Patents by Inventor Gunther-Heinrich Trautmann

Gunther-Heinrich Trautmann 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).

  • Workpiece spindle device for a machine tool
    Patent number: 6038948
    Abstract: A workpiece spindle device for a machine tool having a drivable workpiece spindle in a spindle housing and including a hydraulic oil supply device with a non-rotating housing portion connected to the spindle housing. An oil control device is connected to the non-rotating housing and communicated to the oil supply device without an oil line therebetween. An oil flow path is provided between the oil control device and a cylinder chamber of a workpiece clamping cylinder of the spindle with the oil path being free of any valve and thus substantially unrestricted to oil flow.
    Type: Grant
    Filed: March 10, 1999
    Date of Patent: March 21, 2000
    Assignee: Index-Werke GmbH & Co. KG Hahn & Tessky
    Inventors: Helmut Friedrich Link, Gunther-Heinrich Trautmann