Fine drive and positioning units and memory apparatus
US6362938B1 · kind B1 · utility
13Cited by
9References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 23, 1999 |
| Grant date | Mar 26, 2002 |
| Priority date | — |
| Expiry date | Sep 23, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/5552
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A fine drive unit comprises a suspension arm having a head portion and a support member supporting the suspension arm for undergoing pivotal movement. The support member has a coupling portion connected to the suspension arm, a spring portion connected to the coupling portion, at least one pair of bi-directional cantilevers, and piezoelectric members each disposed on a respective one of the cantilevers. When a voltage having a preselected frequency is applied to the piezoelectric members, the cantilevers are vibrated to cause the cantilevers to contact the suspension arm and thereby finely drive the head portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.