Replaceable friction coupling for piezoelectric motors
US7119477B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 31, 1999 |
| Grant date | Oct 10, 2006 |
| Priority date | — |
| Expiry date | Oct 31, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02N2/007
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A piezoelectric motor comprising: a piezoelectric vibrator (50) having a surface comprising a localized non-planar shaped first surface region thereon which first surface region has a shape different from the shape of the surface on which it is located; and a friction nub (52) formed with a second surface region that is substantially a negative relief of the first surface region, which first and second regions are bonded together. Preferably the friction nub (52) is detachably mounted to the vibrator (50) via a boss (54) waving a protuberance (56) of conical shape. Alternatively the friction nub (52) has a protuberance (76) which is form-fitted to a recess (72) in the vibrator (50) or boss (70), respectively. First and second surface regions can also be threading surfaces.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.