Patents by Inventor Hermann Vollmer

Hermann Vollmer 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: 5081976
    Abstract: A bucket tappet for an internal combustion engine with overhead camshaft comprises a hollow cylindrical tappet shank made of an aluminum material which is closed at one end by a baseplate made of a steel or hard metal material. A guide bush for accommodating a play-compensating element is arranged inside the tappet shank and is concentric to the longitudinal center axis. In order to obtain a permanent connection between the baseplate and the tappet shank, a steel material carrier element is embedded in the tappet shank and the baseplate is secured by soldering or welding to the carrier element.
    Type: Grant
    Filed: June 18, 1990
    Date of Patent: January 21, 1992
    Assignee: Mercedes-Benz AG
    Inventors: Rolf-Wolfram Dahm, Hermann Vollmer, Erwin Wolf