Patents by Inventor Hans J. Pohlmann

Hans J. Pohlmann 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).

  • Recuperative heat exchanger of ceramic material
    Patent number: 4321964
    Abstract: The invention relates to a recuperative heat exchanger comprising an elongate rotationally symmetric body of ceramic material having radially outwardly extending, flow channels of slot like cross-section extending along the axis of the body. Alternate flow channels extend further toward the surface of the body and further toward the axis of the body, respectively. Inlet and outlet openings are provided for the flow channels about at the ends of the body. The invention also comprises a process for making such a heat exchanger, including extruding ceramic material through an extrusion nozzle with a free cross-section in which core bodies are shaped and positioned for generating the flow channels and inner and outer cover walls defining the flow channels. The invention further comprises the extrusion nozzle in which the process is performed.
    Type: Grant
    Filed: June 1, 1979
    Date of Patent: March 30, 1982
    Assignee: Kernforschungsanlage Julich Gesellschaft mit Berschrankter Haftung, Rosenthal Technik AG
    Inventors: Siegfried Forster, Axel Krauth, Horst R. Maier, Hans J. Pohlmann
  • Refractory articles and composite metal-ceramic articles (cermets) prepared from a silicate-containing aluminum titanate
    Patent number: 4277539
    Abstract: Refractory products such as foundry articles and composite metal-ceramic articles are prepared from a sepiolite (2 MgO.3SiO.sub.2.2H.sub.2 O) and silicate containing aluminum titanate.
    Type: Grant
    Filed: May 2, 1980
    Date of Patent: July 7, 1981
    Assignee: Rosenthal Technik AG
    Inventors: Hartmut Keller, Axel Krauth, Horst R. Maier, Horst Nink, Hans J. Pohlmann, Horst Reddig, Johann Siebels