High efficiency ceiling fan

Details High efficiency ceiling fan High efficiency ceiling fan

2006-11-07

2006-11-07

Edgar, Richard A. (Department: 3745)

Fluid reaction surfaces (i.e., impellers)

Specific blade structure

Cantilever blade

C416S243000

Reexamination Certificate

active

07131819

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.

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patent: 676406 (1952-07-01), None
Merriam-Webster's Collegiate Dictionary, Tenth Edition, pp. 21a, 22a, 14 and 941.

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