Patent ID: 8727450

Claim:
A mining machine for engaging a mine wall, the mining machine comprising: a frame; an arm including a first end and a second end, the first end pivotally coupled to the frame such that the arm pivots in a first direction about a pivot pin; an actuator including a first end coupled to the arm, the actuator pivoting the arm in the first direction; a first disc cutter coupled to the second end of the arm and rotatable about a first axis, the first disc cutter configured to engage the mine wall at a first angle of attack when the arm is pivoted in the first direction; and a second disc cutter coupled to the second end of the arm and rotatable about a second axis positioned at an angle with respect to the first axis, the second disc cutter spaced apart from the first disc cutter such that the second disc cutter trails the first disc cutter when the arm is pivoted in the first direction, the second disc cutter configured to engage the mine wall at a second angle of attack when the arm is pivoted in the first direction, the second angle of attack being equal to the first angle of attack.