Vane air motor with eccentric adjustment ring and bearing ring for vane ends
US4177024A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 5, 1977 |
| Grant date | Dec 4, 1979 |
| Priority date | — |
| Expiry date | May 5, 1997 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01C20/22
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A pneumatically operated vane-type motor for driving medical or dental handpieces. A housing forms a rotor chamber in which a rotor is mounted, the rotor having axial slots in which radially moveable vanes are housed. An adjustment ring is positioned between the inner surface of the housing and the outer ends of the vanes, and is moveable to adjust the speed and torque characteristics of the rotor without requiring adjustment in the compressed air supply. To this end, the adjustment ring has a cylindrical outer surface engaging the inner surface of the housing, and a cylindrical inner surface towards which the vanes extend. The axes of the inner and outer surfaces of the adjustment ring are spaced-apart.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.