Patents by Inventor Lifeng Luo
Lifeng Luo 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: 11673202Abstract: A three stage power source for an electric arc welding process comprising an input stage having an AC input and a first DC output signal; a second stage in the form of an unregulated DC to DC converter having an input connected to the first DC output signal and converts the first DC output signal to a second DC output signal of the second stage; and a third stage to convert the second DC output signal to a welding output for welding wherein the input stage and the second stage are assembled into a first module within a first housing structure and the third stage is assembled into a second module having a separate housing structure connectable to the first module with long power cables. The second module also includes wire feeding systems and electronics.Type: GrantFiled: July 14, 2020Date of Patent: June 13, 2023Assignee: Lincoln Global, Inc.Inventors: Todd E. Kooken, Lifeng Luo, Matthew J. Krueger
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System and method for real-time computation and reporting of welding machine performance and metrics
Patent number: 10857613Abstract: A welding or cutting system is provided using a performance module which monitors the real-time performance of a welding or cutting system and displays this information on a user interface on the system. Other embodiments of the system also include a cost calculation function in which a cost of the welding or cutting operation is calculated.Type: GrantFiled: November 1, 2017Date of Patent: December 8, 2020Assignee: LINCOLN GLOBAL, INC.Inventors: Todd Kooken, Matthew Jon Krueger, Lifeng Luo -
Publication number: 20200338659Abstract: A three stage power source for an electric arc welding process comprising an input stage having an AC input and a first DC output signal; a second stage in the form of an unregulated DC to DC converter having an input connected to the first DC output signal and converts the first DC output signal to a second DC output signal of the second stage; and a third stage to convert the second DC output signal to a welding output for welding wherein the input stage and the second stage are assembled into a first module within a first housing structure and the third stage is assembled into a second module having a separate housing structure connectable to the first module with long power cables. The second module also includes wire feeding systems and electronics.Type: ApplicationFiled: July 14, 2020Publication date: October 29, 2020Inventors: Todd E. Kooken, Lifeng Luo, Matthew J. Krueger
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Patent number: 10744587Abstract: A three stage power source for an electric arc welding process comprising an input stage having an AC input and a first DC output signal; a second stage in the form of an unregulated DC to DC converter having an input connected to the first DC output signal and converts the first DC output signal to a second DC output signal of the second stage; and a third stage to convert the second DC output signal to a welding output for welding wherein the input stage and the second stage are assembled into a first module within a first housing structure and the third stage is assembled into a second module having a separate housing structure connectable to the first module with long power cables. The second module also includes wire feeding systems and electronics.Type: GrantFiled: December 15, 2017Date of Patent: August 18, 2020Assignee: LINCOLN GLOBAL, INC.Inventors: Todd E. Kooken, Lifeng Luo, Matthew J. Krueger
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Patent number: 10668551Abstract: Embodiments of modular-based power supply systems to support welding or cutting operations are disclosed. One embodiment includes a module rack having multiple slots configured to accept electrical input power from a single power drop within a welding or cutting environment. Multiple power supply modules are provided that are configured to be inserted into and withdrawn from the multiple slots. Each power supply module is configured to accept an electrical AC input derived from the electrical input power and provide an electrical DC output. The module rack is configured to support reconfigurable parallel electrical connections of subsets of the power supply modules. Each subset is configured to electrically connect to an output power supply stage to provide a dynamic waveform-controlled welding or cutting electrical signal to support generation of a single arc between an electrode and a workpiece.Type: GrantFiled: December 21, 2017Date of Patent: June 2, 2020Assignee: LINCOLN GLOBAL, INC.Inventors: Todd E. Kooken, Lifeng Luo
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Publication number: 20190193183Abstract: Embodiments of modular-based power supply systems to support welding or cutting operations are disclosed. One embodiment includes a module rack having multiple slots configured to accept electrical input power from a single power drop within a welding or cutting environment. Multiple power supply modules are provided that are configured to be inserted into and withdrawn from the multiple slots. Each power supply module is configured to accept an electrical AC input derived from the electrical input power and provide an electrical DC output. The module rack is configured to support reconfigurable parallel electrical connections of subsets of the power supply modules. Each subset is configured to electrically connect to an output power supply stage to provide a dynamic waveform-controlled welding or cutting electrical signal to support generation of a single arc between an electrode and a workpiece.Type: ApplicationFiled: December 21, 2017Publication date: June 27, 2019Inventors: Todd E. Kooken, Lifeng Luo
