Patents by Inventor Kazuaki Tone

Kazuaki Tone has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Twist drill
    Patent number: 5350261
    Abstract: A twist drill is disclosed. The twist drill comprises a substantially cylindrical tool body having a rotational axis therethrough, a front portion, a rear portion, a plurality of web thickness, a front flank face, a plurality of flutes formed on an outer peripheral surface thereof and extending to the front flank face, and a land disposed between a pair of the flutes. The flute has a wall portion facing toward the rotational direction of the tool body. A cutting edge is formed at an intersection between the wall portion of the flute and the front flank face. The web thickness at the rear portion of the tool body is smaller than the web thickness at the front portion of the tool body.
    Type: Grant
    Filed: February 26, 1993
    Date of Patent: September 27, 1994
    Assignee: Mitsubishi Materials Corporation
    Inventors: Sueji Takaya, Kazuo Takasaki, Kazuaki Tone