Surface acoustic wave actuator, and magnetic disk device and optical disk device using the same
US6285113A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 20, 2000 |
| Grant date | Sep 4, 2001 |
| Priority date | — |
| Expiry date | Jul 20, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02N1/008
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A surface acoustic wave actuator is disclosed which includes unidirectional interdigital transducers disposed on both sides of a vibrator and an electrical combiner. One of the unidirectional interdigital transducers and external power supply are connected to an input port, and the other unidirectional interdigital transducer is connected to an output port of the electrical combiner. The electrical combiner combines input energy from an external power supply and surface acoustic wave energy is electrically converted by one of the unidirectional interdigital transducers, and input to the other unidirectional interdigital transducer. Surface acoustic waves excited by the other unidirectional interdigital transducer propagates on a vibrator, and is input to the other unidirectional interdigital transducer again after passing one unidirectional interdigital transducer and the electrical combiner. A relative movement member is pressed against the vibrator for generating driving force via a friction force so that the relative movement member implements relative movement to the vibrator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.