Liquid dispensing system with sealing augering screw and method for dispensing
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United States of America Patent
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Oct 13, 1998
Grant Date -
N/A
app pub date -
Nov 22, 1995
filing date -
Nov 22, 1995
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A liquid dispenser has an augering screw that serves both a metering function and a valving function. The augering screw is axially movable between a position in which fluid can flow and a sealing position in which liquid flow through the nozzle is substantially prevented. The screw is preferably designed with a curved contour between the threads and with a plurality of thread-defining channels to allow liquid to fill more completely around the screw and to dispense more liquid with fewer screw turns than prior screw designs.
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Family
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Cited Art Landscape
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