Patents by Inventor Fridtjof E. T. Kelling

Fridtjof E. T. Kelling 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).

  • Centrifuge for separating helium from natural gas
    Patent number: 4182480
    Abstract: Centrifuge for the separation of gaseous mixtures with a rotor inside a housing, comprising a hollow, cylindrical or nearly cylindrical rotorpart also called a separating drum, in which drum a gaseous component may condense as a liquid. This liquid is admitted thereafter through openings in the drum to the space between drum and housing. In this space are formed a sequence of narrow openings, so called restrictors in which the liquid is brought to expansion, returning to gas form.These restrictors act also as bearings for the drum. The gaseous component that does not liquefy in the drum is drawn off.
    Type: Grant
    Filed: June 2, 1977
    Date of Patent: January 8, 1980
    Assignee: Ultra Centrifuge Nederland N.V.
    Inventors: Frederik H. Theyse, Fridtjof E. T. Kelling