Patents by Inventor Jason J. MADGE

Jason J. MADGE 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: 10815900
    Abstract: A gas turbine engine comprises a gearbox including a first epicyclic gearbox and a second epicyclic gearbox. The first epicyclic gearbox comprises a first sun gear meshing with the first planet gears and the first planet gears meshing with a first annulus gear. The second epicyclic gearbox comprises a second sun gear meshing with the second planet gears and the second planet gears meshing with a second annulus gear. An input shaft is arranged to drive the first sun gear and a first planet gear carrier is arranged to drive a propulsor. The first and second annulus gears are fixed to a static structure. A first clutch is arranged between the first planet gear carrier and the second planet gear carrier and a second clutch is arranged between the second sun gear and the input shaft. The gearbox is more efficient at cruise conditions.
    Type: Grant
    Filed: May 4, 2018
    Date of Patent: October 27, 2020
    Assignee: ROLLS-ROYCE plc
    Inventor: Jason J. Madge
  • Patent number: 10458274
    Abstract: A gas turbine engine comprises a gearbox comprises a sun gear, an annulus gear, a plurality of planet gears and a carrier. The sun gear meshes with the planet gears and the planet gears mesh with the annulus gear. The planet gear carrier comprising a first ring, a second ring spaced axially from the first ring and a plurality of circumferentially spaced axles extending axially between the first ring and the second ring. Each planet gear is rotatably mounted on a respective one of the axles and the axles are arranged at a first radius. At least one of the first ring and the second ring comprises a metal matrix composite material ring and the metal matrix composite ring comprises a ring of reinforcing fibres and the ring of reinforcing fibres having a second radius greater than the first radius.
    Type: Grant
    Filed: June 16, 2017
    Date of Patent: October 29, 2019
    Assignee: ROLLS-ROYCE plc
    Inventors: Phillip J Doorbar, Jason J Madge
  • Patent number: 10443701
    Abstract: A planetary gear box assembly, comprises a sun gear and a plurality of planet gears in meshing engagement with the sun gear; the planet gears in meshing engagement with a ring gear which encircles the plurality of planet gears, each planet gear mounted for rotation in a planet carrier by means of a bearing pin wherein a bore in the planet carrier for receiving the bearing pin is parallel. The bearing pin includes a small axially tapered section adjacent one or both ends and the assembly further comprises a tapered sleeve configured to interference fit between a radially inner wall surface of the parallel bore and a radially outer surface of the or each axially tapered section.
    Type: Grant
    Filed: September 13, 2017
    Date of Patent: October 15, 2019
    Assignee: ROLLS-ROYCE plc
    Inventors: Jason J Madge, Jonathan P Bradley
  • Patent number: 10422420
    Abstract: Described is a planet carrier rotatable about a carrier axis, comprising: a planet pin for receiving a planet gear, the planet pin having a body with an external surface for receiving a planet gear bearing or planet gear; a carrier having a first axial wall and a second axial wall with the planet pin extending there between along a planet pin axis, wherein each carrier wall includes a planet pin retention feature located on radially inwards of the planet pin axis and engaged with a portion of the planet pin.
    Type: Grant
    Filed: August 18, 2017
    Date of Patent: September 24, 2019
    Assignee: ROLLS-ROYCE PLC
    Inventors: Jason J. Madge, Jonathan P. Bradley
  • Patent number: 10364753
    Abstract: A gas turbine engine comprises a gearbox comprising a sun gear, an annulus gear, a plurality of planet gears and a carrier. The carrier comprises a primary structure and at least one reinforcing structure. The primary structure comprises a first material and the at least one reinforcing structure comprises a second material. The primary structure includes a first ring, a second ring spaced axially from the first ring and a plurality of circumferentially spaced axles extending axially between the first ring and the second ring. Each planet gear is rotatably mounted on a respective one of the axles by a bearing. The reinforcing structure is secured to the primary structure and the reinforcing structure comprises a particulate reinforced material or a fiber reinforced material. The reinforcing structure increases the stiffness of the carrier and reduces the weight of the carrier.
    Type: Grant
    Filed: June 21, 2017
    Date of Patent: July 30, 2019
    Assignee: ROLLS-ROYCE plc
    Inventor: Jason J Madge
  • Patent number: 10358941
    Abstract: A gas turbine engine comprises a gearbox comprising a sun gear, an annulus gear, a plurality of planet gears and a planet gear carrier. The sun gear meshes with the planet gears and the planet gears mesh with the annulus gear. Each planet gear is rotatably mounted in the planet gear carrier. The planet gear carrier comprises a plurality of axles arranged parallel to the axis of the gearbox. The axially spaced ends of each axle are secured to the planet gear carrier. Each planet gear is rotatably mounted on a corresponding one of the axles by a bearing arrangement. Each bearing arrangement comprises a journal bearing and a rolling element bearing and each planet gear is rotatably mounted on a journal bearing and each journal bearing is rotatably mounted on an axle by at least one rolling element bearing.
