Patents by Inventor Evangelos Trifon Laskaris

Evangelos Trifon Laskaris 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: 10770211
    Abstract: A superconducting magnet system is provided. The superconducting magnet system includes a coil former, superconducting coils supported by the coil former, and one or more cooling assemblies. The cooling assemblies are in thermal contact with the coil former and include one or more cooling tubes for receiving a cryogen passed therethrough. The cooling assemblies are detachably mounted on the coil former and form at least one cooling circuit therein. The cooling assemblies include one or more flat surfaces attached on a surface of the coil former. A method of manufacturing the same is also provided.
    Type: Grant
    Filed: April 28, 2016
    Date of Patent: September 8, 2020
    Assignee: GE Precision Healthcare LLC
    Inventors: GuangZhou Li, Anbo Wu, Yihe Hua, Minfeng Xu, Evangelos Trifon Laskaris
  • Patent number: 10670189
    Abstract: A system includes a storage tank storing gas. The storage tank includes a storage tank interface portion made from a first material. The system also includes a nozzle that includes a nozzle interface portion and a first portion. The first portion is made from a second material different from the first material. Additionally, the system includes a connection formed by coupling the storage tank interface portion and the nozzle interface portion to one another, and the connection is configured to maintain a leak rate of the gas equal to or less than 1×10?4 standard cubic centimeters per second (std. cc/s).
    Type: Grant
    Filed: July 19, 2017
    Date of Patent: June 2, 2020
    Assignee: General Electric Company
    Inventors: Ernst Wolfgang Stautner, Paul St. Mark Shadforth Thompson, Anbo Wu, Alexander Kagan, Minfeng Xu, Evangelos Trifon Laskaris, Justin Michael Ricci
  • Patent number: 10416254
    Abstract: A magnetic resonance imaging system includes at least one gradient coil, at least one coil former, a thermal shield assembly, and at least one linking member. The at least one gradient coil generates at least one gradient field along at least one direction in response to pulsed signals. The at least one coil former is attached with at least one coil. The thermal shield assembly is arranged adjacent to the at least one coil former. The at least one linking member is configured for increasing mechanical rigidity of the thermal shield assembly by mechanically linking at least a part of the thermal shield assembly with the at least one coil former. As a result, mechanical vibrations of the thermal shield assembly can be reduced.
    Type: Grant
    Filed: March 26, 2014
    Date of Patent: September 17, 2019
    Assignee: General Electric Company
    Inventors: Evangelos Trifon Laskaris, Longzhi Jiang, Yihe Hua
  • Patent number: 10281538
    Abstract: A warm bore cylinder assembly having an outer wall, an inner wall, and a plurality of braces is provided. The outer wall is configured to define an inner exterior portion of a cryostat assembly. The outer wall is generally cylindrical, is made of a conductive material, and has an outer wall thickness. The inner wall is disposed radially inwardly of the outer wall. The inner wall is generally cylindrical, is made of a conductive material, and has an inner wall thickness. The braces extend along an axial direction defined by the outer wall and the inner wall. The plurality of braces are interposed between and join the outer wall and inner wall. The plurality of braces define openings disposed between adjacent braces.
    Type: Grant
    Filed: September 5, 2012
    Date of Patent: May 7, 2019
    Assignee: General Electric Company
    Inventors: Jean-Baptiste Mathieu, Evangelos Trifon Laskaris, Kenneth William Rohling, Minfeng Xu, Seung-Kyun Lee
  • Patent number: 10224799
    Abstract: A cryocooler assembly for cooling a field winding of an electrical machine having an axis of rotation is provided. The assembly includes a cryocooler and a reservoir coupled in flow communication to the cryocooler and configured to contain a cooling agent. A flow assembly is coupled in flow communication to the reservoir. The flow assembly includes a first flow loop coupled in flow communication to the reservoir; a second flow loop coupled in flow communication to the reservoir; and a plurality of flow members coupled in flow communication to the first flow loop and the second flow loop and coupled to the field winding. Each flow member is configured to thermosiphon the cooling agent in a first state from the reservoir and in a second state to the reservoir.
