Cast baseplate for a disk drive having an arcuate shroud wall and adjacent arcuate groove
US8009384B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 30, 2008 |
| Grant date | Aug 30, 2011 |
| Priority date | — |
| Expiry date | Mar 17, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B25/043
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A disk drive includes a cast baseplate, and a disk having a major surface and an outer circumference. The cast baseplate includes a casting inlet gate region, a planar area underlying the disk, an arcuate shroud wall that is substantially orthogonal to the planar area, and an arcuate groove immediately adjacent the planar area. The planar area is separated from the disk major surface by less than 0.8 mm. The arcuate shroud wall is disposed less than 0.8 mm from the disk outer circumference, and includes a first shroud wall portion and a second shroud wall portion. The first shroud wall portion is more proximate to the casting inlet gate region than is the second shroud wall portion. The arcuate groove is immediately adjacent the first shroud wall portion, and defines a groove depth in the range 0.2 mm to 2 mm relative to the planar area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.