Patent ID: 6105971
Filing Date: 2000-08-22
Classification: F16J

Abstract:
A metal gasket for use in sealing joint surfaces of a cylinder head and a cylinder block of an internal combustion engine, the metal gasket comprising a plural number of metal plates and an annular resin layer, each of the metal plates having at least one opening corresponding to the combustion chamber hole of the gasket and bolt holes, wherein:the plural number of the metal plates are laminated so as to be overlaid on each other, and a first metal plate disposed on the side of one outer surface of the gasket has a bent portion formed by turning back a peripheral portion of the opening, the bent portion having a curved portion which defines the combustion chamber hole of the gasket and is connected to a main portion of the first metal plate, and a flange portion which extends generally parallel with the main portion, and the bent portion enclosing the peripheral portion of the opening of at least one of the remaining metal plates;the at least one of the remaining metal plates enclosed by the bent portion has a bead portion for surrounding the combustion chamber hole, the bead portion being projected toward such a direction as to form a recess in a surface inside the outer surface of the gasket;the annular resin layer is disposed inside of the recess, filling a part of the depth of the recess, and the recess and the resin layer are covered by one of the plural number of the metal plates other than the metal plate having the bead portion;the thickness of the gasket in an annular portion in which the resin layer is disposed is thicker than the thickness of the gasket in a remaining portion thereof; andthe annular resin layer serves as a stopper for limiting the compression of the bead portion when the gasket is compressed between the joint surfaces.