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).

  • Cooled conductor coil for an electric machine and method
    Patent number: 7705508
    Abstract: The invention includes an electric machine having a rotor, a stator and at least one electrical coil disposed in the machine and a source of coolant fluid in communication with the coil. The coil has concentric turns having spaces therebetween adapted to channel coolant flow between the concentric turns.
    Type: Grant
    Filed: May 10, 2006
    Date of Patent: April 27, 2010
    Assignee: Pratt & Whitney Canada Crop.
    Inventors: Kevin Allan Dooley, Joshua D. Bell
  • Fault monitoring of electric machines
    Patent number: 7696657
    Abstract: A method and apparatus for monitoring an electric machine system, the system having at least two machines or machine channels independently cooled by separate flows of a coolant fluid, the method including comparing coolant properties of the machines to detect a condition(s) of interest in one or more of the machines.
    Type: Grant
    Filed: May 19, 2006
    Date of Patent: April 13, 2010
    Assignee: Pratt & Whitney Canada Corp.
    Inventor: Kevin Allan Dooley
  • Modulation Control of Power Generation System
    Publication number: 20100072959
    Abstract: Methods and apparatuses are disclosed for producing current with a desired output frequency from one or more fixed or variable speed alternators by varying a saturation level of a portion of the alternator(s) based on a output frequency desired, and preferably then rectifying the output to produce a desired electrical output which may be provided as direct current or alternating current to a suitable load.
    Type: Application
    Filed: July 16, 2009
    Publication date: March 25, 2010
    Applicant: PRATT & WHITNEY CANADA CORP.
    Inventor: Kevin Allan DOOLEY
  • Current limiting means for a generator
    Patent number: 7656067
    Abstract: The invention provides means of limiting maximum current conducted through windings of an electric machine having a rotor and a stator. By encouraging an appropriate leakage flux around a winding, a leak impedance can be achieved which may be used, according to the invention, to limit the maximum current in the winding as a matter of machine design.
    Type: Grant
    Filed: September 3, 2008
    Date of Patent: February 2, 2010
    Assignee: Pratt & Whitney Canada Corp.
    Inventor: Kevin Allan Dooley
  • MOTOR DRIVING SYSTEM AND METHOD FOR STARTING A MOTOR
    Publication number: 20100019707
    Abstract: A method and system is provided for starting a motor which is useful, among other things, is useful for motors under unknown or variable load/inertia conditions. If a first attempt to start the motor using a first frequency ramp-up rate fails, a subsequent start attempt may be performed at a decreased frequency ramp-up rate. Iteration may be performed until starting of the motor is successfully achieved.
    Type: Application
    Filed: July 22, 2008
    Publication date: January 28, 2010
    Inventor: Kevin Allan DOOLEY
  • INDUCTANCE AUGMENTER FOR AN ELECTRIC MACHINE
    Publication number: 20100019605
    Abstract: The electric machine comprises a rotor and stator, the rotor and stator having generally equal axial lengths. The stator has at least one primary and at least one control winding disposed around the stator. The electric machine comprises a stator extension of a magnetic material. The stator extension is disposed coaxially with the stator and has only the at least one control winding wrapped therearound. The stator extension extends axially adjacent the stator beyond an axial terminus of the rotor and defines a magnetic circuit around the at least one control winding. The stator extension is configured such that in use, the magnetic circuit remains unsaturated thereby increasing inductance of at least one control winding in an electric alternator/motor.
    Type: Application
    Filed: July 22, 2008
    Publication date: January 28, 2010
    Inventors: KEVIN ALLAN DOOLEY, Joshua David Bell
  • Torque transmission for an aircraft engine
    Publication number: 20090322088
    Abstract: The torque transmission system for an aircraft engine permits a starter-generator to drive the engine on starting at a speed reducing ratio. Once the engine is running, the engine then drives the starter-generator also at a speed reducing ratio.
    Type: Application
    Filed: January 30, 2008
    Publication date: December 31, 2009
    Inventor: Kevin Allan Dooley
  • Electrostatic air/oil separator for aircraft engine
    Patent number: 7625435
    Abstract: An air/oil separator for use in a gas turbine engine includes a labyrinth path having an air/oil inlet, air outlet and oil outlet, a device for creating an electrical field within the labyrinth path and a device for creating a suction action at the oil outlet to draw liquid oil from the labyrinth path and for delivering the liquid oil under pressure to a pressurized source of oil in the engine.
    Type: Grant
    Filed: September 22, 2006
    Date of Patent: December 1, 2009
    Assignee: Pratt & Whitney Canada Corp.
    Inventor: Kevin Allan Dooley
  • 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
  • ARCHITECTURE FOR ELECTRIC MACHINE
    Publication number: 20090278413
    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: July 27, 2009
    Publication date: November 12, 2009
    Applicant: PRATT & WHITNEY CANADA CORP.
