Patents by Inventor Nathan Evans
Nathan Evans 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: 10900369Abstract: An aspirating face seal between high and low pressure regions of a turbomachine at a juncture between rotatable and non-rotatable members of turbomachine includes gas bearing rotatable and non-rotatable face surfaces. Primary and starter seal teeth and optional deflector seal tooth are mounted on seal teeth carrier on rotatable member. Non-rotatable face surface is mounted on an annular slider on the non-rotatable member. A pull-off biasing means urges the annular slider away from the rotatable member and the non-rotatable face surface away from the rotatable surface. A secondary seal is in sealing engagement with the annular slider in the low pressure region and the pull-off biasing means is located radially outwardly of the annular slider in the high pressure region. Biasing means may include coil springs within spring chambers of circumferentially spaced cartridges. Tongues extend inwardly from spring chambers into grooves in slider.Type: GrantFiled: September 12, 2018Date of Patent: January 26, 2021Assignee: General Electric CompanyInventors: Nathan Evan McCurdy Gibson, Christopher Jon Potokar, Hariharan Manickavasagam Sarojini, Arnab Sen, Bikramjit Chatterjee
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Patent number: 10895324Abstract: A seal assembly for a rotary machine includes a seal bearing face that opposes a rotating component of the machine and a slide device coupled with the seal bearing face. The slide device axially moves toward the rotating component responsive to pressurization of the rotary machine. The slide device includes cross-over ports and the seal bearing includes feed ports. The feed ports extend through the seal bearing face to form aerostatic portions of a film bearing between the seal bearing face and the rotating component. The seal bearing face and/or the rotating component has a non-planar surface that, during rotating motion of the rotating component relative to the face of the seal bearing face, forms aerodynamic portions of the film bearing.Type: GrantFiled: November 27, 2018Date of Patent: January 19, 2021Assignee: GENERAL ELECTRIC COMPANYInventors: Quang Tue Nguyen Tran, Nathan Evan McCurdy Gibson, Rodrigo Rodriguez Erdmenger, Christopher Edward Wolfe, Steven Douglas Johnson, Antonio Guijarro Valencia
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Patent number: 10890082Abstract: An aspirating face seal between high and low pressure regions of a turbomachine at a juncture between rotatable and non-rotatable members of turbomachine includes gas bearing rotatable and non-rotatable face surfaces. A starter seal tooth and optional deflector seal tooth are mounted on a seal teeth carrier on the rotatable member. The primary seal tooth and non-rotatable face surface are mounted on an annular slider on the non-rotatable member. A pull-off biasing means urges the annular slider away from the rotatable member and the non-rotatable face surface away from the rotatable surface. A secondary seal is in sealing engagement with the annular slider in the low-pressure region and the pull-off biasing means is located radially outwardly of the annular slider in the high pressure region.Type: GrantFiled: April 28, 2017Date of Patent: January 12, 2021Assignee: GENERAL ELECTRIC COMPANYInventors: Narendra Anand Hardikar, Nathan Evan McCurdy Gibson
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Publication number: 20200375430Abstract: A dishwashing apparatus may include a sump. The sump may include a sump pan configured to couple with a wash chamber of the dishwashing apparatus. The sump may include a sump well coupled to the sump pan and configured to collect the liquid from the sump pan. The sump well may include a well inlet in communication with the sump pan. The sump pan may convey the liquid to the well inlet. A recirculation port extending through a first wall of the sump well. A drain port may extend through a second wall of the sump well. The second wall defines a bottom of the sump well. The dishwashing apparatus may include a controller. The controller may monitor electrical characteristics of a pump. The controller may provide a notification if fluid is not flowing through the pump.Type: ApplicationFiled: June 3, 2020Publication date: December 3, 2020Inventors: Brock Mueggenborg, Jason Heintz, Marvin Harris York, Nathan Evans
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Publication number: 20200360552Abstract: A method is provided for reducing a duration of an inactivate step of a decontamination process of contents within a chamber of a container. The method includes at least one of directing air in contact with a catalyst to reduce a level of hydrogen peroxide (H2O2) in the air during the inactivate step and/or altering a temperature of air within the chamber during the inactivate step. A system is also provided for performing one or more steps of the method. The system includes the container defining the chamber; the catalyst; a component configured to direct air through the catalyst; and a processor configured to cause components of the system to perform one or more steps of the method.Type: ApplicationFiled: June 12, 2020Publication date: November 19, 2020Inventors: Milton Ford Baker, JR., Steven F. Brooker, Robert W. Dotterer, David N. Figel, Brian K. Haught, Nathan Evan Huddleston, Stephen Charles Keiser
