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Class Information
Number: 137/519.5
Name: Fluid handling > Line condition change responsive valves > Direct response valves (i.e., check valve type) > Biased open > Weight biased > Ball valves
Description: Valves wherein the moving element is substantially spherical.










Patents under this class:
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Patent Number Title Of Patent Date Issued
8607746 Cooling system expansion tank Dec. 17, 2013
8408228 Flow control valve for a broken sprinkler Apr. 2, 2013
8403241 Filter case for shower having function of adjusting quantity of outflow of filling material Mar. 26, 2013
8312889 Combination flow control valve and reverse flow check valve Nov. 20, 2012
7500968 Unidirectional urine collection reservoir Mar. 10, 2009
7331564 Normally open high flow hydraulic pressure control actuator Feb. 19, 2008
7318592 Motorcycle steering damper Jan. 15, 2008
7194857 Ventilation valve of hydraulic jack Mar. 27, 2007
7171981 Flow control device and system Feb. 6, 2007
7108281 Stored gas inflator with fill valve assembly Sep. 19, 2006
7104277 Valve for controlling a tank internal gas pressure Sep. 12, 2006
7033134 Air turbine starter having a force balanced, pressure energized, weighted check valve Apr. 25, 2006
6981516 Fail save shut off valve for filtering systems employing candle filters Jan. 3, 2006
6840917 Implantable subcutaneous valve for the treatment of hydrocephalus, and adjusting devices therefor Jan. 11, 2005
6543474 Pressure equalizing check valve Apr. 8, 2003
6536328 Damper valve for hydraulic power-assisted steering system Mar. 25, 2003
6439506 Ventilation valve with a breathing channel for a tank container of a helicopter Aug. 27, 2002
6416713 Fluid dispenser Jul. 9, 2002
6341618 Plumbing stop valve and method of use Jan. 29, 2002
6314988 Flood control valve assembly Nov. 13, 2001
6263912 Fluid flow control valve Jul. 24, 2001
6263911 Fluid flow control valve Jul. 24, 2001
6260575 Fluid flow control valve Jul. 17, 2001
6202678 Gas discriminating valve for shutting off excessive flow of liquids Mar. 20, 2001
6199584 Fluid flow control valve Mar. 13, 2001
6155285 Gas safety valve Dec. 5, 2000
6109896 Piston pump Aug. 29, 2000
6045759 Fluid dispenser Apr. 4, 2000
5983935 LP gas container valve against disasters Nov. 16, 1999
5983928 Gas safety valve Nov. 16, 1999
5975130 Check valve with a low inertia moving part for low or high pressure differentials Nov. 2, 1999
5816313 Pump, and earth-testable spacecraft capillary heat transport loop using augmentation pump and check valves Oct. 6, 1998
5791374 Check valve for the pre-combustion chamber of an internal combustion engine Aug. 11, 1998
5762093 Fuel overflow restrictor/water intake restraining devices Jun. 9, 1998
5662138 Drop head structure Sep. 2, 1997
5576486 Electronic flowmeter system with a stopper against undesirable flows, leak detector and bypass for measuring low flows Nov. 19, 1996
5564457 Vacuum breaker valve with CIP capability Oct. 15, 1996
5529333 Apparatus for use in inflating an air bag and method of making the apparatus Jun. 25, 1996
5400967 Pressure-compensated self-flushing dripper Mar. 28, 1995
5361877 Diaphragm-type pneumatic brake actuator with closing valve Nov. 8, 1994
5340027 Pressure-compensated self-flushing dripper Aug. 23, 1994
5336166 Three stage implantable valve Aug. 9, 1994
5287886 Gas line override valve Feb. 22, 1994
5218992 Check valve retainer Jun. 15, 1993
5176165 Air gap apparatus Jan. 5, 1993
5086802 Safety check valve Feb. 11, 1992
5086613 Check-relief valve for a hydraulic circuit Feb. 11, 1992
5065791 Fluid purifying apparatus and method of purifying fluids Nov. 19, 1991
5022435 Gas regulator with safety device Jun. 11, 1991
4964273 Subplate-mounted control valves in convertible oscillator drive system Oct. 23, 1990

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