Patents by Inventor Willi Tropper

Willi Tropper 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).

  • Power steering system for motor vehicles
    Patent number: 6871562
    Abstract: For a power steering system which has, as a recirculating ball steering, a worm shaft and, enclosing this, a working plunger which is to be actuated by a bead chain axially shiftably with respect to the worm shaft, an axial seal is provided for the annular gap between the working plunger and the worm shaft which has a multi-part arrangement, and which has two support rings and one sealing ring, engaging between the support rings, pointing in opposite directions and guided in an annular grove of the working plunger, the width of the annular groove being greater than the axial width of the axial seal at the support rings arranged adjacent to the sealing ring.
    Type: Grant
    Filed: March 3, 2003
    Date of Patent: March 29, 2005
    Assignee: ZF Lenksysteme GmbH
    Inventor: Willi Tropper
  • Power steering system for motor vehicles
    Publication number: 20040020705
    Abstract: For a power steering system which has, as a recirculating ball steering, a worm shaft and, enclosing this, a working plunger which is to be actuated by a bead chain axially shiftably with respect to the worm shaft, an axial seal is provided for the annular gap between the working plunger and the worm shaft which has a multi-part arrangement, and which has two support rings and one sealing ring, engaging between the support rings, pointing in opposite directions and guided in an annular grove of the working plunger, the width of the annular groove being greater than the axial width of the axial seal at the support rings arranged adjacent to the sealing ring.
    Type: Application
    Filed: March 3, 2003
    Publication date: February 5, 2004
    Inventor: Willi Tropper