Patents by Inventor Stephen Long

Stephen Long 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).

  • Publication number: 20220365882
    Abstract: Apparatuses, systems, and techniques to control operation of a memory cache. In at least one embodiment, cache guidance is specified within application source code by associating guidance with declaration of a memory block, and then applying specified guidance to source code statements that access said memory block.
    Type: Application
    Filed: August 5, 2021
    Publication date: November 17, 2022
    Inventors: Harold Carter Edwards, Luke David Durant, Stephen Jones, Jack H. Choquette, Ronny Krashinsky, Dmitri Vainbrand, Olivier Giroux, Olivier Francois Joseph Harel, Shirish Gadre, Ze Long, Matthieu Tardy, David Dastous St Hilaire, Gokul Ramaswamy Hirisave Chandra Shekhara, Jaydeep Marathe, Jaewook Shin, Jayashree Venkatesh, Girish Bhaskar Bharambe
  • Patent number: 10920546
    Abstract: An exemplary method of the present disclosure includes causing, by a processing system proximate to the wellbore, injection of the lift gas into the wellbore at a first gas injection rate; obtaining, by the processing system, a first indication of a parameter associated with the wellbore, an arrival of a first fluid at a wellhead associated with the wellbore, or a composition of the first fluid; determining, by the processing system and based on the first indication, at least one of: a second gas injection rate of the intermittent gas lift system, a first period to inject the lift gas with the intermittent gas lift system, or a second period, subsequent to the first period, with no injection of the lift gas by the intermittent gas lift system; and operating, by the processing system, the intermittent gas lift system according to the determination.
    Type: Grant
    Filed: May 15, 2020
    Date of Patent: February 16, 2021
    Assignee: Weatherford Technology Holdings, LLC
    Inventors: Ross Moffett, Ashish David Rakhit, Stephen Long, Michael S. Juenke, Stephen E. Cannon
  • Publication number: 20210009282
    Abstract: A hybrid interchangeable battery evaluation tool (HIBET) is provided. HIBET determines an amount of electrical energy and an amount of jet fuel necessary for a hybrid electric aircraft to complete a flight based on a range of the flight, a payload of the hybrid electric aircraft, an indication of a battery mass limitation of the hybrid electric aircraft, and an optimization of an energy split between the electrical energy and the jet fuel. HIBET causes an indication of the amount of electrical energy to be displayed in a graphical user interface and/or to be otherwise outputted.
    Type: Application
    Filed: July 11, 2019
    Publication date: January 14, 2021
    Applicant: Rolls-Royce North American Technologies Inc.
    Inventors: Stephen Long, Dwayne Bevis, Sean Guitar, Michael J. Armstrong
  • Publication number: 20200277844
    Abstract: An exemplary method of the present disclosure includes causing, by a processing system proximate to the wellbore, injection of the lift gas into the wellbore at a first gas injection rate; obtaining, by the processing system, a first indication of a parameter associated with the wellbore, an arrival of a first fluid at a wellhead associated with the wellbore, or a composition of the first fluid; determining, by the processing system and based on the first indication, at least one of: a second gas injection rate of the intermittent gas lift system, a first period to inject the lift gas with the intermittent gas lift system, or a second period, subsequent to the first period, with no injection of the lift gas by the intermittent gas lift system; and operating, by the processing system, the intermittent gas lift system according to the determination.
    Type: Application
    Filed: May 15, 2020
    Publication date: September 3, 2020
    Inventors: Ross MOFFETT, Ashish DAVID RAKHIT, Stephen LONG, Michael S. JUENKE, Stephen E. CANNON
  • Publication number: 20200262579
    Abstract: Systems and methods are disclosed for providing flexible, scalable, and controllable electrical power to an aircraft. In some embodiments, a modular power unit comprises a container containing a power generation unit, a control system, a conditioning system, and an environmental control system. The power generation unit produces a generated power. The control system provides control signals to the power generation unit and controls at least one parameter of the generated power. The conditioning system receives and conditions the generated power and provides an output power to the power bus of the aircraft. The environmental control system provides a temperature regulating fluid to the power generation unit.
    Type: Application
    Filed: February 20, 2019
    Publication date: August 20, 2020
    Applicant: Rolls-Royce North American Technologies Inc.
