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:
May. 10, 2016
Filed:
Aug. 19, 2014
Applicant:
Black & Decker Inc., Newark, DE (US);
Inventors:
Aland Santamarina, Columbia, MD (US);
Glen V. Steinbrunner, Bel Air, MD (US);
David N. Johnson, Doncaster, GB;
Assignee:
BLACK & DECKER INC., New Britain, CT (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B23B 51/02 (2006.01); B23P 15/32 (2006.01);
U.S. Cl.
CPC ...
B23B 51/02 (2013.01); B23B 2240/16 (2013.01); B23B 2251/043 (2013.01); B23B 2251/18 (2013.01); B23B 2251/404 (2013.01); B23B 2251/60 (2013.01); B23P 15/32 (2013.01); Y10T 408/78 (2015.01); Y10T 408/905 (2015.01); Y10T 408/906 (2015.01); Y10T 408/909 (2015.01); Y10T 408/9065 (2015.01); Y10T 408/9093 (2015.01); Y10T 408/9097 (2015.01);
Abstract
An elongated drill bit has a shank at one end and working end at the other. A flute portion is between the working end and the shank. The flute portion is continuous with the shank and working end and is generally unitarily formed with them. The flute portion has at least one flute with a helix angle between approximately 30° and 35°. The working end has a pilot tip with a cutting portion. A tapered web is formed in the flute portion, a thickness of the web at the tip of the working end is about 9% to 15% of the nominal diameter.