Patents by Inventor Ghatu Subhash
Ghatu Subhash 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: 20230375448Abstract: The present disclosure relates to compact waveguides. One example includes a primary bar, and an impedance-matched series of secondary bars with a number of turns, where turns provide at least one of: a turn that is perpendicular to an immediately preceding turn, and an increase in length of a subset of secondary bars for the turn.Type: ApplicationFiled: August 3, 2023Publication date: November 23, 2023Inventors: Ghatu Subhash, Richard Y. Leonard, III, Wilburn Whittington
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Publication number: 20220270768Abstract: Embodiments of the invention are directed to a method for production of a nuclear fuel pellet by spark plasma sintering (SPS), wherein a fuel pellet with more than 80% TD or more than 90% TD is formed. The SPS can be performed with the imposition of a controlled uniaxial pressure applied at the maximum temperature of the processing to achieve a very high density, in excess of 95% TD, at temperatures of 850 to 1600° C. The formation of a fuel pellet can be carried out in one hour or less. In an embodiment of the invention, a nuclear fuel pellet comprises UO2 and a highly thermally conductive material, such as SiC or diamond.Type: ApplicationFiled: April 19, 2022Publication date: August 25, 2022Inventors: Ghatu Subhash, Ronald Howard Baney, James S. Tulenko, Edward Mckenna, III, Lihao Ge, Sunghwan Yeo
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Patent number: 11410782Abstract: Embodiments of the invention are directed to a method for production of a nuclear fuel pellet by spark plasma sintering (SPS), wherein a fuel pellet with more than 80% TD or more than 90% TD is formed. The SPS can be performed with the imposition of a controlled uniaxial pressure applied at the maximum temperature of the processing to achieve a very high density, in excess of 95% TD, at temperatures of 850 to 1600° C. The formation of a fuel pellet can be carried out in one hour or less. In an embodiment of the invention, a nuclear fuel pellet comprises UO2 and a highly thermally conductive material, such as SiC or diamond.Type: GrantFiled: August 18, 2020Date of Patent: August 9, 2022Assignee: UNIVERSITY OF FLORIDA RESEARCH FOUNDATION, INCORPORATEDInventors: Ghatu Subhash, Ronald Howard Baney, James S. Tulenko, Edward McKenna, III, Lihao Ge, Sunghwan Yeo
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Publication number: 20220244149Abstract: The present disclosure relates to compact waveguides. One example includes a primary bar, and an impedance-matched series of secondary bars that is impedance-matched with the primary bar at a connection point that joins at least one secondary bar of the impedance-matched series of secondary bars to the primary bar. The secondary bars are noncollinear and nonconcentric with the primary bar.Type: ApplicationFiled: February 2, 2022Publication date: August 4, 2022Inventors: Ghatu Subhash, Richard Y. Leonard, III, Wilburn Whittington
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Publication number: 20210057115Abstract: Embodiments of the invention are directed to a method for production of a nuclear fuel pellet by spark plasma sintering (SPS), wherein a fuel pellet with more than 80% TD or more than 90% TD is formed. The SPS can be performed with the imposition of a controlled uniaxial pressure applied at the maximum temperature of the processing to achieve a very high density, in excess of 95% TD, at temperatures of 850 to 1600° C. The formation of a fuel pellet can be carried out in one hour or less. In an embodiment of the invention, a nuclear fuel pellet comprises UO2 and a highly thermally conductive material, such as SiC or diamond.Type: ApplicationFiled: August 18, 2020Publication date: February 25, 2021Inventors: Ghatu Subhash, Ronald Howard Baney, James S. Tulenko, Edward McKenna, Lihao Ge, Sunghwan Yeo
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Patent number: 10790065Abstract: Embodiments of the invention are directed to a method for production of a nuclear fuel pellet by spark plasma sintering (SPS), wherein a fuel pellet with more than 80% TD or more than 90% TD is formed. The SPS can be performed with the imposition of a controlled uniaxial pressure applied at the maximum temperature of the processing to achieve a very high density, in excess of 95% TD, at temperatures of 850 to 1600° C. The formation of a fuel pellet can be carried out in one hour or less. In an embodiment of the invention, a nuclear fuel pellet comprises UO2 and a highly thermally conductive material, such as SiC or diamond.Type: GrantFiled: August 15, 2013Date of Patent: September 29, 2020Assignee: University of Florida Research Foundation, Inc.Inventors: Ghatu Subhash, Ronald Howard Baney, James S. Tulenko, Edward McKenna, III, Lihao Ge, Sunghwan Yeo
