Patents by Inventor Toivo Niskanen

Toivo Niskanen 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).

  • Method and apparatus for pumping gaseous liquids and separating the gaseous components therefrom
    Patent number: 4273562
    Abstract: A method and apparatus for pumping gaseous liquids in a centrifugal pump having a rotary impeller with an opening through the impeller. Liquid flowing into the pump is divided into two fluid streams at the impeller, one stream being the radial flow to the high pressure discharge part and the other stream containing the greater part of the gaseous component and directed to flow through the impeller opening. The impeller has surfaces that extend into this opening to positively drive therethrough the gaseous component stream.
    Type: Grant
    Filed: October 1, 1979
    Date of Patent: June 16, 1981
    Assignee: A. Ahlstrom Osakeyhtio
    Inventor: Toivo Niskanen