Patents by Inventor Kornel Ehmann
Kornel Ehmann 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: 11919106Abstract: A system for making a build using directed energy deposition is provided. The system includes a primary heat source; a processing nozzle movable relative to the build for delivering a metal powder, a carrier gas for the metal powder, and a shield gas to the build; a melt pool sensor for providing information regarding a temperature of a melt pool of the build; a secondary heat source separate from the primary heat source positionable relative to the build for delivering heat to a selected area of the build; a cooling source positionable relative to the build for delivering a cooling fluid to a selected area of the build; and a control system for operating the primary heat source, the secondary heat source and the cooling source to maintain a desired temperature profile for the build. The system preferably includes a temperature sensor for providing a temperature profile of the build.Type: GrantFiled: December 18, 2018Date of Patent: March 5, 2024Assignee: Northwestern UniversityInventors: Jennifer Lynn Bennett, Kornel Ehmann, Jian Cao
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Patent number: 11607719Abstract: Flanges formed on sheet metal parts to increase the part stiffness or create mating surface for further assembly are created in an incremental sheet forming process using forming tool and supporting tool that move along a specified tool path so as to gradually deform a peripherally-clamped sheet metal work piece into the desired geometry. With two universal tools moving along the designed toolpath on the both sides of the part, the process is very flexible. Process time is can also be reduced by utilizing an accumulative double-sided incremental hole-flanging strategy, in which the flange is formed in only one step.Type: GrantFiled: March 11, 2022Date of Patent: March 21, 2023Assignees: Northwestern University, SHANGHAI JIAO TONG UNIVERSITYInventors: Huan Zhang, Jian Cao, Kornel Ehmann, Jun Chen
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Publication number: 20220266326Abstract: Flanges formed on sheet metal parts to increase the part stiffness or create mating surface for further assembly are created in an incremental sheet forming process using forming tool and supporting tool that move along a specified tool path so as to gradually deform a peripherally-clamped sheet metal work piece into the desired geometry. With two universal tools moving along the designed toolpath on the both sides of the part, the process is very flexible. Process time is can also be reduced by utilizing an accumulative double-sided incremental hole-flanging strategy, in which the flange is formed in only one step.Type: ApplicationFiled: March 11, 2022Publication date: August 25, 2022Inventors: Huan Zhang, Jian Cao, Kornel Ehmann, Jun Chen
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Patent number: 11338348Abstract: Flanges formed on sheet metal parts to increase the part stiffness or create mating surface for further assembly are created in an incremental sheet forming process using forming tool and supporting tool that move along a specified tool path so as to gradually deform a peripherally-clamped sheet metal work piece into the desired geometry. With two universal tools moving along the designed toolpath on the both sides of the part, the process is very flexible. Process time is can also be reduced by utilizing an accumulative double-sided incremental hole-flanging strategy, in which the flange is formed in only one step.Type: GrantFiled: May 14, 2018Date of Patent: May 24, 2022Assignees: NORTHWESTERN UNIVERSITY, SHANGHAI JIAO TONG UNIVERSITYInventors: Huan Zhang, Jian Cao, Kornel Ehmann, Jun Chen
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Patent number: 11077477Abstract: A rolling mill system for Incremental rotary shaping of an elongated workpiece is provided that includes first and second workpiece holders. A support frame has a track with the first and second workpiece holders being movably associated with the track, the workpiece holders and an associated workpiece being movable in unison along the track. A radial chuck is mounted to the frame that includes a plurality of jaws that are movable radially inwardly and outwardly. Each jaw has a tool mounted thereto that is rotatable about an axis of rotation, with the axis of rotation of each tool being oriented at a skew angle relative to the longitudinal axis of a workpiece. A source of electric current and an electrically conductive flow path are provided for flowing electrical current through a workpiece. A controller is provided that is configured to control the operation of each of the first motor, second motor and third motor, and to control the flow of current flowing through the tools to the workpiece.Type: GrantFiled: October 6, 2017Date of Patent: August 3, 2021Assignee: Northwestern UniversityInventors: Qiang Zeng, Kornel Ehmann, Man Kwan Ng, Jian Cao
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Patent number: 10692700Abstract: A system for laser-induced plasma micromachining of a work-piece includes a dielectric fluid, a dielectric fluid supply device, a laser, a processor, and a memory. The dielectric fluid supply device is arranged to hold a work-piece in the dielectric fluid or to direct the dielectric fluid onto the work-piece. The laser is arranged to emit a pulsed laser-beam. The processor is in electronic communication with the laser. The memory is in electronic communication with the processor. The memory includes programming code for execution by the processor. The programming code is programmed to direct the laser to deliver the pulsed laser-beam into the dielectric fluid to create a plasma generated at a focal point of the pulsed laser-beam in the dielectric fluid to micromachine, using the plasma, the work-piece disposed adjacent to the focal point.Type: GrantFiled: August 23, 2016Date of Patent: June 23, 2020Assignee: Northwestern UniversityInventors: Kumar Pallav, Rajiv Malhotra, Ishan Saxena, Kornel Ehmann, Jian Cao