    Inventors: Stephen Long, Dwayne Bevis, Sean Guitar
  • Patent number: 10689958
    Abstract: An exemplary method of the present disclosure includes causing, by a processing system proximate to the wellbore, injection of the lift gas into the wellbore at a first gas injection rate; obtaining, by the processing system, a first indication of a parameter associated with the wellbore, an arrival of a first fluid at a wellhead associated with the wellbore, or a composition of the first fluid; determining, by the processing system and based on the first indication, at least one of: a second gas injection rate of the intermittent gas lift system, a first period to inject the lift gas with the intermittent gas lift system, or a second period, subsequent to the first period, with no injection of the lift gas by the intermittent gas lift system; and operating, by the processing system, the intermittent gas lift system according to the determination.
    Type: Grant
    Filed: December 22, 2016
    Date of Patent: June 23, 2020
    Assignee: Weatherford Technology Holdings, LLC
    Inventors: Ross Moffett, Ashish Rakhit, Stephen Long, Michael S. Juenke, Stephen E. Cannon
  • Publication number: 20180179869
    Abstract: An exemplary method of the present disclosure includes causing, by a processing system proximate to the wellbore, injection of the lift gas into the wellbore at a first gas injection rate; obtaining, by the processing system, a first indication of a parameter associated with the wellbore, an arrival of a first fluid at a wellhead associated with the wellbore, or a composition of the first fluid; determining, by the processing system and based on the first indication, at least one of: a second gas injection rate of the intermittent gas lift system, a first period to inject the lift gas with the intermittent gas lift system, or a second period, subsequent to the first period, with no injection of the lift gas by the intermittent gas lift system; and operating, by the processing system, the intermittent gas lift system according to the determination.
    Type: Application
    Filed: December 22, 2016
    Publication date: June 28, 2018
    Inventors: Ross Moffett, Ashish RAKHIT, Stephen LONG, Michael S. JUENKE, Stephen E. CANNON
  • Patent number: 9390619
    Abstract: An accessory for a device includes an actuator that is configured to be activated to operate a switch on the device when the accessory is physically engaged with the device. The switch is operable to cause the device to switch between on and off modes in which the device is configured to function. The off mode is a mode in which the device consumes less energy than when in the on mode. A controller is communicatively coupled with the actuator and is configured to activate the actuator to operate the switch when power is applied to the actuator.
    Type: Grant
    Filed: March 11, 2014
    Date of Patent: July 12, 2016
    Assignee: Smiths Detection-Watford Limited
    Inventors: Steve Richardson, Stephen Long
  • Patent number: 8653797
    Abstract: A synchronous electrical machine comprises a plurality of phases and detecting means arranged to detect an open-circuit fault in at least one of the phases of the synchronous electrical machine. Isolating means is arranged to isolate the at least one phase of the synchronous electrical machine with the fault. Phase shift means are arranged to produce a controlled phase shift between the voltage and the current within the remaining phases of the synchronous electrical machine so as to adjust the phase angle of the second harmonic powers produced by the remaining phases of the synchronous electrical machine such that the vector sum of the second harmonic power vectors of the remaining phases of the synchronous electrical machine is zero to eliminate torque ripple. The phase shift means is arranged to adjust the phase angle of all the remaining phases by the same predetermined angle to maximize the torque ripple-free power output of the synchronous electrical machine.
    Type: Grant
    Filed: May 12, 2009
    Date of Patent: February 18, 2014
    Assignee: Rolls-Royce PLC
    Inventors: John J. A. Cullen, David R. Trainer, Stephen A. Long, Angus G. L. Moodie
  • Patent number: 8635027
    Abstract: A method of determining common three-dimensional structural features of protein surfaces is provided, as is use of representations of these common structures in molecular database searching and in designing focused molecular libraries. The method is particularly concerned with the analysis and representation of protein surfaces such as b-turns, loops and contact surfaces. In one form, the method identifies common locations and orientations of amino acid side-chains, simplified as C?-C? vectors. In another form, the method identifies common regions of surface charge represented by grid points in three-dimensional space. Further provided are common three dimensional structural features of proteins that can be used to search molecular databases for the purposes of identifying molecules that match these common three dimensional structural features.
