Patents by Inventor Hideyoshi Yoshizawa

Hideyoshi Yoshizawa 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).

  • Method for controlling withdrawal of electrode in electric-discharge machine
    Patent number: 5064985
    Abstract: The method for controlling the withdrawal of the electrode in an NC electric-discharge machine permits a linear withdrawal of the electrode to a forward position at least two blocks preceding the present forward position from the workpiece according to a withdrawal command received by the NC unit and with a high efficiency while a workpiece is being machined with electric discharges made between the electrode and the workpiece with the former being forwarded in relation to the latter according to a control information including positioning commands given to the NC unit for each block.
    Type: Grant
    Filed: December 29, 1989
    Date of Patent: November 12, 1991
    Assignee: Hitachi Seiko, Ltd.
    Inventors: Hideyoshi Yoshizawa, Takashi Ishii, Toshiyuki Makino, Hidekatsu Ozawa, Yasuyuki Shimizu