Disc drive motor spindle hub for holding a disc and spacer stack firmly in place
US5089922A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 31, 1990 |
| Grant date | Feb 18, 1992 |
| Priority date | — |
| Expiry date | Jul 31, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B19/2009
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A specially designed disc mounting spindle hub having a disc mounting flange protruding frm a substantially cylindrical hub portion. The disc mounting flange has a raised area about the periphery of the flange upon which a disc rests. The remainder of the discs are alternately stacked with spacer rings upon the first disc. A clamping ring is attached to the substantially cylindrical hub portion opposite the disc mounting flange and, working cooperatively with the flange, imparts a force upon the disc and spacer ring stack to hold the discs in place. The maximum force applied to the stack is in line with the raised peripheral ara that the first disc rests upon. Additionally, the force bends the disc mounting flange. However, the first disc pivots upon the raised area maintaining its parallel orientation with respect to the other discs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.