Wrist Pronation/Supination Device

PCT No. PCT/FR93/01311 Sec. 371 Date Aug. 22, 1995 Sec. 102(e) Date Aug. 22, 1995 PCT Filed Dec. 28, 1993 PCT Pub. No. WO94/15130 PCT Pub. Date Jul. 7, 1994A multilayer pipe is comprised of an internal tubular ply made from a synthetic material, a strengthening reinforcement member also made from a synthetic material and an external ply made from a synthetic material. At least one of the plies is bonded, by melting, to the reinforcement member. The strengthening reinforcement member has, over the whole or part of its length, a reticulate lacunary structure, of which only internal and external faces thereof are bonded to corresponding adjacent plies. Spaces of the lacunary structure are blocked off by, but not filled by, these plies.