Patents by Inventor Tohru Nakaso

Tohru Nakaso 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).

  • Machine tool with an automatic tool exchanger
    Patent number: 4185377
    Abstract: A machine tool is provided with an exchange arm for automatically exchanging tools between a tool spindle and a tool magazine. A drive key and a detent pin protrude respectively from the tool spindle and each of the tool storage portions of the magazine and are engageable, with a predetermined play, with a key-way of each tool. A fine indexing device has a rotatable cam drum on which a first cam segment is formed for indexing the tool spindle to a predetermined angular position following a coarse indexing operation by a coarse indexing device. A second cam segment is further formed on the cam drum to rotate the tool spindle more than the play from said predetermined angular position after a fresh tool is inserted into the spindle, so that a positive engagement between the drive key and the key-way of the tool can be achieved.
    Type: Grant
    Filed: April 19, 1978
    Date of Patent: January 29, 1980
    Assignee: Toyoda Machine Works, Ltd.
    Inventors: Tohru Nakaso, Manabu Hosokawa, Kenzi Nomura, Tatsuya Hikosaka
  • Machine tool with an automatic tool exchanger
    Patent number: 4091526
    Abstract: A machine tool is provided with an exchange arm for automatically exchanging tools between a tool spindle and a tool magazine. A drive key and a detent pin protrude respectively from the tool spindle and each of the tool storage portions of the magazine and are engageable, with a predetermined play, with a key-way of each tool. A fine indexing device has a rotatable cam drum on which a first cam segment is formed for indexing the tool spindle to a predetermined angular position following a coarse indexing operation by a coarse indexing device. A second cam segment is further formed on the cam drum to rotate the tool spindle more than the play from said predetermined angular position after a fresh tool is inserted into the spindle, so that a positive engagement between the drive key and the key-way of the tool can be achieved.
    Type: Grant
    Filed: December 29, 1976
    Date of Patent: May 30, 1978
    Assignee: Toyoda Machine Works, Ltd.
    Inventors: Tohru Nakaso, Manabu Hosokawa, Kenzi Nomura, Tatsuya Hikosaka