Patent ID: 8789619

Claim:
A tool comprising a cam track and cam follower means, wherein the cam track and cam follower means are engaged with one another, and the tool comprises at least one tool bit or head operatively connected to one of the at least one cam track and the at least one cam follower means, and at least one rotational drive means operatively connected to the other of the at least one cam track and the at least one cam follower means, and wherein a width of at least a portion of the cam track is greater than a width of the cam follower means and the width of the cam follower means is less than 90% of the width of the at least a portion of the cam track such that, in use, the cam follower means has two degrees of longitudinal motion, a first degree of motion defined by the cam track, and a second degree of motion defined by ricochet between opposing walls of the cam track wherein the first degree of motion has a frequency defined by the cam track, and the second degree of motion has a higher frequency than the frequency of the first degree of motion.