Motor device
US6844643B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 6, 2002 |
| Grant date | Jan 18, 2005 |
| Priority date | — |
| Expiry date | Mar 14, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P8/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A motor device including a pair of motor units and a driven member meshed with rotary gears of the pair of motor units to drive the driven member, the motor units each including a rotary magnet that is cylindrical and magnetized so as to have different magnetic poles in turn along the circumferential direction, a rotary gear having a plurality of teeth, the rotary gear rotating about the rotation axis of the rotary magnet together with the rotary magnet, and a stator member having a plurality of outer magnetic poles that are arranged on the outer periphery of the rotary magnet and an inner magnetic pole that is arranged on the inner periphery of the rotary magnet and is opposed to the outer magnetic poles, the plural outer magnetic poles and the inner magnetic pole being excited by a coil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.