대표
청구항
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1. A fluid transfer conduit, comprising: a plurality of concentric tubes nested about an axis the plurality of concentric tubes comprising three concentric tubes;each of the plurality of concentric tubes having an upstream end and a downstream end; andeach of the plurality of concentric tubes joined with an adjacent concentric tube at one of the upstream or downstream ends, wherein a fluid passageway is formed. 2. The fluid transfer conduit of claim 1, further comprising a first connector formed on one end of one of the plurality of concentric tubes and ...
1. A fluid transfer conduit, comprising: a plurality of concentric tubes nested about an axis the plurality of concentric tubes comprising three concentric tubes;each of the plurality of concentric tubes having an upstream end and a downstream end; andeach of the plurality of concentric tubes joined with an adjacent concentric tube at one of the upstream or downstream ends, wherein a fluid passageway is formed. 2. The fluid transfer conduit of claim 1, further comprising a first connector formed on one end of one of the plurality of concentric tubes and a second connector formed on one end of another concentric tube, wherein the plurality of the concentric tubes is configured to distribute an external load applied on the first connector and the second connector to each of the concentric tubes, wherein each of the concentric tubes is subjected to a tensile stress or a compressive stress in an alternating manner. 3. The fluid transfer conduit of claim 2, wherein the inlet connector and the outlet connector are attached to a support structure of a fluid transfer system, wherein the inlet connector and the outlet connector are attached to the support structure in an air tight manner to form a vacuum cavity between the support structure and the plurality of tubes; the vacuum cavity thermally insulating a fluid in the fluid passageway from a surrounding environment. 4. The fluid transfer conduit of claim 2, wherein the plurality of concentric tubes comprises an inner tube, a middle tube and an outer tube, wherein the upstream end of the inner tube is joined with the upstream end of the middle tube at a first joint, and the downstream end of the middle tube is joined with the downstream end of the outer tube at a second joint, wherein the first and second joints are floating joints; the inlet connector formed on the upstream end of the outer tube and the outlet connector formed on the downstream end of the inner tube. 5. The fluid transfer conduit of claim 4, wherein the inlet connector and the outlet connector are pulled apart from each other by an external load; the plurality of concentric tubes configured to distribute a stress from the external load to the inner tube, the middle tube and the outer tube. 6. The fluid transfer conduit of claim 5, wherein the outer tube expands, the middle tube compresses and the inner tube expands such that the plurality of concentric tubes extends, wherein the outer tube and the inner tube slide in a telescoping like manner, while the middle tube compresses, wherein the stress from the external load applied on the inlet connector and the outlet connector is divided and distributed to the outer tube, the middle tube and the inner tube. 7. The fluid transfer conduit of claim 4, wherein the inlet connector and the outlet connector are pushed toward each other by an external load; the plurality of concentric tubes configured to distribute a stress from the external load to the inner tube, middle tube, and the outer tube. 8. The fluid transfer conduit of claim 7, wherein the outer tube compresses, the middle tube expands and the inner tube compresses such that the plurality of concentric tubes compresses, wherein the outer tube and the inner tube slide in a telescoping like manner, while the middle tube expands, wherein the stress from the external load applied on the inlet connector and the outlet connector is divided and distributed to the outer tube, the middle tube and the inner tube. 9. The fluid transfer conduit of claim 2, wherein the plurality of concentric tubes comprises four concentric tubes including a first tube, a second tube, a third tube and a fourth tube; wherein the first connector is formed on the upstream end of the first tube and the second connector is formed on the upstream end of the fourth tube; wherein the downstream end of the first tube is joined with the downstream end of the second tube at a first joint, and the upstream end of the second tube and the upstream end of the third tube joined at a second joint, and the downstream end of the third tube and the downstream end of the fourth tube is joined at a third joint; wherein the first joint, the second joint and the third joint are floating joints; wherein the first connector is attached to a support structure and the second connector is attached to the first connector. 