Patents by Inventor Ralf Oppel

Ralf Oppel 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).

  • Camshaft arrangement and method for producing it
    Patent number: 5168772
    Abstract: A camshaft has a cam arrangement with a projection and recess coupling the camshaft with a cam member which permits limited relative angular motion between them. The cam arrangement includes a hollow cylinder affixed to the shaft with a projection received in a recess in the cam member. The cam member and the hollow cylinder are held together by rings at their end faces into a pre-assembled unit which is slid on and affixed to the camshaft.
    Type: Grant
    Filed: January 11, 1991
    Date of Patent: December 8, 1992
    Assignee: Volkswagen AG
    Inventors: Panagiotis Adamis, Ralf Oppel