Bimetallic spiral wound gasket
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United States of America Patent
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Jun 16, 1987
Grant Date -
N/A
app pub date -
Jul 9, 1985
filing date -
Jul 9, 1985
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A temperature-sensitive gasket comprised of an annular ring formed by alternating layers of a spirally wound bimetallic strip and an adjacent strip of soft filler material, such as Teflon. When viewed in cross-section, the bimetallic strip has a centrally located V-shaped fold in an otherwise flat surface. Differences in the relative rates of thermal expansivity between the convex surface and the concave surface of the bimetallic strip cause the edges of the strip to spread apart, providing a reversably tighter seal between the surfaces adjacent the gasket. The spiral wound bimetallic and filler strips are also used in combination with annular compression rings.
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