Patents by Inventor Guy Lefebvre

Guy Lefebvre 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).

  • MID-TURBINE FRAME FOR GAS TURBINE ENGINE
    Publication number: 20210140344
    Abstract: A mid-turbine frame (MTF) assembly having: an outer case circumferentially extending around a central axis; an outer ring secured to the outer case and disposed radially inwardly of the outer case relative to the central axis; an inner case structurally connected to the outer case and disposed radially inwardly of the outer ring relative to the central axis; a main plenum circumferentially extending around the central axis and located between the outer case and the outer ring, the main plenum having an inlet fluidly connectable to a source of cooling air, a first outlet fluidly connected to a secondary plenum between the main plenum and the inner case, a second outlet configured to be fluidly connected to a rotor cavity of the low-pressure turbine, and a third outlet configured to be fluidly connected to a plenum surrounding a containment ring of the low-pressure turbine.
    Type: Application
    Filed: November 12, 2019
    Publication date: May 13, 2021
    Inventors: Guy LEFEBVRE, John PIETROBON, Eric LANGEVIN
  • Cooled containment case using internal plenum
    Patent number: 10975721
    Abstract: A case assembly for a turbine section has a structural outer case structurally connected to a gas generator upstream of the outer case and to an exhaust case downstream of the outer case. The assembly further comprises a containment ring mounted within the outer case and surrounding a plurality of axially spaced-apart turbine stages. An inner surface of the containment ring defines a plurality of shroud receiving portions. An annular plenum is defined between the outer case and the containment ring. The plenum has an inlet connected to a source of pressurized coolant. Outlets are circumferentially and axially distributed and defined through the containment ring. The outlets provides flow communication between the annular plenum and the plurality of axially spaced-apart turbine stages.
    Type: Grant
    Filed: December 8, 2016
    Date of Patent: April 13, 2021
    Assignee: PRATT & WHITNEY CANADA CORP.
    Inventors: Guy Lefebvre, Remy Synnott
  • Turbomachine disc cover mounting arrangement
    Patent number: 10975707
    Abstract: A gas turbine engine rotary assembly comprises a disc mounted for rotation about an axis and having a first bayonet feature, a cover mounted to the disc; and a retaining ring having a second bayonet feature engaged with the first bayonet feature of the disc.
    Type: Grant
    Filed: December 19, 2018
    Date of Patent: April 13, 2021
    Assignee: PRATT & WHITNEY CANADA CORP.
    Inventors: Vincent Paradis, Guy Lefebvre, John Pietrobon
  • REMOVAL OF CONTAMINANTS FROM AIR FOR USE IN AIRCRAFT ENGINES
    Publication number: 20210047953
    Abstract: A secondary air system for an aircraft engine comprises an air flow path communicating between a source of pressurized cooling air and an air consuming component. A filter is disposed in the air flow path upstream from the air consuming component. The filter has at least one of: openings of a size selected for capturing suspended particles; and a filter surface material for binding with chemical contaminants.
    Type: Application
    Filed: December 18, 2019
    Publication date: February 18, 2021
    Inventors: Christopher GOVER, Guy LEFEBVRE
  • Mid-turbine frame spoke cooling system and method
    Patent number: 10920612
    Abstract: A mid-turbine frame module comprises an outer structural ring, an inner structural ring and a plurality of circumferentially spaced-apart spokes structurally interconnecting the inner structural ring to the outer structural ring. At least one of the tubular spokes accommodates a service line. The remaining spokes with no service line have an internal architecture which mimics an air cooling scheme of the at least one spoke housing a service line in order to provide temperature uniformity across all spokes.
    Type: Grant
    Filed: July 13, 2016
    Date of Patent: February 16, 2021
    Assignee: PRATT & WHITNEY CANADA CORP.
    Inventors: Guy Lefebvre, Remy Synnott, John Pietrobon
  • Multiple spoke cooling system and method
    Patent number: 10914193
    Abstract: A mid-turbine frame module comprises an outer structural ring, an inner structural ring and a plurality of circumferentially spaced-apart spokes structurally interconnecting the inner structural ring to the outer structural ring. The spokes are used as air feed pipe to provide cooling to different engine systems, such as an oil scupper line and a disc cavity of an adjacent turbine disc.
