Patents by Inventor David Dixon

David Dixon 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).

  • Process for Leaching Metal Sulfides with Reagents Having Thiocarbonyl Functional Groups
    Publication number: 20200181732
    Abstract: This application pertains to methods of recovering metals from metal sulfides that involve contacting the metal sulfide with an acidic sulfate solution containing ferric sulfate and a reagent that has a thiocarbonyl functional group, wherein the concentration of reagent in the acidic sulfate solution is sufficient to increase the rate of metal ion extraction relative to an acidic sulfate solution that does not contain the reagent, to produce a pregnant solution containing the metal ions.
    Type: Application
    Filed: January 15, 2020
    Publication date: June 11, 2020
    Inventors: David DIXON, Oscar OLVERA OLMEDO, Edouard ASSELIN, Ahmad GHAHREMAN, Zihe REN
  • Process for Leaching Metal Sulfides with Reagents Having Thiocarbonyl Functional Groups
    Publication number: 20200181737
    Abstract: This application pertains to methods of recovering metals from metal sulfides that involve contacting the metal sulfide with an acidic sulfate solution containing ferric sulfate and a reagent that has a thiocarbonyl functional group, wherein the concentration of reagent in the acidic sulfate solution is sufficient to increase the rate of metal ion extraction relative to an acidic sulfate solution that does not contain the reagent, to produce a pregnant solution containing the metal ions.
    Type: Application
    Filed: January 21, 2020
    Publication date: June 11, 2020
    Inventors: David DIXON, Oscar OLVERA OLMEDO, Edouard ASSELIN, Ahmad GHAHREMAN, Zihe REN
  • Control system for electric motor
    Patent number: 10663517
    Abstract: A control system for an electric motor comprises a current controller which produces a set of voltage demands for the motor, a current sensing means arranged to produce a current sensing output indicative of electric current in the motor, and a current signal processing means arranged to process the current sensing output signal to produce a modified current signal in which at least one harmonic component present in the current sensing output signal due to inaccuracies in the current measurement is removed or substantially reduced. The modified current signal is combined with a demanded motor current to provide the input to the current controller.
    Type: Grant
    Filed: March 17, 2017
    Date of Patent: May 26, 2020
    Assignee: TRW Limited
    Inventors: Christopher David Dixon, Peter Geoffrey Scotson
  • Process for Leaching Metal Sulfides with Reagents Having Thiocarbonyl Functional Groups
    Publication number: 20200149132
    Abstract: This application pertains to methods of recovering metals from metal sulfides that involve contacting the metal sulfide with an acidic sulfate solution containing ferric sulfate and a reagent that has a thiocarbonyl functional group, wherein the concentration of reagent in the acidic sulfate solution is sufficient to increase the rate of metal ion extraction relative to an acidic sulfate solution that does not contain the reagent, to produce a pregnant solution containing the metal ions.
    Type: Application
    Filed: January 15, 2020
    Publication date: May 14, 2020
    Inventors: David DIXON, Oscar OLVERA OLMEDO, Edouard ASSELIN, Ahmad GHAHREMAN, Zihe REN
  • Process for Leaching Metal Sulfides with Reagents Having Thiocarbonyl Functional Groups
    Publication number: 20200149131
    Abstract: This application pertains to methods of recovering metals from metal sulfides that involve contacting the metal sulfide with an acidic sulfate solution containing ferric sulfate and a reagent that has a thiocarbonyl functional group, wherein the concentration of reagent in the acidic sulfate solution is sufficient to increase the rate of metal ion extraction relative to an acidic sulfate solution that does not contain the reagent, to produce a pregnant solution containing the metal ions.
