ClassID:

167031

G01M3/2876 - CPC Classification

Classification description:

Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for valves

Recent Application in this class:
#1
20260140007
2026-05-21

METHOD FOR CHECKING THE TIGHTNESS OF AN ELEMENT SUCH AS A FLUID MACHINE OR A VALVE

#2
20260085992
2026-03-26

GAS CHROMATOGRAPH VALVE LEAK DETECTOR

#3
20260085507
2026-03-26

DUAL AIR ADMITTANCE VALVE

#4
20260056084
2026-02-26

EVAPORATIVE EMISSIONS LEAK DETECTION MODULE

#5
20260051309
2026-02-19

SYSTEMS AND METHODS FOR PASSIVELY MANAGING ENVIRONMENTAL NOISE

#6
20260049887
2026-02-19

STRUCTURE PLUMBING FLOW SIMULATION APPARATUS

#7
20250389345
2025-12-25

DETECTING PASSING VALVES

#8
20250256224
2025-08-14

SAND SEPERATION CONTROL SYSTEM AND METHOD

#9
20250224303
2025-07-10

BACKFLOW LEAK SENSOR DEFLECTOR

#10
20250189502
2025-06-12

ANALYZER AND ANALYSIS PROCESS WITH SELF-TEST FOR LEAKS

#11
20250155051
2025-05-15

SYSTEMS AND METHODS FOR DETERMINING FAILURE IN A BACK PRESSURE BALANCED RELIEF VALVE

#12
20250136424
2025-05-01

SYSTEMS AND METHODS FOR LEAK DETECTION AND RESOLUTION IN A BEVERAGE DISPENSING SYSTEM

#13
20250122707
2025-04-17

DUAL AIR ADMITTANCE VALVE

#14
20250093891
2025-03-20

PRESSURE REDUCER

#15
20250060272
2025-02-20

CHECK VALVE TESTER

#16
20240426704
2024-12-26

STRUCTURE PLUMBING FLOW SIMULATION APPARATUS

#17
20240369157
2024-11-07

SMART BACK PRESSURE VALVE AND METHODS OF USE

#18
20240361203
2024-10-31

SYSTEM AND METHOD FOR MONITORING VACUUM VALVE CLOSING CONDITION IN VACUUM PROCESSING SYSTEM

#19
20240353284
2024-10-24

Method and Devices for Detecting Output-Side Leaks in a Double Cone Air Power Booster

#20
20240353283
2024-10-24

APPARATUS FOR TESTING LIQUEFIED HYDROGEN VALVE

#21
20240328889
2024-10-03

Indicator for Indicating the Occurrence of a Pressurized Fluid Leak in a Vent Chamber of a Pressurized Fluid Apparatus

