Patents by Inventor Fredrick R. Johanson

Fredrick R. Johanson 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).

  • Method and apparatus for maximizing utilization of an electric motor under load
    Patent number: 4659976
    Abstract: The present invention relates to an electronic device that is used to calculate the actual torque being produced by an electric motor at any instant in time and comparing this value of torque ratiometrically either with the maximum (peak) torque that the motor could produce under the line voltage available at that instant or with rated motor torque, thus giving an indication of whether the motor is approaching stall or is under utilized or over utilized.
    Type: Grant
    Filed: April 24, 1985
    Date of Patent: April 21, 1987
    Assignee: Dresser Industries, Inc.
    Inventor: Fredrick R. Johanson