Vertical motor, method of manufacturing same, polygon mirror motor using said motor, and bearing device for use in said motor
US5417507A · kind A · utility
19Cited by
7References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 4, 1993 |
| Grant date | May 23, 1995 |
| Priority date | — |
| Expiry date | Feb 4, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K21/14
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.