Patent ID: 6094753
Filing Date: 2000-08-01
Classification: E03D

Abstract:
A flush valve for use on a tank, the flush valve comprising:a valve ring defining a downwardly open valve port;an overflow tube centered on an upright axis and having a lower end opening into the valve port and seatable on the port, the tube being displaceable relative to the port between a lower closed position blocking the port and an upper open position freeing the port;means including a mechanism inside the tube for lifting the tube into the open position and for thereby allowing water in the tank to move down and out through the port;a lower float vertically fixed in the tank and displaceable between a latching position and a releasing position, the lower float being constructed such that when submerged it normally assumes the latching position;means including a latch on the lower float engageable with the tube for holding the tube in the open position while the lower float is in the latching position and for releasing the tube for movement into the closed position and ending of a flushing cycle when the lower float is in the releasing position;an upper float in the tank above the lower float;actuating means on the upper float engageable with the lower float for displacing same into the releasing position on downward displacement of the upper float toward the lower float;link means displaceable between a coupling position preventing downward movement of the upper float and a decoupling position allowing the upper float to move downward; andmeans including a partial-flush actuating element effective on the link means for displacing same between the coupling and decoupling positions, whereby in the decoupling position downward floating of the upper float will displace the lower float into the releasing position and prematurely end a flushing cycle.