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Publication number: 20200054492Abstract: A protective ankle brace has at least one pocket that houses at least one pouch, and at least one strap, and covers both sides of an ankle of a foot placed within the ankle brace. The pouch contain a dilatant fluid that is flexible to allow normal motion for walking and running but on a rapid movement or one with a high force, the dilatant resists movement. The at least one strap covers the one or two pockets to retain the pouch or pouches. The strap restricts the maximum eversion and inversion of the ankle brace when a force is applied and further protects the ankle within the ankle brace. The strap can be a bladder containing a dilatant fluid.Type: ApplicationFiled: October 25, 2017Publication date: February 20, 2020Inventors: Ghatu SUBHASH, Goeto DANTES
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Patent number: 9604885Abstract: A super-hard material is a late transition metal doped B4C ceramic. The lightweight ceramics can display Vickers Hardness in excess of 45 GPa. Transition metals, such as Ni, Co, Rh, and Pd can be doped into the boron carbide at levels up to about 2.5%. A spark plasma sintering (SPS) of an evacuated powder of B4C and the transition metal at temperatures up to 2000° C., and pressures of up to about 100 GPa forms a super-hard material as a body. The late transition metal doped B4C ceramic can be used for armor, grinding materials, thermoelectric materials, and catalysts.Type: GrantFiled: January 27, 2014Date of Patent: March 28, 2017Assignees: UNIVERSITY OF FLORIDA RESEARCH FOUNDATION, INC., UNIVERSITY OF CENTRAL FLORIDA RESEARCH FOUNDATION, INC.Inventors: Ghatu Subhash, Richard Blair
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Publication number: 20160370251Abstract: Testing methods and equipment are provided for fast, non-destructive testing of the quality of seal and/or integrity of a package. According to certain embodiments, dynamic impact characterization is used to determine whether a loss of pressure due to a leak in the package occurs. The methods and equipment can be used in-line with product packaging processes. According to one embodiment, an initial pressure is applied to a package under test. A region of the package is impacted with a force sufficient to create a disturbance to the package while not destroying the package by using an impacting rod. Force sensors/transducers in contact with the package and spaced a distance away from the impact region of the package detect a force signature from the impact. The existence of a leak is determined by evaluating the force signature.Type: ApplicationFiled: August 31, 2016Publication date: December 22, 2016Inventors: Ghatu Subhash, Bruce A. Welt
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Patent number: 9518891Abstract: Testing methods and equipment are provided for fast, non-destructive testing of the quality of seal and/or integrity of a package. According to certain embodiments, dynamic impact characterization is used to determine whether a loss of pressure due to a leak in the package occurs. The methods and equipment can be used in-line with product packaging processes. According to one embodiment, an initial pressure is applied to a package under test. A region of the package is impacted with a force sufficient to create a disturbance to the package while not destroying the package by using an impacting rod. Force sensors/transducers contact with the package and spaced a distance away from the impact region of the package detect a force signature from the impact. The existence of a leak is determined by evaluating the force signature.Type: GrantFiled: July 18, 2011Date of Patent: December 13, 2016Assignee: University of Florida Research Foundation, IncorporatedInventors: Ghatu Subhash, Bruce A. Welt
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Publication number: 20160053843Abstract: Disclosed herein is an energy absorbing article comprising a first energy absorbing device and a second energy absorbing device, where the first energy absorbing device and the second energy absorbing device each comprise a first chamber; where the first chamber has a predetermined shape and contains a fluid that can be expelled upon the first chamber being subjected to an impact; and a second chamber in fluid communication with the first chamber; the second chamber being operative to receive the fluid that is expelled from the first chamber and to return the fluid to the first chamber as a result of pressure generated by its own elasticity and without the assistance of any other external manmade force.Type: ApplicationFiled: March 21, 2014Publication date: February 25, 2016Inventors: Ghatu Subhash, Keith R. Peters
