Search Patents
  • Emergency power unit for electric aircraft
    Patent number: 11794914
    Abstract: Electric aircraft power plants and associated methods are provided. One power plant includes an emergency power unit (EPU) for providing electric power in the event of a malfunction of a battery pack of an electric aircraft to permit the electric aircraft to make an emergency maneuver. The EPU includes a rocket engine for generating a stream of exhaust fluid using a rocket propellant, a turbine operatively connected to extract energy from the stream of exhaust fluid generated by the rocket engine, and an electric generator operatively connected to be driven by the turbine and to supply electric power to an electric motor propelling the electric aircraft.
    Type: Grant
    Filed: July 19, 2021
    Date of Patent: October 24, 2023
    Assignee: PRATT & WHITNEY CANADA CORP.
    Inventors: Ivan Sidorovich Paradiso, Daniel Alecu
  • High pressure turbine vane cooling hole distrubution
    Patent number: 8568085
    Abstract: A turbine vane for a gas turbine engine with an airfoil portion including a perimeter wall having first, second, third and fourth sets of cooling holes defined therethrough, including the holes numbered HA-1 to HA-13, HB-1 to HB-13, PA-1 to PA-9, and SA-1 to SA-3, respectively, and located such that a central axis thereof extends through the respective point 1 and point 2 having a nominal location in accordance with the X, Y, Z Cartesian coordinate values set forth in Table 3.
    Type: Grant
    Filed: July 19, 2010
    Date of Patent: October 29, 2013
    Assignee: Pratt & Whitney Canada Corp
    Inventors: Franco Di Paola, Larry Lebel, François Doyon
  • Normally open reverse flow flapper valve
    Patent number: 6851255
    Abstract: A fluid flow actuated valve for controlling the fluid flow in a conduit comprises a support structure adapted to be mounted within the conduit and at least one flap member pivotally mounted to the support structure. The at least one flap member is pivotable between an first position for a minimum fluid flow and a second position for a maximum fluid flow. A torsion spring is attached to the at least one flap member to urge the same to pivot against a fluid pressure differential, from the first position to the second position when the fluid pressure differential is smaller than a predetermined level.
    Type: Grant
    Filed: December 18, 2002
    Date of Patent: February 8, 2005
    Assignee: Pratt & Whitney Canada Corp.
    Inventors: Paul Archibald Aitchison, Patrick David Germain, Henry Smith
  • Electric machine systems
    Patent number: 11011966
    Abstract: An electric machine system disclosed herein comprises first and second electric machines configured to drive a load. The first electric machine has a plurality of first rotors. The second electric machine has a plurality of second rotors. At least one of the second rotors is indexed relative to a respective one of the first rotors to, in use, provide a torque phase offset between the first and second electric machines. A shaft is coupled to the load and connects the respective one of the first rotors with the at least one of the second rotors. The respective one of the first rotors is coaxial with and axially spaced apart from the at least one of the second rotors.
    Type: Grant
    Filed: December 7, 2018
    Date of Patent: May 18, 2021
    Assignee: PRATT & WHITNEY CANADA CORP.
    Inventors: Eric Latulipe, Richard Freer
  • NOZZLE TIP WITH SHIELDED CORE FOR A DUAL COMBUSTION SYSTEMS
    Publication number: 20220364509
    Abstract: In one aspect of the present disclosure, there is provided a nozzle assembly comprises a first fuel conduit defined between a nozzle body and a fuel swirler and extending along a longitudinal axis from an inlet of the first fuel conduit to an outlet of the fuel nozzle assembly. A second fuel conduit is defined between the fuel swirler and a heat shield and extending along the fuel swirler along the longitudinal axis from an inlet of the second fuel conduit to the outlet of the fuel nozzle assembly. An air conduit extends through the heat shield along the longitudinal axis from an inlet of the air conduit to the outlet of the fuel nozzle assembly.
    Type: Application
    Filed: May 17, 2021
    Publication date: November 17, 2022
    Applicant: Pratt & Whitney Canada Corp.
