Method of and apparatus for purging an annular bayonet
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United States of America Patent
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-
Apr 10, 1990
Grant Date -
N/A
app pub date -
Aug 3, 1987
filing date -
Aug 3, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An annular bayonet vacuum cup allows a vacuum to be pulled on an annular bayonet and the bayonet to be filled with propellant that is devoid of air. The vacuum cup is transparent/translucent and allows the propellant to be seen as it leaves the exit end of the bayonet. This alerts an operator to cut off the vacuum pressure thereby to keep the excess of propellant flow to a minimum, which excess drops into the vacuum cup and is prevented from contaminating the vacuum line. The vacuum cup is disposable (an O-ring sealing ring being reusable) and eliminates propellant clean-up.
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