Ultrasonic driving device
US4893047A · kind A · utility
14Cited by
3References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 14, 1988 |
| Grant date | Jan 9, 1990 |
| Priority date | — |
| Expiry date | Sep 14, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10N30/2027
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A stator consists of a cylindrical piezoelectric vibrator and electrodes respectively divided in two in its inside and outside portions. When alternative current voltage is applied to respective one of divided electrodes in the inside and outside portions, reversible progressive waves generate on the end and side portions of the stator. When a rotary member is combined with the end or side portion of the stator, the rotary member can reversibly be moved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.