Commutator for a motor and method of making the same
US4426594A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 4, 1981 |
| Grant date | Jan 17, 1984 |
| Priority date | — |
| Expiry date | Aug 4, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49011
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A commutator for a motor and a method of making the same wherein the motor has a stator and a rotor with a rotary shaft and the commutator consists of a plurality of commutator segments embedded in an insulating body, with each of the commutator segments having contact surfaces for engagement with a brush. The commutator is formed with a number of hemispherical shaped impressions so as to form a rough surface. A method of manufacturing the commutator comprises embedding a plurality of commutator segments in a body made of insulating material and the step of forming hemispherical impressions in the commutator segments by directing a jet of particles onto the surfaces of the commutator segments with a predetermined pressure so as to provide the desired roughened surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.