Patents by Inventor Bernhard Ruhnke

Bernhard Ruhnke 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).

  • Publication number: 20100140573
    Abstract: Represented and described is a lifting device having a housing, a lifting spindle that is cylindrical and has an external thread on the outer surface, a threaded bush that surrounds the lifting spindle and has an internal thread that is in engagement with the external thread and a drive unit for the rotating drive of the threaded bush, wherein the lifting spindle is mounted in the housing so as to be displaceable in its axial direction and non-rotatable. The object to provide a lifting device that has as short an installation length as possible in the axial direction of the lifting spindle is achieved in that the lifting spindle is in the form of a hollow cylinder, in that a dome is located in the interior of the lifting spindle and is connected in a non-rotatable manner to the housing and in that the lifting spindle is mounted on the dome so as to be non-rotatable and axially displaceable.
    Type: Application
    Filed: December 8, 2009
    Publication date: June 10, 2010
    Applicant: GKSS-Forschungszentrum Geesthacht GmbH
    Inventors: Dirk Jan Siemers, Bernhard Ruhnke