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. 10, 2001
Filed:
Apr. 05, 1999
Markus Heinloth, Postbauer-Heng, DE;
Widia GmbH, Essen, DE;
Abstract
The invention concerns a cutting insert (,) for drilling. Said cutting insert (,) has a substantially rhomboid basic shape and its four cutting edges (,), which each form cutting corners (,), are broken, two first opposite cutting edges (,) each having cutting edge sections (,) which form an obtuse angle (&egr;,) of between 140 and <180°. The two second opposite cutting edges (,) have a constriction, such that two cutting edge sections (,) forming an angle (&egr;,) of >180° and 230° are produced. The invention further concerns a drill, wherein at least two of said cutting inserts are disposed on the front face of the shank, each disposed in a recess. The radially outer cutting insert has a concave active cutting edge and the radially inner cutting insert has a convex active cutting edge.