Patent ID: 7896294

Claim:
A cover skin for a variable-shape aerodynamic area, the cover skin comprising: a deformable single-piece framework structure embedded in a layer of an elastic material, the framework structure being deformable in a first direction only and comprising: a plurality of regions that form elements; a plurality of regions that form joints, the plurality of regions that form elements being pivotably interconnected by respective ones of the plurality of regions that form joints; auxetic elementary cells being formed by a plurality of the regions that form elements being pivotably interconnected together by the respective ones of the plurality of regions that form joints such that the auxetic elementary cells deform auxetically when compressed and elongated in the first direction of the framework structure; and non-auxetic elementary cells formed by a plurality of the regions that form elements being pivotally interconnected together by the respective ones of the plurality of regions that form joints such that the non-auxetic elementary cells deform non-auxetically.