    Inventors: Oleg Morenko, Sandeep Vishal Dhalla
  • Deformable bumper for a rotating structure of a turbine engine
    Patent number: 11384658
    Abstract: An assembly is provided for a turbine engine. This turbine engine assembly includes a stationary structure, a rotating structure, a bearing. The rotating structure rotatable about an axis relative to the stationary structure. The bearing supports the rotating structure. The stationary structure includes a flexible bearing support and a crushable bumper. The flexible bearing support supports the bearing. The crushable bumper is arranged radially outward of and axially overlaps the flexible bearing support. The stationary structure is configured such that: the flexible bearing support is disengaged from the crushable bumper during a first mode of operation; and the flexible bearing support contacts the crushable bumper during a second mode of operation.
    Type: Grant
    Filed: August 19, 2021
    Date of Patent: July 12, 2022
    Assignee: Pratt & Whitney Canada Corp.
    Inventor: Stephen Caulfeild
  • CARBON SEAL ASSEMBLY
    Publication number: 20140154053
    Abstract: A carbon seal assembly comprises an annular member adapted to be secured to a structure. An annular seal runner is sealingly mounted to a shaft to rotate therewith, with the seal runner being made of a material complementary to that of the annular member for magnetic attraction therebetween. An annular carbon seal element is mounted to the annular seal runner to rotate therewith and positioned in a gap between the annular member and the annular seal runner, the annular carbon seal element having an annular wear surface abutting against a face of the annular member. A cross-sectional area of the annular carbon seal element increases as the axial dimension of the annular seal runner decreases for at least a part of the seal.
    Type: Application
    Filed: December 5, 2012
    Publication date: June 5, 2014
    Applicant: PRATT & WHITNEY CANADA CORP.
    Inventor: Ivor John Roberts
  • Method of manufacturing nickel based super alloy parts
    Patent number: 11591683
    Abstract: There is provided a method of treating a nickel base super alloy (NiSa) article. First, the NiSa article having fine grains is obtained. The NiSa article has a uniform distribution of the fine grains and substantially uniform mechanical properties throughout. One or more regions within the NiSa article are mechanically deformed. Then, the NiSa article is heat treated to obtain coarse grains in the one or more regions, the coarse grains having a size that is larger than that of the fine grains of the NiSa article outside of the one or more regions.
    Type: Grant
    Filed: February 18, 2020
    Date of Patent: February 28, 2023
    Assignee: PRATT & WHITNEY CANADA CORP.
    Inventors: Thomas Georges, Orlando Scalzo, Marc Lorenzo Campomanes
  • Air cooler for gas turbine engine
    Patent number: 11274602
    Abstract: A turbofan engine comprising an outer bypass duct, an annular bypass flow path between the outer bypass duct and a core engine, an engine component forming an airflow obstruction adjacent the outer bypass duct, an air cooler having a tube, the tube having at least a sinuous portion extending in the annular bypass flow path, the sinuous portion extending along the outer bypass duct, downstream of the airflow obstruction, the sinuous portion configured for exchanging heat between a fluid circulating in the tube and air circulating in the bypass flow path during operation of the turbofan engine.
    Type: Grant
    Filed: May 24, 2019
    Date of Patent: March 15, 2022
    Assignee: PRATT & WHITNEY CANADA CORP.
    Inventors: Bryan William Olver, Daniel Alecu, Jason Fish, Zoran Markovic
  • Gas turbine engine and cooling air configuration for turbine section thereof
    Patent number: 10941709
    Abstract: The gas turbine engine can have a gas path extending in serial flow communication across a compressor, a combustion chamber, and a turbine, the turbine having at least one multistage turbine section having a front toward the combustion chamber and a rear opposite the front, a plenum radially outward of the gas path, and a plurality of aperture sets interspaced from one another between the front and the rear, the aperture sets providing fluid flow communication from the plenum to the gas path, and a cooling air path having an outlet fluidly connected to the plenum at the rear of the plenum.
    Type: Grant
    Filed: September 28, 2018
    Date of Patent: March 9, 2021
    Assignee: PRATT & WHITNEY CANADA CORP.
