Patents by Inventor Bernd Boehnke

Bernd Boehnke 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).

  • Publication number: 20200330903
    Abstract: A method of operating a filter press, wherein filter material is fed into a filter chamber so as to form a filter cake between at least two sides of a flexible said filter medium. Filtrate is received from the filter chamber and the filter cake formed the filter chamber is discharged. Prior to discharging the filter cake, compression is applied on the filter cake formed within the filter chamber by providing compression fluid gas at a compression pressure exceeding a prevailing pressure within the filter chamber, directly on a side of the filter medium exterior to the filter chamber, so as to exert said compression pressure directly on said side of the filter medium, thereby causing the filter medium to yield against the filter cake.
    Type: Application
    Filed: June 30, 2020
    Publication date: October 22, 2020
    Inventor: Bernd BÖHNKE
  • Patent number: 10780375
    Abstract: A liquid filtration apparatus includes a series of upright filter plates forming a filter plate pack. Filtering spaces are formed in the filter plate pack. The liquid filtration apparatus includes at least one filtering space and a filter chamber that is at least partly limited laterally by a filter media. The at least one filtering space has an elongated bottom discharge opening at a level below the filter chamber. The elongated bottom discharge opening is provided with a first openable and closable hatch arrangement and with a second openable and closable hatch arrangement extending across the elongated bottom discharge opening.
    Type: Grant
    Filed: February 18, 2020
    Date of Patent: September 22, 2020
    Assignee: OUTOTEC (FINLAND) OY
    Inventors: Bernd Böhnke, Kari Vänttinen, Saku Eronen
  • Patent number: 10773189
    Abstract: A liquid filtration apparatus includes a series of upright filter plates forming a filter plate pack. Filtering spaces are formed in the filter plate pack. The liquid filtration apparatus includes at least one filtering space and a filter chamber that is at least partly limited laterally by a filter media. The filtering spaces have an elongate bottom discharge opening limited by two first opposite side walls and provided with a first inflatable and deflatable hose seal extending across the elongate bottom discharge opening and configured to selectively open and close the elongate bottom discharge opening at the first inflatable and deflatable hose seal. The first inflatable and deflatable hose seal are in the elongate bottom discharge opening fastened at one of the first opposite side walls of the elongate bottom discharge opening.
    Type: Grant
    Filed: February 18, 2020
    Date of Patent: September 15, 2020
    Assignee: OUTOTEC (FINLAND) OY
    Inventors: Bernd Böhnke, Kari Vänttinen, Saku Eronen
  • Patent number: 10737200
    Abstract: A method of operating a filter press, wherein filter material is fed into a filter chamber so as to form a filter cake between at least two sides of a flexible said filter medium. Filtrate is received from the filter chamber and the filter cake formed the filter chamber is discharged. Prior to discharging the filter cake, compression is applied on the filter cake formed within the filter chamber by providing compression fluid gas at a compression pressure exceeding a prevailing pressure within the filter chamber, directly on a side of the filter medium exterior to the filter chamber, so as to exert said compression pressure directly on said side of the filter medium, thereby causing the filter medium to yield against the filter cake.
    Type: Grant
    Filed: February 18, 2020
    Date of Patent: August 11, 2020
    Assignee: OUTOTEC (FINLAND) OY
    Inventor: Bernd Böhnke
  • Publication number: 20200188818
    Abstract: A liquid filtration apparatus includes a series of upright filter plates forming a filter plate pack. Filtering spaces are formed in the filter plate pack. The liquid filtration apparatus includes at least one filtering space and a filter chamber that is at least partly limited laterally by a filter media. The filtering spaces have an elongate bottom discharge opening limited by two first opposite side walls and provided with a first inflatable and deflatable hose seal extending across the elongate bottom discharge opening and configured to selectively open and close the elongate bottom discharge opening at the first inflatable and deflatable hose seal. The first inflatable and deflatable hose seal are in the elongate bottom discharge opening fastened at one of the first opposite side walls of the elongate bottom discharge opening.
    Type: Application
    Filed: February 18, 2020
    Publication date: June 18, 2020
    Inventors: Bernd Böhnke, Kari Vänttinen, Saku Eronen
  • Publication number: 20200179831
    Abstract: A liquid filtration apparatus includes a series of upright filter plates forming a filter plate pack. Filtering spaces are formed in the filter plate pack. The liquid filtration apparatus includes at least one filtering space and a filter chamber that is at least partly limited laterally by a filter media. The at least one filtering space has an elongated bottom discharge opening at a level below the filter chamber. The elongated bottom discharge opening is provided with a first openable and closable hatch arrangement and with a second openable and closable hatch arrangement extending across the elongated bottom discharge opening.
    Type: Application
    Filed: February 18, 2020
    Publication date: June 11, 2020
    Inventors: Bernd BÖHNKE, Kari VÄNTTINEN, Saku ERONEN
  • Patent number: 10391426
    Abstract: A recess plate designed for use in a filter device for filtering a suspension includes a stationary head piece and a movable end piece, and a pack including copies of the recess plate, having a filter chamber inside the pack, adjoining the recess plate, having a first pipe for filling the suspension into the filter chamber, having a filter cloth for collecting a solid content out of the suspension, and having a second pipe for discharging a liquid fraction of the suspension out of the filter chamber as a filtrate, wherein the filter device may be closed before filtering by forcing the end piece in direction of the head piece, and opened after filtering by releasing the end piece, and moving the end piece away from the head piece for removing the filter cake from the filter cloth.
