Patent ID: 6149227
Filing Date: 2000-11-21
Classification: B29C,B62D,Y10T

Abstract:
A stiffener for reinforcing a hollow structure having a pair of spaced walls, said stiffener comprising a first carrier member, a first layer of expandable polymer on said first carrier member for creating a structural reinforcement member when said polymer is expanded, said first carrier foam and said first layer comprising a first laminate, a second carrier member, a second layer of said polymer on said second carrier member, said second carrier member and second layer comprising a second laminate, said first laminate having a connecting portion, a notch in said connecting portion of said first laminate, said second laminate having a connecting portion, a notch in said connecting portion of said second laminate, said first laminate and said second laminate being interconnected by said connecting portions being interlocked at said notches, and said connected laminates creating a corrugated frame which may be inserted into the hollow structure between the spaced walls.