Ultrasonic driving device
US4894578A · kind A · utility
8Cited by
0References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 20, 1988 |
| Grant date | Jan 16, 1990 |
| Priority date | — |
| Expiry date | Jul 20, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02N2/103
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In the present invention, an electrode in both end portions of a piezoelectric vibrator is respectively divided in two, alternative current voltage is supplied to each of electrodes of the both end portions, whereby reversible circumferential progressive wave arises on the both end portions or side portion of a state consisting of the piezoelectric vibrator. A member to be driven is composed on each of the both end portions or the side portion of the stator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.