Gas Analysis Patents (Class 73/23.2)
  • Patent number: 7870777
    Abstract: A gas sensor having an axis including a detecting element; a metal shell; an outer cylinder; and a plug member, as defined herein, and the gas sensor includes a first protective member that covers an air vent of the plug member so as to protect the filter member, the protective member having a ventilation portion having an opening smaller than an opening of the air vent and at least partially overlapping the air vent in the axial direction, and at least one of the outer cylinder and the plug member is provided with a locking portion that limits rotation of the protective member around the axis.
    Type: Grant
    Filed: April 22, 2008
    Date of Patent: January 18, 2011
    Assignee: NGK Spark Plug Co., Ltd.
    Inventors: Yoshiyasu Fujii, Takayoshi Atsumi, Hideya Inukai, Naoki Yamada, Takeo Mizui
  • Patent number: 7866220
    Abstract: The present invention of collecting a gaseous sample employs a sealable container, an inlet mounted at a part of the container, an outlet mounted at another part of the container, an atomizing electrode mounted in the container, a primary refrigerator mounted adjacent to the atomizing electrode, an opposite electrode mounted in the container, an acicular capture electrode mounted adjacent to the opposite electrode, and a secondary refrigerator mounted adjacent to the capture electrode. Charged microparticles are prepared by chilling the gaseous sample and producing condensate of the same. Such charged microparticles are collected by the capture electrode with static electricity, and they are condensed by chilling them. This method prevents the capture electrode from spreading solution thereon.
    Type: Grant
    Filed: November 13, 2009
    Date of Patent: January 11, 2011
    Assignee: Panasonic Corporation
    Inventors: Akio Oki, Hiroaki Oka
  • Patent number: 7856899
    Abstract: A method and apparatus are provided for maintaining pressure inside a closed chamber equal to the changing outside pressure, detecting leaks in the plumbing (i.e., air handling system) of a trace gas flux measurement system, and estimating the kinetic volume, e.g., of such a system.
    Type: Grant
    Filed: February 13, 2009
    Date of Patent: December 28, 2010
    Assignee: LI-COR, Inc.
    Inventors: Michael D. Furtaw, Dayle K. McDermitt, Liukang Xu
  • Patent number: 7856863
    Abstract: A hollow container defining a sample chamber is formed of at least two parts which fit together and have apertures therein. One of the parts is displaceable relative to the other part between a first relative disposition of the parts in which the apertures are open so as to provide a clear path for air to pass through the container and a second relative disposition of the parts in which the apertures are closed so that there is no path for air to pass through and a volume of air is trapped in the chamber. In one embodiment part is axially moveable relative to the other part. In another embodiment where the parts are tubular, one of the parts is rotatable relative to the other.
    Type: Grant
    Filed: June 13, 2006
    Date of Patent: December 28, 2010
    Assignee: Sensam Limited
    Inventors: Frank Kvasnik, Stephen Robert Smirk
  • Patent number: 7850908
    Abstract: A system and method for detecting the presence of submicron sized particles in a sample taken from the environment. More particularly, the system may be used to detect and identify bacteria by detecting the presence of bacterial pili which have been separated from bacterial cells in the sample. The system includes means for collecting a sample from the environment, separating pili from bacteria in the sample, and purifying and concentrating the submicron sized pili in the sample based on the size of the pili. The purified and concentrated pili are detected with an apparatus which includes an electrospray assembly having an electrospray capillary, a differential mobility analyzer which receives output from the capillary, and a condensation particle counting device for counting the number of pili sized particles that pass through the differential mobility analyzer.
    Type: Grant
    Filed: July 27, 2007
    Date of Patent: December 14, 2010
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventor: Charles H. Wick
  • Publication number: 20100310419
    Abstract: The invention relates to a fluid analysis device that comprises an analyzer and a system for supplying an instrumentation gas to said analyzer, characterized in that the supply system includes at least one mixer generating said instrumentation gas, and at least one purifier located downstream from said at least one mixer and upstream from said analyzer.
    Type: Application
    Filed: November 3, 2008
    Publication date: December 9, 2010
    Applicant: L"Air Liquide Societe Anonyme Pour L'Etude Exploitation Des Procedes Georges Claude
    Inventors: Valerie Bossoutrot, Joerg Koppel, Severine Lepic, Herve Paoli
  • Patent number: 7845209
    Abstract: An arrangement is disclosed for monitoring an installation for thermal loading, having at least one sensor and having evaluation electronics which are connected to the at least one sensor. An indicator substance is arranged at least one point or on at least one component in the installation. The amount of the indicator substances released into the environment is temperature-dependent. The indicator substance can be detected by the at least one sensor.
