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Class Information
Number: 405/94
Name: Hydraulic and earth engineering > Fluid control, treatment, or containment > Flow control > Water gate or adjustable weir > Condition responsive > To pressure on pivoted water gate
Description: Method or apparatus wherein a variation in the head of an accumulated body of liquid acting against a swinging water gate is effective to open or close the gate.










Sub-classes under this class:

Class Number Class Name Patents
405/95 With latch for closed position 6


Patents under this class:

Patent Number Title Of Patent Date Issued
8591149 Secured fusegate for flood control Nov. 26, 2013
8308396 Flood vent Nov. 13, 2012
7726907 Automatic trip gate Jun. 1, 2010
7497644 Automatic liquid barrier system Mar. 3, 2009
7467911 Storm drain basin gate system Dec. 23, 2008
7234894 Storm drain basin gate system Jun. 26, 2007
7114878 Irrigation gate system Oct. 3, 2006
6866444 Device installed at a ditch on a road, to prevent back flow of sewage and malodor Mar. 15, 2005
6779947 Gate systems and methods for regulating tidal flows Aug. 24, 2004
6719491 Fluid level control system Apr. 13, 2004
6663318 Fluid level control system Dec. 16, 2003
6623209 Automatic flood gate Sep. 23, 2003
6478954 Debris collecting apparatus Nov. 12, 2002
6390730 Protective elements, devices comprising said elements and method for protecting a zone against floods and avalanches May. 21, 2002
6287050 Foundation flood gate with ventilation Sep. 11, 2001
6171023 Water control gate Jan. 9, 2001
5944445 Device and method for relieving flooding from enclosed space Aug. 31, 1999
5882144 Device and method for triggering the destruction of a selected part of a hydraulic structure, such as a levee, a dike or a backfilled dam, and hydraulic structure comprising such a device Mar. 16, 1999
5472293 Multipurpose automatic gate control Dec. 5, 1995
5468090 Bending weir Nov. 21, 1995
5310284 Weak link prop for wicket dam May. 10, 1994
5222834 Collapsible safety prop for waterway dams Jun. 29, 1993
5195846 Spillway for discharging extraordinary floods at dams having at least two flood discharge structures Mar. 23, 1993
5125766 Mechanical automatic tilting weir with selfadjusting lowering of the weir-level during larger discharges Jun. 30, 1992
5061118 Overflow spillway for dams, weirs and similar structures Oct. 29, 1991
4787774 Fluid control apparatus Nov. 29, 1988
4753550 Apparatus for control of a liquid level, especially water level Jun. 28, 1988
4455106 Flash gate board Jun. 19, 1984
4349296 Irrigation ditch gate Sep. 14, 1982
4174913 Animal guard for field pipe Nov. 20, 1979
4133123 Utility bulletin board Jan. 9, 1979
4114381 Positive flow estuary structure Sep. 19, 1978
4073147 Water gate control system Feb. 14, 1978











 
 
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