Commutator
US8115363B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 9, 2009 |
| Grant date | Feb 14, 2012 |
| Priority date | — |
| Expiry date | Jun 17, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01R43/08
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A commutator 10 comprises an electrically non-conductive base 12; and a plurality of electrically conducting segments 16 supported by the base 12. Each segment 16 comprising a first electrically conductive inner layer 18 provided on the base 12, and a second electrically conductive outer layer 20 fixed to the inner layer 18. The inner and outer layers 18, 20 have opposing surfaces 21, 22 which abut each other, once the commutator is assembled. An opening, preferably being a recess 30, for receiving flux and/or air during the fixing of the outer layer to the inner layer is provided in at least one of the opposing surfaces 21, 22. There is also provided a DC electric motor which includes such a commutator 10.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.