Patents by Inventor Kazumi Sunakawa

Kazumi Sunakawa 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).

  • Electrically-operated, curtain drawing/undrawing mechanism
    Patent number: 4775039
    Abstract: An electrically-operated curtain drawing/undrawing mechanism comprises a reduction gear connected on the output shaft side of a motor and a driving pulley connected to the reduction gear through an electromagnetic clutch, and further includes an operating switch for sending an operating signal to an electromagnetic clutch circuit in which the electromagnetic clutch is incorporated, and a control logic circuit for sending an operating signal for the motor to the electromagnetic clutch circuit, the electromagnetic clutch circuit being provided for sending the operating signal for sending the operating signal for the electromagnetic clutch to the control logic circuit. Ball bearings are incorporated in the respective bearing portions of a driven pulley and leading curtain runner's wheels.
    Type: Grant
    Filed: January 28, 1987
    Date of Patent: October 4, 1988
    Assignee: Yokota Co., Ltd.
    Inventor: Kazumi Sunakawa