Motor having breathing hole
US7615902B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 31, 2007 |
| Grant date | Nov 10, 2009 |
| Priority date | — |
| Expiry date | Apr 30, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/2186
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A motor includes: a motor element with a rotation shaft; a speed reduction element having a rotation speed reduction device for reducing a rotation speed and a gear housing for accommodating the reduction device; and a water proof sheet. The gear housing includes: an accommodation portion having a communication passage and an accommodation concavity; and a cover having a breathing hole. The breathing hole has a cover side opening, which connects to an accommodation side opening of the communication passage. An inside of the motor element is connected to an outside of the gear housing through the breathing hole and the communication passage. The cover seals an opening of the accommodation concavity. The water proof sheet having water proof property and gas permeability is disposed between the accommodation side opening and the cover side opening.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.