Search Patents
  • Turbofan case and method of making
    Patent number: 7266941
    Abstract: A casing for a gas turbine includes a construction providing improved structural efficiency. Improved load paths and means for transmitting loads in the engine case are disclosed.
    Type: Grant
    Filed: July 6, 2004
    Date of Patent: September 11, 2007
    Assignee: Pratt & Whitney Canada Corp.
    Inventors: Andreas Eleftheriou, Kevin Walter Lobo, Maurice Weinberg, Quantai Liu
  • Turbofan case and method of making
    Patent number: 7793488
    Abstract: A casing for a gas turbine includes a construction providing improved structural efficiency. Improved load paths and means for transmitting loads in the engine case are disclosed.
    Type: Grant
    Filed: July 20, 2007
    Date of Patent: September 14, 2010
    Assignee: Pratt & Whitney Canada Corp.
    Inventors: Andreas Eleftheriou, Kevin Walter Lobo, Maurice Weinberg, Quantai Liu
  • Turbofan case and method of making
    Patent number: 7770378
    Abstract: A casing for a gas turbine includes a construction providing improved structural efficiency. Improved load paths and means for transmitting loads in the engine case are disclosed.
    Type: Grant
    Filed: July 20, 2007
    Date of Patent: August 10, 2010
    Assignee: Pratt & Whitney Canada Corp.
    Inventors: Andreas Eleftheriou, Kevin Walter Lobo, Maurice Weinberg, Quantai Liu
  • Turbofan case and method of making
    Patent number: 7739866
    Abstract: A casing for a gas turbine includes a construction providing improved structural efficiency. Improved load paths and means for transmitting loads in the engine case are disclosed.
    Type: Grant
    Filed: July 20, 2007
    Date of Patent: June 22, 2010
    Assignee: Pratt & Whitney Canada Corp.
    Inventors: Andreas Eleftheriou, Kevin Walter Lobo, Maurice Weinberg, Quantai Liu
  • Turbofan case and method of making
    Patent number: 7565796
    Abstract: A casing for a gas turbine includes a construction providing improved structural efficiency. Improved load paths and means for transmitting loads in the engine case are disclosed.
    Type: Grant
    Filed: July 20, 2007
    Date of Patent: July 28, 2009
    Assignee: Pratt & Whitney Canada Corp.
    Inventors: Andreas Eleftheriou, Kevin Walter Lobo, Maurice Weinberg, Quantai Liu
  • Turbofan case and method of making
    Patent number: 7370467
    Abstract: A casing for a gas turbine includes a fan case, an intermediate case and a gas generator case integrated with one another.
    Type: Grant
    Filed: July 29, 2003
    Date of Patent: May 13, 2008
    Assignee: Pratt & Whitney Canada Corp.
    Inventors: Andreas Eleftheriou, Kevin Walter Lobo, Maurice Weinberg, Quantai Liu
  • Turbofan case and method of making
    Patent number: 7765787
    Abstract: A casing for a gas turbine includes a construction providing improved structural efficiency. Improved load paths and means for transmitting loads in the engine case are disclosed.
    Type: Grant
    Filed: July 20, 2007
    Date of Patent: August 3, 2010
    Assignee: Pratt & Whitney Canada Corp.
    Inventors: Andreas Eleftheriou, Kevin Walter Lobo, Maurice Weinberg, Quantai Liu
  • Apparatus and method for controlling engine windmilling
    Patent number: 7621117
    Abstract: An apparatus and method are provided for controlling the ground windmilling of at least one of the spools in a gas turbine engine. Electrical power is supplied to a braking apparatus in one aspect. In another aspect, an oil system is powered during ground windmilling.
    Type: Grant
    Filed: June 19, 2006
    Date of Patent: November 24, 2009
    Assignee: Pratt & Whitney Canada Corp.
    Inventors: Kevin Allan Dooley, William J. K. Savage
  • Support links with lockable adjustment feature
    Patent number: 8567202
    Abstract: A cam-type apparatus is included in a support link between outer and inner cases of gas turbine engines for centering the cases one to another. The cam-type apparatus is lockable to allow locking an adjusted position of the cam-type apparatus.
    Type: Grant
    Filed: May 15, 2009
    Date of Patent: October 29, 2013
    Assignee: Pratt & Whitney Canada Corp.
    Inventors: Jeffrey Bernard Heyerman, Bryan W. Olver
  • Gas turbine engine case and method of making
    Patent number: 7797922
    Abstract: A casing for an aircraft turbine bypass engine comprises a splitter having slots to receive and be welded to a plurality of struts extending between an outer ring and an inner hub of the casing.
    Type: Grant
    Filed: June 4, 2007
    Date of Patent: September 21, 2010
    Assignee: Pratt & Whitney Canada Corp.
    Inventors: Andreas Eleftheriou, David Denis, Denis Leclair, Yves Roussel
  • Low profile bleed air cooler
    Patent number: 7862293
    Abstract: A bleed air cooler assembly of a gas turbine engine comprises a cooler body defining a fluid passage therein and a connector detachably affixed with the cooler body installed in an annular bypass air passage.
    Type: Grant
    Filed: May 3, 2007
    Date of Patent: January 4, 2011
    Assignee: Pratt & Whitney Canada Corp.
