Patents by Inventor Akio Hidaka

Akio Hidaka 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).

  • Method and apparatus for the continuous furnace brazing and gas soft-nitriding treatments of iron articles
    Patent number: 4395025
    Abstract: A method for continuously treating an iron member wherein the iron member is first subjected to furnace-brazing in a controlled gas environment and subsequently to a soft-nitriding treatment by addition of ammonia gas (NH.sub.3) to the controlled gas for the brazing. An apparatus for carrying out the method is also provided, and includes three partitioned chambers for brazing, annealing and soft-nitriding the iron member, each chamber being partitioned by a member such as a stainless steel film curtain at opposite sides thereof. A controlled gas feed system communicates with each of the chambers, and an ammonia gas feed system is connected to the soft-nitriding chamber.
    Type: Grant
    Filed: September 24, 1981
    Date of Patent: July 26, 1983
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Teruoki Watanabe, Tadao Kanno, Akio Hidaka, Shunji Kobayashi
  • Method and apparatus for the continuous furnace brazing and soft-nitriding treatments of iron articles
    Patent number: 4294630
    Abstract: A method for continuously treating an iron member wherein the iron member is first subjected to furnace-brazing in a controlled gas environment and subsequently to a soft-nitriding treatment by addition of ammonia gas (NH.sub.3) to the controlled gas for the brazing. An apparatus for carrying out the method is also provided, and includes three partitioned chambers for brazing, annealing and soft-nitriding the iron member, each chamber being partitioned by a member such as a stainless steel film curtain at opposite sides thereof. A controlled gas feed system communicates with each of the chambers, and an ammonia gas feed system is connected to the soft-nitriding chamber.
    Type: Grant
    Filed: July 12, 1979
    Date of Patent: October 13, 1981
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Teruoki Watanabe, Tadao Kanno, Akio Hidaka, Shunji Kobayashi