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US 9,168,999 B2Granted
Propeller blade with internal stiffener
AssigneeHamilton Sundstrand Corporation
InventorsDavid P. Nagle, Paul A. Carvalho
Life of this patent
Estimating the term…
Abstract
A propeller blade includes a foam core having a slot formed through it from a camber side to a face side, an internal stiffener disposed through the slot and including flanges in contact with both the camber and face sides and a structural layer that surrounds at least a portion of the foam core and in contact with the flanges on both the camber and face sides.
Claims8
A method of forming a propeller blade comprising:
- providing a mold;
- forming a foam core in the mold that includes a face side and a camber side;
- forming a slot through the foam core that connects the face side and the camber side;
- placing an internal stiffener through the slot;
- folding the internal stiffener such that it includes a face flange that contacts the face side of the foam core and a camber flange that contacts the camber side of the foam core;
- and
- forming a structural layer that surrounds the foam core and contacts face and camber flanges;
- wherein the internal stiffener is folded after being placed through the slot.
5 more elements
Dependencies are inferred from the claim text.