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Hosoi; Toshiaki
Hirano-ku, Osaka, JP
No. of patents:

Patent Number Title Of Patent Date Issued
4703588 Drill cutting edge grinder November 3, 1987
A cutting edge grinder for grinding the cutting edges of drills includes a center shaft coaxial with a chuck to hold a drill to be ground, a cam attached to the center shaft, a movable frame to hold the center shaft so as to turn freely, a guide member to guide the movable frame in an
4565473 Drill January 21, 1986
A drill formed with chip discharging flutes in its shank and having a flute width ratio of 0.5 to 0.02 to give increased torsional rigidity to the drill shank, the drill being adapted to form holes, especially deep holes, with an improved cutting efficiency.

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