Patents by Inventor Alf Lundström

Alf Lundström 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).

  • Device for submerging material into liquid metal by an electromagnetic stirrer
    Patent number: 8043403
    Abstract: A furnace plant including at least one furnace vessel comprising side walls, a bottom and a roof. At least one heater is configured to heat metal in the furnace vessel. A compartment includes sidewalls lined with refractory material. The compartment forms an extension of the furnace vessel. At least one electromagnetic stirrer is arranged outside and adjacent to the compartment. A refractory plate is arranged inside the compartment. The refractory plate includes an upper edge configured to be positioned below a meniscus of molten metal and includes a lower edge positioned spaced apart from a bottom of the compartment. The plate is arranged such that a gap between the plate and a wall of the compartment increases toward the bottom of the compartment.
    Type: Grant
    Filed: October 9, 2008
    Date of Patent: October 25, 2011
    Assignee: ABB AB
    Inventors: Bengt Rydholm, Erik Svensson, Alf Lundström, Helmut Hackl, Olof Sjödén, Jan-Erik Eriksson, Tord Kroon, Tord Lindblad
  • DEVICE FOR SUBMERGING MATERIAL INTO LIQUID METAL BY AN ELECTROMAGNETIC STIRRER
    Publication number: 20100236362
    Abstract: A furnace plant including at least one furnace vessel comprising side walls, a bottom and a roof. At least one heater is configured to heat metal in the furnace vessel. A compartment includes sidewalls lined with refractory material. The compartment forms an extension of the furnace vessel. At least one electromagnetic stirrer is arranged outside and adjacent to the compartment. A refractory plate is arranged inside the compartment. The refractory plate includes an upper edge configured to be positioned below a meniscus of molten metal and includes a lower edge positioned spaced apart from a bottom of the compartment. The plate is arranged such that a gap between the plate and a wall of the compartment increases toward the bottom of the compartment.
    Type: Application
    Filed: October 9, 2008
    Publication date: September 23, 2010
    Applicant: ABB AB
    Inventors: Bengt Rydholm, Erik Svensson, Alf Lundström, Helmut Hackl, Olof Sjödén, Jan-Erik Eriksson, Tord Kroon, Tord Lindblad
  • Channel inductor and melt furnace comprising such channel inductor
    Patent number: 6208682
    Abstract: A channel inductor and a furnace for melting, holding or refining metal. The channel inductor has a closed-loop core, a primary winding arranged around the core and a refractory lining in which the winding and core is partly enclosed and in which an inductor channel is formed. The channel inductor also has a detector to detect metal penetration of the refractory lining.
    Type: Grant
    Filed: December 16, 1999
    Date of Patent: March 27, 2001
    Assignee: ABB AB
    Inventors: Åke Archenholtz, Jan Bostedt, Arne Löfgren, Gote Tallback, Saeid Ebrahim, Alf Lundström