Patents by Inventor Karl A. Thomassen

Karl A. Thomassen 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).

  • Electric motor
    Patent number: 5994811
    Abstract: An electric motor comprising two separate and coaxially spaced armatures as well as a magnet-equipped rotor arranged between the two armatures. One armature is fixed to a motor housing being a static armature, while the other armature is free to rotate, having the motor output shaft as a central and integral part thereof. The rotor operates as a rotor for both armatures having magnet pole pairs on both sides for interaction with each respective armature. Thus, the motor comprises two part-motors having a common rotor.
    Type: Grant
    Filed: June 22, 1998
    Date of Patent: November 30, 1999
    Assignee: Electret AS
    Inventor: Karl A. Thomassen