Patents by Inventor Robert John Bonner Flaxman

Robert John Bonner Flaxman 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).

  • Patent number: 11255430
    Abstract: Some embodiments are directed to a gearing assembly including a rotary input member, a rotary output member and a gearing arrangement between the input member and the output member selectively engageable to effect a driving engagement between the input member and the output member through at least a first torque connection having a first gear ratio and a second torque connection having a second gear ratio. One of the rotary input member and the rotary output member includes a first shaft and the first torque connection includes a first dog clutch including a dog hub having a hub set of teeth and a surrounding dog ring including a ring set of teeth. The hub and ring sets of teeth are radially projecting and mutually engageable. The dog hub is mounted on the first shaft so as to allow axial movement of the dog hub relative to the shaft.
    Type: Grant
    Filed: January 16, 2019
    Date of Patent: February 22, 2022
    Assignee: QINETIQ LIMITED
    Inventors: Robert William Thompson, Robert John Bonner Flaxman
  • Publication number: 20210354540
    Abstract: Some embodiments are directed to a drive configuration for a skid-steered vehicle that has a pair of traction motors for rotationally driving opposite outputs of the drive configuration. The traction motors are operatively connected to the outputs via respective gearing arrangements for selectively varying gear reduction between each of the traction motors and the corresponding output. The drive configuration also has a steer differential in a torque connection with the first and second outputs of the drive configuration. The drive configuration additional has a steer motor operatively connected to the steer differential for selectively varying the rotational speed of the first and second outputs in use. Also, the traction and steer motors define a volume in which the gearing arrangements and steering differential are at least partially located.
    Type: Application
    Filed: July 30, 2021
    Publication date: November 18, 2021
    Inventor: Robert John Bonner FLAXMAN
  • Patent number: 11110784
    Abstract: Some embodiments are directed to a drive configuration for a skid-steered vehicle that has a pair of traction motors for rotationally driving opposite outputs of the drive configuration. The traction motors are operatively connected to the outputs via respective gearing arrangements for selectively varying gear reduction between each of the traction motors and the corresponding output. The drive configuration also has a steer differential in a torque connection with the first and second outputs of the drive configuration. The drive configuration additional has a steer motor operatively connected to the steer differential for selectively varying the rotational speed of the first and second outputs in use. Also, the traction and steer motors define a volume in which the gearing arrangements and steering differential are at least partially located.
    Type: Grant
    Filed: September 1, 2017
    Date of Patent: September 7, 2021
    Assignee: QINETIQ LIMITED
    Inventor: Robert John Bonner Flaxman
  • Publication number: 20210071758
    Abstract: The invention provides a gearing assembly (5) comprising a rotary input member (1b), a rotary output member (3) and a gearing arrangement (52) between the input member and the output member selectively engageable to effect a driving engagement between the input member and the output member through at least a first torque connection having a first gear ratio and a second torque connection having a second gear ratio.
    Type: Application
    Filed: January 16, 2019
    Publication date: March 11, 2021
    Inventors: Robert William THOMPSON, Robert John Bonner FLAXMAN
  • Patent number: 10836427
    Abstract: Some embodiments are directed to a drive configuration for a skid steered vehicle includes first and second torque outputs coupled by a differential and in a torque connection with first and second electric motors, the differential being configured to mechanically transfer power across itself; and a mechanical power splitter having a first torque transfer feature in a torque connection with a combustion engine, a second torque transfer feature in a torque connection with a respective additional electric motor and a third torque transfer feature in a torque connection with at least one of the first and second torque outputs of the drive configuration, wherein torque output from the or each the mechanical power splitter in use is dependent on torques generated by the combustion engine and the associated additional electric motor.
    Type: Grant
    Filed: March 16, 2017
    Date of Patent: November 17, 2020
    Assignee: QINETIQ LIMITED
    Inventor: Robert John Bonner Flaxman
  • Publication number: 20200331526
    Abstract: Some embodiments are directed to a drive configuration for a skid steered vehicle includes first and second torque outputs coupled by a differential and in a torque connection with first and second electric motors, the differential being configured to mechanically transfer power across itself; and a mechanical power splitter having a first torque transfer feature in a torque connection with a combustion engine, a second torque transfer feature in a torque connection with a respective additional electric motor, and a third torque transfer feature in a torque connection with at least one of the first and second torque outputs of the drive configuration, wherein torque output from the or each the mechanical power splitter in use is dependent on torques generated by the combustion engine and the associated additional electric motor.
    Type: Application
    Filed: March 16, 2017
    Publication date: October 22, 2020
    Inventor: Robert John Bonner FLAXMAN
  • Publication number: 20200317046
    Abstract: Some embodiments are directed to a differential including: a left-side planetary gear set having a sun gear configured to receive rotational drive input from a drive source, a ring gear in a torque connection with an electric motor and a carrier gear configured to be operatively coupled with a left-side vehicle drive member in a torque connection; a right-side planetary gear set having a sun gear configured to receive rotational drive input from the drive source, a ring gear in a torque connection with the electric motor and a carrier gear configured to be operatively coupled with a right-side vehicle drive member in a torque connection; wherein the sun gears of the left and right side planetary gear sets are rotationally fixed relative to each other and, in use, the amount of power transferred between the drive source and each of the respective drive members can be selectively controlled.
    Type: Application
    Filed: March 16, 2017
    Publication date: October 8, 2020
    Inventor: Robert John Bonner FLAXMAN
  • Publication number: 20200070638
    Abstract: Some embodiments are directed to a drive configuration for a skid-steered vehicle that has a pair of traction motors for rotationally driving opposite outputs of the drive configuration. The traction motors are operatively connected to the outputs via respective gearing arrangements for selectively varying gear reduction between each of the traction motors and the corresponding output. The drive configuration also has a steer differential in a torque connection with the first and second outputs of the drive configuration. The drive configuration additional has a steer motor operatively connected to the steer differential for selectively varying the rotational speed of the first and second outputs in use. Also, the traction and steer motors define a volume in which the gearing arrangements and steering differential are at least partially located.
