Patents by Inventor Harumi Kamegawa

Harumi Kamegawa 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).

  • Plate brick for sliding gate valve
    Patent number: 5280878
    Abstract: A plate brick for a sliding gate valve provides a mechanism for preventing cracks which may occur in the abutting portion of a brick setting metal fitting. The plate brick comprises ends having a semicircular shape and an outer periphery which is strained with an iron plate hoop. The generation of cracks is reduced by providing slits or recesses at both ends of the plate at positions corresponding to those of the brick fixing metal fittings.
    Type: Grant
    Filed: August 14, 1992
    Date of Patent: January 25, 1994
    Assignee: Shinagawa Refractories Co., Ltd.
    Inventors: Masaru Terao, Harumi Kamegawa, Hiroshi Inoue