Patents by Inventor Bengt J. F. Norrman

Bengt J. F. Norrman 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).

  • Method and device providing mobility to a contact shoe independent of an electrode in an electric-arc furnace
    Patent number: 4458352
    Abstract: A method and device for facilitating the maintenance and replacing of the contact shoes of the electrodes in an electric-arc furnace, the supporting mantle of the contact shoes consisting of two sections, the lower one of which can be lifted, together with the contact shoes, telescopically over the upper section, whereby the contact shoes rise above the furnace hood.
    Type: Grant
    Filed: January 4, 1982
    Date of Patent: July 3, 1984
    Assignee: Outokumpu Oy
    Inventors: Frans H. Tuovinen, Risto M. Heikkila, Martti J. Jankkila, Bengt J. F. Norrman, Matti E. Honkaniemi
  • Method of mixing a hot furnace gas with another gas before the removal of the furnace gas from the furnace and a hood therefore
    Patent number: 4443878
    Abstract: A method and a hood for mixing a hot furnace gas with a second gas before the furnace gas is discharged from a furnace by directing the hot furnace gases out via a hood which forms an uninterrupted space for gas with the furnace is disclosed in which the second gas is fed along the side walls of the hood substantially countercurrently in relation to the hot gases emerging from the furnace in order to mix the gases with each other into a toroidal vortex, and that the gases are removed from this vortex tangentially.
    Type: Grant
    Filed: June 8, 1981
    Date of Patent: April 17, 1984
    Assignee: Outokumpu Oy
    Inventors: Frans H. Tuovinen, Bengt J. F. Norrman, Risto M. Heikkila