    Type: Grant
    Filed: September 28, 2005
    Date of Patent: December 7, 2010
    Assignee: ABB AG
    Inventors: Jens Köhler, Hans-Peter Merkel
  • Publication number: 20100298738
    Abstract: Methods for processing a vessel, for example to provide a gas barrier or lubricity, are disclosed. First and second PECVD or other vessel processing stations or devices and a vessel holder comprising a vessel port are provided. An opening of the vessel can be seated on the vessel port. The interior surface of the seated vessel can be processed via the vessel port by the first and second processing stations or devices. Vessel barrier, lubricity and hydrophobic coatings and coated vessels, for example syringes and medical sample collection tubes are disclosed. A vessel processing system and vessel inspection apparatus and methods are also disclosed.
    Type: Application
    Filed: May 12, 2010
    Publication date: November 25, 2010
    Inventors: John T. Felts, Thomas E. Fisk, Robert S. Abrams, John Ferguson, Jonathan R. Freedman, Robert J. Pangborn, Peter J. Sagona
  • Patent number: 7833483
    Abstract: A structure includes a substantially non-conductive frame having an exterior surface. The structure defines a plurality of passages that open to the exterior surface. Mesoporous material is disposed in the plurality of passages and is supported therein by the frame. In a method for making a mesoporous nanocrystalline titania hybrid material, a templating agent, an acid, and a titania precursor is mixed into a template liquid. A frame that defines a plurality of passages is placed into the template liquid. A solvent is evaporated from the template liquid, thereby forming a titania gel encapsulating the templating agent. The gel is heated to remove substantially the templating agent from the non-conductive frame and the titania, thereby leaving a mesoporous titania material.
    Type: Grant
    Filed: July 13, 2007
    Date of Patent: November 16, 2010
    Assignee: General Electric Company
    Inventors: Anthony Yu-Chung Ku, Sergio Paulo Martins Loureiro, James Anthony Ruud
  • Patent number: 7833481
    Abstract: A fully integrated portable screening system includes a main housing and a contact pad. The contact pad is removably positioned in the main housing and covered by at least one sample sheet. The contact pad is preferably constituted by a cylindrical baton which carries a roll of sample collection sheets. A test subject interacts with the contact pad, leaving a trace sample on the sample collection sheet. The contact pad is then placed within the main housing and the trace sample is exposed to a test medium designed to interact with a specific analyte of interest potentially present in the trace sample. After exposure to the test medium, the sample sheet is subjected to a testing mechanism which exposes any interaction between the test medium and the analyte of interest to produce a test result.
    Type: Grant
    Filed: September 22, 2006
    Date of Patent: November 16, 2010
    Assignee: RedXDefense, LLC
    Inventors: Khaled F. Eltomi, Jack Kotowicz, Pratheev Sabaratnam Sreetharan, Regina Elvira Dugan
  • Patent number: 7827849
    Abstract: A gas sensor (1) including a protector (100) for protecting a detection portion (11) of a sensor element (10). The protector (100) has an inner protector (120) and an outer protector (110). A diameter r of an exhaust hole (160) formed in the inner protector (120) and an axial distance h between a front end 10a of the sensor element 10 and the exhaust hole (160) satisfy a relation r?2h/15+?.
    Type: Grant
    Filed: October 30, 2007
    Date of Patent: November 9, 2010
    Assignee: NGK Spark Plug Co., Ltd.
    Inventors: Takashi Nakashima, Yuichi Yamada, Masashi Ando
  • Patent number: 7827847
    Abstract: This gas sensor is provided with: a detection element that measures a gas concentration of a detection target gas contained in an examination gas; a substrate having a heating element; and a supporting member that is fixed to the substrate, protrudes from the heating element, and supports the detection element.
    Type: Grant
    Filed: October 22, 2007
    Date of Patent: November 9, 2010
    Assignee: Honda Motor Co., Ltd
    Inventors: Hidetoshi Oishi, Takashi Sasaki, Akihiro Suzuki, Tsuyoshi Eguchi
  • Patent number: 7823438
    Abstract: A device is disclosed for sensing a fluid, such as in a ventilation duct. In at least one embodiment, the device includes a sensing element, a housing accommodating the sensing element, and a supply duct and a discharge duct, which ducts at one end commucicate with the housing and which ducts at the other end communicate with an object that is to be sensed. In at least one embodiment, the housing is formed with a first passage portion for the fluid that is to be sensed; that the sensing element is positioned in the first passage portion; and that the supply duct opens into said first passage portion and that the discharge duct is connected to a discharge opening formed in the first passage portion and positioned at a considerable peripheral distance from the mouth of said supply duct in the first passage portion, so that the fluid that is to be sensed is actively made to pass the sensing element.
    Type: Grant
    Filed: January 5, 2006
    Date of Patent: November 2, 2010
    Assignee: Calectro AB
    Inventor: Jörgen Sahibzada
  • Patent number: 7824618
    Abstract: Provided is a sensor structure comprising a heater and a temperature sensor at the center of a membrane having a well structure, allowing a temperature to be rapidly controlled with low power, and the object is analyzed using a conductivity change measured at two or more substrate temperatures with a pair of detecting electrode and a detecting layer implemented on the heater, wherein the sensing layer can include a conductive particle and a non-conductive organic composite.
