Patents Assigned to Ryoka Techono Engineering & Construction Co.
  • Rotating-drum heat treatment apparatus
    Patent number: 4934928
    Abstract: A rotating-drum heat treatment apparatus for carrying out cooling or heating of a material to a desired temperature. The apparatus includes two drums arranged in a casing adjacent to each other for continuously cooling or heating the material to be heat-treated, to thereby increase a time required for the heat treatment of the material.
    Type: Grant
    Filed: May 31, 1989
    Date of Patent: June 19, 1990
    Assignee: Ryoka Techono Engineering & Construction Co.
    Inventor: Hirokazu Akamatsu