Patents by Inventor Fredrick Althoff

Fredrick Althoff 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).

  • Sensor and method for measuring torque and/or axial stresses
    Patent number: 5386733
    Abstract: The present invention relates to a sensor and to a method for measuring torque and/or axial stresses applied to an object as well as a method for manufacturing magnetoelastic material to be used therefore. The sensor (20) comprises a magnetoelastic material and a sensing device (210) for non-contactingly sensing changes in permeability of the magnetoelastic material due to torque and/or axial stresses, said sensing device (310) comprising a coil system carrying out both an excitation and a pick-up function. The excitation frequency is so chosen that the pre-dominating process of magnetization of the magnetoelastic material will be small angle magnetization rotation, the excitation frequency being at least 300 kHz.
    Type: Grant
    Filed: June 29, 1992
    Date of Patent: February 7, 1995
    Assignee: Scan Sense A/S
    Inventors: Tore Hesthamar, Fredrick Althoff, Thomas Larsson