    Type: Grant
    Filed: August 17, 2009
    Date of Patent: January 21, 2014
    Assignee: The University of Queensland
    Inventors: Mark Leslie Smythe, Tran Trung Tran, Darryn Bryant, Stephen Long, Peter Adams
  • Patent number: 8570774
    Abstract: An electrical power system includes an alternating current (AC) power source configured to output an AC signal, a single phase pulse-width modulated (PWM) rectifier coupled to the AC power source and to an electrical load; a DC link capacitor coupled in parallel to the load and the PWM rectifier; and an active ripple energy storage circuit. The active ripple energy storage circuit has a first terminal, a second terminal and a third terminal, the active ripple energy storage circuit being coupled in parallel to the electrical load, the PWM rectifier and the DC link capacitor via the first terminal and the second terminal, the third terminal being coupled to the second terminal, the active ripple energy storage circuit being configured to selectively absorb and discharge at least part of the ripple energy.
    Type: Grant
    Filed: July 29, 2009
    Date of Patent: October 29, 2013
    Inventors: Ruxi Wang, Fred Wang, Rolando Burgos, Dushan Boroyevich, Kaushik Rajashekara, Stephen A. Long
  • Patent number: 8154260
    Abstract: Within generator systems maintenance of stability in terms of voltage is desirable. Generally, several generators will be arranged in parallel within the generator system with one generator voltage controlled to provide dynamic responsiveness to load switching. With regard to some loads which are generally of an active nature, the capacity of a first generator, which is voltage controlled, may be insufficient to adequately avoid transient voltage instability. By providing an actuator signal from a load to act as a pre-emptive or forward feed to an electrical current controlled generator, that second electrical current generator can be arranged to provide additional or reduced electrical current to avoid system voltage instability.
    Type: Grant
    Filed: March 16, 2009
    Date of Patent: April 10, 2012
    Assignee: Rolls-Royce PLC
    Inventors: Lihua Hu, David R Trainer, Stephen A Long
  • Patent number: 8125196
    Abstract: Utilisation of a number of electrical machines such as generators all driven by a common prime mover, such as a gas turbine engine, are known. However, faults in one phase of one particular electrical machine may cause torque vibration and therefore stressing to mechanical linkages between the electrical machine and the prime mover. By determining torque vibration and then utilising a second electrical machine to introduce an anti-phase torque vibration a substantially balanced and steady torque loading to the mechanical linkages can be achieved.
    Type: Grant
    Filed: July 21, 2009
    Date of Patent: February 28, 2012
    Assignee: Rolls-Royce PLC
    Inventors: David R Trainer, Thomas C J Feehally, Stephen A Long
  • Patent number: 8111496
    Abstract: An earthing arrangement for a DC electrical system (10), the electrical system (10) comprises a plurality of earthing points (24A, 24B, 24C) and each earthing point (24A, 24B, 24C) is directly and permanently connected to earth (26) by a high impedance connection (28A, 28B, 28C). Each earthing point (24A, 24B, 24C) is selectively connectable to earth (26) in electrical parallel with the high impedance connection (28A, 28B, 28C) by a solid connection (30A, 30B, 30C) and a switch (32A, 32B, 32C). In first mode of operation the switch (32A) between the earthing point (24A) and the earth (26) of only one of the plurality of earthing points (24A, 24B, 24C) is closed.
    Type: Grant
    Filed: February 11, 2009
    Date of Patent: February 7, 2012
    Assignee: Rolls-Royce PLC
    Inventors: Stephen A Long, David R Trainer, Lihua Hu, Huw L Edwards
  • Publication number: 20110080000
    Abstract: A synchronous electrical machine comprises a plurality of phases and detecting means arranged to detect an open-circuit fault in at least one of the phases of the synchronous electrical machine. Isolating means is arranged to isolate the at least one phase of the synchronous electrical machine with the fault. Phase shift means are arranged to produce a controlled phase shift between the voltage and the current within the remaining phases of the synchronous electrical machine so as to adjust the phase angle of the second harmonic powers produced by the remaining phases of the synchronous electrical machine such that the vector sum of the second harmonic power vectors of the remaining phases of the synchronous electrical machine is zero to eliminate torque ripple. The phase shift means is arranged to adjust the phase angle of all the remaining phases by the same predetermined angle to maximise the torque ripple-free power output of the synchronous electrical machine.
