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:
Aug. 02, 2016
Filed:
Jan. 27, 2011
Juergen Schwaegerl, Vohenstrauss, DE;
Peter Sollfrank, Waldthurn, DE;
Juergen Schwaegerl, Vohenstrauss, DE;
Peter Sollfrank, Waldthurn, DE;
KENNAMETAL INC., Latrobe, PA (US);
Abstract
A method for manufacturing a drill bit (), wherein in a first step the chip flutes () are ground into a round rod, in a second step the round rod is ground down to its outer diameter () with simultaneous grinding of the drill-bit back (), and wherein in a third step the drill-bit front () is ground, and a drill bit () having at least one chip flute () and one secondary cutting edge and one drill-bit back () adjoining the secondary cutting edge, the drill-bit back () sloping downwards as the distance from the secondary cutting edge increases, in order to create a clearance that becomes continuously larger as the distance from the point of intersection () of the secondary cutting edge with the drill-bit back () increases.