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Class Information
Number: 137/624.27
Name: Fluid handling > Systems > Line condition change responsive release of valve
Description: Device wherein an impediment means is provided to maintain a valve in one position of adjustment, and wherein a means responsive to a change in the fluid condition is effective, upon such change, to remove or disable the impediment means or to override its holding action to permit movement of the valve from the one position.

Patents under this class:
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Patent Number Title Of Patent Date Issued
8667987 Flow controlled switching valve Mar. 11, 2014
8667978 Method and system for detecting water system leaks Mar. 11, 2014
8616521 Fail safe retaining plug assembly for a slam-shut safety device Dec. 31, 2013
8573244 Non-simmer relief valve Nov. 5, 2013
8561640 Latching check valve Oct. 22, 2013
8523142 Actuator with pre-determined failure mode Sep. 3, 2013
8485225 Flow control screen assembly having remotely disabled reverse flow control capability Jul. 16, 2013
8448664 Fluid control device with fluid temperature display May. 28, 2013
8297313 Pressure abatement emergency shut down assembly with a collapsible member retained valve member Oct. 30, 2012
8261761 Selectively movable seat arrangement and method Sep. 11, 2012
8104505 Two-way actuator and method Jan. 31, 2012
7775283 Valve for equalizer sand screens Aug. 17, 2010
7770652 Ball release procedure and release tool Aug. 10, 2010
7735749 Display fountain, system, array and wind detector Jun. 15, 2010
7509973 System to prevent excess fluid flow with a secondary resetting shut-off valve assembly Mar. 31, 2009
7438087 Overpressure rotary valve assembly with locking pin and collapsible member Oct. 21, 2008
7387659 Pneumatically operated automatic shutoff circuit for controlling the generation of gas Jun. 17, 2008
7370671 Valve activation assembly which mechanically collapses a collapsible member in response to both overpressure and underpressure conditions May. 13, 2008
6976504 Selectable detent relief valve Dec. 20, 2005
6923212 Fail safe apparatus for a direct-drive servovalve Aug. 2, 2005
6799597 Pressure control system which detects and abates overpressure and underpressure conditions in a pressurized fluid Oct. 5, 2004
6742537 Combination solenoid operated flow control and shut-off valve with pressure transducer Jun. 1, 2004
6666230 Pressure relief system with trigger activated valve Dec. 23, 2003
6397877 Blowdown manifold evacuator for nuclear power plants Jun. 4, 2002
6167909 Corrosion and contaminant resistant slide valve Jan. 2, 2001
6155284 Buckling pin latch actuated safety relief valve Dec. 5, 2000
6148788 Valve for liquids Nov. 21, 2000
6109162 Control valve system Aug. 29, 2000
6102060 Detachable locking device for a control valve and method Aug. 15, 2000
6047732 Directional control valve Apr. 11, 2000
6047731 Pressure fitting, in particular a pressure relief and safety valve Apr. 11, 2000
5878955 Irrigation device having a two-step valve assembly Mar. 9, 1999
5836337 Large diameter low pressure relief valve Nov. 17, 1998
5829478 Condition sensing hydromechanical fuze Nov. 3, 1998
5683071 Apparatus for controlling selectively engageable detents in a pilot controller Nov. 4, 1997
5325895 Device for filling and closing pressurized-steam containers Jul. 5, 1994
5240034 Safety and automatic stop device, in particular for gas expansion stations Aug. 31, 1993
5176163 Flow-controlled irrigation system Jan. 5, 1993
5158104 Pilot-operated spill valve assembly Oct. 27, 1992
5000207 Apparatus suitable for processing semiconductor slices Mar. 19, 1991
4936346 Detent mechanism for a control valve Jun. 26, 1990
4913190 Detent mechanism for a control valve Apr. 3, 1990
4862919 Hydraulic control system for a multi-position valve Sep. 5, 1989
4813492 Low pressure shut off device contained within a pneumatic tool Mar. 21, 1989
4651972 Rotary flow control apparatus Mar. 24, 1987
4625762 Auto-fill flow valve Dec. 2, 1986
4579315 Valve for fire suppression Apr. 1, 1986
4538307 Flood level sensor for fluid filling systems Sep. 3, 1985
4523602 Pressure controller Jun. 18, 1985
4520845 Hydraulic distributors Jun. 4, 1985

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