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. 13, 2009
Filed:
Jan. 20, 2006
Applicants:
Bernhard Borschert, Bamberg, DE;
Ulrich Krenzer, Zirndorf, DE;
Rainer Büttner, Wilhermsdorf, DE;
Inventors:
Assignee:
Kennametal Inc., Latrobe, PA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B23B 51/06 (2006.01);
U.S. Cl.
CPC ...
Abstract
A drill bit having a shank portion and a cutting portion, which cutting portion generally has at least one cutting edge and a chip flute that has a helical portion. The drill bit has at least one straight coolant channel that has a coolant exit orifice disposed at least partially in the flute and oriented toward the cutting edges to supply coolant thereto to cool the cutting edges and chips produced during a cutting operation.