Patents by Inventor Lars Bjarne Johansen

Lars Bjarne Johansen 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).

  • Vacuum sewer system including a collecting tank
    Patent number: 4034421
    Abstract: In a vacuum sewer system a tank is provided for the collection of liquid-mixed wastes, especially from water closets, the tank comprising a circulating pump whose inlet and outlet are connected to the tank and which is adapted to circulate the tank contents in a closed path for agitation, comminution and aeration thereof, and a liquid jet pump is inserted in the closed path to establish the necessary vacuum for the sewer system.
    Type: Grant
    Filed: April 22, 1976
    Date of Patent: July 12, 1977
    Assignee: IFO AB
    Inventors: Lars Wilhelm Pihl, Lars Bjarne Johansen, Carl Goran Herbert Carlsson, Karl Allan Bonde Mollerstedt