Patents Assigned to Electret AS
  • 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