Patents by Inventor Jack C. Roberts
Jack C. Roberts 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: 9808987Abstract: A surrogate multilayered material and manufacturing method thereof includes a first fiber reinforced layer, the first reinforced layer including a crosslinked polymer and fibers, and a second fiber reinforced layer, the second reinforced layer including the crosslinked polymer and the fibers. A foam layer is disposed between the first and second fiber reinforced layers. Opposite faces of the foam layer are in direct contact with the first fiber reinforced layer and the second fiber reinforced layer. The foam layer has a compressive strength of about 3.5 to about 4.5 MPa, when measured as per ASTM-D-1621-73, and a shear strength of 1.50 to about 2.15 MPa, when measured as per ASTM-C-273.Type: GrantFiled: August 14, 2015Date of Patent: November 7, 2017Assignee: The Johns Hopkins UniversityInventors: Andrew C. Merkle, Jack C. Roberts, Catherine M. Carneal, Jeffrey M. Paulson, Matthew S. Johannes, Liming M. Voo
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Patent number: 9142146Abstract: A surrogate multilayered material includes a first fiber reinforced layer; the first reinforced layer including a crosslinked polymer and fibers; a second fiber reinforced layer; the second reinforced layer including the crosslinked polymer and the fibers; a foam layer; the foam layer disposed between the first fiber reinforced layer and the second fiber reinforced layer; where opposite faces of the foam layer are in direct contact with the first fiber reinforced layer and the second fiber reinforced layer; the foam layer having a compressive strength of about 3.5 to about 4.5 MPa, when measured as per ASTM-D-1621-73, and a shear strength of 1.50 to about 2.15 MPa, when measured as per ASTM-C-273.Type: GrantFiled: June 4, 2012Date of Patent: September 22, 2015Assignee: The Johns Hopkins UniversityInventors: Andrew C. Merkle, Jack C. Roberts, Catherine M. Carneal, Jeffrey M. Paulson, Matthew S. Johannes, Liming M. Voo
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Patent number: 9011158Abstract: A human surrogate neck model includes a spinal neck region containing cervical vertebrae. A biosimulant intervertebral material is inserted between the cervical vertebrae. The spinal neck region is surrounded by a first silicone material mixed with a polymeric cross-linking inhibitor. One or more elastic tension bands are anchored to a top interface and a bottom interface of the neck model. A second silicone material mixed with a polymeric cross-linking inhibitor is applied to surround the spinal neck region and the first silicone material and to embed the tension bands. One or more of the elastic tension bands and/or a concentration ratio of the first silicone material or second silicone material to the polymeric cross-linking inhibitor can be adjusted for variable test conditions to closely simulate or mimic the static and dynamic characteristics of a human neck in various scenarios.Type: GrantFiled: February 7, 2013Date of Patent: April 21, 2015Assignee: The Johns Hopkins UniversityInventors: Andrew C. Merkle, Jack C. Roberts, Ian D. Wing, Liming M. Voo, Craig B. Leese, Howard A. Conner
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Publication number: 20140302306Abstract: A surrogate multilayered material includes a first fiber reinforced layer; the first reinforced layer including a crosslinked polymer and fibers; a second fiber reinforced layer; the second reinforced layer including the crosslinked polymer and the fibers; a foam layer; the foam layer disposed between the first fiber reinforced layer and the second fiber reinforced layer; where opposite faces of the foam layer are in direct contact with the first fiber reinforced layer and the second fiber reinforced layer; the foam layer having a compressive strength of about 3.5 to about 4.5 MPa, when measured as per ASTM-D-1621-73, and a shear strength of 1.50 to about 2.15 MPa, when measured as per ASTM-C-273.Type: ApplicationFiled: June 4, 2012Publication date: October 9, 2014Applicant: THE JOHNS HOPKINS UNIVERSITYInventors: Andrew C. Merkle, Jack C. Roberts, Catherine M. Carneal, Jeffrey M. Paulson, Matthew S. Johannes, Liming M. Voo
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Publication number: 20140220530Abstract: A human surrogate neck model includes a spinal neck region containing cervical vertebrae. A biosimulant intervertebral material is inserted between the cervical vertebrae. The spinal neck region is surrounded by a first silicone material mixed with a polymeric cross-linking inhibitor. One or more elastic tension bands are anchored to a top interface and a bottom interface of the neck model. A second silicone material mixed with a polymeric cross-linking inhibitor is applied to surround the spinal neck region and the first silicone material and to embed the tension bands. One or more of the elastic tension bands and/or a concentration ratio of the first silicone material or second silicone material to the polymeric cross-linking inhibitor can be adjusted for variable test conditions to closely simulate or mimic the static and dynamic characteristics of a human neck in various scenarios.Type: ApplicationFiled: February 7, 2013Publication date: August 7, 2014Applicant: THE JOHNS HOPKINS UNIVERSITYInventors: Andrew C. Merkle, Jack C. Roberts, Ian D. Wing, Liming M. Voo, Craig B. Leese, Howard A. Conner
