Stator and ceramic tube type ultrasonic motor using the same
US7312559B2 · kind B2 · utility
7Cited by
7References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 8, 2006 |
| Grant date | Dec 25, 2007 |
| Priority date | — |
| Expiry date | Aug 8, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02N2/0015
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a ceramic tube type ultrasonic motor having a stator including a tube-type elastic body that is formed of a ceramic material; and a plurality of piezoelectric diaphragms that are attached on the outer peripheral surface of the elastic body in a longitudinal direction thereof and to which voltages having a phase difference are respectively applied and a rotor that is rotated by the friction with the elastic body flexurally vibrating due to the voltages applied to the plurality of piezoelectric diaphragms.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.