Patents by Inventor Stefan Hoffmann

Stefan Hoffmann 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).

  • Patent number: 7658076
    Abstract: The invention relates to an open-cooled component for a gas turbine having an outer wall which is subjected to hot gas and which at least partly defines a first cavity for a first medium and in which through-openings are arranged, which through-openings open into the cavity on the one side and into the hot-gas space on the other side, and having at least one second cavity for admixing a second medium, this second cavity being fluidically connected to the through-openings. In order to specify a component for a gas turbine with which flashback and spontaneous ignition during feeding of fuel into the cooling air can be reduced, it is proposed that the second cavity be formed by supply passages which are provided in the outer wall and are connected via transverse passages (4) to the through-openings designed as through-bores, so that the two media cannot be mixed until inside the through-bores.
    Type: Grant
    Filed: June 16, 2004
    Date of Patent: February 9, 2010
    Assignee: Siemens Aktiengesellschaft
    Inventor: Stefan Hoffmann
  • Publication number: 20090308363
    Abstract: An exhaust gas recirculation device for an internal combustion engine, a controllable exhaust gas recirculation valve for controlling an exhaust gas flow of the internal combustion engine, an exhaust gas cooler for cooling the exhaust gas flow, and a bypass device which has a bypass pipe arranged parallel with the exhaust gas cooler, by means of which pipe the exhaust gas flow can be fed at least partially past the exhaust gas cooler, and which has a controllable bypass switch which is arranged inside a valve housing of the exhaust gas recirculation valve. The invention also relates to a vehicle.
    Type: Application
    Filed: October 16, 2008
    Publication date: December 17, 2009
    Applicants: Hyundai Motor Company, Kia Motors Corporation, Hyundai Motor Europe Technical Center GmbH
    Inventor: Stefan HOFFMANN
  • Publication number: 20090185903
    Abstract: The invention relates to a turbine blade comprising a profiled vane around which working gas flows. The working gas cross-flows a front edge of the vane and flows away on a rear edge of the vane. The vane has a first and a second channel system for guiding two media separated from the turbine blade. Combustion taking place inside is reduced in a safe manner to maintain the service life of the turbine blade and to prevent damage in the gas turbine, such that a first outlet connected to the first channel system is arranged in the region of the rear edge for blowing out the first media into the working gas and a second outlet connected to the second channel system is arranged in the region of the rear edge for blowing out the second medium.
    Type: Application
    Filed: February 13, 2007
    Publication date: July 23, 2009
    Inventors: Alexander R. Beeck, Stefan Hoffmann
  • Publication number: 20090077975
    Abstract: The invention relates to a heat shield element for lining a combustion chamber wall, to a combustion chamber and to a gas turbine. The heat shield element comprises a hot side that can be exposed to a hot medium, a wall side opposite said hot side, and a peripheral side adjoining the hot side and the wall side and having a peripheral side surface. Relief slots are introduced into the material in an area of the heat shield element that is susceptible to material cracks induced by thermal stress, thereby limiting crack propagation.
    Type: Application
    Filed: April 18, 2006
    Publication date: March 26, 2009
    Inventors: Christian Scholz, Andreas Heilos, Stefan Hoffmann
  • Publication number: 20090081048
    Abstract: The invention relates to a blade for a turbine comprising a blade wall, a first channel for guiding a first medium and a second channel for guiding a second medium that can be supplied to the turbine blade separately from the first medium. In order to combine both media, which are supplied separately, into one mixture, a turbine blade has least one chamber which is arranged in the interior or in the blade wall and said chamber is connected to said channels via a respective connection line. In order to provide a particularly simple component that is economical to produce, the chamber and/or the outlet conduit are a least partially delimited and/or formed by an insert accommodated in the wall.
    Type: Application
    Filed: March 9, 2007
    Publication date: March 26, 2009
    Inventors: Alexander R. Beeck, Stefan Hoffmann
  • Publication number: 20080228490
    Abstract: A method and apparatus for creating links between a representation, (e.g. text data,) and a realization, (e.g. corresponding audio data,) is provided. According to the invention the realization is structured by combining a time-stamped version of the representation generated from the realization with structural information from the representation. Thereby so called hyper links between representation and realization are created. These hyper links are used for performing search operations in realization data equivalent to those which are possible in representation data, enabling an improved access to the realization (e.g. via audio databases).
    Type: Application
    Filed: May 23, 2008
    Publication date: September 18, 2008
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Uwe Fischer, Stefan Hoffmann, Werner Kriechbaum, Gerhard Stenzel
  • Patent number: 7412643
    Abstract: A method and apparatus for creating links between a representation, (e.g. text data,) and a realization, (e.g. corresponding audio data,) is provided. According to the invention the realization is structured by combining a time-stamped version of the representation generated from the realization with structural information from the representation. Thereby so called hyper links between representation and realization are created. These hyper links are used for performing search operations in realization data equivalent to those which are possible in representation data, enabling an improved access to the realization (e.g. via audio databases).