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Publication number: 20200188974Abstract: A rolling mill system for Incremental rotary shaping of an elongated workpiece is provided that includes first and second workpiece holders. A support frame has a track with the first and second workpiece holders being movably associated with the track, the workpiece holders and an associated workpiece being movable in unison along the track. A radial chuck is mounted to the frame that includes a plurality of jaws that are movable radially inwardly and outwardly. Each jaw has a tool mounted thereto that is rotatable about an axis of rotation, with the axis of rotation of each tool being oriented at a skew angle relative to the longitudinal axis of a workpiece. A source of electric current and an electrically conductive flow path are provided for flowing electrical current through a workpiece. A controller is provided that is configured to control the operation of each of the first motor, second motor and third motor, and to control the flow of current flowing through the tools to the workpiece.Type: ApplicationFiled: October 6, 2017Publication date: June 18, 2020Applicant: Northwestern UniversityInventors: Qiang Zeng, Kornel Ehmann, Man Kwan Ng, Jian Cao
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Publication number: 20200070235Abstract: Flanges formed on sheet metal parts to increase the part stiffness or create mating surface for further assembly are created in an incremental sheet forming process using forming tool and supporting tool that move along a specified tool path so as to gradually deform a peripherally-clamped sheet metal work piece into the desired geometry. With two universal tools moving along the designed toolpath on the both sides of the part, the process is very flexible. Process time is can also be reduced by utilizing an accumulative double-sided incremental hole-flanging strategy, in which the flange is formed in only one step.Type: ApplicationFiled: May 14, 2018Publication date: March 5, 2020Applicants: Northwestern University, Shanghai Jiao Tong UniversityInventors: Huan Zhang, Jian Cao, Kornel Ehmann, Jun Chen
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Publication number: 20190184494Abstract: A system for making a build using directed energy deposition is provided. The system includes a primary heat source; a processing nozzle movable relative to the build for delivering a metal powder, a carrier gas for the metal powder, and a shield gas to the build; a melt pool sensor for providing information regarding a temperature of a melt pool of the build; a secondary heat source separate from the primary heat source positionable relative to the build for delivering heat to a selected area of the build; a cooling source positionable relative to the build for delivering a cooling fluid to a selected area of the build; and a control system for operating the primary heat source, the secondary heat source and the cooling source to maintain a desired temperature profile for the build. The system preferably includes a temperature sensor for providing a temperature profile of the build.Type: ApplicationFiled: December 18, 2018Publication date: June 20, 2019Inventors: Jennifer Lynn Bennett, Kornel Ehmann, Jian Cao
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Patent number: 10098660Abstract: According to an exemplary embodiment of the present invention, a trocar is provided. The trocar includes: a sharp end; at least three concave cutting edges extended from the sharp end; and at least three concave cutting surfaces forming the sharp end and the at least three cutting edges.Type: GrantFiled: October 29, 2015Date of Patent: October 16, 2018Assignee: KOREA INSTITUTE OF MACHINERY & MATERIALSInventors: Jong-Kweon Park, Seung Kook Ro, Sung Cheul Lee, Byung-Sub Kim, Jaegu Kim, Kornel Ehmann, Peidong Han
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Patent number: 9956603Abstract: An apparatus for processing the surface of a workpiece includes: a first rotating body connected to a first rotating shaft and including a first protruding portion connected to a part of the outer circumference thereof; a second rotating body connected to a second rotating shaft and including a second protruding portion connected to a part of the outer circumference thereof; and a third rotating body connected to a third rotating shaft and including a third protruding portion connected to a part of the outer circumference thereof, wherein the first to third rotating shafts are in the same plane, a first angle between the first and second rotating shafts, a second angle between the first and third rotating shafts, and a third angle between the second and third rotating shafts are identical, outer circumferences of the first to third rotating shafts adjacent to one another form a pathway through which a workpiece can pass, and the size of the pathway is adjusted by moving the first rotating body.Type: GrantFiled: August 31, 2015Date of Patent: May 1, 2018Assignee: KOREA INSTITUTE OF MACHINERY & MATERIALSInventors: Jong-Kweon Park, Seung Kook Ro, Sung Cheul Lee, Byung-Sub Kim, Kornel Ehmann
