Patents by Inventor Kevin Allan Dooley

Kevin Allan Dooley 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).

  • Architecture for electric machine
    Patent number: 7919894
    Abstract: The invention includes an electric machine having a rotor, stator and at least one winding in the stator adapted to conduct a current, and a secondary winding, electrically isolated from the first winding and inductively coupled to the first winding, which may be used to control at least one of the output voltage and current of the first winding.
    Type: Grant
    Filed: March 5, 2010
    Date of Patent: April 5, 2011
    Assignee: Pratt & Whitney Canada Corp.
    Inventor: Kevin Allan Dooley
  • Relighting a Turbofan Engine
    Publication number: 20110061396
    Abstract: The method and apparatus for in-flight relighting of a turbofan engine involve in one aspect selectively controlling an accessory drag load on one or more windmilling rotors to permit control of the windmill speed to an optimum value for relight conditions.
    Type: Application
    Filed: November 22, 2010
    Publication date: March 17, 2011
    Inventor: Kevin Allan DOOLEY
  • GAS TURBINE ENGINE INCLUDING APPARATUS TO TRANSFER POWER BETWEEN MULTIPLE SHAFTS
    Publication number: 20110036093
    Abstract: The gas turbine engine comprises at least one electrical generator and an electrical heater associated with a gas path of the engine. The heater is powered by the generator to selectively add heat to the gas turbine cycle.
    Type: Application
    Filed: February 19, 2010
    Publication date: February 17, 2011
    Applicant: PRATT & WHITNEY CANADA CORP.
    Inventor: Kevin Allan DOOLEY
  • Relighting a turbofan engine
    Patent number: 7861533
    Abstract: The method and apparatus for in-flight relighting of a turbofan engine involve in one aspect selectively controlling an accessory drag load on one or more windmilling rotors to permit control of the windmill speed to an optimum value for relight conditions.
    Type: Grant
    Filed: April 21, 2006
    Date of Patent: January 4, 2011
    Assignee: Pratt & Whitney Canada Corp
    Inventor: Kevin Allan Dooley
  • Woven electrostatic oil precipitator element
    Patent number: 7862650
    Abstract: An electrostatic precipitator element includes preferably a mesh made of at least two individually insulated conductors with defined openings therebetween. An electrical field in the openings electrostatically attracts suspended particulate to a respective conductor for collection.
    Type: Grant
    Filed: January 13, 2010
    Date of Patent: January 4, 2011
    Assignee: Pratt & Whitney Canada Corp.
    Inventor: Kevin Allan Dooley
  • METHOD AND SYSTEM FOR TAXIING AN AIRCRAFT
    Publication number: 20100327109
    Abstract: The system is used for taxiing an aircraft and comprises at least one multi-spool gas turbine engine, the engine having an electrical motor in a torque-driving engagement with a low pressure spool of the engine. The low pressure spool has a propulsor connected thereon to generate thrust when rotated. A controller is connected to the electrical motor and an electrical power source to control an amount of electrical power provided from the power source to the electrical motor so as to drive the propulsor and cause at least a major portion of the thrust to be generated by the propulsor for moving the aircraft during taxiing.
    Type: Application
    Filed: September 7, 2010
    Publication date: December 30, 2010
    Applicant: PRATT & WHITNEY CANADA CORP.
    Inventors: Kevin Allan DOOLEY, Nashed YOUSSEF
  • AIRBORNE ELECTRONICS HOUSING ASSEMBLY
    Publication number: 20100328866
    Abstract: An aircraft electronics housing assembly maintains the electronics unit at given ambient conditions despite changes in conditions outside the housing during the aircraft flight cycle.
    Type: Application
    Filed: September 13, 2010
    Publication date: December 30, 2010
    Applicant: PRATT & WHITNEY CANADA CORP.
    Inventor: Kevin Allan Dooley
  • Start flow measurement
    Patent number: 7841184
    Abstract: A method and apparatus for measuring a start fuel flow to a pilot nozzle of a fuel system of a gas turbine engine using pressure differential between fuel passages leading to fuel nozzles.
    Type: Grant
    Filed: April 19, 2007
    Date of Patent: November 30, 2010
    Assignee: Pratt & Whitney Canada Corp.
    Inventor: Kevin Allan Dooley
  • Airborne electronics housing assembly
    Patent number: 7818096
    Abstract: An aircraft electronics housing assembly maintains the electronics unit at given ambient conditions despite changes in conditions outside the housing during the aircraft flight cycle.
    Type: Grant
    Filed: May 30, 2006
    Date of Patent: October 19, 2010
    Assignee: Pratt & Whitney Canada Corp.
    Inventor: Kevin Allan Dooley
  • Method and system for taxiing an aircraft
    Patent number: 7802757
    Abstract: The system is used for taxiing an aircraft and comprises at least one multi-spool gas turbine engine, the engine having an electrical motor in a torque-driving engagement with a low pressure spool of the engine. The low pressure spool has a propulsor connected thereon to generate thrust when rotated. A controller is connected to the electrical motor and an electrical power source to control an amount of electrical power provided from the power source to the electrical motor so as to drive the propulsor and cause at least a major portion of the thrust to be generated by the propulsor for moving the aircraft during taxiing.
    Type: Grant
    Filed: November 9, 2005
    Date of Patent: September 28, 2010
    Assignee: Pratt & Whitney Canada Corp.
    Inventors: Kevin Allan Dooley, Nashed Youssef
  • Sensorless control in a permanent magnet machine
    Patent number: 7800327
    Abstract: An apparatus and method for providing improved sensorless control of permanent magnet motors is described. Induced electricity from at least one winding set is used to determine rotor position and provide feedback to a commutation circuit driving at least another winding set isolated from the first.
