Patents by Inventor Frank MacKert

Frank MacKert 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).

  • Vibration damper with amplitude-dependent damping force
    Patent number: 7172058
    Abstract: Vibration damper with amplitude-dependent damping force includes a cylinder, in which a piston rod, carrying a piston, is guided with freedom of axial movement, where the piston divides the cylinder into a working space on the piston rod side and a working space on the side away from the piston rod. The piston rod carries at least part of a housing, which is mounted in the direction of the piston rod-side working space, and where a separating body is supported inside the housing with freedom to slide. The separating body divides the housing into first and second working chambers, where the first working chamber is connected by at least one radial connecting opening to the piston rod-side working space and the second working chamber is connected by a connecting channel to the working space on the side away from the piston rod. At least a part of the housing is connected to the piston rod by a weld.
    Type: Grant
    Filed: November 19, 2004
    Date of Patent: February 6, 2007
    Assignee: ZF Friedrichshafen AG
    Inventors: Gunnar Burkert, Andreas Förster, Heinz-Joachim Gilsdorf, Hans Gonschorrek, Frank MacKert, Thomas Kiefer, Klaus Sauer
  • Vibration damper with amplitude-dependent damping force
    Publication number: 20050109571
    Abstract: Vibration damper with amplitude-dependent damping force includes a cylinder, in which a piston rod, carrying a piston, is guided with freedom of axial movement, where the piston divides the cylinder into a working space on the piston rod side and a working space on the side away from the piston rod. The piston rod carries at least part of a housing, which is mounted in the direction of the piston rod-side working space, and where a separating body is supported inside the housing with freedom to slide. The separating body divides the housing into first and second working chambers, where the first working chamber is connected by at least one radial connecting opening to the piston rod-side working space and the second working chamber is connected by a connecting channel to the working space on the side away from the piston rod. At least a part of the housing is connected to the piston rod by a weld.
    Type: Application
    Filed: November 19, 2004
    Publication date: May 26, 2005
    Inventors: Gunnar Burkert, Andreas Forster, Heinz-Joachim Gilsdorf, Hans Gonschorrek, Frank MacKert, Thomas Kiefer, Klaus Sauer