Patents by Inventor François Doyon
François Doyon 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: 11891903Abstract: A borescope plug assembly includes a housing, a plug, and a spring. The housing extends between a first housing end and a second housing end. The housing includes a plug aperture, an internal chamber, and a bayonet interface. The plug aperture is located at the second housing end. The internal chamber extends from the plug aperture toward the first housing end. The plug includes a shaft, a first sealing surface, and at least one tab. The shaft extends between a first shaft end and a second shaft end. The first sealing surface is disposed at the first shaft end. The at least one tab projects radially outward from the shaft. The plug extends through the plug aperture with the second shaft end and the at least one tab disposed within the internal chamber. The spring is positioned within the internal chamber between the first housing end and the at least one tab.Type: GrantFiled: April 19, 2022Date of Patent: February 6, 2024Assignee: PRATT & WHITNEY CANADA CORP.Inventors: Guy Lefebvre, Francois Doyon
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Publication number: 20230332512Abstract: A borescope plug assembly includes a housing, a plug, and a spring. The housing extends between a first housing end and a second housing end. The housing includes a plug aperture, an internal chamber, and a bayonet interface. The plug aperture is located at the second housing end. The internal chamber extends from the plug aperture toward the first housing end. The plug includes a shaft, a first sealing surface, and at least one tab. The shaft extends between a first shaft end and a second shaft end. The first sealing surface is disposed at the first shaft end. The at least one tab projects radially outward from the shaft. The plug extends through the plug aperture with the second shaft end and the at least one tab disposed within the internal chamber. The spring is positioned within the internal chamber between the first housing end and the at least one tab.Type: ApplicationFiled: April 19, 2022Publication date: October 19, 2023Inventors: Guy Lefebvre, Francois Doyon
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Patent number: 11530622Abstract: A blade containment assembly for a gas turbine engine comprises a casing having a first casing member surrounding a set of rotor blades and a second casing member extending axially from the first casing member. The first casing member has an outer annular wall welded to the second casing member at a weld joint disposed in a blade containment zone of the casing and an inner containment ring spaced radially inwardly from the outer annular wall and extending axially from a first location forward of the weld joint to a second location aft of the weld joint.Type: GrantFiled: October 16, 2020Date of Patent: December 20, 2022Assignee: PRATT & WHITNEY CANADA CORP.Inventors: Guy Lefebvre, Francois Doyon
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Patent number: 11499447Abstract: A gas turbine engine has: an engine shaft rotatable about a rotation axis; at least two bearings spaced apart from one another along the rotation axis, the at least two bearings having inner races for rotation with the engine shaft, outer races, and rolling elements disposed radially between the inner races and the outer races; a bearing support extending axially along the rotation axis from one of the at least two bearings to the other, the bearing support secured to both of the outer races of the at least two bearings, the bearing support secured to a structural case of the gas turbine engine via frangible tabs.Type: GrantFiled: January 15, 2020Date of Patent: November 15, 2022Assignee: PRATT & WHITNEY CANADA CORP.Inventors: Guy Lefebvre, François Doyon
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Patent number: 11391179Abstract: The gas turbine engine can have a structure for holding bearings within a casing, with a shaft being rotatably mounted to the casing via the bearings and via the structure, the structure having a first wall segment and a base structure receiving the bearings, the first wall segment having a proximal end structurally joined to the base structure, the first wall segment extending away from the base structure, and having a portion extending at least partially axially and thereby being radially flexible relative to the second wall segment, the structure providing both structural resistance and radial stretchability.Type: GrantFiled: February 12, 2019Date of Patent: July 19, 2022Assignee: PRATT & WHITNEY CANADA CORP.Inventors: Guy Lefebvre, Remy Synnott, François Doyon
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Publication number: 20220120197Abstract: A blade containment assembly for a gas turbine engine comprises a casing having a first casing member surrounding a set of rotor blades and a second casing member extending axially from the first casing member. The first casing member has an outer annular wall welded to the second casing member at a weld joint disposed in a blade containment zone of the casing and an inner containment ring spaced radially inwardly from the outer annular wall and extending axially from a first location forward of the weld joint to a second location aft of the weld joint.Type: ApplicationFiled: October 16, 2020Publication date: April 21, 2022Inventors: Guy LEFEBVRE, Francois DOYON
