Magnetic speed reduction device
US4684836A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 2, 1986 |
| Grant date | Aug 4, 1987 |
| Priority date | — |
| Expiry date | Jul 2, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S74/04
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A magnetic speed device includes a rotatable driving shaft and a driven shaft also rotatable about an axis. A stationary pole includes a plurality of pole elements, each having at least one stationary pole surface. The pole elements are circumferentially arranged around the axis. A rotor is operatively coupled to the driven shaft for rotation with the driven shaft about the axis. The rotor includes a plurality of circumferentially arranged rotor pole surfaces. The number of rotor pole surfaces is different from the number of stationary pole surfaces. The rotor pole surfaces are disposed in a spaced, generally opposed relation to the stationary pole surfaces, and define a series of air gaps therebeween. A magnet is mounted for rotation with the driving shaft for supplying a magnetic flux to a flux path which includes successive, adjacent pairs of pole elements, the rotor, and the air gaps. Rotation of the driving shaft produces rotation of the driven shaft at a speed which is less than that of the driving shaft.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.