#22
20240318745
2024-09-26

SUBSEA TREE VALVE TESTING

#23
20240310235
2024-09-19

NON-INTRUSIVE VALVE ACTIVITY AND STATUS INDICATOR

#24
20240301847
2024-09-12

EVAPORATIVE EMISSIONS SYSTEM VAPOR BLOCKING VALVE LEAK DIAGNOSTIC WITH SINGE PRESSURE SENSOR

#25
20240264030
2024-08-08

LEAK DETECTORS

#26
20240200689
2024-06-20

METHOD FOR DIAGNOSING A PROCESS VALVE ASSEMBLY AND DIAGNOSTIC DEVICE

#27
20240200313
2024-06-20

Backflow Alert System

#28
20240094084
2024-03-21

CHECK VALVE TESTING SYSTEMS AND LEAK DETECTION METHODS USING THE SAME

#29
20240044328
2024-02-08

MUD PUMP VALVE LEAK DETECTION AND FORECASTING

#30
20240024801
2024-01-25

SAND SEPARATION CONTROL SYSTEM AND METHOD

#31
20230330671
2023-10-19

IN-SITU FLUIDIC INSPECTION

#32
20230304886
2023-09-28

VALVE DIAGNOSTIC AND PERFORMANCE SYSTEM

#33
20230279818
2023-09-07

Leak testing apparatus

#34
20230257977
2023-08-17

Dual air admittance valve

#35
20230176596
2023-06-08

Pressure reducer

#36
20230144178
2023-05-11

Automomously reporting plumbing mesh network applications

#37
20230144146
2023-05-11

Detection systems and methods for an elastomer component

#38
20230128369
2023-04-27

DEVICE FOR INSPECTING SEMICONDUCTOR EQUIPMENT AIR VALVE FOR LEAKING

#39
20230092572
2023-03-23

Valve arrangement and method

#40
20230089588
2023-03-23

Test device for detecting sealing performance of one-way valve

#41
20230074111
2023-03-09

FAULT DIAGNOSIS METHOD AND FAULT DIAGNOSIS DEVICE FOR EVAPORATED FUEL PROCESSING DEVICE

#42
20230071698
2023-03-09

Systems and methods for determining failure in a back pressure balanced relief valve

#43
20230016408
2023-01-19

DETECTING A FUEL LEAK IN AN ENGINE FUEL SYSTEM

#44
20230010576
2023-01-12

Vehicle brake system and diagnostic method for determining a leak in one or more three-way valves

#45
20230004176
2023-01-05

SYSTEMS AND METHODS FOR CALIBRATING AND TUNING A MASS FLOW CONTROLLER

#46
20220373426
2022-11-24

System and method for monitoring vacuum valve closing condition in vacuum processing system

#47
20220373423
2022-11-24

Gas leakage meter

#48
20220349775
2022-11-03

SYSTEM AND METHOD FOR LEAK DETECTION BASED ON PRV OUTLET PRESSURE MONITORING

#49
20220349774
2022-11-03

SYSTEM AND METHOD FOR DETERMINING A FASTENER PREDICTIVE LIFE

#50
20220328288
2022-10-13

Inspection method of plasma processing apparatus

#51
20220316482
2022-10-06

Flow testing methods and systems

#52
20220316194
2022-10-06

Dual air admittance valve

#53
20220280940
2022-09-08

In-situ fluidic inspection

#54
20220244121
2022-08-04

Apparatus and method for testing pressure change rate of component in electro-pneumatic braking system of commercial vehicle

#55
20220228945
2022-07-21

VALVE SEAL ASSEMBLIES, VALVE TESTING MACHINES INCLUDING THE SAME, AND ASSOCIATED METHODS

#56
20220196513
2022-06-23

Test device and method for automatic pressure regulating valve of electronic braking system

#57
20220146363
2022-05-12

Systems, devices, and methods for detecting and controlling leaks of liquids or gases

#58
20220136925
2022-05-05

Pressure-adjustable auxiliary control system for high-pressure gas sealing detection

#59
20220112961
2022-04-14

In-line testing of pressure safety valves

#60
20220112698
2022-04-14

A TESTING DEVICE FOR BACKFLOW PREVENTION DEVICES

#61
20220107240
2022-04-07

Valve diagnostic and performance system

#62
20220065732
2022-03-03

System and method for line pressure testing with isolation valve

#63
20220065731
2022-03-03

EVAPORATED FUEL PROCESSING DEVICE

#64
20220047970
2022-02-17

Sand separation control system and method

#65
20210388831
2021-12-16

Mud pump valve leak detection and forecasting

#66
20210373525
2021-12-02

DIAGNOSIS METHOD FOR A PROCESS VALVE, DIAGNOSIS MODULE AND PROCESS VALVE

#67
20210348983
2021-11-11

Systems for leak testing a valved conduit

#68
20210341078
2021-11-04

Systems and methods for determining failure in a back pressure balanced relief valve

#69
20210325275
2021-10-21

Fluid meter arranged to detect a leak and to make an installation safe

#70
20210302264
2021-09-30

Fluid control device, abnormality detection method of fluid control device, abnormality detection device, and abnormality detection system

#71
20210299661
2021-09-30

In-situ fluidic inspection

#72
20210293354
2021-09-23

Method for monitoring fire-fighting system valve with sensor arranged outside the valve

