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Class Information
Number: 137/247.19
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 > Pivoted valve
Description: Apparatus in which the valve is pivoted.

Patents under this class:

Patent Number Title Of Patent Date Issued
6543470 Flexible trap for drains Apr. 8, 2003
6279601 Liquid zone seal Aug. 28, 2001
4555820 Drain pipe system Dec. 3, 1985
4215716 One-way conduit closure Aug. 5, 1980
4074686 Manually closable anti-backup trap Feb. 21, 1978

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