

F04B49/035 - 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 valves Bypassing

Recent Application in this class:
#1
20250270961
2025-08-28

DIRECT CONTROL VARIABLE DISPLACEMENT PUMP WITH DUAL-FUNCTION HIGH-PRESSURE RELIEF VALVE-PRESSURE REGULATING VALVE

#2
20240410629
2024-12-12

COMPRESSOR AND REFRIGERATION CYCLE DEVICE HAVING THE SAME

#3
20240392773
2024-11-28

DIRECT CONTROLLED VARIABLE DISPLACEMENT VALVES WITH DUAL SET POINT PRESSURE RELIEF

#4
20240280101
2024-08-22

Reversible Reciprocating Pump

#5
20240241526
2024-07-18

HIGH TURN DOWN RATIO DIRECT CONTROL FOR VARIABLE DISPLACEMENT PUMPS WITH FLOW SENSING

#6
20240010179
2024-01-11

Air Dryer Apparatus for a Vehicle Air Brake Charging System

#7
20230220845
2023-07-13

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

#8
20230118844
2023-04-20

ELECTRONICALLY COMMUTATED HYDRAULIC MACHINE AND OPERATING METHOD TO REDUCE GENERATION OF RESONANCE EFFECTS

#9
20220356878
2022-11-10

Reversible Reciprocating Pump

#10
20220347888
2022-11-03

System and method to auto-pressurize prior to dispense in a circulation dispense system

#11
20220146171
2022-05-12

Compressor and refrigeration cycle device having the same

#12
20220128053
2022-04-28

Reversible Reciprocating Pump

#13
20220099084
2022-03-31

Miniature fluid transportation device

#14
20220065241
2022-03-03

Discharge cut-off valve

#15
20220034312
2022-02-03

Air compression pump

#16
20210126566
2021-04-29

Low-speed high torque motor control and foam system

#17
20210071658
2021-03-11

Diaphragm pump

#18
20210025377
2021-01-28

Valve unit for pumps

#19
20200263681
2020-08-20

Air compressor system control

#20
20200200165
2020-06-25

PRESSURE REGULATING BYPASS VALVE

#21
20200191138
2020-06-18

Hydrostatic system providing volumetric efficiency when pump is neutral

#22
20200191131
2020-06-18

Flexible supply gas routing for gas compressors

#23
20200149527
2020-05-14

Loadless start valve for a compressor

#24
20200116141
2020-04-16

High pressure pump and method for compressing a fluid

#25
20200088219
2020-03-19

Pneumatic pump

#26
20200032787
2020-01-30

Bypass and pressure adjustment valve

#27
20190176786
2019-06-13

Piston pump having an operating chamber with an inlet and an outlet a pressure medium connection and a connecting duct fluidly connecting the pressure medium connection to the operating chamber in an alternating controllable manner

#28
20190107255
2019-04-11

Apparatus for flexible, programmed, controlled transfer of liquids in multi-tank systems

#29
20190085807
2019-03-21

High-pressure fuel pump having a piston, a damper, and a pressure relief valve having a valve body and a spring

#30
20180354485
2018-12-13

Fluid delivery system

#31
20180320682
2018-11-08

Relief valve assembly and components thereof

#32
20180291911
2018-10-11

Whole home water appliance system

#33
20180272392
2018-09-27

Systems and methods for managing heat transfer in a pressure washer

#34
20180171997
2018-06-21

Pump Assisted Chemical Feeder

#35
20180156015
2018-06-07

Hydraulically actuated double-acting positive displacement pump system for producing fluids from a deviated wellbore

