Patents by Inventor Karl T. Hartwig
Karl T. Hartwig 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: 20220305539Abstract: A system and method provide a material with uniform micro-structure. In an embodiment, an equal channel angular extrusion system includes an interior mandrel. The interior mandrel includes an expanding shear material section and a contracting shear material section. In addition, the system includes a material. The material is disposed about a portion of the interior mandrel. Moreover, the system includes a pressure application device. The pressure application device applies pressure to the material to force the material to contact the expanding shear material section to provide an expanded post-shear material section. Pressure from the pressure application device applies pressure to the material to force the expanded post-shear material section to contact the contracting shear material section to provide a contracted shear material section.Type: ApplicationFiled: June 13, 2022Publication date: September 29, 2022Applicant: Shear Form, Inc.Inventors: Robert E. Barber, Karl T. Hartwig
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Patent number: 11358197Abstract: A system and method provide a material with uniform micro-structure. In an embodiment, an equal channel angular extrusion system includes an interior mandrel. The interior mandrel includes an expanding shear material section and a contracting shear material section. In addition, the system includes a material. The material is disposed about a portion of the interior mandrel. Moreover, the system includes a pressure application device. The pressure application device applies pressure to the material to force the material to contact the expanding shear material section to provide an expanded post-shear material section. Pressure from the pressure application device applies pressure to the material to force the expanded post-shear material section to contact the contracting shear material section to provide a contracted shear material section.Type: GrantFiled: October 2, 2017Date of Patent: June 14, 2022Assignee: Shear Form, Inc.Inventors: Robert E. Barber, Karl T. Hartwig
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Publication number: 20180043409Abstract: A system and method provide a material with uniform micro-structure. In an embodiment, an equal channel angular extrusion system includes an interior mandrel. The interior mandrel includes an expanding shear material section and a contracting shear material section. In addition, the system includes a material. The material is disposed about a portion of the interior mandrel. Moreover, the system includes a pressure application device. The pressure application device applies pressure to the material to force the material to contact the expanding shear material section to provide an expanded post-shear material section. Pressure from the pressure application device applies pressure to the material to force the expanded post-shear material section to contact the contracting shear material section to provide a contracted shear material section.Type: ApplicationFiled: October 2, 2017Publication date: February 15, 2018Applicant: Shear Form, Inc.Inventors: Robert E. Barber, Karl T. Hartwig
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Patent number: 9862013Abstract: An equal channel angular extrusion tool comprising a punch assembly, a die set assembly, a base assembly, and a bottom slider assembly. The punch assembly comprises a punch, a punch nose, and a punch trolley. The die set assembly comprises an inlet channel and a removable core. The base assembly comprises a lifting mechanism which further comprises a die lift cylinder and a hold down ram. The bottom slider assembly comprises an ejection ram. The tool also includes a billet. The billet may be disposed in the bottom slider assembly. Severe plastic deformation is applied to the billet in the bottom slider assembly.Type: GrantFiled: April 23, 2013Date of Patent: January 9, 2018Assignee: Shear Form, Inc.Inventors: Robert E. Barber, Karl T. Hartwig
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Patent number: 9776232Abstract: A system and method provide a material with uniform micro-structure. In an embodiment, an equal channel angular extrusion system includes an interior mandrel. The interior mandrel includes an expanding shear material section and a contracting shear material section. In addition, the system includes a material. The material is disposed about a portion of the interior mandrel. Moreover, the system includes a pressure application device. The pressure application device applies pressure to the material to force the material to contact the expanding shear material section to provide an expanded post-shear material section. Pressure from the pressure application device applies pressure to the material to force the expanded post-shear material section to contact the contracting shear material section to provide a contracted shear material section.Type: GrantFiled: September 7, 2012Date of Patent: October 3, 2017Assignee: Shear Form, Inc.Inventors: Karl T. Hartwig, Robert E. Barber
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Publication number: 20130276501Abstract: An equal channel angular extrusion tool comprising a punch assembly, a die set assembly, a base assembly, and a bottom slider assembly. The punch assembly comprises a punch, a punch nose, and a punch trolley. The die set assembly comprises an inlet channel and a removable core. The base assembly comprises a lifting mechanism which further comprises a die lift cylinder and a hold down ram. The bottom slider assembly comprises an ejection ram. The tool also includes a billet. The billet may be disposed in the bottom slider assembly. Severe plastic deformation is applied to the billet in the bottom slider assembly.Type: ApplicationFiled: April 23, 2013Publication date: October 24, 2013Applicant: Shear Form, Inc.Inventors: Robert E. Barber, Karl T. Hartwig
