High efficiency ceiling fan
US6719533B2 · kind B2 · utility
37Cited by
8References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 16, 2002 |
| Grant date | Apr 13, 2004 |
| Priority date | — |
| Expiry date | Aug 16, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S416/05
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Ceiling fan energy consumption efficiency is enhanced with fan blades that have an angle attack that decreases from root end to tip end at higher rates of decrease nearer their tip ends than at their root ends. Air flow distribution is enhanced with at least a portion of the blades having a dihedral that continuously increases. Efficiency on downdraft is also achieved with the blades having concave top and bottom surfaces.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.