Laminated metal gasket for a cylinder block of an engine
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United States of America Patent
Stats
-
Mar 9, 1999
Grant Date -
N/A
app pub date -
Jun 19, 1997
filing date -
Jun 20, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
This metal gasket comprises a beaded base plate, an intermediate plate and a thin plate, and secures a stable long-standing sealing performance with a face-to-face pressure balance kept properly. This metal gasket is provided with full beads on the beaded base plate, stopper beads on the intermediate plate, and folded portions, which hold the edge portions of bores of the intermediate plate, and full beads, which are laminated on the stopper beads on the intermediate plate, on the thin plate. The folded portions are formed so that they are not laminated on the stopper beads when the metal gasket is in practical use, i.e., when the folded portions are in a compressed condition. The folded portions and stopper beads display a stopper function of preventing the full compression of the full beads on the beaded base plate, and a sealing function of preventing the entry of a combustion gas into the clearances defined by the full beads. The face-to-face pressure occurring on the folded portions, stopper beads and full beads can be controlled properly, and the face-to-face pressure balance can be maintained properly.
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