Pneumatic laminar motor for dental use
US4225308A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 15, 1979 |
| Grant date | Sep 30, 1980 |
| Priority date | — |
| Expiry date | May 15, 1999 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01C1/348
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A pneumatic laminar motor, for dental purposes, having a sleeve-like housing forming the stator with circular cylindrical inside wall and a rotor inside touching that wall. The rotor has a diameter smaller than the inside wall and its rotary axis is parallel to, but displaced from the axis of the inside wall. The lengthwise slots of the rotor has radially movable lamellas with their outer ends pointing to the inside wall. An air inlet opening from the air supply conduit and an air outlet opening discharge into the space between rotor and inside wall. A freely rotating bearing ring is located between the inside wall and the outer ends of the lamellas and is coaxial with the inside wall. The outer ends of the lamellas contact the bearing ring. Compressed air enters through the air inlet opening into the space between rotor and inside wall and pushes the nearest lamella ahead of it to turn the motor. The bearing ring is divided into two bearing ring sections with an annular space between them, with the rotor being fastened rotation-proof to the bearing ring sections. The air inlet opening discharges into the annular space.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.