Patents by Inventor Naobumi Sekiya

Naobumi 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 system utilizing linear motor
    Patent number: 4922830
    Abstract: A conveyor system comprising a conveyor vehicle, a guide rail for supporting the conveyor vehicle to be freely movable relative thereto, and a linear motor including a primary coil and a secondary conductor for driving the conveyor vehicle. The primary coil is mounted on the conveyor vehicle and the secondary conductor is mounted on the guide rail. The guide rail defines a secondary conductor support portion for limiting downward and transverse movements of the secondary conductor.
    Type: Grant
    Filed: December 16, 1988
    Date of Patent: May 8, 1990
    Assignee: Daifuku Co., Ltd.
    Inventors: Shigeyoshi Fujita, Naobumi Sekiya, Takashi Okamura, Yoshitaka Watanabe