Metal laminated type of cylinder head gasket with asymmetrical bead
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United States of America Patent
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Oct 6, 2009
Grant Date -
Jul 10, 2008
app pub date -
Jan 4, 2008
filing date -
Jan 9, 2007
priority date (Note) -
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status (Latency Note)
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Abstract
A metal laminate cylinder head gasket includes first and second metal plates laminated together. The first metal plate has a combustion hole, and an asymmetrical bead formed around the combustion hole. The asymmetrical bead has a large radius portion with a width (a) at a side of the combustion hole from a top of the bead, a small radius portion with a width (b) at the other side from the top of the bead, and a smallest radius (R). The second metal plate is laminated at a projecting side of the asymmetrical bead. A relationship between (a) and (b) is (a)>(b), the smallest radius (R) is (R)≧0.5 mm, and a relationship between the width (a) and the radius (R) is (a)≧2(R).
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