10. The fluid transfer conduit of claim 1, wherein the plurality of concentric tubes comprises five concentric tubes, wherein the plurality of concentric tube is configured to accommodate an axial tensile stress induced in the fluid transfer conduit by dividing and distributing the axial tensile stress to the five concentric tubes, wherein an axial tensile stress is induced in an outermost tube, a center tube and an innermost tube, and thus expanding these tubes, and an axial compressive stress is induced in tubes arranged between the outermost tube and the center tube, and the innermost tube and the center tube, and thus compressing theses tubes; the tubes subjected the axial tensile stress sliding in a telescoping like manner, while the tubes subjected to the axial compressive stress compress, thereby extending the plurality of concentric tubes, wherein each of the five tubes expands and compresses alternatingly. 11. The fluid transfer conduit of claim 1, wherein the fluid transfer conduit comprises five concentric tubes, wherein the fluid transfer conduit is configured to accommodate an axial compressive stress induced in the fluid transfer conduit by dividing and distributing the axial compressive stress to the five concentric tubes, wherein an axial compressive stress is induced in an outermost tube, a center tube and an innermost tube, and thus compressing these tubes, and an axial tensile stress is induced in tubes arranged between the outermost tube and the center tube, and the innermost tube and the center tube, and thus expanding these tubes, the tubes subjected the axial tensile stress sliding in a telescoping like manner, while the tubes subjected to the axial compressive stress compress, thereby compressing the plurality of concentric tubes, wherein each of the five tubes compresses and expands alternatingly. 12. The fluid transfer conduit of claim 1, wherein at least one of the plurality of concentric tubes is formed of a material having a different thermal expansion coefficient than the other tubes. 13. The fluid transfer conduit of claim 1, wherein each of the plurality of concentric tubes has about same cross-sectional area, such that each to the plurality of the concentric tubes has about same stiffness for equal distribution of a stress from an external load applied on the plurality of concentric tubes, wherein a wall thickness of each of the plurality of the concentric tubes decreases from an innermost tube to an outermost tube. 14. A fuel nozzle, comprising: a fuel nozzle support having a nozzle stem structure and a nozzle head structure;a fuel transfer conduit including: a plurality of concentric tubes nested about an axis the plurality of concentric tubes comprising three concentric tubes;each of the plurality of concentric tubes having an upstream end and a downstream end;each of the plurality of concentric tubes joined with an adjacent concentric tube at one of the upstream or downstream ends, wherein a fluid passageway is formed; andwherein the fuel transfer conduit is arranged within the fuel nozzle support and attached to an inner surface of the fuel nozzle support. 15. The fuel nozzle of claim 14, wherein the fuel transfer conduit further comprises a first connector formed on one end of one of the plurality of concentric tubes and a second connector formed on one end of another concentric tube. 16. The fuel nozzle of claim 15, wherein the fluid transfer conduit is a fuel transfer conduit, the fuel transfer conduit arranged in the nozzle stem structure, wherein the first connector is attached to the inner surface of the nozzle stem structure and the second connector is attached to a fuel transfer tube arranged in the nozzle head structure; the fuel transfer tube including a third connector, the third connector attached to an inner surface of the nozzle head structure; wherein the first connector, the second connector and the third connector are attached by vacuum brazing to form a vacuum cavity between the plurality of concentric tubes and the nozzle stem structure, and the fuel transfer tube and the nozzle head structure; the vacuum cavity thermally insulating fuel from a surrounding environment. 17. The fuel nozzle of claim 15, wherein the fluid transfer conduit is configured to divide and distribute a stress from an external axial load applied on the fluid transfer conduit to each of the concentric tubes, wherein each of the concentric tubes expands or compresses in an alternating manner. 18. The fuel nozzle of claim 14, wherein the fuel nozzle includes a plurality of fluid transfer conduits, wherein a plurality of fluid passage ways are formed to transfer a plurality of fuel streams. 19. The fuel nozzle of claim 18, wherein at least one of the plurality of fluid transfer conduits is an air transfer conduit, wherein the air transfer conduit carrying a stream of air provides a heat shield for at least one of the plurality of fuel streams from an external environment having an elevated temperature or the stream of air flowing through the air transfer conduit. 