Sealing device

Details Sealing device Sealing device

2011-03-08

2011-03-08

Patel, Vishal (Department: 3676)

Seal for a joint or juncture

Seal between relatively movable parts

Circumferential contact seal for other than piston

C277S611000, C277S638000

Reexamination Certificate

active

07900935

ABSTRACT:
To reduce a shaft insertion load and prevent extrusion of a seal ring to the low pressure side, a sealing device has a seal ring in an installation groove formed on a shaft to have a tapered groove bottom section and a backup ring having a tapered section corresponding to the tapered groove bottom section, a gap is provided between a side wall surface at the low-pressure side of the mounting groove and a side end surface of the backup ring, a peripheral surface of the backup ring at the opposite side of the tapered section has a tapered surface which comes closer to a peripheral surface of a housing at the low-pressure side, and the tapered section is formed to have a two-staged taper.

REFERENCES:
patent: 7708283 (2010-05-01), Azibert et al.
patent: 2006/0232066 (2006-10-01), Kanagae et al.
patent: S46-4226 (1971-02-01), None
patent: 11-315925 (1999-11-01), None
patent: 2007303635 (2007-11-01), None

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