Spindle motor having plurality of sealing portions

Details Spindle motor having plurality of sealing portions Spindle motor having plurality of sealing portions

2011-01-11

2011-01-11

Leung, Quyen (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Rotary

C384S119000

Reexamination Certificate

active

07868499

ABSTRACT:
Disclosed herein is a spindle motor having a plurality of sealing portions. The spindle motor includes a rotor hub for rotating a recording medium mounted thereon, a rotating shaft secured to the rotor hub and supporting the rotor hub, a sleeve for rotatably supporting the rotating shaft, and a sealing member. The sealing member is secured to the sleeve and coupled to a bearing portion between the rotating shaft and the sleeve, and provides a rotary side sealing portion and a stationary side sealing portion between the rotor hub and the sleeve. The rotor hub has a ring-shaped inner wall facing the sealing member. The sealing member has a shape of a hollow cylinder, at least part of an outer circumferential surface of the sealing member facing the ring-shaped inner wall and at least part of an inner circumferential surface of the sealing member facing the sleeve being inclined and thus gradually tapered.

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Chinese Office Action issued on Feb. 27, 2009 in corresponding Chinese Patent Application 2007100075366.
Japanese Office Action dated Nov. 19, 2009 and issued in corresponding Japanese Patent Application 2007-024378.

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