Patents by Inventor Stig-Erik Hulthom

Stig-Erik Hulthom 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 forming controlled vortexes and for recirculating gas
    Patent number: 5549854
    Abstract: The invention relates to a method for forming controlled vortexes and for circulating gas thereby in a reactor (1, 15) containing liquid or a suspension of liquid and solids. Into the reactor there is also fed gas, so that the liquid is set into a turbulent motion by means of mixers (4, 17, 18) and flow baffles (6, 17, 19). By means of adjustable flow baffles (6, 19), there are created in the reactor at least two vortexes (10), external to the mixer shaft, for sucking gas from the suspension surface into the liquid phase.
    Type: Grant
    Filed: May 16, 1995
    Date of Patent: August 27, 1996
    Assignee: Outokumpu Engineering Contractors Oy
    Inventors: Stig-Erik Hulthom, Launo L. Lilja, Valto J. Makitalo, Bror G. Nyman