Patent ID: 6508474
Filing Date: 2003-01-21
Classification: F16J

Abstract:
A metal gasket for an internal combustion engine with a hole to be sealed, comprising:a first metal plate extending substantially throughout an entire area to be sealed, said first metal plate including a first hole corresponding to the hole of the engine, and a first bead projecting outwardly from the first metal plate to surround the first hole and having a concave formed inside the first bead, said concave extending inwardly from an outer surface of the first metal plate, a second metal plate including a second hole corresponding to the first hole and a second bead projecting outwardly from the second metal plate to surround the second hole and having a concave formed inside the second bead, said second metal plate being disposed on the first metal plate such that the concaves of the first and second metal plates are piled correspondingly and face outwardly of the metal gasket, and foamed sealing materials disposed in the respective concaves to project outwardly from the outer surfaces of the first and second metal plates, each foamed sealing material including an inside portion disposed in the concave and an outside portion located outside the concave, said outside portion having a length extending over a width of the concave in the width direction of the bead and a height projecting beyond the concave so that even if a foreign material is attached to one of the beads, the foreign material is retained in the foamed sealing material in the bead to substantially prevent an effect of the foreign material to a sealing ability of the bead.