Brush holder assemblies for small electric motors
US4246508A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 22, 1978 |
| Grant date | Jan 20, 1981 |
| Priority date | — |
| Expiry date | Dec 22, 1998 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01R39/58
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Brush holder assemblies are disclosed which prevent the spring, or conductor and terminal connector from protruding out of the brush holder and damaging the motor commutator. The constructions employ a brush housing having a restraining bridge at the front end thereof and a terminal connector having a rearwardly extending flange. As the brush wears down, it and the terminal connector to which it is attached move forwardly in the brush housing under bias of a coil spring. Upon striking the restraining bridge the terminal connector pivots forwardly under tension of the spring thereby wedging the flange against the top of the housing preventing further movement of the brush assembly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.