Flat sealing joint forming in particular a cylinder head gasket for an internal-combustion reciprocating-piston engine

Claim 1

An internal combustion piston engine of the type embodying at least a cylinder head, a cylinder water jacket, a cylinder barrel, and outer flange means on said barrel resting upon an edge of said cylinder water jacket, said cylinder head and said barrel having confronting surfaces in a zone located radially inwardly with respect to said outer flange means of said cylinder barrel, and the improvement comprising a gasket dimensioned to lie between said confronting surfaces and consisting of a substantially flat metal sealing packing covering substantially the whole of said confronting surfaces of said barrel with said cylinder head and said gasket consisting of a pair of adjacent respectively radially aligned outer and inner annular portions, said outer portion having a substantially smooth face, said inner portion being more easily deformable than said outer portion upon being clamped between said confronting engaging surfaces and having a greater radial width than the outer radial portion, said inner portion being further characterized in that said inner portion is provided with a series of concentric alternate grooves and projections provided on at least one of the faces of said gasket and are comprised of radially disposed flute-like formations, the crests of which are substantially flat and in substantially parallel relation to such face.