Vibration wave driven motor
US5128580A · kind A · utility
19Cited by
9References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 2, 1991 |
| Grant date | Jul 7, 1992 |
| Priority date | — |
| Expiry date | Apr 2, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02N2/08
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In a vibration wave driven motor, an elastic body of an elliptic shape is provided where different degrees of stiffness or rigidity are available with the arcuate portions and the straight portions, and the ratio between the distortion energy and the vibration energy that part in the generation of the natural frequency for the A vibration mode is arranged virtually equal to that ratio for the B vibration mode, thus enabling the matching of frequencies for both A and B modes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.