    Type: Application
    Filed: May 12, 2009
    Publication date: April 7, 2011
    Applicant: ROLLS-ROYCE PLC
    Inventors: John J. A. Cullen, David R. Trainer, Stephen A. Long, Angus G. L. Moodie
  • Patent number: 7847431
    Abstract: Electrical power generation systems typically comprise an electrical power distribution arrangement in which a number of electrical power generators are coupled in parallel. In such circumstances in order to avoid conflict generally a first electrical power generator is controlled with a voltage controller while second electrical power generators have electrical current controllers. As loads are switched into and out of the electrical distribution system in normal operation the first electrical power generator and its voltage controller can accommodate voltage dynamics and therefore maintain a desired voltage. However, in order to accommodate heavier loads switching, the dynamic operation of the electrical current controller is achieved through utilizing operational voltage margins from a desired voltage as control signals to the electrical current controller.
    Type: Grant
    Filed: March 16, 2009
    Date of Patent: December 7, 2010
    Assignee: Rolls-Royce plc
    Inventors: Lihua Hu, David R Trainer, Stephen A Long
  • Publication number: 20100095669
    Abstract: The invention relates to a method of actuating by means of a wax actuator and to a wax actuator. The wax actuator (10, 100, 200) includes a wax expansion generator comprising a housing (12) defining a chamber (18) which is partially filled with wax (20.1) and partially filled with hydraulic fluid, the wax (20.1) and the hydraulic fluid being separated by at least one sealing interface (20.2, 202), and heating means (22) for heating the wax (20.1) to cause it to melt and expand. The wax actuator (10, 100, 200) further includes a hydraulic transmission device comprising a hydraulic line (38) in communication with the hydraulic fluid within the chamber (18) and a connector (40) at a downstream end of the hydraulic line (38) for use in connecting the hydraulic line (38) to a working object.
    Type: Application
    Filed: March 14, 2008
    Publication date: April 22, 2010
    Applicant: CSIR
    Inventors: Philip Wayne Loveday, Craig Stephen Long
  • Publication number: 20100045221
    Abstract: Electrical machine arrangements have advantages with regard to providing local electrical power and starting. Embedding such electrical machine arrangements in machinery such as gas turbine engines is advantageous in removing mechanical linkages and reducing aerodynamic drag. However, the components utilised must be able to withstand harsh environmental conditions and therefore the DC link capacitor used for smoothing of voltage fluctuations are limited to relatively low capacitance densities. Low density DC link capacitors require large sizes which render electrical machines less acceptable for embedded usage. By providing offset of electrical current in inductance elements such as stator windings and stator coils of electrical machines in dead periods of the cycle a reduction in DC link capacitor requirements is achieved reducing the size, weight and complexity of installing electrical machines in gas turbine engines.
    Type: Application
    Filed: March 4, 2009
    Publication date: February 25, 2010
    Applicant: ROLLS-ROYCE PLC
    Inventors: David R. Trainer, Harsh Agarwal, Stephen M. Husband, Gareth E. Moore, David J. Powell, Stephen A. Long
  • Publication number: 20100038969
    Abstract: Electrical power generation systems typically comprise an electrical power distribution arrangement in which a number of electrical power generators are coupled in parallel. In such circumstances in order to avoid conflict generally a first electrical power generator is controlled with a voltage controller whilst second electrical power generators have electrical current controllers. As loads are switched into and out of the electrical distribution system in normal operation the first electrical power generator and its voltage controller can accommodate voltage dynamics and therefore maintain a desired voltage. However, in order to accommodate heavier loads switching, the dynamic operation of the electrical current controller is achieved through utilising operational voltage margins from a desired voltage as control signals to the electrical current controller.
    Type: Application
    Filed: March 16, 2009
    Publication date: February 18, 2010
    Applicant: ROLLS-ROYCE PLC
    Inventors: Lihua Hu, David R. Trainer, Stephen A. Long
  • Patent number: D759901
    Type: Grant
    Filed: May 22, 2015
    Date of Patent: June 21, 2016
    Inventor: Stephen Long