Patents by Inventor Aashish Rohatgi
Aashish Rohatgi 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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Publication number: 20230304114Abstract: Aluminum sheet stamping processes are provided that can include heating an aluminum sheet to a first temperature that is greater than ambient temperature; quenching the aluminum sheet to cool the aluminum sheet to a second temperature that is less than the first temperature; after the quenching allowing the aluminum sheet to rest at ambient temperature for at least 24 hours; and stamping the aluminum sheet to form a stamped component. Stamped aluminum components including one or more portions having an HRB hardness of greater than 87 are also provided. Processes are also provided for fabricating an aluminum component from an aluminum sheet. The processes can include modifying formability of at least one discrete portion of an aluminum sheet, and compressing and/or expanding at least a portion of the one discrete portion to form a fabricated component. The fabricated component can include at least one aluminum member comprising a compressed and/or expanded modified discrete portion.Type: ApplicationFiled: March 24, 2023Publication date: September 28, 2023Inventors: Aashish Rohatgi, Richard W. Davies, Mert Efe, Wahaz Nasim, Angel Ortiz, Piyush Upadhyay, Hrishikesh Das, Glenn J. Grant, Elizabeth V. Stephens
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Patent number: 11684959Abstract: Devices and methods for performing shear-assisted extrusion processes for forming extrusions of a desired composition from a feedstock material are provided. The processes can use a device having a scroll face having an inner diameter portion bounded by an outer diameter portion, and a member extending from the inner diameter portion beyond a surface of the outer diameter portion. Extrusion feedstocks and extrusion processes are provided for forming extrusions of a desired composition from a feedstock. The processes can include providing a feedstock having at least two different materials and engaging the materials with one another within a feedstock container. Methods for preparing metal sheets are provided that can include preparing a metal tube via shear assisted processing and extrusion; opening the metal tube to form a sheet having a first thickness; and rolling the sheet to a second thickness that is less than the first thickness.Type: GrantFiled: February 4, 2022Date of Patent: June 27, 2023Assignee: Battelle Memorial InstituteInventors: Scott A. Whalen, Vineet V. Joshi, Md. Reza-E-Rabby, Jens T. Darsell, Mageshwari Komarasamy, Curt A. Lavender, Glenn J. Grant, Aashish Rohatgi, William E. Frazier, III
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Publication number: 20230081786Abstract: A process for forming extruded products using a device having a scroll face configured to apply a rotational shearing force and an axial extrusion force to the same preselected location on material wherein a combination of the rotational shearing force and the axial extrusion force upon the same location cause a portion of the material to plasticize, flow and recombine in desired configurations. This process provides for a significant number of advantages and industrial applications, including but not limited to extruding tubes used for vehicle components with 50 to 100 percent greater ductility and energy absorption over conventional extrusion technologies, while dramatically reducing manufacturing costs.Type: ApplicationFiled: November 11, 2022Publication date: March 16, 2023Applicant: Battelle Memorial InstituteInventors: Vineet V. Joshi, Scott A. Whalen, Curt A. Lavender, Glenn J. Grant, MD. Reza-E-Rabby, Aashish Rohatgi, Jens T. Darsell
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Patent number: 11534811Abstract: A process for forming extruded products using a device having a scroll face configured to apply a rotational shearing force and an axial extrusion force to the same preselected location on material wherein a combination of the rotational shearing force and the axial extrusion force upon the same location cause a portion of the material to plasticize, flow and recombine in desired configurations. This process provides for a significant number of advantages and industrial applications, including but not limited to extruding tubes used for vehicle components with 50 to 100 percent greater ductility and energy absorption over conventional extrusion technologies, while dramatically reducing manufacturing costs.Type: GrantFiled: February 12, 2021Date of Patent: December 27, 2022Assignee: Battelle Memorial InstituteInventors: Vineet V. Joshi, Scott A. Whalen, Curt A. Lavender, Glenn J. Grant, Md. Reza-E-Rabby, Aashish Rohatgi, Jens T. Darsell
