Patents by Inventor Torsten Hedberg

Torsten Hedberg 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).

  • Flotation apparatus and process
    Patent number: 6217777
    Abstract: Flotation apparatus (1) for the purification of polluted water, comprising a flotation vessel (3) having an inlet means (23) for supplying polluted water to said vessel, an assembly (41) of spaced elements (43, 65) defining passages for the flow of water through said elements, and outlet means for surface sludge (15, 17) and outlet means (39, 45; 57, 61) for treated water, further comprising flow directing means for forcing the incoming polluted water to reach a level above said assembly (41) and to flow downwardly through said assembly and towards said treated water outlet means (39, 45; 57, 61); and a process for the purification of polluted water by flotation performed in such apparatus.
    Type: Grant
    Filed: June 19, 1998
    Date of Patent: April 17, 2001
    Assignee: AW Creative Technologies Limited
    Inventors: Jan Dahlquist, Torsten Hedberg