Patents by Inventor Johan Backlund
Johan Backlund 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).
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Patent number: 11806800Abstract: A standard reference plate is configured for insertion into an additive manufacturing apparatus for calibrating an electron beam of the additive manufacturing apparatus. The standard reference plate includes a lower plate and an upper plate being essentially in parallel and attached spaced apart from each other, the upper plate including a plurality of holes. A predetermined hollow pattern is provided inside the holes, and a spacing between the holes and the size of the holes and a distance between the upper plate and the lower plate and a position of an x-ray sensor of the additive manufacturing apparatus with respect to the standard reference plate are arranged so that x-rays emanating from the lower plate, when the electron beam is passing through a hollow part of the hollow pattern, will not pass directly from the lower plate through any one of the holes to the x-ray sensor.Type: GrantFiled: September 11, 2020Date of Patent: November 7, 2023Assignee: Arcam ABInventors: Johan Backlund, Martin Wildheim
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Patent number: 11517975Abstract: An electron beam source including a cathode, an anode, a means for deflecting an electron beam over a target surface and at least one vacuum pump, the electron beam source further including a contraction area arranged between the anode and the means for deflecting the electron beam where a hole in the contraction area is aligned with a hole in the anode with respect to the cathode, a first vacuum pump is arranged between the contraction area and the anode and a second vacuum pump is arranged above the anode, a gas inlet is provided between the contraction area and the means for deflecting the electron beam, wherein a first crossover of the electron beam is arranged between the cathode and the anode and a second crossover is arranged at or in close proximity to the contraction area.Type: GrantFiled: November 20, 2018Date of Patent: December 6, 2022Assignee: Arcam ABInventors: Mattias Fager, Johan Backlund
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Publication number: 20210402479Abstract: A method for controlling an energy beam in an additive manufacturing machine when forming a three-dimensional article layer by layer by successive fusion of selected areas of powder layers, which selected areas correspond to successive layers of the article. The method includes steps of radiating a powder layer by the energy beam and creating a set of images of the powder layer for a set of positions on the powder layer by detecting particles emitted, backscattered or reflected from the powder layer when being radiated, comparing data representing the set of images and reference data with each other for identifying a difference between the energy beam when used on the powder layer and the reference data, with respect to at least one energy beam parameter, and adjusting the energy beam based on such an identified difference between the energy beam when used on the powder layer and the reference data.Type: ApplicationFiled: February 28, 2019Publication date: December 30, 2021Applicant: Arcam ABInventor: Johan Backlund
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Patent number: 11208295Abstract: An arrangement of counting passengers in an elevator using two separate counting mechanisms is disclosed. The elevator car typically has a curtain of light arranged to the door and a load weighing device arranged to measure the weight of the elevator car. From the information recorded by the curtain of light and the load weighing device, it is possible to count the number of passengers. The reliability of the counting results can be improved by processing the counting results for forming a combined counting result that provides a more reliable counting result when the independent counts deviate from each other.Type: GrantFiled: January 17, 2019Date of Patent: December 28, 2021Assignee: KONE CORPORATIONInventors: Marja-Liisa Siikonen, Johan Backlund, Janne Sorsa, Juha-Matti Kuusinen
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Patent number: 11155437Abstract: A solution for estimating the number of persons entering or leaving an elevator car, wherein a stepwise change in passenger load is detected based on a passenger load signal relating to the elevator car, and the change in a passenger count is estimated based on passenger load change ranges depending on traffic intensity and the stepwise change in the passenger load.Type: GrantFiled: March 20, 2019Date of Patent: October 26, 2021Assignee: KONE CORPORATIONInventor: Johan Backlund
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Patent number: 11084098Abstract: Various embodiments of the present invention relate to a method for welding a workpiece comprising the steps of: making a first weld at a first position on said workpiece with a high energy beam, deflecting the high energy beam with at least one deflection lens for making a second weld at a second position on said workpiece, focusing the high energy beam on said workpiece with at least one focusing lens, shaping the high energy beam on said workpiece with at least one astigmatism lens so that the shape of the high energy beam on said workpiece is longer in a direction parallel to a deflection direction of said high energy beam than in a direction perpendicular to said deflection direction of said high energy beam. The invention is also related to the use of an astigmatism lens and to a method for forming a three dimensional article.Type: GrantFiled: August 1, 2018Date of Patent: August 10, 2021Assignee: Arcam ABInventors: Johan Backlund, Tomas Lock
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Publication number: 20200406389Abstract: A standard reference plate is configured for insertion into an additive manufacturing apparatus for calibrating an electron beam of the additive manufacturing apparatus. The standard reference plate includes a lower plate and an upper plate being essentially in parallel and attached spaced apart from each other, the upper plate including a plurality of holes. A predetermined hollow pattern is provided inside the holes, and a spacing between the holes and the size of the holes and a distance between the upper plate and the lower plate and a position of an x-ray sensor of the additive manufacturing apparatus with respect to the standard reference plate are arranged so that x-rays emanating from the lower plate, when the electron beam is passing through a hollow part of the hollow pattern, will not pass directly from the lower plate through any one of the holes to the x-ray sensor.Type: ApplicationFiled: September 11, 2020Publication date: December 31, 2020Applicant: Arcam ABInventors: Johan Backlund, Martin Wildheim