    Type: Grant
    Filed: August 9, 2004
    Date of Patent: November 2, 2010
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Yong Shin Kim, Yun Tae Kim, Hae Sik Yang, Young Jun Kim, Seung Chul Ha, Yoon Seok Yang
  • Patent number: 7826986
    Abstract: A system and method for operating a mass flow controller is described. One embodiment validates the operation of a mass flow controller thermal sensor, including detecting zero drift and span drift in the sensor by comparing the thermal sensor output to a pressure sensor output. In one embodiment, each sensor provides a signal to a digital controller or other processing unit and the controller calculates the mass flow rates of a gas flowing through the unit as measured by the sensors. The mass flow rates may then be compared to determine if one of the thermal sensor is operating properly.
    Type: Grant
    Filed: September 26, 2008
    Date of Patent: November 2, 2010
    Assignee: Advanced Energy Industries, Inc.
    Inventor: R. Mike McDonald
  • Patent number: 7819946
    Abstract: A differential absorption spectrum for a reactive gas in a gas mixture can be generated for sample absorption data by subtracting background absorption data set from the sample absorption data. The background absorption data can be characteristic of absorption characteristics of the background composition in a laser light scan range that includes a target wavelength. The differential absorption spectrum can be converted to a measured concentration of the reactive gas using calibration data. A determination can be made whether the background composition has substantially changed relative to the background absorption data, and new background absorption data can be used if the background composition has substantially changed. Related systems, apparatus, methods, and/or articles are also described.
    Type: Grant
    Filed: April 19, 2010
    Date of Patent: October 26, 2010
    Assignee: SpectraSensors, Inc.
    Inventors: Xin Zhou, Xiang Liu, Alfred Feitisch, Gregory M. Sanger
  • Patent number: 7820949
    Abstract: A control apparatus for a gas sensor with a built-in heater is provided which can prevent damage to, deterioration of, and reduction in accuracy of detection of, a gas sensor. When an ignition switch is turned ON, supply of electricity to a heater 27 starts, and when the temperature in the vicinity of a gas sensor 15 (gas temperature of gas detection chamber 24) Ts becomes greater than a predetermined temperature #Ti at start, or when a predetermined electricity supply time after start of supply of electricity to the heater 27 has elapsed, the gas sensor 15 is started. The flow of off-gas is started simultaneously with starting of the gas sensor 15, or after starting. When the ignition switch is turned OFF, the flow of off gas is stopped, and the supply of electric power to the gas sensor 15 is stopped.
    Type: Grant
    Filed: May 12, 2003
    Date of Patent: October 26, 2010
    Assignee: Honda Motor Co., Ltd.
    Inventors: Takashi Sasaki, Hiroyuki Abe, Tsuyoshi Eguchi, Akihiro Suzuki
  • Patent number: 7820108
    Abstract: The present invention includes a method and apparatus for monitoring drug compliance by detecting markers, such as odors, upon exhalation by a patient after medication is taken, wherein such markers result either directly from the medication itself or from an additive combined with the medication. In the case of olfactory markers, the invention preferably utilizes electronic sensor technology, such as the commercial devices referred to as “artificial noses” or “electronic noses,” to non-invasively monitor compliance. The invention further includes a reporting system capable of tracking compliance (remote or proximate) and providing the necessary alerts.
    Type: Grant
    Filed: November 26, 2003
    Date of Patent: October 26, 2010
    Assignee: University of Florida Research Foundation, Inc.
    Inventors: Samsun Lampotang, Richard J. Melker, David N. Silverman
  • Patent number: 7818993
    Abstract: Single-walled carbon nanotubes (SWNTs) are decorated with metal nanoparticles to form high-performance flexible hydrogen sensors. The special process to form the high-performance flexible hydrogen sensors can combine a dry transfer printing technique and modification of SWNTs with palladium (Pd) nanoparticles to provide high-performance hydrogen sensors with excellent mechanical flexibility on plastic substrates. Two approaches can be used to decorate the SWNTs. One is physical deposition, such as electron beam evaporation (EBE) and the other is electrochemical deposition which can selectively grow palladium nanoparticles on the surface of the SWNTs, resulting in significantly decreasing the use of palladium. Preferably, the Pd nanoparticles are deposed on the SWNTs in a discontinuous arrangement so that the Pd nanoparticles are spaced away from each other to form individual discontinuous Pd nanoparticles rather a continuous Pd film.
    Type: Grant
    Filed: September 27, 2007
    Date of Patent: October 26, 2010
    Assignee: UChicago Argonne, LLC
    Inventors: Yugang Sun, Hsien-Hau Wang
  • Patent number: 7811520
    Abstract: A method for collecting and sensing a column of air in near real-time to detect one or more agents dispersed within the air column is described. The method includes passing the column of air through a port in a parafoil, the parafoil configured with a flow-through sensor suite located in the port and operable such that the column of air passes through the sensor suite, operating the sensor suite to test the column of air for the one or more agents, and receiving test results from the sensor suite.
