Patents by Inventor Erik Dahlquist

Erik Dahlquist 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).

  • Patent number: 7213174
    Abstract: A method and an analyzer for producing information associated with a process is disclosed. Information from information sources that associate with the process is processed to classify the information into characteristic states. Results of the classification are then analyzed for producing information associated with at least one root cause for an event by means of at least one analyzing technology that is capable of reasoning under at least one uncertainty.
    Type: Grant
    Filed: June 5, 2002
    Date of Patent: May 1, 2007
    Assignee: ABB AB
    Inventors: Erik Dahlquist, Galia Weidl
  • Patent number: 7082348
    Abstract: A computer based method for controlling an industrial process that includes at least two unit processes, including the steps of directly controlling the process by a control model including one or more algorithms, and automatic diagnosis of the validity of the process data retrieved from the process for the purpose of preventing irrelevant process data from being used as an input in the control model.
    Type: Grant
    Filed: October 4, 2000
    Date of Patent: July 25, 2006
    Assignee: ABB AB
    Inventors: Erik Dahlquist, Thomas Liljenberg, Stefan Backa
  • Publication number: 20050049988
    Abstract: A method of providing data for root cause analysis. Data is transferred from a structured data model into a causally oriented data model. The causally oriented data model is complemented with information associated with conditional probabilities between at least two objects of the causally oriented data model.
    Type: Application
    Filed: May 14, 2004
    Publication date: March 3, 2005
    Inventors: Erik Dahlquist, Galia Weidl, Gerhard Vallmar, Raiko Milanovic
  • Publication number: 20040250166
    Abstract: A method and an analyser for producing information associated with a process is disclosed. In the method information from information sources that associate with the process is processed to classify said information into characteristic states. Results of said classification are then analysed for producing information associated with at least one root cause for an event by means of at least one analysing technology that is capable of reasoning under at least one uncertainty.
    Type: Application
    Filed: May 28, 2004
    Publication date: December 9, 2004
    Inventors: Erik Dahlquist, Galia Weidl
  • Patent number: 6597959
    Abstract: A method and a device for controlling a process (10), having at least two sub-processes (20, 30), by tracking, processing and correcting variables for the product, the production means and/or any process media throughout the process line. The process flow for the first sub-process (20) is divided into slices, each slice representing a specific volume of process flow. At least some of the measured and sampled variable values are related to its specific slice volume.
    Type: Grant
    Filed: April 25, 2000
    Date of Patent: July 22, 2003
    Assignee: ABB AB
    Inventors: Stefan Backa, Erik Dahlquist, Thomas Liljenberg
  • Patent number: 5019255
    Abstract: A device for separation of constituents, separable in a filter, from a liquid medium, comprising a stack of a plurality of plate units (10), arranged one after the other, with filters (11) arranged therein. Along the filters there are arranged rotors (24) for scraping off coatings deposited on the filters. Each rotor is mounted on a separate shaft piece (22) arranged in each plate. The shaft pieces are connected to each other by means of connections which can be drawn apart in the stacking direction of the plate units. Defects in the device can be detected in a channel (20) which extends in the stacking direction of the plate units and which is common to liquid having passed through the filter. A defective plate unit can be shut off, while maintaining the separation device in operation, and be replaced without dismantling the entire device (FIG. 7).
    Type: Grant
    Filed: November 10, 1988
    Date of Patent: May 28, 1991
    Assignee: ABB Atom AB
    Inventors: Erik Dahlquist, .ANG.ke Enekull
  • Patent number: 4904392
    Abstract: From a liquid mixture containing a liquid in a continuous phase and a liquid in the form of drops in a phase dispersed therein, the liquid in the dispersed phase is separated from the liquid in the continuous phase by passing the liquid mixture through a liquid-permeable layer (11, 12), arranged in chamber (10), with through-holes of which at least the majority has a cross section area which is greater than the cross section area of at least the main part of the drops in the dispersed phase, the liquid mixture being sheared, by means of a rotor (23) arranged in the chamber on the inlet side of the liquid-permeable layer, over the layer while maintaining a film (24) of liquid, movable along the layer, from the dispersed phase on the layer and while maintaining a higher pressure on the inlet side of the layer than on its outlet side. Drops of dispersed liquid then coalesce in the film and in the through-holes of the layer and can thus be separated from the liquid in the continuous phase.
    Type: Grant
    Filed: April 5, 1989
    Date of Patent: February 27, 1990
    Assignee: ABB Atom AB
    Inventor: Erik Dahlquist
  • Patent number: 4740312
    Abstract: A separation means for a liquid medium containing undissolved constituents comprises a chamber (10) with dynamic membrane (11, 12) arranged therein, said membrane consisting of a porous support matrix (11a, 12a) or other support matrix with through holes, and a layer (11b, 12b) of a small-sized particle material generated thereon in the chamber. In such a separation means the flow of the liquid medium is split into two streams, one constituting the permeate stream which penetrates through the membrane and the other constituting the reject stream which flows past the membrane.
    Type: Grant
    Filed: January 16, 1987
    Date of Patent: April 26, 1988
    Assignee: AB Asea-Atom
    Inventors: Erik Dahlquist, Sune Flink, Soren Stridsberg, Milan Teppler, Bertil Akerblom