Patents by Inventor Karl L. Fahlen

Karl L. Fahlen 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).

  • Brush-beater roller for a vacuum cleaner
    Patent number: 4238870
    Abstract: A brush-beater roller for a vacuum cleaner in which the roller is elongated and is helically twisted about its longitudinal axis, said roller having elongated dovetail slots for accommodating a brush bristle holder, and a beater bar. The dovetail slots are arranged to receive radial projections on the integral belt pulley which correspond in shape to the dovetail slots. The roller further has means thereon for preventing the bristle holders from coming out of the dovetail slot upon rotation of the roller.
    Type: Grant
    Filed: July 16, 1979
    Date of Patent: December 16, 1980
    Assignee: Aktiebolaget Electrolux
    Inventor: Karl L. Fahlen