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US 4,635,949 AGranted
Cylinder-head gasket
AssigneeSociete Anonyme Curty
InventorsJacques D. H. Lucas, Dominique H. P. M. Samson
Life of this patent
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Abstract
A cylinder-head gasket has a sheet formed of a rigid organic and substantially nonthermoplastic material such as phenylene polysulfide that does not soften at engine-operating temperatures of 130.degree. C.-150.degree. C. The sheet has a plurality of gas-passage holes and liquid-passage holes. Respective elastomeric seals are secured to the edges of the liquid-passage holes and respective metallic seal rings are secured to the edges of the gas-passage holes.
Claims10
A cylinder-head gasket comprising:
- a sheet formed of a rigid organic and substantially nonthermoplastic material and having a plurality of gas-passage holes having edges and a plurality of liquid-passage holes having edges;
- respective elastomeric seal rings secured to said sheet adjacent edges of said liquid-passage holes;
- and
- respective metallic rings secured to said edges of said gas-passage holes, each of said liquid-passage holes being surrounded by a thick portion of said sheet at said edges and being separated from the thick portion at an edge of another liquid passage by a region which is thinner than said thick portions.
1 more element
A cylinder-head gasket comprising:
- a sheet formed of a rigid organic and substantially nonthermoplastic material and having a plurality of gas-passage holes having edges and a plurality of liquid-passage holes having edges;
- respective elastomeric seal rings secured to said sheet adjacent edges of said liquid-passage holes;
- and
- respective metallic rings secured to said edges of said gas-passage holes, said sheet being formed with respective annular grooves adjacent the edge of each of said liquid-passage holes, said seal rings being seated in said annular grooves.
1 more element
A cylinder-head gasket comprising:
- a sheet formed of a rigid organic and substantially nonthermoplastic material and having a plurality of gas-passage holes having edges and a plurality of liquid-passage holes having edges;
- respective elastomeric seal rings secured to said sheet adjacent edges of said liquid-passage holes;
- and
- respective metallic rings secured to said edges of said gas-passage holes, said sheet being formed with respective annular grooves adjacent the edge of each of said liquid-passage holes and receiving a respective elastomeric ring, said metallic rings being of undulating cross section.
1 more element
Dependencies are inferred from the claim text.