    Type: Grant
    Filed: June 16, 2017
    Date of Patent: July 23, 2019
    Assignee: ROLLS-ROYCE plc
    Inventor: Jason J Madge
  • Publication number: 20180328289
    Abstract: A gas turbine engine comprises a gearbox including a first epicyclic gearbox and a second epicyclic gearbox. The first epicyclic gearbox comprises a first sun gear meshing with the first planet gears and the first planet gears meshing with a first annulus gear. The second epicyclic gearbox comprises a second sun gear meshing with the second planet gears and the second planet gears meshing with a second annulus gear. An input shaft is arranged to drive the first sun gear and a first planet gear carrier is arranged to drive a propulsor. The first and second annulus gears are fixed to a static structure. A first clutch is arranged between the first planet gear carrier and the second planet gear carrier and a second clutch is arranged between the second sun gear and the input shaft. The gearbox is more efficient at cruise conditions.
    Type: Application
    Filed: May 4, 2018
    Publication date: November 15, 2018
    Applicant: ROLLS-ROYCE plc
    Inventor: Jason J. MADGE
  • Patent number: 9970528
    Abstract: A transmission system for transmitting a change of speed between two rotating shafts, includes a planetary gear box having a sun gear arranged for rotation with a first shaft travelling at a first speed. Planet gears contained within a ring gear are arranged to orbit the sun gear when the sun gear rotates and the ring gear is in a fixed position. Each planet gear is mounted for rotation on a centrifugal carrier. An output carrier includes a body having arms and the arms are each aligned with an axis of rotation of a planet gear and held to the centrifugal carrier by one or more supports extending in a radial plane. An output shaft extends from the body in coaxial alignment with the input shaft. A connector which is stiff in a radial dimension but flexible under torsional load is arranged between the output carrier and the centrifugal carrier.
    Type: Grant
    Filed: February 21, 2017
    Date of Patent: May 15, 2018
    Assignee: ROLLS-ROYCE plc
    Inventors: Jonathan P Bradley, Jason J Madge
  • Patent number: 9951814
    Abstract: A bearing arrangement comprises a rolling element bearing assembly including a bearing cage. The bearing cage comprises an annular cage body having an inner surface defining a coaxial bore. The bearing cage has a plurality of circumferentially spaced pockets and each pocket houses a rotatable rolling element. A first annular skirt extends axially from a radially inner end of a first axial end of the cage body and at least one first support member extends radially and axially from the remote axial end of the first annular skirt to the radially outer end of annular cage body. The bearing cage is hollow and has a high stiffness to weight ratio. The bearing arrangement is particularly suitable for use for a planet gear of a planetary gearbox. The planetary gearbox may be for a gas turbine engine.
    Type: Grant
    Filed: October 27, 2016
    Date of Patent: April 24, 2018
    Assignee: ROLLS-ROYCE plc
    Inventor: Jason J Madge
  • Publication number: 20180100573
    Abstract: A planetary gear box assembly, comprises a sun gear and a plurality of planet gears in meshing engagement with the sun gear; the planet gears in meshing engagement with a ring gear which encircles the plurality of planet gears, each planet gear mounted for rotation in a planet carrier by means of a bearing pin wherein a bore in the planet carrier for receiving the bearing pin is parallel. The bearing pin includes a small axially tapered section adjacent one or both ends and the assembly further comprises a tapered sleeve configured to interference fit between a radially inner wall surface of the parallel bore and a radially outer surface of the or each axially tapered section.
    Type: Application
    Filed: September 13, 2017
    Publication date: April 12, 2018
    Applicant: ROLLS-ROYCE plc
    Inventors: Jason J. MADGE, Jonathan P. BRADLEY
  • Publication number: 20180058571
    Abstract: Described is a planet carrier rotatable about a carrier axis, comprising: a planet pin for receiving a planet gear, the planet pin having a body with an external surface for receiving a planet gear bearing or planet gear; a carrier having a first axial wall and a second axial wall with the planet pin extending there between along a planet pin axis, wherein each carrier wall includes a planet pin retention feature located on radially inwards of the planet pin axis and engaged with a portion of the planet pin.
