Patents Assigned to Southwest Research Institute
  • Patent number: 9927005
    Abstract: A gear train including a rotatable drive shaft and a clutch roller in rotatable contact with the drive shaft or mounted on the drive shaft. A first wobble gear and a second wobble gear are suspended around the drive shaft, wherein the first wobble gear is affixed to and concentric with the second wobble gear and the clutch roller is preloaded against the first and second wobble gears. A first ring gear surrounding and engaged by the first wobble gear; and a second ring gear surrounding and engaged by the second wobble gear. The ring gears being coaxial and rotatable relative to one another. The drive shaft rotates the clutch roller, which drives the first and second wobble gears, such that the wobble gears rotate around the drive shaft and at least one of the first and second ring gears rotate around the common axis.
    Type: Grant
    Filed: July 28, 2016
    Date of Patent: March 27, 2018
    Assignee: SOUTHWEST RESEARCH INSTITUTE
    Inventors: Paul B. Hvass, Glynn R. Bartlett
  • Patent number: 9879339
    Abstract: A method of depositing Ni—Cr and Si coatings onto a turbine component comprising supplying a Ni—Cr target and Si target with a dual-gun magnetron sputtering system; introducing inert gas and negatively biasing the magnet assembly; grounding or negatively biasing the turbine component to be coated; rotating the turbine component, wherein the turbine component has a surface; and forming a Ni—Cr and Si coating on the component surface.
    Type: Grant
    Filed: March 20, 2013
    Date of Patent: January 30, 2018
    Assignee: SOUTHWEST RESEARCH INSTITUTE
    Inventor: Kuang-Tsan Kenneth Chiang
  • Patent number: 9874193
    Abstract: A method of operating an dedicated exhaust gas recirculation engine including a water gas shift catalyst by supplying ambient air and fuel to a dedicated cylinder at a first fuel to air equivalence ratio in the range of greater than 1.0 to 1.6 for a first number of engine cycles and, for a second number of engine cycles, supplying ambient air and fuel to the dedicated cylinder at a second fuel to air equivalence ratio in the range of 0.7 to less than 1.0. During the second number of cycles, spark timing of the dedicated cylinder is adjusted and a time delay when exhaust recirculated from the dedicated cylinder will be inducted into the cylinders is determined. At the end of the time delay, a second spark timing of the main cylinder is adjusted and the amount of fuel supplied to the main cylinders is increased.
    Type: Grant
    Filed: July 29, 2016
    Date of Patent: January 23, 2018
    Assignee: SOUTHWEST RESEARCH INSTITUTE
    Inventors: Raphael Gukelberger, Gordon J. J. Bartley
  • Patent number: 9869216
    Abstract: A cooling system and method of using a cooling system for an engine equipped with an exhaust gas recirculation (EGR) system. A pump provides pressure for circulating liquid through the cooling system. The cooling system has two loops: an engine cooling loop and an EGR cooling loop. The engine cooling loop cools the engine in a conventional manner. The EGR cooling loop goes first to an EGR cooler and next to an oil cooler. The heat exchange at the EGR cooler results in warmed coolant being delivered to the oil cooler, where it warms engine oil. Warm-up time for engine oil is thereby decreased.
    Type: Grant
    Filed: February 2, 2015
    Date of Patent: January 16, 2018
    Assignee: SOUTHWEST RESEARCH INSTITUTE
    Inventors: Terrence F. Alger, II, Christopher J. Chadwell
  • Patent number: 9869220
    Abstract: An apparatus and method for removal of gas phase artifacts from engine exhaust undergoing evaluation for the presence of particulate matter as collected on a particulate matter filter. More specifically, the disclosure relates to an apparatus and method for removal of gas phase artifacts from engine exhaust being tested and prior to the exhaust reaching a particulate matter (PM) filter. Such removal provides that the PM filter indicates relatively more accurate evaluation of the particulate matter present.