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Patent number: 10823184Abstract: A turbine engine with a stator having axially spaced first and second structural elements along with a rotor and a face seal between the rotor and the stator including a non-rotating gas bearing face coupled to the first and second structural elements, and a rotating gas bearing face coupled to the rotor and confronting the non-rotating gas bearing surface. Introducing airflow to one or multiple parts of the seal.Type: GrantFiled: July 28, 2016Date of Patent: November 3, 2020Assignee: General Electric CompanyInventors: Arnab Sen, Mohamed Musthafa Thoppil, Nathan Evan McCurdy Gibson
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Patent number: 10823078Abstract: Systems and methods for starting a powerplant are provided. In one exemplary aspect, a starting system of a powerplant includes one or more features that allow for the powerplant to be started electrically with a burst of electrical power and without deriving electrical power from an offboard power source or a relatively heavy onboard energy storage device.Type: GrantFiled: June 28, 2017Date of Patent: November 3, 2020Assignee: General Electric CompanyInventors: Nathan Evan McCurdy Gibson, Christopher James Kroger, Sean Christopher Binion, Scott Douglas Waun
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Patent number: 10781709Abstract: A turbine engine includes an engine core defining a higher pressure region and a lower pressure region. A seal can fluidly separate the higher pressure region from the lower pressure region and be movably mounted to a component within the turbine engine, where a side of the seal can confront the component.Type: GrantFiled: January 9, 2018Date of Patent: September 22, 2020Assignee: General Electric CompanyInventors: Arnab Sen, Jeffrey Douglas Rambo, Rajesh Kumar, Nathan Evan McCurdy Gibson, Robert Proctor, Bhaskar Nanda Mondal, Steven Douglas Johnson
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Patent number: 10774874Abstract: A bearing assembly including a body defining an outer surface, an inner surface, and an aft surface is generally provided. A first inlet opening is defined through the outer surface in fluid communication with a first internal passage defined by a first internal wall. The first internal passage is in fluid communication with a first outlet opening defined through the inner surface. A second inlet opening is defined through the inner surface in fluid communication with a second internal passage defined by a second internal wall. The second internal passage is in fluid communication with a second outlet opening defined through the aft surface.Type: GrantFiled: August 6, 2018Date of Patent: September 15, 2020Assignee: General Electric CompanyInventors: Sean Christopher Binion, Steven Douglas Johnson, David Vickery Parker, Stephen Joseph Waymeyer, Nathan Evan McCurdy Gibson
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Patent number: 10677312Abstract: Friction shaft damper includes springy projections pressing against inside surface of a portion of rotor such as drive shaft with spring force. Central mass may be positioned inside surface of drive shaft by projections extending outwardly from central mass and slideably engaging inside surface of drive shaft. Enlarged section or chamber of shaft may surround and axially trap damper. Axially spaced apart sets of springy fingers may position mass inside shaft and radially inner ends of fingers may be secured to mass and radially outer ends of fingers may be positioned and free to slide along inside surface of shaft. Two axially spaced apart annular deflection limiters may be placed around mass with small clearances C between deflection limiters and inside surface of shaft. Damper may be a multi-lobed wave spring having multi-lobed rim attached to mass by struts. Damper may be multi-lobed wave spring with crests.Type: GrantFiled: February 15, 2018Date of Patent: June 9, 2020Assignee: General Electric CompanyInventors: Richard Alan Wesling, Nathan Evan McCurdy Gibson
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Publication number: 20200166143Abstract: A seal assembly for a rotary machine includes a seal bearing face that opposes a rotating component of the machine and a slide device coupled with the seal bearing face. The slide device axially moves toward the rotating component responsive to pressurization of the rotary machine. The slide device includes cross-over ports and the seal bearing includes feed ports. The feed ports extend through the seal bearing face to form aerostatic portions of a film bearing between the seal bearing face and the rotating component. The seal bearing face and/or the rotating component has a non-planar surface that, during rotating motion of the rotating component relative to the face of the seal bearing face, forms aerodynamic portions of the film bearing.Type: ApplicationFiled: November 27, 2018Publication date: May 28, 2020Inventors: Quang Tue Nguyen Tran, Nathan Evan McCurdy Gibson, Rodrigo Rodriguez Erdmenger, Christopher Edward Wolfe, Steven Douglas Johnson, Antonio Guijarro Valencia
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Publication number: 20200166142Abstract: A seal assembly for a rotary machine is positioned between a rotating component and a stationary component of the rotary machine. The seal assembly includes a seal bearing face that opposes the rotating component and a slide device. The slide device is positioned between different fluid pressure volumes in the rotary machine. The slide device axially moves toward the rotating component responsive to pressurization of the rotary machine. The slide device includes cross-over ports and the seal bearing face includes feed ports. The feed ports extend through the seal bearing face to form an aerostatic portion of a film bearing between the seal bearing face and the rotating component. The seal bearing face and/or the rotating component is a non-planar surface that, during rotating motion of the rotating component, forms an aerodynamic portion of the film bearing between the seal bearing face and the rotating component.Type: ApplicationFiled: November 27, 2018Publication date: May 28, 2020Inventors: Rahul Anil Bidkar, Christopher Edward Wolfe, Nathan Evan McCurdy Gibson, Rodrigo Rodriguez Erdmenger, Deepak Trivedi, Quang Tue Nguyen Tran
