Spark suppression dust sealing for a motor apparatus
US6417595B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | May 24, 2000 |
| Grant date | Jul 9, 2002 |
| Priority date | — |
| Expiry date | May 24, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K5/148
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In one embodiment of the present invention, an electric motor is provided. A component of the electric motor, the commutator assembly, has a commutator and a brush assembly. The brush assembly encloses conductive brushes that are in contact with the commutator. A shaft is rotatably mounted about an axis, and a bearing is disposed around the shaft. The commutator is connected to the shaft, and a first seal surrounds the commutator. The first seal substantially isolates the commutator assembly from the internal ambient atmosphere of the electric motor. Further, a second seal substantially isolates the shaft and the bearing from the commutator and the conductive brushes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.