Vibration wave motor
US4926085A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 3, 1989 |
| Grant date | May 15, 1990 |
| Priority date | — |
| Expiry date | May 3, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02N2/007
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A vibration wave motor which produces a relative movement between a vibrator and a member which is in contact with the vibrator via friction surfaces by means of a traveling vibration wave produced in the vibrator. In the motor, a friction surface of either one of the vibrator and frictional member is made of a material subjected to a hard alumite processing, and at least a friction surface of another one of the vibrator and frictional member is made of an ultrahard material consisting of a nickel-phosphorus-base alloy which contains at least one kind of material selected from the group consisting of silicon carbide, boron carbide, titanium boride and boron nitride.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.