Patents by Inventor Jan Pettersson
Jan Pettersson 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).
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Patent number: 11204166Abstract: A burner of a turbomachine, particularly a gas turbine engine, has at least one burner section having an annular wall surrounding a respective section of a burner interior, the annular wall including: an annular inner surface delimiting the burner interior, and a plurality of dampening cavities for the dampening of thermo-acoustic vibrations in the burner interior, each dampening cavity being connected to the annular inner surface through at least a dampening hole. A method of manufacturing such a burner includes additive manufacturing of the annular wall as an integrally formed component, or additive manufacturing of the upstream burner section, wherein the intermediate burner section and the downstream burner section as integrally formed component.Type: GrantFiled: June 29, 2018Date of Patent: December 21, 2021Assignee: Siemens Energy Global GmbH & Co. KGInventors: Jan-Erik Lundgren, Jan Pettersson
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Patent number: 10788211Abstract: A combustion chamber for a gas turbine engine includes: an inner wall delimiting an inner volume of the combustion chamber, through which combustion gas flow from a burner to a gas turbine of the gas turbine engine, a plurality of dampening cavities for the dampening of thermo-acoustic vibrations in the combustion gas, each dampening cavity communicating with the inner volume through at least a dampening hole on the inner wall, at least a cooling passage for a cooling medium flowing outside the inner volume in thermal contact with the inner wall, each dampening cavity having at least a purging hole communicating with the cooling passage for purging a portion of the cooling medium through the dampening cavities to the inner volume.Type: GrantFiled: October 14, 2015Date of Patent: September 29, 2020Assignee: Siemens AktiengesellschaftInventors: Jan Pettersson, Ulf Raadeklint
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Publication number: 20200200390Abstract: A burner of a turbomachine, particularly a gas turbine engine, has at least one burner section having an annular wall surrounding a respective section of a burner interior, the annular wall including: an annular inner surface delimiting the burner interior, and a plurality of dampening cavities for the dampening of thermo-acoustic vibrations in the burner interior, each dampening cavity being connected to the annular inner surface through at least a dampening hole. A method of manufacturing such a burner includes additive manufacturing of the annular wall as an integrally formed component, or additive manufacturing of the upstream burner section, wherein the intermediate burner section and the downstream burner section as integrally formed component.Type: ApplicationFiled: June 29, 2018Publication date: June 25, 2020Applicant: Siemens AktiengesellschaftInventors: Jan-Erik Lundgren, Jan Pettersson
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Patent number: 10196810Abstract: The present invention relates to a building and a method for assembling a building. The building comprises an external framework 10 with at least three external walls connected with a floor structure and a roof structure such that a space is formed within said framework, the external framework further comprises a support system for each floor, and at least two modules 1, wherein each module comprises four walls 2a,2b,2c,2d, a floor 4 and a roof 3, wherein said at least two modules are mounted in the space in said external framework, which said at least two modules rests on said support system 15, such that an air gap of at least 150 mm is formed between two adjacent walls of said at least two modules.Type: GrantFiled: January 30, 2015Date of Patent: February 5, 2019Assignee: MY FIRST HOME ABInventors: Magnus Bouveng, Jan Pettersson
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Publication number: 20180010798Abstract: A combustion chamber for a gas turbine engine includes: an inner wall delimiting an inner volume of the combustion chamber, through which combustion gas flow from a burner to a gas turbine of the gas turbine engine, a plurality of dampening cavities for the dampening of thermo-acoustic vibrations in the combustion gas, each dampening cavity communicating with the inner volume through at least a dampening hole on the inner wall, at least a cooling passage for a cooling medium flowing outside the inner volume in thermal contact with the inner wall, each dampening cavity having at least a purging hole communicating with the cooling passage for purging a portion of the cooling medium through the dampening cavities to the inner volume.Type: ApplicationFiled: October 14, 2015Publication date: January 11, 2018Applicant: Siemens AktiengesellschaftInventors: Jan Pettersson, Ulf Raadeklint
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Publication number: 20170167128Abstract: The present invention relates to a building and a method for assembling a building. The building comprises an external framework 10 with at least three external walls connected with a floor structure and a roof structure such that a space is formed within said framework, the external framework further comprises a support system for each floor, and at least two modules 1, wherein each module comprises four walls 2a,2b,2c,2d, a floor 4 and a roof 3, wherein said at least two modules are mounted in the space in said external framework, which said at least two modules rests on said support system 15, such that an air gap of at least 150 mm is formed between two adjacent walls of said at least two modules.Type: ApplicationFiled: January 30, 2015Publication date: June 15, 2017Inventors: Magnus BOUVENG, Jan PETTERSSON
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Patent number: 7986946Abstract: The present invention relates to methods and arrangements for gathering statistics relating to random access operation in a cell of a cellular radio communication network and supervising such random access operation. Statistics are gathered (301), per random access preamble code, relating to random access detections associated with one or more random access preamble codes used in the cell. Based on such gathered statistics, random access operation in the cell may be supervised by evaluating (311) the gathered statistics and, upon determining (312) that the random access detections associated with a specific random access preamble code exhibit an abnormal behaviour likely to be caused by false random access preamble detections, initiating (313) at least one of issuing a corresponding operation and maintenance alarm signal and automatically blocking further use of said specific random access preamble code in the cell.Type: GrantFiled: June 29, 2005Date of Patent: July 26, 2011Assignee: Telefonaktiebolaget LM Ericsson (publ)Inventor: Jan Pettersson
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Patent number: 7711385Abstract: The present invention relates to cellular mobile radio systems, and more especially it relates to Code Division Multiple Access, CDMA, cellular mobile radio systems, particularly to transmission power control in such systems. A method and apparatus for transmission of compensated TPC commands when a substantial loop delay is experienced for one or more user equipment entities is disclosed.Type: GrantFiled: October 7, 2003Date of Patent: May 4, 2010Assignee: Telefonaktiebolaget L M Ericsson (publ)Inventors: Thomas Ostman, Jan Pettersson
