Water-saving device for use with toilets

A water-saving device for use in conjunction with a toilet bowl-tank assembly, which includes a tank having an outlet opening in the bottom thereof and means for replenishing water in the tank, comprising, in combination:

• lower float means adapted to removably seat over the opening in the bottom of a toilet tank;
• upper float means actuated upon flushing and adapted to float with the level of water in the toilet tank and contact the lower float means as the water level drops to a predetermined level in the toilet tank and thence force the lower float means to seat over the opening in the bottom of the toilet tank;
• locking means adapted to lock the upper float means in an immobile position out of contact with the lower float means when the toilet tank is filled with water;
• float control means in communication with the locking means and connected to the lower float means which, upon flushing the toilet, is adapted to unseat the lower float means from the outlet opening in the toilet tank to allow water to drain out, while causing the locking means to unlock the upper float means to thereby allow the upper float means to fall with the falling level of water in the toilet tank whereby when the water level has fallen to a predetermined level, the upper float means contacts and weighs against the lower float means forcing it downwardly and seat over the outlet opening in the toilet tank and thereby preventing the water level in the tank from dropping any further, and as the water level rises in the tank the upper float means floats upwardly with the rising water level until it contacts the locking means and is locked into its immobile position while the lower float means, through the force of water bearing against it and suction, remains seated over the outlet opening in the toilet tank.