Aerodynamic bearing assembly for spindle motor for hard disk...

Bearings – Rotary bearing – Plural bearings one plain and one antifriction

Reexamination Certificate

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Details

C384S100000, C384S107000, C310S090000, C360S099080

Reexamination Certificate

active

10496810

ABSTRACT:
Disclosed is an aerodynamic bearing assembly for a spindle motor for hard disk drives, in which a hub of the spindle motor is pivoted in both radial and thrust directions by the ball bearing, which directly contacts the center of the hub, to perform rotation according to the rotational principle of a whirligig, and is subject to the thrust load through the aerodynamic bearing assembly with air groove(s) without being in contact with it, so that the hub maintains a rotational center without mechanical contact resulting in noise and starting failure of the assembly during an initial starting (low-speed rotation). The assembly includes air grooves, the air groove generating aerodynamic pressure between the hub and the aerodynamic bearing while the hub rotates.

REFERENCES:
patent: 5373407 (1994-12-01), Stupak et al.
patent: 5877916 (1999-03-01), Papst
patent: 6036368 (2000-03-01), Takehara et al.
patent: 6936944 (2005-08-01), Kim
patent: 1074753 (2001-02-01), None
patent: 59-082664 (1984-05-01), None
patent: 20-2000-0003984 (2000-02-01), None

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