Fluid dynamic bearing and magnetic disk apparatus
US7014366B2 · kind B2 · utility
2Cited by
1References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 4, 2003 |
| Grant date | Mar 21, 2006 |
| Priority date | — |
| Expiry date | Jul 27, 2024 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C2370/12
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
In the present invention, in order to provide a fluid dynamic bearing, having heat resistance, wherein the electrical charging on a rotation portion is prevented and the torque loss caused by a lubricant is made lower, an ionic liquid or the like is added to the lubricant filled in the clearance between the opposed faces of a shaft and a sleeve unit as an electrical conductivity imparting agent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.