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. 14, 1999
Filed:
May. 19, 1998
Applicant:
Inventors:
Brian D Hoefler, Rockford, IL (US);
Sumanth Kumar, Rockford, IL (US);
Assignee:
Ingersoll Cutting Tool Company, Rockford, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23B / ;
U.S. Cl.
CPC ...
408230 ; 408229 ;
Abstract
A generally cylindrical drill, particularly an insert drill having multiple cutting inserts, helical chip grooves to clear the chips from the hole, and a gripping shank opposite the cutting end of the drill, wherein the drill experiences an unbalanced resultant transverse force upon the cutting tip of the drill, and that resultant is oriented perpendicularly to an axial plane containing the neutral axis of the maximum resistive moment at the grooved section of maximum bending stress adjacent to its juncture with the gripping shank.