Patents by Inventor Theodore W. Spaetgens

Theodore W. Spaetgens 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).

  • Tuned torsional vibration damper
    Patent number: 4160390
    Abstract: A viscous torsional vibration damper is provided for a rotatable shaft. A hub is attachable to the shaft. A housing is connected to the hub and has an internal chamber. An inertia disc is within the chamber and a fluid damping medium is placed between the inertia disc and the housing. A first set of springs for tuning the damper are connected between the housing and the hub and a second set of springs for tuning the damper are provided between the disc and the housing. One set of springs comprises spoke springs fixedly connected at each end.
    Type: Grant
    Filed: June 16, 1977
    Date of Patent: July 10, 1979
    Inventor: Theodore W. Spaetgens