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Patent number: 7586865Abstract: A base station receives multiple first signals from multiple mobile terminals over a first radio channel (e.g., a RACH, a CPCH, etc.). Multiple acknowledgement signals are generated for transmission over an acquisition indication channel (AICH) during a same access time slot. Each acknowledgement signal is responsive to one of the mobile terminals and includes a signature sequence of bits associated with the first signal received from that mobile terminal. An AICH transmission power profile is determined for the access time slot. If the AICH transmission power profile exceeds a predetermined maximum transmission power parameter, then a first portion of the an AICH transmission power profile is adjusted. Thereafter, the acknowledgement signals are transmitted over the AICH in accordance with the adjusted AICH transmission power profile.Type: GrantFiled: June 22, 2006Date of Patent: September 8, 2009Assignee: Telefonaktiebolaget LM Ericsson (publ)Inventors: Leif Thomas Östman, Jan Pettersson
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Publication number: 20080207196Abstract: The present invention relates to methods and arrangements for gathering statistics relating to random access operation in a cell of a cellular radio communication network and supervising such random access operation. Statistics are gathered (301), per random access preamble code, relating to random access detections associated with one or more random access preamble codes used in the cell. Based on such gathered statistics, random access operation in the cell may be supervised by evaluating (311) the gathered statistics and, upon determining (312) that the random access detections associated with a specific random access preamble code exhibit an abnormal behaviour likely to be caused by false random access preamble detections, initiating (313) at least one of issuing a corresponding operation and maintenance alarm signal and automatically blocking further use of said specific random access preamble code in the cell.Type: ApplicationFiled: June 29, 2005Publication date: August 28, 2008Applicant: Telefonaktiebolaget LM Ericsson (pub)Inventor: Jan Pettersson
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Patent number: 7361365Abstract: A method for repelling a pest using 2-isopropyl-3-methoxi-pyrazine as a pest repellent, particularly a mole repellent, and a pest repelling composition which comprises this compound.Type: GrantFiled: April 12, 2004Date of Patent: April 22, 2008Assignee: Organox ABInventors: Mike Birkett, Jan Pettersson, John Picket
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Publication number: 20080039128Abstract: The transmit power of a radio transmitter associated with a transmitting node communicating with a receiving node is controlled based on a propagation delay time associated with communication between the transmitting node and the receiving node. A power control loop is established for controlling a transmission power level for transmitting a signal from the transmitting node to the receiving node. A response time of the power control loop is reduced based on the propagation delay time.Type: ApplicationFiled: August 9, 2006Publication date: February 14, 2008Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (publ)Inventors: Leif Thomas Ostman, Jan Pettersson
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Publication number: 20070298824Abstract: A base station receives multiple first signals from multiple mobile terminals over a first radio channel (e.g., a RACH, a CPCH, etc.). Multiple acknowledgement signals are generated for transmission over an acquisition indication channel (AICH) during a same access time slot. Each acknowledgement signal is responsive to one of the mobile terminals and includes a signature sequence of bits associated with the first signal received from that mobile terminal. An AICH transmission power profile is determined for the access time slot. If the AICH transmission power profile exceeds a predetermined maximum transmission power parameter, then a first portion of the an AICH transmission power profile is adjusted. Thereafter, the acknowledgement signals are transmitted over the AICH in accordance with the adjusted AICH transmission power profile.Type: ApplicationFiled: June 22, 2006Publication date: December 27, 2007Applicant: Telefonaktiebolaget LM Ericsson (publ)Inventors: Leif Thomas Ostman, Jan Pettersson
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Publication number: 20070248191Abstract: A receiver receives a signal and samples it at multiple sample points. During a first time interval, a first subset of the multiple sample points are selected for further receiver processing. During a second time interval, a second different subset of the multiple sample points are selected for further receiver processing. Alternatively, the sampling positions for sampling the received signal may be automatically varied so that the sampling positions change in subsequent time intervals. The subsets may be alternately selected or varied, randomly selected or varied, or selected or varied in some other fashion. Some of sample points provide more optimal samples for the received signal, and some provide less optimal samples. Having different sample points processed at different times improves receiver stability and performance.Type: ApplicationFiled: April 25, 2006Publication date: October 25, 2007Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (publ)Inventor: Jan Pettersson
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Publication number: 20070053941Abstract: A method for repelling a pest using 2-isopropyl-3-methoxi-pyrazine as a pest repellent, particularly a mole repellent, and a pest repelling composition which comprises this compound.Type: ApplicationFiled: April 12, 2004Publication date: March 8, 2007Inventors: Mike Birkett, Jan Pettersson, John Pickett
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Patent number: 6165031Abstract: A marine propulsion and steering unit (10) comprises a pod (13) having front and rear ends, a driving machine (14), e.g. a drive motor, accommodated in the pod, a substantially horizontal propeller shaft (15) drivingly connected to the driving machine and provided with a propeller (18) externally of the front end of the pod (13), and an upright pod supporting strut (12) rigidly attached to the pod and having at the upper end thereof swivel bearing means (11) supporting the pod supporting strut and the pod below a buoyant body for angular motion about a substantially vertical axis (C). The pod supporting strut (12) is shaped essentially as an upstanding airfoil the chord plane (V) of which contains or is proximal to the axis (T) of the propeller shaft (15) and the leading edge (12A) of which is directed towards the propeller (18).Type: GrantFiled: December 4, 1998Date of Patent: December 26, 2000Assignee: Kamewa ABInventors: Stig Lonngren, Jan Pettersson