Patents by Inventor Dennis E. Hedenberg

Dennis E. Hedenberg 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 air suspension system
    Patent number: 5351986
    Abstract: An air suspension system for a vehicle such as a pick-up truck, wherein an air spring is mounted directly on the leaf spring of the vehicle and the air spring and leaf spring support the weight of the vehicle frame and load, effectively in series. The combination of the air spring and leaf spring provides a reduction in ride vibration whereby the vehicle rides as smoothly when it is unloaded as when it is carrying a load.
    Type: Grant
    Filed: April 14, 1993
    Date of Patent: October 4, 1994
    Inventors: William E. Hedenberg, Dennis E. Hedenberg