    Type: Grant
    Filed: February 29, 2008
    Date of Patent: October 12, 2010
    Assignee: The Boeing Company
    Inventor: Roger D. Bernhardt
  • Publication number: 20100251803
    Abstract: Disclosed herein are detectable refrigerant compositions, comprising from about 0.001 to about 5 weight percent tracer compositions, which are useful to identify leaking in a vapor compression refrigeration and/or air conditioning system. The presence of the tracers make the refrigerant compositions detectable by chemo/electro-active array, corona discharge, heated diode, electrochemical, photoionization, infra red, ultrasonic and electron capture detectors.
    Type: Application
    Filed: June 22, 2010
    Publication date: October 7, 2010
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: DONALD BERNARD BIVENS, Thomas J. Leck, Mack McFarland, Barbara Haviland Minor, John Carl Steichen
  • Patent number: 7806968
    Abstract: A penetration and removal efficiency calibration unit for a volatile particle remover in a solid particle counting system provides an accurate and efficient approach to calibration. The calibration unit includes an aerosol inlet, a flow meter downstream of the aerosol inlet, and a mixer. The flow meter receives the aerosol flow from the aerosol inlet and provides an output flow to the mixer. The mixer receives the output flow from the flow meter and also has a dilution gas inlet. The mixer provides a mixer output flow for reception by the volatile particle remover or particle counter. A first flow controller controls flow into the dilution gas inlet. The calibration unit also includes a bypass inlet. A second flow controller controls flow into the bypass inlet, and a control loop controls the bypass flow such that the aerosol flow tracks a reference value.
    Type: Grant
    Filed: October 16, 2007
    Date of Patent: October 5, 2010
    Assignee: Horiba Ltd.
    Inventors: Qiang Wei, Montajir M D. Rahman, Michael Akard
  • Patent number: 7803635
    Abstract: A purge and trap concentrator system that includes a sparge vessel, and includes a variable gas flow valve for controlling the gas pressure in an analytic trap or the sparge vessel; a sensor that detects both a foaming sample state and a high liquid level in the sparge vessel, using one optical sensor; a control scheme that re-directs the purge gases to a second inlet of the sparge vessel during a foaming condition; a control scheme that uses a split flow to enhance the quantity of sample gases passed from an analytic trap; an electrically powered thermal energy source with a fan raising the sparge vessel temperature via thermal convection.
    Type: Grant
    Filed: February 27, 2008
    Date of Patent: September 28, 2010
    Assignee: EST Analytical, Inc
    Inventor: Douglas A. Meece
  • Patent number: 7801687
    Abstract: Methods for using modified single wall carbon nanotubes (“SWCNTs”) to detect presence and/or concentration of a gas component, such as a halogen (e.g., Cl2), hydrogen halides (e.g., HCl), a hydrocarbon (e.g., CnH2n+2), an alcohol, an aldehyde or a ketone, to which an unmodified SWCNT is substantially non-reactive. In a first embodiment, a connected network of SWCNTs is coated with a selected polymer, such as chlorosulfonated polyethylene, hydroxypropyl cellulose, polystyrene and/or polyvinylalcohol, and change in an electrical parameter or response value (e.g., conductance, current, voltage difference or resistance) of the coated versus uncoated SWCNT networks is analyzed. In a second embodiment, the network is doped with a transition element, such as Pd, Pt, Rh, Ir, Ru, Os and/or Au, and change in an electrical parameter value is again analyzed. The parameter change value depends monotonically, not necessarily linearly, upon concentration of the gas component.
    Type: Grant
    Filed: July 8, 2005
    Date of Patent: September 21, 2010
    Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration (NASA)
    Inventors: Jing Li, Meyya Meyyappan
  • Patent number: 7793534
    Abstract: A selective gas sensor is for determining the presence of a test gas, for example, helium includes an evacuated housing, sealed by a selectively gas-permeable membrane. The membrane is part of a sight glass, whereby the glass pane is provided with a hole, sealed by the membrane made from a silicon material. The frame of the membrane wall is connected to the housing by means of a high-vacuum soft-metal seal. The housing can also form one of the electrodes of the gas pressure sensor.
    Type: Grant
    Filed: November 29, 2005
    Date of Patent: September 14, 2010
    Assignee: Inficon GmbH
    Inventor: Werner Grosse Bley
  • Publication number: 20100218593
    Abstract: The invention relates to a semi-conductor transducer, and to the use thereof in an electron donor or electron acceptor space sensor. Said transducer consists of an insulating substrate on the surface of which two electrodes and a semiconductor sensitive element are provided. The sensitive element consists of a layer of a semiconductor molecular material M1 having a conductivity C1 and a layer of a semiconductor molecular material M2 having a conductivity C2 and a forbidden bandwidth Eg2<1 eV. The material layer M1 is in contact with the electrodes. The material layer M2 is deposited on the material layer M1 and is not in contact with the electrodes. The conductivities are such that C2/C1?1.
