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Class Information
Number: 137/518
Name: Fluid handling > Line condition change responsive valves > Direct response valves (i.e., check valve type) > Biased open > Oppositely swinging vanes
Description: Valves comprising a pair of edge-pivoted vanes biased in opposite directions, the pivot means comprising closely adjacent parallel axes or both vanes being pivoted on the same axis.

Patents under this class:

Patent Number Title Of Patent Date Issued
8316882 Mechanical fuse to seal pipes upon unintended rupture Nov. 27, 2012
8025077 Mechanical fuse to seal pipes upon unintended rupture Sep. 27, 2011
7639151 Liquid blocking apparatus and system equipped with an alarm or wireless calling device and a storing bag Dec. 29, 2009
7114519 Normally open reverse flow flapper valve Oct. 3, 2006
6615864 Torsion spring pool cleaner reed valve Sep. 9, 2003
5992451 Reed valve for pool cleaner Nov. 30, 1999
5592966 Back-flow preventer Jan. 14, 1997
4222408 Check valve Sep. 16, 1980
4091835 Autokinetic sampling nozzle May. 30, 1978

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