    Type: Grant
    Filed: June 16, 2017
    Date of Patent: August 27, 2019
    Assignee: OUTOTEC (FINLAND) OY
    Inventor: Bernd Böhnke
  • Patent number: 10022674
    Abstract: A filter device including a stationary head piece and a movable end piece and a pack of adjacent elements including a recess plate, wherein the pack is arranged between the stationary head piece and the movable end piece, wherein the recess plate includes a base element including a recess forming a filter chamber between the adjacent elements, wherein the filter device includes a filter membrane between the adjacent elements, wherein the filter membrane retains a solid content of a suspension as a filter cake and allows a remaining liquid fraction of the suspension to pass as a filtrate, wherein the recess plate includes a fluid pipe discharging the filtrate, which fluid pipe runs along a narrow edge of the base element, wherein the recess plate includes a fluid duct that connects the fluid pipe to the filter chamber.
    Type: Grant
    Filed: September 19, 2014
    Date of Patent: July 17, 2018
    Assignee: OUTOTEC (FINLAND) OY
    Inventor: Bernd Boehnke
  • Patent number: 9968871
    Abstract: The invention relates to a filter device for filtering a suspension, and the method of operation thereof, wherein between a stationary head piece and a movable end piece, the filter device has a pack of a recess plate and an adjacent recess plate, the filter device has a suspension pipe for piping for piping a first stream of the suspension from the head piece into the pack, wherein connecting to the end piece, and a supply pipe for piping a second stream of the suspension into the suspension pipe, forming a filter chamber, the recess plate and/or the adjacent recess plate has a recess, from the suspension pipe, the recess plate has a suspension duct for piping the suspension into the filter chamber, and wherein between the recess plate and the adjacent recess plate, the filter device has at least one filter cloth for filtering a solid content out of the suspension.
    Type: Grant
    Filed: April 19, 2012
    Date of Patent: May 15, 2018
    Assignee: OUTOTEC (FINLAND) OY
    Inventor: Bernd Böhnke
  • Publication number: 20170282098
    Abstract: A recess plate designed for use in a filter device for filtering a suspension includes a stationary head piece and a movable end piece, and a pack including copies of the recess plate, having a filter chamber inside the pack, adjoining the recess plate, having a first pipe for filling the suspension into the filter chamber, having a filter cloth for collecting a solid content out of the suspension, and having a second pipe for discharging a liquid fraction of the suspension out of the filter chamber as a filtrate, wherein the filter device may be closed before filtering by forcing the end piece in direction of the head piece, and opened after filtering by releasing the end piece, and moving the end piece away from the head piece for removing the filter cake from the filter cloth.
    Type: Application
    Filed: June 16, 2017
    Publication date: October 5, 2017
    Inventor: Bernd BÖHNKE
  • Patent number: 9776109
    Abstract: The invention relates to a method for filtering a suspension in a filter device comprising a sequence of steps, including piping the suspension into the filter chamber between the filter cloths, directing the suspension through the filter cloths, discharging a liquid fraction of the suspension through the first duct and the second duct out of the filter chamber and through the first outlet of the first recess plate and the second outlet of the second recess plate as a filtrate, and piping a drying gas from the head piece into the filter chamber through the first duct and discharging the same through the second duct. The invention further relates to such a recess plate that is designed for packing a plurality of specimens of the recess plate into a pack between a stationary head piece and a moveable end piece of a filter device.
