A handling robot includes at least four bosses (20a, 20b, 20c, 20d) disposed in a transfer chamber so as to be coaxial with one another and rotatable independently of one another. The bosses are deviated (staggered) in their positions along the axis of a center of rotation. Each of the bosses is provided...http://www.google.se/patents/US6155131?utm_source=gb-gplus-sharePatent US6155131 - Handling robot