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Patent number: 11306616Abstract: A turbine exhaust case assembly has an exhaust case and a bearing housing mounted in the exhaust case. A plurality of fasteners secures the bearing housing to the exhaust case. A spacer is mounted between the fasteners and one of the bearing housing and the exhaust case. The fasteners are welded to the spacer, thereby locking the fasteners against rotation.Type: GrantFiled: January 16, 2020Date of Patent: April 19, 2022Assignee: PRATT & WHITNEY CANADA CORP.Inventors: Guy Lefebvre, Francois Doyon, Remy Synnott
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Patent number: 11268573Abstract: A bearing assembly comprises a first bearing axially spaced from a second bearing, each bearing having an inner race disposed on a shaft and having an outer race. The bearings are mounted to a mounting sleeve having an outer sleeve surface and an inner sleeve surface engaging the outer race of each bearing. The mounting sleeve has an outer surface engaged with an inner bearing support of a bearing housing having an enclosed chamber. A housing oil inlet is in fluid communication with the enclosed chamber. The mounting sleeve includes an axially extending sleeve oil passage in fluid communication with the housing oil inlet. The mounting sleeve has a first outlet in the vicinity of the first bearing and the sleeve oil passage has a second outlet in the vicinity of the second bearing.Type: GrantFiled: March 25, 2020Date of Patent: March 8, 2022Assignee: PRATT & WHITNEY CANADA CORP.Inventors: Guy Lefebvre, Francois Doyon
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Publication number: 20210301875Abstract: A bearing assembly comprises a first bearing axially spaced from a second bearing, each bearing having an inner race disposed on a shaft and having an outer race. The bearings are mounted to a mounting sleeve having an outer sleeve surface and an inner sleeve surface engaging the outer race of each bearing. The mounting sleeve has an outer surface engaged with an inner bearing support of a bearing housing having an enclosed chamber. A housing oil inlet is in fluid communication with the enclosed chamber. The mounting sleeve includes an axially extending sleeve oil passage in fluid communication with the housing oil inlet. The mounting sleeve has a first outlet in the vicinity of the first bearing and the sleeve oil passage has a second outlet in the vicinity of the second bearing.Type: ApplicationFiled: March 25, 2020Publication date: September 30, 2021Inventors: Guy LEFEBVRE, Francois DOYON
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Publication number: 20210270150Abstract: A gas turbine engine exhaust case assembly comprises: an exhaust case having an axis and defining an annular gas path; a bearing housing coaxially supported within the exhaust case; an exhaust cone coaxial and rearward of the exhaust case; a heat shield joined to the exhaust cone, the heat shield being disposed radially between the exhaust cone and the bearing housing; and a mounting bracket extending from the exhaust case and joining the exhaust case and the exhaust cone together.Type: ApplicationFiled: February 28, 2020Publication date: September 2, 2021Inventors: Guy LEFEBVRE, Francois DOYON
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Patent number: 11105222Abstract: A gas turbine engine exhaust case assembly comprises: an exhaust case having an axis and defining an annular gas path; a bearing housing coaxially supported within the exhaust case; an exhaust cone coaxial and rearward of the exhaust case; a heat shield joined to the exhaust cone, the heat shield being disposed radially between the exhaust cone and the bearing housing; and a mounting bracket extending from the exhaust case and joining the exhaust case and the exhaust cone together.Type: GrantFiled: February 28, 2020Date of Patent: August 31, 2021Assignee: PRATT & WHITNEY CANADA CORP.Inventors: Guy Lefebvre, Francois Doyon
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Publication number: 20210222589Abstract: A turbine exhaust case assembly has an exhaust case and a bearing housing mounted in the exhaust case. A plurality of fasteners secures the bearing housing to the exhaust case. A spacer is mounted between the fasteners and one of the bearing housing and the exhaust case. The fasteners are welded to the spacer, thereby locking the fasteners against rotation.Type: ApplicationFiled: January 16, 2020Publication date: July 22, 2021Inventors: Guy LEFEBVRE, Francois DOYON, Remy SYNNOTT
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Publication number: 20210215066Abstract: A gas turbine engine has: an engine shaft rotatable about a rotation axis; at least two bearings spaced apart from one another along the rotation axis, the at least two bearings having inner races for rotation with the engine shaft, outer races, and rolling elements disposed radially between the inner races and the outer races; a bearing support extending axially along the rotation axis from one of the at least two bearings to the other, the bearing support secured to both of the outer races of the at least two bearings, the bearing support secured to a structural case of the gas turbine engine via frangible tabs.Type: ApplicationFiled: January 15, 2020Publication date: July 15, 2021Inventors: Guy LEFEBVRE, François DOYON
