Patents by Inventor Franz Mim

Franz Mim 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).

  • Device for damping vibrations of a drilling tube
    Patent number: 4305264
    Abstract: A device for damping vibrations of a drilling tube by the slip between the ube and a fly-wheel which surrounds the tube and is frictionally connected to the tube by a slotted sleeve which is axially displaceable by adjusting means for adjusting the frictional connection. The adjusting means are connected to the sleeve by bearings so that they can be actuated while the tube and hence the sleeve and the fly-wheel are rotating during drilling.
    Type: Grant
    Filed: December 4, 1979
    Date of Patent: December 15, 1981
    Assignee: Gebruder Heller Verwaltungsgesellschaft mit beschrankter Haftung
    Inventor: Franz Mim