Liquid pump air release system
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United States of America Patent
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-
Jun 13, 1989
Issued Date -
N/A
app pub date -
Dec 15, 1986
filing date -
Oct 3, 1986
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Air entrained in a pumped liquid is released from a pumping chamber operated by a single piston and having an outlet passage controlled by a back-seating valve biased closed by a spring, when the piston near the end of its compression stroke causes positive mechanical engagement to open the outlet valve.
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