Patents by Inventor Richard Bouchard
Richard Bouchard 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: 10760527Abstract: An exhaust mixer for a gas turbine engine includes an annular wall having upstream end adapted to be fastened to an engine case and a downstream end forming a plurality of inner and outer mixer lobes. A support member interconnects at least a number of the inner lobes, and includes a circumferentially extending stiffener ring located radially inwardly from the inner lobes and a series of circumferentially spaced apart mixer struts radially extending from the inner lobes to the stiffener ring. The mixer struts have a radial length at least equal to a width of a main gas path defined between the inner lobes and the exhaust cone such that the mixer struts extend entirely through the main gas path. The stiffener ring being fixed solely to the mixer struts such as to float with respect to the exhaust cone and permit relative movement therebetween.Type: GrantFiled: February 9, 2016Date of Patent: September 1, 2020Assignee: PRATT & WHITNEY CANADA CORP.Inventors: Guy Lefebvre, Nicolas Grivas, Richard Bouchard, Denis Leclair, Eric Durocher
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Patent number: 9534500Abstract: A seal arrangement for segmented turbine components comprises a sealing strip and a resilient cord element compressed against the strip to provide positive loading of the strip against the segment sealing faces. The sealing strip and the resilient cord element are engaged in confronting cavities defined in the end faces of adjacent segments. The resilient cord element is commonly held by both segments in a compressed state against the sealing strip.Type: GrantFiled: April 27, 2011Date of Patent: January 3, 2017Assignee: PRATT & WHITNEY CANADA CORP.Inventors: Richard Bouchard, John Pietrobon
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Publication number: 20160153398Abstract: An exhaust mixer for a gas turbine engine includes an annular wall having upstream end adapted to be fastened to an engine case and a downstream end forming a plurality of inner and outer mixer lobes. A support member interconnects at least a number of the inner lobes, and includes a circumferentially extending stiffener ring located radially inwardly from the inner lobes and a series of circumferentially spaced apart mixer struts radially extending from the inner lobes to the stiffener ring. The mixer struts have a radial length at least equal to a width of a main gas path defined between the inner lobes and the exhaust cone such that the mixer struts extend entirely through the main gas path. The stiffener ring being fixed solely to the mixer struts such as to float with respect to the exhaust cone and permit relative movement therebetween.Type: ApplicationFiled: February 9, 2016Publication date: June 2, 2016Inventors: Guy Lefebvre, Nicolas Grivas, Richard Bouchard, Denis Leclair, Eric Durocher
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Patent number: 9284915Abstract: An exhaust mixer for a gas turbine engine includes an annular wall having upstream end adapted to be fastened to an engine case and a downstream end forming a plurality of inner and outer mixer lobes. A support member interconnects at least a number of the inner lobes, and includes a circumferentially extending stiffener ring located radially inwardly from the inner lobes and a series of circumferentially spaced apart mixer struts radially extending from the inner lobes to the stiffener ring. The mixer struts have a radial length at least equal to a width of a main gas path defined between the inner lobes and the exhaust cone such that the mixer struts extend entirely through the main gas path. The stiffener ring being fixed solely to the mixer struts such as to float with respect to the exhaust cone and permit relative movement therebetween.Type: GrantFiled: April 28, 2014Date of Patent: March 15, 2016Assignee: PRATT & WHITNEY CANADA CORP.Inventors: Guy Lefebvre, Nicolas Grivas, Richard Bouchard, Denis Leclair, Eric Durocher
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Patent number: 9200537Abstract: A turbine exhaust case for a gas turbine engine has an outer shroud and an inner shroud concentrically defining therebetween an annular gaspath for channelling hot gases. A plurality of circumferentially spaced-apart turbine exhaust struts extends radially across the hot gaspath. The inner shroud may be provided in the form of an acoustic panel. The acoustic panel has a radially outwardly facing surface defining the radially inner flow boundary surface of the gaspath. The acoustic panel is mechanically fastened to the radially inner end of the struts.Type: GrantFiled: November 9, 2011Date of Patent: December 1, 2015Assignee: PRATT & WHITNEY CANADA CORP.Inventors: Richard Bouchard, Gaetan Girard, Christian Pronovost
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Publication number: 20150087955Abstract: The present disclosure relates to a method comprising imaging a tissue with multi-wavelength photoacoustic imaging, to provide a visualization, characterization and/or thermographic imaging of the tissue.Type: ApplicationFiled: September 24, 2014Publication date: March 26, 2015Inventors: Stanislav Emelianov, Nicholas Dana, Richard Bouchard, Luigi Di Biase, Andrea Natale
