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. 05, 2022
Filed:
Apr. 13, 2020
Korloy Inc., Seoul, KR;
Seung-Su Ahn, Cheongju-si, KR;
Je-Hun Park, Cheongju-si, KR;
Kyung-il Kim, Cheongju-si, KR;
Sung-Hyun Kim, Cheongju-si, KR;
Sung-Gu Lee, Cheongju-si, KR;
Sun-Yong Ahn, Cheongju-si, KR;
KORLOY INC., Seoul, KR;
Abstract
The present invention relates to a cutting tool, which performs, like a drill or a ball end mill, cutting while rotating in a state in which the center of the tip end is in contact with a work material, and includes a wear-resistant layer formed at the tip end thereof, wherein a portion of the wear-resistant layer is selectively removed through tip end polishing from the center of the tip end of the drill or the ball end mill to a predetermined area, so as to restrain micro-brittle wear generated in an ultra-low speed region, and thus remarkably improving the cutting lifespan of the cutting tool such as the drill or the ball end mill.