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Patent number: 10280972Abstract: A groove-type dynamic pressure gas radial bearing, comprises a bearing outer sleeve and a bearing inner sleeve, the outer circumferential face and the two end faces of the bearing inner sleeve are respectively provided with regular groove-type patterns, and the groove-type pattern in one end face is in mirror symmetry with the groove-type pattern in the other end face, and the axial contour lines of the groove-type patterns in the outer circumferential face and the radial contour lines of the groove-type patterns in the left and right end faces are in one-to-one correspondence and are connected with each other. The groove-type dynamic pressure gas radial bearing provided by the invention can achieve a load capacity of 1-3 kg and a limit rotating speed of 200,000 rpm to 450,000 rpm, it can realize the application of groove-type dynamic pressure gas radial bearings in ultra high-speed areas.Type: GrantFiled: May 19, 2015Date of Patent: May 7, 2019Inventor: Lifeng Luo
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Patent number: 10274007Abstract: A hybrid dynamic pressure gas thrust bearing, comprises two outer discs, an inner disc clamped between the two outer discs, and foil type elastic parts arranged between each outer disc and the inner disc; and the two end faces of the inner disc are respectively provided with regular groove-type patterns, and the groove-type pattern in one end face is in mirror symmetry with the groove-type pattern in the other end face. The hybrid dynamic pressure gas thrust provided by the invention has the rigidity characteristic of the high-limit rotating speed of the groove-type dynamic pressure gas thrust bearing, and has the flexible characteristic of the high impact resistance and the load capacity of the foil type dynamic pressure gas thrust bearing, it can meet the application of dynamic pressure gas thrust bearings in ultra high-speed areas under larger loads.Type: GrantFiled: May 19, 2015Date of Patent: April 30, 2019Inventor: Lifeng Luo
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Patent number: 10228015Abstract: A hybrid dynamic pressure gas radial bearing, which comprises a bearing outer sleeve, an inner sleeve and a foil type elastic part arranged between the bearing outer sleeve and the inner sleeve, the outer circumferential face and the left and right end faces of the bearing inner sleeve are respectively provided with regular groove-type patterns, and the groove-type patterns in one end face is in mirror symmetry with the groove-type pattern in the other end face, and the axial contour lines of the groove-type patterns in the outer circumference face and the radial contour lines of the groove-type patterns in the left and right end faces are in one-to-one correspondence and are connected with each other, has the rigidity characteristic of the high-limit rotating speed of the radial bearing of the groove-type dynamic pressure gas.Type: GrantFiled: May 19, 2015Date of Patent: March 12, 2019Inventor: Lifeng Luo
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Publication number: 20180156265Abstract: A hybrid dynamic pressure gas radial bearing, which comprises a bearing outer sleeve, an inner sleeve and a foil type elastic part arranged between the bearing outer sleeve and the inner sleeve, the outer circumferential face and the left and right end faces of the bearing inner sleeve are respectively provided with regular groove-type patterns, and the groove-type patterns in one end face is in mirror symmetry with the groove-type pattern in the other end face, and the axial contour lines of the groove-type patterns in the outer circumference face and the radial contour lines of the groove-type patterns in the left and right end faces are in one-to-one correspondence and are connected with each other, has the rigidity characteristic of the high-limit rotating speed of the radial bearing of the groove-type dynamic pressure gas.Type: ApplicationFiled: May 19, 2015Publication date: June 7, 2018Inventor: Lifeng LUO
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Publication number: 20180156267Abstract: A hybrid dynamic pressure gas thrust bearing, comprises two outer discs, an inner disc clamped between the two outer discs, and foil type elastic parts arranged between each outer disc and the inner disc; and the two end faces of the inner disc are respectively provided with regular groove-type patterns, and the groove-type pattern in one end face is in mirror symmetry with the groove-type pattern in the other end face. The hybrid dynamic pressure gas thrust provided by the invention has the rigidity characteristic of the high-limit rotating speed of the groove-type dynamic pressure gas thrust bearing, and has the flexible characteristic of the high impact resistance and the load capacity of the foil type dynamic pressure gas thrust bearing, it can meet the application of dynamic pressure gas thrust bearings in ultra high-speed areas under larger loads.Type: ApplicationFiled: May 19, 2015Publication date: June 7, 2018Inventor: Lifeng LUO
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Publication number: 20180119738Abstract: A groove-type dynamic pressure gas radial bearing, comprises a bearing outer sleeve and a bearing inner sleeve, the outer circumferential face and the two end faces of the bearing inner sleeve are respectively provided with regular groove-type patterns, and the groove-type pattern in one end face is in mirror symmetry with the groove-type pattern in the other end face, and the axial contour lines of the groove-type patterns in the outer circumferential face and the radial contour lines of the groove-type patterns in the left and right end faces are in one-to-one correspondence and are connected with each other. The groove-type dynamic pressure gas radial bearing provided by the invention can achieve a load capacity of 1-3 kg and a limit rotating speed of 200,000 rpm to 450,000 rpm, it can realize the application of groove-type dynamic pressure gas radial bearings in ultra high-speed areas.Type: ApplicationFiled: May 19, 2015Publication date: May 3, 2018Inventor: Lifeng LUO
