Spinstand for testing magnetic heads and disks
US6229303A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 19, 1998 |
| Grant date | May 8, 2001 |
| Priority date | — |
| Expiry date | Mar 19, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/001
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A shroud of suitable shape is provided about the spindle and disk(s) of a spinstand. The shroud operates to reduce or eliminate air flow at the top and bottom surfaces of the disk(s) and limits the air volume moved by the rotating disk(s). The shroud also directs the air in a circular path around the spindle center. As a result, vortexes in the air surrounding the disks are significantly reduced, thereby decreasing the vibrations of the disk(s) and the heads and decreasing track misregistration. The shroud also reduces the heat exchange between the ambient air and the magnetic disk(s), which in turn reduces the thermal expansion of the disk(s) and thus decreases the track misregistration further. The shroud also provides electromagnetic shielding for the disk(s) and head(s) installed on the spinstand and thus increases the quality of the signal read from the magnetic disk(s). Since the shroud covers the rotating disk(s), it also reduces the risk of operator injury due to the magnetic disk(s) breaking or becoming detached from the spindle, and it reduces the risk of accidental contact of the operator with the heads and disks, thus decreasing the chance of contamination. The shroud c…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.