Seal device

Details Seal device Seal device

2005-01-11

2005-01-11

Sandy, Robert J. (Department: 3676)

Seal for a joint or juncture

Seal between relatively movable parts

Circumferential contact seal for other than piston

C277S549000, C277S560000, C277S562000, C277S572000

Reexamination Certificate

active

06840521

ABSTRACT:
The face pressure of a seal lip for sealing is made sharp to improve the sealing ability and the seal lip is prevented from being deformed abnormally when a shaft is inserted therein. In the constitution, the inside diameter of the corner face of the sealing face is smaller than the outside diameter of the shaft. When the outside surface of the support section of the support ring expands the expandable inner surface, the inside diameter of the sealing face is also expanded diametrically to closely contact the corner face of the sealing face with the shaft.

REFERENCES:
patent: 5083802 (1992-01-01), Shimasaki et al.
patent: 6367810 (2002-04-01), Hatch
patent: 6517082 (2003-02-01), Yamada et al.
patent: 6517083 (2003-02-01), Yamada et al.
patent: 6543786 (2003-04-01), Osumi et al.
patent: 6565096 (2003-05-01), Ikeda et al.

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