Patents by Inventor Hartmut Kroll

Hartmut Kroll 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: 4784823
    Abstract: There is described an apparatus for the corrosion protection of containers for the long time storage of radioactive materials, especially of spent fuel elements, in suitable geological formations which avoid corrosion of the container even with unexpected occurrence of water, or at least delay and minimize the corrosion. The apparatus consists essentially of sacrificial anodes 2 which are conductively joined to the containers 1 via connections 3.
    Type: Grant
    Filed: February 2, 1982
    Date of Patent: November 15, 1988
    Assignee: Nukem GmbH
    Inventors: Werner Holtmann, Hartmut Kroll, Gunther Luthardt, Volker Portscher
  • Patent number: 4476394
    Abstract: Known containers for the transportation and/or storage of irradiated fuel elements have insertion canisters made of steel or massive bodies of non-ferrous metals. These have a high weight and possess no neutron shielding effect. These disadvantages are avoided by making an insertion canister consisting of graphite.
    Type: Grant
    Filed: March 27, 1981
    Date of Patent: October 9, 1984
    Assignee: Transnuklear GmbH
    Inventors: Erhard Muller, Richard Christ, Hartmut Kroll
  • Patent number: 4456827
    Abstract: An improved container for transportation or storage of radioactive substances, especially spent nuclear fuel elements, has a cylindrical open-top thick-wall metallic body for shielding gamma radiation. A liner for the container has a top peripheral flange engaged with the bottom of a counterbore in the container open top. A thick gamma-ray shielding cover for the lining is disposed in the counterbore and screw means detachably secure both the lining flange and the cover to the body independently. The body has exterior generally parallel spaced cooling fins transversely intersected by flanges of lesser height to minimize fin cracks extending into the body. Neutron shielding is disposed in the exterior spaces between the fins and the flanges.
    Type: Grant
    Filed: July 10, 1981
    Date of Patent: June 26, 1984
    Assignee: Transnuklear GmbH
    Inventors: Werner Botzem, Reiner Laug, Hartmut Kroll, Elmar Schlich, Walter Anspach, Karl Brendel, Peter Srostlik
  • Patent number: 4453081
    Abstract: There are needed containers having an n-shielding for the transportation and storage or radioactive materials, especially irradiated fuel elements, which containers still remain intact even in extreme accidents and guarantees a good dissipation of heat. This is attained with containers which there is additionally arranged an n-shielding layer of a graphite material between the base body and the inner covering.
    Type: Grant
    Filed: March 27, 1981
    Date of Patent: June 5, 1984
    Assignee: Transnuklear GmbH
    Inventors: Richard Christ, Klaus Wegner, Hartmut Kroll
  • Patent number: 4451739
    Abstract: Containers for the transportation and/or storage of radioactive materials, particularly irradiated fuel elements needing a shielding for keeping back the radioactive rays. Previously known shieldings cannot be adjusted optimally to the activity of the material being transported. A good adjustment can be attained by applying the shielding entirely or partially as metal casing on the container.
    Type: Grant
    Filed: March 4, 1981
    Date of Patent: May 29, 1984
    Inventors: Richard Christ, Hartmut Kroll
  • Patent number: 4434373
    Abstract: For the conveying and storage of radioactive materials there are needed containers which shield .gamma. and neutron-radiation and draw off the heat of decay whereby there is desired a variable neutron shielding. This is obtained by a neutron shielding between the cooling fins of the container is formed as an elastic molded body.
    Type: Grant
    Filed: September 30, 1982
    Date of Patent: February 28, 1984
    Inventors: Richard Christ, Hartmut Kroll
  • Patent number: 4388268
    Abstract: Conveying and/or storage containers for radioactive materials which emit gamma and neutron radiation consist essentially of a container body having a shielding function for gamma radiation, cooling fins and a neutron shielding arranged between the cooling fins. For the protection of the neutron shielding it is provided with a cover.
    Type: Grant
    Filed: November 17, 1980
    Date of Patent: June 14, 1983
    Assignee: Transnuklear GmbH
    Inventors: Hans-Gunther Knackstedt, Erhard Muller, Richard Christ, Hartmut Kroll