    Type: Application
    Filed: August 18, 2017
    Publication date: March 1, 2018
    Applicant: ROLLS-ROYCE plc
    Inventors: Jason J. MADGE, Jonathan P. BRADLEY
  • Publication number: 20180016938
    Abstract: A gas turbine engine comprises a gearbox comprises a sun gear, an annulus gear, a plurality of planet gears and a carrier. The sun gear meshes with the planet gears and the planet gears mesh with the annulus gear. The planet gear carrier comprising a first ring, a second ring spaced axially from the first ring and a plurality of circumferentially spaced axles extending axially between the first ring and the second ring. Each planet gear is rotatably mounted on a respective one of the axles and the axles are arranged at a first radius. At least one of the first ring and the second ring comprises a metal matrix composite material ring and the metal matrix composite ring comprises a ring of reinforcing fibres and the ring of reinforcing fibres having a second radius greater than the first radius.
    Type: Application
    Filed: June 16, 2017
    Publication date: January 18, 2018
    Applicant: ROLLS-ROYCE plc
    Inventors: Phillip J. DOORBAR, Jason J. MADGE
  • Publication number: 20180010525
    Abstract: A gas turbine engine comprises a gearbox comprising a sun gear, an annulus gear, a plurality of planet gears and a carrier. The carrier comprises a primary structure and at least one reinforcing structure. The primary structure comprises a first material and the at least one reinforcing structure comprises a second material. The primary structure includes a first ring, a second ring spaced axially from the first ring and a plurality of circumferentially spaced axles extending axially between the first ring and the second ring. Each planet gear is rotatably mounted on a respective one of the axles by a bearing. The reinforcing structure is secured to the primary structure and the reinforcing structure comprises a particulate reinforced material or a fibre reinforced material. The reinforcing structure increases the stiffness of the carrier and reduces the weight of the carrier.
    Type: Application
    Filed: June 21, 2017
    Publication date: January 11, 2018
    Applicant: ROLLS-ROYCE PLC
    Inventor: Jason J. MADGE
  • Publication number: 20180003079
    Abstract: A gas turbine engine comprises a gearbox comprising a sun gear, an annulus gear, a plurality of planet gears and a planet gear carrier. The sun gear meshes with the planet gears and the planet gears mesh with the annulus gear. Each planet gear is rotatably mounted in the planet gear carrier. The planet gear carrier comprises a plurality of axles arranged parallel to the axis of the gearbox. The axially spaced ends of each axle are secured to the planet gear carrier. Each planet gear is rotatably mounted on a corresponding one of the axles by a bearing arrangement. Each bearing arrangement comprises a journal bearing and a rolling element bearing and each planet gear is rotatably mounted on a journal bearing and each journal bearing is rotatably mounted on an axle by at least one rolling element bearing.
    Type: Application
    Filed: June 16, 2017
    Publication date: January 4, 2018
    Applicant: ROLLS-ROYCE plc
    Inventor: Jason J MADGE
  • Publication number: 20170261096
    Abstract: A transmission system for transmitting a change of speed between two rotating shafts, includes a planetary gear box having a sun gear arranged for rotation with a first shaft travelling at a first speed. Planet gears contained within a ring gear are arranged to orbit the sun gear when the sun gear rotates and the ring gear is in a fixed position. Each planet gear is mounted for rotation on a centrifugal carrier. An output carrier includes a body having arms and the arms are each aligned with an axis of rotation of a planet gear and held to the centrifugal carrier by one or more supports extending in a radial plane. An output shaft extends from the body in coaxial alignment with the input shaft. A connector which is stiff in a radial dimension but flexible under torsional load is arranged between the output carrier and the centrifugal carrier.
    Type: Application
    Filed: February 21, 2017
    Publication date: September 14, 2017
    Applicant: ROLLS-ROYCE PLC
    Inventors: Jonathan P. BRADLEY, Jason J. MADGE
  • Publication number: 20170130774
    Abstract: A bearing arrangement comprises a rolling element bearing assembly including a bearing cage. The bearing cage comprises an annular cage body having an inner surface defining a coaxial bore. The bearing cage has a plurality of circumferentially spaced pockets and each pocket houses a rotatable rolling element. A first annular skirt extends axially from a radially inner end of a first axial end of the cage body and at least one first support member extends radially and axially from the remote axial end of the first annular skirt to the radially outer end of annular cage body. The bearing cage is hollow and has a high stiffness to weight ratio. The bearing arrangement is particularly suitable for use for a planet gear of a planetary gearbox. The planetary gearbox may be for a gas turbine engine.
    Type: Application
    Filed: October 27, 2016
    Publication date: May 11, 2017
    Applicant: ROLLS-ROYCE plc
    Inventor: Jason J. MADGE