Patents by Inventor Walter Theobald

Walter Theobald 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: 5409087
    Abstract: A hydraulic dashpot for motor vehicles. It has a cylinder that accommodates a fluid. A shock-absorbing piston travels back and forth in the cylinder and divides it into two displacement chambers. The piston is connected to a rod that extends through a centering component at one end of the cylinder. A hydraulic decompression-stroke limiter consists of a cup-shaped recess below the rod-centering component and of another piston on the piston rod above the shock-absorbing piston. Channels extend through the stroke-limiting piston and are blocked off in the decompression-stroke direction. The object is a less expensive dashpot. The stroke-limiting piston consists of a thin stroke-limiting disk with a diameter slightly shorter than the critical diameter of the recess and resting on a thicker support.
    Type: Grant
    Filed: June 3, 1994
    Date of Patent: April 25, 1995
    Assignee: August Bilstein GmbH & Co. KG
    Inventors: Rolf Angermann, Reinhard Holscher, Volker Hansemann, Berthold Kolz, Walter Theobald, Friedrich Wiegand