Noiseless self-ventilated motor, in particular for a railway vehicle
US10971968B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 5, 2018 |
| Grant date | Apr 6, 2021 |
| Priority date | — |
| Expiry date | May 30, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K5/04
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The self-ventilated motor (10) comprises a casing (12) having an air inlet opening (18) and an air outlet opening (20) and delimiting an air passage between the air inlet opening (18) and the air outlet opening (20), drive means (13) comprising a shaft (22) housed in the casing (12), a ventilation propeller (24) connected to the shaft (22) upon rotation and housed in the air passage, and a noise reduction device (26). The noise reduction device (26) comprises a first noise reduction member (28), attached to the casing (12) at the air inlet opening (18), a second noise reduction member (30) arranged on the ventilation propeller (24), and a third noise reduction member (32) fixed to the casing (12) at the air outlet opening (20).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.