Patent ID: 9284913
Filing Date: 2016-03-15
CPC Classification: F02F,F16J

Claim Text:
1. A metal gasket for providing a high-pressure combustion gas seal, the metal gasket comprising at least one metal gasket substrate having a cylinder hole opened at a position corresponding to a cylinder bore of a cylinder block of an internal combustion engine, and a circumferential bead formed circumferentially around the cylinder hole; wherein the circumferential bead is provided with a first bead portion formed of a pair of inclined walls each extending from the gasket substrate to a tip end, the tip ends of the pair of the inclined walls being spaced from each other, and a second bead portion extending from the tip ends of the inclined wall in a direction opposite to the protruding direction of the inclined walls to form a valley-like cross section; and the following relationships are satisfied: where Fh 1 is a maximum height of the first bead portion, Fh 2 is a maximum height of the second bead portion, W 1 is a half of a maximum width of the circumferential bead, and W 2 is a maximum width of the second bead portion, wherein Fh 1 and Fh 2 are measured along the protruding direction of the inclined walls and W 1 and W 2 are measured along a direction perpendicular to the protruding direction of the inclined walls, and wherein a ratio of the height of the second bead portion to the height of the first bead portion (Fh