System for marking the relative position of a mobile element with respect to a fixed element

Claim 1

In a system for marking the relative position of a mobile element with respect to a fixed element, said mobile element being able to occupy two extreme positions, close or remote, of the type comprising a lever articulated by one of its ends on said fixed element and guiding means disposed on said mobile element and cooperating with said lever, said guiding means being in the vicinity of the articulation of said lever in the close extreme position and being in abutment against the other end of said lever in the remote extreme position, said guiding means comprising rollers mounted for rotation on said mobile element and disposed on either side of said lever pressing it therebetween, said lever having at least one undulatory profile defining a plurality of troughs capable of cooperating with one of said rollers, so as to immobilize said mobile element in a desired relative position when said roller is located in one of the trough of said profile, the improvement comprising: a housing mounted on said mobile element, a pair of spaced generally parallel flexible bars on each of which is mounted for rotation one of said rollers, and a resilient elastomeric support surrounding each end of said bars and operatively connecting said bars to said housing, whereby said bars flex to provide functional clearance between said rollers for the undulatory profile of said lever as said mobile element moves between its extreme positions.