Hydrodynamic bearing device, and spindle motor and information device using the same
US7776802B2 · kind B2 · utility
5Cited by
4References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 6, 2005 |
| Grant date | Aug 17, 2010 |
| Priority date | — |
| Expiry date | Jun 6, 2027 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2040/02
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The invention provides a hydrodynamic bearing device including at least one of a shaft structure and a sleeve having a dynamic pressure-generating mechanism, and a lubricant present in a gap between the shaft structure and the sleeve. The lubricant contains a diester with a total carbon number of 20-28 obtainable by a divalent alcohol that has at least one ether bond, and one or more types of C6 to C10 saturated monovalent fatty acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.