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Publication number: 20180117699Abstract: A three stage power source for an electric arc welding process comprising an input stage having an AC input and a first DC output signal; a second stage in the form of an unregulated DC to DC converter having an input connected to the first DC output signal and converts the first DC output signal to a second DC output signal of the second stage; and a third stage to convert the second DC output signal to a welding output for welding wherein the input stage and the second stage are assembled into a first module within a first housing structure and the third stage is assembled into a second module having a separate housing structure connectable to the first module with long power cables. The second module also includes wire feeding systems and electronics.Type: ApplicationFiled: December 15, 2017Publication date: May 3, 2018Inventors: Todd E. Kooken, Lifeng Luo, Matthew J. Krueger
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Patent number: 9956639Abstract: A three stage power source for an electric arc welding process comprising an input stage having an AC input and a first DC output signal; a second stage in the form of an unregulated DC to DC converter having an input connected to the first DC output signal, a network of switches switched at a high frequency with a given duty cycle to convert the input into a first internal AC signal, an isolation transformer with a primary winding driven by the first internal high frequency AC signal and a secondary winding for creating a second internal high frequency AC signal and a rectifier to convert the second internal AC signal into a second DC output signal of the second stage; with a magnitude related to the duty cycle of the switches and, a third stage to convert the second DC output signal to a welding output for welding wherein the input stage and the second stage are assembled into a first module and the third stage is assembled into a second module connectable to the first module.Type: GrantFiled: February 7, 2005Date of Patent: May 1, 2018Assignee: LINCOLN GLOBAL, INCInventors: Todd E. Kooken, Lifeng Luo
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SYSTEM AND METHOD FOR REAL-TIME COMPUTATION AND REPORTING OF WELDING MACHINE PERFORMANCE AND METRICS
Publication number: 20180071850Abstract: A welding or cutting system is provided using a performance module which monitors the real-time performance of a welding or cutting system and displays this information on a user interface on the system. Other embodiments of the system also include a cost calculation function in which a cost of the welding or cutting operation is calculated.Type: ApplicationFiled: November 1, 2017Publication date: March 15, 2018Inventors: TODD KOOKEN, Matthew Jon KRUEGER, Lifeng LUO -
Patent number: 9855620Abstract: A three stage power source for an electric arc welding process comprising an input stage having an AC input and a first DC output signal; a second stage in the form of an unregulated DC to DC converter having an input connected to the first DC output signal and converts the first DC output signal to a second DC output signal of the second stage; and a third stage to convert the second DC output signal to a welding output for welding wherein the input stage and the second stage are assembled into a first module within a first housing structure and the third stage is assembled into a second module having a separate housing structure connectable to the first module with long power cables. The second module also includes wire feeding systems and electronics.Type: GrantFiled: October 2, 2014Date of Patent: January 2, 2018Assignee: LINCOLN GLOBAL, INC.Inventors: Todd E. Kooken, Lifeng Luo, Matthew Krueger
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System and method for real-time computation and reporting of welding machine performance and metrics
Patent number: 9839967Abstract: A welding or cutting system is provided using a performance module which monitors the real-time performance of a welding or cutting system and displays this information on a user interface on the system. Other embodiments of the system also include a cost calculation function in which a cost of the welding or cutting operation is calculated.Type: GrantFiled: November 8, 2011Date of Patent: December 12, 2017Assignee: LINCOLN GLOBAL, INC.Inventors: Todd Kooken, Matthew Jon Krueger, Lifeng Luo -
Patent number: 9751150Abstract: A power source for an electric arc welding process, wherein the power source comprises an input stage having an AC input and a first DC output signal; a second stage in the form of an unregulated DC to DC converter having an input connected to the first DC output signal and an output in the form of a second DC output signal electrically isolated from the first DC output signal and with a magnitude of a given ratio to the first DC output signal; and, a third stage to convert the second DC output signal to a welding output for the welding process.Type: GrantFiled: August 10, 2012Date of Patent: September 5, 2017Assignee: Lincoln Global, Inc.Inventors: Joseph A. Daniel, Todd E. Kooken, Lifeng Luo
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Patent number: D988606Type: GrantFiled: November 15, 2022Date of Patent: June 6, 2023Inventors: Dong Li, Lifeng Luo
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Patent number: D1023916Type: GrantFiled: August 22, 2022Date of Patent: April 23, 2024Assignee: Shenzhen AI Infinite Electronics Co., Ltd.Inventors: Lifeng Luo, Xiping Zhao