High efficiency ceiling fan
US6733241B2 · kind B2 · utility
32Cited by
8References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 11, 2002 |
| Grant date | May 11, 2004 |
| Priority date | — |
| Expiry date | Jul 24, 2022 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04D29/384
- 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.