    Type: Application
    Filed: September 24, 2008
    Publication date: September 2, 2010
    Inventors: Marcel Bouvet, Vicente Parra
  • Patent number: 7779668
    Abstract: Disclosed herein are detectable refrigerant compositions, comprising from about 0.001 to about 5 weight percent tracer compositions, which are useful to identify leaking in a vapor compression refrigeration and/or air conditioning system. The presence of the tracers make the refrigerant compositions detectable by chemo/electro-active array, corona discharge, heated diode, electrochemical, photoionization, infrared, ultrasonic and electron capture detectors.
    Type: Grant
    Filed: March 30, 2009
    Date of Patent: August 24, 2010
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Thomas J. Leck, Mack McFarland, Barbara Haviland Minor, John Carl Steichen
  • Publication number: 20100209787
    Abstract: A gas detection system is configured to detect a preset gas in a predetermined space. The gas detection system includes a gas concentration detector constructed to detect a gas concentration of the preset gas, a recording assembly, a notification module, and a decision module. When the gas concentration detected by the gas concentration detector is higher than a preset first reference value, the decision module controls the notification module to give notice. When the detected gas concentration is higher than a preset second reference value but is lower than the preset first reference value, on the other hand, the decision module controls the notification module to give no notice but record a specific piece of information into the recording assembly. This arrangement of the gas detection system enables the user to readily detect deterioration of a device utilizing a fuel, for example, fuel cells.
    Type: Application
    Filed: October 2, 2008
    Publication date: August 19, 2010
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Shigeto Kajiwara, Katsuki Ishigaki
  • Patent number: 7768414
    Abstract: A medical gas alarm system for use in a healthcare facility having a medical gas system and having a network of computer devices is provided. The alarm system includes at least one area alarm controller adapted to receive a first signal indicative of a condition of a first portion of the medical gas system. The area alarm controller is adapted to communicate with the network. The alarm system also includes at least one master alarm controller adapted to receive a second signal indicative of a condition of a second portion of the medical gas system. The master alarm controller is adapted to communicate with the network. The area alarm controller is adapted to communicate with the master alarm controller through the network.
    Type: Grant
    Filed: November 20, 2006
    Date of Patent: August 3, 2010
    Assignee: Beacon Medical Products LLC
    Inventors: Joseph H. Abel, William C. Bohlinger, Stanton H. Breitlow, Edward W. Catton, Thomas J. Dubisar, James P. Hentges, Richard E. Hoffman, William J. Kaht, Nick D. LaBare, Robert O. Moran, Thomas R. Pfingsten, Phillip B. Plyler, John M. Sharer, John B. Wilker, Sr., Dale T. Wolfe
  • Publication number: 20100186480
    Abstract: A diagnostic device for use in the detection of a fault in an electrical apparatus, especially transformers that have electrical windings immersed in electrical insulating oil with a headspace above the oil. The device comprises a housing defining a chamber with a mouth adapted to receive a pressure relief valve on the oil tank. The device creates a fluid tight seal around the pressure relief valve and operates the pressure relief valve to extract a gas sample from the headspace into the chamber. The device may include a gas analyzer for analyzing the gas sample for the presence of acetylene, which is indicative of a fault in the apparatus.
    Type: Application
    Filed: February 8, 2008
    Publication date: July 29, 2010
    Applicant: Kelvatek Limited
    Inventors: John Cunningham, Colin McIlroy, Robert Watson, Kenneth Richey, Alan Mills
  • Patent number: 7759123
    Abstract: A method and apparatus for removing concentrated spots of collected particulates from an impact collection surface, and transferring those particulates into a container suitable for preparing a liquid sample. A jet of fluid can be utilized to remove and transfer the particulates. If a liquid jet is employed, care is taken to minimize the quantity of liquid to avoid unnecessarily diluting the sample. A mechanical scraper can alternatively be employed to remove and transfer the particulates into the container. The scraper can be rinsed with liquid or vibrated to remove the particulates. Alternatively, the portion of the surface containing a specific spot of particulates can be removed and placed into a container.
    Type: Grant
    Filed: March 21, 2006
    Date of Patent: July 20, 2010
    Assignee: MesoSystems Technology, Inc.
    Inventors: Charles J. Call, Patrick T. Call, Vanessa M. Kenning, Eric Hanczyc, Andrew Kamholz
  • Patent number: 7752885
    Abstract: A gas specimen mixture analysis system includes at least one sensor for measuring the concentrations of inert components in the gas specimen mixture, a pressure sensor for measuring the pressure of the gas specimen mixture, and a temperature sensor for measuring the temperature of the gas specimen mixture. A subsystem measures the speed of sound in the gas specimen mixture, and a processing subsystem, responsive to the at least one inert component sensor, the pressure sensor, the temperature sensor, and the subsystem for measuring the speed of sound, is configured to generate a number of sample gas mixtures with varying percentages of hydrocarbon gases, each including the measured inert component concentrations.