    Type: Grant
    Filed: November 23, 1999
    Date of Patent: August 12, 2008
    Assignee: International Business Machines Corporation
    Inventors: Uwe Fischer, Stefan Hoffmann, Werner Kriechbaum, Gerhard Stenzel
  • Patent number: 7291407
    Abstract: An article comprising a ceramic material having a ceramic matrix composite backing adapted for use in a gas turbine engine is provided. The article comprises a structural ceramic material having a hot side facing toward a high temperature environment and a cold side facing away from the high temperature environment; and a ceramic matrix composite composition having a strength greater than the strength of the ceramic material attached to the back of the cold side of the ceramic material, whereby crack initiation and propagation are inhibited by the ceramic matrix composition to a greater degree than by the ceramic material.
    Type: Grant
    Filed: September 4, 2003
    Date of Patent: November 6, 2007
    Assignee: Siemens Power Generation, Inc.
    Inventors: Gary B. Merrill, Michael A. Burke, Stefan Hoffmann, Jay A. Morrison, Marc Tertilt, Daniel Hofmann, Daniel G. Thompson
  • Publication number: 20070101722
    Abstract: The invention relates to an open-cooled component for a gas turbine having an outer wall (20) which is subjected to hot gas and which at least partly defines a first cavity (15) for a first medium and in which through-openings (3, 12) are arranged, which through-openings (3, 12) open into the cavity (15) on the one side and into the hot-gas space (21) on the other side, and having at least one second cavity for admixing a second medium, this second cavity being fluidically connected to the through-openings (3, 12). In order to specify a component for a gas turbine with which flashback and spontaneous ignition during feeding of fuel into the cooling air can be reduced, it is proposed that the second cavity be formed by supply passages (9, 13) which are provided in the outer wall (20) and are connected via transverse passages (4) to the through-openings (3, 12) designed as through-bores, so that the two media cannot be mixed until inside the through-bores.
    Type: Application
    Filed: June 16, 2004
    Publication date: May 10, 2007
    Inventor: Stefan Hoffmann
  • Patent number: 7117231
    Abstract: The present invention provides a method and system for computerized synchronization of an audio stream having a first synchronized textual representation usable for subtitling of the audio stream in the original language, with a second synchronized textual representation which can be used as an alternative subtitle including a transcription of the original language into another language. Time synchronous links can be built between the audio stream and, for instance, the textual representations of the words spoken in the audio stream. More particularly, the second representation can inherit the synchronization between the audio stream and the first representation using structure association information determined between the first and the second representation.
    Type: Grant
    Filed: November 27, 2001
    Date of Patent: October 3, 2006
    Assignee: International Business Machines Corporation
    Inventors: Uwe Fischer, Stefan Hoffmann, Werner Kriechbaum, Gerhard Stenzel
  • Patent number: 6810670
    Abstract: A catalytic section of a combustor is formed from a spaced tandem array of corrugated panels. The exterior top and bottom surfaces of the panels are coated with a catalyst and the space between panels defines a passage for a fuel-rich/air mixture. The interior of the corrugated panels define cooling air passages for maintaining the catalyst and substrate on which it is formed, at acceptable temperatures.
    Type: Grant
    Filed: September 17, 2002
    Date of Patent: November 2, 2004
    Assignee: Siemens Westinghouse Power Corporation
    Inventors: Gerald J. Bruck, William E. Kepes, Maria E. Stampahar, Thomas E. Lippert, Bernd Prade, Stefan Hoffmann
  • Patent number: 6799158
    Abstract: A characteristic identifier for digital data is generated. Thereby, the information contained in a digital data set is reduced such that the resulting identifier is made comparable to another identifier made in the same manner. The generated identifiers are used for detecting identical digital data or to determine inexact copies of digital data. In one embodiment of the invention, the digital data is a digital audio signal and the characteristic identifier is called an audio signature. The comparison of identical audio data according to the invention can be carried out without a person actually listening to the audio data. The present invention can be used to establish automated processes to find potential unauthorized copies of audio data, e.g., music recordings, and therefore enables a better enforcement of copyrights in the audio industry.
    Type: Grant
    Filed: December 18, 2000
    Date of Patent: September 28, 2004
    Assignee: International Business Machines Corporation
    Inventors: Uwe Fischer, Stefan Hoffmann, Werner Kriechbaum, Gerhard Stenzel
  • Patent number: 6792352
    Abstract: A vehicle data bus system includes locating means which comprise a locating computing unit and a locating sensor system which contains at least one GPS receiver with associated GPS antenna and gyro data acquisition means, and a data bus via which connects a plurality of bus users in data communication with one another. The locating means contain a locating module which is embodied as one of the bus users and is configured to receive at least wheel speed data and forward/backward direction of travel data via the data bus, to acquire at least vehicle position data, direction of travel angle data, travel speed data and altitude position data as well as to output this acquired data onto the data bus. For this purpose, the locating module contains the location computing unit, the GPS receiver and a gyroscope or means for the bus-end reception and evaluation of gyro data of a travel dynamics/traction control system.
