Bearings – Rotary bearing – Antifriction bearing
Patent
1989-09-11
1991-01-15
Footland, Lenard A.
Bearings
Rotary bearing
Antifriction bearing
384446, 384912, F16C 1908
Patent
active
049849093
ABSTRACT:
An improved bearing device for use in a spindle motor for driving computer hard disks is disclosed. The device includes a shaft, bearings supporting the shaft, and a bearing holder for holding the bearings. The bearing holder is made of a magnetic material. The shaft, the bearings, and the bearing holder are made of materials having substantially the same thermal expansion coefficient.
REFERENCES:
patent: 4065190 (1977-12-01), Hallerback
patent: 4173376 (1979-11-01), Standing et al.
patent: 4531846 (1985-07-01), Raj
patent: 4605321 (1986-08-01), Brandenstein et al.
patent: 4628384 (1986-12-01), Raj et al.
Footland Lenard A.
Kabushiki Kaisha Sankyo Seiki Seisakusho
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