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Patent number: 10844746Abstract: There is disclosed a bearing assembly for a gas turbine engine including at least two bearings axially spaced from one another relative to a central axis, and a squirrel cage secured to a casing of the gas turbine engine. The squirrel cage supports respective bearing loads of the at least two bearings. The squirrel cage has a frangible section between the bearings configured to preferentially fail upon application of a load greater than a preselected threshold bearing load.Type: GrantFiled: March 29, 2019Date of Patent: November 24, 2020Assignee: PRATT & WHITNEY CANADA CORP.Inventors: Guy Lefebvre, Remy Synnott, François Doyon
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Publication number: 20200308984Abstract: There is disclosed a bearing assembly for a gas turbine engine including at least two bearings axially spaced from one another relative to a central axis, and a squirrel cage secured to a casing of the gas turbine engine. The squirrel cage supports respective bearing loads of the at least two bearings. The squirrel cage has a frangible section between the bearings configured to preferentially fail upon application of a load greater than a preselected threshold bearing load.Type: ApplicationFiled: March 29, 2019Publication date: October 1, 2020Inventors: Guy LEFEBVRE, Remy SYNNOTT, François DOYON
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Publication number: 20200256212Abstract: The gas turbine engine can have a structure for holding bearings within a casing, with a shaft being rotatably mounted to the casing via the bearings and via the structure, the structure having a first wall segment and a base structure receiving the bearings, the first wall segment having a proximal end structurally joined to the base structure, the first wall segment extending away from the base structure, and having a portion extending at least partially axially and thereby being radially flexible relative to the second wall segment, the structure providing both structural resistance and radial stretchability.Type: ApplicationFiled: February 12, 2019Publication date: August 13, 2020Inventors: Guy LEFEBVRE, Remy SYNNOTT, François DOYON
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Patent number: 10514003Abstract: An exhaust duct for a gas turbine engine has an annular inlet conduit having an inlet axis. At least two outlet conduits branch off from the inlet conduit along respective outlet centerlines that are distinct from one another. The outlet centerlines when projected onto a projection plane perpendicular to the inlet axis are spaced apart from the inlet axis so as not to intersect the inlet axis.Type: GrantFiled: December 17, 2015Date of Patent: December 24, 2019Assignee: PRATT & WHITNEY CANADA CORP.Inventors: Eray Akcayoz, Francois Doyon, Julie Demers
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Patent number: 9909434Abstract: An integrated strut and turbine vane nozzle (ISV) comprising: inner and outer duct walls defining a flow passage therebetween, an array of circumferentially spaced-apart struts extending radially across the flow passage, and an array of circumferentially spaced-apart vanes extending radially across the flow passage. At least one of the struts is aligned in the circumferential direction with an associated one of the vanes and forms therewith an integrated strut-vane airfoil. The adjacent vanes on opposed sides of the integrated strut-vane airfoil have uneven axial chords relative to the other vanes.Type: GrantFiled: November 12, 2015Date of Patent: March 6, 2018Assignee: PRATT & WHITNEY CANADA CORP.Inventors: Panagiota Tsifourdaris, Edward Vlasic, Niloofar Moradi, Francois Doyon
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Patent number: 9683690Abstract: A movement-constraining assembly for a fluid-conveying system comprises a fluid-conveying tube defining an inner passage for fluid to pass therethrough. The tube is adapted to be connected to components of the fluid-conveying system at opposed ends thereof. A blocking ring is mounted to the tube with complementary surfaces between the tube and the blocking ring to block rotation between the tube and the blocking ring, the blocking ring having a first joint portion. A base is adapted to be secured to a structure, and having a second joint portion operatively joined to the first joint portion of the blocking ring to form a joint blocking at least an axial rotational degree of freedom of the fluid-conveying tube and allowing at least one translational degree of freedom of the tube relative to the structure. A method for constraining movement of a fluid-conveying tube of a fluid conveying-system is also provided.Type: GrantFiled: February 25, 2014Date of Patent: June 20, 2017Assignee: PRATT & WHITNEY CANADA CORP.Inventors: Guy Lefebvre, Francois Doyon, Yves Martin
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Publication number: 20170022832Abstract: An integrated strut and turbine vane nozzle (ISV) comprising: inner and outer duct walls defining a flow passage therebetween, an array of circumferentially spaced-apart struts extending radially across the flow passage, and an array of circumferentially spaced-apart vanes extending radially across the flow passage. At least one of the struts is aligned in the circumferential direction with an associated one of the vanes and forms therewith an integrated strut-vane airfoil. The adjacent vanes on opposed sides of the integrated strut-vane airfoil have uneven axial chords relative to the other vanes.Type: ApplicationFiled: November 12, 2015Publication date: January 26, 2017Inventors: PANAGIOTA TSIFOURDARIS, EDWARD VLASIC, NILOOFAR MORADI, FRANCOIS DOYON