Apparatus and method for flow control
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United States of America Patent
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Mar 26, 1991
Issued Date -
N/A
app pub date -
Apr 12, 1989
filing date -
Jul 29, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention provides an apparatus and method for handling a solid/liquid mixture, for example for conveying fish immersed in a fish/water mixture. The apparatus has a receiving chamber to receive the mixture through an inlet valve thereof when the chamber is subjected to low pressure, and to discharge the mixture through an outlet valve thereof when pressure in the chamber is increased. A quantity sensor is responsive to a pre-determined quantity of mixture within the chamber to isolate the chamber from low pressure when the pre-determined quantity is reached. The inlet and outlet valves are responsive to pressure differences thereacross. The inlet valve is positioned adjacent an upper portion of the chamber above maxium upper level of mixture within the chamber and has seat clearing structure to clear the inlet valve of solids when flow therethrough ceases. Inlet and outlet flow sensors are responsive to flow through the inlet and outlet valves respectively. The quantity sensor also has a mode selector for selecting mode of operation of the apparatus to control pressure changes within the chamber.
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