Patents by Inventor Bent Alvsten

Bent Alvsten 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).

  • Coil and core structure for an induction cooktop
    Patent number: 6288374
    Abstract: Cooking ranges using heating by eddy currents caused by induction of high frequency energy are known, but they have losses caused by leakage fields. The invention provides heating unit in which the magnet coils are integrated into magnetic circuit where the field is collected due to the disposition of the core. A preferred embodiment utilizes magnetic concrete for core parts with chambers for the coils. There may advantageously be cast a covering layer which is thin and wear resistant but still strong, because it is everywhere supported by the material.
    Type: Grant
    Filed: July 13, 1995
    Date of Patent: September 11, 2001
    Assignee: A/S Ernst Voss Fabrik
    Inventors: Christian Eskildsen, Keld Christensen, Bent Alvsten