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Class Information
Number: 137/415
Name: Fluid handling > Liquid level responsive or maintaining systems > By float controlled valve > Servo relay operation of control > Fluid pressure > From tank
Description: Apparatus in which the source of fluid pressure is the tank holding the liquid accumulation to the level of which the float responds.










Patents under this class:

Patent Number Title Of Patent Date Issued
8622072 Apparatus to control fluid flow Jan. 7, 2014
8596293 Water appliance having a flow control unit and a filter assembly Dec. 3, 2013
8091580 Pilot switch Jan. 10, 2012
7392822 Liquid level controller and pilot switch Jul. 1, 2008
6729367 Overflow prevention system and method using laminar-to-turbulent flow transition May. 4, 2004
6588449 Diesel fuel shut-off device Jul. 8, 2003
6354323 Liquid level controller Mar. 12, 2002
6178985 Automatic drain system Jan. 30, 2001
6079438 Valve device for controlling the filling level of cylinders and the like with liquefied gases Jun. 27, 2000
5992448 Liquid level controller Nov. 30, 1999
5842500 Overfill preventing valve Dec. 1, 1998
5832953 Overfill shut-off system for liquid storage tanks Nov. 10, 1998
5813432 Automatic shut-off valve arrangement Sep. 29, 1998
5121767 Automatic drain valve Jun. 16, 1992
5103855 Automatic condensate draining device for compressed air systems Apr. 14, 1992
4703784 Dual operation tank filling fitting with automatic shut-off Nov. 3, 1987
4488571 Flow-control system with pressure-responsive valve Dec. 18, 1984
4458714 Flow regulating device Jul. 10, 1984
4444230 Tank-mounted filling device Apr. 24, 1984
4390037 Gas regulation device for gas actuated valves Jun. 28, 1983
4305422 Filler valve for a gas tank Dec. 15, 1981
4275755 Steam trap Jun. 30, 1981
4011884 Liquid-level valving device particularly useful as automatic relief valve Mar. 15, 1977
3993090 Automatic valving device Nov. 23, 1976











 
 
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