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:
Oct. 13, 2015
Filed:
Jan. 18, 2013
Applicants:
Laverne R. Durfee, Harmony, NC (US);
Ryan F. Hall, Charlotte, NC (US);
Inventors:
LaVerne R. Durfee, Harmony, NC (US);
Ryan F. Hall, Charlotte, NC (US);
Assignee:
Irwin Industrial Tool Company, Huntersville, NC (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B27G 15/00 (2006.01); B23B 51/00 (2006.01); B23B 51/02 (2006.01);
U.S. Cl.
CPC ...
B23B 51/009 (2013.01); B23B 51/0054 (2013.01); B23B 51/02 (2013.01); B27G 15/00 (2013.01); B23B 2251/242 (2013.01); Y10T 408/902 (2015.01); Y10T 408/906 (2015.01); Y10T 408/9065 (2015.01);
Abstract
A wood drill bit has a plurality of step sections where each step section has at least one flute that terminates in a cutting edge. The effective diameter of each of the plurality of step sections is different than the diameter of the other of the plurality of step sections such that a single bit may be used to bore holes in wood of different diameters.