Spindle motor with a magnetic shield plate having an...

Details Spindle motor with a magnetic shield plate having an... Spindle motor with a magnetic shield plate having an...

2011-03-22

2011-03-22

Renner, Craig A. (Department: 2627)

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Disk record

C310S051000, C310S06700R, C360S097020

Reexamination Certificate

active

07911734

ABSTRACT:
A disc driving motor of the invention includes a base, a hub having a ring-shaped disc receiving face on which a disc is placed, a hydrodynamic bearing rotatably supporting the hub, a motor unit mounted on the base, the motor unit having an outer diameter larger than that of the disc receiving face and applying a rotational force to the hub, and a magnetic shield plate disposed on an axial clearance formed between the disc and the motor unit when the disc is placed on the disc receiving face. The magnetic shield plate has an opposed face opposed to the disc when the disc is placed on the receiving face, the opposed face being inclined toward the disc receiving face.

REFERENCES:
patent: 6486578 (2002-11-01), Kitahori et al.
patent: 6549366 (2003-04-01), Ichiyama
patent: 2002/0018315 (2002-02-01), Nii et al.
patent: 2006/0056105 (2006-03-01), Eguchi et al.
patent: 2000-331460 (2000-11-01), None
patent: 2000331460 (2000-11-01), None
patent: 2001-76459 (2001-03-01), None

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