Electric motor
US3953750A · kind A · utility
3Cited by
2References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 20, 1974 |
| Grant date | Apr 27, 1976 |
| Priority date | — |
| Expiry date | Dec 20, 1994 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K1/17
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A direct current permanent magnet electric motor is disclosed which comprises a hollow rotatable armature, magnet means mounted concentrically with and spaced radially from the armature, and one or more pairs of pole pieces which directly contact opposite ends of the magnet means and are shaped so that they extend longitudinally or axially between the magnet means and the armature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.