A universally articulable supporting sheath comprises an interconnected series of links, each having a convex spherical surface at one end, and a concave spherical surface at its opposite end. The concave and convex surfaces mate with one another to form the sheath. Special links having branch openings...http://www.google.com/patents/US5069486?utm_source=gb-gplus-sharePatent US5069486 - Flexible supporting sheath for cables and the like
