Ceiling fan blade configuration having a concave blade periphery

Details Ceiling fan blade configuration having a concave blade periphery Ceiling fan blade configuration having a concave blade periphery

1995-08-03

1996-09-10

Look, Edward K.

Fluid reaction surfaces (i.e., impellers)

Specific blade structure

Irregular, flanged or channel forming blade surface

416237, 416243, F04D 2938

Patent

active

055540066

ABSTRACT:
A ceiling fan blade includes a peripheral portion having two side portions and an end portion. The side portions and the end portion each includes either a concave surface or a tapered surface for decreasing a resistance to the relative wind to the ceiling fan blade and for facilitating the air circulating effect of the ceiling fan blade.

REFERENCES:
patent: 170893 (1875-12-01), Patterson
patent: 201650 (1878-03-01), Capern
patent: 225493 (1880-03-01), Sherry
patent: 1544134 (1925-06-01), David
patent: 1597175 (1926-08-01), Boening
patent: 4632636 (1986-12-01), Smith

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