Mechanical plug for vessel penetration and method therefor
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United States of America Patent
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-
Oct 7, 1997
Grant Date -
N/A
app pub date -
Oct 20, 1995
filing date -
Oct 20, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In order to plug a pressure vessel penetration through which a heater was disposed, a stepped diameter hollow cylinder is provided with grafoil seals which are set on an annular shoulder defined by the stepped diameters of the cylinder and compressed against a lower annular edge of a sleeve which is partially machined away. The hollow cylinder is locked in position in the sleeve by a plurality of barb-shaped flanges which are formed at the upper ends of a plurality of flexible finger-like segments defined in the upper end of the hollow cylinder, and which engage the upper end of the sleeve. A rod is disposed in the hollow cylinder and welded in positon to complete the plug.
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