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Patent number: 8944753Abstract: A turbine exhaust case comprises inner and outer annular shrouds defining therebetween an annular hot gaspath. A circumferential array of exhaust struts extends across the gaspath. The exhaust struts are mounted at one radial end thereof on a flexible strut mounting structure. The flexible strut mounting structure is radially deflectable relative to the outer and inner shrouds to accommodate thermal expansion of the exhaust struts during engine operation.Type: GrantFiled: November 9, 2011Date of Patent: February 3, 2015Assignee: Pratt & Whitney Canada Corp.Inventors: Richard Bouchard, Daniel Trottier, Gaetan Girard
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Patent number: 8920117Abstract: A vane structure of a gas turbine engine includes a plurality of vanes extending radially between outer and inner shrouds. At least the outer shroud is formed substantially from a single-piece annular skin of sheet metal. A plurality of reinforcing plates are placed against and are affixed to an outer surface of the skin of the outer shroud in respective joining locations where a radial outer end of each of the respective vanes joins the skin.Type: GrantFiled: October 7, 2011Date of Patent: December 30, 2014Assignee: Pratt & Whitney Canada Corp.Inventors: Richard Bouchard, Douglas MacCaul, Daniel Trottier
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Patent number: 8839672Abstract: Methods of combined ultrasound and photoacoustic imaging are provided. In some embodiments, the methods may be used to determine the location or positioning of a metal object in a sample. In other embodiments, the methods may be used to determine the composition of a sample surrounding a metal object. Other methods are also provided.Type: GrantFiled: October 19, 2011Date of Patent: September 23, 2014Assignee: Board of Regents, The University of Texas SystemInventors: Stanislav Emelianov, Jimmy Su, Bo Wang, Andrei Karpiouk, Yun-Sheng Chen, Wolfgang Frey, Richard Bouchard, Kimberly Homan
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Publication number: 20140260283Abstract: An exhaust mixer for a gas turbine engine has a plurality of circumferentially distributed alternating inner and outer lobes, and a plurality of aerodynamic struts positioned and oriented between adjacent inner lobes in the core flow passage. The struts are configured for diverting a portion of the core flow radially outwardly in troughs formed by the outer lobes on the core flow side of the mixer.Type: ApplicationFiled: March 12, 2013Publication date: September 18, 2014Applicant: PRATT & WHITNEY CANADA CORP.Inventors: RICHARD BOUCHARD, MARK HUZZARD CUNNINGHAM
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Patent number: 8826669Abstract: A turbine exhaust case for a turbofan engine comprises a plurality of arcuate acoustic panels assembled into a circumferentially extending inner shroud with circumferential gaps between adjacent acoustic panels. An outer shroud extends circumferentially about the inner shroud. The inner shroud and the outer shroud define an annular gaspath therebetween. A plurality of circumferentially spaced-apart exhaust struts extends radially across the annular gaspath and structurally connects the individual acoustic panels forming the inner shroud to the outer shroud.Type: GrantFiled: November 9, 2011Date of Patent: September 9, 2014Assignee: Pratt & Whitney Canada Corp.Inventors: Richard Bouchard, John Pietrobon, Eric Durocher
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Publication number: 20140230404Abstract: An exhaust mixer for a gas turbine engine includes an annular wall having upstream end adapted to be fastened to an engine case and a downstream end forming a plurality of inner and outer mixer lobes. A support member interconnects at least a number of the inner lobes, and includes a circumferentially extending stiffener ring located radially inwardly from the inner lobes and a series of circumferentially spaced apart mixer struts radially extending from the inner lobes to the stiffener ring. The mixer struts have a radial length at least equal to a width of a main gas path defined between the inner lobes and the exhaust cone such that the mixer struts extend entirely through the main gas path. The stiffener ring being fixed solely to the mixer struts such as to float with respect to the exhaust cone and permit relative movement therebetween.Type: ApplicationFiled: April 28, 2014Publication date: August 21, 2014Applicant: Pratt & Whitney Canada Corp.Inventors: Guy LEFEBVRE, Nicolas GRIVAS, Richard BOUCHARD, Denis LECLAIR, Eric DUROCHER
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Publication number: 20140157901Abstract: Methods of combined ultrasound and photoacoustic imaging are provided. In some embodiments, the methods may be used to determine the location or positioning of a metal object in a sample. In other embodiments, the methods may be used to determine the composition of a sample surrounding a metal object. Other methods are also provided.Type: ApplicationFiled: February 12, 2014Publication date: June 12, 2014Inventors: Stanislav Emelianov, Jimmy Su, Bo Wang, Andrei Karpiouk, Yun-Sheng Chen, Wolfgang Frey, Richard Bouchard, Kimberly Homan
