Patent ID: 7434890
Filing Date: 2008-10-14
Classification: B25D,B28D,E21C,Y10T

Abstract:
1. A vibratory milling machine comprising: a base comprising a recess in a distal end of the base and one or more bosses positioned at a proximal end of the base, the one or more bosses being adapted to secure the base to a support arm; a housing having at least a first end and a second end, the housing being secured at the first end within the recess of the base, the housing adapted for substantially linear reciprocating movement relative to the base in a milling direction; at least two rotors mounted within the housing and adapted for rotation relative to the housing substantially about respective primary axes, each of the rotors having a asymmetrical weight distribution about its primary axis for imparting vibratory forces to the housing as the rotor rotates; a drive structure for rotationally driving the rotors; and a milling tool secured to the second end of the housing, the milling tool being adapted for reciprocating movement against a workpiece substantially in the milling direction.