Patents by Inventor Bengt Willberg

Bengt Willberg 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: 5491996
    Abstract: A stabilizer bar or a similar metallic tube product for vehicles, has a central portion and at least two bent portions forming legs. The bar includes a thick-walled metallic tube having in the central portion a wall thickness and outside diameter in a ratio amounting to at least 1/10. This tube has an outside wall portion bent with a restricted thinning, ranging from about 5 to 15%. The bent portions are bent with an average bending radius of curvature in the range from about 1.4 to 2.1 times the outside diameter of the tube. Apparatus and methods can manufacture stabilizer bars or similar tubular metallic products of the foregoing type. For example, a method includes the steps of fitting to a bending arm one end of the thick-walled metallic tube. An inside wall portion of the tube has a radial spacing from a bending center of curvature, no greater than the length of the bending arm. The tube and the heating zone move relatively, with the heating zone advancing along the tube.
    Type: Grant
    Filed: October 5, 1992
    Date of Patent: February 20, 1996
    Assignee: Imatra Steel OY AB
    Inventors: Goran Baarman, Bengt Willberg