Patents by Inventor Fred W. Hefren

Fred W. Hefren 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).

  • Patent number: 4225123
    Abstract: A snubber assembly for vehicles comprised of a housing attached to each of the main frame members of the vehicle chassis. A compression spring and compression rod is located with in the housing, with the rod having a free end which extends into fixed relationship respective to the vehicle axle. Movement between the chassis and the axle loads and unloads the compression spring, thereby enhancing the ride and stability of the vehicle. The snubber preferably is attached to the rear axle, and for maximum safety and additional comfort, another snubber is located at each of the fore and aft spring positions.
    Type: Grant
    Filed: January 16, 1979
    Date of Patent: September 30, 1980
    Inventor: Fred W. Hefren
  • Patent number: 3980315
    Abstract: A stabilizer apparatus which can be connected to the steering mechanism of a vehicle such that movement of the vehicle wheels from a neutral position is resisted by a spring assembly. A special grease filled housing protects the critical components thereof from the deleterious effects of the ambient conditions, as well as imparting the vehicle with desirable steering characteristics.
    Type: Grant
    Filed: April 14, 1975
    Date of Patent: September 14, 1976
    Inventor: Fred W. Hefren