    Type: Grant
    Filed: July 26, 2002
    Date of Patent: September 14, 2004
    Assignee: DaimlerChrysler AG
    Inventors: Stefan Hoffmann, Peter Hoyland, Reiner Knapp, Michael Maehner, Matthias Schlutter
  • Publication number: 20040110041
    Abstract: An article comprising a ceramic material having a ceramic matrix composite backing adapted for use in a gas turbine engine is provided. The article comprises a structural ceramic material having a hot side facing toward a high temperature environment and a cold side facing away from the high temperature environment; and a ceramic matrix composite composition having a strength greater than the strength of the ceramic material attached to the back of the cold side of the ceramic material, whereby crack initiation and propagation are inhibited by the ceramic matrix composition to a greater degree than by the ceramic material.
    Type: Application
    Filed: September 4, 2003
    Publication date: June 10, 2004
    Inventors: Gary B. Merrill, Michael A. Burke, Stefan Hoffmann, Jay A. Morrison, Marc Tertilt, Daniel Hofmann, Daniel G. Thompson
  • Publication number: 20040093202
    Abstract: Disclosed are a computerized method and system for the identification of identical or similar audio recordings or segments of audio recordings. Identity or similarity between a first audio segment of a first audio stream and at least a second audio segment of an at least second audio stream is determined by digitizing at least the first audio segment and the at least second audio segment of said audio streams, calculating characteristic signatures from at least one local feature of the first audio segment and the at least second audio segment, aligning the at least two characteristic signatures, comparing the at least two aligned characteristic signatures and calculating a distance between the aligned characteristic signatures and determining identity or similarity between the at least two audio segments based on the determined distance.
    Type: Application
    Filed: September 12, 2003
    Publication date: May 13, 2004
    Inventors: Uwe Fischer, Stefan Hoffmann, Werner Kriechbaum, Gerhard Stenzel
  • Publication number: 20040050054
    Abstract: A catalytic section of a combustor is formed from a spaced tandem array of corrugated panels. The exterior top and bottom surfaces of the panels are coated with a catalyst and the space between panels defines a passage for a fuel-rich/air mixture. The interior of the corrugated panels define cooling air passages for maintaining the catalyst and substrate on which it is formed, at acceptable temperatures.
    Type: Application
    Filed: September 17, 2002
    Publication date: March 18, 2004
    Applicant: Siemens Westinghouse Power Corporation
    Inventors: Gerald J. Bruck, William E. Kepes, Maria E. Stampahar, Thomas E. Lippert, Bernd Prade, Stefan Hoffmann
  • Patent number: 6425239
    Abstract: In a gas turbine having a plurality of hybrid burners, each of which has a pilot burner and a main burner, a different pilot fuel quantity is fed to the pilot burners as a function of the load on the gas turbine. This provides both stable operation of the gas turbine at low loads and effective suppression of combustion oscillations at high loads.
    Type: Grant
    Filed: February 28, 2001
    Date of Patent: July 30, 2002
    Assignee: Siemens Aktiengesellschaft
    Inventors: Stefan Hoffmann, Michael Kessler, Germann Scheer
  • Publication number: 20020087569
    Abstract: The present invention provides a method and system for computerized synchronization of an audio stream having a first synchronized textual representation usable for subtitling of the audio stream in the original language, with a second synchronized textual representation which can be used as an alternative subtitle including a transcription of the original language into another language. Time synchronous links can be built between the audio stream and, for instance, the textual representations of the words spoken in the audio stream. More particularly, the second representation can inherit the synchronization between the audio stream and the first representation using structure association information determined between the first and the second representation.
    Type: Application
    Filed: November 27, 2001
    Publication date: July 4, 2002
    Applicant: International Business Machines Corporation
    Inventors: Uwe Fischer, Stefan Hoffmann, Werner Kriechbaum, Gerhard Stenzel
  • Publication number: 20010020358
    Abstract: In a gas turbine having a plurality of hybrid burners, each of which has a pilot burner and a main burner, a different pilot fuel quantity is fed to the pilot burners as a function of the load on the gas turbine. This provides both stable operation of the gas turbine at low loads and effective suppression of combustion oscillations at high loads.
    Type: Application
    Filed: February 28, 2001
    Publication date: September 13, 2001
    Inventors: Stefan Hoffmann, Michael Kessler, Germann Scheer
  • Patent number: D521426
    Type: Grant
    Filed: April 13, 2005
    Date of Patent: May 23, 2006
    Assignee: Bayerische Motoren Werke Aktiengesellschaft
    Inventor: Matthias Stefan Hoffmann