Patent ID: 8819874
Filing Date: 2014-09-02
Classification: E03D

Abstract:
1. A toilet tank flush valve structure, for use with a toilet tank that is provided with a water supply valve and has an interior space bounded by a floor formed with an outlet hole, the flush valve structure comprising: a valve base for installation in the outlet hole formed in the floor of the toilet tank, the valve base defining a water outflow passageway having an upper end and a lower end and including a first valve member at the upper end of the water outflow passage, a float assembly that is movable relative to the valve base between a sealing position in which a second valve member at a lower end of the float assembly engages the first valve member in sealing relationship and a flushing position in which the second valve member is spaced upwardly from the first valve member, the float assembly having an adjustable buoyancy configured to overcome the head pressure of water above it and float upwards once a flush has been initiated and defining a passageway extending upwardly therethrough, wherein the float assembly comprises: an overflow tube extending upward through the passageway defined by the float assembly, wherein the overflow tube extends upward from a lower end in fluid communication with the water outflow passageway of the valve base to an upper end in fluid communication with the interior space of the toilet tank and is adjustable in position relative to the float assembly independently of adjustment of the closure member relative to the outer shell, and a guide member that extends upward from the valve base through the overflow tube for guiding movement of the float assembly relative to the valve base, and wherein the guide member includes a stop element at a location above the float assembly for limiting upward travel of the float assembly from its sealing position, and the stop element is adjustably positioned relative to the valve base whereby a distance of said upward travel is selectively adjustable, and wherein the guide member defines a fluid passageway delivering water originating from the water supply valve to the valve base; wherein the guide member comprises: