Patents by Inventor Masao Ohnuma

Masao Ohnuma 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).

  • Sliding nozzle plate-metal frame fixing structure
    Patent number: 5470048
    Abstract: A sliding nozzle plate-metal frame fixing structure which allows the sliding nozzle plate to be mounted to and removed from the metal frame with ease. The sliding nozzle plate which is used with a sliding nozzle device attached to a molten metal vessel has a sliding surface, and is surrounded by a metal case with the exception of the sliding surface. The metal case has a projection or a plurality of projections of a particular shape on the surface of the plate opposite the sliding surface, and a metal frame in which the metal-cased plate to be mounted has a plurality of concave portions corresponding to the projection or projections of the metal case, so that the metal-cased plate can be mounted to and removed from the metal frame simply and accurately through engagement and disengagement of each of the metal case projection or projections with each of the metal frame concave portions.
    Type: Grant
    Filed: August 29, 1994
    Date of Patent: November 28, 1995
    Assignee: Krosaki Corporation
    Inventors: Toshimitsu Taira, Masao Ohnuma, Hisao Hanada, Teruo Aoki, Tetsuro Kuhara
  • Apparatus for compressively holding casting nozzles
    Patent number: 4693401
    Abstract: An apparatus for changing casting nozzles such as immersion nozzles easily, quickly, and reliably.
    Type: Grant
    Filed: July 26, 1985
    Date of Patent: September 15, 1987
    Assignee: Kurosaki Refractories Co., Ltd.
    Inventors: Takahiro Nishimura, Masao Ohnuma