Spindle motor having dynamic pressure fluid bearing

Details Spindle motor having dynamic pressure fluid bearing Spindle motor having dynamic pressure fluid bearing

2007-09-04

2007-09-04

Le, Dang (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Rotary

C384S107000

Reexamination Certificate

active

11434781

ABSTRACT:
A spindle motor includes a rotor section, a stator section, and thrust and radial dynamic pressure fluid bearings. The thrust dynamic pressure fluid bearing includes first and second thrust dynamic pressure fluid bearing sections each generating a dynamic pressure in a direction opposite to each other. Lubrication fluid is filled in a filling section as a prescribed gap between the rotor and stator sections. The filling section includes a first filling section linking one end section opened to the outside, the second thrust dynamic pressure fluid bearing section, the first thrust dynamic pressure fluid bearing section and the radial dynamic pressure fluid bearing in order and a second filling section linking a point allocated between the second and first thrust dynamic pressure fluid bearing sections and another point allocated between the first thrust dynamic pressure fluid bearing section and the radial dynamic pressure fluid bearing in the first filling section.

REFERENCES:
patent: 5956204 (1999-09-01), Dunfield et al.
patent: 7133250 (2006-11-01), Herndon et al.
patent: 2004-11897 (2004-01-01), None

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