Patent ID: 6039516
Filing Date: 2000-03-21
Classification: B23Q,Y10T

Abstract:
Extending system with at least four extending elements (10, 20, 30, 40, 50) which are disposed behind one another and can be moved relative to one another in a direction of extension (B) as well as a direction of insertion (A) opposed thereto between an inserted position and an extended position, wherein a group of three extending elements (10, 20, 30) disposed immediately behind one another are connected to one another by way of a coupling arrangement (12, 28, 31) which, upon relative movement between two extending elements (20, 30) of the group, brings about a forced relative movement between these two extending elements (20, 30) and the third extending element (10) of the group, characterized in that the coupling arrangement has a coupling element (28) which runs round a return spindle (24, 26), the said return spindle being fixed relative to the middle extending element (20) of the group and extending perpendicular to the direction of extension, and the said coupling element (28) is movable along a path which is fixed relative to the return spindle (24, 26) and runs round the latter, the coupling arrangement also having two entraining elements (12, 31) which are coupled to corresponding coupling regions (28a, 28b) on the coupling element (28) and are connected to one of the outer extending elements (10, 30) of the group, wherein the coupling element (28) runs at least partially around the return spindle (24, 26) between the coupling regions (28a, 28b).