Magnetically controlled liquid transfer system
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United States of America Patent
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Aug 17, 1999
Grant Date -
N/A
app pub date -
Sep 12, 1997
filing date -
Jun 12, 1995
priority date (Note) -
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Abstract
A compressed air-actuated pump includes a venturi nozzle (24) to create a vacuum condition within a fluid-tight pump body or chamber (8) to pump in a liquid or slurry from a remote location. When a given level of liquid is pumped in, a float mechanism (69, 97, 101) actuates a magnetic air valve (60) which actuates a diverter valve (40) whereby the pressurized air from the venturi nozzle is diverted into the pump body to create a pressurized condition therein, whereby the liquid or slurry previously accumulated therein is pumped out. The magnetic actuated valve and diverter valve controlled thereby insures that the desired amount of liquid or slurry is always discharged from the pump chamber during each pressure cycle, and drawn into the chamber during the suction or fill cycle. In a second embodiment, liquid flows into the pump chamber under the influence of gravity and an air-actuated ON/OFF switch (116), which is controlled by the magnetic air valve, regulates the flow of pressurized air into the pump chamber to force the liquid therefrom upon the liquid reaching an upper fill level.
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