Patents Assigned to Ifo AB
  • Patent number: 4093551
    Abstract: A device for purifying water in small sewer systems (e.g. a system connected to one or a few family houses) includes means for automatic addition of a chemically active liquid to the water passing through the device. The invention eliminates the need of any movable parts by using two siphon tubes controlling the liquid supply. One of the siphon tubes is traversed by the sewer water and the corresponding flow generates a suction which is relied upon to transfer the chemically active liquid through the second siphon tube.
    Type: Grant
    Filed: November 29, 1976
    Date of Patent: June 6, 1978
    Assignee: IFO AB
    Inventors: Ulo Paabo, Erik Horskjar Albertsen
  • 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
  • Patent number: 4006497
    Abstract: An apparatus of an elastic material is intended to be placed along the upper edge of a closet pan for more effective distribution of the flushing liquid as it flows from the flushing liquid container to the pan. The apparatus has a longitudinal channel with a row of outlet openings which are directed towards the inner wall of the closet pan, and a slot along the row of openings which is normally closed because of the inherent elasticity of the material, but in which a tool may be inserted and pulled the length of the slot and row of openings for cleaning the channel and the openings.
    Type: Grant
    Filed: July 3, 1975
    Date of Patent: February 8, 1977
    Assignee: IFO AB
    Inventor: Karl Allan Bonde Mollerstedt
  • Patent number: 3996628
    Abstract: A water closet, in particular a water closet which is connected to a discharge vacuum conduit, comprises a container which is divided into a first and second compartment by means of a movable wall, the compartments being each connected by means of a conduit to either a source of water under pressure or the flushing device of the closet pan by the intermediary of a valve mechanism. On actuation of the valve mechanism the second compartment of the container is connected to the source of water under pressure, whereby the movable wall is shifted by the water flowing into the second compartment and forces the water present in the first compartment into the flushing device of the closet pan.
    Type: Grant
    Filed: July 3, 1975
    Date of Patent: December 14, 1976
    Assignee: IFO AB
    Inventor: Karl Allan Bonde Mollerstedt
  • Patent number: 3973594
    Abstract: A mixing valve for hot and cold water has two control levers for single hand operation each governing the position of a valve plug. The one lever controls the flow rate of the hot water and the other the flow rate of the cold water. The temperature of the mixed water is regulated by change of the relative positions of the levers and its flow rate is controlled by movement of the levers in unison. Such movement will leave the temperature unaffected because the levers actuate the plugs over cam means and the control surfaces between those means and the plugs yield a logarithmic relationship between the flow area at each plug and the corresponding lever movement.
    Type: Grant
    Filed: December 30, 1974
    Date of Patent: August 10, 1976
    Assignee: IFO AB
    Inventors: John Harry Gustafsson, Tord Egron Henry Froberg
  • Patent number: 3954378
    Abstract: This invention relates to a die casting machine with a rotating frame carrying several molds. These molds are arranged to advance consecutively by stepwise rotation to a common station where removal of the castings takes place. The machine is especially suited for casting objects of ceramic and similar materials, and for this reason the molds are enclosed in separable, bi-sectional flasks designed to facilitate removal of the castings.
    Type: Grant
    Filed: December 17, 1974
    Date of Patent: May 4, 1976
    Assignee: Ifo AB
    Inventor: Roland Johansson