Patents by Inventor Donald R. Precechtel

Donald R. Precechtel 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).

  • Inlet nozzle assembly
    Patent number: 4654194
    Abstract: An inlet nozzle assembly for directing coolant into the duct tube of a fuel assembly attached thereto. The nozzle assembly includes a shell for housing separable components including an orifice plate assembly, a neutron shield block, a neutron shield plug, and a diffuser block. The orifice plate assembly includes a plurality of stacked plates of differently configurated and sized openings for directing coolant therethrough in a predesigned flow pattern.
    Type: Grant
    Filed: September 9, 1985
    Date of Patent: March 31, 1987
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: David W. Christiansen, Richard A. Karnesky, Donald R. Precechtel, Bob G. Smith, Ronald C. Knight