The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 27, 2004
Filed:
Apr. 19, 2002
Arthur E. Drumm, Marysville, OH (US);
Thomas B. Mash, Knoxville, TN (US);
Other;
Abstract
A tool for boring has a first shaft for drivingly linking at a first end to a portable rotatable machine. At a second end, the tool has a fastener to which a modular auger section can be drivingly linked. A second shaft of the tool has an outer surface to which a radially inwardly extending edge of a helical flight is attached. A cylindrical collar is attached to a radially outwardly extending peripheral edge of the flight and is mounted radially outwardly of the second shaft. An insulator interposed between the shafts electrically insulates the shafts from each other. The shafts can be unlinked through a shear pin breaking in response to a predetermined amount of relative torque to the shafts.