Patents by Inventor Sukio Yonekura

Sukio Yonekura 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).

  • Lifting apparatus
    Patent number: 4022429
    Abstract: A lifting apparatus wherein a cone rack mechanism having cone pieces interlocked to driving gears is driven by such driving gears, which are connected and controlled by a special friction clutch mechanism, a latch mechanism, and a centrifugal brake, for continuing the lifting and lowering of a body, such as a water gate.
    Type: Grant
    Filed: December 19, 1975
    Date of Patent: May 10, 1977
    Assignee: Daido Kiko Co., Ltd.
    Inventor: Sukio Yonekura