Camera and piezo ceramic motor therefor
US7333724B2 · kind B2 · utility
4Cited by
16References
16Claims
0Family size
Inventor
Key dates
| Filing date | Aug 18, 2005 |
| Grant date | Feb 19, 2008 |
| Priority date | — |
| Expiry date | Dec 29, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10N30/2042
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A camera has an axially moveable cylinder retaining a lens and a piezo ceramic motor for axially moving the cylinder. The motor has a piezo ceramic drive member that incrementally advances the cylinder in response to the application of an electric potential and a piezo ceramic brake that locks the cylinder against movement. The drive member and the brake are alternately energized to advance the cylinder in a series of incremental steps.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.