Patents by Inventor Tokuji Machida

Tokuji Machida 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).

  • Electric furnace waste heat recovery method and apparatus
    Patent number: 4099019
    Abstract: Useful heat is recovered from electric furnaces using two heat recovery systems. Primary heat recovery is effected using liquid water or other cooling liquid and is performed in such a manner that the temperature of the liquid does not exceed its boiling point at atmospheric pressure. Secondary heat recovery is effected by indirect heat exchange between the exhaust gas of the furnace and a gaseous cooling medium and is performed in such a manner that the gaseous medium is heated to a temperature above the boiling point of the cooling liquid. A part or the entirety of the cooling liquid is then heated by the gaseous medium.
    Type: Grant
    Filed: March 16, 1977
    Date of Patent: July 4, 1978
    Assignee: Joetsu Denro Kogyo Co., Ltd.
    Inventors: Koichi Horibe, Minoru Watanabe, Tokuji Machida