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Class Information
Number: 137/397
Name: Fluid handling > Liquid level responsive or maintaining systems > Control of outflow from tank > Self-emptying tanks > By float
Description: Apparatus in which the means sensing the liquid level floats in the liquid and is buoyed up thereby.

Patents under this class:

Patent Number Title Of Patent Date Issued
8561842 Valve apparatus for selectively dispensing liquid from a plurality of sources Oct. 22, 2013
8522811 Auto flow steam trap Sep. 3, 2013
8443832 Sequencer assembly, system and method May. 21, 2013
8186376 Liquid purge valve May. 29, 2012
8137541 Sewage effluent distribution means Mar. 20, 2012
7814930 Refill control mechanism for a liquid holding tank Oct. 19, 2010
6886588 Buoyancy flushing apparatus and method thereof May. 3, 2005
6712944 Gas/liquid phase separator for electrolysis cell Mar. 30, 2004
6640828 Flushing apparatus and method thereof Nov. 4, 2003
6526700 High pressure downspout Mar. 4, 2003
6195013 Fluid level sensor Feb. 27, 2001
6131605 Automatic drain for freight container Oct. 17, 2000
6012481 Constant-level fluid supplier Jan. 11, 2000
6003542 Automatic shutoff valve Dec. 21, 1999
5857472 Device for rinsing a fluid-storage space Jan. 12, 1999
5799504 Refrigerator system with float valve flow control Sep. 1, 1998
5548944 Vacuum operated processing station having a liquid separating system Aug. 27, 1996
5417078 Refrigerator flow control apparatus May. 23, 1995
5381956 Self activating falling water display Jan. 17, 1995
5291620 Push button toilet flush mechanism Mar. 8, 1994
5239285 Low salt level sensor Aug. 24, 1993
5201340 Automatic drainage device for cargo containers Apr. 13, 1993
5040247 Water closet metering device Aug. 20, 1991
4986206 Bilge drain valve Jan. 22, 1991
4823827 Float system for accumulator Apr. 25, 1989
4800907 Storage space for liquids, with a flushing device Jan. 31, 1989
4800839 Developing device for electrophotographic color copier Jan. 31, 1989
4781894 Control mechanism for delivery of gas product at constant pressure Nov. 1, 1988
4601071 Flush system Jul. 22, 1986
4573489 Dump valve Mar. 4, 1986
4505288 Pneumatically controlled dump valve system for gas scrubbers Mar. 19, 1985
4304528 Passive solar powered plant watering system Dec. 8, 1981
4301827 Accumulator with preclosing preventer Nov. 24, 1981
4294288 Accumulator with float orienting means Oct. 13, 1981
4291836 Intermittent water-supply system Sep. 29, 1981
4225434 Storm overflow basin Sep. 30, 1980
4083147 Automated planter box system Apr. 11, 1978

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