Patent ID: 7059612

Claim:
A gasket comprising: a ring member made of a metal material; and a covering section composed of an elastic material and which is formed to integrally cover first and second side surfaces and an inner circumferential surface of said ring member respectively, wherein said covering section comprises a first side surface section covering said first side surface of said ring member, a second side surface section covering said second side surface of said ring member, and an inner circumferential section covering said inner circumferential surface of said ring member, wherein at least three protruding sections, which protrude radially inwardly by predetermined lengths, are provided on an inner circumference of said covering section, and wherein beads are formed respectively on said first side surface section and said second side surface section of said covering section, said beads having a cross-sectional shape formed by a first lower slope section that rises at a predetermined radius of curvature from a first flat surface section of said covering section, a top section adjoining said lower slope section and which has a predetermined radius of curvature, and a second lower slope section adjoining said top section and which descends at a predetermined radius of curvature toward a second flat surface section of said covering section and wherein said first lower slope section, said top section, and said second lower slope section have the same radius of curvature respectively.