Activated earth drill
OwnerUlrich W. Bechem, Klaus Bechem +1inventors
InventorsUlrich W. Bechem, Klaus Bechem, Philip C. Bechem
Life of this patent
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Abstract
The invention relates to a drill bit which includes a drive arrangement having two opposed drive shafts which are transverse to the drill rod axis, mechanism for driving the shafts and a rock comminuting cutter which is eccentrically mounted on each of the shafts.
Claims10
An activated earth drill assembly comprising, an elongated drill rod having an upper portion and a lower portion and defining a longitudinal axis, a drill bit attached to the lower portion of the drill rod, the drill bit including a drive arrangement having two opposed drive shafts which extend outwardly away from the drill rod, each shaft defining an axis of rotation, means for rotationally driving the drive shafts, about its axis of rotation and a rock comminuting cutter eccentrically mounted on each drive shaft for rotation therewith, the eccentric mounting providing for both rotational movement of each cutter about the respective axis of rotation and movement of the cutter upwardly and downwardly in a direction generally perpendicular to the axis of rotation as each cutter is rotated by the respective drive shaft.
Dependencies are inferred from the claim text.