Aerodynamically and acoustically improved car fan
US10584716B2 · kind B2 · utility
1Cited by
2References
18Claims
0Family size
Inventors
Key dates
| Filing date | Mar 21, 2016 |
| Grant date | Mar 10, 2020 |
| Priority date | — |
| Expiry date | Mar 21, 2036 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04D29/326
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A ventilation blower wheel may have a hub and blades extending radially outwards from the hub between a blade root and a blade tip. Additionally, the blades of said blower wheel may have a backward/forward curvature as a result of a reversal in curvature along their span. Furthermore, said blades may have, between 20% and 80% along their span, at least one pitch variation, extending over a maximum span distance of 25%, of at least 2° more or less than a linear pitch over said span distance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.