    Inventor: Kevin Allan DOOLEY
  • Scavenge pump system and method
    Patent number: 7603839
    Abstract: The pump system extracts motive power from oil in the pressurized oil circuit to power a scavenge pump mounted on a scavenge oil circuit.
    Type: Grant
    Filed: December 22, 2005
    Date of Patent: October 20, 2009
    Assignee: Pratt & Whitney Canada Corp.
    Inventor: Kevin Allan Dooley
  • HEAT EXCHANGE DEVICE AND METHOD
    Publication number: 20090255652
    Abstract: A heat exchange device comprising a fluid flow passage having a plurality of successive segments in fluid flow communication with one another, the segments being adapted to maintain a developing flow therein and thereby improve heat transfer.
    Type: Application
    Filed: June 15, 2009
    Publication date: October 15, 2009
    Inventors: Joseph Horace BRAND, Kevin Allan Dooley, Cameron Todd Walters, Michael Dowhan
  • POWER INVERTER AND METHOD
    Publication number: 20090237968
    Abstract: An apparatus and method for converting an input signal to an output AC signal in which the input voltage signal is inverted and modulated to provide an intermediate AC signal having twice the desired output frequency. The intermediate signal is then full-wave rectified and then the polarity of the rectified signal is switched every second cycle to produce the output AC signal of a desired frequency and voltage.
    Type: Application
    Filed: March 20, 2008
    Publication date: September 24, 2009
    Applicant: PRATT & WHITNEY CANADA CORP.
    Inventor: Kevin Allan DOOLEY
  • Architecture for electric machine
    Patent number: 7583063
    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: November 16, 2007
    Date of Patent: September 1, 2009
    Assignee: Pratt & Whitney Canada Corp.
    Inventor: Kevin Allan Dooley
  • Modulation control of power generation system
    Patent number: 7579812
    Abstract: Methods and apparatuses are disclosed for producing current with a desired output frequency from one or more fixed or variable speed alternators by varying a saturation level of a portion of the alternator(s) based on a output frequency desired, and preferably then rectifying the output to produce a desired electrical output which may be provided as direct current or alternating current to a suitable load.
    Type: Grant
    Filed: September 16, 2008
    Date of Patent: August 25, 2009
    Assignee: Pratt & Whitney Canada Corp.
    Inventor: Kevin Allan Dooley
  • SATURATION CONTROL OF ELECTRIC MACHINE
    Publication number: 20090195225
    Abstract: The invention includes an electric alternator/motor having a rotor, stator and at least one winding in the stator adapted to conduct a current, the machine also having and first and second magnetic circuits, one of which includes a saturable portion in which saturation may be controlled to permit control of the machine.
    Type: Application
    Filed: April 13, 2009
    Publication date: August 6, 2009
    Applicant: PRATT & WHITNEY CANADA CORP.
    Inventors: Kevin Allan Dooley, Joshua David Bell
  • Pump and method
    Patent number: 7568896
    Abstract: A pump for moving a liquid including a stator and a rotor which rotates to move at least one helical pumping member. The rotor in rotation is radially supported relative to the stator only by a layer of liquid maintained between the rotor and stator by rotor rotation.
    Type: Grant
    Filed: November 30, 2006
    Date of Patent: August 4, 2009
    Assignee: Pratt & Whitney Canada Corp.
    Inventor: Kevin Allan Dooley
  • Saturation control of electric machine
    Patent number: 7545056
    Abstract: The invention includes an electric alternator/motor having a rotor, stator and at least one winding in the stator adapted to conduct a current, the machine also having and first and second magnetic circuits, one of which includes a saturable portion in which saturation may be controlled to permit control of the machine.
    Type: Grant
    Filed: May 26, 2006
    Date of Patent: June 9, 2009
    Assignee: Pratt & Whitney Canada Corp.
    Inventors: Kevin Allan Dooley, Joshua David Bell
  • Emergency fuel shutoff system
    Patent number: 7536850
    Abstract: The emergency fuel shutoff system for a gas turbine engine comprises a pyrotechnic device which allows the fuel circuit to be closed upon triggering of the pyrotechnic device.
    Type: Grant
    Filed: September 27, 2005
    Date of Patent: May 26, 2009
    Assignee: Pratt & Whitney Canada Corp.
    Inventors: Kevin Allan Dooley, Joseph Brand
  • Surge detection in a gas turbine engine
    Patent number: 7530260
    Abstract: A method for detecting a surge condition during operation of a gas turbine engine includes detecting a change of pressure differential between fuel flows in a fuel system of the engine during engine operation.
    Type: Grant
    Filed: April 19, 2007
    Date of Patent: May 12, 2009
    Assignee: Pratt & Whitney Canada Corp.
    Inventor: Kevin Allan Dooley