Patent ID: 6123099
Filing Date: 2000-09-26
Classification: E03D,F16K,Y10T

Abstract:
A liquid level control apparatus for a flush tank containing liquid varying between highest and lowest levels and including a fill tube communicating with the tank and with a source of liquid under pressure, said apparatus comprising:a valve mechanism communicating with the fill tube and operable between open and closed conditions relative to the fill tube,a float disposed in the liquid in the tank for movement in response to changes in the liquid level in the tank,an actuator member coupled to said valve mechanism and to said float for actuating said valve mechanism between its open and closed conditions in response to movement of the float,and control mechanism including a first arresting portion contiguous with a wall portion of the float and a second arresting portion cooperatively associated with the float,said control mechanism being responsive to rising of the float to a predetermined stop level intermediate the highest and lowest levels for moving to a stop condition with said first arresting portion engaging said second arresting portion for mechanically arresting further upward movement of the float,said control mechanism, when in the stop condition, being responsive to a predetermined buoyancy force exerted on the arrested float when the liquid has risen substantially to the highest level for shifting to a release condition by disengagement of the first arresting portion from the second arresting portion for releasing the float and permitting the float and the actuator member to move suddenly to actuate the valve mechanism to its closed condition.