Top cover attachable fluid dynamic bearing motor
US6917130B2 · kind B2 · utility
11Cited by
17References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 16, 2003 |
| Grant date | Jul 12, 2005 |
| Priority date | — |
| Expiry date | Feb 12, 2023 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C2370/12
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A single thrust bearing fluid dynamic bearing (FDB) design, including a typical dynamic bearing design which has a ring-shaped or circular thrust plate mounted at or near the end of a shaft, wherein the shaft defines together with the surrounding sleeve a journal bearing by providing grooves on one of the two surfaces facing the gap between the shaft and sleeve. On the thrust plate, only one of the two surfaces is grooved to establish an active thrust bearing. The rotor is then biased against the single active thrust bearing with a constant force generated by a magnetic circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.