Axial fan having plastic blades

Details Axial fan having plastic blades Axial fan having plastic blades

1993-10-12

1995-05-30

Look, Edward K.

Fluid reaction surfaces (i.e., impellers)

With weight-balancing means

416229R, 416241A, F04D 2932

Patent

active

054196825

ABSTRACT:
The invention is directed to an axial fan having a hub and including an annular flange and a plurality of fan blade units distributed in spaced relationship about the periphery of the annular flange. Each of the fan blade units includes a base portion defining a hub component and a fan blade extending outwardly from the base portion. The hub components are disposed in spaced relationship one next to the other around the periphery of the annular flange to define the hub of the axial fan and so as to cause each two mutually adjacent ones of the hub components to be separated from each other and to define a gap therebetween. Each of the fan blade units is a single piece injection molded onto the annular flange.

REFERENCES:
patent: 2573875 (1951-11-01), Riddiford
patent: 3161239 (1964-12-01), Andersen
patent: 3749519 (1973-07-01), Ryba
patent: 4153389 (1979-05-01), Boyd
patent: 4169693 (1979-10-01), Brubaker

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