Patent ID: 7182407
Filing Date: 2007-02-27
Classification: E21C,E21D

Abstract:
1. A rock boring device comprising: a boom having a proximal end and a distal end, the proximal end being pivotable about a first boom axis, wherein said boom is rotatable about a longitudinal axis of the boom; a disc cutter pivotably mounted to the distal end of the boom to pivot about a wrist axis and structured to engage a rock face; and an inertial reaction mass to stabilize the disc cutter; wherein said disc cutter is structured to be driven in an oscillating manner and movable in a nutating manner, the disc cutter configured to oscillate about an oscillation axis that is substantially perpendicular to the wrist axis, said disc cutter including a substantially continuous, circumferential cutting edge defining a leading tip and a trailing heel, the leading tip of the disc cutter being movable along a path that is substantially parallel to the rock face and substantially perpendicular to the oscillation axis to effect rock boring, the trailing heel of the disc cutter being spaced from said rock face during cutting.