Patents by Inventor Chandrashekar Mantha
Chandrashekar Mantha 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: 11292190Abstract: A technique for depositing fiber-reinforced thermoplastic filament in an arc is disclosed that mitigates the centripetal forces that arise in the prior art. In accordance with the illustrative embodiment, the centripetal forces are ameliorated by twisting the filament while depositing it in an arc.Type: GrantFiled: December 26, 2017Date of Patent: April 5, 2022Assignee: Arevo, Inc.Inventor: Chandrashekar Mantha
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Patent number: 10857778Abstract: Methods and systems are disclosed for structurally analyzing and/or three-dimensional printing a part. The method may comprise receiving a model of the part for three-dimensional printing from a material comprising a matrix, receiving one or more properties for the material, and using the model, determining a print head tool path for use during the three-dimensional printing of the part. The method may also comprise determining a trajectory of at least one stiffness-contributing portion of the material based at least in part on the print head tool path, determining a performance of the part based at least in part on the one or more properties and the trajectory, and electronically outputting the performance of the part.Type: GrantFiled: April 4, 2017Date of Patent: December 8, 2020Assignee: Arevo, Inc.Inventors: Chandrashekar Mantha, Peter Woytowitz, Wiener Mondesir, Hemant Bheda
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Publication number: 20200307174Abstract: The present disclosure provides methods and systems for performing analysis on a part for printing. The method may comprise receiving, in computer memory, a computer model of the part and partitioning the computer model of the part into at least (i) a first region comprising one or more voids and (ii) a second region that is filled with a representation of a material for forming the part, to yield a partitioned computer model. At least a first mesh may be generated in the first region and at least a second mesh may be generated in the second region to yield a mesh array in the partitioned computer model. The mesh array, including the first mesh and the second mesh, may be to determine one or more properties of the part. The mesh array may be used to generate a print head toolpath usable to print the part.Type: ApplicationFiled: August 8, 2017Publication date: October 1, 2020Inventors: Peter WOYTOWITZ, Chandrashekar MANTHA, Wiener MONDESIR, Hemant BHEDA
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Patent number: 10703042Abstract: A method and apparatus for additive manufacturing wherein a fiber composite filament having an arbitrarily shaped cross section is softened and then flattened to tape-like form factor for incorporation into a part that is being additively manufactured.Type: GrantFiled: July 11, 2018Date of Patent: July 7, 2020Assignee: Arevo, Inc.Inventors: Armando Armijo, Hemant Bheda, Chandrashekar Mantha, Wiener Mondesir, Sohil Nandu, Riley Reese
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Publication number: 20190193328Abstract: A technique for depositing fiber-reinforced thermoplastic filament in an arc is disclosed that mitigates the centripetal forces that arise in the prior art. In accordance with the illustrative embodiment, the centripetal forces are ameliorated by twisting the filament while depositing it in an arc.Type: ApplicationFiled: December 26, 2017Publication date: June 27, 2019Applicant: Arevo, Inc.Inventor: Chandrashekar Mantha
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Patent number: 10290091Abstract: A filament inspection system is disclosed that gathers empirical data on the physical and chemical properties of filament. The illustrative embodiments need only a single video camera and two mirrors to image all of the exterior surfaces of one or more filaments simultaneously. These images can be used to analyze the physical properties of the filament. Furthermore, the illustrative embodiments need only a simple electrical network to gather empirical data on the permittivity of each segment of filament, which gives insights into the chemical properties of the filament. For example, embodiments of the present invention are particularly well suited for inspecting fiber-reinforced thermoplastic filament, and variations in the number, dispersion, wetting, and length of the fibers are all observable in variations in permittivity.Type: GrantFiled: July 6, 2018Date of Patent: May 14, 2019Assignee: Arevo, Inc.Inventors: Saeed Heysiattalab, Chandrashekar Mantha, Mohammad Dadkhah Tehrani, Michael Peter Thompson
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Patent number: 10239257Abstract: An apparatus and method for managing bending and other applied forces that are exerted on a filament of thermoplastic with reinforcing fibers in a 3D printing system during the deposition process that is associated with the manufacturing of an object. The quality of the manufactured object is enhanced through a process that comprises i) applying torque to certain portions of the solid filament in a manner that is commensurate with the expected motions of the deposition head while depositing those portions, but only after ii) heating each portion to a sufficient temperature. A heating device and a twisting device act on the filament while it is moving toward the deposition point and while under the control of a controller that is operating according to a computer model of the object being manufactured.Type: GrantFiled: June 18, 2018Date of Patent: March 26, 2019Assignee: Arevo, Inc.Inventor: Chandrashekar Mantha