    Type: Grant
    Filed: April 16, 2014
    Date of Patent: January 16, 2018
    Assignee: SOUTHWEST RESEARCH INSTITUTE
    Inventor: Imad Said Abdul-Khalek
  • Patent number: 9845747
    Abstract: A method of controlling fuel injection to the cylinders of an internal combustion engine, the engine having exhaust gas recirculation (EGR) from at least one dedicated EGR (D-EGR) cylinder, with the other cylinders being main cylinders. The D-EGR cylinder is run at a richer equivalence ratio than the main cylinders, with the goal of providing increased H2 and CO in the recirculated exhaust. The rich limit of the D-EGR cylinder is maximized by dividing the fuel injection into multiple fuel injection events, with each fuel injection event occurring during the intake valve lift period of the engine cycle.
    Type: Grant
    Filed: May 14, 2016
    Date of Patent: December 19, 2017
    Assignee: SOUTHWEST RESEARCH INSTITUTE
    Inventors: Bradley D. Denton, Raphael Gukelberger, Christopher J. Chadwell
  • Patent number: 9803571
    Abstract: A method, used with dual-fuel engine, of controlling the amount of gaseous fuel delivered to the engine. At operating conditions that result in an equivalence ratio below a predetermined threshold (which typically occur at mid or part loads), it is determined whether better performance and/or lower emissions can be achieved by reducing gaseous fuel to some cylinders and increasing gaseous fuel to others. Typically, the gaseous fuel is reduced to zero to a number of cylinders and increased to others, with the increase resulting in an equivalence ratio that will provide improved emissions and efficiency and the desired engine output.
    Type: Grant
    Filed: January 23, 2016
    Date of Patent: October 31, 2017
    Assignee: SOUTHWEST RESEARCH INSTITUTE
    Inventors: John C. Hedrick, David P. Branyon, Timothy J. Callahan, Jeremy D. Eubanks, Ryan C. Roecker, Garrett L. Anderson
  • Patent number: 9797349
    Abstract: The present disclosure relates to an apparatus and method for increasing the level of hydrogen produced in an exhaust gas recirculation pathway within an internal combustion engine. A hydrocarbon water gas shift reformer is positioned in series with a water gas shift reformer within the exhaust gas recirculation pathway to improve the yield of hydrogen and to improve the relative efficiency of both catalytic procedures.
    Type: Grant
    Filed: May 21, 2015
    Date of Patent: October 24, 2017
    Assignee: SOUTHWEST RESEARCH INSTITUTE
    Inventor: Cary A. Henry
  • Patent number: 9797334
    Abstract: Aspects and embodiments disclosed herein indicate a correlation exists between a specific gravity of combustible fuel and the occurrence of low-speed pre-ignition (LSPI) within engines. Thus techniques are disclosed herein for online measurement of the specific gravity of fuel within an engine, and allow for preventative measures to be executed to minimize or otherwise mitigate the incidence of LSPI when the calculated specific gravity of the fuel exceeds a predefined threshold. In an embodiment, the preventative measures may include, for example, altering or otherwise adjusting an engine map such that an injection timing scheme injects less poor-quality fuel into engine cylinders, thus advantageously preventing the engine from operating at full-power when conditions for LSPI are present.
    Type: Grant
    Filed: January 26, 2016
    Date of Patent: October 24, 2017
    Assignee: SOUTHWEST RESEARCH INSTITUTE
    Inventors: Garrett L. Anderson, Thomas E. Briggs, Jr.
  • Patent number: 9797287
    Abstract: The present disclosure is directed at a ruthenium based catalyst for NOx reduction. More specifically, ruthenium based catalysts are used for NOx reduction in an internal combustion engine to reduce NOX to nitrogen, at relatively high conversion and selectivity, using carbon monoxide and hydrogen as reductants. The ruthenium based catalyst has particular utility in exhaust gas recirculation such as in dedicated exhaust gas recirculation (D-EGR) systems.
