Patents by Inventor Tsunenori Sugawara

Tsunenori Sugawara 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).

  • Stave cooling device having unwelded double tube
    Patent number: 4327899
    Abstract: A stave cooling device includes a double drawn steel tube cast-mounted in a castable metal main body, and the double tube includes an inner tube which serves as a passage for a coolant. The inner tube of the double tube contains 0.20 to 0.38% of equivalent carbon and an outer tube of the double tube contains 0.15 to 0.25% of equivalent carbon. The outer tube has on its outer surface an alumina coating of 0.08 to 0.25 mm thick, and the main body is formed by casting a spheroidal graphite cast iron. The double tube is cast-mounted in the main body such that the double tube and the main body are not welded together.
    Type: Grant
    Filed: April 3, 1980
    Date of Patent: May 4, 1982
    Assignee: Nippon Kokan Kabushiki Kaisha
    Inventors: Gyoichi Suzuki, Teruo Shimotsuma, Masaaki Higuchi, Tsunenori Sugawara, Takeshi Yano