Patents by Inventor Franz Schafer

Franz Schafer 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).

  • Flue housing for a coke oven
    Patent number: 4361468
    Abstract: A regulating device for the flue housing of a coke oven for alternately opening and closing channels of the flue housing including a rotatable shaft, frames mounted on the shaft, preferably, 90.degree. relative to each other, in alternating sequence along the shaft, peripheral seals about the frames for sealing a channel when the frame is disposed across it. The seals are arcuate in configuration and lie on a circle having its center at the center axis of the shaft. Rotation of the shaft selectively opens and closes alternate channels of the flue housing.
    Type: Grant
    Filed: August 15, 1980
    Date of Patent: November 30, 1982
    Assignee: Didier Engineering GmbH
    Inventors: Alfred Mertens, Franz Schafer