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:
Jul. 23, 1996
Filed:
Apr. 01, 1994
David R Glenn, Rancho Palos Verdes, CA (US);
Other;
Abstract
A tool is disclosed herein for drilling a square hole in a workpiece adapted to be mounted in the chuck jaws of a drill press. The tool includes a drive shaft having an enlarged spindle provided midway between its opposite ends. One shaft end releasably engages with the chuck jaws while the opposite end includes a threaded bore. A stationary body rotatably receives the shaft and spindle via a pair of spaced roller thrust bearings and a sleeve bushing. A flat drill downwardly depends from the drive shaft threaded bore and terminates in a spade cutting edge. A hollow square chisel is secured to the body and encloses the flat drill. The flat drill bores a circular or round hole in the workpiece while the square chisel forms the corners of a square hole.