Patents by Inventor Graham Frank Howarth
Graham Frank Howarth 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).
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Patent number: 11885264Abstract: An acoustic core has a plurality of cell walls formed of an additive-manufacturing material and a resonant space defined by the plurality of cell walls. At least some of the resonant cells have sound-attenuating protuberances formed of an excess amount of the additive-manufacturing material having been intentionally introduced to the cell walls and protruding into the resonant space with a semi-random orientation and/or size.Type: GrantFiled: May 28, 2021Date of Patent: January 30, 2024Assignee: General Electric CompanyInventors: Wendy Wenling Lin, Shanmugam Murugappan, Robert William Davidoff, Graham Frank Howarth, Andrew Michael Roach
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Patent number: 11434819Abstract: An acoustic liner may include an acoustic core having an array of resonant cells, and an acoustic screen disposed across the array of resonant cells. The resonant cells include a plurality of cell walls and a resonant space defined by the plurality of cell walls. The acoustic core may include a folded acoustic core. Additionally, or in the alternative, at least some of the resonant cells may include an oblique polyhedral cellular structure and/or a multitude of sound-attenuating protuberances. The acoustic screen may include a reticulate membrane and a support lattice.Type: GrantFiled: March 29, 2019Date of Patent: September 6, 2022Assignees: GENERAL ELECTRIC COMPANY, MRA SYSTEMS, LLCInventors: Shanmugam Murugappan, Michael Moses Martinez, Egbert Geertsema, Rudramuni Kariveerappa Majjigi, Richard David Cedar, Wendy Wenling Lin, Robert William Davidoff, David Patrick Calder, Graham Frank Howarth
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Publication number: 20210324794Abstract: An acoustic core has a plurality of cell walls formed of an additive-manufacturing material and a resonant space defined by the plurality of cell walls. At least some of the resonant cells have a multitude of sound-attenuating protuberances formed of the additive-manufacturing material of the cell walls protruding into the resonant space with a random or semi-random orientation and/or size. The sound-attenuating protuberances may be formed by orienting an additive-manufacturing tool with respect to a toolpath to form a contour of a workpart, in which the toolpath includes a plurality of overlapping toolpath passes configured so as to intentionally introduce an amount of additive-manufacturing material to the workpart that exceeds a domain occupied by the contour. As the amount of additive-manufacturing material intentionally introduced exceeds the domain occupied by the contour, a portion of the additive-manufacturing material may incidentally form the plurality of sound-attenuating protuberances.Type: ApplicationFiled: May 28, 2021Publication date: October 21, 2021Inventors: Wendy Wenling Lin, Shanmugam Murugappan, Robert William Davidoff, Graham Frank Howarth, Andrew Michael Roach
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Patent number: 11149686Abstract: A thrust reverser assembly for a gas turbine engine including a core engine, a nacelle surrounding at least a portion of the core engine defining a bypass duct between the nacelle and the core engine where an outer door movable between a stowed position and a deployed position extends outwards from the nacelle and a blocker door movable between a stowed position and a deployed position extends into an airflow conduit defined by the bypass duct to deflect air outwards.Type: GrantFiled: March 25, 2019Date of Patent: October 19, 2021Assignee: MRA SYSTEMS, LLCInventors: David Patrick Calder, Graham Frank Howarth, Andrew Michael Roach, Timothy Robert Beasman
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Patent number: 11047304Abstract: An acoustic core has a plurality of cell walls formed of an additive-manufacturing material and a resonant space defined by the plurality of cell walls. At least some of the resonant cells have a multitude of sound-attenuating protuberances formed of the additive-manufacturing material of the cell walls protruding into the resonant space with a random or semi-random orientation and/or size. The sound-attenuating protuberances may be formed by orienting an additive-manufacturing tool with respect to a toolpath to form a contour of a workpart, in which the toolpath includes a plurality of overlapping toolpath passes configured so as to intentionally introduce an amount of additive-manufacturing material to the workpart that exceeds a domain occupied by the contour. As the amount of additive-manufacturing material intentionally introduced exceeds the domain occupied by the contour, a portion of the additive-manufacturing material may incidentally form the plurality of sound-attenuating protuberances.Type: GrantFiled: August 8, 2018Date of Patent: June 29, 2021Assignee: General Electric CompanyInventors: Wendy Wenling Lin, Shanmugam Murugappan, Robert William Davidoff, Graham Frank Howarth, Andrew Michael Roach
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Patent number: 10995699Abstract: A thrust reverser cascade can include a peripheral frame having at least one side. At least one plate can be mounted to the at least one side and have a plurality of spaced grooves. In addition, a plurality of vanes can include corresponding terminal ends positioned in the plurality of spaced grooves.Type: GrantFiled: February 19, 2018Date of Patent: May 4, 2021Assignee: MRA SYSTEMS, LLC.Inventors: Andrew Michael Roach, Graham Frank Howarth, David Patrick Calder
