Aerospace and Mechanical Engineering

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  • Inventor(s):
    Eric Matlis, Thomas C. Corke, Sivaram Gogineni
    Patent Number:
    US 7275013 B2
    Description:

    Methods and systems are described for a system for obtaining information regarding a flow. These methods and systems comprise a signal generator configured to generate an alternating current signal at a carrier frequency and a transformer arranged to receive the generated signal, wherein the transformer and carrier frequency are selected so that the generated signal resonates at the carrier frequency. The alternating signal is then used to cause plasma to form across a gap between two electro…

    Date Issued:
    2007-09-25
    Resource Type
    Patent
  • Inventor(s):
    Mehul Patel, Thomas C. Corke
    Patent Number:
    US 7954768 B2
    Description:

    A method of controlling an aircraft, missile, munition or ground vehicle with plasma actuators, and more particularly of controlling fluid flow across their surfaces or other surfaces which would benefit from such a method, includes the design of an aerodynamic plasma actuator for the purpose of controlling airflow separation over a control surface of a aircraft, missile, or a ground vehicle, and a method of determining a modulation frequency for the plasma actuator for the purpose of fluid f…

    Date Issued:
    2011-06-07
    Resource Type
    Patent
  • Inventor(s):
    Linda Fehr, Steven B. Skaar, Guillermo Del Castillo
    Patent Number:
    US 6842692 B2
    Description:

    A wheelchair navigation system having motorized wheelchair which is powered by at least one onboard battery, and a battery charger. The navigation system also has a filter-based estimator with interface software running that is operated on an onboard laptop computer. Dual cameras, proximity sensors, microphones, and rotation sensors for the wheels are mounted to the wheelchair. Small markers are placed on the walls of a location or room. The navigation system uses the proximity sensors, rotat…

    Date Issued:
    2005-01-11
    Resource Type
    Patent
  • Inventor(s):
    Eric Matlis, Scott Morris, Thomas C. Corke, Joshua Cameron
    Patent Number:
    US 7908115 B2
    Description:

    Plasma sensors, systems and related methods are described. An example method for predicting an event includes providing a carrier signal across two electrodes and forming a plasma between the two electrodes. The example method also includes measuring a modulated signal from the plasma, manipulating the modulated signal to produce a value and comparing the value to a threshold. Finally, the example method includes determining the likelihood of the event based on the comparison.

    Date Issued:
    2011-03-15
    Resource Type
    Patent
  • Inventor(s):
    Mehul Patel, Thomas C. Corke
    Patent Number:
    US 7624941 B2
    Description:

    The present invention relates to a method of controlling an aircraft, missile, munition or ground vehicle with plasma actuators, and more particularly to controlling fluid flow across their surfaces or other surfaces, which would benefit from such a method. The method includes the design of an aerodynamic plasma actuator for the purpose of controlling airflow separation over a control surface of a aircraft, missile, or a ground vehicle, and more particularly to the method of determining a mod…

    Date Issued:
    2009-12-01
    Resource Type
    Patent
  • Inventor(s):
    Hsueh-Chia Chang, David T. Leighton
    Patent Number:
    US 6428754 B2
    Description:

    An exhaust gas treatment system and method for treating the exhaust gas of an internal combustion engine includes a catalytic converter and a catalytic preheater or igniter upstream of the catalytic converter. A bypass passage extends around the igniter such that during the ignition period about two-thirds of the exhaust gas is bypassed around the igniter and one-third passes through the igniter. The igniter raises the temperature of the exhaust gases passing therethrough to an adiabatic temp…

    Date Issued:
    2002-08-06
    Resource Type
    Patent
  • Inventor(s):
    Hsueh-Chia Chang, Shau-Chun Paul Wang, Dmitri Lastochkin, Leslie Yeo, Zachary Gagnon
    Patent Number:
    US 8267914 B1
    Description:

    The present invention provides an electrospray device using a high frequency alternating current (AC) above 10 kHz to generate fine micron sized drops. The apparatus generally functions by applying a high frequency alternating current electric field across one or more micro-needles and one or more conducting elements. The present invention may be used to generate aerosol drops for respiratory drug delivery or as a microencapsulation technique for the encapsulation of drugs, DNA, protein, oste…

    Date Issued:
    2012-09-18
    Resource Type
    Patent
  • Inventor(s):
    Tommie L. Wood, Thomas C. Corke, Martiqua Post
    Patent Number:
    US 8308112 B2
    Description:

    An aircraft includes a surface over which an airflow passes. A plasma actuator is configured to generate a plasma above the surface, the plasma coupling a directed momentum into the air surrounding the surface to reduce separation of the airflow from the surface. A method of reducing separation of an airflow from a surface of an aircraft includes generating a plasma in air surrounding the surface at a position where the airflow would separate from the surface in the absence of the plasma.

    Date Issued:
    2012-11-13
    Resource Type
    Patent
  • Inventor(s):
    Timothy C. Ovaert
    Patent Number:
    US 8109050 B2
    Description:

    A floor including a flooring plate and a plurality of spaced apart stiffening columns extending from an underside of the flooring plate. The columns remain substantially rigid up to a predetermined critical pressure and then buckle as the pressure increases. The columns are at least partially surrounded by a resilient underlayment. Deflection stops may extend from the flooring plate to prevent over-buckling and/or permanent deformation of the stiffening columns. In some examples, the deflecti…

    Date Issued:
    2012-02-07
    Resource Type
    Patent
  • Inventor(s):
    Hsueh-Chia Chang, Zilin Chen, Fu-Chih Hsu, David Battigelli
    Patent Number:
    US 7960180 B2
    Description:

    Methods and apparatus to capture and release microbe particles using amino-functionalized silica substrates are described. An example apparatus adapted to capture a microbe particle includes a silica substrate and a positively charged material to at least partially coat the silica substrate. The positive charged material includes an aminopropyl functional group.

    Date Issued:
    2011-06-14
    Resource Type
    Patent
  • Inventor(s):
    Zachary Gagnon, Hsueh-Chia Chang
    Patent Number:
    US 7744738 B2
    Description:

    The present invention provides a method and apparatus for use in rapid particle transportation, separation, focusing, characterization, and release. Dielectrophoresis and electro-osmotic driven fluid convection are used independently or in tandem as the driving forces for particle manipulation and on occasion characterization. Although dielectrophoresis has been acknowledged for decades as a powerful technique for particle manipulation and characterization, long processing times and measureme…

    Date Issued:
    2010-06-29
    Resource Type
    Patent
  • Inventor(s):
    Steven R. Schmid, Glen L. Niebur, Dale R. Sumner
    Patent Number:
    US 7674477 B2
    Description:

    The present invention provides a bone in-growth surface for implants which has a structure for delivering therapeutic agents to surrounding bone and tissue. The bone in-growth surface may comprise scaffolding and a controlled-permeability layer which contains the therapeutic agents in a variety of reservoirs. The porosity of the scaffolding may be controllable from zero porosity to essentially a fully porous material.

    Date Issued:
    2010-03-09
    Resource Type
    Patent