Brush gear for an electric motor
US5814915A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 4, 1996 |
| Grant date | Sep 29, 1998 |
| Priority date | — |
| Expiry date | Oct 4, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01R39/39
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A miniature electric motor having a wound rotor uses brush gear 20 comprising strips 23 formed from flexible printed circuit board material 22 having a conductive layer 24 and a supporting layer 25. The conductive layer 24 is electrically connected to motor terminals 19 and to a contact portion 26 arranged for making sliding contact with a commutator of the motor. The contact portion 26 of the brush 21 may be coated with a precious metal for contact or corrosion resistance requirements. The backing material 25, preferably polyimide, is chosen of a desired thickness to provide strength, resilience and vibration damping characteristics while remaining flexible.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.