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Patent number: 10821517Abstract: Provided is an apparatus that includes a high energy beam configured to make a first weld at a first position on a workpiece; at least one deflection lens configured to deflect the high energy beam so as to cause the high energy beam to make a second weld at a second position; at least one focusing lens configured to focus the high energy beam; at least one astigmatism lens; and at least one controller. The controller is configured to shape the high energy beam so that the shape of the high energy beam on the workpiece is longer in a direction parallel to a deflection direction of the high energy beam than in a direction perpendicular to the deflection direction of the high energy beam. A length ratio is varying as a function of the power of the energy beam, while the width in the perpendicular direction is constant.Type: GrantFiled: July 20, 2018Date of Patent: November 3, 2020Assignee: Arcam ABInventors: Johan Backlund, Tomas Lock
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Patent number: 10807187Abstract: An X-ray standard reference object for calibrating a scanning electron beam in an additive manufacturing apparatus by measuring X-ray signals generated by scanning the electron beam onto the reference object, the reference object comprises: a lower and an upper plate being essentially in parallel and attached spaced apart from each other, the upper plate comprises a plurality of holes, wherein a predetermined hollow pattern is provided inside the holes.Type: GrantFiled: August 24, 2016Date of Patent: October 20, 2020Assignee: Arcam ABInventors: Johan Backlund, Martin Wildheim
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Publication number: 20190218059Abstract: A solution for estimating the number of persons entering or leaving an elevator car, wherein a stepwise change in passenger load is detected based on a passenger load signal relating to the elevator car, and the change in a passenger count is estimated based on passenger load change ranges depending on traffic intensity and the stepwise change in the passenger load.Type: ApplicationFiled: March 20, 2019Publication date: July 18, 2019Applicant: KONE CorporationInventor: Johan BACKLUND
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Publication number: 20190193192Abstract: An electron beam source comprising a cathode, an anode, a means for deflecting an electron beam over a target surface and at least one vacuum pump, the electron beam source further comprising a contraction area arranged between the anode and the means for deflecting the electron beam where a hole in the contraction area is aligned with a hole in the anode with respect to the cathode, a first vacuum pump is arranged between the contraction area and the anode and a second vacuum pump is arranged above the anode, a gas inlet is provided between the contraction area and the means for deflecting the electron beam, wherein a first crossover of the electron beam is arranged between the cathode and the anode and a second crossover is arranged at or in close proximity to the contraction area.Type: ApplicationFiled: November 20, 2018Publication date: June 27, 2019Inventors: Mattias Fager, Johan Backlund
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Publication number: 20190152740Abstract: An arrangement of counting passengers in an elevator using two separate counting mechanisms is disclosed. The elevator car typically has a curtain of light arranged to the door and a load weighing device arranged to measure the weight of the elevator car. From the information recorded by the curtain of light and the load weighing device, it is possible to count the number of passengers. The reliability of the counting results can be improved by processing the counting results for forming a combined counting result that provides a more reliable counting result when the independent counts deviate from each other.Type: ApplicationFiled: January 17, 2019Publication date: May 23, 2019Applicant: KONE CorporationInventors: Marja-Liisa SIIKONEN, Johan BACKLUND, Janne SORSA, Juha-Matti KUUSINEN
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Publication number: 20180369916Abstract: Various embodiments of the present invention relate to a method for welding a workpiece comprising the steps of: making a first weld at a first position on said workpiece with a high energy beam, deflecting the high energy beam with at least one deflection lens for making a second weld at a second position on said workpiece, focusing the high energy beam on said workpiece with at least one focusing lens, shaping the high energy beam on said workpiece with at least one astigmatism lens so that the shape of the high energy beam on said workpiece is longer in a direction parallel to a deflection direction of said high energy beam than in a direction perpendicular to said deflection direction of said high energy beam. The invention is also related to the use of an astigmatism lens and to a method for forming a three dimensional article.Type: ApplicationFiled: August 1, 2018Publication date: December 27, 2018Inventors: Johan Backlund, Tomas Lock
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Publication number: 20180345377Abstract: Provided is an apparatus that includes a high energy beam configured to make a first weld at a first position on a workpiece; at least one deflection lens configured to deflect the high energy beam so as to cause the high energy beam to make a second weld at a second position; at least one focusing lens configured to focus the high energy beam; at least one astigmatism lens; and at least one controller. The controller is configured to shape the high energy beam so that the shape of the high energy beam on the workpiece is longer in a direction parallel to a deflection direction of the high energy beam than in a direction perpendicular to the deflection direction of the high energy beam. A length ratio is varying as a function of the power of the energy beam, while the width in the perpendicular direction is constant.Type: ApplicationFiled: July 20, 2018Publication date: December 6, 2018Inventors: Johan Backlund, Tomas Lock
