US 6,283,480 B1Granted

Metal gasket

AssigneeNippon Gasket Co., Ltd.

InventorsMasahiko Miura, Hiroshi Uemura, Kazuyuki Geshi

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Abstract

This metal gasket is formed by interposing a shim member between a pair of elastic metal plates, and fixing the shim member and one of the elastic metal plate to each other at the portions thereof which are opposed to a water jacket, whereby the function of the shim member is secured with the fixed portions and opposed surfaces not interfering with each other. The shim member comprises a shim member body corresponding to an end surface of a cylinder body of a cylinder block, and projecting portions integral with said shim member body and extending therefrom to a position opposed to the water jacket. The fixing portions at which the shim member and one elastic metal plate are fixed to each other by crimping are positioned on the projecting portions extending to positions opposed to the water jacket. Therefore, when the metal gasket is tightened between the cylinder block and a cylinder head, the fixed portions do not interfere with the opposed surfaces thereof including end surfaces, and the sealing function of the metal gasket is not spoiled.

Claims11

Dependent claims

A metal gasket between opposed surfaces of a cylinder block having a water jacket and a cylinder head fixed to said cylinder block, said cylinder block being provided therein with a cylinder body to define cylinder bores and said water jacket surrounding said cylinder body, said metal gasket comprising a pair of elastic metal plates and a shim member interposed between said elastic metal plates, said elastic metal plates being provided with first bore holes aligned with said cylinder bores of said cylinder block and beads formed along the circumference of said first bore holes, said shim member being provided with second bore holes in alignment with said first bore holes of said elastic metal plates, said shim member extending only over an area confronting said beads formed on said elastic metal plates and having projecting portions arranged around said shim member adapted to partially overhang said water jacket, said shim member being crimped at said projecting portions to engage at least one of said elastic metal plates to form crimped sections on said projecting portions, wherein said crimped sections overhang said water jacket when said cylinder head is fixed on the cylinder block.

Dependencies are inferred from the claim text.