Patent ID: 8029523

Claim:
A bone cutter device, the device comprising: a) a tubular element including a distal tap having a threaded exterior surface configured to be advanced into a hole in bone, said tubular element including a proximal end, a distal end, and an axial bore; b) a piston longitudinally displaceable within said axial bore and having a distal end; c) a cutting element mounted on said distal end of said piston adjacent said distal end of said tap, said cutting element forced away from said distal end of said tubular element by a spring force of a spring and displaceable against said spring force when under load to be located in contact with said distal end of said tap; d) a first drive means rotationally fixed at a proximal end of said tubular element for rotationally advancing said tap; and e) a second drive means for rotating said cutting element when said cutting element is under load.