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).

  • Structural reinforced superconducting ceramic tape and method of making
    Patent number: 6711421
    Abstract: There is provided a reinforced superconducting tape. The reinforced tape includes a superconducting tape containing a superconducting ceramic material, a first metal reinforcing layer having a greater coefficient of thermal expansion than that of the superconducting tape, and a second metal reinforcing layer having a greater modulus of elasticity than the superconducting tape and the first reinforcing layer.
    Type: Grant
    Filed: September 25, 2001
    Date of Patent: March 23, 2004
    Assignee: General Electric Company
    Inventors: Yu Wang, Evangelos Trifon Laskaris
  • Method and apparatus for magnetizing a permanent magnet
    Patent number: 6662434
    Abstract: A method of making a permanent magnet body is provided. The method includes providing a first precursor body comprising a plurality of blocks and magnetizing the first precursor body to form a first permanent magnet body. A recoil magnetization pulse may be applied to the permanent magnet body after the magnetization. The precursor body may be heated during magnetization. A power supply containing a battery may be used to energize a pulsed magnet used to magnetize the precursor body.
    Type: Grant
    Filed: July 3, 2001
    Date of Patent: December 16, 2003
    Assignee: General Electric Company
    Inventors: Evangelos Trifon Laskaris, Liang Li, Kathleen Melanie Amm, Juliana Chiang Shei, Bulent Aksel, Mark Gilbert Benz, Gerald Burt Kliman, Paul Shadworth Thompson, Israel Samson Jacobs, Harold Jay Patchen
  • High field open MRI magnet isolation system and method
    Publication number: 20030179060
    Abstract: A vertically-aligned open MRI magnet system includes first and second (i.e., top and bottom) assemblies each having a longitudinally-extending and vertically-aligned axis, a superconductive main coil, and a vacuum enclosure enclosing the main coil. At least one support beam has a first end attached to the first assembly and has a second end attached to the second assembly. A vibration isolation system supports the magnet system.
    Type: Application
    Filed: March 19, 2003
    Publication date: September 25, 2003
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Yu Wang, Evangelos Trifon Laskaris, Richard Andrew Ranze
  • High temperature super-conducting rotor coil support with split coil housing and assembly method
    Publication number: 20030173862
    Abstract: A rotor is disclosed for a synchronous machine comprising: a rotor core; a super-conducting coil winding extending around at least a portion of the rotor, said coil winding having a side section adjacent a side of the rotor core; at least one tension rod extending through a conduit in said rotor core; and a housing attached to the tension rod and connected to the side section of the coil winding, wherein the housing comprises a pair of side panels.
    Type: Application
    Filed: April 15, 2003
    Publication date: September 18, 2003
    Applicant: General Electric Company
    Inventors: Yu Wang, Robert John Nygard, Evangelos Trifon Laskaris, James Pellegrino Alexander
  • High field open MRI magnet isolation system and method
    Publication number: 20030174036
    Abstract: A vertically-aligned open MRI magnet system includes first and second (i.e., top and bottom) assemblies each having a longitudinally-extending and vertically-aligned axis, a superconductive main coil, and a vacuum enclosure enclosing the main coil. At least one support beam has a first end attached to the first assembly and has a second end attached to the second assembly. A vibration isolation system supports the magnet system.
    Type: Application
    Filed: March 19, 2003
    Publication date: September 18, 2003
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Yu Wang, Evangelos Trifon Laskaris, Richard Andrew Ranze
  • High temperature super-conducting coils supported by an iron core rotor
    Patent number: 6617714
    Abstract: A rotor for a synchronous machine is disclosed comprising: a cylindrical magnetic solid rotor core; a race-track super-conducting coil winding extending around the rotor core; a coil support extending through the core and attaching to opposite long sides of the coil winding, and a pair of end shafts extending axially from said core and attached to the core.
    Type: Grant
    Filed: May 15, 2001
    Date of Patent: September 9, 2003
    Assignee: General Electric Company
    Inventor: Evangelos Trifon Laskaris
  • Super-conducting rotor coil support with tension rods and bolts
    Patent number: 6605885
    Abstract: A rotor is disclosed for a synchronous machine comprising: a rotor core; a super-conducting coil winding extending around at least a portion of the rotor core, said coil winding having a side section adjacent a side of the rotor core; at least one tension rod extending through a conduit in said rotor core; at least one tension bolt extending between an end of the tension rod and abutting the side section of the coil winding; and a channel housing attached to the tension bolt and the coil winding.