    Type: Grant
    Filed: October 8, 2012
    Date of Patent: March 5, 2019
    Assignee: GENERAL ELECTRIC COMPANY
    Inventors: Ernst Wolfgang Stautner, Evangelos Trifon Laskaris, Kiruba Sivasubramaniam Haran, Ruben Jeevanasan Fair, Randy Scott Longtin, Suyu Hou, Fulton Jose Lopez
  • Publication number: 20190024846
    Abstract: A system includes a storage tank storing gas. The storage tank includes a storage tank interface portion made from a first material. The system also includes a nozzle that includes a nozzle interface portion and a first portion. The first portion is made from a second material different from the first material. Additionally, the system includes a connection formed by coupling the storage tank interface portion and the nozzle interface portion to one another, and the connection is configured to maintain a leak rate of the gas equal to or less than 1×10?4 standard cubic centimeters per second (std. cc/s).
    Type: Application
    Filed: July 19, 2017
    Publication date: January 24, 2019
    Inventors: Ernst Wolfgang Stautner, Paul St. Mark Shadforth Thompson, Anbo Wu, Alexander Kagan, Minfeng Xu, Evangelos Trifon Laskaris, Justin Michael Ricci
  • Publication number: 20180144851
    Abstract: A superconducting magnet system is provided. The superconducting magnet system includes a coil former, superconducting coils supported by the coil former, and one or more cooling assemblies. The cooling assemblies are in thermal contact with the coil former and include one or more cooling tubes for receiving a cryogen passed therethrough. The cooling assemblies are detachably mounted on the coil former and form at least one cooling circuit therein. The cooling assemblies include one or more flat surfaces attached on a surface of the coil former. A method of manufacturing the same is also provided.
    Type: Application
    Filed: April 28, 2016
    Publication date: May 24, 2018
    Inventors: GuangZhou Li, Anbo Wu, Yihe Hua, Minfeng Xu, Evangelos Trifon Laskaris
  • Publication number: 20180120392
    Abstract: A superconducting magnet cooling system is disclosed. The superconducting magnet cooling system includes a superconducting magnet; a liquid cryogen vessel for cooling the superconducting magnet; a heat exchanger device in fluid communication with the liquid cryogen vessel; a cryorefrigerator for heat exchange with the heat exchanger device; and a flexible connection device having high thermal conductivity and thermally connecting the cryorefrigerator and the heat exchanger device to provide vibration isolation of the cryorefrigerator from the heat exchange device.
    Type: Application
    Filed: April 28, 2016
    Publication date: May 3, 2018
    Inventors: Evangelos Trifon Laskaris, William E-Wei Chen, Longzhi Jiang, Tao Zhang, Haixia Xi, Jun Li
  • Patent number: 9640308
    Abstract: A high temperature superconducting (HTS) magnet coil disposed within a cryostat is configured with a thermo-siphon cooling system containing a liquid cryogen. The cooling system is configured to indirectly conduction cool the HTS magnet coil by nucleate boiling of the liquid cryogen that is circulated by the thermo-siphon in a cooling tube attached to a heat exchanger bonded to the outside surface of the HTS magnet coil. A supply dewar is configured with a re-condenser cryocooler coldhead to recondense boiloff vapors generated during the nucleate boiling process.
    Type: Grant
    Filed: October 14, 2008
    Date of Patent: May 2, 2017
    Assignee: General Electric Company
    Inventors: Evangelos Trifon Laskaris, James Pellegrino Alexander, Kiruba Sivasubramaniam, Tao Zhang
  • Patent number: 9552906
    Abstract: In embodiments of the invention, a superconductor lead is configured to have less ohmic heating by its own current and less heat conduction from room temperature to cryogenic temperature, where a cryogenic apparatus is located. The superconducting lead with no ohmic resistance and low thermal conductivity disclosed herein maximizes current capacity by placing superconductors in parallel, each having equal current. Thus, the resistances are controlled to provide uniform current distribution through each superconductor of the high temperature superconducting (HTS) lead.
