Toilet flush apparatus

Claim 1

For use with a toilet tank of the type having a discharge outlet seat near the floor of the tank and a standpipe adjacent thereto, flush control apparatus, comprising: an inverted conical valve cup unrestrictedly open upward to a body of water in said tank, said cup being devoid of buoyancy and having an annular resilient wall intervening between its nose aNd its rim for engagement with said outlet seat to control discharge and retention of water from said tank whereby, when said tank is charged with water, a column thereof is borne by said valve cup and its annular resilient wall to press the same to said outlet seat; a lift stem having a threaded lower end; said valve cup having a threaded socket, axially located within the nose of said cup and adapted to receive said lift stem; a lift stem guide arm supported from said standpipe in spaced relation above said outlet seat and said valve cup; a spacer bushing about said lift stem between said valve cup and said guide arm operable to limit upward travel of said valve cup to a predetermined degree; a float fixed on said lift stem above said guide arm having sufficient buoyancy when said valve cup is displaced from said seat and said float is submerged to support said valve cup above said seat; and manually operable lifter means associated with the upper end of said lift stem for freeing said valve cup from said seat and to initiate the discharge of water from the toilet tank.