Patent ID: 7357458
Filing Date: 2008-04-15
Classification: E21C

Abstract:
1. Boring rig for underground boring for excavation purposes and including a substructure, propulsion means for rig travel along a drift, stabilizing means, and a boring unit having a cutter head and a rotation and forcing means, wherein the rig has a first direction of general travel and two sideways directions, and wherein the boring unit is pivotally attached to the substructure for pivotal movement of the boring unit into an operating direction, wherein the stabilizing means include horizontal and vertical stabilizing means that are directly attached to the substructure in order, in active positions, to be pressed against an adjacent rock face so as to transmit forces from the boring unit, that are occurring during boring, to said rock face; said boring unit being pivotal over pivot means comprising rotation joints attached to the substructure at separate locations along the first direction; said horizontal stabilizing means comprising sideways directed horizontal jacks positioned on each side of said substructure; and force transmitting means provided between each said rotation joint and a holder for one of said horizontal jacks.