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:
Nov. 07, 1978
Filed:
Apr. 21, 1977
Applicant:
Inventor:
David Alan Hopkins, Detroit, MI (US);
Assignee:
The Valeron Corporation, Oak Park, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23B / ;
U.S. Cl.
CPC ...
408223 ; 408199 ; 408705 ; 408713 ;
Abstract
An indexable insert drill employing a pair of radially opposed inserts having either positive or negative axial lead cutting edges extending in the same cone of revolution. One of the inserts has a radially inner arcuate corner intersecting and extending across the axial center line. The other insert is located relatively overlapping but outward radially with an outermost corner adapted to finish cut the side wall diameter of the hole. Insert cutting edges provide for chip interruption and breakage.