Patent ID: 6851677
Filing Date: 2005-02-08
Classification: F16J

Abstract:
1. A cylinder head gasket for an internal combustion engine having a plurality of holes to be sealed, and high and low heat load portions around the holes to be sealed, comprising: a first metal plate having a base portion, first holes formed in the base portion corresponding to the holes to be sealed, first beads formed around the respective first holes, curved portions extending from the base portion to define the first holes, and flanges extending from the respective curved portions and located under the first beads, second metal plates, each being disposed between the base portion and the flange, and having a second hole and a second bead surrounding the second hole and extending toward the base portion above the flange, each of said second metal plates being a ring plate with the second bead disposed on each of the flanges under the first bead such that the second bead is spaced from the first bead not to contact each other when the gasket is compressed, a third metal plate disposed under the base portion of the first metal plate, and a fourth metal plate disposed between the base portion of the first metal plate and the third metal plate without overlapping the second metal plate, wherein at least one of a distance between the first and second beads and a width of at least one of the first and second beads at the high heat load portion is formed to be greater than at least one of a distance between the first and second beads and a width of at least one of the first and second beads at the low heat load portion to thereby reduce a surface pressure at the high heat load portion when the gasket is compressed.