Patents by Inventor Geraldo J. A. Costa

Geraldo J. A. Costa 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).

  • Combined machine for opening and plugging a taphole in a shaft furnace
    Patent number: 5395095
    Abstract: A combined machine for opening a taphole in a shaft furnace and for plugging the taphole with a plugging mass is presented. The machine comprises a mount, a suspension structure for the mount, drive means on the mount and a plugging device. The plugging device portion of the machine comprises a plugging chamber, plugging snout and a piston for expelling the plugging mass. For the plugging operation, the plugging device is supported on the mount in the extension of the axis of the taphole and the expulsion piston is coupled to the drive means already present on the mount for opening the taphole with a piercing rod or a drill bit.
    Type: Grant
    Filed: December 16, 1993
    Date of Patent: March 7, 1995
    Assignee: Paul Wurth S.A.
    Inventors: Pietro Marino, Geraldo J. A. Costa, Luiz F. Evangelista, Jean Monai