Patents Assigned to Clearfield Machine Company
  • Coal burners, rotary furnaces incorporating the same and methods of operating
    Patent number: 4321034
    Abstract: A coal burner and rotary metal melting furnace incorporating the same is provided in the form of a generally cylindrical furnace rotatable about a horizontal axis and fired through one end with pulverized coal and preheated air through a burner structure which impinges the preheated air in a helical path against a conical spray of finely divided coal.
    Type: Grant
    Filed: April 3, 1980
    Date of Patent: March 23, 1982
    Assignee: Clearfield Machine Company
    Inventor: Charles C. Taccone