Disc centering sleeve for a disc drive
US5828518A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 17, 1996 |
| Grant date | Oct 27, 1998 |
| Priority date | — |
| Expiry date | Dec 17, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K5/24
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A disc pack assembly is provided for use within a disc drive having a spindle motor assembly rotatable about a central axis, with a spindle hub and a hub flange. A disc centering sleeve of the current invention with an inner raised portions and outer raised portions is placed around the spindle hub. An information storage disc is stacked on the spindle hub and rests on the hub flange. A disc spacer is placed on top of the information storage disc. A disc clamp is used to secure the information storage disc to the spindle hub. The inner raised portions abut against the outer surface of the spindle hub and the outer raised portions abut against the inner surface of the information storage disc and the disc spacer, centering the information storage disc and the disc spacer concentric with the central axis. In specific embodiments, the inner raised portions and the outer raised portions are alternatively positioned along the circumference of the disc centering sleeve and further, the inner raised portions and outer raised portions are alternatively positioned equidistant from each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.