Patents by Inventor Sven Hjort

Sven Hjort 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).

  • Impeller apparatus
    Patent number: 4779990
    Abstract: An impeller apparatus for dispersing a gas into a liquid in a vessel includes a centrifugal flow turbine, the blades (621) of which are formed with a substantially stream-lined trailing surface terminated by a sharply pronounced spine (63). The blade is formed by a plate-like initial blank being cut to a shape having a central line of symmetry, the blank then being folded along the straight line of symmetry.
    Type: Grant
    Filed: November 21, 1986
    Date of Patent: October 25, 1988
    Inventors: Sven Hjort, Borje Skanberg