Ultrasonic driving device
US4975614A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 23, 1989 |
| Grant date | Dec 4, 1990 |
| Priority date | — |
| Expiry date | Aug 23, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02N2/123
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A stator includes piezoelectric vibrators of piezoelectric ceramic put between a long metal block and a short metal block, which are fixed with screw threads at opposite ends of a bolt. When a high frequency alternating current voltage is applied to the piezoelectric vibrators, elliptic compounded vibration, progressive vibration and so on, which is torsional vibration due to the screw threads of the bolt compounded with longitudinal vibration due to the expansion and contraction of the piezoelectric vibrators, is generated on the end surface and the side surface of the stator. A driven member is engaged on the end surface or the side surface of the stator and is driven by the elliptic vibration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.