Patents by Inventor John T. Roth
John T. Roth 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: 10913100Abstract: A system includes a frame configured to hold a workpiece and first and second tool positioning assemblies configured to be opposed to each other on opposite sides of the workpiece. The first and second tool positioning assemblies each include a toolholder configured to secure a tool to the tool positioning assembly, a first axis assembly, a second axis assembly, and a third axis assembly. The first, second, and third axis assemblies are each configured to articulate the toolholder along a respective axis. Each axis assembly includes first and second guides extending generally parallel to the corresponding axis and disposed on opposing sides of the toolholder with respect to the corresponding axis. Each axis assembly includes first and second carriages articulable along the first and second guides of the axis assembly, respectively, in the direction of the corresponding axis.Type: GrantFiled: November 30, 2015Date of Patent: February 9, 2021Assignee: Northwestern UniversityInventors: Michael Beltran, Jian Cao, John T. Roth
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Publication number: 20160082498Abstract: A system includes a frame configured to hold a workpiece and first and second tool positioning assemblies configured to be opposed to each other on opposite sides of the workpiece. The first and second tool positioning assemblies each include a toolholder configured to secure a tool to the tool positioning assembly, a first axis assembly, a second axis assembly, and a third axis assembly. The first, second, and third axis assemblies are each configured to articulate the toolholder along a respective axis. Each axis assembly includes first and second guides extending generally parallel to the corresponding axis and disposed on opposing sides of the toolholder with respect to the corresponding axis. Each axis assembly includes first and second carriages articulable along the first and second guides of the axis assembly, respectively, in the direction of the corresponding axis.Type: ApplicationFiled: November 30, 2015Publication date: March 24, 2016Inventors: Michael Beltran, Jian Cao, John T. Roth
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Patent number: 9221091Abstract: A system includes a frame configured to hold a workpiece and first and second tool positioning assemblies configured to be opposed to each other on opposite sides of the workpiece. The first and second tool positioning assemblies each include a toolholder configured to secure a tool to the tool positioning assembly, a first axis assembly, a second axis assembly, and a third axis assembly. The first, second, and third axis assemblies are each configured to articulate the toolholder along a respective axis. Each axis assembly includes first and second guides extending generally parallel to the corresponding axis and disposed on opposing sides of the toolholder with respect to the corresponding axis. Each axis assembly includes first and second carriages articulable along the first and second guides of the axis assembly, respectively, in the direction of the corresponding axis.Type: GrantFiled: November 2, 2012Date of Patent: December 29, 2015Assignees: Northwestern University, The Penn State Reasearch FoundationInventors: Michael Beltran, Jian Cao, John T. Roth
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Publication number: 20140150510Abstract: A system includes a frame configured to hold a workpiece and first and second tool positioning assemblies configured to be opposed to each other on opposite sides of the workpiece. The first and second tool positioning assemblies each include a toolholder configured to secure a tool to the tool positioning assembly, a first axis assembly, a second axis assembly, and a third axis assembly. The first, second, and third axis assemblies are each configured to articulate the toolholder along a respective axis. Each axis assembly includes first and second guides extending generally parallel to the corresponding axis and disposed on opposing sides of the toolholder with respect to the corresponding axis. Each axis assembly includes first and second carriages articulable along the first and second guides of the axis assembly, respectively, in the direction of the corresponding axis.Type: ApplicationFiled: November 2, 2012Publication date: June 5, 2014Applicants: The Penn State Research Foundation, Northwestern UniversityInventors: Michael Beltran, Jian Cao, John T. Roth
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Method and apparatus for forming a blank as a portion of the blank receives pulses of direct current
Patent number: 7516640Abstract: A method is provided for forming a sheet metal blank or tubular blank in a metal forming tool, such as a sheet metal press or a media forming tool. The sheet metal press has an upper die and a lower die that are moved by a press to form the metal blank. The forming tool has a plurality of electrodes that are connected in an electrical circuit to a source of direct current. The electrodes provide pulses of the electric current to at least a portion of the blank. The method comprises loading the blank into the forming tool and closing the upper die and the lower die. The electrical circuit is completed between multiple electrodes through one or more portions of the blank. Electrical current is pulsed intermittently through the blank in a plurality of pulses.Type: GrantFiled: April 19, 2007Date of Patent: April 14, 2009Assignees: Penn State Research Foundation, Ford Global Technologies, LLCInventors: Sergey Fedorovich Golovashchenko, Albert Krause, John T. Roth -
Publication number: 20080277034Abstract: A method for controlling the work hardening of a metal component during cold forming by using an electric current passing through the component is provided. The method can include providing a cold forming machine with at least a pair of dies, the machine operable to perform a cold forming operation and apply an electric direct current to a metal component placed in contact with the dies. In addition, the method includes providing a metal component and placing the metal component between the at least a pair of dies. Thereafter, cold forming of the metal component is performed with an electric direct current applied to the component during at least part of the time the component is being cold formed. In some instances, the cold forming is compressive cold forming. The direct current can be applied before or after the cold forming has started and/or be terminated before or after the cold forming has stopped.Type: ApplicationFiled: May 9, 2008Publication date: November 13, 2008Applicant: The Penn State Research FoundationInventor: John T. Roth
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METHOD AND APPARATUS FOR FORMING A BLANK AS A PORTION OF THE BLANK RECEIVES PULSES OF DIRECT CURRENT
Publication number: 20080257007Abstract: A method is provided for forming a sheet metal blank or tubular blank in a metal forming tool, such as a sheet metal press or a media forming tool. The sheet metal press has an upper die and a lower die that are moved by a press to form the metal blank. The forming tool has a plurality of electrodes that are connected in an electrical circuit to a source of direct current. The electrodes provide pulses of the electric current to at least a portion of the blank. The method comprises loading the blank into the forming tool and closing the upper die and the lower die. The electrical circuit is completed between multiple electrodes through one or more portions of the blank. Electrical current is pulsed intermittently through the blank in a plurality of pulses.Type: ApplicationFiled: April 19, 2007Publication date: October 23, 2008Applicants: FORD GLOBAL TECHNOLOGIES, LLC, PENN STATE RESEARCH FOUNDATIONInventors: Sergey Fedorovich Golovashchenko, Albert Krause, John T. Roth