Data storage device with mechanism to control rotation of...

Details Data storage device with mechanism to control rotation of... Data storage device with mechanism to control rotation of...

2006-04-18

2006-04-18

Schuberg, Darren (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Rotary

C310S06700R, C310S090500, C310S156040, C310S051000, C360S099080, C360S098070

Reexamination Certificate

active

07030527

ABSTRACT:
Embodiments of the present invention effectively control, by a simple structure, floating of a rotor of a fluid dynamic bearing motor mounted in a hard disk drive. In one embodiment, a base is formed of a magnetic material. The attractive force caused by the magnetic force acts between a bottom of the base and a magnet unit that is constituted of a rotor magnet and a back yoke. This makes it possible to attract a rotor to the base against the buoyant force produced by a thrust bearing, and thereby to effectively control the rotation of the rotor. On the bottom of the base, at a position facing the magnet unit, a convex part protruding from the inner surface of the base is formed in a ring-shape. Adjusting the height, or the width, of the convex part makes it possible to control the magnetic back pressure applied to the rotor.

REFERENCES:
patent: 4672250 (1987-06-01), Seitz
patent: 5559382 (1996-09-01), Oku et al.
patent: 5831355 (1998-11-01), Oku
patent: 6836388 (2004-12-01), Nishimura et al.
patent: 2004/0061404 (2004-04-01), Fujii et al.
patent: 2004/0160136 (2004-08-01), Yoo et al.
patent: 2005/0006962 (2005-01-01), Horng
patent: 2005/0057107 (2005-03-01), Xu et al.
patent: 2005/0058374 (2005-03-01), Gomyo et al.

Affiliated with

Also associated with

Rating

Data storage device with mechanism to control rotation of... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Data storage device with mechanism to control rotation of..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Data storage device with mechanism to control rotation of... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3581478