Dual action toilet flush mechanism

Abstract

A water supply tank apparatus comprises a tank adapted for receiving and storing water; a drain pipe adapted for draining the water from the tank; a fill pipe adapted for filling the tank; a drain shutter adapted for enabling and disabling the draining device; a water level sensor providing a shutter closer adapted for closing the drain shutter at a selectively adjustable low water level; a device for disabling water filling at a selected high water level; and a lever and chain arrangement for opening the drain shutter thereby enabling draining of the tank.

What is claimed is:  
     
         1 . A water supply tank apparatus comprising a tank adapted for receiving and storing water; a draining means adapted for draining the water from the tank; a water filling means adapted for filling the tank; a drain shuttering means adapted for enabling and disabling the draining means; a water level sensing means providing a shutter closing means adapted for closing the drain shuttering means  40  at a selectively adjustable low water level; a means for disabling the water filling means at a selected high water level; and a means for opening of the drain shuttering means thereby enabling the draining means for draining the tank.  
     
     
         2 . The apparatus of  claim 1  wherein the water level sensing means is a water head pressure sensing means adapted upon sensing a selected water head pressure.  
     
     
         3 . The apparatus of  claim 1  wherein the water level sensing means controls a shut-off valve through a mechanical linkage.  
     
     
         4 . The apparatus of  claim 1  wherein the water level sensing means is a hollow float providing means for inserting ballast therewithin.