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| Number | Title | Issue Date |
| 7229234 | Method for preventing and discharging flood This invention discloses a simple and convenient method of floods control and with great discharge capacity. This invention is a method of speeding up the river floods water discharge ability into the sea by means of the natural tidal range. This is done by the foll... | 06/12/2007 |
| 7044165 | Outflow regulator for a gravity-fed liquid outlet An outflow regulator for a gravity-fed liquid outlet of a liquid reservoir comprising a restriction plate mountable within the liquid outlet for limiting a flow rate of an effluent. The restriction plate allows a lower passage for the effluent when a first level of ... | 05/16/2006 |
| 6719491 | Fluid level control system A fluid level control system, particularly useful for controlling the level of water flowing in an open channel. The fluid level control system includes a gate having a flap portion interconnected to a lever portion. The flap portion is rotatable about a first pivot... | 04/13/2004 |
| 6171023 | Water control gate A water control gate assembly comprises a self-actuating top-hung gate for controlling the flow of water in a waterway. The gate is pivotably mounted on a pair of piers located above an upstream of the gate for allowing the gate to pivot between a closed ... | 01/09/2001 |
| 4963057 | Sluice gate for automatically regulating a level The gate of the present invention regulates the level of a downstream reach (4) by means of a sector-shaped plate (1) carried by a frame (6, 7) that oscillates about a axis (5) and that also carries a float (8) dipping into said reach. Substantially neutr... | 10/16/1990 |
| 4449851 | Energy-efficient automatic sluice gate for sustaining a fluid level An energy-efficient automatic sluice gate for sustaining a fluid level, separating an upstream pool from a downstream pool in an irrigation system and enabling the level of water in one of the pools to be kept constant at a settable value. A sluice gate s... | 05/22/1984 |
| 4242009 | Apparatus for automatically and selectively discharging saline water An apparatus for automatically and selectively discharging saline water at a tide-preventing floodgate between the ocean and a river or like which comprises a tide-preventing floodgate provided between the ocean and a river or the like, a drainpipe for di... | 12/30/1980 |
