Patent ID: 7673352

Claim:
A flush mechanism for a water closet, said flush mechanism comprising: a housing fixable to a toilet flush tank outlet; a float body, movable within said housing, for controlling water discharge though the tank outlet; valve means, disposed in said float body, for hydraulically assisting upward opening movement of the float body thereby reducing exterior operational force required to operate the float body, said valve means comprises an upper flush valve chamber and a moveable seat releaseably engaging a float seal, for releasing water from the upper flush valve chamber and into the tank outlet, the upper flush valve chamber, the seat, and the seal rising with said float body in order to discharge water though the tank outlet; a flow control chamber in fluid communication with said upper flush valve chamber though at least one hole; a cover for sealing said hole, said cover being connected to a buoyant counterweight; and an adjustable slide mechanism for controlling water flow through the hole and into said upper flush valve chamber to control downward movement of said float body and stop discharge of water though the tank outlet.