Patents by Inventor Rolf Gronnerud

Rolf Gronnerud 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).

  • Helical flow heat exchanger having individually adjustable baffles
    Patent number: 4493368
    Abstract: A shell and tube heat exchanger includes a central pipe situated in the shell and provided with a number of individually adjustable baffles. An entire bundle of tubes is built around the central pipe. The baffles are movable with respect to the central pipe by means of a pull-push rod positioned in the central pipe.
    Type: Grant
    Filed: June 8, 1982
    Date of Patent: January 15, 1985
    Assignee: Norsk Hydro a.s.
    Inventors: Rolf Gronnerud, Einar Boe