Ceramic disc-drive actuator
US5682076A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 19, 1995 |
| Grant date | Oct 28, 1997 |
| Priority date | — |
| Expiry date | Jan 19, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10N30/2023
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A paired piezoelectric micromotor for providing motion relative to a body, including two rectangular piezoelectric plates, each piezoelectric plate having first and second long edges, first and second short edges, front and back faces, electrodes attached to the front and back faces thereof and a ceramic spacer attached to the first long edge at the end thereof near the first short edge, the ceramic spacer engaging a surface of the body. The first short edge of the first plate is adjacent and substantially parallel to the first short edge of the second plate. Resilient force is applied to a portion of each plate, pressing the ceramic spacer against the surface of the body. A voltage source electrifies at least some of the electrodes with an excitation voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.