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Patent number: 10071423Abstract: Various embodiments of the present invention relate to a method for welding a workpiece comprising the steps of: making a first weld at a first position on said workpiece with a high energy beam, deflecting the high energy beam with at least one deflection lens for making a second weld at a second position on said workpiece, focusing the high energy beam on said workpiece with at least one focusing lens, shaping the high energy beam on said workpiece with at least one astigmatism lens so that the shape of the high energy beam on said workpiece is longer in a direction parallel to a deflection direction of said high energy beam than in a direction perpendicular to said deflection direction of said high energy beam. The invention is also related to the use of an astigmatism lens and to a method for forming a three dimensional article.Type: GrantFiled: March 14, 2018Date of Patent: September 11, 2018Assignee: Arcam ABInventors: Johan Backlund, Tomas Lock
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Patent number: 10058921Abstract: Various embodiments of the present invention relate to a method for welding a workpiece comprising the steps of: making a first weld at a first position on said workpiece with a high energy beam, deflecting the high energy beam with at least one deflection lens for making a second weld at a second position on said workpiece, focusing the high energy beam on said workpiece with at least one focusing lens, shaping the high energy beam on said workpiece with at least one astigmatism lens so that the shape of the high energy beam on said workpiece is longer in a direction parallel to a deflection direction of said high energy beam than in a direction perpendicular to said deflection direction of said high energy beam. The invention is also related to the use of an astigmatism lens and to a method for forming a three dimensional article.Type: GrantFiled: March 14, 2018Date of Patent: August 28, 2018Assignee: Arcam ABInventors: Johan Backlund, Tomas Lock
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Publication number: 20180200796Abstract: Various embodiments of the present invention relate to a method for welding a workpiece comprising the steps of: making a first weld at a first position on said workpiece with a high energy beam, deflecting the high energy beam with at least one deflection lens for making a second weld at a second position on said workpiece, focusing the high energy beam on said workpiece with at least one focusing lens, shaping the high energy beam on said workpiece with at least one astigmatism lens so that the shape of the high energy beam on said workpiece is longer in a direction parallel to a deflection direction of said high energy beam than in a direction perpendicular to said deflection direction of said high energy beam. The invention is also related to the use of an astigmatism lens and to a method for forming a three dimensional article.Type: ApplicationFiled: March 14, 2018Publication date: July 19, 2018Inventors: Johan Backlund, Tomas Lock
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Publication number: 20180200797Abstract: Various embodiments of the present invention relate to a method for welding a workpiece comprising the steps of: making a first weld at a first position on said workpiece with a high energy beam, deflecting the high energy beam with at least one deflection lens for making a second weld at a second position on said workpiece, focusing the high energy beam on said workpiece with at least one focusing lens, shaping the high energy beam on said workpiece with at least one astigmatism lens so that the shape of the high energy beam on said workpiece is longer in a direction parallel to a deflection direction of said high energy beam than in a direction perpendicular to said deflection direction of said high energy beam. The invention is also related to the use of an astigmatism lens and to a method for forming a three dimensional article.Type: ApplicationFiled: March 14, 2018Publication date: July 19, 2018Inventors: Johan Backlund, Tomas Lock
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Patent number: 9950367Abstract: Various embodiments of the present invention relate to a method for welding a workpiece comprising the steps of: making a first weld at a first position on said workpiece with a high energy beam, deflecting the high energy beam with at least one deflection lens for making a second weld at a second position on said workpiece, focusing the high energy beam on said workpiece with at least one focusing lens, shaping the high energy beam on said workpiece with at least one astigmatism lens so that the shape of the high energy beam on said workpiece is longer in a direction parallel to a deflection direction of said high energy beam than in a direction perpendicular to said deflection direction of said high energy beam. The invention is also related to the use of an astigmatism lens and to a method for forming a three dimensional article.Type: GrantFiled: March 22, 2017Date of Patent: April 24, 2018Assignee: ARCAM ABInventors: Johan Backlund, Tomas Lock
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Publication number: 20170189964Abstract: Various embodiments of the present invention relate to a method for welding a workpiece comprising the steps of: making a first weld at a first position on said workpiece with a high energy beam, deflecting the high energy beam with at least one deflection lens for making a second weld at a second position on said workpiece, focusing the high energy beam on said workpiece with at least one focusing lens, shaping the high energy beam on said workpiece with at least one astigmatism lens so that the shape of the high energy beam on said workpiece is longer in a direction parallel to a deflection direction of said high energy beam than in a direction perpendicular to said deflection direction of said high energy beam. The invention is also related to the use of an astigmatism lens and to a method for forming a three dimensional article.Type: ApplicationFiled: March 22, 2017Publication date: July 6, 2017Inventors: Johan Backlund, Tomas Lock