Magnetic disk drive including labyrinth seal and magnetic seal

Details Magnetic disk drive including labyrinth seal and magnetic seal Magnetic disk drive including labyrinth seal and magnetic seal

1996-01-16

1997-02-04

Wolff, John H.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Disk record

360 9807, G11B 1702

Patent

active

056005148

ABSTRACT:
A magnetic disk drive capable of perfectly preventing dispersion of oil mists of a grease. The magnetic disk drive has a labyrinth seal disposed between a flange and a bushing of a spindle motor, thereby preventing a possible entry of oil mist of the grease applied to bearings into a sealed chamber. The magnetic disk drive further has a magnetic seal disposed between a rotor and a spindle shaft which are located axially opposite to the labyrinth seal relative to a stator. A combination of the labyrinth seal and the magnetic seal ensures improvement of the spindle motor while maintaining a sufficient sealing effect.

REFERENCES:
patent: 4535373 (1985-08-01), Schuh
patent: 4890174 (1989-12-01), Chalmers et al.
patent: 4922406 (1990-05-01), Schuh
patent: 5132856 (1992-07-01), Takahashi
patent: 5305164 (1994-04-01), Elsing

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