Patent ID: 6976821
Filing Date: 2005-12-20
Classification: B23Q,B25J,Y10T

Abstract:
1. In a device for the translatory positioning of a platform with articulated rods of invariable length having first and second ends, whose first ends are hinged to the platform, and whose second ends are coupled with respectively independent rail-mounted slide blocks, wherein the coupling points on the platform and coupling points on the sliding blocks, respectively, do not lie on a straight line, and the articulated rods do not extend parallel to either each other or a shared plane, the improvement wherein, only three independent sliding blocks and accompanying initial articulated rods are present, and at least one of the coupling points on the sliding blocks is offset relative to a rail axis, and all sliding blocks are arranged on a same rail defining said rail axis, wherein movement of the platform is limited by three restrictive guides, each guide secured between at least one of (1) a sliding block and the platform and (2) at the ends of one of the articulated rods connecting the rod to its respective sliding block and the platform, and wherein each guide permits one rotation of the platform relative to the sliding block only about two rotational axes while preventing rotation about a third rotational axis, and wherein the respective third rotational axis of each sliding block does not extend parallel to the third rotational axes of the other sliding blocks, and does not lie in a shared plane.