    Type: Grant
    Filed: October 16, 2015
    Date of Patent: October 24, 2017
    Assignee: SOUTHWEST RESEARCH INSTITUTE
    Inventors: Gordon J. J. Bartley, Terrence F. Alger, II
  • Patent number: 9772777
    Abstract: A method and system is provided for improved access to flash memory devices. A system may include a control state module configured to receive memory access commands. The system may further include a plurality of operation sequencer modules configured to execute a pipeline schedule for the performance of the received memory access commands. The pipeline schedule may be configured to enable parallel execution of the memory access commands among a plurality of flash dies of the flash memory. Each of the operation sequencers is associated with one or more of the flash dies.
    Type: Grant
    Filed: April 27, 2015
    Date of Patent: September 26, 2017
    Assignee: SOUTHWEST RESEARCH INSTITUTE
    Inventors: Michael A. Koets, Larry T. McDaniel, III, Miles R. Darnell
  • Patent number: 9770533
    Abstract: The present disclosure is directed at a process to form bone grafting material. One may provide a porous collagen scaffold and insert the scaffold into a perfusion chamber of a perfusion flow system. This may then be followed by continuously providing a mineralization perfusion fluid flow through the scaffold at a flow rate to provide dynamic intrafibrillar mineralization of the scaffold and form a collagen/hydroxyapatite composite scaffold. One may optionally provide the scaffold with bone tissue forming cells and then deliver a perfusion fluid including oxygen and one or more nutrients through the collagen/hydroxyapatite composite scaffold and to the bone tissue forming cells at a flow rate such that the bone tissue forming cells remodel the collagen/hydroxyapatite composite scaffold and form a bone tissue extracellular matrix. The bone tissue extracellular matrix may then be decellularized to form an acellular bone repair scaffold.
    Type: Grant
    Filed: June 2, 2015
    Date of Patent: September 26, 2017
    Assignee: SOUTHWEST RESEARCH INSTITUTE
    Inventors: Jian Ling, Ben Antebi, Xingguo Cheng, Jeffrey N. Harris, Xiao-Dong Chen
  • Patent number: 9770415
    Abstract: An aligned polymer article including substrates, wherein the substrates are not covalently bonded to the aligned collagen and a method of forming such articles wherein substrates are mixed with a polymer in solution to form a polymer-substrate mixture. The mixture is placed in an electrochemical cell and a voltage is applied to the cell generating a pH gradient, wherein the polymer aligns in the cell and migrates to the isoelectric plane of the polymer solution.
    Type: Grant
    Filed: November 8, 2013
    Date of Patent: September 26, 2017
    Assignee: SOUTHWEST RESEARCH INSTITUTE
    Inventor: Xingguo Cheng
  • Patent number: 9752117
    Abstract: A hybrid tissue scaffold is provided which comprises a porous primary scaffold having a plurality of pores and a porous secondary scaffold having a plurality of pores, wherein the secondary scaffold resides in the pores of the primary scaffold to provide a hybrid scaffold. The pores of the porous primary scaffold may have a pore size in a range of 0.50 mm to 5.0 mm, and the pores of the porous secondary scaffold may have a pore size in a range of 50 ?m to 600 ?m. The primary scaffold may provide 5% to 30% of a volume of the hybrid scaffold.
    Type: Grant
    Filed: August 25, 2014
    Date of Patent: September 5, 2017
    Assignee: SOUTHWEST RESEARCH INSTITUTE
    Inventors: Jeffrey N. Harris, Jian Ling, Xingguo Cheng
  • Patent number: 9748640
    Abstract: An antenna element having a metal pattern with a three-dimensional profile. The metal pattern is at least one helix-loaded helix-loaded meandered loxodromic spiral. The profile is generally that of a domed top adjoined to a rotationally symmetric body such as a conical section. Typically, the metal antenna pattern is fabricated upon or otherwise supported by a dielectric medium.