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Publication number: 20170119431Abstract: According to an exemplary embodiment of the present invention, a trocar is provided. The trocar includes: a sharp end; at least three concave cutting edges extended from the sharp end; and at least three concave cutting surfaces forming the sharp end and the at least three cutting edges.Type: ApplicationFiled: October 29, 2015Publication date: May 4, 2017Inventors: Jong-Kweon PARK, Seung Kook Ro, Sung Cheul Lee, Byung-Sub Kim, Jaegu Kim, Kornel Ehmann, Peidong Han
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Publication number: 20170058999Abstract: An apparatus for processing the surface of a workpiece includes: a first rotating body connected to a first rotating shaft and including a first protruding portion connected to a part of the outer circumference thereof; a second rotating body connected to a second rotating shaft and including a second protruding portion connected to a part of the outer circumference thereof; and a third rotating body connected to a third rotating shaft and including a third protruding portion connected to a part of the outer circumference thereof, wherein the first to third rotating shafts are in the same plane, a first angle between the first and second rotating shafts, a second angle between the first and third rotating shafts, and a third angle between the second and third rotating shafts are identical, outer circumferences of the first to third rotating shafts adjacent to one another form a pathway through which a workpiece can pass, and the size of the pathway is adjusted by moving the first rotating body.Type: ApplicationFiled: August 31, 2015Publication date: March 2, 2017Inventors: Jong-Kweon PARK, Seung Kook RO, Sung Cheul LEE, Byung-Sub KIM, Kornel EHMANN
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Publication number: 20160358759Abstract: A system for laser-induced plasma micromachining of a work-piece includes a dielectric fluid, a dielectric fluid supply device, a laser, a processor, and a memory. The dielectric fluid supply device is arranged to hold a work-piece in the dielectric fluid or to direct the dielectric fluid onto the work-piece. The laser is arranged to emit a pulsed laser-beam. The processor is in electronic communication with the laser. The memory is in electronic communication with the processor. The memory includes programming code for execution by the processor. The programming code is programmed to direct the laser to deliver the pulsed laser-beam into the dielectric fluid to create a plasma generated at a focal point of the pulsed laser-beam in the dielectric fluid to micromachine, using the plasma, the work-piece disposed adjacent to the focal point.Type: ApplicationFiled: August 23, 2016Publication date: December 8, 2016Inventors: Kumar Pallav, Rajiv Malhotra, Ishan Saxena, Kornel Ehmann, Jian Cao
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Patent number: 9455127Abstract: A system for laser-induced plasma micromachining of a work-piece includes a dielectric fluid, a dielectric fluid supply device, a laser, a processor, and a memory. The dielectric fluid supply device is arranged to hold a work-piece in the dielectric fluid or to direct the dielectric fluid onto the work-piece. The laser is arranged to emit a pulsed laser-beam. The processor is in electronic communication with the laser. The memory is in electronic communication with the processor. The memory includes programming code for execution by the processor. The programming code is programmed to direct the laser to deliver the pulsed laser-beam into the dielectric fluid to create a plasma generated at a focal point of the pulsed laser-beam in the dielectric fluid to micromachine, using the plasma, the work-piece disposed adjacent to the focal point.Type: GrantFiled: April 8, 2015Date of Patent: September 27, 2016Assignee: Northwestern UniversityInventors: Kumar Pallav, Rajiv Malhotra, Ishan Saxena, Kornel Ehmann, Jian Cao
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Publication number: 20150294840Abstract: A system for laser-induced plasma micromachining of a work-piece includes a dielectric fluid, a dielectric fluid supply device, a laser, a processor, and a memory. The dielectric fluid supply device is arranged to hold a work-piece in the dielectric fluid or to direct the dielectric fluid onto the work-piece. The laser is arranged to emit a pulsed laser-beam. The processor is in electronic communication with the laser. The memory is in electronic communication with the processor. The memory includes programming code for execution by the processor. The programming code is programmed to direct the laser to deliver the pulsed laser-beam into the dielectric fluid to create a plasma generated at a focal point of the pulsed laser-beam in the dielectric fluid to micromachine, using the plasma, the work-piece disposed adjacent to the focal point.Type: ApplicationFiled: April 8, 2015Publication date: October 15, 2015Inventors: Kumar Pallav, Rajiv Malhotra, Ishan Saxena, Kornel Ehmann, Jian Cao
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Patent number: 7140814Abstract: A spade bit including a longitudinally extending shaft having a cutting member located at a distal end thereof. The cutting member comprises a pair of helically shaped, opposed blades joined along the longitudinal axis of the shaft and an axially extending pilot spur. The pilot spur defines a pair of cutting edges, and each of the blades defines a forward cutting edge joined with a respective cutting edge of the pilot spur.Type: GrantFiled: April 30, 2003Date of Patent: November 28, 2006Assignee: Irwin Industrial Tool CompanyInventors: Iqbal Singh, Kornel Ehmann