Patents by Inventor Toshinari Kato

Toshinari Kato 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).

  • KEY HOLE INSERTION FOR MANHOLE AND MANHOLE COVER LOCKING APPARATUS EQUIPPED WITH THE KEY HOLE INSERTION AND MANHOLE COVER LOCKING SYSTEM AND UNLOCKING METHOD AND MANHOLE COVER OPENING AND CLOSING CONTROL SYSTEM
    Patent number: 6435763
    Abstract: The present invention is provided with a key hole insertion fitted to a manhole cover, a manhole cover locking apparatus equipped with the key hole insertion, a manhole cover locking system, a method for unlocking the manhole cover, and a control system for opening and a closing manhole cover, which is designed to prevent an external access to the key hole of the manhole cover, thus attaining a sound and severe locking management. The electrical locking assembly can be added to conventional manhole covers in a simple way. The structure of the invention is characterized in a key hole insertion A inserted in a key hole 3b of the inner manhole cover 3 or the key hole 5b of the manhole cover 5 enough to engage pins 11b with engaging openings 12b of the cap holding member 12 secured to the key hole 3b or the key hole 5b. This allows the key hole insertion A to be locked to the key hole 3b or the key hole 5b.
    Type: Grant
    Filed: March 29, 2000
    Date of Patent: August 20, 2002
    Assignee: Haneda Humepipe Co., Ltd.
    Inventors: Tetsushi Sakane, Nakamaro Hyodo, Takashi Fujii, Hironori Namioka, Toshinari Kato