Drain valve operating device for a cistern of flush toilet

Claim 1

A drain valve operating device for a cistern of a flush toilet which has a hollow tank body, a lid on the top of said body, and a drain in the bottom of said body, said device comprising: a rotatable spindle means mounted through the sidewall of said tank body; an operating lever means with a weight at its free end connected to said spindle outside of said tank body; a drain valve over said drain for opening and closing said drain; a chain connected at one end to said drain valve; and an L-shaped operating rod means connected at one end which is parallel to the axis of said spindle means, to said spindle inside said tank body and connected at its opposite end to said chain, said operating rod means being positioned near said lid so that rotating said spindle means in one direction causes said operating rod means to abutt said lid, and said lever means being rotatable away from the direction of contacting said lid so that said chain connected between said rod and said drain valve is pulled away from said drain valve at an angle different than the opening direction of said drain valve.