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Patent number: 11460059Abstract: Riveted assemblies are provided that can include: a first component having opposing first and second sidewalls; a second component having opposing third and fourth sidewalls, wherein the second sidewall of the first component abuts the third sidewall of the second component to bind and form an affixing interface comprising the second and third sidewall between the first component to the second component; and a rivet extending between a head along a shank to an end, the rivet piercing the first sidewall with the end of the rivet being between the first and fourth sidewalls. Methods for affixing at least two components using a rivet are also provided.Type: GrantFiled: March 5, 2021Date of Patent: October 4, 2022Assignee: Battelle Memorial InstituteInventors: Vineet V. Joshi, Sina Shahrezaei, Curt A. Lavender, Rob J. Seffens, Mark A. Rhodes, Darrell R. Herling, Aashish Rohatgi
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Publication number: 20220297174Abstract: Devices and methods for performing shear-assisted extrusion processes for forming extrusions of a desired composition from a feedstock material are provided. The processes can use a device having a scroll face having an inner diameter portion bounded by an outer diameter portion, and a member extending from the inner diameter portion beyond a surface of the outer diameter portion. Extrusion feedstocks and extrusion processes are provided for forming extrusions of a desired composition from a feedstock. The processes can include providing a feedstock having at least two different materials and engaging the materials with one another within a feedstock container. Methods for preparing metal sheets are provided that can include preparing a metal tube via shear assisted processing and extrusion; opening the metal tube to form a sheet having a first thickness; and rolling the sheet to a second thickness that is less than the first thickness.Type: ApplicationFiled: May 26, 2022Publication date: September 22, 2022Applicant: Battelle Memorial InstituteInventors: Scott A. Whalen, Vineet V. Joshi, MD. Reza-E-Rabby, Jens T. Darsell, Mageshwari Komarasamy, Curt A. Lavender, Glenn J. Grant, Aashish Rohatgi, William E. Frazier, III, Brandon Scott Taysom
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Publication number: 20220275818Abstract: Riveted assemblies are provided that can include: a first component having opposing first and second sidewalls; a second component having opposing third and fourth sidewalls, wherein the second sidewall of the first component abuts the third sidewall of the second component to bind and form an affixing interface comprising the second and third sidewall between the first component to the second component; and a rivet extending between a head along a shank to an end, the rivet piercing the first sidewall with the end of the rivet being between the first and fourth sidewalls. Methods for affixing at least two components using a rivet are also provided.Type: ApplicationFiled: May 12, 2022Publication date: September 1, 2022Applicant: BATTELLE MEMORIAL INSTITUTEInventors: Vineet V. Joshi, Sina Shahrezaei, Curt A. Lavender, Rob J. Seffens, Mark A. Rhodes, Darrell R. Herling, Aashish Rohatgi
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Publication number: 20220152677Abstract: Devices and methods for performing shear-assisted extrusion processes for forming extrusions of a desired composition from a feedstock material are provided. The processes can use a device having a scroll face having an inner diameter portion bounded by an outer diameter portion, and a member extending from the inner diameter portion beyond a surface of the outer diameter portion. Extrusion feedstocks and extrusion processes are provided for forming extrusions of a desired composition from a feedstock. The processes can include providing a feedstock having at least two different materials and engaging the materials with one another within a feedstock container. Methods for preparing metal sheets are provided that can include preparing a metal tube via shear assisted processing and extrusion; opening the metal tube to form a sheet having a first thickness; and rolling the sheet to a second thickness that is less than the first thickness.Type: ApplicationFiled: February 4, 2022Publication date: May 19, 2022Applicant: Battelle Memorial InstituteInventors: Scott A. Whalen, Vineet V. Joshi, MD. Reza-E-Rabby, Jens T. Darsell, Mageshwari Komarasamy, Curt A. Lavender, Glenn J. Grant, Aashish Rohatgi, William E. Frazier, III
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Publication number: 20210316350Abstract: A process for forming extruded products using a device having a scroll face configured to apply a rotational shearing force and an axial extrusion force to the same preselected location on material wherein a combination of the rotational shearing force and the axial extrusion force upon the same location cause a portion of the material to plasticize, flow and recombine in desired configurations. This process provides for a significant number of advantages and industrial applications, including but not limited to extruding tubes used for vehicle components with 50 to 100 percent greater ductility and energy absorption over conventional extrusion technologies, while dramatically reducing manufacturing costs.Type: ApplicationFiled: February 12, 2021Publication date: October 14, 2021Applicant: Battelle Memorial InstituteInventors: Vineet V. Joshi, Scott A. Whalen, Curt A. Lavender, Glenn J. Grant, MD. Reza-E-Rabby, Aashish Rohatgi, Jens T. Darsell