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Patent number: 8739513Abstract: An exhaust mixer for a gas turbine engine includes an annular wall having upstream end adapted to be fastened to an engine case and a downstream end forming a plurality of inner and outer mixer lobes. A support member interconnects at least a number of the inner lobes, and includes a circumferentially extending stiffener ring located radially inwardly from the inner lobes and a series of circumferentially spaced apart mixer struts radially extending from the inner lobes to the stiffener ring. The mixer struts have a radial length at least equal to a width of a main gas path defined between the inner lobes and the exhaust cone such that the mixer struts extend entirely through the main gas path. The stiffener ring being fixed solely to the mixer struts such as to float with respect to the exhaust cone and permit relative movement therebetween.Type: GrantFiled: August 17, 2010Date of Patent: June 3, 2014Assignee: Pratt & Whitney Canada Corp.Inventors: Guy Lefebvre, Nicolas Grivas, Richard Bouchard, Denis Leclair, Eric Durocher
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Publication number: 20130115076Abstract: A turbine exhaust case comprises inner and outer annular shrouds defining therebetween an annular hot gaspath. A circumferential array of exhaust struts extends across the gaspath. The exhaust struts are mounted at one radial end thereof on a flexible strut mounting structure. The flexible strut mounting structure is radially deflectable relative to the outer and inner shrouds to accommodate thermal expansion of the exhaust struts during engine operation.Type: ApplicationFiled: November 9, 2011Publication date: May 9, 2013Inventors: Richard Bouchard, Daniel Trottier, Gaetan Girard
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Publication number: 20130115051Abstract: A turbine exhaust case for a gas turbine engine has an outer shroud and an inner shroud concentrically defining therebetween an annular gaspath for channelling hot gases. A plurality of circumferentially spaced-apart turbine exhaust struts extends radially across the hot gaspath. The inner shroud may be provided in the form of an acoustic panel. The acoustic panel has a radially outwardly facing surface defining the radially inner flow boundary surface of the gaspath. The acoustic panel is mechanically fastened to the radially inner end of the struts.Type: ApplicationFiled: November 9, 2011Publication date: May 9, 2013Inventors: RICHARD BOUCHARD, Gaetan Girard, Christian Pronovost
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Publication number: 20130111906Abstract: A turbine exhaust case for a turbofan engine comprises a plurality of arcuate acoustic panels assembled into a circumferentially extending inner shroud with circumferential gaps between adjacent acoustic panels. An outer shroud extends circumferentially about the inner shroud. The inner shroud and the outer shroud define an annular gaspath therebetween. A plurality of circumferentially spaced-apart exhaust struts extends radially across the annular gaspath and structurally connects the individual acoustic panels forming the inner shroud to the outer shroud.Type: ApplicationFiled: November 9, 2011Publication date: May 9, 2013Inventors: RICHARD BOUCHARD, John Pietrobon, Eric Durocher
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Publication number: 20130089416Abstract: A vane structure of a gas turbine engine includes a plurality of vanes extending radially between outer and inner shrouds. At least the outer shroud is formed substantially from a single-piece annular skin of sheet metal. A plurality of reinforcing plates are placed against and are affixed to an outer surface of the skin of the outer shroud in respective joining locations where a radial outer end of each of the respective vanes joins the skin.Type: ApplicationFiled: October 7, 2011Publication date: April 11, 2013Applicant: PRATT & WHITNEY CANADA CORP.Inventors: Richard BOUCHARD, Douglas MacCAUL, Daniel TROTTIER
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Publication number: 20120274034Abstract: A seal arrangement for segmented turbine components comprises a sealing strip and a resilient cord element compressed against the strip to provide positive loading of the strip against the segment sealing faces. The sealing strip and the resilient cord element are engaged in confronting cavities defined in the end faces of adjacent segments. The resilient cord element is commonly held by both segments in a compressed state against the sealing strip.Type: ApplicationFiled: April 27, 2011Publication date: November 1, 2012Inventors: Richard BOUCHARD, John Pietrobon
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Publication number: 20120253180Abstract: Methods of combined ultrasound and photoacoustic imaging are provided. In some embodiments, the methods may be used to determine the location or positioning of a metal object in a sample. In other embodiments, the methods may be used to determine the composition of a sample surrounding a metal object. Other methods are also provided.Type: ApplicationFiled: October 19, 2011Publication date: October 4, 2012Inventors: Stanislav Emelianov, Jimmy Su, Bo Wang, Andrei Karpiouk, Yun-Sheng Chen, Wolfgang Frey, Richard Bouchard, Kimberly Homan