Patent ID: 6354323
Filing Date: 2002-03-12
Classification: F16K,Y10T

Abstract:
An improved liquid level controller, comprising:a main housing having a plurality of walls which together define a normally enclosed interior, the main housing having a connector body located on an exterior surface of a selected sidewall of the main housing, the connector body being connectable to a sidewall of a liquid containing vessel for communicating with an interior of the vessel; a torque bar located within the main housing closed interior, the torque bar being pivotally mounted therein by means of a torque shaft attached at a pivot end of the torque bar and extending generally perpendicular thereto, the torque shaft being supported by inner and outer bearing assemblies, the inner bearing assembly being located within a selected sidewall of the main housing and the outer bearing assembly being located within a sidewall of the connector body; a displacement shaft having a first end connected to the torque shaft and extending perpendicular thereto, the displacement shaft having a second end which extends through a bore provided within the tubular connector body to a liquid displacement member for transmitting vertical forces responsive to changes in liquid level as a force tending to rotate the torque shaft; a lever pivotally mounted within the main housing interior; an adjustable connector member interconnecting the torque bar and lever for transmitting force exerted on the torque shaft to the lever; a biasing element located within the main housing interior and contacting the torque bar to thereby balance force exerted on the torque bar by the liquid displacement member acting on the torque shaft, wherein the biasing element is a coil spring located within the main housing interior and contacting a lower surface of the torque bar, the coil spring having a coil tension which is adjustable by means of an adjustment screw which is accessible from a located exterior of the main housing; a pilot assembly located in a pilot housing which is mounted on the main housing and exterior thereto, the pilot assembly being actuable by movement of the lever to provide a selectable output for controlling a variable and desired liquid level within the vessel interior.