Patents by Inventor Dirk Jan Siemers

Dirk Jan Siemers 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).

  • Patent number: 10989823
    Abstract: The present invention relates to a neutron detector that for the first time permits the construction of large detector areas of approximately 1 m2 to 2 m2, with a spatial resolution of the neutrons of under 2 mm. It is additionally possible in the case of the modular construction in a stack arrangement to attain detection sensitivities that are comparable to 3He counter tubes (ca. 60%) or, with a greater number of detector elements, higher. By using thin substrate plates—such as aluminum sheets—and omission of the external pressure vessels, the neutron detectors are relatively lightweight despite their large dimensions and can be produced inexpensively.
    Type: Grant
    Filed: July 19, 2018
    Date of Patent: April 27, 2021
    Inventors: Jörg Burmester, Gregor Jacek Nowak, Jörn Plewka, Christian Jacobsen, Carsten Peter Gregersen, Wolfgang Puls, Andreas Beldowski, Dirk Jan Siemers, Rüdiger Kiehn, Sven Kleeband, Thorsten Böttcher, Gerd Musielak, Erik Sitko, John Hedde
  • Publication number: 20210096272
    Abstract: The present invention relates to a neutron detector that for the first time permits the construction of large detector areas of approximately 1 m2 to 2 m2, with a spatial resolution of the neutrons of under 2 mm. It is additionally possible in the case of the modular construction in a stack arrangement to attain detection sensitivities that are comparable to 3He counter tubes (ca. 60%) or, with a greater number of detector elements, higher. By using thin substrate plates—such as aluminum sheets—and omission of the external pressure vessels, the neutron detectors are relatively lightweight despite their large dimensions and can be produced inexpensively.
    Type: Application
    Filed: July 19, 2018
    Publication date: April 1, 2021
    Inventors: Jörg Burmester, Gregor Jacek Nowak, Jörn Plewka, Christian Jacobsen, Carsten Peter Gregersen, Wolfgang Puls, Andreas Beldowski, Dirk Jan Siemers, Rüdiger Kiehn, Sven Kleeband, Thorsten Böttcher, Gerd Musielak, Erik Sitko, John Hedde
  • 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