Patent ID: 7669799
Filing Date: 2010-03-02
Classification: B32B,C22F,F03G,Y10T

Abstract:
1. A multifunctional member adapted for reversible structural deformation from a first shape to a second shape, the multifunctional member comprising: a first active member, said first active member adapted to contract if exposed to a temperature above a first transition temperature range; a second active member, said second active member adapted to contract if exposed to a temperature above a second transition temperature range; at least one core member, wherein said first and second active members are connected to opposite sides of said core member; at least one heat source operatively connected to said first and second active members to expose said first and second active members to said first and second temperatures, respectively; wherein said first and second active members are operable to alter the shape of the multifunctional member between said first and second shapes, wherein: said first active member contracts while above said first transition temperature range causing said at least one core member to bend out-of-plane and thereby causing said second active member to expand, whereby said multifunctional member assumes said first shape; said second active member contracts while above said second transition temperature range causing said at least one core member to bend out-of-plane and thereby causing said first active member to expand, whereby said multifunctional member assumes said second shape; wherein said multifunctional member retains each of said first and second shapes after exposure to said first and second temperatures by said at least one heat source has been stopped; and wherein said core is comprised of at least two corrugated layers with a center sheet disposed between adjacent said corrugated layers.