A longitudinal cutting tool is formed with at least one groove and a stop collar is received on the cutting tool. The stop collar has a stop surface, and yieldably resilient means in the form of a threaded screw passing through a slot in the collar, and rubberized buttons inserted into the collar are...http://www.google.fr/patents/US4039266?utm_source=gb-gplus-shareBrevet US4039266 - Combination stop collar and cutting tool