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Patent number: 10971128Abstract: An acoustic liner (20) with perforation (30) and method of constructing (100) an acoustic liner including forming perforations in the facing sheet by grit blasting (104) the facing sheet and mounting (106) the facing sheet to one side of a support layer having a set of partitioned cavities wherein the facing sheet closes an open face of the cavities except for the perforations to form a set of acoustic resonator cells.Type: GrantFiled: April 10, 2015Date of Patent: April 6, 2021Assignee: MRA SYSTEMS, LLCInventors: Andrew Michael Roach, Graham Frank Howarth, Steven Thomas Davies, Richard David Cedar, Michael Moses Martinez, Timothy Richard Depuy
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Patent number: 10961913Abstract: An acoustic liner for a turbine engine, the acoustic liner includes a support layer that includes a set of partitioned cavities with open faces, a facing sheet operably coupled to the support layer such that the facing sheet overlies and closes the open faces, a set of perforations located in the facing sheet and in fluid communication with a corresponding one of the cavities to form a set of acoustic resonators, and at least a subset of the perforations have an axially-oriented, relative to the axial flow path, inlet.Type: GrantFiled: March 10, 2015Date of Patent: March 30, 2021Assignee: MRA SYSTEMS, LLCInventors: Graham Frank Howarth, Andrew Michael Roach, Steven Thomas Davies, Richard David Cedar, Michael Moses Martinez, Timothy Richard DePuy
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Patent number: 10876479Abstract: An acoustic liner can include a support layer having a set of partitioned cavities with open faces, a first facing sheet and second facing sheet both having perforations and operably coupled to the support layer such that the facing sheets overlie and close the open faces, and an aerogel layer operably coupled to the second facing sheet.Type: GrantFiled: February 24, 2017Date of Patent: December 29, 2020Assignee: MRA SYSTEMS, LLC.Inventors: Andrew Michael Roach, David Patrick Calder, Graham Frank Howarth
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Patent number: 10851734Abstract: A thrust reverser assembly for high-bypass turbofan engine. The thrust reverser assembly includes a translating cowl mounted to a nacelle of an engine. The thrust reverser assembly includes blocker doors axially guided adjacent first ends thereof by a fixed structure and pivotally and slidably connected along lengths thereof to an inner wall of the translating cowl so that translation of the translating cowl in the aft direction causes the blocker door to move from a stowed position to a deployed position. The thrust reverser assembly includes a stop disposed on the core engine or on the blocker door, receiving the load from the high pressure airflow, otherwise borne by an actuation system when deploying the translating cowl and blocker door.Type: GrantFiled: September 9, 2015Date of Patent: December 1, 2020Assignee: MRA SYSTEMS, LLC.Inventors: Timothy Robert Beasman, Andrew Michael Roach, Graham Frank Howarth
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Patent number: 10851713Abstract: An acoustic liner can include a support layer with a set of partitioned cavities defining a set of cells with open faces, a first facing sheet operably coupled to the support layer such that the first facing sheet overlies and closes the open faces, and a set of internal separator structures within at least some of the set of partitioned cavities.Type: GrantFiled: August 29, 2017Date of Patent: December 1, 2020Assignee: MRA SYSTEMS, LLC.Inventors: Andrew Michael Roach, Graham Frank Howarth
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Patent number: 10837368Abstract: An acoustic liner can comprise a support layer including a set of partitioned cavities defining a set of cells with open faces, as well as a first and second facing sheet operably coupled to the support layer that overlie and close the open faces. A set of aerogel fillings can be provided within at least some of the set of cells.Type: GrantFiled: February 24, 2017Date of Patent: November 17, 2020Assignee: MRA SYSTEMS, LLCInventors: Graham Frank Howarth, David Patrick Calder, Andrew Michael Roach
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Publication number: 20200309028Abstract: An acoustic liner may include an acoustic core having an array of resonant cells, and an acoustic screen disposed across the array of resonant cells. The resonant cells include a plurality of cell walls and a resonant space defined by the plurality of cell walls. The acoustic core may include a folded acoustic core. Additionally, or in the alternative, at least some of the resonant cells may include an oblique polyhedral cellular structure and/or a multitude of sound-attenuating protuberances. The acoustic screen may include a reticulate membrane and a support lattice.Type: ApplicationFiled: March 29, 2019Publication date: October 1, 2020Inventors: Shanmugam Murugappan, Michael Moses Martinez, Egbert Geertsema, Rudramuni Kariveerappa Majjigi, Richard David Cedar, Wendy Wenling Lin, Robert William Davidoff, David Patrick Calder, Graham Frank Howarth
