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Class Information
Number: 405/96
Name: Hydraulic and earth engineering > Fluid control, treatment, or containment > Flow control > Water gate or adjustable weir > Condition responsive > Float
Description: Method or apparatus wherein a buoyant member is employed to sense the height of an accumulated liquid.










Sub-classes under this class:

Class Number Class Name Patents
405/97 Having separate float chamber 4


Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8590560 Opening/closing device Nov. 26, 2013
8591148 Multi-rate flow control system for a detention pond Nov. 26, 2013
8585321 Flow control system for a detention pond Nov. 19, 2013
8578961 Low profile backwater valve Nov. 12, 2013
8511939 Self-actuating storm surge barrier Aug. 20, 2013
8499785 Overflow valve for prevention of water vapor loss Aug. 6, 2013
8240951 Diverting storm surge-apparatus and method Aug. 14, 2012
8043026 Flow control system for a detention pond with tapered plunger Oct. 25, 2011
8033753 Automatic flooding protection for underground ventilation ducts Oct. 11, 2011
7985035 Flow control system for a detention pond Jul. 26, 2011
7942606 Groundwater control system with automatic water flow regulator May. 17, 2011
7922422 Low profile buoyancy adjustment controller and valve system for diver's vest Apr. 12, 2011
7762741 Flow control system for a detention pond Jul. 27, 2010
7744310 Hydrostatically operated variable height bulkhead Jun. 29, 2010
7658572 Tide apparatus and tide structure Feb. 9, 2010
7600944 Flood vent Oct. 13, 2009
7497644 Automatic liquid barrier system Mar. 3, 2009
7429147 Anti-flooding device for the exploitation of water energy Sep. 30, 2008
7299822 Liquid level regulation apparatus Nov. 27, 2007
7270498 Flood vent Sep. 18, 2007
7125200 Flow control system for a holding pond Oct. 24, 2006
6997644 Passive method for obtaining controlled drainage from a vessel Feb. 14, 2006
6988853 Muted tidal regulator Jan. 24, 2006
6779947 Gate systems and methods for regulating tidal flows Aug. 24, 2004
6692187 Flood gate for door Feb. 17, 2004
6485231 Foundation flood gate with ventilation Nov. 26, 2002
6478954 Debris collecting apparatus Nov. 12, 2002
6474361 Floating weir assembly and fluid flow management system comprising same Nov. 5, 2002
6453483 Spa weir system Sep. 24, 2002
6425707 Flood protection device for closing opening in wall against floodwater Jul. 30, 2002
6318404 Backflow valve Nov. 20, 2001
6305411 Normally-open backwater valve Oct. 23, 2001
5725326 Movable dam Mar. 10, 1998
5642534 Spa weir gate Jul. 1, 1997
5462075 Method and device for controlling a flow of fluid Oct. 31, 1995
5460462 Liquid and flood water barrier wall forming-apparatus Oct. 24, 1995
5125766 Mechanical automatic tilting weir with selfadjusting lowering of the weir-level during larger discharges Jun. 30, 1992
5020567 Drainage valve having a flexible flap with an edge taper Jun. 4, 1991
4478534 Flood control system Oct. 23, 1984
4449851 Energy-efficient automatic sluice gate for sustaining a fluid level May. 22, 1984
4431340 Fish elevator and method of elevating fish Feb. 14, 1984
4324506 Self-regulating fluid control valves Apr. 13, 1982
4229119 Liftable and collapsible barrage Oct. 21, 1980
4225434 Storm overflow basin Sep. 30, 1980
4146937 Perimeter skimming gutter with fluid level-responsive weir closure for weir skimming flow control Apr. 3, 1979
4146346 Apparatus and method for controlling tide waters Mar. 27, 1979
4103496 Collapsible and expansible barrage Aug. 1, 1978
4103497 Manoeuvrable weir Aug. 1, 1978
4091624 Self-regulating fluid control valve May. 30, 1978
3952522 Irrigation systems automation Apr. 27, 1976

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