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Patent number: 10195786Abstract: A method of heating thermoplastic filament in additive manufacturing systems, such as 3D printing systems. In accordance with the illustrative embodiment of the present invention, the temporal rate dE dt at which heat dE is added to a portion of a segment of filament is a function of the temporal rate d ? ? m dt at which the mass dm of the portion of the segment of filament is deposited. In particular, the temporal rate dE dt at which heat dE is added to a portion of a segment of filament is a non-linear function of the temporal rate d ? ? m dt .Type: GrantFiled: November 30, 2017Date of Patent: February 5, 2019Assignee: Arevo, Inc.Inventors: Armando Armijo, Chandrashekar Mantha
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Publication number: 20190009461Abstract: A method and apparatus for additive manufacturing wherein a fiber composite filament having an arbitrarily shaped cross section is softened and then flattened to tape-like form factor for incorporation into a part that is being additively manufactured.Type: ApplicationFiled: July 11, 2018Publication date: January 10, 2019Inventors: Armando Armijo, Hemant Bheda, Chandrashekar Mantha, Wiener Mondesir, Sohil Nandu, Riley Reese
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Patent number: 10052813Abstract: A method and apparatus for additive manufacturing wherein a fiber composite filament having an arbitrarily shaped cross section is softened and then flattened to tape-like form factor for incorporation into a part that is being additively manufactured.Type: GrantFiled: March 28, 2017Date of Patent: August 21, 2018Assignee: AREVO, INC.Inventors: Armando Armijo, Hemant Bheda, Chandrashekar Mantha, Wiener Mondesir, Sohil Nandu, Riley Reese
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Patent number: 10046511Abstract: An apparatus and method for managing bending and other applied forces that are exerted on a filament of thermoplastic with reinforcing fibers in a 3D printing system during the deposition process that is associated with the manufacturing of an object. The quality of the manufactured object is enhanced through a process that comprises i) applying torque to certain portions of the solid filament in a manner that is commensurate with the expected motions of the deposition head while depositing those portions, but only after ii) heating each portion to a sufficient temperature. A heating device and a twisting device act on the filament while it is moving toward the deposition point and while under the control of a controller that is operating according to a computer model of the object being manufactured.Type: GrantFiled: December 26, 2017Date of Patent: August 14, 2018Assignee: Arevo, Inc.Inventor: Chandrashekar Mantha
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Publication number: 20180043635Abstract: Methods and systems are disclosed for structurally analyzing and/or three-dimensional printing a part. The method may comprise receiving a model of the part for three-dimensional printing from a material comprising a matrix, receiving one or more properties for the material, and using the model, determining a print head tool path for use during the three-dimensional printing of the part. The method may also comprise determining a trajectory of at least one stiffness-contributing portion of the material based at least in part on the print head tool path, determining a performance of the part based at least in part on the one or more properties and the trajectory, and electronically outputting the performance of the part.Type: ApplicationFiled: April 4, 2017Publication date: February 15, 2018Inventors: Chandrashekar Mantha, Peter Woytowitz, Wiener Mondesir, Hemant Bheda
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Patent number: 9656429Abstract: Methods and systems are disclosed for structurally analyzing and/or three-dimensional printing a part. The method may comprise receiving a model of the part for three-dimensional printing from a material comprising a matrix, receiving one or more properties for the material, and using the model, determining a print head tool path for use during the three-dimensional printing of the part. The method may also comprise determining a trajectory of at least one stiffness-contributing portion of the material based at least in part on the print head tool path, determining a performance of the part based at least in part on the one or more properties and the trajectory, and electronically outputting the performance of the part.Type: GrantFiled: August 9, 2016Date of Patent: May 23, 2017Assignee: AREVO, INC.Inventors: Chandrashekar Mantha, Peter Woytowitz, Wiener Mondesir, Hemant Bheda