Patents by Inventor Kenneth Josefsson

Kenneth Josefsson 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 of and apparatus for controlling the flow rate of outstreaming liquid metal from an inductively heated ladle
    Patent number: 5207285
    Abstract: A method and an apparatus for accurately weighing by a ladle weighing unit (2) of a metal melt in a ladle (3), in which the melt can be heated and stirred by power supplied by an induction coil (4). The induction field of the coil (4) is also applied to a coil weighing unit (1) so that the reaction force of the magnetic field influencing the melt is measured. In a weighing system (5), the net weight of melt is calculated by subtracting the signal of the coil weighing unit (1) from that of the ladle weighing unit (2). The weight change per time unit, which represents the mass flow rate of melt from the ladle, is calculated in the control system (6) and is used to control the pressure in the ladle in such a way the metal flow is kept constant.
    Type: Grant
    Filed: June 3, 1991
    Date of Patent: May 4, 1993
    Assignee: Sandvik AB
    Inventor: Kenneth Josefsson