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. 25, 2022
Filed:
Apr. 09, 2020
Applicant:
Kennametal Inc., Latrobe, PA (US);
Inventors:
Herbert Rudolf Kauper, Erlangen, DE;
Jürgen Schwägerl, Vohenstrauss, DE;
Assignee:
KENNAMETAL INC., Latrobe, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23B 51/00 (2006.01);
U.S. Cl.
CPC ...
B23B 51/009 (2013.01); B23B 2251/408 (2013.01); B23B 2251/48 (2013.01); Y10T 408/906 (2015.01);
Abstract
The invention relates to a step drill having a shaft section extending along a longitudinal axis of the step drill and a cutting section with a cutting tip, and having a chip-breaking geometry which comprises a concavely curved surface and is configured such that ribbon chips are broken on the concavely curved surface during rotation of the step drill, whereby the chip-breaking geometry is disposed on a reaming step of the step drill.