Single layer or multi-layer metal cylinder head gasket and metho

Details Single layer or multi-layer metal cylinder head gasket and metho Single layer or multi-layer metal cylinder head gasket and metho

1996-11-20

1998-03-17

DePumpo, Daniel G.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277236, 298883, F16J 1508

Patent

active

057277958

ABSTRACT:
A metallic gasket for use in an internal combustion engine has seals around the gasket openings which are formed by a two-step coining operation plus a folding operation. The gasket has a base plate including a folding portion located between an edge of an opening and a fold line. A channel and a reduced thickness portion are formed in the folding portion by a first coining operation. The channel is spaced from the edge of the opening and spaced from the fold line. Next the folding portion is folded back onto the base plate of the gasket. Finally, a second coining operation takes place to flatten the folded seal to a final thickness and produces material flow between the base plate and the folding portion.

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