Metal laminate gasket with stepped sealing portion

Details Metal laminate gasket with stepped sealing portion Metal laminate gasket with stepped sealing portion

1997-07-11

1999-05-04

Knight, Anthony

Seal for a joint or juncture

Seal between fixed parts or static contact against...

Contact seal between parts of internal combustion engine

277601, F02F 1100

Patent

active

058994629

ABSTRACT:
A metal laminate gasket of the invention is formed of first, second and third metal plates. The first metal plate includes a curved portion to define a first hole corresponding to a hole of an engine to be sealed, and a flange extending from the curved portion. The second metal plate is located above a first base portion of the first metal plate, and has a second hole with a diameter greater than a size of the flange. The third metal plate is situated above the second metal plate, and includes an inner portion situated around a third hole under the flange. A stepped portion is formed between the inner portion and a third base portion by bending the third metal plate to have a thickness greater than that of the third metal plate. When the gasket is compressed, the stepped portion is disposed between an outer edge of the flange and an edge of the second hole and provides a surface pressure thereat. The stepped portion securely seals around the hole of the engine outside a main sealing device.

REFERENCES:
patent: 4739999 (1988-04-01), Ishii et al.
patent: 4938488 (1990-07-01), Udagawa et al.
patent: 5120078 (1992-06-01), Udagawa
patent: 5725222 (1998-03-01), Kobayashi

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