Metal gasket

#1. Field of the Invention

#This invention relates to a metal gasket used to seal a narrow space between opposed surfaces in a multi-cylinder engine and formed by interposing an intermediate plate between bead base plates comprising two elastic metal plates provided with beads along holes.

#1. Description of the Prior Art

#FIG. 1 is a partial plan view showing an example of a bead base plate to be incorporated in the metal gasket according to the present invention;

#FIG. 2 is an enlarged section taken along the line II--II on the bead base plate of FIG. 1;

#FIG. 3 is an enlarged section taken along the line III--III on the bead base plate of FIG. 1:

#An embodiment of the metal gasket according to the present invention will now be described with reference to FIG. 1-6. In the drawings showing embodiments which will be described later, parts and portions having the same construction and function are designated by the same reference numerals, and the duplication of descriptions thereof is omitted. In the following embodiments, head gaskets will be described.

#The metal gasket according to the present invention is held between a cylinder head 15 and a cylinder block 16 or between the cylinder head 15 and an exhaust manifold (not shown) as shown in, for example, FIGS. 5 and 6, to seal a clearance between the opposed fixing surfaces. This metal gasket is provided with combustion chamber holes, i.e. holes 7 corresponding to cylinder bores formed in the cylinder block 16, or holes (not shown) corresponding to exhaust passages in the exhaust manifold. This metal gasket is provided with a plurality of holes 7 in a parallel-arranged state so that the metal gasket can be applied to a multi-cylinder engine, such as a 4- cylinder engine and a 6-cylinder engine.

#Bead base plates 1, 2 constituting the metal gasket according to present invention will be described with reference to FIGS. 1, 2 and 3.