    Type: Grant
    Filed: September 1, 2015
    Date of Patent: January 24, 2017
    Assignee: General Electric Company
    Inventors: Susumu Mine, Evangelos Trifon Laskaris, Minfeng Xu, Ye Bai
  • Patent number: 9515469
    Abstract: A vacuum feed-through assembly and a method for manufacturing the same including a conductor having a threaded outer diameter end, a plastic seal having a threaded inner diameter matching the threaded outer diameter end of the conductor, and an epoxy to epoxy bond the threaded inner diameter of the plastic seal to the threaded outer diameter end of the conductor.
    Type: Grant
    Filed: December 14, 2012
    Date of Patent: December 6, 2016
    Assignee: General Electric Company
    Inventors: Evangelos Trifon Laskaris, Gene Conte, Susumu Mine
  • Patent number: 9508477
    Abstract: A superconducting magnet system includes a coil support structure, superconducting coils, and electrically and thermally conductive windings. The superconducting coils and the conductive windings are supported by the coil support structure. Each conductive winding is electromagnetically coupled with a corresponding superconducting coil. Each conductive winding is electrically shorted.
    Type: Grant
    Filed: November 3, 2014
    Date of Patent: November 29, 2016
    Assignee: General Electric Company
    Inventors: Anbo Wu, Minfeng Xu, Timothy James Hollis, Ye Bai, Weijun Shen, Evangelos Trifon Laskaris, Jian-She Wang, Yan Zhao
  • Publication number: 20160189841
    Abstract: A cooling system for a low-cryogen superconducting magnet includes a primary cooling loop having a liquid reservoir containing a supply of liquid cryogen and a plurality of cooling tubes fluidly coupled to the liquid reservoir and in thermal communication with the superconducting magnet. The liquid cryogen is configured for circulation through the cooling tubes for providing primary cooling for the magnet for cooling the magnet to a target temperature. The cooling system also includes a thermal battery coupled to a component that is cooled to the target temperature by the primary cooling loop and is configured to be cooled by the primary cooling and to absorb heat from the at least one component during an interruption in the primary cooling to maintain the magnet at approximately the target temperature.
    Type: Application
    Filed: December 31, 2014
    Publication date: June 30, 2016
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: JUN LI, EVANGELOS TRIFON LASKARIS, LONGZHI JIANG, MINFENG XU, ERNST WOLFGANG STAUTNER, ANBO WU
  • Publication number: 20160180996
    Abstract: A superconducting magnet system including a coil former, superconducting coils supported by the coil former, and one or more thermally conductive tubes. The one or more thermally conductive tubes are embedded inside of the coil former. The one or more thermally conductive tubes are in thermal contact with the coil former and arranged to receive a cryogen.
    Type: Application
    Filed: October 23, 2013
    Publication date: June 23, 2016
    Applicant: General Electric Company
    Inventors: Anbo Wu, Evangelos Trifon Laskaris, Paul St. Mark Shadforth Thompson, Tao Zhang, Qi Zhao, GuangZhou Li
  • Patent number: 9305703
    Abstract: A wire disposing assembly having a support, an axial traverser sub-assembly, a support arm, and a linear stage is provided. The support is configured to receive a plurality of turns of a wire, where the support is configured to rotate. The axial traverser sub-assembly is operatively coupled to the support. Further, a rate of motion of the axial traverser sub-assembly is coupled to a speed of rotation of the support. The support arm includes a resin unit configured to dispose resin on at least a portion of the wire, and a wire disposing device configured to guide a portion of the wire being disposed on a surface of the support. The linear stage is operatively coupled to the support arm.
    Type: Grant
    Filed: September 19, 2013
    Date of Patent: April 5, 2016
    Assignee: General Electric Company
    Inventors: Pierino Gianni Bonanni, Paul St. MarkShadforth Thompson, Martin Kin-Fei Lee, Christopher Darby Immer, Russell Stephen DeMuth, Jonathan Sebastian Janssen, Danny William Johnson, Evangelos Trifon Laskaris, Owen Scott Quirion
  • Patent number: 9287485
    Abstract: Method for joining wires using low resistivity joints is provided. More specifically, methods of joining one or more wires having superconductive filaments, such as magnesium diboride filaments, are provided. The wires are joined by a low resistivity joint to form wires of a desired length for applications, such in medical imaging applications.
