Metal gasket
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United States of America Patent
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-
May 16, 2000
Issued Date -
N/A
app pub date -
Feb 19, 1998
filing date -
Feb 21, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A metal gasket including a thin metal plate (1) provided with beads (3) and step members (4) each of which includes a coating layer having a property of high load resistance. The step member (4) is attached to the bead along a convex ridge of the bead (3), thereby increasing a quantity of compression of the bead (3), to cause a great surface pressure and decreasing an amplitude of stress in the bead (3) to improve a property of fatigue resistance of the bead (3). Also, the step member (4) is attached to the bead within a concave surface of the bead, thereby restraining the quantity of compression of the bead (3) to improve the property of fatigue resistance of the bead (3) and assuring the surface pressure on the concave surface of the bead by the step member (4).
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