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Patent number: 11045851Abstract: A process for forming extruded products using a device having a scroll face configured to apply a rotational shearing force and an axial extrusion force to the same preselected location on material wherein a combination of the rotational shearing force and the axial extrusion force upon the same location cause a portion of the material to plasticize, flow and recombine in desired configurations. This process provides for a significant number of advantages and industrial applications, including but not limited to extruding tubes used for vehicle components with 50 to 100 percent greater ductility and energy absorption over conventional extrusion technologies, while dramatically reducing manufacturing costs.Type: GrantFiled: July 5, 2018Date of Patent: June 29, 2021Assignee: Battelle Memorial InstituteInventors: Vineet V. Joshi, Scott A. Whalen, Curt A. Lavender, Glenn J. Grant, MD. Reza-E-Rabby, Aashish Rohatgi, Jens T. Darsell
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Patent number: 11028470Abstract: A method for heat treating metal materials by passing electrical current through a metallic workpiece to heat the workpiece via Joule heating to a preselected temperature for a preselected period of time, based upon the formula I2×R×t, wherein I is current, R is resistance and t is time. The current may be a direct or an alternating one. Various configurations of the method are envisioned wherein multiple current inputs and outputs are attached to the metal material so as to selectively heat specific portions of the piece including irregular shapes and differing diameters.Type: GrantFiled: October 27, 2017Date of Patent: June 8, 2021Assignee: BATTELLE MEMORIAL INSTITUTEInventors: Aashish Rohatgi, Saumyadeep Jana
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Publication number: 20200009626Abstract: Devices and methods for performing shear-assisted extrusion processes for forming extrusions of a desired composition from a feedstock material are provided. The processes can use a device having a scroll face having an inner diameter portion bounded by an outer diameter portion, and a member extending from the inner diameter portion beyond a surface of the outer diameter portion. Extrusion feedstocks and extrusion processes are provided for forming extrusions of a desired composition from a feedstock. The processes can include providing a feedstock having at least two different materials and engaging the materials with one another within a feedstock container. Methods for preparing metal sheets are provided that can include preparing a metal tube via shear assisted processing and extrusion; opening the metal tube to form a sheet having a first thickness; and rolling the sheet to a second thickness that is less than the first thickness.Type: ApplicationFiled: September 5, 2019Publication date: January 9, 2020Applicant: Battelle Memorial InstituteInventors: Scott A. Whalen, Vineet V. Joshi, MD. Reza-E-Rabby, Jens T. Darsell, Mageshwari Komarasamy, Curt A. Lavender, Glenn J. Grant, Aashish Rohatgi, William E. Frazier, III
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Publication number: 20190283335Abstract: A method for solid state joining of dissimilar materials using a friction stir welding device wherein a pin is inserted through an aperture defined in a first material and a second material to hold the materials together and then held in place by friction stir welding a portion of the pin to a material adjacent said pin, or by friction stir welding a cap or plug that holds the pin in place to the adjacent material. The result is a connection or join wherein the central portion of the pin is not friction stir welded but the portions holding the pin in place (the ends or caps) generally are.Type: ApplicationFiled: March 26, 2019Publication date: September 19, 2019Applicant: BATTELLE MEMORIAL INSTITUTEInventors: Scott A. Whalen, MD. Reza-E-Rabby, Kenneth A. Ross, Aashish Rohatgi
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Patent number: 10369748Abstract: A method for solid state joining of dissimilar materials using a friction stir welding device wherein a pin is inserted through an aperture defined in a first material and a second material to hold the materials together and then held in place by friction stir welding a portion of the pin to a material adjacent said pin, or by friction stir welding a cap or plug that holds the pin in place to the adjacent material. The result is a connection or join wherein the central portion of the pin is not friction stir welded but the portions holding the pin in place (the ends or caps) generally are.Type: GrantFiled: October 26, 2017Date of Patent: August 6, 2019Assignee: BATTELLE MEMORIAL INSTITUTEInventors: Scott A. Whalen, Md. Reza-E-Rabby, Kenneth A. Ross, Aashish Rohatgi
