Patent ID: 7011313
Filing Date: 2006-03-14
Classification: F16J

Abstract:
1. A metallic gasket including a base plate made of a thin metal plate, said base plate having one or not less than two openings, such as bolt holes, and having beads formed along seal lines and a first thickness-increased portion made thicker than the remaining portions of said base plate, a surface pressure being made to concentrate on said first thickness-increased portion and said beads being deformed in a through-thickness direction to thereby seal a joint of opposing joint surfaces when said metallic gasket is sandwiched between the joint surfaces and fastened by clamping bolts, wherein said bead comprises, in combination, a metal bead and a rubber bead, said metal bead being formed by bending said base plate in a through-thickness direction to create a convex portion, on one surface side of said base plate, with a height higher than the thickness-increased portion and said rubber bead made of an elastic sealing material being fixed to a surface of said convex portion of said metal bead and filled in a concave portion opposite said convex portion, wherein said rubber bead is compressed and deformed in the through-thickness direction in cooperation with deformation of said metal bead, wherein one or not less than two lines of protrusions are formed along said seal line on at least one of the surface of said elastic sealing material fixed to the surface of said convex portion and the surface of said elastic sealing material filled in said concave portion, said elastic sealing material parts constituting said rubber bead.