20. The fuel nozzle of claim 18, wherein at least one of the plurality of fluid transfer conduits is a multi-function conduit, wherein the multi-function conduit defines a portion of a fuel flow path and a portion of an airflow path, wherein the multi-function conduit provides a heat shield for at least one of the plurality of fuel streams from an external environment or a stream of air flowing through the airflow path. 21. A pipe joint assembly comprising: a first pipe;a second pipe; anda fluid transfer conduit joining the first pipe and the second pipe, the fluid transfer conduit including: a plurality of concentric tubes nested about an axis the plurality of concentric tubes comprising three concentric tubes;each of the plurality of concentric tubes having an upstream end and a downstream end; andeach of the plurality of concentric tubes joined with an adjacent concentric tube at one of the upstream or downstream ends, wherein a fluid passageway is formed. 22. The pipe joint assembly of claim 21, wherein the fluid transfer conduit is configured to divide and distribute an axial stress induced in the pipe joint assembly to each of the concentric tubes, wherein each of the concentric tubes are subjected to alternating tensile stress and compressive stress. 23. The pipe joint assembly of claim 22, wherein the fluid transfer conduit comprises fluid transfer conduit comprises three concentric tubes are configured to divide and distribute a thermal expansion stress induced in the pipe joint assembly; wherein an outer tube and an inner tube are subjected to a tensile stress and expand, whereas a middle tube is subjected to a compressive stress and compresses; wherein the outer tube and the inner tube slide in a telescoping like manner, while the middle tube compresses, thereby extending the fluid transfer conduit to accommodate the thermal expansion stress induced in the pipe joint assembly. 24. The pipe joint assembly of claim 22, wherein the three concentric tubes are configured to divide and distribute a thermal compression stress induced in the pipe joint assembly, wherein an outer tube and an inner tube are subjected to a compressive stress and compress; whereas a middle tube is subjected to a tensile stress to and expands; thereby compressing the fluid transfer tube to accommodate the thermal compression stress induced in the pipe joint assembly. 25. The pipe joint assembly of claim 22, wherein the fluid transfer conduit comprises five concentric tubes configured to divide and distribute a thermally induced axial stress, wherein each of the concentric tubes are subjected to alternating tensile stress and compressive stress. 26. A method of reducing an axial stress induced on a fluid transfer conduit comprising: forming a fuel transfer conduit including: a plurality of concentric tubes nested about an axis the plurality of concentric tubes comprising three concentric tubes;each of the plurality of concentric tubes having an upstream end and a downstream end; andeach of the plurality of concentric tubes joined with an adjacent concentric tube at one of the upstream or downstream ends, wherein a fluid passageway is formed;a first connector formed on the upstream end of one of the plurality of concentric tubes and a second connector formed on the downstream end of one of the plurality of concentric tubes; andjoining the fluid transfer conduit to a fluid transfer system, wherein the first connector and the second connector are attached to a structural support of the fluid transfer system. 27. The method of claim 26, wherein the fluid transfer conduit is configured to divide and distribute an axial stress induced in the fluid transfer conduit, wherein each of the concentric tubes are subjected to alternating tensile stress and compressive stress, thereby expanding and compressing alternatingly. 28. A method of improving thermal insulation of a fluid transfer system comprising: forming a fuel transfer conduit including: a plurality of concentric tubes nested about an axis the plurality of concentric tubes comprising three concentric tubes;each of the plurality of concentric tubes having an upstream end and a downstream end; andeach of the plurality of concentric tubes joined with an adjacent concentric tube at one of the upstream or downstream ends, wherein a fluid passageway is formed;a first connector formed on the upstream end of one of the plurality of concentric tubes and a second connector formed on the downstream end of one of the plurality of concentric tubes;arranging the fluid transfer conduit within the fluid transfer system, wherein the first connector and the second connector are attached to a structural of the fluid transfer system; andforming a vacuum cavity between the plurality of concentric tubes and an inner surface of the fluid transfer system, wherein the vacuum cavity providing thermal insulation between a fluid in the fluid transfer conduit and an environment external to the fluid transfer system. 29. The method of claim 28, wherein the vacuum cavity is formed when the first connector and the second connector are attached using a vacuum brazing or welding process.