Motor device
US6559569B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 17, 2001 |
| Grant date | May 6, 2003 |
| Priority date | — |
| Expiry date | Apr 17, 2021 |
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 a plurality of inner magnetic poles that are arranged on the inner periphery of the rotary magnet and are opposed to the outer magnetic poles, the plural outer magnetic poles and the plural inner magnetic poles being excited by a coil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.