A passive body-motion generating device particularly adapted for moving a leg through natural or representative hip joint articulation, the device having body support structure, at least one leg support member having a proximal end, a distal end and a longitudinal rest axis, a hinge mechanism connecting...http://www.google.com/patents/US5643180?utm_source=gb-gplus-sharePatent US5643180 - Passive body-motion generating, apparatus and procedure
