For a truck, a new screen wiper mechanism is sought, which carries the wiper blade in parallel. These already has a transmission (see figure below) showing that implements the necessary coupling curve. The wiper blade is to be connected with the plane F rigid. With the aid of the set of Roberts now wants a 6-membered gear be constructed which performs the wiper blade in parallel. For space reasons, the resulting two-stroke to B 0 can be grown.