Patents by Inventor Naofumi Sekiya

Naofumi Sekiya 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).

  • Conveyor driven by linear motor with rolling surface of rail acting as secondary for the motor
    Patent number: 5123357
    Abstract: The present invention is based on the critically important feature of providing a left-right parallel arranged linear motor-based conveying system in which the upper surfaces of the guide rails do double duty as providing the rolling surfaces for the wheel pairs, and also as being secondary (reaction) conductor surfaces for the linear motors, and the linear motors are spaced closely above the upper surfaces of the guide rails by a predetermined clearance.
    Type: Grant
    Filed: June 28, 1990
    Date of Patent: June 23, 1992
    Assignee: Daifuki Co., Ltd.
    Inventors: Shigeyoshi Fujita, Naofumi Sekiya, Kazuyoshi Fukuhara, Yoshitaka Watanabe, Takashi Okamura