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Class Information
Number: 137/399
Name: Fluid handling > Liquid level responsive or maintaining systems > Control of outflow from tank > By float > Low level safety cut-off
Description: Apparatus wherein the outflow is closed in response to the presence of a low level in the liquid accumulation.










Patents under this class:
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Patent Number Title Of Patent Date Issued
RE42771 Method of operation of a device for energy conversion using a main fuel and at least one auxiliary fuel Oct. 4, 2011
7370665 Tanks May. 13, 2008
7357149 Auxiliary fuel tank systems for aircraft and methods for their manufacture and use Apr. 15, 2008
7296590 Liquid suction device Nov. 20, 2007
7207318 Method for operation of a device for energy conversion using a main fuel and at least one auxiliary fuel Apr. 24, 2007
6886588 Buoyancy flushing apparatus and method thereof May. 3, 2005
6695004 Magnetic automatic stop valve Feb. 24, 2004
6588449 Diesel fuel shut-off device Jul. 8, 2003
6305405 Valve for a tank and especially for a flow control arrangement having a plurality of fluid storage tanks Oct. 23, 2001
6058964 Multi-level fuel pickup May. 9, 2000
6017332 Medical dye delivery system Jan. 25, 2000
6003542 Automatic shutoff valve Dec. 21, 1999
5942105 Float actuated water control valve Aug. 24, 1999
5692643 Flow passage closing mechanism of a beverage pouring apparatus Dec. 2, 1997
5615802 Flow passage closing mechanism of beverage pouring apparatus Apr. 1, 1997
5593596 System and method for collecting cutting fluid liquid and chips Jan. 14, 1997
5493086 Monitoring and regulating device for a fluid such as engine oil Feb. 20, 1996
5466380 Sump system and method for collecting liquid to be filtered Nov. 14, 1995
5447175 Fuel delivery device of fuel tank Sep. 5, 1995
5423346 Fluid container shut off valve Jun. 13, 1995
5415325 Dropper-controller with an automatically sealing means May. 16, 1995
5365970 Gravity flow chemigation system and low level shutoff valve Nov. 22, 1994
5366349 Automatic liquid pump with vapor flow prevention flow outlet valve Nov. 22, 1994
5318407 Check valve having internal float Jun. 7, 1994
5249594 In-tank fuel supply system and method of installation Oct. 5, 1993
5236000 In-tank fuel supply system and method of installation Aug. 17, 1993
5186203 Free float steam trap Feb. 16, 1993
5009079 Refrigerant flow control device Apr. 23, 1991
4994055 Fluid flow control apparatus Feb. 19, 1991
4883086 Aspiration chemical supply apparatus and method Nov. 28, 1989
4870987 Relating to a flow regulator for intravenous injection device Oct. 3, 1989
4830040 Automatic swimming pool cover drainer May. 16, 1989
4807582 Reserve fuel shut-off valve Feb. 28, 1989
4799504 Tank constructions for containing fuel, and water separators for fuel feed systems Jan. 24, 1989
4731060 Hydrostatic float valve and intravenous system supplied therewith Mar. 15, 1988
4715345 Automatic fuel shut off system for fuel-injected engines Dec. 29, 1987
4678001 Pump prime maintainer Jul. 7, 1987
4640306 Fluid flow regulator for intravenous feeding device Feb. 3, 1987
4624278 Flow regulating device Nov. 25, 1986
4605038 Float valve control Aug. 12, 1986
4535800 Valve system for vacuum sewage collection system Aug. 20, 1985
4449976 Device for preserving continuity of intravenous flow May. 22, 1984
4407642 Fuel supply unit Oct. 4, 1983
4396016 Intravenous solution flow regulator Aug. 2, 1983
4313566 Fluid balancing system for tank vehicle Feb. 2, 1982
4278105 Spherical accumulator with buoyant float Jul. 14, 1981
4175558 Apparatus for administering parenteral liquid in sequential units provided with a ball valve float Nov. 27, 1979
4173222 Apparatus for controllably administering a parenteral fluid Nov. 6, 1979
4119016 Hydraulic control device Oct. 10, 1978
4078563 Disc valve in a container for dispensing liquids Mar. 14, 1978

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