Patent ID: 7290770
Filing Date: 2007-11-06
Classification: F02F,F16J

Abstract:
1. A metal laminate gasket for an internal combustion engine comprising: a first metal plate having a base portion for constituting one side of the gasket, a curved portion extending from the base portion for defining a combustion hole, and a folded portion extending from the curved portion, a ring member having a sandwiched portion disposed between the base portion and the folded portion to form a primary sealing portion together with the first metal plate, and an extension portion outside the sandwiched portion to project outside the folded portion, a second metal plate constituting another side of the gasket and disposed on a side of the folded portion, said second metal plate sandwiching the extension portion together with the base portion of the first metal plate to provide a secondary sealing portion, a third metal plate disposed outside the ring member and sandwiched between the base portion and the second metal plate, and at least one bead formed on at least one of the first and second metal plates at a portion where the extension portion is provided, said at least one bead having a height higher than either surface of the folded portion of the first metal plate, wherein a total thickness of the first and second metal plates and the ring member in the secondary sealing portion is less than a total thickness of a double thickness of the first metal plate and a thickness of the sandwiched portion in the primary sealing portion, and greater than a total thickness of the first to third metal plates in a portion where the third metal plate is sandwiched.