A directional boring apparatus is disclosed where the apparatus is controlled through a method which includes deviating a drill head (16) from a straight path into a desired direction angled away from the straight path. The deviation is achieved by applying an axial force to the drill head (16) when a drill head cutting member (18) is positioned within an arc of rotation through which the desired direction passes. The drill head (16) is retracted when the cutting member (18) is outside of the arc of rotation.
申请公布号
CA2248024(A1)
申请公布日期
1997.09.12
申请号
CA19962248024
申请日期
1996.08.06
申请人
VERMEER MANUFACTURING COMPANY
发明人
VANHOUWELINGEN, MARK;RUNQUIST, RANDY R.;RANKIN, JAMES R.