Vented metering pump
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United States of America Patent
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-
Feb 16, 1999
Grant Date -
N/A
app pub date -
May 9, 1997
filing date -
Nov 9, 1994
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A pump for metering liquids out of a tank into a delivery line, includes, fitted on the output side, an air-purge device which is designed to separate off gas, in particular air, entrained by the pressurized liquid being conveyed and to lead the gas away into a gas-collection space which is at a pressure lower than that of the liquid. In order to ensure reliable purging, even with corrosive liquids, the pump is designed so that the purging device has a semipermeable membrane, on one side of which the pressurized liquid acts, the other side being in direct contact with the gas-collection space.
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