Motor
US5952753A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 13, 1998 |
| Grant date | Sep 14, 1999 |
| Priority date | — |
| Expiry date | Feb 13, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/497
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The object of the present invention is to provide a vibration-proof miniature motor of high endurance including a compact enough double row bearing apparatus having a shaft of sufficient mechanical rigidity. In accordance with the present invention, a motor comprising a double row bearing apparatus, the apparatus including; a stepped shaft having larger and smaller diameter shaft portions, an inner race way groove provided on the outer peripheral surface of the larger diameter portion, balls interposed between the inner race way groove and an outer race way groove formed on an inner surface of an outer race surrounding the larger diameter portion, and a ball bearing including inner and outer races and balls interposed therebetween, wherein the ball bearing is fitted at its inner race over the smaller diameter portion, and the lower end of said larger diameter shaft portion of the double row bearing apparatus is installed and secured on a base; said hard disk drive device further comprising, a cylindrical sleeve provided through a rotor, said sleeve opening at its both upper and lower ends, wherein said sleeve is provided on its inner surface with upper and lower larger inner diamet…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.