    Type: Application
    Filed: January 15, 2020
    Publication date: May 14, 2020
    Inventors: David DIXON, Oscar OLVERA OLMEDO, Edouard ASSELIN, Ahmad GHAHREMAN, Zihe REN
  • Humidification system
    Patent number: 10646683
    Abstract: The present invention provides a method for reducing condensed humidifying agent in a humidification system by pulsing a delivery of humidifying agent into a respiratory circuit. During a non-pulsed interval, gas flowing through the respiratory circuit will evaporate the condensed humidifying agent present in the respiratory circuit. The present invention also provides a method and apparatus for delivering humidified gas to a patient, wherein the delivery avoids the problems associated with a stationary water humidifier. In the method, the delivery of humidifying agent is precisely controlled to deliver a flow of humidifying agent to a volume of gas.
    Type: Grant
    Filed: February 8, 2016
    Date of Patent: May 12, 2020
    Assignee: Vyaire Medical Consumables LLC
    Inventors: Neil Alex Korneff, Paul David Dixon, Christopher M. Varga
  • Motor control
    Patent number: 10651766
    Abstract: A motor control circuit for an electric motor of an electric power assisted steering system of the kind in which a measurement of torque carried by a part of the steering system is used to produce a torque demand signal indicative of a torque to be applied to the steering system by the motor. The motor control circuit includes a current controller is responsive to an error signal that represents the difference between a current demand signal and an actual current signal, and a noise reduction circuit adapted to identify an operating condition of the system in which the motor is stationary or rotating at a very low speed, and in the event that the operating condition is identified the noise reduction circuit is adapted to reduce the response of the controller to variations in the error signal.
    Type: Grant
    Filed: March 5, 2014
    Date of Patent: May 12, 2020
    Assignee: TRW Limited
    Inventor: Christopher David Dixon
  • Replaceable hardfacing
    Patent number: 10632713
    Abstract: A tool can include a substrate with a support surface and at least one mechanical registration feature. The tool can also include a removable wear material including a matrix material. The removable wear material can include a matrix material shaped to be received by the at least one mechanical registration feature of the substrate. The removable wear material can be attached to the substrate so that the at least one mechanical registration feature registers the removable wear material.
    Type: Grant
    Filed: June 7, 2016
    Date of Patent: April 28, 2020
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Stuart David Dixon Walker, Fabio Cappi, Are Funderud
  • Aryl ethers and uses thereof
    Patent number: 10597366
    Abstract: The present disclosure relates to HIF-2? inhibitors and methods of making and using them for treating cancer. Certain compounds were potent in HIF-2? scintillation proximity assay, luciferase assay, and VEGF ELISA assay, and led to tumor size reduction and regression in 786-O xenograft bearing mice in vivo.
    Type: Grant
    Filed: October 18, 2018
    Date of Patent: March 24, 2020
    Assignee: Peloton Therapeutics, Inc.
    Inventors: Darryl David Dixon, Jonas Grina, John A. Josey, James P. Rizzi, Stephen T. Schlachter, Eli M. Wallace, Bin Wang, Paul Wehn, Rui Xu, Hanbiao Yang
  • Motor Control System
    Publication number: 20200059180
    Abstract: A control system for an electric motor comprises a controller which receives as an input a demanded motor current and produces at an output an intermediate voltage demand signal, a voltage demand signal correction means arranged to generate a voltage demand correction signal, and a combining means arranged to combine the intermediate voltage demand signal and the voltage demand correction signal to produce an actual voltage demand signal that is applied to the motor by pulse width modulation of the switches of a motor bridge driver. The correction signal compensates for unwanted non-linearities caused by interlock delays in the switching of the motor bridge switches.
    Type: Application
    Filed: December 16, 2016
    Publication date: February 20, 2020
    Applicants: TRW Limited, TRW Automotive US LLC, ZF Friedrichshafen AG
    Inventors: Christopher David Dixon, Connel Brett Williams, Prerit Terway, Abraham Ghafari, Hassan Lamsahel, Mesut Er
  • OPERATING DEVICE HAVING A TEST SWITCH AND STATUS INDICATOR
    Publication number: 20200059997
    Abstract: Arrangement comprising an operating device (1) for emergency lighting and a first light-emitting diode (12), a second light-emitting diode (13, and a test switch (11), wherein the operating device (1) comprises a first connection (9.1) and a second connection (9.2), wherein the first light emitting diode (12) and the second light emitting diode (13) are connected in parallel between the first connection (9.1) and the second connection (9.2).
