A robotic joint for use in toys or other robotic assemblies to provide locomotion to animated figures, sub-assemblies, and toy construction building sets. The robotic joint is particularly adaptable because one side of the joint carries the motor that is powering the joint. It also provides for four-way...http://www.google.fr/patents/US5318471?utm_source=gb-gplus-shareBrevet US5318471 - Robotic joint movement device
