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Class Information
Number: 137/428
Name: Fluid handling > Liquid level responsive or maintaining systems > By float controlled valve > In separate communicating float chamber
Description: Apparatus where the float is in a chamber separate from the holder for the liquid accumulation, but which chamber is connected therewith so that the variation in liquid level in the chamber corresponds to that in the holder.










Patents under this class:
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Patent Number Title Of Patent Date Issued
8596293 Water appliance having a flow control unit and a filter assembly Dec. 3, 2013
8443832 Sequencer assembly, system and method May. 21, 2013
8220482 Devices, methods, and algorithms for rapid measurement of mean surface level change of liquids in containers Jul. 17, 2012
8033292 Heated humidified chamber with autofeed mechanism Oct. 11, 2011
7934517 Water level control system May. 3, 2011
7325565 Backflow valve Feb. 5, 2008
7059342 Liquid shut-off system Jun. 13, 2006
7007319 Overflow device for bathtub Mar. 7, 2006
7003817 Tank with automatic fill and overfill drain Feb. 28, 2006
6895990 Water heater fail safe apparatus May. 24, 2005
6732388 Overflow system May. 11, 2004
6332475 Filling stop valve Dec. 25, 2001
6276200 Liquid level controller Aug. 21, 2001
6263906 Overflow proof fluid level controller Jul. 24, 2001
6260574 Toilet tank fill valve connectable to riser with pre-selected height Jul. 17, 2001
6202677 Multi-functional cleaning and filtering system for aquarium tank Mar. 20, 2001
6142174 Fill valve float arm connection Nov. 7, 2000
6129836 Two-chamber fluid control valve and water softener incorporating same Oct. 10, 2000
6095206 Automatic liquid filling device and method of filling to a predetermined level Aug. 1, 2000
6035879 Automatic fill valve assembly Mar. 14, 2000
6003541 Unitary float and arm for float operated valve Dec. 21, 1999
6000425 Automatic remote fluid level controller Dec. 14, 1999
5954082 Apparatus and method for calibrating float valve Sep. 21, 1999
5950692 Arrangement for limiting the fill level of a fuel tank Sep. 14, 1999
5920920 Straight trap toilet apparatus Jul. 13, 1999
5887614 Overfill prevention device for storage tanks Mar. 30, 1999
5868154 Propane supply system with secondary containment tank Feb. 9, 1999
5839466 Automatic watering device Nov. 24, 1998
5836346 Pilot operated diaphragm fill valve Nov. 17, 1998
5790991 Apparatus for automatically regulating water level in a swimming pool Aug. 11, 1998
5755257 Retention gate May. 26, 1998
5661855 Reservoir fill valve control for toilet storage tanks Sep. 2, 1997
5518024 Overfill prevention device for storage tanks May. 21, 1996
5421038 Refilling preventing system for a toilet tank Jun. 6, 1995
5367723 Valve for regulating water level in a swimming pool Nov. 29, 1994
5365617 Retrofit swimming pool water leveler and method Nov. 22, 1994
5285533 Anti-leakage apparatus for containers for liquid Feb. 15, 1994
5271808 Apparatus from waste oil for reclaiming a useful oil product Dec. 21, 1993
5255703 Float operated fill valve Oct. 26, 1993
5203367 Apparatus for supplying liquid under constant pressure Apr. 20, 1993
5176167 Control valve Jan. 5, 1993
5103859 Float chamber Apr. 14, 1992
4947888 Toxic fluid and vapor handling apparatus Aug. 14, 1990
4903724 Liquid level control system Feb. 27, 1990
4868933 Flush control devices Sep. 26, 1989
4865073 Liquid level control for refrigeration system Sep. 12, 1989
4836239 Water cooling tower and water level control system therefor Jun. 6, 1989
4769217 Apparatus for measuring content of organic carbon Sep. 6, 1988
4754779 Central circulator and mixer for fountain solution for printing presses Jul. 5, 1988
4735230 Overflow valve system Apr. 5, 1988

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