Vibration actuator
US5825118A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 30, 1997 |
| Grant date | Oct 20, 1998 |
| Priority date | — |
| Expiry date | May 30, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02N2/106
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A vibration actuator combines plural elastic members and vibration elements to generate torsional vibrations about an axis and longitudinal vibrations in an axial direction. The vibration actuator includes a fixed member passing through a hollow portion of a plurality of vibration elements and supports the vibration elements within a gap in an inner surface of the vibration elements. A combination of semicylindrical members generate a second order torsional vibration around the axis and a first order longitudinal vibration in the axial direction of the vibration actuator. The fixed shaft also passes through a hollow portion of the vibration element. The vibration element and the fixed shaft are affixed by a pin, thereby eliminating a need for a more restrictive connection with bolts. Thus, vibration restriction of the vibration actuator is enhanced and driving efficiency is increased.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.