Patents by Inventor Takehiko Serizawa

Takehiko Serizawa 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).

  • Numerical controller for automatic axial feed
    Patent number: 6029098
    Abstract: A numerical controller controls a machine tool to achieve a tapping operation with high accuracy and satisfactory quality without being constrained by a set axial feed distance and a specified axial feed speed. An analyzing unit (4B) calculates a minimum axial feed distance (L.sub.min) necessary for securing a constant machining program set in an input unit (7). A speed pattern adjusting unit (4C) modifies the axial feed speed pattern so that the constant speed time (T) can be secured. An(??) distributing unit (4A) determines drive instructions for a synchronous tapping operation. A drive control unit (5) gives the drive instructions to servomotors included in a driving unit (3).
    Type: Grant
    Filed: July 16, 1997
    Date of Patent: February 22, 2000
    Assignee: Toshiba Kikai Kabushiki Kaisha
    Inventors: Takehiko Serizawa, Jun Fujita