Patents by Inventor David S. Grummon
David S. Grummon 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: 20200197669Abstract: A guidewire having a first region having a first property, a second region having a second property different than the first property and a joint formed by a niobium coated nickel titanium alloy sleeve joined onto a first section of the first region and a second section of the second region. A method of joining two metal components for forming a guidewire is also provided including placing a first and second metal component into a sleeve, the first sleeve composed of a nickel titanium alloy and having niobium deposited thereon, and increasing the temperature of the first sleeve so the niobium reacts to form a joint joining the first and second components.Type: ApplicationFiled: December 27, 2019Publication date: June 25, 2020Applicant: Medplate LifeSciences CorporationInventors: David S. Grummon, Richard T. Briganti
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Publication number: 20190255639Abstract: A method of joining two metal components for forming medical devices. The method includes placing a first and second metal component into a sleeve, the first sleeve composed of a nickel titanium alloy and having niobium deposited thereon, and heating the first sleeve so the niobium melts and reacts to form a joint joining the first and second components. A medical device is also provided having a first region having a first property, a second region having a second property different than the first property and a joint formed by a niobium coated nickel titanium alloy sleeve melted onto a first section of the first region and a second section of the second region.Type: ApplicationFiled: February 8, 2019Publication date: August 22, 2019Applicant: Medplate LifeSciences CorporationInventors: David S. Grummon, Richard T. Briganti
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Patent number: 8465847Abstract: This invention discloses a method, using pure niobium as a transient liquid reactive braze material, for fabrication of cellular or honeycomb structures, wire space-frames or other sparse builtup structures or discrete articles using Nitinol (near-equiatomic titanium-nickel alloy) and related shape-memory and superelastic alloys. Nitinol shape memory alloys (SMAs), acquired in a form such as corrugated sheet, discrete tubes or wires, may be joined together using the newly discovered joining technique. Pure niobium when brought into contact with nitinol at elevated temperature, liquefies at temperatures below the melting point and flows readily into capillary spaces between the elements to be joined, thus forming a strong joint.Type: GrantFiled: August 7, 2010Date of Patent: June 18, 2013Assignees: The Regents of the University of Michigan, Board of Trustees of Michigan State UniversityInventors: John A. Shaw, David S. Grummon
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Patent number: 8273194Abstract: This invention discloses a method, using pure niobium as a transient liquid reactive braze material, for fabrication of cellular or honeycomb structures, wire space-frames or other sparse builtup structures or discrete articles using Nitinol (near-equiatomic titanium-nickel alloy) and related shape-memory and superelastic alloys. Nitinol shape memory alloys (SMAs), acquired in a form such as corrugated sheet, discrete tubes or wires, may be joined together using the newly discovered joining technique. Pure niobium when brought into contact with nitinol at elevated temperature, liquefies at temperatures below the melting point and flows readily into capillary spaces between the elements to be joined, thus forming a strong joint.Type: GrantFiled: August 7, 2010Date of Patent: September 25, 2012Assignee: Board of Trustees of Michigan State University the Regents of the University of MichiganInventors: John A. Shaw, David S. Grummon
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Patent number: 7896222Abstract: This invention discloses a method, using pure niobium as a transient liquid reactive braze material, for fabrication of cellular or honeycomb structures, wire space-frames or other sparse builtup structures or discrete articles using Nitinol (near equiatomic titanium-nickel alloy) and related shape-memory and superelastic alloys. Nitinol shape memory alloys (SMAs), acquired in a form such as corrugated sheet, discrete tubes or wires, may be joined together using the newly discovered technique. Pure niobium when brought into contact with Nitinol at elevated temperature, liquefies at temperatures below the melting point and flows readily into capillary spaces between the elements to be joined, thus forming a strong joint. A series of diagrams of the interface at various stages of brazing is illustrated by FIG. 10.Type: GrantFiled: September 30, 2005Date of Patent: March 1, 2011Assignees: Regents of The University of Michigan, Board of Trustees of Michigan State UniversityInventors: John A. Shaw, David S Grummon
