Patent ID: 7108268

Claim:
A metal laminate gasket comprising: a first surface plate having a hole and a first bead around the hole, a second surface plate having a base portion disposed under the first surface plate, a bent portion located in the hole, and a folded-back piece extending from the bent portion and located above the first bead, an intermediate plate disposed between the first surface plate and the base portion of the second surface plate, and having a second bead surrounding the hole, and a curved portion formed in the first surface plate adjacent to an outer peripheral edge of the folded-back piece and the first bead, said curved portion having a crank shape section such that bent angles of upper and lower bent portions of the first surface plate are substantially 90 degrees and a height higher than that of the folded-back piece so that the first bead, the curved portion and the second bead provide three sealing pressures gradually decreasing outwardly from the hole.