Disk clamp for disk recording apparatus and disk recording apparatus
US6785090B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 23, 2001 |
| Grant date | Aug 31, 2004 |
| Priority date | — |
| Expiry date | Jun 5, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B17/038
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A disk clamp has a data position in a recording track that is resistant to positional deviations even after temperature cycling is conducted. The distribution of data positions can be centered in the vicinity of the center position. A disk top clamp and hub are made from materials that are stable in terms of chemical properties over a temperature range in which the disk recording apparatus is used and have such a coefficient of elasticity that a clamping force required to clamp the recording disks while the disk recording apparatus is in use can be obtained from the tightening force to tighten the screws. The material of the top clamp and the hub has a thermal expansion coefficient that is close to that of the recording disk.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.