Metal gasket
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United States of America Patent
Stats
-
Aug 14, 1990
Grant Date -
N/A
app pub date -
Jun 23, 1989
filing date -
Jun 30, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A metal gasket has an opening for allowing fluid to pass through the gasket, relatively small through-holes for receiving bolts, and a raised portion surrounding the entire circumference of the opening. The raised portion has a double-bead structure including an inner peripheral bead portion formed by an intermediate flat portion and a first frusto-conical portion which connects the intermediate flat portion with an inner peripheral flat portion, and an outer peripheral bead portion formed by the intermediate flat portion and a second frusto-conical portion which connects the intermediate flat portion with an outer peripheral flat portion. The second frusto-conical portion is inclined at an angle which is smaller than that at which the first frusto-conical portion is inclined.
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