    Type: Grant
    Filed: December 7, 2006
    Date of Patent: July 13, 2010
    Assignee: General Electric Company
    Inventor: Yufeng Huang
  • Patent number: 7752884
    Abstract: A method of analyzing a gas specimen mixture includes measuring the concentrations of inert components in the gas specimen mixture and the pressure and temperature of the gas specimen mixture. A number of sample gas mixtures are generated with varying percentages of hydrocarbon gases, each including the measured inert component concentrations. For each generated sample gas mixture, the method includes calculating the speed of sound therein based on the measured pressure and temperature and the particular percentages of hydrocarbon gases therein, measuring the speed of sound in the gas specimen mixture, and iteratively comparing the measured speed of sound with the calculated speed of sound in different sample gas mixtures until convergence for a particular sample gas mixture. The molecular weight of the particular sample gas mixture is calculated, and set the molecular weight of the gas specimen mixture to the calculated molecular weight.
    Type: Grant
    Filed: December 7, 2006
    Date of Patent: July 13, 2010
    Assignee: General Electric Company
    Inventor: Yufeng Huang
  • Publication number: 20100173228
    Abstract: The present invention relates to nanostructured composites comprising a nanotube network which is at least partially embedded within a carbon layer. The present invention particularly relates to conducting nanostructured composites for use in the fields of energy conversion, energy storage and also the biomedical field. The present invention also relates to a process via CVD of carbon onto a catalyst layer on a substrate. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present invention.
    Type: Application
    Filed: December 14, 2007
    Publication date: July 8, 2010
    Applicant: University of Wollongong
    Inventors: Gordon George Wallace, Ju Chen, Andrew Ian Minett
  • Patent number: 7744818
    Abstract: Selecting a stationary phase for a fluid analyzer using certain criteria to determine an appropriate material for use in, for instance, a micro fluid analyzer. High absorption of an analyte or sample, low water sorbency and high porosity or permeability of the material may be sought. A selected material may incorporate a toughening agent using a neutral leaving group. A selected material may have a capping agent to promote hydrophobicity. A selected material may be a hydrophobic polymer. The selection of a stationary phase may involve molecular modeling.
    Type: Grant
    Filed: February 27, 2006
    Date of Patent: June 29, 2010
    Assignee: Honeywell International Inc.
    Inventors: Nancy E. Iwamoto, Teresa A. Ramos, Robert R. Roth, Ulrich Bonne
  • Patent number: 7739924
    Abstract: A flow head for a gas sensor having a sensing element is provided. The flow head includes a body at least partially defining a cavity in thermal communication with the sensing element. The body includes an inlet port located within an annular surface of the body and an outlet port located within the annular surface of the body. The body also includes an inlet passage offset from and parallel to the cavity, wherein the inlet passage configures the inlet port and the cavity to be in fluid communication with one another. The body further includes an outlet passage offset from and parallel to the cavity, wherein the outlet passage configures the outlet port and the cavity to be in fluid communication with one another.
    Type: Grant
    Filed: February 27, 2008
    Date of Patent: June 22, 2010
    Assignee: Caterpillar Inc.
    Inventors: Anthoniraj Lourdhusamy, Balakrishnan G. Nair
  • Publication number: 20100140477
    Abstract: A method for determining at least one gas variable by way of a gas sensor system, and at least one system variable of that gas sensor system, in which:—the gas variable is measured at least twice, the at least two measurements differing because two different values are set for a parameter of the gas sensor system, and—based on the at least two measurements, the at least one system variable and the at least one gas variable are determined.
    Type: Application
    Filed: May 9, 2008
    Publication date: June 10, 2010
    Inventors: Alexander Graf, Holger Mielenz
  • Patent number: 7730765
    Abstract: In certain embodiments, an apparatus includes an oxygen depletion sensor (ODS) includes a thermocouple, a first nozzle configured to direct heat from combustion of a first gas, liquid, or combination thereof to the thermocouple, a second nozzle configured to direct heat from combustion of a second gas, liquid, or combination thereof to the thermocouple, and a first igniter.
    Type: Grant
    Filed: September 23, 2008
    Date of Patent: June 8, 2010
    Inventor: David Deng
  • Patent number: 7726175
    Abstract: An apparatus and method for sensing chemical and/or biological analytes includes a deflectable arm of a microcantilever at least partially embedded within a sensing element. A gaseous or liquid medium which may include the analyte being detected is introduced to the sensing element. The sensing element undergoes volumetric expansion or contraction in the presence of the analyte sought to be detected, typically by adsorbing the analyte. The volumetric change of the sensing element causes the deflectable arm to deflect. The deflectable arm includes at least one measurable physical property which changes when the arm deflects. Detecting means are provided to measure the change in the physical property to determine the presence and amount of analyte present. An array of microcantilevers in which each microcantilever is dedicated to detecting a particular analyte which may be included in the medium, is also provided.
