Fan blade with bends forming general blade curvature

Details Fan blade with bends forming general blade curvature Fan blade with bends forming general blade curvature

1978-03-15

1979-12-04

Powell, Jr., Everette A.

Fluid reaction surfaces (i.e., impellers)

Articulated, resiliently mounted or self-shifting impeller...

Sectional, staged or nonrigid working member

416240, 416DIG3, F04D 2938

Patent

active

041770129

ABSTRACT:
An automotive cooling fan having flexible, resilient blades which decamber with increasing rotational speed of the fan, the general curvature of the blades being formed by a multiplicity of spaced, generally radially extending bends in the blades; in preferred embodiments the blades have configuration resulting from said bends in which the general radius of blade curvature of the blades increases and the chord angle of the blades decreases from the blade roots to the blade tips.

REFERENCES:
patent: 3490686 (1970-01-01), Weir
patent: 3910718 (1975-10-01), MacEwen et al.
patent: 3914069 (1975-10-01), Arrington et al.
patent: 4037987 (1977-07-01), Charles et al.

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