Spiral piezoelectric rotary actuator
US4435667A · kind A · utility
36Cited by
4References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 28, 1982 |
| Grant date | Mar 6, 1984 |
| Priority date | — |
| Expiry date | Apr 28, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S310/80
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A piezoelectric rotary actuator including: a rotatable member; a spiral member fixed at its inner end to the rotatable member; one or more piezoelectric layers attached on one or both sides of the spiral member; means for rotatably supporting the rotatable member relative to the outer portion of the spiral member; and an electrode for applying a voltage across the piezoelectric layer or layers, to bend the spiral and rotate the rotatable member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.