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US 4,721,315 AGranted
Metallic cylinder head gasket
AssigneeNihon Metal Gasket Kabushiki Kaisha
InventorKosaku Ueta
Life of this patent
Estimating the term…
Abstract
A metallic gasket including: an elastic metal base plate having a circular bead surrounding a combustion chamber hole, and a compensating portion provided on the inner edge part of the base plate so as to directly surround this hole. The spring constant of the bead increases as the distance from the fastening bolts increases to allow uniform sealing pressure. The thickness of the compensating portion gradually increases as the distance from the fastening bolt increases.
Claims12
A metallic gasket comprising:
- a base plate comprising an elastic metal plate having a combustion chamber hole and at least one bolt hole therethrough;
- an annular bead provided in said base plate so as to surround said combustion chamber hole;
- said bead having a spring constant which increases as the distance of the bead from the bolt hole increases, thereby allowing a uniform sealing pressure to be applied to a sealing portion;
- and
- compensating means provided along the edge of said combustion chamber hole of said base plate so as to surround said hole;
- the thickness of said compensating means gradually increasing as the distance from the bolt hole increases.
3 more elements
Dependencies are inferred from the claim text.