Disc centering device for a disc drive
US5781374A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 17, 1996 |
| Grant date | Jul 14, 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 comprises a spindle motor assembly rotatable about a central axis. The spindle motor assembly has a spindle hub, which has at least one ring receiving portion. At least one information storage disc is stacked on the spindle hub and a resilient spacer ring is stacked on top of the information storage disc. A second resilient ring is located in the ring receiving portion of the spindle hub and is adjacent to the inner diameter of the information storage disc. A disc clamp is provided to apply an axial force to center and secure the information storage disc to the spindle hub, such that a portion of the axial force compresses the second resilient ring and forces the outer surface of the second resilient ring to apply a radial force to the information storage disc by radial expansion of the second resilient ring, and a portion of the axial force compresses the resilient spacer ring and forces the inner surface of the resilient spacer ring to apply a radial force to the second resilient ring by radial expansion of the resilient spacer ring, forcing the second resilient ring to further apply radial force to the information storage disc.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.