Patents by Inventor Johann Vitzthum

Johann Vitzthum 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).

  • Slit cage, particularly for needle bearings
    Patent number: 5044787
    Abstract: A cage, particularly for needle bearings, is an annular ring of springy cage material and has a slit extending completely through the cage. The opposed, separated ends of the cage at the slit are joined by a pair of elastic connecting arms which are each approximately of V-shape and having vertices which extend axially and either face toward each other or face away from each other, which permits circumferential shifting and inhibits relative axial shifting of the separated cage ends and prevents overlap at the cage ends.
    Type: Grant
    Filed: January 8, 1990
    Date of Patent: September 3, 1991
    Assignee: FAG Kugelfischer Georg Schafer (KGaA)
    Inventors: Georg Hupfer, Johann Vitzthum, Roland Tischer