Metal gasket

Details Metal gasket Metal gasket

1997-08-19

1998-08-11

Cummings, Scott

Seal for a joint or juncture

Seal between fixed parts or static contact against...

Contact seal between parts of internal combustion engine

277595, F16J 1508

Patent

active

057916594

ABSTRACT:
The present invention comprises a pair of bead plates on which beads are formed, and an intermediate plate on which first and second stepped portions are formed. One of the bead plates is provided with auxiliary beads so as to prevent a full compression of the beads and increase the sealability. This metal gasket comprises first and second bead plates having beads and extending along the circumferences of holes, and an intermediate plate interposed between the bead plates. The intermediate plate is provided in the regions thereof which extend along the circumferences of the holes and on the inner side of the beads with first stepped portions extending toward the first bead plate, and second stepped portions extending toward the second bead plate. The second bead plate is provided with auxiliary beads extending toward the second stepped portions. The auxiliary beads are adapted to engage the intermediate plate to increase the surface pressure and prevent the leakage of a high-temperature gas toward the beads on the first and second bead plates and the permanent set in fatigue of wing parts of the second stepped portions of the intermediate plate.

REFERENCES:
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patent: 5544901 (1996-08-01), Kuboichi et al.
patent: 5568932 (1996-10-01), Tanaka et al.
patent: 5601292 (1997-02-01), Tanaka et al.
patent: 5609345 (1997-03-01), Miura et al.
Japanese Patent Abstract No. 1-104953 filed 21 Apr. 1989.
Japanese Patent Abstract No. 1-35057 filed 02 Jun. 1989.
Japanese Patent Abstract No. 63-246571 filed 13 Oct. 1988.
Japanese Patent Abstract No. 63-246572 filed 13 Oct. 1988.
Japanese Patent Abstract No. 1-73157 filed 17 Mar. 1989.

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