Dual flush tank valve

Claim 1

A toilet flush tank valve assembly wherein a selective volume of water may be flushed into a toilet bowl comprising a flush tank, a discharge pipe having communication with a toilet bowl, a first conduit extending vertically upwardly from said discharge pipe into the interior of the flush tank and being offset therefrom and communicating therewith, a second conduiT extending vertically upwardly from said pipe, offset from said first conduit and said pipe and communicating with said pipe, said second conduit terminating closely adjacent the bottom of said tank, valve means seated on the open ends of said conduits, a series of pivoted link arms for optionally opening one or the other of said valves, said link arms positioned in horizontal planes, one below the other and each link arm having a free end, a shaft extending interiorly into said tank and connected at one end to a handle positioned exteriorly of said tank, a flat plate secured to said shaft and extending at right angles thereto, whereby the free ends of said links lie against the upper and lower faces of said plate respectively whereby upon movement of said plate in an upward direction, the upper link arms will actuate the valve on said second conduit to flush a full tank of water and when the plate is shifted downwardly, it will actuate the valve on said first conduit to flush a half tank of water, and handle means to operate said plate.