Drive unit
US8004151B2 · kind B2 · utility
2Cited by
5References
1Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 2, 2010 |
| Grant date | Aug 23, 2011 |
| Priority date | — |
| Expiry date | Jul 2, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02N2/103
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A drive unit includes an ultrasonic actuator having an actuator body generating vibration, and diver elements attached to the actuator body to output drive force by generating orbit motion in response to the vibration of the actuator body; and a movable body contacting the driver elements, and relatively moving with respect to the ultrasonic actuator. In a surface of the movable body, which contacts the driver elements, smoothed portions are interleaved with recessed portions which are recessed with respect to the smoothed portions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.