    Type: Grant
    Filed: June 26, 2013
    Date of Patent: August 29, 2017
    Assignee: SOUTHWEST RESEARCH INSTITUTE
    Inventors: Brandon L. Nance, Brad D. Moore, James R. Noll
  • Patent number: 9714922
    Abstract: A probe for use in magnetostrictive testing of tubular structures. The probe has a handle and an outer tube, the latter having an expandable probe head for insertion into the tubular structure. A pair of magnetostrictive sensors is mounted in or on the probe head. A flexible bladder is located inside the outer tube in the area of the probe head, and communicates with a pressurizing cartridge in the probe handle via a bladder tube. The bladder is operable to expand, causing the probe head to expand, which moves the sensors toward the inner wall of the tubular structure. The probe is also equipped with a couplant injector that delivers coupling fluid to any gaps between the inner surface of the tubular structure and the outer surface of the probe.
    Type: Grant
    Filed: October 27, 2015
    Date of Patent: July 25, 2017
    Assignee: SOUTHWEST RESEARCH INSTITUTE
    Inventors: Sergey A. Vinogradov, Charles E. Duffer, Glenn M. Light
  • Patent number: 9701869
    Abstract: A method for depositing a coating includes creating a vacuum within an interior volume of a tubular structure, wherein the tubular structure also includes an internal surface. Gas is supplied to the interior volume of the tubular structure, wherein the gas includes a plasma precursor in the gas phase. The tubular structure is biased relative to ground. Plasma having a density is formed and cyclically positioned along the length of the tubular structure. Positive ions of the plasma precursor gas are generated and are deposited on the internal surface forming a coating on the internal surface, wherein the coating exhibits a water contact angle of greater than 120°.
    Type: Grant
    Filed: August 5, 2015
    Date of Patent: July 11, 2017
    Assignee: SOUTHWEST RESEARCH INSTITUTE
    Inventors: Michael A. Miller, Ronghua Wei, Gregory J. Hatton
  • Patent number: 9693967
    Abstract: This invention is directed to an apparatus and method for producing microparticles comprising pharmacologically active agents and biodegradable polymers. The apparatus includes a spinning disk containing a reservoir in the center thereof and a flat inclined surface. The apparatus optionally includes serrations and/or a flat surface beneath the periphery of the disk that is parallel to the rotational axis of the disk. The invention is also directed to a method for producing microparticles containing pharmacologically active agents, using the spinning disk apparatus. Formulations containing ophthalmically active agents are provided. Formulations exhibiting zero order release rates are also described.
    Type: Grant
    Filed: September 7, 2005
    Date of Patent: July 4, 2017
    Assignee: SOUTHWEST RESEARCH INSTITUTE
    Inventors: Joseph T. Persyn, Joseph A. McDonough, Neal K. Vail, Darren E. Barlow, Albert M. Zwiener, Eliot M. Slovin
  • Patent number: 9692529
    Abstract: A system, method and computer program product for signal emitter identification using Higher-Order Cumulants (HOC) is presented. At least one transient signal is received from an emitter when the emitter turns on. The at least one transient signal is processed using at least one Higher-Order Cumulant (HOC) to provide a set of entries for a vector table. A feature vector is derived from the vector table, the feature vector identifying the emitter. The feature vector is used to identify an emitter.
    Type: Grant
    Filed: August 16, 2016
    Date of Patent: June 27, 2017
    Assignee: SOUTHWEST RESEARCH INSTITUTE
    Inventors: Wayne D. Music, Ryan N. Wilson, Brian K. Anderson
  • Patent number: 9689776
    Abstract: An apparatus including a piston bore, exhibiting a longitudinal axis, and a piston, including a piston head and a piston shaft. The piston being axially displace-able within the piston bore along the longitudinal axis. The piston bore and a first surface of the piston head form a first working volume and displacement of the piston alters the first working volume. The apparatus also includes a first plurality of injectors coupled to the first working volume and a first common rail. The first plurality of injectors are configured to inject a hydraulic fluid from the common rail into the first working volume. The first common rail is configured to store the hydraulic fluid at an elevated pressure of 1,000 bar or greater. The apparatus includes a flow path between the first working volume and a reservoir for the hydraulic fluid.
    Type: Grant
    Filed: November 6, 2014
    Date of Patent: June 27, 2017
    Assignee: Southwest Research Institute
    Inventors: Riccardo Meldolesi, Peter Mark Lee