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Patent number: 10578055Abstract: A thrust reverser assembly for a turbine engine can include a core engine surrounded by a nacelle. A bypass duct can be formed in the space between the core engine and the nacelle. A blocker door can be movable to a deployed position extending into the bypass duct. A stop can be provided on the core engine to abut and support force applied to the deployed blocker door. The stop can have an airfoil shape.Type: GrantFiled: August 10, 2017Date of Patent: March 3, 2020Assignee: MRA Systems, LLCInventors: David Patrick Calder, Keith E J Blodgett, Graham Frank Howarth, Andrew Michael Roach
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Patent number: 10563615Abstract: A gas turbine engine and thrust reverser assembly having a set of outer doors movable between a stowed position and a deployed position, where the set of outer doors extends outwards from the nacelle and a set of blocker doors movable between a stowed position and an deployed position, where the set of blocker door extends into an air flow conduit defined by the bypass duct to deflect air outwards.Type: GrantFiled: May 9, 2016Date of Patent: February 18, 2020Assignee: MRA SYSTEMS, LLCInventors: Graham Frank Howarth, Andrew Michael Roach, Timothy Robert Beasman
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Patent number: 10563578Abstract: An acoustic liner for a turbine engine, the acoustic liner includes a support layer that includes a set of partitioned cavities with open faces, a perforated sheet that includes a set of perforations with corresponding inlets, the perforated sheet supported by the support layer such that perforations are in overlying relationship with the open faces to form paired perforations and cavities that define acoustic resonator cells, and a coating applied to the perforated sheet.Type: GrantFiled: February 18, 2015Date of Patent: February 18, 2020Assignee: MRA Systems, LLCInventors: Andrew Michael Roach, Richard David Cedar, Steven Thomas Davies, Timothy Richard Depuy, Graham Frank Howarth, Michael Moses Martinez
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Publication number: 20200049068Abstract: An acoustic core has a plurality of cell walls formed of an additive-manufacturing material and a resonant space defined by the plurality of cell walls. At least some of the resonant cells have a multitude of sound-attenuating protuberances formed of the additive-manufacturing material of the cell walls protruding into the resonant space with a random or semi-random orientation and/or size. The sound-attenuating protuberances may be formed by orienting an additive-manufacturing tool with respect to a toolpath to form a contour of a workpart, in which the toolpath includes a plurality of overlapping toolpath passes configured so as to intentionally introduce an amount of additive-manufacturing material to the workpart that exceeds a domain occupied by the contour. As the amount of additive-manufacturing material intentionally introduced exceeds the domain occupied by the contour, a portion of the additive-manufacturing material may incidentally form the plurality of sound-attenuating protuberances.Type: ApplicationFiled: August 8, 2018Publication date: February 13, 2020Inventors: Wendy Wenling Lin, Shanmugam Murugappan, Robert William Davidoff, Graham Frank Howarth, Andrew Michael Roach
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Patent number: 10550797Abstract: A turbine engine having an engine core, an inner cowl radially surrounding the engine core, an outer cowl radially surrounding the inner cowl and spaced from the inner cowl to form an annular passage between the inner and outer cowls that defines a nozzle, at least one control surface provided on the inner cowl and movable between a retracted position, where the nozzle has a first cross-sectional area, and an extended position where the nozzle has a second cross-sectional area that is less than the first cross-sectional area and an actuator operably coupled to the control surface and configured to move the control surface to control the cross-sectional area of the nozzle.Type: GrantFiled: February 11, 2015Date of Patent: February 4, 2020Assignee: MRA Systems, LLCInventors: Graham Frank Howarth, David Patrick Calder
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Publication number: 20200025136Abstract: A thrust reverser assembly for a gas turbine engine including a core engine, a nacelle surrounding at least a portion of the core engine defining a bypass duct between the nacelle and the core engine where an outer door movable between a stowed position and a deployed position extends outwards from the nacelle and a blocker door movable between a stowed position and a deployed position extends into an airflow conduit defined by the bypass duct to deflect air outwards.Type: ApplicationFiled: March 25, 2019Publication date: January 23, 2020Inventors: David Patrick Calder, Graham Frank Howarth, Andrew Michael Roach, Timothy Robert Beasman
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Publication number: 20190257268Abstract: A thrust reverser cascade can include a peripheral frame having at least one side. At least one plate can be mounted to the at least one side and have a plurality of spaced grooves. In addition, a plurality of vanes can include corresponding terminal ends positioned in the plurality of spaced grooves.Type: ApplicationFiled: February 19, 2018Publication date: August 22, 2019Inventors: Andrew Michael Roach, Graham Frank Howarth, David Patrick Calder