Patents by Inventor Jan E. Hedman

Jan E. Hedman 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).

  • Container through which a gas flows, preferably a muffler, with fiberglass filling and method and apparatus for filling the same
    Patent number: 4569471
    Abstract: The invention relates to a container for fiberglass wool, as well as a method and apparatus for producing a continuous length of fiberglass wool and for filling the container through which a gas flows, e.g. a muffler, with said wool. The apparatus comprises a feeder means which advances multifiber thread to a nozzle into which compressed air is blown which imparts movement to the thread at the same time as the fibers of the thread are blown apart and entangled so as to form continuous wool. The wool is blown directly into the container while air is evacuated by a suction fan.
    Type: Grant
    Filed: March 22, 1983
    Date of Patent: February 11, 1986
    Assignee: AB Volvo
    Inventors: Bengt-Erik Ingemansson, Bertil E. Bjork, Jan E. Hedman, Knut G. Knutsson, Nils H. I. Larsson