    Type: Application
    Filed: October 3, 2017
    Publication date: February 20, 2020
    Applicant: TRIDONIC GMBH & CO KG
    Inventor: David Dixon
  • PROCESS FOR LEACHING METAL SULFIDES WITH REAGENTS HAVING THIOCARBONYL FUNCTIONAL GROUPS
    Publication number: 20200048736
    Abstract: This application pertains to methods of recovering metals from metal sulfides that involve contacting the metal sulfide with an acidic sulfate solution containing ferric sulfate and a reagent that has a thiocarbonyl functional group, wherein the concentration of reagent in the acidic sulfate solution is sufficient to increase the rate of metal ion extraction relative to an acidic sulfate solution that does not contain the reagent, to produce a pregnant solution containing the metal ions.
    Type: Application
    Filed: October 19, 2017
    Publication date: February 13, 2020
    Inventors: David DIXON, Edouard ASSELIN, Zihe REN, Nelson MORA HUERTAS
  • Control strategy for a motor of an electric assisted steering system
    Patent number: 10549774
    Abstract: A control strategy for an electric motor of an electric power assisted steering system of the kind in which a control means produces motor current demand signals that are fed to a motor drive means, the demand signals being dependent on the amount of assistance torque demanded from the motor, the motor drive means being arranged to cause currents to flow in each phase of the motor as required to meet the demanded assistance torque, the control strategy comprising limiting the rate of change of current that is drawn from the electrical supply of the vehicle by the motor in the event that it would otherwise exceed a threshold rate of change.
    Type: Grant
    Filed: October 15, 2013
    Date of Patent: February 4, 2020
    Assignee: TRW Limited
    Inventors: Christopher David Dixon, Peter Geoffrey Scotson, Adrian Szabo, Hui Jiang
  • PHASE-CHANGING BORANE CONTAINING FUEL
    Publication number: 20200024138
    Abstract: Phase-changing fuel compositions which can generate hydrogen are provided herein. The compositions can comprise a hydrogen carrier at least partially dissolved in a polar organic solvent. The hydrogen carrier includes ammonia borane and an alkylamine borane such as methylamine borane or methylenediamine bisborane. The hydrogen carrier act as the primary fuel source in the compositions and can be present in an amount of at least 60% by weight, based on the weight of the hydrogen generation composition. The hydrogen generation compositions are a liquid at temperatures of 5° C. or greater or 25° C. or greater. Methods for the production of hydrogen from the hydrogen generation compositions are further disclosed.
    Type: Application
    Filed: April 8, 2019
    Publication date: January 23, 2020
    Inventors: David A. Dixon, Alice DeSimone, Matthew Confer, Hope Burnham, Shane Street, Kent Key
  • Motor control with voltage harmonic shaping
    Patent number: 10483894
    Abstract: A control system for an electric motor (10) comprises a current sensing means (14) arranged to produce a current sensing output indicative of electric current in the motor, current control means (20) arranged to receive a current demand and to control voltages applied to the motor, and correction means (26) arranged to receive the current sensing output and the current demand, and use them to generate a correction signal. The current control means (20) is arranged to receive the correction signal and to use the correction signal to correct the voltages applied to the motor.
    Type: Grant
    Filed: May 16, 2012
    Date of Patent: November 19, 2019
    Assignee: TRW LIMITED
    Inventor: Christoper David Dixon
  • EMERGENCY OXYGEN SYSTEM FOR AIRCRAFT WITH SWITCHING DEVICE AND A METHOD OF OPERATING AN EMERGENCY OXYGEN SYSTEM
    Publication number: 20190321660
    Abstract: An emergency oxygen system for aircraft comprising: a breathing gas supply circuit to be connected upstream to a source of breathing gas and downstream to at least one mask, a flow control valve configured to adjust the flow of breathing gas supplied to the mask, an electronics board configured to control the flow control valve, a power source, a switching device interposed between the power source and the electronics board, the switching device comprising a switch configured to have a first state in which power from the power source is supplied to the electronics board and a second state in which the electronics board is not supplied with power from the power source.
