Patents by Inventor Detlef Schellack

Detlef Schellack 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).

  • Method for producing a housing for a ball joint
    Patent number: 6735997
    Abstract: A process is provided for manufacturing a ball-and-socket joint housing by cold forming from a blank (R), which is preferably produced from a bar or wire material and is prepared for forming. A first axial depression (1) with a diameter (D1) is first prepared by reverse cup extrusion. A second axial depression (2) with a comparatively larger diameter (D2) is subsequently prepared in the axial depression (1) by reverse cup extrusion. A diameter reduction (D3) also of the first axial depression (1) is formed in some sections by the deformation of the material during the second reverse cup extrusion.
    Type: Grant
    Filed: August 26, 2002
    Date of Patent: May 18, 2004
    Assignee: ZF Lemförder Metallwaren AG
    Inventors: Klaus Rosenberger, Markus Thölking, Detlef Schellack
  • Method for producing a housing for a ball joint
    Publication number: 20030074947
    Abstract: A process is provided for manufacturing a ball-and-socket joint housing by cold forming from a blank (R), which is preferably produced from a bar or wire material and is prepared for forming. A first axial depression (1) with a diameter (D1) is first prepared by reverse cup extrusion. A second axial depression (2) with a comparatively larger diameter (D2) is subsequently prepared in the axial depression (1) by reverse cup extrusion. A diameter reduction (D3) also of the first axial depression (1) is formed in some sections by the deformation of the material during the second reverse cup extrusion.
    Type: Application
    Filed: August 26, 2002
    Publication date: April 24, 2003
    Inventors: Klaus Rosenberger, Markus Tholking, Detlef Schellack