    Inventors: Ion Dinu, Mohammed Ennacer, René Paquet
  • Mounting structure for a gas turbine engine case
    Patent number: 11859506
    Abstract: A structure is provided for a gas turbine engine. This gas turbine engine structure includes an engine case, an engine pylon and an engine line. The engine case includes a base, a mounting boss and a first support element. The base extends axially along and circumferentially about an axial centerline of the engine case. The mounting boss projects radially out from the base. The first support element projects radially out from the base and laterally out from the mounting boss. The first support element is configured as or otherwise includes a peripheral boss. The engine pylon is mounted to the mounting boss. The engine line is coupled to the peripheral boss.
    Type: Grant
    Filed: May 17, 2022
    Date of Patent: January 2, 2024
    Assignee: Pratt & Whitney Canada Corp.
    Inventor: Nicholas Guglielmin
  • Apex and face seals with rotary internal combustion engine
    Patent number: 8967988
    Abstract: In one aspect, described is a rotor for a rotary internal combustion engine where a first face seal biased axially outwardly away from the first end face has opposed curled ends abutting a first seal element of a respective one of the adjacent apex seal assemblies, and a second face seal biased axially outwardly away from the second end face has opposed curled ends abutting a second seal element of a respective one of the adjacent apex seal assemblies.
    Type: Grant
    Filed: October 14, 2011
    Date of Patent: March 3, 2015
    Assignee: Pratt & Whitney Canada Corp.
    Inventors: Eugene Gekht, Jean Thomassin, Sebastien Bolduc, David Gagnon-Martin
  • System and method for dynamic engine motoring
    Patent number: 11486310
    Abstract: There is provided a dynamic motoring system and method for an aircraft engine. Motoring of the engine is initiated for an initial motoring duration and at an initial motoring interval. At least one engine parameter is measured in real-time during the motoring, the at least one engine parameter comprising a temperature of the engine. The initial motoring duration and the initial motoring interval are modified in real-time, based on a value of the at least one engine parameter during the motoring, to obtain a modified motoring duration and a modified motoring interval. The motoring continues for the modified motoring duration and at the modified motoring interval, with a speed of rotation of the engine being controlled using the modified motoring interval.
    Type: Grant
    Filed: June 8, 2020
    Date of Patent: November 1, 2022
    Assignee: PRATT & WHITNEY CANADA CORP.
    Inventor: Dana Tomescu
  • Method of identifying a source component of particulate debris in an aircraft engine
    Patent number: 11982663
    Abstract: The method can include analyzing the composition of the particulate polymer debris, including ascertaining a presence of at least one main polymer element and a presence or absence of at least one signature polymer element in the particulate debris; establishing a correlation between the particulate polymer debris and a set of components, including matching the ascertained presence of the at least one main polymer element to a family of polymers from which the components of the set, including the source component, are made; and determining the source component amongst the components of the set, including matching the ascertained presence or absence of the at least one signature polymer element to a polymer composition of the source component.
    Type: Grant
    Filed: July 19, 2022
    Date of Patent: May 14, 2024
    Assignee: PRATT & WHITNEY CANADA CORP.
    Inventor: Louis Brillon
  • Starting methods for hybrid-electric aircraft
    Patent number: 11939073
    Abstract: A method includes using an electric motor to start a thermal engine. The electric motor and thermal engine are connected to one another as the electric motor and the thermal engine of a hybrid-electric power plant in an aircraft. The electric motor can be connected to a combining gear box. The thermal engine can be connected to the combining gear box so that the electric motor and the thermal engine can provide torque to the combining gear box in a parallel hybrid-electric configuration. The combining gearbox can output torque to an air mover for providing thrust to the aircraft.
    Type: Grant
    Filed: October 30, 2020
    Date of Patent: March 26, 2024
    Assignee: PRATT & WHITNEY CANADA CORP.
