Disk drive including a balancing element with first and second cavities and a cylindrical portion disposed about a spindle motor hub
US7529064B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 21, 2005 |
| Grant date | May 5, 2009 |
| Priority date | — |
| Expiry date | Aug 16, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B19/2027
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A disk drive includes a base, and a spindle motor coupled to the base. The spindle motor includes a hub defining an axis of rotation. The disk drive further includes a disk disposed about the hub and including a disk inner diameter biased against the hub at a contact location of the hub. The disk drive further includes a balancing element including a cylindrical portion disposed about the hub. The balancing element further includes a first cavity defining a first cavity centroid disposed on a same side of the axis of rotation as the contact location, and a second cavity defining a second cavity centroid disposed on a side of the axis of rotation opposite the first cavity centroid. The second cavity centroid is spaced apart from the first cavity centroid in a direction along the axis of rotation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.