Patents by Inventor Gerald D. Evrard

Gerald D. Evrard 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 wall coke build-up removal device
    Patent number: 4279052
    Abstract: This invention relates to a device for cleaning opposed walls of a furnace pit. The device comprises a plurality of rotating screw-type cutters for removing built-up deposits upon the opposed walls of the furnace pit, a plurality of linkage arms for carrying the plurality of rotating screw-type cutters, a plurality of air motors for independently adjusting the speed of each half of the plurality of rotating screw-type cutters along each opposed wall of the furnace pit, and universal joints for allowing floating adjustment of each of the plurality of rotating screw-type cutters against each opposed wall of the furnace pit.
    Type: Grant
    Filed: February 8, 1980
    Date of Patent: July 21, 1981
    Assignees: Southwire Co., National Steel Corp.
    Inventors: Gerald D. Evrard, Henry S. Cook, Anthony J. Kamalich