Vibration driven motor
US5723935A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 10, 1996 |
| Grant date | Mar 3, 1998 |
| Priority date | — |
| Expiry date | Jun 10, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02N2/0045
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A vibration driven motor can be driven with high torque at high rotation, and has a simple structure that can be manufactured easily. The motor may comprise a stator in a cylindrical form, a rotor disposed on the end surface of the stator and a pressing member for pressing the rotor on the stator with pressure, the stator may include a first piezoelectric electro-mechanical converting element for generating torsional vibration around the axis of the stator, a second electro-mechanical converting element for generating longitudinal vibration in the axial direction of the stator, and a pair of substantially semi-cylindrical vibration members, and the first or second piezoelectric element may be one or more plate-like members sandwiched by the vibration members of the stator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.