    Type: Grant
    Filed: June 11, 2008
    Date of Patent: June 1, 2010
    Assignee: Arizona Board of Regents, A Body Corporate of the State of Arizona, acting for Northern Arizona University
    Inventors: Timothy L. Porter, Michael P. Eastman
  • Patent number: 7716965
    Abstract: An electrochemical suspended element-based sensor system includes a solution cell for holding an electrolyte comprising solution including at least one electrochemically reducible or oxidizable species. A working electrode (WE), reference electrode (RE) and a counter electrode (CE) are disposed in the solution. The CE includes an asymmetric suspended element, wherein one side of the suspended element includes a metal or a highly doped semiconductor surface. The suspended element bends when current associated with reduction or oxidation of the electrochemically reducible or oxidizable species at the WE passes through the suspended element. At least one measurement system measures the bending of the suspended element or a parameter which is a function of the bending.
    Type: Grant
    Filed: October 27, 2006
    Date of Patent: May 18, 2010
    Assignee: UT-Battelle, LLC
    Inventors: Thomas G. Thundat, Gilbert M. Brown
  • Patent number: 7719004
    Abstract: The invention concerns a sensor with silicon-containing components from whose sensitive detection element electrical signals relevant to a present analyte can be read out by means of a silicon semiconductor system. The invention is characterized in that the silicon-containing components are covered with a layer made of hydrophobic material in order to prevent unwanted signals caused by moisture.
    Type: Grant
    Filed: February 1, 2005
    Date of Patent: May 18, 2010
    Assignee: Micronas GmbH
    Inventors: Markus Burgmair, Ignaz Eisele, Thorsten Knittel
  • Patent number: 7710284
    Abstract: A garage monitoring system is provided that determines if the garage door is opened or closed, and will not issue a move door command if the garage door is already opened and it will not issue a move door command if smoke is detected first. The system's sequence of operation is can thus be described as follows: a. If CO is detected first, high concentration, sound alarm and open door immediately. b. If CO is detected first, low concentration, sound alarm and wait a time period to see if smoke alarm activates. If smoke alarm does not activate, open garage door, otherwise do not change the position of the garage door. c. If smoke is detected first, sound alarm and do not change the position of the garage door.
    Type: Grant
    Filed: February 26, 2007
    Date of Patent: May 4, 2010
    Inventors: Thomas A. Dzurko, Edward Cogan, James Heidenreich
  • Patent number: 7709264
    Abstract: A method and system for detecting tobacco-specific nitrosamines. The method includes exposing at least one microcantilever beam to a medium, which may contain tobacco-specific nitrosamines, and measuring a deflection of the microcantilever beam, wherein the deflection indicates a presence of tobacco-specific nitrosamines in the medium. The at least one microcantilever beam can include a silicon base layer and a gold-coated receptor layer with a plurality of thiol molecules having a sulfur head and carboxyl-terminated group. The at least one microcantilever beam can include a silicon base layer and a metal or metal oxide coated receptor layer. Alternatively, the microcantilever beam can be formed by co-absorbing tobacco-specific nitrosamines and silane molecules on a silicon microcantilever surface, wherein the template molecules of tobacco-specific nitrosamines physically co-adsorb between the silane molecules.
    Type: Grant
    Filed: September 18, 2007
    Date of Patent: May 4, 2010
    Assignee: Philip Morris USA Inc.
    Inventors: Seetharama C. Deevi, Fang Tian
  • Patent number: 7704301
    Abstract: A differential absorption spectrum for a reactive gas in a gas mixture can be generated for sample absorption data by subtracting background absorption data set from the sample absorption data. The background absorption data can be characteristic of absorption characteristics of the background composition in a laser light scan range that includes a target wavelength. The differential absorption spectrum can be converted to a measured concentration of the reactive gas using calibration data. A determination can be made whether the background composition has substantially changed relative to the background absorption data, and new background absorption data can be used if the background composition has substantially changed. Related systems, apparatus, methods, and/or articles are also described.
    Type: Grant
    Filed: April 11, 2008
    Date of Patent: April 27, 2010
    Assignee: SpectraSensors, Inc.
    Inventors: Xin Zhou, Xiang Liu, Alfred Feitisch, Gregory M. Sanger
  • Publication number: 20100095740
    Abstract: A method for determining a physical property of an object in a multi-path clutter environment comprises transmitting an RF interrogation signal to a wireless sensor physically coupled to the object or the fluid in the multi-path clutter environment, wherein the wireless sensor is operable to receive the RF interrogation signal, produce a reference signal and a measurement signal, and transmit the reference signal and the measurement signal in the multi-path clutter environment. The reference signal and measurement signal are delayed by the wireless sensor by an amount of time that may be a function of the unknown physical property. The method also comprises receiving the transmitted reference signal and the transmitted measurement signal and comparing them in the time domain in order to determine the unknown physical property of the object or the fluid.