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Publication number: 20190126561Abstract: A method for solid state joining of dissimilar materials using a friction stir welding device wherein a pin is inserted through an aperture defined in a first material and a second material to hold the materials together and then held in place by friction stir welding a portion of the pin to a material adjacent said pin, or by friction stir welding a cap or plug that holds the pin in place to the adjacent material. The result is a connection or join wherein the central portion of the pin is not friction stir welded but the portions holding the pin in place (the ends or caps) generally are.Type: ApplicationFiled: October 26, 2017Publication date: May 2, 2019Applicant: BATTELLE MEMORIAL INSTITUTEInventors: Scott A. Whalen, MD. Reza-E-Rabby, Kenneth A. Ross, Aashish Rohatgi
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Publication number: 20180311713Abstract: A process for forming extruded products using a device having a scroll face configured to apply a rotational shearing force and an axial extrusion force to the same preselected location on material wherein a combination of the rotational shearing force and the axial extrusion force upon the same location cause a portion of the material to plasticize, flow and recombine in desired configurations. This process provides for a significant number of advantages and industrial applications, including but not limited to extruding tubes used for vehicle components with 50 to 100 percent greater ductility and energy absorption over conventional extrusion technologies, while dramatically reducing manufacturing costs.Type: ApplicationFiled: July 5, 2018Publication date: November 1, 2018Applicant: BATTELLE MEMORIAL INSTITUTEInventors: Vineet V. Joshi, Scott A. Whalen, Curt A. Lavender, Glenn J. Grant, MD. Reza-E-Rabby, Aashish Rohatgi, Jens T. Darsell
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Publication number: 20180216216Abstract: A method for heat treating metal materials by passing electrical current through a metallic workpiece to heat the workpiece via Joule heating to a preselected temperature for a preselected period of time, based upon the formula I2×R×t, wherein I is current, R is resistance and t is time. The current may be a direct or an alternating one. Various configurations of the method are envisioned wherein multiple current inputs and outputs are attached to the metal material so as to selectively heat specific portions of the piece including irregular shapes and differing diameters.Type: ApplicationFiled: October 27, 2017Publication date: August 2, 2018Applicant: BATTELLE MEMORIAL INSTITUTEInventors: Aashish Rohatgi, Saumyadeep Jana
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Publication number: 20130287663Abstract: A system, sorbent formulations, methods of preparation, and methods are described that provide selective sorption and release of CO2 from CO2-containing gases such as syngas. The sorbent may include magnesium oxide (MgO) and a group-I alkali metal nitrate. The sorbent may also include a group-I alkali metal carbonate and/or a group-II alkaline-earth metal carbonate.Type: ApplicationFiled: February 25, 2013Publication date: October 31, 2013Applicants: UNIVERSITY OF CONNECTICUT, BATTELLE MEMORIAL INSTITUTEInventors: Keling Zhang, David L. King, Xiaohong S. Li, Liyu Li, Aashish Rohatgi, Prabhakar Singh
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Publication number: 20130116354Abstract: Methods are disclosed for making liquid crystalline polymer (LCP) foams and foam structures of various shapes and forms. LCP foams of the invention have a high compression strength suitable for high performance energy-absorption and energy-impact applications and devices.Type: ApplicationFiled: November 7, 2011Publication date: May 9, 2013Applicant: BATTELLE MEMORIAL INSTITUTEInventors: Aashish Rohatgi, Raymond S. Addleman, Bradley J. Busche
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Publication number: 20110300403Abstract: Fabrication techniques for and examples of metallic composite materials with high toughness, high strength, and lightweight for various structural, armor, and structural-armor applications. For example, various advanced materials based on metallic-intermetallic laminate (MIL) composite materials are described, including materials with passive damping features and built-in sensors.Type: ApplicationFiled: August 8, 2011Publication date: December 8, 2011Inventors: KENNETH S. VECCHIO, AASHISH ROHATGI, JOHN KOSMATKA