Lightweight fan
AssigneeFram Corporation
InventorsGordon R. A. New, William G. Curry
Life of this patent
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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.
Claims9
In a fan comprising a hub having a plurality of arms extending radially therefrom and a fan blade connected by rivets to each said arm and extending radially outwardly therefrom, said rivets located at positions radially spaced along each said arm and blade and the radially outermost of said rivets bearing directly against said blade, the improvement in which said fan blade has a circular rib formed therein extending about said radially outermost rivet and closely adjacent the head of the radially outermost rivet securing said blade to a said arm.
Dependencies are inferred from the claim text.