    Type: Application
    Filed: August 7, 2009
    Publication date: April 22, 2010
    Applicants: THE OHIO STATE UNIVERSITY RESEARCH FOUNDATION, SYNTONICS LLC
    Inventors: Eric K. Walton, Yakup Bayram, Orbay Tuncay, Bruce Montgomery, Gary W. Bruce, Douglas E. Crowe, Steven E. Gemeny
  • Publication number: 20100092808
    Abstract: Modified graphite particles obtained from graphite or based on graphite, the said particles having impurities in their internal structure and having on the surface a low, even nil, rate of an impurity or several impurities. In addition, these particles have at least one of the following characteristics: a tab density between 0.3 and 1.5 g/cc; a potatolike shape; and a granulometric dispersion such that the D90/D10 ratio varies between 2 and 5 and the particles have a size between 1 and 50 ?m. These particles can be used for fuel cells, electrochemical generators, or as moisture absorbers and/or oxygen absorbers and they have important electrochemical properties. The electrochemical cells and batteries thus obtained are stable and safe.
    Type: Application
    Filed: October 2, 2009
    Publication date: April 15, 2010
    Applicant: Hydro Quebec
    Inventors: Abdelbast Guerfi, Fernand Brochu, Kimio Kinoshita, Karim Zaghib
  • Publication number: 20100094565
    Abstract: A method and system for detecting, quantifying or characterizing emitting sources. According to an embodiment, an emission source is located by monitoring an area with one or more sensors, determining a plume, generating one or more candidates for the emission source, and using the plume to derive one or more characteristics associated with the emission source, and then locating the emission source based on agreement or convergence of the one or more characteristics.
    Type: Application
    Filed: January 16, 2008
    Publication date: April 15, 2010
    Inventors: Dennis Scott Prince, Terry Dan Butler
  • Patent number: 7694547
    Abstract: Described herein is a composite exhibiting a change in electrical resistance proportional to the concentration of a reducing gas present in a gas mixture, detector and sensor devices comprising the composite, a method for making the composite and for making devices comprising the composite, and a process for detecting and measuring a reducing gas in an atmosphere. In particular, the reducing gas may be carbon monoxide and the composite may comprise rutile-phase TiO2 particles and platinum nanoclusters. The composite, upon exposure to a gas mixture containing CO in concentrations of up to 10,000 ppm, exhibits an electrical resistance proportional to the concentration of the CO present. The composite is useful for making sensitive, low drift, fast recovering detectors and sensors, and for measuring CO concentrations in a gas mixture present at levels from sub-ppm up to 10,000 ppm. The composites, and devices made from the composites, are stable and operable in a temperature range of from about 450° C.
    Type: Grant
    Filed: February 29, 2008
    Date of Patent: April 13, 2010
    Assignee: The Ohio State University Research Foundation
    Inventors: Prabir K. Dutta, Ramamoorthy Ramasamy, Xiaogan Li, Sheikh A. Akbar
  • Patent number: 7687030
    Abstract: A hydrogen gas visualization device comprises a hydrogen sensor having a thin film layer formed on the surface of a substrate and a catalyst layer formed on the surface of the thin film layer which, when contacted by hydrogen gas contained in an atmosphere, hydrogenates the thin film layer and thereby changes the optical reflectance of the thin film layer, and one or more sensor faces provided with the hydrogen sensor. The hydrogen gas visualization device visualizes, on the sensor faces, the distribution of hydrogen gas contained in the atmosphere contacting the hydrogen sensor and thereby visualizes the existence and flow of the hydrogen gas.
    Type: Grant
    Filed: October 16, 2006
    Date of Patent: March 30, 2010
    Assignee: Kabushiki Kaisha ATSUMITEC
    Inventors: Naoki Uchiyama, Hiroyuki Matsumoto
  • Patent number: RE41591
    Abstract: A system and method for detecting contaminants in or on objects, having a movably mounted container for holding objects and having a plurality of perforations and an entrance opening through which objects may be placed into the container. A housing encloses the container and forms a barrier to ambient air. There is a sealable opening for inserting and removing objects from the container. A drive assembly moves the container within the housing to move objects therein for emitting particles which are in or on such object. There is an air stream for moving air through the housing and container to entrain any emitted particles into the air stream and a sensor for sensing contaminants in the air stream and providing a signal when a contaminant is sensed. The container can be a rotatable cage or a vibrating box. In the method, there is a chamber provided which may be sealed with respect to ambient air to create an enclosed atmosphere.
    Type: Grant
    Filed: May 13, 2008
    Date of Patent: August 31, 2010
    Assignee: Lockheed Martin Corporation
    Inventors: Allen M. Jones, Clifford A. Megerle, John T. Swider, Barry Wake, Michael W. Finney, Michael A. Heaton, Christopher J. Tatar