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Class Information
Number: 137/329.4
Name: Fluid handling > With repair, tapping, assembly, or disassembly means > Removable valve with normally disabled supplemental check valve > Check valve disabled by normally movable main valve part > Spring bias
Description: Devices having a spring bias to close the check valve or to supplement the bias of the fluid.










Patents under this class:

Patent Number Title Of Patent Date Issued
7648175 Medical gas outlet with support bracket Jan. 19, 2010
7077157 Spring-loaded pressure relief valve, particularly for containers of pressurized fluids Jul. 18, 2006
7040341 Gas plug connector May. 9, 2006
6607105 Stopper for wine or champagne preservation and dispensing apparatus Aug. 19, 2003
6347643 Gas outlet barrel retention apparatus Feb. 19, 2002
6230737 Cylinder valve assembly May. 15, 2001
6189560 Connector assembly for medical gas service outlet Feb. 20, 2001
6116265 Removable frost proof hydrant Sep. 12, 2000
5992441 Fuel vapor vent valve Nov. 30, 1999
5975486 Valve combination Nov. 2, 1999
5538690 Air quality indicator system for breathing air supplies Jul. 23, 1996
5538690 Air quality indicator system for breathing air supplies Jul. 23, 1996
4848661 Sprinkler head shutoff valve Jul. 18, 1989
4706847 Dispenser for wine Nov. 17, 1987
4437487 Lightning protected check-type drain valve Mar. 20, 1984
4344455 Coupling assembly Aug. 17, 1982
4120314 Remote actuated flush valve Oct. 17, 1978
4067354 Gas pressure regulator having high and low pressure shutoff means Jan. 10, 1978
3930517 Safety valve Jan. 6, 1976











 
 
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