Drill bit for drilling having at least two cutting edges, each with two cutting portions and a non-cutting portion between the two cutting portions

US8550756B2 · kind B2 · utility

Assignee

• KENNAMETAL INC. · US

Inventors

• Bernhard Borschert · Bamberg, DE
• Ullrich Krenzer · Zirndorf, DE
• Herbert Rudolf Kauper · Erlangen, DE
• Juergen Schwaegerl · Vohenstrauß, DE

Key dates

• Filing date: Apr 10, 2009
• Grant date: Oct 8, 2013
• Expiry date: May 25, 2032

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T408/9097
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

A drill bit for drilling having at least two cutting edges, each with two cutting portions and a non-cutting portion between the two cutting portions. The abstract of the disclosure is submitted herewith as required by 37 C.F.R. §1.72(b). As stated in 37 C.F.R. §1.72(b): A brief abstract of the technical disclosure in the specification must commence on a separate sheet, preferably following the claims, under the heading “Abstract of the Disclosure.” The purpose of the abstract is to enable the Patent and Trademark Office and the public generally to determine quickly from a cursory inspection the nature and gist of the technical disclosure. The abstract shall not be used for interpreting the scope of the claims. Therefore, any statements made relating to the abstract are not intended to limit the claims in any manner and should not be interpreted as limiting the claims in any manner.