Patents by Inventor Voitto O. A. Reponen

Voitto O. A. Reponen 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).

  • Patent number: 4410337
    Abstract: Gas is removed from a fibre suspension of high consistency by means of an apparatus having a rotor chamber and a rotor disposed for rotation in the rotor chamber. The rotor has blades adapted to fluidize the fibre suspension and to cause a centrally located core of gas surrounded by a cylindrical layer of fibre suspension to form. The rotor has a plate located in the portion of the rotor opposite to the inlet of the rotor chamber which has an opening or openings close to the rotor axis. The gas is removed from the rotor chamber through the openings in the plate to a gas discharge and the fibre suspension essentially free of gas is discharged through an outlet. The operation of the apparatus is controlled by maintaining the pressure difference between the inlet and the gas discharge at a predetermined level.
    Type: Grant
    Filed: April 7, 1980
    Date of Patent: October 18, 1983
    Assignee: A. Ahlstrom Osakeyhtio
    Inventors: Johan Gullichsen, Jaakko P. Kujala, Toivo J. Niskanen, Voitto O. A. Reponen, Esko J. Harkonen