    Inventors: Paul C. Imel, Sebastien Bergeron, Etienne Plamondon, Samuel Gosselin-Brisson, Leonid Guerchkovitch
  • Operation of a hybrid electric aircraft propulsion system
    Patent number: 10826415
    Abstract: Methods and systems for operating a hybrid electric aircraft propulsion system. The method comprises providing alternating current (AC) electric power to a first electric motor to drive a first rotating propulsor, providing the first electric motor with AC electric power from at least one motor inverter operatively coupled to a direct current (DC) power source, detecting a failure in a path to the first electric motor, and selectively rearranging a first switching arrangement between the generator, the at least one motor inverter, and the first electric motor.
    Type: Grant
    Filed: May 14, 2019
    Date of Patent: November 3, 2020
    Assignee: PRATT & WHITNEY CANADA CORP.
    Inventors: Eric Latulipe, Richard Freer
  • BUFFER HEAT EXCHANGERS FOR HYDROGEN ENGINES
    Publication number: 20230040971
    Abstract: In accordance with at least one aspect of this disclosure, there is provided a heat exchange system. The heat exchange system includes a first heat exchanger and a second heat exchanger. The first heat exchanger includes an engine fluid conduit fluidly connecting an engine fluid inlet to an engine fluid outlet. A first internal buffer fluid conduit fluidly connects a first buffer fluid inlet to a first buffer fluid outlet where the engine fluid conduit is in fluid isolation from the first internal buffer fluid conduit but is in thermal communication with the first internal buffer fluid conduit for heat exchange between the engine fluid and the buffer fluid.
    Type: Application
    Filed: August 9, 2021
    Publication date: February 9, 2023
    Applicant: Pratt & Whitney Canada Corp.
    Inventors: Scott Smith, Eric Durocher
  • MACHINE TOOL CERTIFICATION FOR PART SPECIFIC WORKING VOLUME
    Publication number: 20150088299
    Abstract: A method for machining a selected part with a machine tool, comprises obtaining a master part replicating at least a portion of a geometry of a selected part. The master part is loaded in a machine tool. A signature of the machine tool is defined by measuring at least dimensional data of the master part relative to the machine tool, the dimensional data being limited to a selected-part-specific working volume substantially smaller than a complete working volume of the machine tool. The machine tool is certified as being within tolerances to machine the selected part within the working volume, using the dimensional data of the signature. The selected part is machined from a workpiece with the machine tool.
    Type: Application
    Filed: September 25, 2013
    Publication date: March 26, 2015
    Applicant: Pratt & Whitney Canada Corp.
    Inventors: Mario Blais, Philippe St-Jacques
  • Asymmetric combustor heat shield panels
    Patent number: 9534784
    Abstract: A combustor heat shield assembly comprises a circumferential array of heat shield panels individually mounted to an inner surface of a combustor shell. Each heat shield panel has opposed front and back faces, the back face facing the inner surface of the combustor shell and being spaced therefrom to define an air gap. The front and back faces have a perimeter including opposed lateral edges extending between opposed circumferentially extending edges. The lateral edges of adjacent heat shield panels have complementary non-linear profiles defining an asymmetric heat shield panel interface.
    Type: Grant
    Filed: August 23, 2013
    Date of Patent: January 3, 2017
    Assignee: PRATT & WHITNEY CANADA CORP.
    Inventors: Nigel Caldwell Davenport, Eduardo David Hawie
  • METHOD OF IMMOBILIZING LOW PRESSURE SPOOL AND LOCKING TOOL THEREFORE
    Publication number: 20140255147
    Abstract: A method of immobilizing a low pressure spool assembly including maintaining a body of the locking tool in the annular gas path, attaching a securing portion of the body across an aperture defined through an annular wall delimiting the gas path; positioning a stop connected to the body of the locking tool into a rotary path of a given one of the sets of blades of the low pressure spool assembly; and rotating the high pressure spool assembly thereby biasing a blade of the given set of blades of the low pressure spool assembly against the stop, thereby immobilizing the low pressure spool assembly. A locking tool and a method of performing engine maintenance are also provided.
    Type: Application
    Filed: March 11, 2013
    Publication date: September 11, 2014
    Applicant: PRATT & WHITNEY CANADA CORP.
    Inventors: Richard ROOT, Hugo BINETTE
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