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Publication number: 20150316441Abstract: Embodiments relate to a method and apparatus for determining information relating to a leak in a package. In an embodiment, a solenoid/gravity system is used to rapidly pressurize a flexible package to a desired pressure and to rapidly withdraw the pressurizing agent, where another solenoid is used to rapidly and retractably impact a region on the package under test. Sensors are used to sense data corresponding to a wave in the package generated from the region of impact. The data is acquired and processed to determine information regarding a leak in the package, such as whether there is a leak in the package under test, the size of the leak, and/or the location of the leak.Type: ApplicationFiled: December 5, 2013Publication date: November 5, 2015Inventors: GHATU SUBHASH, SPYROS A. SVORONOS, AARON P. SIMON, ALEXANDER D. JESS, CHEUK TING HO, YANNIK K. WIGGEMANS, ALLAN M. AXELROD, MICHAEL E. WARKANDER, MICHAEL D. MAXEY
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Publication number: 20150221398Abstract: Embodiments of the invention are directed to a method for production of a nuclear fuel pellet by spark plasma sintering (SPS), wherein a fuel pellet with more than 80% TD or more than 90% TD is formed. The SPS can be performed with the imposition of a controlled uniaxial pressure applied at the maximum temperature of the processing to achieve a very high density, in excess of 95% TD, at temperatures of 850 to 1600° C. The formation of a fuel pellet can be carried out in one hour or less. In an embodiment of the invention, a nuclear fuel pellet comprises UO2 and a highly thermally conductive material, such as SiC or diamond.Type: ApplicationFiled: August 15, 2013Publication date: August 6, 2015Inventors: Ghatu Subhash, Ronald Howard Baney, James S. Tulenko, Edward Mckenna, III, Lihao Ge, Sunghwan Yeo
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Publication number: 20130111972Abstract: Testing methods and equipment are provided for fast, non-destructive testing of the quality of seal and/or integrity of a package. According to certain embodiments, dynamic impact characterization is used to determine whether a loss of pressure due to a leak in the package occurs. The methods and equipment can be used in-line with product packaging processes. According to one embodiment, an initial pressure is applied to a package under test. A region of the package is impacted with a force sufficient to create a disturbance to the package while not destroying the package by using an impacting rod. Force sensors/transducers contact with the package and spaced a distance away from the impact region of the package detect a force signature from the impact. The existence of a leak is determined by evaluating the force signature.Type: ApplicationFiled: July 18, 2011Publication date: May 9, 2013Applicant: UNIVERSITY OF FLORIDA RESEARCH FOUNDATION, INC `Inventor: Ghatu Subhash
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Publication number: 20120186003Abstract: Disclosed herein is an energy-absorbing device comprising a first layer; a second layer; the second layer being opposedly disposed to the first layer and in slideablecommunication with the first layer; the first layer and the second layer enclosing a space therebetween; the space being filled with a fluid that has a power law exponent ? of at least about 1.3 when measured in half cell split Hopkinson bar using Equation (3) below: ? ? w ? ma ? ? x = ? ? [ U h ] n = ? ? ? . n ( 3 ) where |?w|max is a maximum shear stress, ? is a shear strain rate, U is a characteristic velocity of the striker wall, h is a thickness of the space, n is a power law dimensional factor that represents an energy dissipating property of the fluid.Type: ApplicationFiled: January 24, 2012Publication date: July 26, 2012Applicant: UNIVERSITY OF FLORIDA RESEARCH FOUNDATION, INC.Inventors: Ian Michael Heger, Ghatu Subhash
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Patent number: 6343502Abstract: An apparatus and method for determining dynamic indentation hardness values of a material using a propagating stress wave to make an indentation in the material. The invention provides such values without any prior knowledge of the material properties and enables the dynamic indentation hardness values to be directly compared to static indentation hardness values for the material.Type: GrantFiled: August 3, 1998Date of Patent: February 5, 2002Assignee: Michigan Technological UniversityInventors: Ghatu Subhash, Abhijit Chandra, Brian J. Koeppel