Patents by Inventor Dieter Lehnhart

Dieter Lehnhart 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).

  • Collar sleeves and process and tool for the manufacture thereof
    Patent number: 4122701
    Abstract: Collar sleeves lined with bearing material are manufactured by axially upsetting a prepared cylindrical sleeve in a die assembly tool that permits and controls axial thickening of the sleeve wall in the region of the desired collar.
    Type: Grant
    Filed: May 4, 1977
    Date of Patent: October 31, 1978
    Assignee: Glyco-Metall-Werke Daelen & Loos GmbH
    Inventor: Dieter Lehnhart
  • Collar sleeves and process and tool for the manufacture thereof
    Patent number: 4048703
    Abstract: Collar sleeves lined with bearing material are manufactured by axially upsetting a prepared cylindrical sleeve in a die assembly tool that permits and controls axial thickening of the sleeve wall in the region of the desired collar.
    Type: Grant
    Filed: February 14, 1975
    Date of Patent: September 20, 1977
    Assignee: Glyco-Metall-Werke Daelen & Loos GmbH
    Inventor: Dieter Lehnhart