Patents by Inventor Masami Sugahara

Masami Sugahara 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).

  • Spindle for machine tools
    Patent number: 6174115
    Abstract: A machine tool spindle (1) having a through hole capable of housing a collect (30) which grips a tool holder (31) and a draw bar (27) to which the collect (30) is attached, and a tapered inner surface which holds the tool holder; the spindle being made of ceramic as a single cylindrical body. The single cylindrical body has a pair of enlongated holes (2) through which a pin (24) which moves the draw bar (27) in the axial direction of the spindle (1) penetrates. The spindle (91) is preferably made of silicon nitride ceramic, and has a thickness greater than about 0.1 times its outer diameter and greater than about 0.02 times its length.
    Type: Grant
    Filed: October 4, 1999
    Date of Patent: January 16, 2001
    Assignee: Sodick Co., Ltd.
    Inventors: Akitake Hashidate, Masami Sugahara, Keita Misawa