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. 03, 2007
Filed:
Aug. 09, 2004
Muniswamappa Anjanappa, Columbia, MD (US);
LI Xu, Woodstock, MD (US);
Stephen R. Crosby, Broad Brook, CT (US);
Gerald Rescigno, Marriottsville, MD (US);
Russell M Timmons, Lutherville, MD (US);
Rickey J Thomas, Lineboro, MD (US);
Muniswamappa Anjanappa, Columbia, MD (US);
Li Xu, Woodstock, MD (US);
Stephen R. Crosby, Broad Brook, CT (US);
Gerald Rescigno, Marriottsville, MD (US);
Russell M Timmons, Lutherville, MD (US);
Rickey J Thomas, Lineboro, MD (US);
Black & Decker Inc., Newark, DE (US);
University of Maryland, Baltimore, MD (US);
Abstract
A metal cutting drill bit has a shank portion, a flute portion defining a helix angle and a tip. The tip has a primary cutting edge extending to an outer periphery of the drill bit. The primary cutting edge has a rake face defining a rake angle. The rake angle is different from the helix angle at the tip of the drill bit.