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Publication number: 20130239640Abstract: A system and method provide a material with uniform micro-structure. In an embodiment, an equal channel angular extrusion system includes an interior mandrel. The interior mandrel includes an expanding shear material section and a contracting shear material section. In addition, the system includes a material. The material is disposed about a portion of the interior mandrel. Moreover, the system includes a pressure application device. The pressure application device applies pressure to the material to force the material to contact the expanding shear material section to provide an expanded post-shear material section. Pressure from the pressure application device applies pressure to the material to force the expanded post-shear material section to contact the contracting shear material section to provide a contracted shear material section.Type: ApplicationFiled: September 7, 2012Publication date: September 19, 2013Applicant: SHEAR FORM, INC.Inventors: Robert E. Barber, Karl T. Hartwig
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Patent number: 6976380Abstract: Developing a texture of a material includes receiving a billet of material having an initial texture. The billet is associated with an extrusion procedure having extrusion routes executed as passes. The following is repeated for each pass to transform the initial texture to a developed texture: the billet is extruded through an inlet channel of an equal channel angular extrusion die according to the routes, and the billet is extruded through an outlet channel of the equal channel angular extrusion die according to the extrusion routes.Type: GrantFiled: January 24, 2003Date of Patent: December 20, 2005Assignee: The Texas A&M University SystemInventors: Karl T. Hartwig, Jr., Simone Leipert
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Patent number: 6883359Abstract: According to one embodiment of the present invention, an equal channel angular extrusion (ECAE) method includes extruding a billet of material along a first axis in a first orientation through an ECAE die, extruding the billet along the first axis in a second orientation through the ECAE die, the second orientation oriented approximately 180° from the first direction, extruding the billet along the first axis in a third orientation through the ECAE die, the third orientation oriented approximately 90° from the second orientation, and extruding the billet along the first axis in a fourth orientation through the ECAE die, the fourth orientation oriented approximately 180° from the third orientation.Type: GrantFiled: December 20, 2002Date of Patent: April 26, 2005Assignee: The Texas A&M University SystemInventor: Karl T. Hartwig, Jr.
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Patent number: 6787798Abstract: A method includes providing a superconducting material having pinning sites that can pin magnetic vortices within the superconducting material. The method also includes pinning one or more magnetic vortices at one or more of the pinning sites. An information storage apparatus includes a superconducting material, doped particles within the superconducting material that can pin dipole magnetic vortices, a magnetic tip that generates pinned magnetic vortices and a magnetic detector that detects pinned magnetic vortices.Type: GrantFiled: January 17, 2002Date of Patent: September 7, 2004Assignee: The Texas A&M University SystemInventors: Malcolm J. Andrews, Joseph H. Ross, Jr., John C. Slattery, Mustafa Yavuz, Ali Beskok, Karl T. Hartwig, Jr.
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Patent number: 5616191Abstract: The aluminum conductor having increase of its electric resistivity kept small at ultra low temperature of 30.degree. K. or lower even after cyclic strain is given at ultra low temperature, by controlling the crystal structure of the high purity aluminum conductor with purity of 99.9-99.9999 wt % so as to consist of (i) a veritable single or a substantially single crystal consisting of a bundle of sub-grains which have their crystal axes in the same direction or in the directions within a couple of degrees of deviation as a whole which has a specific crystal axis of <111> or <100> or the crystal axes close thereto in the longitudinal direction of the aluminum conductor, or (ii) a polycrystal most of which grains have respective specific crystal axes of <111> and/or <100>, or the crystal axes close thereto with respect to each grain in the longitudinal direction of the aluminum conductor, and have specific grain size of 0.01 mm to 3.0 mm.Type: GrantFiled: June 7, 1995Date of Patent: April 1, 1997Assignees: Sumitomo Chemical Co., Ltd., The Texas A & M University SystemsInventors: Akihiko Takahashi, Hitoshi Yasuda, Karl T. Hartwig, Lacy C. McDonald, Hong Zou
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Patent number: 5573861Abstract: The aluminum conductor having increase of its electric resistivity kept small at ultra low temperature of 30.degree. K. or lower even after cyclic strain is given at ultra low temperature, by controlling the crystal structure of the high purity aluminum conductor with purity of 99.9-99.9999 wt %. The crystal structure consist of (i) a veritable single or a substantially single crystal consisting of a bundle of sub-grains which have their crystal axes in the same direction or in the directions within a couple of degrees of deviation as a whole which has a specific crystal axis of <111> or <100> or the crystal axes close thereto in the longitudinal direction of the aluminum conductor, or (ii) a polycrystal most of which grains have respective specific crystal axes of <111> and/or <100>, or the crystal axes close thereto with respect to each grain in the longitudinal direction of the aluminum conductor, and have specific grain size of 0.01 mm to 3.0 mm.Type: GrantFiled: July 6, 1993Date of Patent: November 12, 1996Assignees: Sumitomo Chemical Co., Ltd., The Texas A & M University SystemsInventors: Akihiko Takahashi, Hitoshi Yasuda, Karl T. Hartwig, Lacy C. McDonald, Hong Zou