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Class Information
Number: 137/329.1
Name: Fluid handling > With repair, tapping, assembly, or disassembly means > Removable valve with normally disabled supplemental check valve
Description: Apparatus in which the main valve is arranged to be removable and a supplemental check valve is provided upstream, biased to close by fluid pressure and/or a spring; the check-valve being maintained inoperative in normal use of the main valve.

Sub-classes under this class:

Class Number Class Name Patents
137/329.2 Check valve disabled by normally movable main valve part 9

Patents under this class:

Patent Number Title Of Patent Date Issued
7201003 Magnet vent assembly apparatus Apr. 10, 2007
6347643 Gas outlet barrel retention apparatus Feb. 19, 2002
6189560 Connector assembly for medical gas service outlet Feb. 20, 2001
6000632 Pop-up sprinkler head with maintenance features Dec. 14, 1999
5927557 Reservoir and faucet assembly for a water cooler Jul. 27, 1999
5720433 Draw back valve for a glue gun Feb. 24, 1998
5555908 Valved PRN adapter for medical access devices Sep. 17, 1996
5236005 Quick connect wall outlet for medical gas service outlet Aug. 17, 1993
5143049 Pump for secondary circulation Sep. 1, 1992
5141012 Cartridge-type disconnectable pressure relief valve system Aug. 25, 1992
5067515 Compact spray gun Nov. 26, 1991
4699356 Sampling valve Oct. 13, 1987
4683905 Fluid distribution connector, in particular for hospitals Aug. 4, 1987
4509554 High and low pressure, quick-disconnect coupling Apr. 9, 1985
4250919 Constant flow valve Feb. 17, 1981
4190075 Double valve construction Feb. 26, 1980
4123089 Gas service unit Oct. 31, 1978
3931829 Valved service outlet Jan. 13, 1976

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