Liquid dispenser

Abstract

Abstract A liquid dispenser, adapted to rest upon the bottom of a flush tank, includes a container having a quantity of the concentrated soluble material therein, and a closure forming a piston extending into the top opening of the container. The closure forms a liquid flow passage between the interior and exterior of the container and is adapted for shifting in response to the flush/fill modes of the tank cycle. The closure rises to its upper limit by flotation from entrapped air within the closure, retains liquid in an open cavity thereof and becomes fully submerged by the rising level of the tank liquid. As the closure rises, tank liquid enters the container through the flow passage for mixing with the chemical concentrate. During the flush mode of the tank, the closure falls by gravity and is augmented by the retained water in its cavity as the receding level of the tank liquid passes below the upper rim of the closure. As the closure falls it effects a positively controlled piston-displacement discharge of liquid chemical concentrate from the interior of the container into the outflowing tank liquid only at the end of the flush cycle. The piston is formed by a bottom wall of an inner depending wall of the closure, or by an air cushion defined by such inner wall, so as to effect a piston-displacement discharge of the chemical concentrate from the interior to the exterior of the container at the end of the flush cycle. The length of the displacement stroke may be varied to adjust the concentration of the treatment by varying the amount dispensed during each cycle. And, an upper reservoir may be formed on the closure in communication through discharge ports with the flow passage for purging the passage of liquid concentrate during the flush cycle.

Inventors

• 👤 Douglas F. Corsette

Bibliographic Details