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:
Jun. 15, 1993
Filed:
Jun. 11, 1992
Applicant:
Inventors:
John J Prizzi, Greensburg, PA (US);
Stephen P Stiffler, New Enterprise, PA (US);
Assignee:
Kennametal Inc., Latrobe, PA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
E21C / ;
U.S. Cl.
CPC ...
299 86 ; 175427 ;
Abstract
A multi-portion carbide cutting insert which affixes to the forward end of a rotatable cutting bit. The cutting insert has an axially forward tip portion and a flange portion with at least four mediate portions between the tip portion and the flange portion. The first mediate portion has an included angle less than that of the second mediate portion. The second mediate portion has an included angle greater than that of the third mediate portion. The fourth mediate portion has the largest included angle.