Patents by Inventor Robert L. Hellens

Robert L. Hellens 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).

  • Hydraulic fuel hold down
    Patent number: 4164443
    Abstract: A nuclear reactor having a seal plate dividing the vessel into an upper high pressure plenum and a lower low pressure or outlet plenum. A piston is located at the seal plate with its upper surface exposed to the high pressure and its lower surface exposed to the lower pressure. A push rod attached to the piston extends downwardly in butting relationship with fuel assemblies to hold them down.
    Type: Grant
    Filed: May 4, 1977
    Date of Patent: August 14, 1979
    Assignee: Combustion Engineering, Inc.
    Inventors: John F. Gibbons, Robert L. Hellens