Automotive cooling fan with biased flexible blades

Details Automotive cooling fan with biased flexible blades Automotive cooling fan with biased flexible blades

1977-10-19

1979-04-03

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

041474716

ABSTRACT:
A flexible bladed automotive cooling fan comprising biasing members biasing both the upstream and downstream sides of th blades including a root portion of the upstream biasing member extending beyond the remainder of both biasing members, the blade thereby having a substantially increased natural frequency and a reduced amplitude of vibration at resonance as well as an improved airfoil configuration.

REFERENCES:
patent: 3679321 (1972-07-01), Strick
patent: 3773435 (1973-11-01), Wooden
patent: 3836284 (1974-09-01), DeJong
patent: 3910718 (1975-10-01), MacEwen et al.
patent: 4012168 (1977-03-01), Spellman

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