Windage suppression device and associated method for a retractable air flow control
US6937433B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 2, 2002 |
| Grant date | Aug 30, 2005 |
| Priority date | — |
| Expiry date | Apr 6, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B25/043
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An air flow control device for reducing turbulence on a rotating multi-disc stack. Air flow control device includes a first air dam having cavities formed by a series of alternating plate sections forming gaps therebetween adjacent plates. Gaps define cavities capable of receiving discs when disc stack is rotating. A method for writing data onto an annular writeable surface of a plurality of discs including the steps of mounting the plurality of discs into a coaxial stack, extending one or more dam plates each between a consecutive pair of the plurality of discs and adjacent at least a selected one of the writeable surfaces; and writing data onto the selected surface while a first one of the dam plates overlaps enough of the selected surface so that the first dam plate limits a windage-induced error in the written data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.