    Type: Grant
    Filed: April 19, 2012
    Date of Patent: October 3, 2017
    Assignee: OUTOTEC (FINLAND) OY
    Inventor: Bernd Böhnke
  • Patent number: 9649580
    Abstract: The invention suggests a filter device having a stationary head piece and a movable end piece, a pack of at least a recess plate and an adjacent recess plate between the head piece and the end piece, the recess plate and/or the adjacent recess plate having a recess, that forms a filter chamber between the recess plate and the adjacent recess plate, a first filter cloth and a second filter cloth between the recess plate and the adjacent recess plate for retaining as a filter cake a solid content of a suspension, and allowing a remaining liquid fraction of the suspension to pass as a filtrate, and a suspension pipe running through the pack between the head piece and the end piece for charging the suspension through the filling shoe between the first filter cloth and the second filter cloth into the filter chamber, and a filling shoe comprising an outlet section for the suspension, clamping the first filter cloth to the recess plate during filtering operation of the filter device, an anchoring section for anchor
    Type: Grant
    Filed: October 12, 2012
    Date of Patent: May 16, 2017
    Assignee: Outotec (Finland) Oy
    Inventor: Bernd Böhnke
  • Publication number: 20150265947
    Abstract: The invention suggests a filter device having a stationary head piece and a movable end piece, a pack of at least a recess plate and an adjacent recess plate between the head piece and the end piece, the recess plate and/or the adjacent recess plate having a recess, that forms a filter chamber between the recess plate and the adjacent recess plate, a first filter cloth and a second filter cloth between the recess plate and the adjacent recess plate for retaining as a filter cake a solid content of a suspension, and allowing a remaining liquid fraction of the suspension to pass as a filtrate, and a suspension pipe running through the pack between the head piece and the end piece for charging the suspension through the filling shoe between the first filter cloth and the second filter cloth into the filter chamber, and a filling shoe comprising an outlet section for the suspension, clamping the first filter cloth to the recess plate during filtering operation of the filter device, an anchoring section for anchor
    Type: Application
    Filed: October 12, 2012
    Publication date: September 24, 2015
    Applicant: OUTOTEC (FINLAND) OY
    Inventor: Bernd Böhnke
  • Publication number: 20150114914
    Abstract: The invention relates to a method for filtering a suspension in a filter device comprising a sequence of steps, including piping the suspension into the filter chamber between the filter cloths, directing the suspension through the filter cloths, discharging a liquid fraction of the suspension through the first duct and the second duct out of the filter chamber and through the first outlet of the first recess plate and the second outlet of the second recess plate as a filtrate, and piping a drying gas from the head piece into the filter chamber through the first duct and discharging the same through the second duct. The invention further relates to such a recess plate that is designed for packing a plurality of specimens of the recess plate into a pack between a stationary head piece and a moveable end piece of a filter device.
    Type: Application
    Filed: April 19, 2012
    Publication date: April 30, 2015
    Applicant: OUTOTEC (FINLAND) OY
    Inventor: Bernd Böhnke
  • Publication number: 20150108072
    Abstract: The invention relates to a method for sealing a filter chamber of a filter device, comprising a sequence of steps, including moving the recess plate close to the adjacent recess plate for building the pack, and securing the recess plate to the adjacent recess plate, piping a suspension into the filter chamber on a cake side of a filter cloth, letting a solid content of the suspension settle on the filter cloth as a filter cake, and a liquid fraction of the suspension permeate the filter cloth to a filtrate side thereof, and discharging the filtrate out of the filter chamber. The invention further relates to a recess plate for use in a filter device, the recess plate comprising a recess, and a groove encircling the recess, the groove being adapted to receive a sealing ring for sealing a filter chamber.
    Type: Application
    Filed: April 19, 2012
    Publication date: April 23, 2015
    Applicant: OUTOTEC (FINLAND) OY
    Inventor: Bernd Böhnke
  • Publication number: 20150068986
    Abstract: The invention relates to a filter device for filtering a suspension, and the method of operation thereof, wherein between a stationary head piece and a movable end piece, the filter device has a pack of a recess plate and an adjacent recess plate, the filter device has a suspension pipe for piping a first stream of the suspension from the head piece into the pack, wherein connecting to the end piece, and a supply pipe for piping a second stream of the suspension into the suspension pipe, forming a filter chamber, the recess plate and/or the adjacent recess plate has a recess, from the suspension pipe, the recess plate has a suspension duct for piping the suspension into the filter chamber, and wherein between the recess plate and the adjacent recess plate, the filter device has at least one filter cloth for filtering a solid content out of the suspension.
    Type: Application
    Filed: April 19, 2012
    Publication date: March 12, 2015
    Applicant: OUTOTEC (FINLAND) OY
    Inventor: Bernd Böhnke
  • Publication number: 20150060347
    Abstract: A filter device including a stationary head piece and a movable end piece and a pack of adjacent elements including a recess plate, wherein the pack is arranged between the stationary head piece and the movable end piece, wherein the recess plate includes a base element including a recess forming a filter chamber between the adjacent elements, wherein the filter device includes a filter membrane between the adjacent elements, wherein the filter membrane retains a solid content of a suspension as a filter cake and allows a remaining liquid fraction of the suspension to pass as a filtrate, wherein the recess plate includes a fluid pipe discharging the filtrate, which fluid pipe runs along a narrow edge of the base element, wherein the recess plate includes a fluid duct that connects the fluid pipe to the filter chamber.
    Type: Application
    Filed: September 19, 2014
    Publication date: March 5, 2015
    Inventor: Bernd Boehnke
  • Publication number: 20040011719
    Abstract: A filter press (1) for filtering suspensions is provided with a package of plate-like filter elements (5) which in a filtration position can be pressed sealingly against one another in a parallel arrangement. Thereby the filter elements (5) enclose in pairs a filter chamber which is delimited at least on one side by a planar filter medium. Furthermore, the filter elements (5) are movable to a discharging position in which adjacent filter elements (5) have a distance from one another which allows the removal of the filter cake from the filter chamber. In order to reduce the overall height of such a filter press (1) or to increase the filter surface area with unchanged overall height, it is proposed that the filter elements (5) are alternatingly inclined towards one another in the opposite direction in the discharging position, so that the distance between adjacent filter elements (5) increases in the discharging direction of the filter cake.
    Type: Application
    Filed: May 28, 2003
    Publication date: January 22, 2004
    Inventor: Bernd Boehnke