Enclosed disc drive with improved air flow
US4369475A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 13, 1981 |
| Grant date | Jan 18, 1983 |
| Priority date | — |
| Expiry date | Apr 13, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B23/021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An enclosure for a sealed disc drive includes a bottom support member and a top cover for mating with the bottom support member. The bottom support member includes a filter mounted on the inner surface and in a peripheral position thereof, and air guide means for directing air flow created by a spinning disc through the filter, the cover includes a second breather filter through which outside air can enter the enclosure. Air cleanliness within the enclosure is improved by providing a positive air pressure differential between the space below an enclosed disc and in the proximity of the spindle bearing seals and the space above the enclosed disc. The positive air pressure differential can be created by obstructing air flow below the disc.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.