Patents Assigned to Mitsubishi Cement Corporation
  • Safety door for rotary kiln
    Patent number: 8057225
    Abstract: A safety door for covering openings in a rotary kiln during maintenance operations on the rotary kiln. The door is affixed to the exterior surface of the rotary kiln and includes a hatch pivotally secured at one side edge thereof by a pivot rod to a frame. A plurality of tension coil springs are disposed on the pivot rod and continuously bias the hatch toward the opening with a force of approximately 400 pounds.
    Type: Grant
    Filed: October 5, 2009
    Date of Patent: November 15, 2011
    Assignee: Mitsubishi Cement Corporation
    Inventors: Derek W. Couse, Manuel Sandoval
  • Safety door for rotary kiln
    Patent number: 7621741
    Abstract: A safety door for covering openings in a rotary kiln during maintenance operations on the rotary kiln. The door is affixed to the exterior surface of the rotary kiln and includes a hatch pivotally secured at one side edge thereof by a pivot rod to a frame. A plurality of tension coil springs are disposed on the pivot rod and continuously bias the hatch toward the opening with a force of approximately 400 pounds.
    Type: Grant
    Filed: June 11, 2007
    Date of Patent: November 24, 2009
    Assignee: Mitsubishi Cement Corporation
    Inventors: Derek W. Couse, Manuel Sandoval