    Type: Grant
    Filed: July 13, 2016
    Date of Patent: February 9, 2021
    Assignee: PRATT & WHITNEY CANADA CORP.
    Inventors: Guy Lefebvre, Remy Synnott
  • Multi-spool gas turbine engine architecture
    Patent number: 10883424
    Abstract: A multi-spool gas turbine engine comprises a low pressure (LP) spool and a high pressure (HP) spool independently rotatable about a central axis. The LP pressure spool has an LP compressor and an LP turbine. The HP spool has an HP turbine and an HP compressor. An accessory gear box (AGB) is drivingly connected to the HP spool. The LP compressor is disposed axially between the HP compressor and the AGB. A gear train drivingly couples the LP compressor to the LP turbine. The gear train is integrated to the AGB.
    Type: Grant
    Filed: December 20, 2016
    Date of Patent: January 5, 2021
    Assignee: PRATT & WHITNEY CANADA CORP.
    Inventor: Guy Lefebvre
  • Shroud segment assembly intersegment end gaps control
    Patent number: 10876429
    Abstract: An annular shroud assembly for a gas turbine engine is provided. The annular shroud assembly includes a plurality of first shroud segments having a same first arcuate length within a tolerance, at least one second shroud segment having a second arcuate length different than the first arcuate length and outside the tolerance, a plurality of first intersegment gaps between adjacent first segments, the first intersegment gaps having a circumferential dimension within a desired controlled range of dimensions, and at least two second intersegment gaps between opposed ends of the second segment and adjacent first segment. The first and second intersegment gaps are within the desired controlled range. Methods for controlling intersegment gaps between a plurality of shroud segments forming an annular shroud assembly and for forming such annular shroud assembly are also provided.
    Type: Grant
    Filed: March 21, 2019
    Date of Patent: December 29, 2020
    Assignee: PRATT & WHITNEY CANADA CORP.
    Inventors: Guy Lefebvre, Daniel Lecuyer
  • TURBINE ASSEMBLY
    Publication number: 20200392849
    Abstract: Turbine and other bladed disc assemblies and associated methods are disclosed. In an embodiment, a turbine assembly includes a rotor and a turbine disc secured to the rotor via a nut and a deformable retainer. The nut is threadably engaged with the rotor to secure the turbine disc to the rotor. The retainer is deformed to co-operatingly engage with a periphery of the nut and configured to hinder rotation of the nut relative to the rotor.
    Type: Application
    Filed: June 11, 2019
    Publication date: December 17, 2020
    Inventors: Franco DI PAOLA, Guy LEFEBVRE
  • Bearing housing
    Patent number: 10844746
    Abstract: 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: Grant
    Filed: March 29, 2019
    Date of Patent: November 24, 2020
    Assignee: PRATT & WHITNEY CANADA CORP.
    Inventors: Guy Lefebvre, Remy Synnott, François Doyon
  • Bearing assembly
    Patent number: 10844745
    Abstract: There is disclosed a bearing assembly for a gas turbine engine. The bearing assembly has a central axis and includes at least two bearings being axially spaced from one another relative to the central axis and configured to rotatably support a rotating component of the gas turbine engine. A bearing housing includes bearing supports supporting the at least two bearings. The bearing housing is securable to a casing of the gas turbine engine via hairpin structures being axially spaced from one another.
    Type: Grant
    Filed: March 29, 2019
    Date of Patent: November 24, 2020
    Inventors: Guy Lefebvre, Remy Synnott
  • Bearing housing with flexible joint
    Patent number: 10808573
    Abstract: There is disclosed a gas turbine engine including a bearing housing having at least two bearings axially spaced from one another relative to a central axis. The bearing housing has a case between the at least two bearings having a joint configured for relative axial movement between the bearing supports. A method of operating a bearing assembly including the bearing housing is also disclosed.
    Type: Grant
    Filed: March 29, 2019
    Date of Patent: October 20, 2020
    Assignee: PRATT & WHITNEY CANADA CORP.
    Inventors: Guy Lefebvre, Remy Synnott
  • BEARING HOUSING
    Publication number: 20200309143
    Abstract: There is disclosed a gas turbine engine including a bearing housing having at least two bearings axially spaced from one another relative to a central axis. The bearing housing includes an axially deformable bellows between the bearings configured to permit axial relative movement of the bearings. A method of operating a bearing assembly is also disclosed.
