Dynamic magnetic information storage or retrieval – Record transport with head stationary during transducing – Disk record
Patent
1996-03-29
1999-06-22
Miller, Brian E.
Dynamic magnetic information storage or retrieval
Record transport with head stationary during transducing
Disk record
360 9908, G11B 1702
Patent
active
059148322
ABSTRACT:
A spindle motor includes a housing, a rotor hub section arranged rotatably with respect to the housing, a sleeve section, a shaft fit rotatably in the sleeve section, a thrust plate mounted to the sleeve section and opposite to an end surface of the shaft. A thrust dynamic pressure bearing has a dynamic pressure bearing groove formed on the thrust plate, the thrust dynamic pressure bearing including lubricating oil at a relative slide interface between the thrust plate and the end surface of the shaft. The dynamic pressure bearing groove and a circumferential portion of the thrust plate are formed by etching, and a radial dynamic pressure bearing includes lubricating oil at a peripheral interface between the shaft and the sleeve section.
REFERENCES:
patent: 5379169 (1995-01-01), Sanada
patent: 5469008 (1995-11-01), Nakajima et al.
patent: 5487608 (1996-01-01), Leuthold et al.
patent: 5538347 (1996-07-01), Itoh et al.
patent: 5559382 (1996-09-01), Oku et al.
patent: 5559651 (1996-09-01), Grantz et al.
patent: 5590003 (1996-12-01), Dunfield et al.
Matsushita Electric - Industrial Co., Ltd.
Miller Brian E.
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