Propeller fan construction

Details Propeller fan construction Propeller fan construction

1975-11-26

1977-05-24

Powell, Jr., Everette A.

Fluid reaction surfaces (i.e., impellers)

With weight-balancing means

416236R, 416DIG3, F04D 2938

Patent

active

040252310

ABSTRACT:
A propeller fan construction is provided in which the impeller thereof includes a spider member having a plurality of symmetrically arranged planar marginal portions, and a plurality of blades projecting outwardly from the spider member. Each blade has an inner end provided with a planar segment which is fixedly mounted on a planar marginal portion of the spider member. The spider member and each of the blades are formed of sheet material. Each blade is provided with an elongated embossment extending from one elongated edge of the blade in an angular direction relative to the longitudinal axis of the blade. The embossment is position between the outer end of the blade and the planar segment of the inner end.

REFERENCES:
patent: 1313598 (1919-08-01), Ingells
patent: 1352848 (1920-09-01), Stanyo
patent: 1634554 (1927-07-01), Pajalic
patent: 1806539 (1931-05-01), Cram
patent: 1868528 (1932-07-01), Gardner
patent: 2581873 (1952-01-01), Morrison
patent: 2794509 (1957-06-01), Mix
patent: 2965180 (1960-12-01), Killam
patent: 3315750 (1967-04-01), Delaney
patent: 3910718 (1975-10-01), MacEwen et al.

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