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US 2013/0280084 A1Published application
Propeller blade with internal stiffener
AssigneeHamilton Sundstrand Corporation
InventorsDavid P. Nagle, Paul A. Carvalho
Life of this patent
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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.
Claims15
A propeller blade comprising:
- 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.
1 more element
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 hole;
- folding the internal stiffener such that it includes at 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.
4 more elements
Dependencies are inferred from the claim text.