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Class Information
Number: 137/533.21
Name: Fluid handling > Line condition change responsive valves > Direct response valves (i.e., check valve type) > Reciprocating valves > Weight biased > Valve body is the weight > Guided head > Guide stem
Description: Devices in which there is provided a rod-like guiding element usually substantially smaller in diameter than the head.










Sub-classes under this class:

Class Number Class Name Patents
137/533.31 Guide and closure integral unit 46
137/533.29 Guide and seat integral unit 17
137/533.27 Head slidable on guide rod 34
137/533.25 Oppositely disposed 27
137/533.23 With closing stop 7


Patents under this class:

Patent Number Title Of Patent Date Issued
8636027 Vent with improved seal Jan. 28, 2014
8342168 System for heating liquid by solar radiation Jan. 1, 2013
8251092 Flow based pressure isolation mechanism for a fluid delivery system Aug. 28, 2012
7971605 Air admittance vent diaphragm assembly Jul. 5, 2011
7640945 Oneway valve for automatically inflatable air cushion Jan. 5, 2010
7506663 Magnetic check valve Mar. 24, 2009
7438090 Booster valve Oct. 21, 2008
6912851 Hydraulic brake valve Jul. 5, 2005
6835053 Check valve Dec. 28, 2004
6581633 Check valve and method of fabrication Jun. 24, 2003
RE37989 Pressure relief valve for pressure equalization between a closed space and the surrounding atmosphere Feb. 18, 2003
6457760 High speed insertion bailer having snap-in spider for valve alignment Oct. 1, 2002
6457486 Bailer having leak-inhibiting seal Oct. 1, 2002
6390123 Bailer having leak-inhibiting seal May. 21, 2002
6286880 Bailer having leak-inhibiting cushioned seal Sep. 11, 2001
RE37322 Two-piece check valve assembly Aug. 14, 2001
6263907 Valve device of a storage tank for transporting oils or chemical compounds Jul. 24, 2001
6135523 Bailer having leak-inhibiting seal Oct. 24, 2000
5979497 Check valve Nov. 9, 1999
5904179 Inlet check valve May. 18, 1999
5873384 Pressure relief valve for pressure equalization between a closed space and the surrounding atmosphere Feb. 23, 1999
5803112 Reflux valve means Sep. 8, 1998
5678657 Lubricating device for rotary compressors Oct. 21, 1997
5669412 Two-piece check valve assembly Sep. 23, 1997
5295502 Non-refillable valve Mar. 22, 1994
5232016 Vacuum storage container Aug. 3, 1993
5195552 Check valve with exchangeable valving elements Mar. 23, 1993
5121590 Vacuum packing apparatus Jun. 16, 1992
5092744 Intensifier Mar. 3, 1992
5082020 Valve body for oilfield applications Jan. 21, 1992
5062450 Valve body for oilfield applications Nov. 5, 1991
4827538 Mixing fixture for flexible-pipe spray head May. 9, 1989
4753642 Container-valve assembly Jun. 28, 1988
4741325 Operating valve for a pressure cooker May. 3, 1988
4724927 Suction housing of a lubricating-oil pump for the lubricating-oil storage tank of a motor vehicle Feb. 16, 1988
4543980 Valve for pressurized containers Oct. 1, 1985
4535808 Check valve Aug. 20, 1985
4340080 Inflation valve Jul. 20, 1982
4307707 Control valve for solar heating systems Dec. 29, 1981
4237980 Check valve for fluid-producing wells Dec. 9, 1980
4050243 Combination solid fuel ramjet injector/port cover Sep. 27, 1977











 
 
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