Patents by Inventor Daniel M. Fragiadakis
Daniel M. Fragiadakis 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: 10161721Abstract: A lightweight armor system providing blast protection and ballistic protection against small arms fire, suitable for use in helmets, personnel or vehicle protection, and other armor systems. A hard substrate is coated on the front surface with a thin elastomeric polymer layer, in which hollow ceramic or metal spheres are encapsulated. The coating layer having a thin elastomeric polymer layer with encapsulated metal or ceramic hollow spheres can be stand-alone blast protection, or can be added to an underlying structure. The glass transition temperature of the polymer is preferably between negative fifty Celsius and zero Celsius.Type: GrantFiled: June 26, 2015Date of Patent: December 25, 2018Assignee: The United States of America, as represented by the Secretary of the NavyInventors: Charles M. Roland, Daniel M. Fragiadakis, Raymond M. Gamache, Carl B. Giller, Roshdy G. S. Barsoum
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Patent number: 9909843Abstract: A front-facing armor system utilizing a composite laminate backed by a high hardness substrate. The composite laminate comprises a series of first and second layers. The first layer of the bi-layer laminate system is a polymer with a density of at least 1.8 g/cm3 and having both an amorphous and crystalline phase, and having phase transformation pressure of at least 0.5 GPa at a temperature of 20° C. The second layer of each bi-layer provides acoustic impedance mismatch to generate reflections of the incident compression wave following ballistic impact. Under ballistic impact, the polymer comprising the armor system undergoes a shock-induced transition resulting in a marked change in microstructure and mechanical behavior, providing a significant kinetic energy absorption mechanism.Type: GrantFiled: April 4, 2017Date of Patent: March 6, 2018Assignee: The United States of America, as represented by the Secretary of the NavyInventors: Raymond M. Gamache, Charles M. Roland, Daniel M. Fragiadakis
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Patent number: 9835416Abstract: An armor system with a composite laminate having at least four alternating layers (two bi-layers) of a first material and a second material, the first material having a lower acoustic impedance than the second material. The first material is an elastomer and the second material can be a hard material such as steel, aluminum, or ceramic, or an elastomer with a higher acoustic impedance than the first material. The laminate can include many alternating layers of the first and second materials, and can be adhered or affixed to a thicker armor substrate. Additional protective elements such as corrugated metal-ceramic panels and armored glass cylinders can be added to improve resistance to armor piercing rounds, explosively formed penetrators, or other threats.Type: GrantFiled: April 12, 2011Date of Patent: December 5, 2017Assignee: The United States of America, as represented by the Secretary of the NavyInventors: Charles M. Roland, Daniel M. Fragiadakis, Raymond M. Gamache
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Patent number: 9400146Abstract: Methods for forming armored glass cylinders suitable for improving resistance of armor to armor piercing rounds, explosively formed penetrators, or other threats. Cool a cylindrical glass or ceramic element to a temperature below that of a cylindrical casing, place the cylindrical glass or ceramic element into the cylindrical casing while the cylindrical glass or ceramic element is cool, and seal the cylindrical casing and allow the temperature of the cylindrical glass or ceramic element to rise, such that the cylindrical casing compresses the cylindrical glass or ceramic element. Alternately, heat a metal cylindrical casing, press glass or ceramic into the cylinder while the metal cylinder is at an elevated temperature, seal the metal cylindrical casing while metal cylindrical casing is at an elevated temperature, and allow the metal cylinder to cool, such that when cooled, the cylindrical casing will compress the glass in all directions.Type: GrantFiled: February 23, 2016Date of Patent: July 26, 2016Assignee: The United States of America, as represented by the Secretary of the NavyInventors: Charles M. Roland, Daniel M. Fragiadakis, Raymond M. Gamache
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Patent number: 9297617Abstract: Methods for forming armored glass cylinders suitable for improving resistance of armor to armor piercing rounds, explosively formed penetrators, or other threats. Cool a cylindrical glass or ceramic element to a temperature below that of a cylindrical casing, place the cylindrical glass or ceramic element into the cylindrical casing while the cylindrical glass or ceramic element is cool, and seal the cylindrical casing and allow the temperature of the cylindrical glass or ceramic element to rise, such that the cylindrical casing compresses the cylindrical glass or ceramic element. Alternately, heat a metal cylindrical casing, press glass or ceramic into the cylinder while the metal cylinder is at an elevated temperature, seal the metal cylindrical casing while metal cylindrical casinger is at an elevated temperature, and allow the metal cylinder to cool, such that when cooled, the cylindrical casing will compress the glass in all directions.Type: GrantFiled: July 29, 2014Date of Patent: March 29, 2016Assignee: The United States of America, as represented by the Secretary of the NavyInventors: Charles M. Roland, Daniel M. Fragiadakis, Raymond M. Gamache
