Ceiling fan blade

Details Ceiling fan blade Ceiling fan blade

2006-01-31

2006-01-31

Look, Edward K. (Department: 3745)

Fluid reaction surfaces (i.e., impellers)

Working member foldable, pivotable or collapsible to non-use...

C416S242000, C416S243000

Reexamination Certificate

active

06991431

ABSTRACT:
The present invention relates to a ceiling fan blade capable of producing full wind pressure and much wind. The solution of the present invention is to form a front and a rear wind receiving surfaces on the ceiling fan blade. A tangent angle of the rear wind-receiving surface is bigger than that of the front wind-receiving surface. A wavy wind guide surface is formed between the two wind receiving surfaces. The wavy wind guide surface and the two wind receiving surfaces can effectively increase the wind pressure and the wind; in addition, sinuous flow is substantially reduced when the blade is rotating.

REFERENCES:
patent: 1508086 (1924-09-01), Crawford
patent: 4776761 (1988-10-01), Diaz
patent: 4892460 (1990-01-01), Volk
patent: 5575624 (1996-11-01), Bogage
patent: 6302652 (2001-10-01), Roberts
patent: 2003/0190234 (2003-10-01), Huang
patent: 2004/0009070 (2004-01-01), Bird

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