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:
Sep. 22, 1987
Filed:
Jun. 02, 1986
Applicant:
Inventor:
Cornelius Phaal, Craighall Park, Johannesburg, Transvaal, ZA;
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23P / ;
U.S. Cl.
CPC ...
7610 / ;
Abstract
A plurality of blanks for drill bits are produced from a disc-shaped composite abrasive compact by first producing a plurality of sticks of polygonal shape end-on and thereafter longitudinally rounding each stick. The rounded drill blank is then fluted to produce a small diameter twist drill bit.