This invention relates generally to the design and manufacture of high performance, composite, tubular structures. More specifically, the invention relates to a high performance, composite, tubular structure that utilizes an integral pattern of ribs on the internal diameter ("ID") or outer diameter ("OD")...http://www.google.fr/patents/US6820654?utm_source=gb-gplus-shareBrevet US6820654 - High performance composite tubular structures
