Patent ID: 8876360

Claim:
A method of generating two elements K 1 and K 2 that co-rotate about two parallel axes that are at a distance a from each other, the method comprising the steps of: providing a profile of element K 1 having n number of arcs; merging the arcs into each other tangentially at their starting and end points such that the arcs forming a convex profile, wherein a kink in the profile is represented by an arc i with a radius r_i=0 and an angle α_i, and wherein a size of the angle α_i is the same as that of the angle at which the tangents on the arcs on adjacent to arc i intersect each other at the centre point of arc i; and forming a profile of element K 2 from the profile of element K 1 by generating, for each arc of the profile of element K 1 , a corresponding arc of element K 2 , wherein the two elements K 1 and K 2 constantly touch each other at at least one point during the co-rotation.