Patents by Inventor David J. Ruether

David J. Ruether 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).

  • Magnet field symmetry for hall sensor
    Patent number: 6937007
    Abstract: A method for balancing the flux density of a permanent magnet includes sensing flux density in a permanent magnet and if unbalanced relative to a physical center, adjusting the cross-sectional area and shape of the magnet by removing magnetic material from the magnetic pole with the stronger magnetic flux density. This method is repeated until the magnetic flux density is balanced between the opposite poles of the permanent magnet relative to the physical center.
    Type: Grant
    Filed: April 7, 2003
    Date of Patent: August 30, 2005
    Assignee: Sauer-Danfoss Inc.
    Inventors: David J. Ruether, Joseph J. Schottler