Patents by Inventor Franz Ammann

Franz Ammann 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: 20100313913
    Abstract: A physical-chemical method for cleaning a secondary chamber of a heat exchanger in a nuclear facility, includes drying the secondary chamber and introducing a cleaning solution into the secondary chamber to treat deposits present in the secondary chamber.
    Type: Application
    Filed: June 16, 2010
    Publication date: December 16, 2010
    Applicant: Areva NP GmbH
    Inventors: Ursula Hollwedel, Franz Ammann
  • Publication number: 20100288707
    Abstract: A method is provided for conditioning a waste solution obtained during the wet-chemical cleaning of conventional or nuclear plants and containing organic substances and metals in ionic form. At least a portion of the organic substance is degraded by electrochemical treatment or UV radiation of the waste solution, at least one metal precipitates by the addition of phosphoric acid and a resultant phosphate precipitate is removed from the waste solution.
    Type: Application
    Filed: July 27, 2010
    Publication date: November 18, 2010
    Applicant: AREVA NP GMBH
    Inventors: CHRISTIAN TOPF, SILVIA SCHUSS, FRANZ AMMANN
  • Patent number: 6308774
    Abstract: A method for the cleaning of heat exchange tubes and a collecting device for the collection of deposits from heat exchange tubes, include releasing deposits and collecting the deposits with a collecting vessel. The collecting vessel has an inlet orifice that completely encloses the underside of a tube plate in which exit-side tube ends are disposed. The collecting vessel has an inflatable hose for sealing off the collecting vessel. The collecting vessel is capable of being folded together, so that it can be introduced through a service orifice into the heat exchanger. The collecting vessel provides simple handling and positioning and serves, in particular, for use in a nuclear plant.
    Type: Grant
    Filed: August 19, 1999
    Date of Patent: October 30, 2001
    Assignee: Siemens Aktiengesellschaft
    Inventors: Georg Krämer, Franz Ammann
  • Patent number: 5883512
    Abstract: A method for checking heat exchanger tubes of metallic material includes drying inner surfaces of the heat exchanger tubes. A compressed air-abrasive mixture is then led through the heat exchanger tubes. An eddy-current integrity test of the heat exchanger tubes is then performed.
    Type: Grant
    Filed: October 25, 1996
    Date of Patent: March 16, 1999
    Assignee: Siemens Aktiengesellschaft
    Inventors: Klaus Streit, Franz Ammann