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Publication number: 20150377592Abstract: A lightweight armor system providing blast protection and ballistic protection against small arms fire, suitable for use in helmets, personnel or vehicle protection, and other armor systems. A hard substrate is coated on the front surface with a thin elastomeric polymer layer, in which hollow ceramic or metal spheres are encapsulated. The coating layer having a thin elastomeric polymer layer with encapsulated metal or ceramic hollow spheres can be stand-alone blast protection, or can be added to an underlying structure. The glass transition temperature of the polymer is preferably between negative fifty Celsius and zero Celsius.Type: ApplicationFiled: June 26, 2015Publication date: December 31, 2015Inventors: Charles M. Roland, Daniel M. Fragiadakis, Raymond M. Gamache, Carl B. Giller, Roshdy G. S. Barsoum
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Patent number: 9207048Abstract: An armor system with a composite laminate having at least four alternating layers (two bi-layers) of a first material and a second material, the first material having a lower acoustic impedance than the second material. The first material is a viscoelastic polymer with a glass transition temperature less than the expected operational temperature range, and the second material can be a hard material such as steel, aluminum, or ceramic. The laminate can include many alternating layers of elastomer and hard material, and can be adhered or affixed to a thicker armor substrate. The second material layer can be a layer of hollow or solid spheres. Additional protective elements such as front surface hemispheres or conical projections, and corrugated panels can be added to improve resistance to armor piercing rounds, explosively formed penetrators, or other threats.Type: GrantFiled: March 12, 2014Date of Patent: December 8, 2015Assignee: The United States of America, as represented by the Secretary of the NavyInventors: Charles M. Roland, Daniel M. Fragiadakis, Raymond M. Gamache
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Publication number: 20150147545Abstract: An armor system is formed of a substrate including an underlying substrate layer of less hard material and including a thin layer of harder material at a first face of the substrate, and an elastomeric material layer positioned at the first face of the substrate. The increased hardness of the thin hard layer increases the penetration resistance of the armor by increasing the elastomer's contribution to penetration resistance. The properties of the substrate can be independently selected, allowing the use of substrates with lower hardness, increasing the armor's ballistic performance, and lowering the weight of the armor.Type: ApplicationFiled: November 25, 2014Publication date: May 28, 2015Applicant: The Government of the US, as Represented by the Secretary of the NavyInventors: Charles M. Roland, Andrew Saab, Raymond M. Gamache, Daniel M. Fragiadakis
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Publication number: 20150061182Abstract: Methods for forming armored glass cylinders suitable for improving resistance of armor to armor piercing rounds, explosively formed penetrators, or other threats. Cool a cylindrical glass or ceramic element to a temperature below that of a cylindrical casing, place the cylindrical glass or ceramic element into the cylindrical casing while the cylindrical glass or ceramic element is cool, and seal the cylindrical casing and allow the temperature of the cylindrical glass or ceramic element to rise, such that the cylindrical casing compresses the cylindrical glass or ceramic element. Alternately, heat a metal cylindrical casing, press glass or ceramic into the cylinder while the metal cylinder is at an elevated temperature, seal the metal cylindrical casing while metal cylindrical casinger is at an elevated temperature, and allow the the metal cylinder to cool, such that when cooled, the cylindrical casing will compress the glass in all directions.Type: ApplicationFiled: July 29, 2014Publication date: March 5, 2015Applicant: The Government of the US, as represented by the Secretary of the NavyInventors: Charles M. Roland, Daniel M. Fragiadakis, Raymond M. Gamache
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Patent number: 8789454Abstract: An armor system with a composite laminate having at least four alternating layers (two bi-layers) of a first material and a second material, the first material having a lower acoustic impedance than the second material. The first material is a viscoelastic polymer with a glass transition temperature less than the expected operational temperature range, and the second material can be a hard material such as steel, aluminum, or ceramic. The laminate can include many alternating layers of elastomer and hard material, and can be adhered or affixed to a thicker armor substrate. Additional protective elements such as corrugated metal-ceramic panels and armored glass cylinders can be added to improve resistance to armor piercing rounds, explosively formed penetrators, or other threats.Type: GrantFiled: July 17, 2013Date of Patent: July 29, 2014Assignee: The United States of America, as represented by the Secretary of the NavyInventors: Charles M. Roland, Daniel M. Fragiadakis, Raymond M. Gamache
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Patent number: 8746122Abstract: An armor system with a composite laminate having at least four alternating layers (two bi-layers) of a first material and a second material, the first material having a lower acoustic impedance than the second material. The first material is a viscoelastic polymer with a glass transition temperature less than the expected operational temperature range, and the second material can be a hard material such as steel, aluminum, or ceramic. The laminate can include many alternating layers of elastomer and hard material, and can be adhered or affixed to a thicker armor substrate. Additional protective elements such as corrugated metal-ceramic panels and armored glass cylinders can be added to improve resistance to armor piercing rounds, explosively formed penetrators, or other threats.Type: GrantFiled: March 14, 2013Date of Patent: June 10, 2014Assignee: The Government of the United States of America, as represented by the Secretary of the NavyInventors: Charles M. Roland, Daniel M. Fragiadakis, Raymond M. Gamache