Patents Assigned to Elster GmbH
  • Patent number: 10545127
    Abstract: A sensor for determining an air ratio of a fuel gas/air mixture, wherein a housing is formed, which delimitates a measuring space. The housing has on one side a diffusion passage for coupling with a fuel gas/air mixture flow, wherein the diffusion passage is formed by a gas-permeable separating agent. An electrically operated excitation element is arranged for energy supply into the measuring space in order to induce a chemical reaction of a fuel gas/air mixture in the measuring space. At least one optical detection device is directed into the measuring space with its detection area, wherein the at least one optical detection device detects the intensity of radiation from the reaction position in at least a first wavelength range and produces a signal being allocated to the detected intensity, from which the air ratio is inferable.
    Type: Grant
    Filed: February 9, 2017
    Date of Patent: January 28, 2020
    Assignee: Elster GMBH
    Inventors: Bernardus Johannes Maria Leerkotte, Christian Franz Hugo Schafer
  • Patent number: 9080923
    Abstract: Method for checking the leakproffness of safety valves. Method for testing the leadkproofness of two controllable valves (V1, V2), wherein the vales are arranged at opposite ends of a test volume (10). An inlet pressure pe is present upstream of the test volume, in front of valve V1, and an outlet pressure pa is present downstream of the test volume, behind the valve V2. A control device controls the valves to open and close, and the control device is coupled to at least two pressure switches (26, 27) which are both operatively connected to the test volume (10) in order to monitor the pressure. The first pressure switch is set to a first triggering threshold d1, wherein d1=pe/x, where x>3. The second pressure switch is set to a second triggering threshold d2, wherein d2=pe(1?1/x). A valve is controlled in order to open the valve for a period of time tL1 and then to close said valve. The process then waits for a measurement period tM1 and a first pressure switch is checked.
    Type: Grant
    Filed: June 26, 2012
    Date of Patent: July 14, 2015
    Assignee: Elster GmbH
    Inventors: Aloys Quatmann, Ulrich Engelmann, Oliver Borgmann
  • Publication number: 20140174158
    Abstract: Method for checking the leakproffness of safety valves. Method for testing the leadkproofness of two controllable valves (V1, V2), wherein the vales are arranged at opposite ends of a test volume (10). An inlet pressure pe is present upstream of the test volume, in front of valve V1, and an outlet pressure pa is present downstream of the test volume, behind the valve V2. A control device controls the valves to open and close, and the control device is coupled to at least two pressure switches (26, 27) which are both operatively connected to the test volume (10) in order to monitor the pressure. The first pressure switch is set to a first triggering threshold d1, wherein d1=pe/x, where x>3. The second pressure switch is set to a second triggering threshold d2, wherein d2=pe(1?1/x). A valve is controlled in order to open the valve for a period of time tL1 and then to close said valve. The process then waits for a measurement period tM1 and a first pressure switch is checked.
    Type: Application
    Filed: June 26, 2012
    Publication date: June 26, 2014
    Applicant: Elster GmbH
    Inventors: Aloys Quatmann, Ulrich Engelmann, Oliver Borgmann
  • Patent number: 8283635
    Abstract: The invention relates to a method for determining the gas quality of a sample gas mixed at least in part with biogas, having the main components CH4, CO2, N2, O2, H2, proceeding from a spectrum of the sample gas determined by means of infrared-spectroscopy measurement methods, under operating conditions, from which the mole ratios of the sample gas are determined by means of correlative methods, and converted to characteristic variables of the gas quality.
    Type: Grant
    Filed: June 18, 2009
    Date of Patent: October 9, 2012
    Assignee: Elster GmbH
    Inventor: Joachim Kastner
  • Patent number: 8062027
    Abstract: The industrial burner comprising a mixing chamber, which is provided with at least one opening into a furnace room, through which opening at least a partially-mixed fuel flow from the mixing chamber dispenses into the furnace room during operation. A combustion air supplier, through which the mixing chamber is supplied with combustion air during operation, and a fuel supplier, with which fuel is introduced into the mixing chamber, are provided. The fuel supplier can switch between a first and a second operation state, wherein in the first operation state, fuel is introduced into the mixing chamber at a first angle, and in the second operation state, fuel is introduced into the mixing chamber at substantially the same axial position with respect to the opening as in the first operation state and at a second angle with respect to the axial direction of the mixing chamber.