    Inventor: Bryan W. Olver
  • Gas turbine aircraft engine with power variability
    Patent number: 8181442
    Abstract: A gas turbine aircraft engine with power variability is provided. The gas turbine aircraft engine comprises a compressor and a turbine mounted on a common shaft, and, a continuously variable transmission coupled to the shaft for transmitting power to a propulsion load.
    Type: Grant
    Filed: May 5, 2008
    Date of Patent: May 22, 2012
    Assignee: Pratt & Whitney Canada Corp.
    Inventor: Nashed Youssef
  • Integral cooling system for rotary engine
    Patent number: 7412831
    Abstract: A rotary combustion engine (12) with a self-cooling system comprises a heat exchanging interface for discharging excess heat from the rotary combustion engine (12), and a direct drive fan (44) integrated on the rotary engine output shaft (26) for providing a flow of forced air over the heat exchanging interface.
    Type: Grant
    Filed: August 23, 2005
    Date of Patent: August 19, 2008
    Assignee: Pratt & Whitney Canada Corp.
    Inventor: Richard Ullyott
  • Gas turbine with wired shaft forming part of a generator/motor assembly
    Patent number: 8278774
    Abstract: A gas turbine engine including an electrical assembly operable as at least one of an electric motor and a generator, with an electromagnetic rotor formed in part by a portion of one of a main shaft concentrically and drivingly connected to at least one turbine rotor and a tower shaft directly driven by the main shaft and extending generally radially therefrom.
    Type: Grant
    Filed: June 29, 2009
    Date of Patent: October 2, 2012
    Assignee: Pratt & Whitney Canada Corp.
    Inventor: Enzo Macchia
  • Gas turbine braking apparatus and method
    Patent number: 7225607
    Abstract: A device is provided which can serve one or more of the multiple functions of impeding rotation of a shaft de-coupled turbine rotor, selectively impeding rotation of a first spool of the engine, for example to permit a second spool to generate power for use in ground operation, and facilitating reduced aircraft ground speed.
    Type: Grant
    Filed: August 27, 2004
    Date of Patent: June 5, 2007
    Assignee: Pratt & Whitney Canada Corp.
    Inventors: Ronald Trumper, Stephen Arthur Anderson, Kevin Allan Dooley, Joseph Horace Brand
  • Bleed valve for a gas turbine engine
    Patent number: 7540144
    Abstract: A bleed valve for a gas turbine engine having a chamber inward of the bypass flow path and in fluid flow communication with the bypass and primary flow paths, a valve member for alternatively closing and opening the fluid flow communication with the primary flow path remaining inward of the bypass flow path, and an actuator actuating the valve member across the bypass flow path.
    Type: Grant
    Filed: October 21, 2005
    Date of Patent: June 2, 2009
    Assignee: Pratt & Whitney Canada Corp.
    Inventor: Jerzy Makuszewski
  • BLEED HOLES ORIENTED WITH GASPATH AND FLARED FOR NOISE REDUCTION
    Publication number: 20080072566
    Abstract: A gas turbine engine has a compressor assembly and a turbine assembly rotationally mounted on a shaft, the turbine assembly being driven by hot gases discharged from a combustion chamber disposed between the compressor and turbine assemblies and an engine case encasing a portion of the engine, the case having an oblong bleed hole having a major axis parallel to a gaspath direction and a minor axis perpendicular to the gaspath direction.
    Type: Application
    Filed: September 27, 2006
    Publication date: March 27, 2008
    Applicant: PRATT & WHITNEY CANADA CORP.
    Inventors: Andreas ELEFTHERIOU, David DENIS
  • Gas turbine braking apparatus and method
    Patent number: 7448198
    Abstract: A device is provided which can serve one or more of the multiple functions of impeding rotation of a shaft de-coupled turbine rotor, selectively impeding rotation of a first spool of the engine, for example to permit a second spool to generate power for use in ground operation, and facilitating reduced aircraft ground speed.
    Type: Grant
    Filed: February 21, 2007
    Date of Patent: November 11, 2008
    Assignee: Pratt & Whitney Canada Corp.
    Inventors: Ronald Trumper, Stephan Arthur Anderson, Kevin Allan Dooley, Joseph Horace Brand
  • Turbofan gas turbine engine and nacelle arrangement
    Patent number: 7685805
    Abstract: The arrangement comprises a fan by-pass duct located within the nacelle and having an inlet and an outlet. The outlet is generally oriented substantially radially and at an intermediary location along the nacelle. The nacelle has an aft section with an initially convex and substantially outwardly extending surface adjacent to the outlet of the fan by-pass duct. The surface of the aft section decreases in curvature and becomes concave towards a rear end of the engine.
    Type: Grant
    Filed: November 20, 2006
    Date of Patent: March 30, 2010
    Assignee: Pratt & Whitney Canada Corp.
    Inventor: Daniel T. Alecu
  • Operation of an aircraft engine after emergency shutdown
    Patent number: 7854582
    Abstract: A method of emergency operation of an aircraft turbofan engine during an aircraft flight is provided. The engine includes a fan shaft with a fan, and an electric motor/generator mounted for rotation therewith. The method includes shutting down the engine while allowing the engine to windmill, operating the electric motor/generator to rotate the shaft at a determined windmilling speed which is desired for the fan shaft, and operating the engine at the desired windmilling speed for substantially a remainder of the aircraft flight.
    Type: Grant
    Filed: May 8, 2007
    Date of Patent: December 21, 2010
    Assignee: Pratt & Whitney Canada Corp.
    Inventor: Richard Ullyott