Patents by Inventor Roger C. Nelson

Roger C. Nelson 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).

  • Vehicle suspension system
    Patent number: 6959936
    Abstract: A vehicle suspension system couples an axle to a vehicle frame so that the axle pivots about a first location with respect to the frame when the axle has a first range of articulation. The axle pivots about a second location with respect to the frame extending laterally out from the first location when the axle has a second range of articulation greater than the first range of articulation. When the axle exceeds the second range of articulation, the suspension system retains the axle in a substantially rigid contact with the vehicle frame.
    Type: Grant
    Filed: December 13, 2002
    Date of Patent: November 1, 2005
    Assignee: NMHG Oregon, Inc.
    Inventors: Clyde C. Anderson, Roger C. Nelson
  • Vehicle suspension system
    Publication number: 20040113383
    Abstract: A vehicle suspension system couples an axle to a vehicle frame so that the axle pivots about a first location with respect to the frame when the axle has a first range of articulation. The axle pivots about a second location with respect to the frame extending laterally out from the first location when the axle has a second range of articulation greater than the first range of articulation. When the axle exceeds the second range of articulation, the suspension system retains the axle in a substantially rigid contact with the vehicle frame.
    Type: Application
    Filed: December 13, 2002
    Publication date: June 17, 2004
    Applicant: NACCO Materials Handling Group, Inc.
    Inventors: Clyde C. Anderson, Roger C. Nelson
  • Doppler transducer probe with direction indicator
    Patent number: 5103825
    Abstract: Current-responsive light-emitting diodes of different colors are provided adjacent to the tip of the hand-held transducer probe of a medical Doppler device. Mechanism is provided to actuate the diodes of one color when the direction of internal body matter detected by the Doppler device is toward the probe and to actuate lights of a different color when the direction of detected internal body matter is away from the probe. In addition, power supply to the diodes is controlled so that increasing brightness indicates increasing velocity of the detected internal body matter.
    Type: Grant
    Filed: March 5, 1991
    Date of Patent: April 14, 1992
    Assignee: D. E. Hokanson, Inc.
    Inventors: D. Eugene Hokanson, Roger C. Nelson