Fan and shroud assembly
US7481615B2 · kind B2 · utility
12Cited by
8References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 27, 2006 |
| Grant date | Jan 27, 2009 |
| Priority date | — |
| Expiry date | Jan 17, 2027 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04D29/545
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A fan and shroud assembly has a rotatable hub and plural blades extending outward from the hub. A shroud surrounding the fan controls air blast resulting from rotation of the fan. The shroud includes a guide ring spaced a predetermined distance from the periphery of the fan. The ends of the blades are connected together. The guide ring includes continuous circular undulations having alternate differing radii of curvature to reduce air swirl along the periphery of the fan. The undulations surround the fan periphery.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.