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Class Information
Number: 137/247.43
Name: Fluid handling > With liquid valves or liquid trap seals > Liquid seal in liquid flow line; flow liquid forms seal > U-seals > Topside access beneath cover plate closed floor opening
Description: Apparatus installed beneath a surface and having a top side access means located beneath an opening in the surface, the opening being provided with a removable cover plate.

Patents under this class:

Patent Number Title Of Patent Date Issued
8602051 Trap-primer system for floor drains Dec. 10, 2013
6311721 Residential drain line stop valve Nov. 6, 2001
4681131 Liquid closing device Jul. 21, 1987
4360041 Cleanout fitting Nov. 23, 1982
4275760 Trap-type drain with built-in strainer Jun. 30, 1981
4212314 Waste water outlet sanitary plant comprising a siphon Jul. 15, 1980

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