    Type: Grant
    Filed: September 19, 2007
    Date of Patent: September 21, 2010
    Assignee: Pratt-Whitney Canada Corp
    Inventor: Kevin Allan Dooley
  • Gas turbine engine oil system operation
    Patent number: 7793505
    Abstract: A method of operating a gas turbine engine having at least one electric machine associated therewith, the engine having an oil system communicating with an electric oil pump, at least one bearing cavity of the engine and a coolant passage of the electric machine, the method comprising the step of pumping oil intermittently to the oil system to cool the electric machine.
    Type: Grant
    Filed: May 4, 2006
    Date of Patent: September 14, 2010
    Assignee: Pratt & Whitney Canada Corp
    Inventor: Kevin Allan Dooley
  • Pump and method
    Patent number: 7794214
    Abstract: A pump for pumping a liquid comprises a rotor, a stator having at least one electrical winding and at least one cooling path, and a working conduit extending from a pump inlet to a pump outlet, the working conduit being in liquid communication with the cooling path at least at a cooling path inlet to permit a portion of the pumped liquid to circulate through the cooling path when the pump is in use.
    Type: Grant
    Filed: November 30, 2006
    Date of Patent: September 14, 2010
    Assignee: Pratt & Whitney Canada Corp.
    Inventor: Kevin Allan Dooley
  • FUEL SYSTEM OF GAS TURBINE ENGINES
    Publication number: 20100199681
    Abstract: A method for purging fuel from a fuel system of a gas turbine engine on shutdown of the engine comprises, in one aspect, terminating a fuel supply to the fuel system and using the residual compressed air to create a reversed pressure differential in the fuel system relative to a forward pressure differential of the fuel system used to maintain fuel supply for engine operation, and under the reversed pressure differential substantially purging the fuel remaining in the system therefrom to a fuel source.
    Type: Application
    Filed: April 19, 2010
    Publication date: August 12, 2010
    Applicant: PRATT & WHITNEY CANADA CORP.
    Inventor: Kevin Allan DOOLEY
  • Triggered pulsed ignition system and method
    Patent number: 7768767
    Abstract: The ignition system is for use in a gas turbine engine. It comprises an ignition plug having a triggered spark gap therein.
    Type: Grant
    Filed: May 5, 2006
    Date of Patent: August 3, 2010
    Assignee: Pratt & Whitney Canada Corp.
    Inventor: Kevin Allan Dooley
  • ARCHITECTURE FOR ELECTRIC MACHINE
    Publication number: 20100148622
    Abstract: The invention includes an electric machine having a rotor, stator and at least one winding in the stator adapted to conduct a current, and a secondary winding, electrically isolated from the first winding and inductively coupled to the first winding, which may be used to control at least one of the output voltage and current of the first winding.
    Type: Application
    Filed: March 5, 2010
    Publication date: June 17, 2010
    Applicant: PRATT & WHITNEY CANADA CORP.
    Inventor: Kevin Allan DOOLEY
  • TANDEM ELECTRIC MACHINE ARRANGEMENT
    Publication number: 20100133835
    Abstract: The tandem electric machine arrangement comprises an outside rotor having two axially spaced-apart sets of circumferentially-disposed permanent magnets. It also comprises an inside stator having at least two electrically-independent windings, the at least two windings axially spaced apart from one another and disposed relative to the magnet sets to thereby be magnetically coupled to a respective one of the sets of permanent magnets during rotation of the rotor. One of the rotor and the stator is provided in two separate pieces, each piece supported from opposite axial sides of the electric machine relative to one another. The other of the rotor and the stator is supported from substantially centrally of the two pieces.
    Type: Application
    Filed: November 28, 2008
    Publication date: June 3, 2010
    Inventors: KEVIN ALLAN DOOLEY, JOSEPH BRAND
  • Fuel system of gas turbine engines
    Patent number: 7726112
    Abstract: A method for purging fuel from a fuel system of a gas turbine engine on shutdown of the engine comprises, in one aspect, terminating a fuel supply to the fuel system and using the residual compressed air to create a reversed pressure differential in the fuel system relative to a forward pressure differential of the fuel system used to maintain fuel supply for engine operation, and under the reversed pressure differential substantially purging the fuel remaining in the system therefrom to a fuel source.
    Type: Grant
    Filed: April 24, 2006
    Date of Patent: June 1, 2010
    Assignee: Pratt & Whitney Canada Corp.
    Inventor: Kevin Allan Dooley
  • WOVEN ELECTROSTATIC OIL PRECIPITATOR ELEMENT
    Publication number: 20100107882
    Abstract: An electrostatic precipitator element comprises preferably a mesh made of at least two individually insulated conductors with defined openings therebetween. An electrical field in the openings electrostatically attracts suspended particulate to a respective conductors for collection.
    Type: Application
    Filed: January 13, 2010
    Publication date: May 6, 2010
    Applicant: PRATT & WHITNEY CANADA CORP.
    Inventor: Kevin Allan DOOLEY
  • Architecture for electric machine
    Patent number: 7709980
    Abstract: The invention includes an electric machine having a rotor, stator and at least one winding in the stator adapted to conduct a current, and a secondary winding, electrically isolated from the first winding and inductively coupled to the first winding, which may be used to control at least one of the output voltage and current of the first winding.
    Type: Grant
    Filed: July 27, 2009
    Date of Patent: May 4, 2010
    Assignee: Pratt & Whitney Canada Corp.
    Inventor: Kevin Allan Dooley