Abstract: A drill head borer is configured to be attached to a rotary auger including a helical blade. The borer includes at least one wing extending radially away from a body centered about a longitudinal axis. An aligning ledge is formed in the drill head borer configured to self-align the drill head borer with the helical blade without the need for substantial measurement by a user. The borer further includes a plurality of teeth arranged in a convex configuration, along the wing when viewed from above. When viewed from the side, the teeth are angled at a lifting pitch angle.
Type:
Grant
Filed:
December 16, 2015
Date of Patent:
September 18, 2018
Assignee:
Belltec Industries, Inc.
Inventors:
Robert L. Frost, Louis S. Miliman, Alan L. Jones