(under subclass 414) Apparatus in which the cutting edge is formed to disintegrate the formation as a result of simultaneous rotary and a forceful contact or a repetitive striking action.
(1) Note. The dual function of formation disintegrating by rotary and percussive or impact action must be specifically described for classification in this subclass and not left to inference.
SEE OR SEARCH THIS CLASS, SUBCLASS:
331+, for rolling cutters which roll on the bottom of the bore and impact the formation due to the rolling motion.
