Title: Apparatus employing a three port chamber and two selectively operable valves for controlling the quantity of water flushed by a toilet

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Abstract: An improved apparatus for controlling the quantity of water flowing through a water outlet in a toilet tank comprising a rotatable shaft having opposed first and second ends disposed through an opening in the front wall of the toilet tank, a crank mounted to the tank, connected to the first end and being capable of rotating the shaft through first and second angles when a force is applied to it, an arm connected to the second end, a box-like structure forming a chamber disposed in the tank and including first and second upwardly extending tubes forming first and second ports, respectively, an upwardly extending overflow tube, and a third port arranged to discharge water through the water outlet, the first tube having an axial dimension that is greater than the second tube, a first flapper valve hingedly connected to the overflow tube and being normally seated on the first port, the first valve being movable from a normally closed position to an open position, a second valve hingedly connected to the overflow tube and being normally seated on the second port, the second valve being movable from a normally closed position to an open position.


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