Vertical motor, method of manufacturing same, polygon mirror mot

Details Vertical motor, method of manufacturing same, polygon mirror mot Vertical motor, method of manufacturing same, polygon mirror mot

1993-02-04

1995-05-23

Hannon, Thomas R.

Bearings

Rotary bearing

Fluid bearing

384133, F16C 3382, F16C 3206

Patent

active

054175070

ABSTRACT:
There is disclosed a polygon mirror motor in which an annular projection is formed on an upper surface of a rotor support member supporting a polygon mirror, and the annular projection supports a part of a lower surface of the polygon mirror. Radial bearings supporting a shaft of the motor have a plurality of oil grooves extending over about a half of the dimension of the radial bearing in a thrust direction. A magnetic fluid is filled in a space defined by the shaft, a support tube of a bearing support member and the radial bearings.

REFERENCES:
patent: 4254961 (1981-03-01), Fersht et al.
patent: 4691998 (1987-09-01), Sakagito
patent: 4717223 (1988-01-01), Ishida et al.
patent: 4875110 (1989-10-01), Kazama et al.
patent: 4938611 (1990-07-01), Nii et al.
patent: 4948152 (1990-08-01), Kilthau et al.
patent: 5006765 (1991-04-01), Schmider

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