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Publication number: 20110008643Abstract: This invention discloses a method, using pure niobium as a transient liquid reactive braze material, for fabrication of cellular or honeycomb structures, wire space-frames or other sparse builtup structures or discrete articles using Nitinol (near-equiatomic titanium-nickel alloy) and related shape-memory and superelastic alloys. Nitinol shape memory alloys (SMAs), acquired in a form such as corrugated sheet, discrete tubes or wires, may be joined together using the newly discovered joining technique. Pure niobium when brought into contact with nitinol at elevated temperature, liquefies at temperatures below the melting point and flows readily into capillary spaces between the elements to be joined, thus forming a strong joint.Type: ApplicationFiled: August 7, 2010Publication date: January 13, 2011Applicants: THE REGENTS OF THE UNIVERSITY OF MICHIGAN, BOARD OF TRUSTEES OF MICHIGAN STATE UNIVERSITYInventors: John A. Shaw, David S. Grummon
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Publication number: 20110009979Abstract: This invention discloses a method, using pure niobium as a transient liquid reactive braze material, for fabrication of cellular or honeycomb structures, wire space-frames or other sparse builtup structures or discrete articles using Nitinol (near-equiatomic titanium-nickel alloy) and related shape-memory and superelastic alloys. Nitinol shape memory alloys (SMAs), acquired in a form such as corrugated sheet, discrete tubes or wires, may be joined together using the newly discovered joining technique. Pure niobium when brought into contact with nitinol at elevated temperature, liquefies at temperatures below the melting point and flows readily into capillary spaces between the elements to be joined, thus forming a strong joint.Type: ApplicationFiled: August 7, 2010Publication date: January 13, 2011Applicants: THE REGENTS OF THE UNIVERSITY OF MICHIGAN, BOARD OF TRUSTEES OF MICHIGAN STATE UNIVERSITYInventors: John A. Shaw, David S. Grummon
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Patent number: 7690621Abstract: A method for producing a plurality of thin film actuators is disclosed. The method includes depositing a film of a shape memory alloy material onto a polyimide film to form a shape memory alloy construction. The shape memory alloy construction is strained from 2 to 8%. Post processing is conducted on the shape memory alloy construction after the step of imparting a 2 to 8% strain. This post processing can be the deposition of additional layers of the slicing of the actuators. Various shape memory metal actuators are disclosed.Type: GrantFiled: April 15, 2004Date of Patent: April 6, 2010Assignee: Board of Trustees Operating Michigan State UniversityInventor: David S. Grummon
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Patent number: 7563334Abstract: A method for forming a two-way shape memory surface includes thermomechanically training a shape memory alloy under substantially constant indentation strain. Thermomechanical training includes removeably securing an indenter to a surface of the shape memory alloy in its martensite phase, so that an indent is formed in the surface. The shape memory alloy is then heated to its austenite phase while the indenter is secured thereto. The shape memory alloy is then quenched to its martensite phase while the indenter is secured thereto. After thermomechanical training, the shape memory alloy surface exhibits a first indent depth when in its martensite phase, and a second, different indent depth when in its austenite phase. Also disclosed herein is a method for forming one-way and two-way reversible surface protrusions on shape memory alloys.Type: GrantFiled: November 16, 2006Date of Patent: July 21, 2009Assignee: GM Global Technology Operations, Inc.Inventors: Yijun Zhang, Yang T. Cheng, David S. Grummon
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Publication number: 20090047489Abstract: Disclosed are composite articles having adjustable surface morphologies, methods of making the composite articles, and methods of using the composite articles. The composite articles generally include an active layer comprising a shape memory material configured to undergo a change in property upon receipt of an activation signal, a bias layer configured to provide a mechanism for the composite article to return to a first shape from a second shape, and an activation device for providing the activation signal to the shape memory material.Type: ApplicationFiled: August 16, 2007Publication date: February 19, 2009Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.Inventors: David S. Grummon, Yang T. Cheng