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Publication number: 20200157961Abstract: An aspect of the present disclosure is directed to a seal assembly for a turbo machine. The seal assembly includes a fluid bearing wall including a bearing face in which the bearing face defines a fluid opening through the fluid bearing wall. The seal assembly further includes a seal body extended circumferentially relative to a centerline axis. The seal body defines a cavity extended at least partially circumferentially through the seal body. A fluid passage is defined through the seal body in fluid communication with the fluid opening through the fluid bearing wall.Type: ApplicationFiled: November 19, 2018Publication date: May 21, 2020Inventors: Rodrigo Rodriguez Erdmenger, Nathan Evan McCurdy Gibson, Quang Tue Nguyen Tran, Antonio Guijarro Valencia
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Publication number: 20200157964Abstract: An aspect of the present disclosure is directed to a seal assembly. The seal assembly includes a fluid bearing wall including a bearing face defining a fluid opening through the fluid bearing wall. The seal assembly further includes a tilt member is extended from and attached to the fluid bearing wall. The tilt member defines a fluid passage therethrough in fluid communication with the fluid opening at the bearing face of the fluid bearing wall. The seal assembly still further includes a seal body surrounding the tilt member. A cavity is defined between the tilt member and the seal body. The seal assembly further includes a spring member coupled to the seal body and the fluid bearing wall. A passage is defined between the fluid bearing wall and the seal body.Type: ApplicationFiled: November 19, 2018Publication date: May 21, 2020Inventors: Rodrigo Rodriguez Erdmenger, Nathan Evan McCurdy Gibson, Quang Tue Nguyen Tran, Antonio Guijarro Valencia
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Publication number: 20200088059Abstract: An aspirating face seal between high and low pressure regions of a turbomachine at a juncture between rotatable and non-rotatable members of turbomachine includes gas bearing rotatable and non-rotatable face surfaces. Primary and starter seal teeth and optional deflector seal tooth are mounted on seal teeth carrier on rotatable member. Non-rotatable face surface is mounted on an annular slider on the non-rotatable member. A pull-off biasing means urges the annular slider away from the rotatable member and the non-rotatable face surface away from the rotatable surface. A secondary seal is in sealing engagement with the annular slider in the low pressure region and the pull-off biasing means is located radially outwardly of the annular slider in the high pressure region. Biasing means may include coil springs within spring chambers of circumferentially spaced cartridges. Tongues extend inwardly from spring chambers into grooves in slider.Type: ApplicationFiled: September 12, 2018Publication date: March 19, 2020Inventors: Nathan Evan McCurdy GIBSON, Christopher Jon POTOKAR, Hariharan Manickavasagam SAROJINI, Arnab SEN, Bikramjit CHATTERJEE
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Patent number: 10573791Abstract: Quantum dot polymer composites for on-chip light emitting diode applications are described. In an example, a composite for on-chip light emitting diode application includes a polymer matrix, a plurality of quantum dots dispersed in the polymer matrix, and a base dispersed in the polymer matrix.Type: GrantFiled: September 19, 2017Date of Patent: February 25, 2020Assignee: OSRAM Opto Semiconductors GmbHInventors: Kari N. Haley, Benjamin Daniel Mangum, Weiwen Zhao, Nathan Evan Stott, Juanita N. Kurtin
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Patent number: D893443Type: GrantFiled: September 24, 2018Date of Patent: August 18, 2020Assignee: Polycom, Inc.Inventors: Hector Rodriguez, Nathan Yang, Anthony Martin Duys, Yanlin Zhu, Samuel Alexander Moon, Nathan Evan Careless
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Patent number: D894876Type: GrantFiled: April 10, 2019Date of Patent: September 1, 2020Assignee: Polycom, Inc.Inventors: Hector Rodriguez, Anthony Martin Duys, Yanlin Zhu, Nathan Yang, Samuel Alexander Moon, Nathan Evan Careless, Adam Thomas Prather
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Patent number: D902169Type: GrantFiled: February 11, 2019Date of Patent: November 17, 2020Assignee: Polycom, Inc.Inventors: Hector Rodriguez, Anthony Martin Duys, Yanlin Zhu, Nathan Yang, Samuel Alexander Moon, Nathan Evan Careless, Adam Thomas Prather
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Patent number: RE48409Abstract: Quantum dot polymer composites for on-chip light emitting diode applications are described. In an example, a composite for on-chip light emitting diode application includes a polymer matrix, a plurality of quantum dots dispersed in the polymer matrix, and a base dispersed in the polymer matrix.Type: GrantFiled: October 26, 2018Date of Patent: January 26, 2021Assignee: OSRAM Opto Semiconductors GmbHInventors: Kari N. Haley, Benjamin Daniel Mangum, Weiwen Zhao, Nathan Evan Stott, Juanita N. Kurtin