#73
20210277770
2021-09-09

Method and apparatus for testing the blowout preventer (BOP) on a drilling rig

#74
20210270387
2021-09-02

METHOD OF AND APPARATUS FOR FUNCTIONALLY TESTING A PRESSURE ACTUATED REGULATOR

#75
20210247263
2021-08-12

System and method for leak detection based on PRV outlet pressure monitoring

#76
20210246769
2021-08-12

Gas lift valve aging process and apparatus

#77
20210231516
2021-07-29

Leak Detection System and Method

#78
20210215269
2021-07-15

Fluid control device

#79
20210205735
2021-07-08

Sand separation control system and method

#80
20210199214
2021-07-01

System for testing a valve

#81
20210146907
2021-05-20

Vehicle brake system and diagnostic method for determining a leak in one or more three-way valves

#82
20210146906
2021-05-20

Vehicle brake system and diagnostic method for determining a leak in a simulator valve

#83
20210131459
2021-05-06

Valve device and method for anticipating failure in a solenoid valve assembly in a manifold assembly

#84
20210072111
2021-03-11

Sealing adapters, pressure testing systems and pressure testing system kits including the same, and associated methods

#85
20210018115
2021-01-21

Dual purpose position indicator

#86
20200362988
2020-11-19

Valve monitoring system for a coaxial dual-safety valve

#87
20200340711
2020-10-29

System for water management, and related methods

#88
20200292407
2020-09-17

Fluid control apparatus, diagnostic method and program record medium for recording programs of fluid control apparatus

#89
20200269076
2020-08-27

Wearable mask fit monitor

#90
20200264068
2020-08-20

SYSTEMS AND METHODS FOR FLUID LEAK DETECTION

#91
20200264067
2020-08-20

Fluid usage monitoring and control system

#92
20200249706
2020-08-06

High integrity protection system for hydrocarbon flow lines

#93
20200249065
2020-08-06

Flow Sensor

#94
20200232873
2020-07-23

Flow rate control device and abnormality detection method using flow rate control device

#95
20200217745
2020-07-09

Automated Bop Control and Test System

#96
20200159004
2020-05-21

Endoscope leak test connector, endoscope leak tester and endoscope reprocessor

#97
20200149649
2020-05-14

Pressurized fluid system including an automatic bleed valve arrangement; components; and, methods

#98
20200110001
2020-04-09

Dense phase pump diagnostics

#99
20200080881
2020-03-12

Product inventory monitoring

#100
20200063892
2020-02-27

METHOD FOR PREDICTING VALVE LEAKAGE

#101
20200063411
2020-02-27

Dual air admittance valve

#102
20200042021
2020-02-06

Systems And Methods For Calibrating And Tuning A Mass Flow Controller

#103
20200033225
2020-01-30

System and method for monitoring vacuum valve closing condition in vacuum processing system

#104
20190368337
2019-12-05

Method and apparatus for testing the blowout preventer (BOP) on a drilling rig

#105
20190339156
2019-11-07

Hydrostatic and vibration test method for a blowout preventer

#106
20190294184
2019-09-26

High integrity protection system for hydrocarbon flow lines

#107
20190271611
2019-09-05

Method for testing for fluid leaks

#108
20190271225
2019-09-05

BOP elastomer health monitoring

#109
20190242777
2019-08-08

Line pressure isolation valve

#110
20190242776
2019-08-08

Test cylinder of valve assembly and connection structure for the same

#111
20190234826
2019-08-01

Leakage Control System for Spent Fuel Cooling Pool

#112
20190186511
2019-06-20

Leakage modulation in hydraulic systems containing a three-way spool valve

#113
20190186510
2019-06-20

Leakage modulation in hydraulic systems containing a three-way spool valve

#114
20190178748
2019-06-13

Apparatus and method for detecting leakage in hydrogen tank of hydrogen fuel cell vehicle

#115
20190178746
2019-06-13

Load-sensitive multi-path valve testing device and testing method

#116
20190170606
2019-06-06

Diagnostic system for a closed fluid system

#117
20190145851
2019-05-16

Hydrostatic and vibration test method for a blowout preventer

#118
20190120716
2019-04-25

Blockage diagnosis device

#119
20190101069
2019-04-04

Gas valve unit and a method of performing a pressure test to a gas valve unit

#120
20190094101
2019-03-28

LEAK SENSOR ASSEMBLIES AND SYSTEMS UTILIZING SAME

#121
20190086289
2019-03-21

Testing device and system for a backflow preventer

#122
20190078965
2019-03-14

Valve operator including a fugitive emissions detector, and a method of detecting fugitive emissions from an industrial valve

