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:
Dec. 24, 1991
Filed:
Apr. 24, 1990
Applicant:
Inventors:
Assignee:
Sandvik AB, , SE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21C / ; B32B / ;
U.S. Cl.
CPC ...
299 79 ; 51309 ; 175409 ; 428698 ;
Abstract
The present invention relates to a tool for cutting solid material, the tool including a tool body having a supporting surface, and a cutting insert having a generally conical tip portion and a shoulder portion that is intended to rest against a supporting surface, the cutting insert being secured to the tool body, e.g., by brazing. The invention also relates to the cutting insert per se. The cutting insert has a concave portion between its tip and bottom which concave portion extends circumferentially around the cutting insert. In addition, a special type of cemented carbide is used for the cutting insert.