Importance

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Abstract

A liquid level control apparatus for a flush tank includes an upstanding fill tube integral at its upper end with a valve housing carrying a flexible resilient pinch tube valve member and a pivoting actuator engageable with the pinch tube for opening and closing the valve. The valve housing is fixed to a head member defining a conduit which communicates with a downwardly extending tube parallel to the fill tube. A float has cylindrical portions respectively receiving the fill tube and the downwardly extending tube therethrough so that the float can slide upwardly and downwardly along the tubes as the water level in the tank varies. The actuator is pivotally connected to a linkage which extends outwardly through an aperture in the float and is pivotally connected to the float externally thereof. In one embodiment the aperture defines cam surfaces which engage the linkage to operate the actuator. In another embodiment the float carries a control mechanism including a cam slot engageable with a cam follower roller on the linkage for arresting upward movement of the float until the tank is full to provide a snap-action shutoff of the valve.

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First Claim