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Patent number: 8725449Abstract: A human surrogate head model (HSHM) to measure brain/skull displacement due to a physical force, such as due to an explosive, ballistic, or automotive crash type of event. A HSHM may include a plurality of magnetic field generators positioned stationary relative to a HSHM skull, each to generate a magnetic field oriented with respect to a corresponding one of multiple directions. The HSHM may include one or more electromagnetic force (EMF)-based displacement sensors, each of which may include three inductive coils oriented orthogonally with respect to one another and co-aligned about a central point. A signal processor may be implemented to separate signals generated by each coil of each EMF-based displacement sensor into a plurality of component magnitudes, each attributable to a corresponding one of the magnetic fields. A computer-implemented model may be implemented to correlate between the component magnitudes and a corresponding position and orientation of the displacement sensor.Type: GrantFiled: June 24, 2011Date of Patent: May 13, 2014Assignee: The Johns Hopkins UniversityInventors: Jack C. Roberts, Andrew C. Merkle, Bliss G. Carkhuff, Ian D. Wing, Craig B. Leese
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Publication number: 20120330599Abstract: A human surrogate head model (HSHM) to measure brain/skull displacement due to a physical force, such as due to an explosive, ballistic, or automotive crash type of event. A HSHM may include a plurality of magnetic field generators positioned stationary relative to a HSHM skull, each to generate a magnetic field oriented with respect to a corresponding one of multiple directions. The HSHM may include one or more electromagnetic force (EMF)-based displacement sensors, each of which may include three inductive coils oriented orthogonally with respect to one another and co-aligned about a central point. A signal processor may be implemented to separate signals generated by each coil of each EMF-based displacement sensor into a plurality of component magnitudes, each attributable to a corresponding one of the magnetic fields. A computer-implemented model may be implemented to correlate between the component magnitudes and a corresponding position and orientation of the displacement sensor.Type: ApplicationFiled: June 24, 2011Publication date: December 27, 2012Inventors: Jack C. Roberts, Andrew C. Merkle, Bliss G Carkhuff, Ian D. Wing, Craig B. Leese
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Patent number: 7556855Abstract: An impact resistant device is provided comprising a support matrix and a plurality of energy absorbing elements operatively connected to the support matrix, each element comprising at least one ceramic material and at least one strain rate sensitive material. The impact resistant device can be worn as body armor to protect the wearer from high velocity projectiles.Type: GrantFiled: August 13, 2008Date of Patent: July 7, 2009Assignees: The Johns Hopkins University, University of North TexasInventors: Paul J. Biermann, Jack C. Roberts, Richard Reidy
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Publication number: 20090029150Abstract: An impact resistant device is provided comprising a support matrix and a plurality of energy absorbing elements operatively connected to the support matrix, each element comprising at least one ceramic material and at least one strain rate sensitive material. The impact resistant device can be worn as body armor to protect the wearer from high velocity projectiles.Type: ApplicationFiled: August 13, 2008Publication date: January 29, 2009Inventors: Paul J. Biermann, Jack C. Roberts, Richard Reidy
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Patent number: 7413809Abstract: An impact resistant device is provided comprising a flexible support matrix and a plurality of energy absorbing elements operatively connected to the support matrix, each element comprising at least one ceramic material and at least one strain rate sensitive material. The impact resistant device can be worn as body armor to protect the wearer from high velocity projectiles.Type: GrantFiled: August 24, 2007Date of Patent: August 19, 2008Assignee: The Johns Hopkins UniversityInventors: Paul J. Biermann, Jack C. Roberts, Richard Reidy
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Patent number: 7261945Abstract: An impact resistant device is provided comprising a flexible support matrix and a plurality of energy absorbing elements operatively connected to the support matrix, each element comprising at least one ceramic material and at least one strain rate sensitive material. The impact resistant device can be worn as body armor to protect the wearer from high velocity projectiles.Type: GrantFiled: April 27, 2004Date of Patent: August 28, 2007Assignee: The Johns Hopkins UniversityInventors: Paul J. Biermann, Jack C. Roberts, Richard Reidy
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Patent number: 7114934Abstract: A structure that includes a plurality of cells of a cured resinous material. Each cell is joined to at least one other cell.Type: GrantFiled: October 2, 2003Date of Patent: October 3, 2006Assignee: The Johns Hopkins UniversityInventors: Paul J. Biermann, Jack C. Roberts
