Valve seal
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United States of America Patent
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-
Jan 12, 1993
Grant Date -
N/A
app pub date -
Feb 7, 1992
filing date -
Feb 20, 1991
priority date (Note) -
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Abstract
A fluid flow control valve is provided with a seal comprising a thin metallic film backed by a resiliently deformable body. The seal is mounted on a closure part which may be either the valve stem or the valve seat. The thin film and deformable body are deformed so as to conform to the surface the metallic film seals against as the valve is closed. As the valve is opened, the deformable body returns to its initial state thus returning the thin film to its initial state.
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