Twisted flex fan

Details Twisted flex fan Twisted flex fan

1975-05-12

1977-03-15

Powell, Jr., Everette A.

Fluid reaction surfaces (i.e., impellers)

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

Sectional, staged or nonrigid working member

416240, F04D 2938

Patent

active

040121682

ABSTRACT:
A fan blade construction for an automobile cooling system. The twist angle of the blade, as measured by the rotation of an imaginary line joining the leading and trailing edges, varies linearly or non-linearly along the length of the blade, the leading edge of the blade is rigid and the trailing edge of the blade is flexible. In another embodiment, the fan blade is resiliently biased against a portion of its mounting arm to inhibit flutter.

REFERENCES:
patent: 1444923 (1923-02-01), Kempton
patent: 1868528 (1932-07-01), Garder
patent: 2460902 (1949-02-01), Odor
patent: 2468723 (1949-04-01), Bartlett
patent: 3406760 (1968-10-01), Weir
patent: 3679321 (1972-07-01), Strick
patent: 3759630 (1973-09-01), Freeman et al.
patent: 3799697 (1974-03-01), De Jong
patent: 3827826 (1974-08-01), Strick
patent: 3910718 (1975-10-01), MacEwen et al.

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