Drill and method of manufacturing drill

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 9827617
APP PUB NO 20150336182A1
SERIAL NO

14713432

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Abstract

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According to one implementation, a drill has at least one cutting edge. A projected shape of a passing area of a ridgeline of the at least one cutting edge when the at least one cutting edge is rotated around a tool axis becomes a line-symmetric and discontinuous line along a parabola, two parabolas, an ellipse or two ellipses. The projected shape is drawn on a projection plane parallel to the tool axis.

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Patent Owner(s)

Patent OwnerAddress
SUBARU CORPORATIONTOKYO 150-8554

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Nakahata, Tatsuo Tokyo, JP 43 165
Nishino, Toshio Tokyo, JP 26 339
Saito, Manabu Tokyo, JP 49 995
Takahashi, Hideharu Tokyo, JP 26 397
Watanabe, Masao Tokyo, JP 188 1627

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