    Type: Grant
    Filed: March 9, 2012
    Date of Patent: March 15, 2016
    Assignee: General Electric Company
    Inventors: Judson Sloan Marte, Xianrui Huang, Evangelos Trifon Laskaris, Bruce Alan Knudsen, Thomas Robert Raber, Robert John Zabala, James William Bray, Paul Shadforth Thompson, Sergio Paulo Martins Loureiro, Curtis Alan Johnson, Sylvia Marie Decarr
  • Publication number: 20160054406
    Abstract: A magnetic resonance imaging system includes at least one gradient coil, at least one coil former, a thermal shield assembly, and at least one linking member. The at least one gradient coil generates at least one gradient field along at least one direction in response to pulsed signals. The at least one coil former is attached with at least one coil. The thermal shield assembly is arranged adjacent to the at least one coil former. The at least one linking member is configured for increasing mechanical rigidity of the thermal shield assembly by mechanically linking at least a part of the thermal shield assembly with the at least one coil former. As a result, mechanical vibrations of the thermal shield assembly can be reduced.
    Type: Application
    Filed: March 26, 2014
    Publication date: February 25, 2016
    Inventors: Evangelos Trifon LASKARIS, Longzhi JIANG, Yihe HUA
  • Patent number: 9201128
    Abstract: A system for producing precision magnetic coil windings is provided. The system includes a wire disposing assembly having a support, an axial traverser sub-assembly, and a support arm. The support is configured to receive a plurality of turns of a wire. The axial traverser sub-assembly is operatively coupled to the support. The support arm includes a wire disposing device. The system further includes a linear stage, a monitoring unit, a feedback unit, and a controller unit. The linear stage is operatively coupled to the support arm. Moreover, the controller unit is configured to axially position an incoming portion of the wire and provide reference trajectories for tracking.
    Type: Grant
    Filed: September 19, 2013
    Date of Patent: December 1, 2015
    Assignee: General Electric Company
    Inventors: Pierino Gianni Bonanni, Paul St. Mark Shadforth Thompson, Martin Kin-Fei Lee, Christopher Darby Immer, Russell Stephen DeMuth, Jonathan Sebastian Janssen, Danny William Johnson, Evangelos Trifon Laskaris, Owen Scott Quirion
  • Patent number: 9182464
    Abstract: A current lead assembly for minimizing heat load to a conduction cooled superconducting magnet during a ramp operation is provided. The current lead assembly includes a vacuum chamber having a through hole to enable a retractable current lead having a retractable contact to penetrate within the vacuum chamber. A superconducting magnet is arranged inside of the vacuum chamber and includes a magnet lead. A current contact is arranged inside of the vacuum chamber beneath the through-hole and is coupled to the magnet lead via a thermal connector. The current contact is supported by a thermal isolation support structure coupled to an inside wall of the vacuum chamber. An actuator assembly is provided to contact the retractable contact with the current contact, where connection occurs at ambient temperature inside of the thermal isolation support structure.
    Type: Grant
    Filed: July 27, 2012
    Date of Patent: November 10, 2015
    Assignee: General Electric Company
    Inventors: Susumu Mine, Evangelos Trifon Laskaris, Paul St. Mark Shadforth Thompson
  • Publication number: 20150075670
    Abstract: A system for producing precision magnetic coil windings is provided. The system includes a wire disposing assembly having a support, an axial traverser sub-assembly, and a support arm. The support is configured to receive a plurality of turns of a wire. The axial traverser sub-assembly is operatively coupled to the support. The support arm includes a wire disposing device. The system further includes a linear stage, a monitoring unit, a feedback unit, and a controller unit. The linear stage is operatively coupled to the support arm. Moreover, the controller unit is configured to axially position an incoming portion of the wire and provide reference trajectories for tracking.
    Type: Application
    Filed: September 19, 2013
    Publication date: March 19, 2015
    Applicant: General Electric Company
    Inventors: Pierino Gianni Bonanni, Paul St. Mark Shadforth Thompson, Martin Kin-Fei Lee, Christopher Darby Immer, Russell Stephen DeMuth, Jonathan Sebastian Janssen, Danny William Johnson, Evangelos Trifon Laskaris, Owen Scott Quirion