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Class Information
Number: 405/87
Name: Hydraulic and earth engineering > Fluid control, treatment, or containment > Flow control > Water gate or adjustable weir
Description: Method or apparatus relating to movable regulators which control the volume of water flowing through an open channel.










Sub-classes under this class:

Class Number Class Name Patents
405/88 Center flow 5
405/92 Condition responsive 61
405/90 Removable 32
405/98 Roller or flexible 2
405/103 Sliding 22
405/99 Swinging 22
405/89 Uniform discharge 2


Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8602686 Undershot sluice gate Dec. 10, 2013
8590560 Opening/closing device Nov. 26, 2013
8511938 Flood flaps vent for sealed crawlspace Aug. 20, 2013
8511939 Self-actuating storm surge barrier Aug. 20, 2013
8408841 Flow resistance modifier apparatuses and methods for moving fluids Apr. 2, 2013
8366348 Raised state holding mechanism of flap gate for breakwater Feb. 5, 2013
8292542 Undershot sluice gate Oct. 23, 2012
8240951 Diverting storm surge-apparatus and method Aug. 14, 2012
8033753 Automatic flooding protection for underground ventilation ducts Oct. 11, 2011
7815397 Expansion-sealed flood control gate Oct. 19, 2010
7744310 Hydrostatically operated variable height bulkhead Jun. 29, 2010
7461999 Flow measurement and control Dec. 9, 2008
7422392 Water control structure Sep. 9, 2008
7410325 Modular guide frame for a gate Aug. 12, 2008
7229234 Method for preventing and discharging flood Jun. 12, 2007
7114878 Irrigation gate system Oct. 3, 2006
7114879 Water control gate and actuator therefore Oct. 3, 2006
7037039 Method and apparatus for an improved lock and dam assembly May. 2, 2006
7033112 Water-retaining structure Apr. 25, 2006
6772789 Flow leveling device Aug. 10, 2004
6755591 Liquid flow controller device Jun. 29, 2004
6732479 Movable defensive apparatus May. 11, 2004
6719491 Fluid level control system Apr. 13, 2004
6663318 Fluid level control system Dec. 16, 2003
6634829 Fitting structural body, fitting and flexible sheet inflatable gate Oct. 21, 2003
6582156 Level control device for wetlands wastewater treatment facilities Jun. 24, 2003
6554535 System for protecting coastal land from rise of surface of the sea Apr. 29, 2003
6540437 End dam assembly for drainage channel Apr. 1, 2003
6490506 Method and apparatus for monitoring hydroelectric facility maintenance and environmental costs Dec. 3, 2002
6478954 Debris collecting apparatus Nov. 12, 2002
6467998 Self-regulating weirs and fishways Oct. 22, 2002
6425707 Flood protection device for closing opening in wall against floodwater Jul. 30, 2002
6409427 Soil erosion collector Jun. 25, 2002
6354762 Mounting member and flexible membrane dam Mar. 12, 2002
6338594 Movable barrier wall Jan. 15, 2002
6287050 Foundation flood gate with ventilation Sep. 11, 2001
6287051 Fixable seal sluice gate Sep. 11, 2001
6283673 Method of protecting coastal land from rise of surface of the sea Sep. 4, 2001
6273639 Method and apparatus for facilitating migration of fish past dams and other barriers in waterways Aug. 14, 2001
6269287 Method and apparatus for monitoring a hydroelectric facility trash rack and optimizing performance Jul. 31, 2001
6213684 Telescoping weir Apr. 10, 2001
6196762 Non-clogging debris and sediment removal facility Mar. 6, 2001
6196764 Automatic wicket for a hydraulic structure Mar. 6, 2001
6171023 Water control gate Jan. 9, 2001
6164869 Device for influencing a flow of waste water Dec. 26, 2000
6019898 Weir assembly with movable baffle member Feb. 1, 2000
5944445 Device and method for relieving flooding from enclosed space Aug. 31, 1999
5895579 Adjustable inlet for waste water treatment apparatus Apr. 20, 1999
5795467 Adjustable inlet for waste water treatment apparatus Aug. 18, 1998
5788410 Mobile underflow spill recovery unit Aug. 4, 1998

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