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Class Information
Number: 137/247.23
Name: Fluid handling > With liquid valves or liquid trap seals > Liquid seal in liquid flow line; flow liquid forms seal > Valves > Line condition change responsive > Ball valve > Seats vertically up
Description: Apparatus having a seat lying in a general horizontal plane above the valve.

Patents under this class:

Patent Number Title Of Patent Date Issued
6859956 P-trap for plumbing drainage systems Mar. 1, 2005
6779553 Emergency backflow system Aug. 24, 2004
6341618 Plumbing stop valve and method of use Jan. 29, 2002
6314988 Flood control valve assembly Nov. 13, 2001
6095179 Flood control valve assembly Aug. 1, 2000
4928727 Flash flood control units for housing construction May. 29, 1990
4046161 Non-return valve for preventing back flow of waste waters Sep. 6, 1977

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