Brush and brush housing arrangement to mitigate hydrodynamic brush lift in fluid-immersed electric motors
US8624464B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 21, 2010 |
| Grant date | Jan 7, 2014 |
| Priority date | — |
| Expiry date | Oct 29, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K5/148
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A brush and brush housing arrangement for use with an electric brushed motor containing viscous fluid. The brush and brush housing arrangement comprises a brush housing and at least one brush. The at least one brush comprising a first end that is in contact with a rotating commutator of the motor when in use and an opposed second end. At least one open-faced channel in a surface of the brush extends from the first end to the second end. The open-faced channel provides an exit for entrained fluid from the brush and brush housing, minimizing or eliminating brush lift caused by fluid being forced between the rotating commutator and the brush. Additional pressure relief channels for allowing escape of entrained fluid may be located in the housing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.