Nitrogen die cylinder
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United States of America Patent
Stats
-
Dec 16, 1986
Grant Date -
N/A
app pub date -
Jun 14, 1984
filing date -
Jun 14, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A nitrogen die piston-cylinder unit has a central post threaded at one end into a nitrogen manifold. The piston has an axial bore therethrough. A sleeve closed at one end is telescoped over the free end of the post and is vertically slideable thereon. The upper end of the post has an annular seal thereon in sliding sealed engagement with the bore of the sleeve. A key and keyway formed on the inside of the sleeve and the outside of the post are arranged to interengage when the sleeve is fully telescoped over the post to prevent relative rotation therebetween. The exposed end face of the sleeve is formed with recesses adapted to be engaged by a spanner wrench to enable the unit to be removed from the threaded port of the manifold when the key is engaged with the keyway.
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