Fluid dynamic bearing device and motor including the device
US7011450B2 · kind B2 · utility
4Cited by
7References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 1, 2003 |
| Grant date | Mar 14, 2006 |
| Priority date | — |
| Expiry date | Jun 6, 2024 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C2370/12
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A fluid dynamic bearing device including a shaft having an interior pressure regulating hole by which a center portion of a thrust surface confronting a thrust plate and a lubricant pool portion of an inner circumferential surface of a sleeve are communicated with each other. Thus, the device is capable of obtaining stable thrust floating characteristics and preventing leaks of the lubricant as well as exhaustion of the lubricant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.