Patent ID: 8413539
Filing Date: 2013-04-09
Classification: B25J,Y10T

Abstract:
1. A parallel-type displacement device, comprising: at least three arms each pivoting about a pivot axis, the pivot axes defining a polygon as seen from a point above said device, wherein each of the arms is actuated by an actuator and each said arm is further connected to a head defining a small base through a pair of linking members respectively articulated on the head and on the arms, each said arm and its respective head connection forming a hinge having two degrees of freedom such that the head always maintains a same orientation and inclination, wherein in a neutral position, each arm is arranged so that working planes of said head are parallel with respect to each other and are non-concentric with respect to the pivot axis of any one of the arms, wherein each said pair of linking members is connected to said head via a transversal part, wherein a first end of said transversal part is attached to an end of one of said pair of linking members and a second end of said transversal part is attached to an end of the other of said pair of linking members, and wherein points of attachment of said first ends of said transversal parts to respective ones of said pair of linking members form a first plane parallel to said working planes of said head, and points of attachments of said second ends of said transversal parts to respective ends of the other of said pair of linking members form a second plane parallel to said working planes of said head, said first and second planes being disposed at opposite sides of said working planes of said head.