Importance

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Abstract

The present invention relates to a metal gasket for use in sealing the joint surfaces of the cylinder head and the cylinder block of an internal combustion engine. The metal gasket comprises a plural number of metal plates and a rigid resin layer, each of said metal plates having opening(s) corresponding to the combustion chamber hole(s) of the gasket and bolt holes. The plural number of the metal plates are laminated so as to be overlaid on each other. The first metal plate disposed on the side of one outer surface of the gasket has a bent portion formed by turning back the peripheral portion of its opening, said bent portion having a curved portion which defines the combustion chamber hole and a flange portion. The bent portion of the first metal plate encloses the peripheral portion of the opening of one of the remaining metal plates having a bead portion for surrounding the combustion chamber hole. The annular rigid resin layer is disposed in the recess of said bead portion and covered with other metal plate. The thickness of a part of the gasket in which the rigid resin layer is disposed is larger than that of the remaining part of the gasket. The difference in partial thickness of the gasket can be adjusted by the thickness of the rigid resin layer. The rigid resin layer is preferably a layer of a thermocured epoxy resin.

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First Claim