Lightweight fan

Details Lightweight fan Lightweight fan

1976-08-30

1977-09-27

Powell, Jr., Everette A.

Fluid reaction surfaces (i.e., impellers)

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

Sectional, staged or nonrigid working member

416210R, 416DIG3, F04D 2934

Patent

active

040508471

ABSTRACT:
A fan blade, secured to an arm of the fan, extends radially outwardly beyond the arm and is secured to the arm by a plurality of rivets, a continuous circular rib being formed about the radially outermost rivet, the rib comprising on one side of the blade a groove having a depth and a cross-sectional radius equal to the blade material thickness.

REFERENCES:
patent: 1313598 (1919-08-01), Ingells
patent: 1352848 (1920-09-01), Stanyo
patent: 1634554 (1927-07-01), Pajalic
patent: 2794509 (1957-06-01), Mix
patent: 2912159 (1959-11-01), Granger et al.
patent: 2965180 (1960-12-01), Killam
patent: 3628888 (1971-12-01), Wooden

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