Spiral wound gasket
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United States of America Patent
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-
Nov 10, 1992
Grant Date -
N/A
app pub date -
Sep 30, 1991
filing date -
Sep 30, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A spiral wound gasket comprises an annulus constituted by a plurality of superposed turns of a profiled metal strip wound upon itself to form a spiral and, interposed between at least some of said superposed turns, a number of turns of a relatively soft sealant material in strip form, the thickness of said metal strip being selected so that prior to use the wound metal spiral is essentially flush with the surface of an associated guide ring and the thickness of the strip of relatively soft sealant material being selected so that prior to use, it projects a significant distance on both sides of the gasket from said superposed metal turns axially of said annulus. The preferred relatively soft sealant material is exfoliated graphite foil, which projects from the metal spiral to define an overall gasket thickness on the order of 25 to 40% greater than that of the guide ring.
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Cited Art Landscape
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