Patents by Inventor Rolf Kirsch

Rolf Kirsch 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).

  • Flexible conduit for the exhaust line for an internal combustion engine
    Patent number: 5482089
    Abstract: A flexible conduit for the exhaust line of an internal combustion engine includes a flexurally supple tube having several helical corrugations of equal pitch and a flexible supporting coil spring having its ends fixedly connected to flanges at opposite ends of the tube and which is frictionally received in the trough of one of the helical corrugations.
    Type: Grant
    Filed: November 29, 1994
    Date of Patent: January 9, 1996
    Assignee: Volkswagen AG
    Inventors: Otto Weber, Siegfried Grohnert, Rolf Kirsch