Molded commutator with a layer of insulation on the base
US5003212A · kind A · utility
38Cited by
13References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 5, 1989 |
| Grant date | Mar 26, 1991 |
| Priority date | — |
| Expiry date | Oct 5, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01R39/04
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An improved commutator for an electric motor and a method of making the same wherein the outer surface of a commutator sleeve molded of a synthetic resin is coated with an insulating coating layer of an electrically insulating coating material. The molded commutator sleeve thus coated is protected from oxidative degradation and cracking which would otherwise result in removal of a commutator bar and insulation failure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.