#36
20180017051
2018-01-18

Manual pump

#37
20180010601
2018-01-11

Mud pump sealing assembly

#38
20180010404
2018-01-11

Self-aligning mud pump assembly

#39
20170321680
2017-11-09

Compressor

#40
20170306813
2017-10-26

Oil pump assembly for a vehicle lubrication system

#41
20170184093
2017-06-29

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

#42
20160333868
2016-11-17

Volumetric metering unit

#43
20160176266
2016-06-23

Compressor comprising a pressure-relief groove

#44
20160160825
2016-06-09

High-pressure fuel pump

#45
20160146108
2016-05-26

Fuel pumping unit

#46
20160025054
2016-01-28

High pressure pump having unitary discharge and relief valve

#47
20160017881
2016-01-21

Diaphragm pump

#48
20150360910
2015-12-17

Auxiliary pumping unit

#49
20150198152
2015-07-16

Peristaltic hose pump

#50
20150144655
2015-05-28

Supplying device of fixed colorants volume for a colorant dispenser

#51
20150004036
2015-01-01

Relief valve assembly and components thereof

#52
20140369858
2014-12-18

Device and method for preparing liquified natural gas (LNG) fuel

#53
20140294618
2014-10-02

Hydraulic pressure supply system of automatic transmission

#54
20140234131
2014-08-21

Pressure monitoring device for controlling a compressor

#55
20140161654
2014-06-12

Pump, in particular pneumatic pump

#56
20140109544
2014-04-24

High pressure relief valve closure

#57
20140044567
2014-02-13

Reciprocating pump valve assembly with thermal relief

#58
20130323091
2013-12-05

Hydraulic System and Pressure Limiting Valve

#59
20130189127
2013-07-25

Adjustable hydraulic pump

#60
20130180596
2013-07-18

Vacuum system

#61
20130092019
2013-04-18

Cylinder head for a compressor

#62
20120251366
2012-10-04

High pressure pump having unitary discharge and relief valve

#63
20120211034
2012-08-23

Pump for a high-pressure cleaning appliance

#64
20120107159
2012-05-03

Bypass unloader valve for compressor capacity control

#65
20120051943
2012-03-01

PERISTALTIC HOSE PUMP

#66
20120045348
2012-02-23

Integral plus proportional dual pump switching system

#67
20110277625
2011-11-17

Piston air compressor

#68
20110200455
2011-08-18

Compressed-air compressor and method of operation

#69
20110103976
2011-05-05

Device and method for preparing liquefied natural gas (LNG) fuel

#70
20100329894
2010-12-30

System and method for control of devices internal to a hermetic compressor

#71
20100059603
2010-03-11

High-pressure cleaning appliance

#72
20090252621
2009-10-08

High pressure fuel pump

#73
20090116976
2009-05-07

High-pressure liquid supply pump

#74
20090068041
2009-03-12

Low back-flow pulsation fuel injection pump

#75
20090060764
2009-03-05

Medical Pump

#76
20090041588
2009-02-12

Active valve system for positive displacement pump

#77
20080034772
2008-02-14

METHOD AND SYSTEM FOR AUTOMATIC CAPACITY SELF-MODULATION IN A COMRPESSOR

#78
20080025851
2008-01-31

Inverted pressure regulating valve for an engine oil pump

#79
20080008604
2008-01-10

HIGH-FREQUENCY CONTROL OF DEVICES INTERNAL TO A HERMETIC COMPRESSOR

#80
20070286742
2007-12-13

High-pressure fuel pump

#81
20070253838
2007-11-01

Air compressor unloader system

#82
20070140872
2007-06-21

COMPRESSOR ASSEMBLY FOR AIR CONDITIONER SYSTEM

#83
20070110603
2007-05-17

High-pressure fuel pump

#84
20060165540
2006-07-27

Auto valve priming pump

#85
20060162356
2006-07-27

Capacity-variable air conditioner

#86
20060083634
2006-04-20

Pressure washer having oilless high pressure pump

#87
20050254962
2005-11-17

Fuel pump with internal pressure regulation

#88
20050235685
2005-10-27

Pressure equalizer of compressor of air conditioner

#89
20050066673
2005-03-31

Pressure equalization system

#90
20050008506
2005-01-13

Hydraulic axial piston pump

#91
18589583
2025-08-26

Direct control variable displacement pump with dual-function high-pressure relief valve- pressure regulating valve

#92
18499790
2024-10-01

Systems and methods for maintaining the prime of a pump