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Patent number: 6769286Abstract: An instrumented torso model that simulates anatomical features and measures the effects on a body caused by various types of impacts. Simulated bone having material properties similar to that of healthy human bone is surrounded by simulated tissue. At least one sensor array is attached to either or both of the simulated bone and the simulated tissue for measuring the effects of the impacts.Type: GrantFiled: September 27, 2002Date of Patent: August 3, 2004Assignee: The Johns Hopkins UniversityInventors: Paul J. Biermann, Jack C. Roberts, Russell P. Cain, Bliss G. Carkhuff, Michael Kleinberger
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Publication number: 20040067271Abstract: A structure that includes a plurality of cells of a cured resinous material. Each cell is joined to at least one other cell.Type: ApplicationFiled: October 2, 2003Publication date: April 8, 2004Inventors: Paul J. Biermann, Jack C. Roberts
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Patent number: 6602293Abstract: An orthopedic implant comprising a thermoplastic polymer or a composite comprising, in one embodiment, polyetheretherketone reinforced with 10% by volume of glass fibers, with an elastic modulus approximating the elastic modulus of bone. A porous coating is formed on the implant surface by creating a roughness thereon, by coating the surface with hydroxyapatite or by embedding a biocompatible material such as titanium in the surface. A two piece embodiment of the implant is joined and locked together, after the opposite ends of each piece are inserted in the medullary canal, using an interlocking mechanism comprising a fluted protrusion on one piece and a corresponding fluted cavity in the other piece with the fluted portions being complementarily tapered.Type: GrantFiled: November 1, 1996Date of Patent: August 5, 2003Assignee: The Johns Hopkins UniversityInventors: Paul J. Biermann, Jack C. Roberts, Amy A. Corvelli
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Publication number: 20030066365Abstract: An instrumented torso model that simulates anatomical features and measures the effects on a body caused by various types of impacts. Simulated bone having material properties similar to that of healthy human bone is surrounded by simulated tissue. At least one sensor array is attached to either or both of the simulated bone and the simulated tissue for measuring the effects of the impacts.Type: ApplicationFiled: September 27, 2002Publication date: April 10, 2003Inventors: Paul J. Biermann, Jack C. Roberts, Russell P. Cain, Bliss G. Carkhuff, Michael Kleinberger
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Publication number: 20020161062Abstract: A structure that includes a plurality of cells of a cured resinous material. Each cell is joined to at least one other cell.Type: ApplicationFiled: November 6, 2001Publication date: October 31, 2002Inventors: Paul J. Biermann, Jack C. Roberts
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Patent number: 6471519Abstract: A bone substitute that drills and cuts like bone for use in training and testing comprising an inner core of a foamable polymer or other soft material and an outer shell of a polymer such as an epoxy resin with a particulate filler such as aluminum oxide or silicon carbide added thereto together with, in some cases, titanium oxide to form a slurry for casting or molding around the inner core. Also provided is a method for making the bone substitute.Type: GrantFiled: September 11, 2000Date of Patent: October 29, 2002Assignee: The Johns Hopkins UniversityInventors: Paul J. Biermann, Jack C. Roberts, John A. Ecker
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Patent number: 6116911Abstract: A bone substitute that drills and cuts like bone for use in training and testing comprising an inner core of a foamable polymer or other soft material and an outer shell of a polymer such as an epoxy resin with a particulate filler such as aluminum oxide or silicon carbide added thereto together with, in some cases, titanium oxide to form a slurry for casting or molding around the inner core. Also provided is a method for making the bone substitute.Type: GrantFiled: March 27, 1997Date of Patent: September 12, 2000Assignee: The Johns Hopkins UniversityInventors: Paul J. Biermann, Jack C. Roberts, John A. Ecker
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Patent number: 6058590Abstract: Apparatus and methods for partially embedding a biocompatible material, such as a titanium coil, in the surface of a polymer bone implant to provide a porous coating for bone cells to grow through thereby promoting long term stabilization of the implant. In one embodiment, the coil is wrapped around the implant and placed in a manifold where rollers biased by springs press against the coil. The coil-implant is rotated and heated by a hot gas stream, the rollers-springs pushing the coil into the surface of the implant. In a second embodiment, the coil is compressed and placed onto a needle wire which is placed against the surface of the implant. The point of contact is heated and the implant is rotated with the needle wire creating a channel in the softened polymer and feeding the coil, which is simultaneously stretched, therein. The needle wire then pulls the polymer over a portion of the coil as it passes.Type: GrantFiled: March 12, 1999Date of Patent: May 9, 2000Assignee: The Johns Hopkins UniversityInventors: Jack C. Roberts, Paul J. Biermann, Amy A. Corvelli