#123
20190072452
2019-03-07

VALVE MANIFOLD

#124
20190056286
2019-02-21

Methods of leak testing a surgical conduit

#125
20190048820
2019-02-14

SYSTEMS FOR FUEL DELIVERY

#126
20190041292
2019-02-07

Fuel vapor processing device

#127
20190025152
2019-01-24

Automated bop control and test system

#128
20180308730
2018-10-25

Processing apparatus, abnormality detection method, and storage medium

#129
20180275012
2018-09-27

Aseptic filter vent valve and port for integrity testing

#130
20180245447
2018-08-30

Pre-job operation valve checks

#131
20180238028
2018-08-23

Work machine

#132
20180214726
2018-08-02

System and method for detecting fluid leak

#133
20180202891
2018-07-19

Pressure testing systems with safety interlock

#134
20180180509
2018-06-28

Method for inspecting for leaks in gas supply system valves

#135
20180128706
2018-05-10

Water leakage detection system

#136
20180106698
2018-04-19

Human-machine interface for gas valve

#137
20180086326
2018-03-29

Method for diagnosing fault in a vacuum system including a check valve

#138
20180058253
2018-03-01

Advanced tightness test evaluation module for a valve and actuator monitoring system

#139
20180052071
2018-02-22

Method and System for Determining a Fluid Leak

#140
20180045597
2018-02-15

Detecting fluid leaks in pressurized systems of waterjet cutting systems

#141
20180031440
2018-02-01

BOP TEST APPARATUS

#142
20180017423
2018-01-18

Flow sensor

#143
20170350784
2017-12-07

Controlling a vacuum system comprising a vacuum generator arrangement

#144
20170315015
2017-11-02

Leakage detection device and water system comprising a leakage detection device

#145
20170241566
2017-08-24

Replacement necessity determination device for snap-in valve

#146
20170241558
2017-08-24

Pressurized fluid system including an automatic bleed value arrangement; components; and, methods

#147
20170205310
2017-07-20

Reducing thermal effects during leak testing

#148
20170204717
2017-07-20

Systems and methods for pressure testing well control equipment

#149
20170198831
2017-07-13

SYSTEM AND METHOD FOR MONITORING PERFORMANCE OF RELIEF VALVES IN A HYDRAULIC SYSTEM

#150
20170172399
2017-06-22

Endoscope reprocessor and fault detection method

#151
20170146426
2017-05-25

Fuel tank system

#152
20170074748
2017-03-16

Normalized Hydrostatic Test Method

#153
20170067578
2017-03-09

DETECTION OF HIGH STAGE VALVE LEAKAGE BY PRESSURE LOCKUP

#154
20170052088
2017-02-23

Dense phase pump diagnostics

#155
20170016799
2017-01-19

Respiratory gas monitor testing system and methods of use

#156
20170003200
2017-01-05

Method and apparatus for real time enhancing of the operation of a fluid transport pipeline

#157
20160341627
2016-11-24

Valve manifold

#158
20160340998
2016-11-24

Proof testing apparatus and method for reducing the probability of failure on demand of safety rated hydraulic components

#159
20160334300
2016-11-17

Hydrostatic Pressure Test Method

#160
20160334029
2016-11-17

VALVE TRACKER

#161
20160327447
2016-11-10

Automated blowout preventer control and testing system

#162
20160313208
2016-10-27

Method for testing for fluid leaks

#163
20160290889
2016-10-06

Hydrostatic and vibration test system for a blowout preventative

#164
20160275825
2016-09-22

Pressure regulator with identification device

#165
20160266004
2016-09-15

Surgical conduit leak testing

#166
20160223427
2016-08-04

Valve testing apparatus and method, especially suitable for compressor valve testing

#167
20160201572
2016-07-14

Transient fault detection methods and systems

#168
20160069772
2016-03-10

Valve operation and diagnosis

#169
20160069473
2016-03-10

Gas valve with electronic valve proving system

#170
20160059839
2016-03-03

Method for detecting fluid leakage

#171
20150343828
2015-12-03

Method of documenting installation of a fluid handling device in a fluid flow system

