Drill bit for drilling and method for manufacturing same

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 10605007
APP PUB NO 20170275949A1
SERIAL NO

15521009

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Abstract

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Disclosed are a drill bit for drilling and a method for manufacturing same, in which the hardness of a body part of a shank can be selectively improved by performing rapid cooling in a forced cooling method after performing rapid heating selectively only on the body part of the shank in a high-frequency induction heating method after completing infiltration.

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Patent Owner(s)

Patent OwnerAddress
EHWA DIAMOND INDUSTRIAL CO LTDKYUNGGIDO 447804

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kim, Ki-Ho Seongnam-si, KR 97 1385
Yun, Jun-Yong Suwon-si, KR 2 3

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