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Publication number: 20080290141Abstract: This invention discloses a method, using pure niobium as a transient liquid reactive braze material, for fabrication of cellular or honeycomb structures, wire space-frames or other sparse builtup structures or discrete articles using Nitinol (near equiatomic titanium-nickel alloy) and related shape-memory and superelastic alloys. Nitinol shape memory alloys (SMAs), acquired in a form such as corrugated sheet, discrete tubes or wires, may be joined together using the newly discovered technique. Pure niobium when brought into contact with Nitinol at elevated temperature, liquefies at temperatures below the melting point and flows readily into capillary spaces between the elements to be joined, thus forming a strong joint. A series of diagrams of the interface at various stages of brazing is illustrated by FIG. 10.Type: ApplicationFiled: September 30, 2005Publication date: November 27, 2008Applicants: The Regents of the University of Michigan, Board of Trustees of Michigan State UniversityInventors: John A. Shaw, David S. Grummon
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Patent number: 7060140Abstract: A self-healing tribological surface comprises a shape memory material. The self-healing tribological surface can be used for recovering a scratches and/or indentations in the surface. Processes for recovering scratches or indentations generally comprises forming a shape memory material onto the surface; scratching or indenting the surface; and heating an area about the scratch or indentation, wherein a depth of the scratch or the indentation decreases after heating as compared to the depth prior to heating.Type: GrantFiled: April 8, 2003Date of Patent: June 13, 2006Assignees: General Motors Corporation, Michigan State UniversityInventors: Yang-Tse Cheng, Wangyang Ni, Michael J. Lukitsch, Anita M. Weiner, David S. Grummon
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Patent number: 7005195Abstract: A material and method for adhering at least two materials that includes the step of interposing at least one intermediate layer between the two materials and associated adhesion material. The materials to be adhered exhibit at least one characteristic dissimilarity and the intermediate material interposed contains at least one shape memory alloy, the shape memory alloy capable of exhibiting superelasticity.Type: GrantFiled: February 8, 2005Date of Patent: February 28, 2006Assignees: General Motors Corporation, Michigan State UniversityInventors: Yang-Tse Cheng, Wangyang Ni, Leonid Charles Lev, Michael J. Lukitsch, David S. Grummon, Anita M. Weiner
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Patent number: 6866730Abstract: A material and method for adhering at least two materials that includes the step of interposing at least one intermediate layer between the two materials and associated adhesion material. The materials to be adhered exhibit at least one characteristic dissimilarity and the intermediate material interposed contains at least one shape memory alloy, the shape memory alloy capable of exhibiting -superelasticity.Type: GrantFiled: March 21, 2003Date of Patent: March 15, 2005Assignees: General Motors Corporation, Michigan State UniversityInventors: Yang-Tse Cheng, Wangyang Ni, Leonid Charles Lev, Michael J. Lukitsch, David S. Grummon, Anita M. Weiner
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Publication number: 20040202888Abstract: A self-healing tribological surface comprises a shape memory material. The self-healing tribological surface can be used for recovering a scratches and/or indentations in the surface. Processes for recovering scratches or indentations generally comprises forming a shape memory material onto the surface; scratching or indenting the surface; and heating an area about the scratch or indentation, wherein a depth of the scratch or the indentation decreases after heating as compared to the depth prior to heating.Type: ApplicationFiled: April 8, 2003Publication date: October 14, 2004Inventors: Yang-Tse Cheng, Wangyang Ni, Michael J. Lukitsch, Anita M. Weiner, David S. Grummon
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Publication number: 20040185291Abstract: A material and method for adhering at least two materials that includes the step of interposing at least one intermediate layer between the two materials and associated adhesion material. The materials to be adhered exhibit at least one characteristic dissimilarity and the intermediate material interposed contains at least one shape memory alloy, the shape memory alloy capable of exhibiting superelasticity.Type: ApplicationFiled: March 21, 2003Publication date: September 23, 2004Inventors: Yang-Tse Cheng, Wangyang Ni, Leonid Charles Lev, Michael J. Lukitsch, David S. Grummon, Anita Miriam Weiner
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Patent number: 6260818Abstract: The present invention discloses various embodiments of a thin film fluid control system (10, 110, 220) for controlling fluid flow through tubular conduits (24, 124, 224). The system is designed such that a shape memory alloy (14, 114, 214) is transformed between austenitic and martensitic phases to constrict or open the tubular conduit as desired.Type: GrantFiled: August 25, 2000Date of Patent: July 17, 2001Assignee: Board of Trustees Operating Michigan State UniversityInventor: David S. Grummon