    Type: Grant
    Filed: August 9, 2006
    Date of Patent: November 22, 2011
    Assignee: Elster GmbH
    Inventors: Horst Graf von Schweinitz, Andreas Munko
  • Patent number: 8062029
    Abstract: The invention relates to a radiant-heating device for heating an industrial furnace using radiated heat. A first burner unit (1) comprises a first burner (2), which heats an air mixture by burning a fuel (6), a first air supplier (60), via which the first burner (2) is supplied with fresh air, and a first elongated radiant-heating pipe (20), which includes a rearward end (20a) connected with the first burner (2) and a forward end (20b) spaced from the rearward end (20a) and in which the hot exhaust gas generated by the first burner (2) flows from the rearward end (20a) to the forward end (20b) of the first radiant-heating pipe (20) and supplies heat energy along this path to the pipe wall of the first radiant-heating pipe (20). A second burner unit (1?) is constructed like the first burner unit (1).
    Type: Grant
    Filed: February 19, 2009
    Date of Patent: November 22, 2011
    Assignees: Elster GmbH, LOI Thermprocess GmbH
    Inventors: Horst Graf v. Schweinitz, Wolfram Schupe
  • Publication number: 20110215247
    Abstract: The invention relates to a method for determining the gas quality of a sample gas mixed at least in part with biogas, having the main components CH4, CO2, N2, O2, H2, proceeding from a spectrum of the sample gas determined by means of infrared-spectroscopy measurement methods, under operating conditions, from which the mole ratios of the sample gas are determined by means of correlative methods, and converted to characteristic variables of the gas quality.
    Type: Application
    Filed: June 18, 2009
    Publication date: September 8, 2011
    Applicant: Elster GmbH
    Inventor: Joachim Kastner
  • Publication number: 20110134430
    Abstract: The invention relates to a method for determining the gas quality of a sample gas having the main components H2, CO, CO2, N2, CH4, proceeding from a spectrum of the sample gas determined by means of infrared-spectroscopy measurement methods, from which the mole fractions of the sample gas are determined by means of correlative methods, and converted into characteristic variables of the gas quality.
    Type: Application
    Filed: August 13, 2009
    Publication date: June 9, 2011
    Applicant: Elster GmbH
    Inventor: Joachim Kastner
  • Publication number: 20100307613
    Abstract: The invention relates to a device for blocking and releasing a fluid flow having a fluid inlet and a fluid outlet. A main opening is disposed between the inlet and the outlet and associated with a main blocking element that can seal off the main opening. An actuation device can move the main blocking element from the open position to the closed position, and the main blocking element is disposed in the closed position such that an increased fluid pressure at the fluid inlet relative to the fluid outlet brings about a press force holding the main blocking element in the closed position. A fluid overflow path is provided between the fluid inlet and the fluid outlet that can be sealed off by the actuation device. The main blocking element can be released by the actuation device and the fluid overflow path can be opened by the actuation device.
    Type: Application
    Filed: November 17, 2008
    Publication date: December 9, 2010
    Applicant: ELSTER GMBH
    Inventors: Guido Temme, August Wallmeyer
  • Patent number: 7647826
    Abstract: A method for measuring operational density and/or operational sound velocity in a gaseous medium uses a sound transducer that is capable of vibrating, which is disposed in a housing in such a manner that chambers having the same volume are formed on both sides of the sound transducer, which are filled by the gaseous medium. The chambers are connected with one another by way of an open channel having defined dimensions. Using an exciter vibration applied to the sound transducer, the impedance of the sound transducer, which is influenced by the density of the gaseous medium, is determined within a frequency range that can be established, as a function of the exciter frequency. From this, the operational density and/or the operational sound velocity of the gaseous medium are determined using a plurality of characteristic frequencies of the sound transducer vibrating in the gaseous medium.
    Type: Grant
    Filed: March 21, 2007
    Date of Patent: January 19, 2010
    Assignee: Elster GmbH
    Inventor: Ulrich Ewerlin
  • Patent number: D682794
    Type: Grant
    Filed: October 10, 2011
    Date of Patent: May 21, 2013
    Assignee: ELSTER, GmbH
    Inventors: Rudi Biller, Jurgen Konermann
  • Patent number: D693311
    Type: Grant
    Filed: October 10, 2011
    Date of Patent: November 12, 2013
    Assignee: Elster GmbH
    Inventors: Rudi Biller, Jurgen Konermann