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:
Jul. 09, 2013
Filed:
Jun. 14, 2007
Byung Gyun Bae, Daegu, KR;
Byung Gyun Bae, Daegu, KR;
TaeguTec, Ltd., Dalseong-gun, Daegu, KR;
Abstract
A drill has inner and outer inserts. The drill includes a drill body having a rotational axis; an inner insert mounted adjacent to the axis at a proximal end of the drill body having an axis-symmetrical contour having four cutting edges and four rounded corners; and an outer insert identical to the inner insert being mounted farther away from the axis than the inner insert. Loci of the inner and the outer insert partially overlap. At the overlapping region, the cutting edge of the inner insert and the cutting edge of the outer insert extend toward the axis in a direction to a workpiece and the locus of the cutting edge of the inner insert protrudes in a direction to the workpiece along the axis of the drill body compared to the locus of the cutting edge of the outer insert.