Fan

Details Fan Fan

2004-09-24

2008-11-11

Nguyen, Ninh H (Department: 3745)

Fluid reaction surfaces (i.e., impellers)

Specific blade structure

Integrally shaped or blended into hub

C416S24100B, C416S24400R, C029S889100

Reexamination Certificate

active

07448856

ABSTRACT:
A fan assembly has a central metallic element and a polymeric fan. The polymeric fan has a hub carrying the central metallic element and has a plurality of blades extending from the hub. The central metallic element has a central longitudinal aperture and a lateral surface. The central metallic element lateral surface is of substantially uniform substantially square section along a majority of a length of the central metallic element.

REFERENCES:
patent: 2454200 (1948-11-01), Perkins
patent: 3061342 (1962-10-01), Feller

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