    Type: Application
    Filed: March 29, 2019
    Publication date: October 1, 2020
    Inventors: Guy LEFEBVRE, John PIETROBON
  • BEARING ASSEMBLY
    Publication number: 20200308983
    Abstract: There is disclosed a bearing assembly for a gas turbine engine. The bearing assembly has a central axis and includes at least two bearings being axially spaced from one another relative to the central axis and configured to rotatably support a rotating component of the gas turbine engine. A bearing housing includes bearing supports supporting the at least two bearings. The bearing housing is securable to a casing of the gas turbine engine via hairpin structures being axially spaced from one another.
    Type: Application
    Filed: March 29, 2019
    Publication date: October 1, 2020
    Inventors: Guy LEFEBVRE, Remy SYNNOTT
  • BEARING HOUSING
    Publication number: 20200308984
    Abstract: 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: Application
    Filed: March 29, 2019
    Publication date: October 1, 2020
    Inventors: Guy LEFEBVRE, Remy SYNNOTT, François DOYON
  • BEARING HOUSING WITH FLEXIBLE JOINT
    Publication number: 20200308982
    Abstract: There is disclosed a gas turbine engine including a bearing housing having at least two bearings axially spaced from one another relative to a central axis. The bearing housing has a case between the at least two bearings having a joint configured for relative axial movement between the bearing supports. A method of operating a bearing assembly including the bearing housing is also disclosed.
    Type: Application
    Filed: March 29, 2019
    Publication date: October 1, 2020
    Inventors: Guy LEFEBVRE, Remy SYNNOTT
  • SHROUD SEGMENT ASSEMBLY INTERSEGMENT END GAPS CONTROL
    Publication number: 20200300124
    Abstract: An annular shroud assembly for a gas turbine engine is provided. The annular shroud assembly includes a plurality of first shroud segments having a same first arcuate length within a tolerance, at least one second shroud segment having a second arcuate length different than the first arcuate length and outside the tolerance, a plurality of first intersegment gaps between adjacent first segments, the first intersegment gaps having a circumferential dimension within a desired controlled range of dimensions, and at least two second intersegment gaps between opposed ends of the second segment and adjacent first segment. The first and second intersegment gaps are within the desired controlled range. Methods for controlling intersegment gaps between a plurality of shroud segments forming an annular shroud assembly and for forming such annular shroud assembly are also provided.
    Type: Application
    Filed: March 21, 2019
    Publication date: September 24, 2020
    Inventors: Guy LEFEBVRE, Daniel LECUYER
  • GAS TURBINE ENGINE WITH FEED PIPE FOR BEARING HOUSING
    Publication number: 20200284161
    Abstract: The gas turbine engine can have a rotary shaft mounted to a casing via a bearing housed in a bearing housing, for rotation around a rotation axis, a gas path provided radially externally to the bearing housing, a feed pipe having a radial portion extending from an inlet end, radially inwardly across the gas path and then turning axially to an axial portion leading to an outlet configured to feed the bearing housing, the axial portion of the feed pipe broadening laterally toward the outlet.
    Type: Application
    Filed: March 5, 2019
    Publication date: September 10, 2020
    Inventors: Guy LEFEBVRE, Remy SYNNOTT
  • Multi-spool gas turbine engine architecture
    Patent number: 10767567
    Abstract: A multi-spool gas turbine engine comprises a low pressure (LP) spool and a high pressure (HP) spool. The LP spool and the HP spool are independently rotatable about an axis. The LP pressure spool has an LP compressor and an LP turbine. The HP spool has an HP turbine and an HP compressor. An accessory gear box (AGB) is axially mounted at one end of the engine. The LP compressor is axially positioned between the HP compressor and the AGB. The AGB is drivingly connected to the HP spool through the center of the LP compressor.
    Type: Grant
    Filed: January 17, 2017
    Date of Patent: September 8, 2020
    Assignee: PRATT & WHITNEY CANADA CORP.
    Inventor: Guy Lefebvre
  • Gas turbine engine exhaust mixer
    Patent number: 10760527
    Abstract: 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: Grant
    Filed: February 9, 2016
    Date of Patent: September 1, 2020
    Assignee: PRATT & WHITNEY CANADA CORP.
    Inventors: Guy Lefebvre, Nicolas Grivas, Richard Bouchard, Denis Leclair, Eric Durocher