Oil seal

Details Oil seal Oil seal

2005-10-18

2005-10-18

Peavey, Enoch (Department: 3676)

Seal for a joint or juncture

Seal between relatively movable parts

Circumferential contact seal for other than piston

C277S571000, C277S572000

Reexamination Certificate

active

06955358

ABSTRACT:
An oil seal (10) includes a first seal (20) for sealing an engine (1) side and a second seal (30) for sealing a flywheel (4) side. The first seal (20) is an axial seal abutted on an inner ring (11) from the direction along the axial direction of a crank shaft (2). The second seal (30) is a radial seal abutted on the inner ring (11) from the direction along the radial direction of the crank shaft (2). A communication hole (25) is provided on the second seal (30), thereby preventing a space (40) surrounded by the first seal (20), the second seal (30) and the inner ring (11) from the occurrence of the negative pressure.

REFERENCES:
patent: 5655781 (1997-08-01), Petrak
patent: 8-14399 (1996-01-01), None
patent: 2002-250449 (2002-09-01), None

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