#172
20150240968
2015-08-27

Apparatus for fluid control device leak detection

#173
20150217317
2015-08-06

COLOR-CHANGER

#174
20150107703
2015-04-23

FLOW CONTROL VALVE

#175
20150082870
2015-03-26

Device for detecting fluid leakage

#176
20150051848
2015-02-19

Combination tester

#177
20150040645
2015-02-12

Device and method for diagnosing evaporated fuel processing device

#178
20150013436
2015-01-15

Diagnostic system for bulk well material handling plants

#179
20150007639
2015-01-08

Method of testing a gas shut-down valve and a system for exercising the method

#180
20140182360
2014-07-03

Evaporated fuel processing device and method for diagnosing evaporated fuel processing device

#181
20140174158
2014-06-26

Method for checking the leakproofness of safety valves

#182
20140165706
2014-06-19

Pressure indicating device

#183
20140102575
2014-04-17

Energized packing retainer

#184
20140047902
2014-02-20

Device and method for quantifying a leakage flow on an actuator

#185
20140041738
2014-02-13

Apparatus for fluid control device leak detection

#186
20140034158
2014-02-06

Apparatus for monitoring of valves and method of operating the same

#187
20130333457
2013-12-19

Device and method for dynamic pressure loss and valve seal-tightness testing on a four stroke internal combustion engine

#188
20130294934
2013-11-07

System and method for a compressor

#189
20130223494
2013-08-29

Time-stamped emissions data collection for process control devices

#190
20130180317
2013-07-18

On board seat leakage detection system

#191
20130154841
2013-06-20

Gas valve with valve leakage test

#192
20130153042
2013-06-20

Gas valve with high/low gas pressure detection

#193
20130152673
2013-06-20

Gas valve with electronic valve proving system

#194
20130061954
2013-03-14

Valve packing fugitive emission detection system

#195
20130032213
2013-02-07

Paint material switching path and colour changer

#196
20120285222
2012-11-15

Apparatus and method for testing float equipment

#197
20120239315
2012-09-20

VALVE FAULT TEST SYSTEM

#198
20120150455
2012-06-14

System and method for determining leaks in a complex system

#199
20110307191
2011-12-15

METHOD OF DETERMINING POSITION OF A VALVE

#200
20110284781
2011-11-24

Isolation valve with integrated sensor

#201
20110100096
2011-05-05

Method and system for fluid valve leak detection

#202
20100162797
2010-07-01

Methods and systems for valve leak simulation

#203
20100095744
2010-04-22

Leak detector

#204
20100064778
2010-03-18

TESTING APPARATUS AND METHOD FOR VALVES

#205
20100043896
2010-02-25

Apparatus and method for detecting a leak within a duplex valve assembly

#206
20090303057
2009-12-10

Leak detector for process valve

#207
20090295588
2009-12-03

Method and apparatus for verifying a leak in connection with a flow inhibitor

#208
20090184271
2009-07-23

Fluid flow control valve

#209
20090178463
2009-07-16

Method and apparatus for fluid pressure testing

#210
20090013767
2009-01-15

Liquid flow measurement apparatus and method utilizing a bubble in a passage

#211
20080314120
2008-12-25

Method and device for determining hydraulic leakage rate in liquid-conveying sections, in particular, injection valves of internal combustion engines

#212
20080223111
2008-09-18

System for detecting hydraulic fluid leaks

#213
20080092632
2008-04-24

Method and system for function testing a valve

#214
20080072657
2008-03-27

Method for testing a hydraulic manifold

#215
20070151329
2007-07-05

Engine oil leak test method with EGR valve leak offset

#216
20070068225
2007-03-29

Leak detector for process valve

#217
20050066709
2005-03-31

Apparatus and method for on-line detection of leaky valve seals and defective flow diverters

#218
17065308
2022-06-28

One-way valve tester and method of using same

#219
16429893
2020-01-14

System for water management, and related methods

#220
14841219
2017-10-10

Method and system for diagnoses and prognoses of low temperature limit control valve

#221
14679511
2016-07-05

Integrity monitoring of 4-way diverter valve

#222
14545476
2018-12-25

Method and apparatus for testing the blowout preventer (BOP) on a drilling rig

#223
12931869
2014-06-10

Water leak detection and shut-off method and apparatus using differential flow rate sensors