    Type: Application
    Filed: April 18, 2019
    Publication date: October 24, 2019
    Applicant: Zodiac Aerotechnics
    Inventors: Florian Damien Romain Klockiewicz, Charles Christophe Xavir, Matthieu Luc Fromage, Vincent Jean Pierre Marie Gillotin, Stuart David Dixon Walker
  • SYSTEM AND A METHOD FOR DELIVERING BREATHING GAS TO PASSENGERS ON-BOARD AN AIRCRAFT
    Publication number: 20190282839
    Abstract: A system for delivering breathing gas to passengers on-board an aircraft, comprising: a source of breathing gas, at least one face mask for passengers, a reservoir associated with each face mask, a delivery valve for each face mask, the delivery valve being disposed between the source of breathing gas and the reservoir, the reservoir being disposed between the delivery valve and the face mask, a sensor associated with each reservoir and configured to sense a filling of the reservoir, and a controller configured to control the delivery valve in a continuous supply mode to provide a continuous flow of breathing gas to the reservoir and to interrupt the continuous flow of breathing gas when the filing sensed by the sensor is a filling threshold.
    Type: Application
    Filed: March 14, 2019
    Publication date: September 19, 2019
    Inventors: Jürgen Wenzel, Wolfgang Rittner, Jean-Baptiste Philippe Delprat, Vincent Jean Pierre Marie Gillotin, Vincent Gérard Greter, Florian Damien Romain Klockiewicz, Joan Urbain, Stuart David Dixon Walker
  • Rotary encoder
    Patent number: 10365125
    Abstract: A rotary encoder assembly comprises an annular track comprising an alternating pattern of at least two different encoding regions; a first detector and a second detector each arranged to produce a respective alternating output signal as the track of encoding regions rotates about its axis past the detector, the combined values of the two output signals assuming a plurality of unique states with the states changing from one to another as the encoder rotates. A memory stores compensation values, each value being associated with a respective one of the possible state changes that can occur when the combined values of the two output signals change upon movement of the encoder track, and each indicative of an average error in the position at which the corresponding change of state occurs.
    Type: Grant
    Filed: July 10, 2014
    Date of Patent: July 30, 2019
    Assignee: TRW Limited
    Inventors: Christopher David Dixon, Connel Brett Williams
  • DOSED OXYGEN SYSTEMS WITH DELIVERY TUBE ANTI-BLOCKAGE FEATURES AND A METHOD FOR DELIVERING RESPIRATORY GAS
    Publication number: 20190224505
    Abstract: Oxygen-delivery systems are described. The systems may supply emergency respiratory gas on demand to aircraft passengers. To reduce risk of blockage of tubes delivering anti-blocking gas to the face masks worn by the passengers, the systems may be designed to provide a continuous trickle flow of respiratory gas, or one or more anti-blocking pulses of gas, into a delivery tube.
    Type: Application
    Filed: January 22, 2019
    Publication date: July 25, 2019
    Applicant: Zodiac Aerotechnics
    Inventors: Stuart David Dixon Walker, Vincent Gérard Greter
  • ARYL ETHERS AND USES THEREOF
    Publication number: 20190119214
    Abstract: The present disclosure relates to HIF-2? inhibitors and methods of making and using them for treating cancer. Certain compounds were potent in HIF-2? scintillation proximity assay, luciferase assay, and VEGF ELISA assay, and led to tumor size reduction and regression in 786-O xenograft bearing mice in vivo.
    Type: Application
    Filed: October 18, 2018
    Publication date: April 25, 2019
    Inventors: Darryl David Dixon, Jonas Grina, John A. Josey, James P. Rizzi, Stephen T. Schlachter, Eli M. Wallace, Bin Wang, Paul Wehn, Rui Xu, Hanbiao Yang