Metallic stem seal with inclined channel and integral support member
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United States of America Patent
Stats
-
Nov 26, 1996
Grant Date -
N/A
app pub date -
Jun 6, 1995
filing date -
Mar 21, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A valve stem seal comprising a cylindrical stem-sealing membrane and a membrane supporting flange. The membrane has a corrugated profile which defines one or more loop-shaped channels bounded by contact surfaces on a radially inner face and each channel is inclined at 5.degree.-10.degree. with respect to a plane perpendicular to the longitudinal axis. The channels form a labyrinth seal for any fluid leaking along the outer surface of the stem. A support bearing for the stem is provided on the membrane supporting flange.
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Cited Art Landscape
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