Fluid dynamic bearing motor

Details Fluid dynamic bearing motor Fluid dynamic bearing motor

2006-10-24

2006-10-24

Footland, Lenard A. (Department: 3682)

Bearings

Rotary bearing

Fluid bearing

C384S114000, C384S292000

Reexamination Certificate

active

07125170

ABSTRACT:
Provided is a fluid dynamic bearing motor in which a rotor is rotatably supported by forming an oil gap between the rotor and a stator to form a fluid dynamic pressure bearing and a plurality of oil grooves are formed in a surface of the rotor or stator forming the oil gap and facing each other. The oil grooves include a first oil groove inclined at a first angle with respect to a circumferential direction, and a second oil groove extending from an end portion of the first oil groove and inclined at a second angle with respect to the circumferential direction. The first angle is formed relatively greater than the second angle.

REFERENCES:
patent: 5273368 (1993-12-01), Asada et al.
patent: 5516213 (1996-05-01), Moriyama et al.

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