Metal - flat gasket with main - and auxiliary bead tightly

摘要

PROBLEM TO BE SOLVED: To secure a large bearing pressure so as to improve the sealing effect while eliminating the distribution of bearing pressure in the condition that the bearing pressure is generated by fastening a gasket by forming a gasket so that the bearing pressure is generated for concentration to a top of a main bead and auxiliary beads provided in a gasket. ;SOLUTION: A metal plate 2 forming a cylinder head gasket for internal combustion engine is provided with a bead part 6 formed of a main bead 6A and auxiliary beads 6B formed along both sides of the main bead. The bead part 6 is formed into the condition that the auxiliary beads 6B are projected to surfaces opposite to the main bead 6A. Height HB of the auxiliary bead 6B is set lower than the height HA of the main bead 6A, and width between both side skirts of the auxiliary bead part 6B is formed narrower than the width between both side skirts of the main bead 6A. With this structure, when bearing pressure is generated by fastening a gasket, bearing pressure is generated for concentration to a top of the main and the auxiliary bead parts 6A, 6B so as to secure the excellent seal performance.;COPYRIGHT: (C)1999,JPO