Fluid handling – Processes – Cleaning – repairing – or assembling
Patent
1994-12-19
1996-06-04
Walton, George L.
Fluid handling
Processes
Cleaning, repairing, or assembling
137315, 137426, 137443, 137445, 1376142, 137854, 141198, 251280, F16K 4300, F16K 3126, F16K 3300
Patent
active
055224156
ABSTRACT:
An automatic shut-off valve assembly for controlling the fill level in liquid storage tanks, sized to fit through existing filler pipes, includes a tubular body having a flow-blocking diverter plate on the lower end, a series of peripheral through-ports disposed upstream of the diverter plate and a concentric sleeve slidably mounted on the valve body and responsive to longitudinal forces transmitted through a pivotable linkage from a cantilevered float. The linkage permits the float to be extended downward along the valve axis for insertion into the tank, then to rotate outward into a cantilevered position. As the float rises in response to the buoyant force of the rising liquid, the sleeve is urged downward by the linkage to sealingly block the ports and limit flow of liquid through the valve. The tank fill level can be selected by adjusting lengths and angles of linkage members or by manipulating the angle and depth of the valve assembly in the tank.
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