Patent ID: 8132751

Claim:
An impact mill, comprising: a stationary portion; a rotor rotatably affixed to the stationary portion and extending from the stationary portion to a distal end surface perpendicular with a rotational axis of the rotor, the rotor comprising a frusto-conical portion that is coaxial with the rotational axis, wherein the distal end surface includes a plurality of impact members disposed thereon and protruding outwardly therefrom, wherein the plurality of impact members are staggered radially outwardly from the rotational axis of the rotor to a circumferential edge of the distal end surface; a mill casing encompassing the rotor, the mill casing including a conical track assembly that surrounds and is complementary to the frusto-conical portion of the rotor, wherein the conical track assembly is coaxial with the rotational axis of the rotor; and a plurality of serrated impact surfaces protruding from an inner surface of the conical track assembly.