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Class Information
Number: 137/420
Name: Fluid handling > Liquid level responsive or maintaining systems > By float controlled valve > Quick acting > Trip mechanism
Description: Apparatus in which the flow control means is provided with a biasing means urging it in one direction which means is restrained by a latch or similar element, which latch is released by means of the float.

Sub-classes under this class:

Class Number Class Name Patents
137/421 Weight or spring bias 24

Patents under this class:

Patent Number Title Of Patent Date Issued
7665482 Float control fluid shut off valve mechanism Feb. 23, 2010
7644723 Transmix prevention lock Jan. 12, 2010
6837256 Filler tube mounted fuel tank refueling valve Jan. 4, 2005
6808370 Gas pressure driven tank fluid pump having float and snap-acting rotary valve Oct. 26, 2004
6499503 Backflow valve Dec. 31, 2002
6446665 Backwater valve Sep. 10, 2002
6318404 Backflow valve Nov. 20, 2001
5518024 Overfill prevention device for storage tanks May. 21, 1996
5442820 Toilet tank flushing mechanism Aug. 22, 1995
5031250 Mechanism for filling and discharging a toilet water tank Jul. 16, 1991
4965891 Safety latch for a toilet tank valve Oct. 30, 1990
4791689 Mechanism for filling and discharging a toilet tank Dec. 20, 1988

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