| abstract |
Covers a water control valve for a water tank which is associated with a conventional toilet bowl. The water control valve includes a valve structure mounted on a vertical water inlet pipe and a float structure which moves vertically along the inlet pipe to control the valve structure. The float structure includes two cup-shaped elements, one positioned vertically above the other, both moving along the inlet pipe in response to any change in the water level within the water tank. The valve structure includes a flexible diaphragm which is normally positioned upon a seat at the upper opening of the inlet pipe and blocks the flow of water into the tank, and a pilot valve to control the movement of the flexible diaphragm. The pilot valve is mechanically coupled to the float structure so that, as the float structure descends toward the bottom of the tank, the pilot valve will be opened and, in turn, allow the diaphragm to be flexed upwardly to allow the entry of water into the tank. When the float structure reaches an upper predetermined position, the pilot valve will be closed and the diaphragm will be returned to its normal position to block the flow of water into the flush tank. |