Seal for a joint or juncture – Seal between fixed parts or static contact against... – Contact seal between parts of internal combustion engine
Patent
1996-11-22
1998-08-18
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
057949450
ABSTRACT:
This metal gasket comprises a bead base plate with first beads and a sub-plate stacked on the bead base plate. The sub-plate is made of a thick metal plate and formed with second and third beads and stepped portions. The second beads, the third beads and the stepped portions combine to form triple seal lines, which improve the sealing function. The sub-plate is formed with the second beads opposing the first beads of the bead base plate, with the high third beads formed inside the second beads around the holes and with the stepped portions formed outside the second beads around the holes. The third beads prevent ingress of burning gases to the first beads and also serve as a stopper to prevent the first beads from being flattened completely. The third beads therefore can add durability to the sealing function realized by the first and second beads, enhancing the sealing performance of the first and second beads and reliably preventing burning gases from escaping between the opposing surfaces.
REFERENCES:
patent: 5205566 (1993-04-01), Ueta et al.
patent: 5286039 (1994-02-01), Kawaguchi et al.
patent: 5294135 (1994-03-01), Kubouchi et al.
patent: 5348315 (1994-09-01), Kawaguchi et al.
patent: 5601292 (1997-02-01), Tanaka et al.
patent: 5609345 (1997-03-01), Miura et al.
patent: 5626348 (1997-05-01), Takada et al.
Furuta Yutaka
Geshi Kazuyuki
Kubouchi Kenji
Cummings Scott
Nippon Gasket Co. Ltd.
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