    Type: Application
    Filed: September 1, 2017
    Publication date: March 5, 2020
    Applicant: QinetiQ Limited
    Inventor: Robert John Bonner FLAXMAN
  • Patent number: 10374491
    Abstract: Some embodiments are directed to an electric motor that includes a stator including a plurality of circumferentially distributed drive elements for causing an electromagnetic driving force to be applied to a rotor of the electric motor in use. Each drive element includes a wire extending around a metal core to define a plurality of coils for magnetizing the metal core when current flows in the coils. At least one space exists between the metal core of each respective drive element and the coils around it. A cooling device is provided for transferring heat away from the drive elements. Each drive element further includes a heat conductor including a plurality of mutually electrically isolated metallic elements located in the or each respective space between the metal core thereof and the coils around it, for transferring heat from the coils to the cooling device.
    Type: Grant
    Filed: May 22, 2015
    Date of Patent: August 6, 2019
    Assignee: QINETIQ LIMITED
    Inventor: Robert John Bonner Flaxman
  • Patent number: 10221938
    Abstract: Some embodiments are directed to an apparatus for managing fluid flow in a vehicle, that includes an epicyclic gear set having first, and second inputs configured to receive rotational drive input from a torque output feature of a powertrain and a rotary actuator respectively. A pump driver is provided for driving a fluid pump, the pump driver being configured to receive rotational drive input from an output of the epicyclic gear set. A controller is configured to determine information corresponding to the rotational speed of the torque output feature using information generated by a rotational speed sensor and based on this control the rotary actuator, such that the pump driver is caused to rotate at substantially a pre-specified speed.
    Type: Grant
    Filed: May 22, 2015
    Date of Patent: March 5, 2019
    Assignee: QINETIQ LIMITED
    Inventor: Robert John Bonner Flaxman
  • Patent number: 9975576
    Abstract: Some embodiments are directed to a controlled differential adapted to couple two shafts and steer input, such as those provided in a drive configuration for a skid steered vehicle, the controlled differential including a pair of planet carriers arranged to turn with respective shafts; a pair of ring gears interconnected by a cross-shaft such that the ring gears rotate in common; planet gears and a pair of sun gears, the sun gears being coupled to at least one steer motor to enable rotation of the sun gears in mutually opposite senses upon input from the steer motor.
    Type: Grant
    Filed: April 25, 2014
    Date of Patent: May 22, 2018
    Assignee: QINETIQ LIMITED
    Inventor: Robert John Bonner Flaxman
  • Publication number: 20170097087
    Abstract: Apparatus for managing fluid flow in a vehicle, comprising: an epicylic gear set having first and second inputs configured to receive rotational drive input from a torque output feature of a powertrain and a rotary actuator respectively; a pump driver for driving a fluid pump, the pump driver configured to receive rotational drive input from an output of the epicylic gear set; and a controller configured to determine information corresponding to the rotational speed of the torque output feature using information generated by a rotational speed sensor and based on this control the rotary actuator such that the pump driver is caused to rotate at substantially a pre-specified speed.
    Type: Application
    Filed: May 22, 2015
    Publication date: April 6, 2017
    Inventor: Robert John Bonner FLAXMAN
  • Publication number: 20170085157
    Abstract: An electric motor comprising: a stator comprising a plurality of circumferentially distributed drive elements for causing an electromagnetic driving force to be applied to a rotor of the electric motor in use, wherein each drive element comprises a wire extending around a metal core to define a plurality of coils for magnetizing the metal core when current flows in the coils, and wherein at least one space exists between the metal core of each respective drive element and the coils around it; and cooling means for transferring heat away from the drive elements; wherein each said drive element further comprises a heat conductor comprising a plurality of mutually electrically isolated metallic elements located in the or each respective space between the metal core thereof and the coils around it, for transferring heat from the coils to the cooling means.
    Type: Application
    Filed: May 22, 2015
    Publication date: March 23, 2017
    Inventor: Robert John Bonner FLAXMAN
  • Publication number: 20160107686
    Abstract: A controlled differential adapted to couple two shafts and steer input, such as those provided in a drive configuration for a skid steered vehicle, the controlled differential comprising: a pair of planet carriers arranged to turn with respective shafts; a pair of ring gears interconnected by a cross-shaft such that the ring gears rotate in common; planet gears and a pair of sun gears, the sun gears being coupled to at least one steer motor to enable rotation of the sun gears in mutually opposite senses upon input from the steer motor.
    Type: Application
    Filed: April 25, 2014
    Publication date: April 21, 2016
    Inventor: Robert John Bonner FLAXMAN
  • Patent number: 7491149
    Abstract: A fluid display arrangement is disclosed for a rolling-traction continuously-variable ratio transmission unit in which drive is transmitted from one race to another by at least one rotating roller whose outer circumference engages the races, the fluid supply arrangement comprising a shroud mounted in proximity to the roller and a fluid supply conduit, and being characterised in that the shroud has an inner surface providing a circumferential portion adjacent the roller's outer circumference and two radially extending portions adjacent respective flanks of the roller, a fluid receiving chamber being thereby defined between the roller and the shroud, and the fluid supply conduit being arranged to deliver fluid into the fluid receiving chamber.
    Type: Grant
    Filed: January 24, 2003
    Date of Patent: February 17, 2009
    Assignee: Torotrak (Development) Limited
    Inventors: Christopher John Greenwood, Robert John Bonner Flaxman, Graham Briffett, Ian MacPherson