    Type: Grant
    Filed: May 15, 2001
    Date of Patent: August 12, 2003
    Assignee: General Electric Company
    Inventors: Evangelos Trifon Laskaris, James Pellegrino Alexander
  • High temperature superconductor synchronous rotor coil support insulator
    Patent number: 6605886
    Abstract: A rotor having a superconducting coil winding is disclosed having a rotor core having at least one conduit extending through the core; at least one tension rod extending between the pair of side sections of the coil winding and through said at least one conduit of the rotor; and an insulator in the conduit thermally separating the tension rod from the rotor.
    Type: Grant
    Filed: July 31, 2001
    Date of Patent: August 12, 2003
    Assignee: General Electric Company
    Inventor: Evangelos Trifon Laskaris
  • Super-conducting rotor coil winding support assembly method for synchronous machine
    Patent number: 6600251
    Abstract: A rotor is disclosed for a synchronous machine comprising: a rotor core; a super-conducting coil winding extending around at least a portion of the rotor core, said coil winding having a side section adjacent a side of the rotor core; at least one tension rod extending through a conduit in said rotor core; at least one tension bolt extending between an end of the tension rod and abutting the side section of the coil winding; and a channel housing attached to the tension bolt and the coil winding.
    Type: Grant
    Filed: August 15, 2002
    Date of Patent: July 29, 2003
    Assignee: General Electric Company
    Inventors: Evangelos Trifon Laskaris, James Pellegrino Alexander
  • High power density super-conducting electric machine
    Patent number: 6590308
    Abstract: A high power density synchronous machine is disclosed comprising: a stator having conventional stator coils arranged in an annulus around a vacuum cylindrical cavity; a magnetically saturated cylindrical magnetic solid rotor core; a race-track super-conducting coil winding extending around the rotor core, and a coil supportextending through the core and attaching to opposite long sides of the coil winding.
    Type: Grant
    Filed: May 15, 2001
    Date of Patent: July 8, 2003
    Assignee: General Electric Company
    Inventors: Richard Dawson, Yu Wang, Evangelos Trifon Laskaris
  • High temperature super-conducting synchronous rotor having an electromagnetic shield and method for assembly
    Patent number: 6590305
    Abstract: A rotor is disclosed for a synchronous machine comprising: a rotor core; a super-conducting coil winding extending around at least a portion of the rotor core, the coil winding having a pair of side sections on opposite sides of the rotor core; and a conductive shield around the rotor core and covering the coil winding.
    Type: Grant
    Filed: May 15, 2001
    Date of Patent: July 8, 2003
    Assignee: General Electric Company
    Inventors: Yu Wang, Robert John Nygard, Evangelos Trifon Laskaris, John Arthur Urbahn
  • High temperature superconducting rotor power leads
    Patent number: 6577028
    Abstract: The resistive power leads of a high temperature superconducting (HTS) rotor field coil are located in vacuum near the rotor axis and are cooled by thermal conduction to the return flow path by bonding the leads to the tubing bulkhead through ceramic insulators. The lead length, cross-section and electrical resistivity are optimized for minimum heat conduction and ohmic resistance heat transfer to the cold gas. Thermal expansion or contraction of the leads is accommodated by flexible sections at the warm and cold end of the leads.
    Type: Grant
    Filed: May 15, 2001
    Date of Patent: June 10, 2003
    Assignee: General Electric Company
    Inventors: Evangelos Trifon Laskaris, James Pellegrino Alexander
  • HIGH TEMPERATURE SUPERCONDUCTOR SYNCHRONOUS ROTOR COIL SUPPORT INSULATOR
    Publication number: 20030102770
    Abstract: A rotor having a superconducting coil winding is disclosed having a rotor core having at least one conduit extending through the core; at least one tension rod extending between the pair of side sections of the coil winding and through said at least one conduit of the rotor; and an insulator in the conduit thermally separating the tension rod from the rotor.
    Type: Application
    Filed: July 31, 2001
    Publication date: June 5, 2003
    Inventor: Evangelos Trifon Laskaris
  • Thermal shield suspension for superconductive magnets
    Patent number: 6570476
    Abstract: A method for assembling a thermal shield suspension assembly including a plurality of straps, wherein the straps are arranged in an alternately cross hatch arrangement such that a plurality of first straps extend at a first orientation with regards to the cryogenic vessel and a plurality of second straps extend at a second orientation with regards to the cryogenic vessel, and wherein the first orientation is different from the second orientation and each second strap is disposed between the adjacent first strap is provided, the method comprising securing the first strap including the tensioning block to a thermal shield flange and a cryogenic vessel flange and securing the second strap to the thermal shield flange and the cryogenic vessel flange.
    Type: Grant
    Filed: July 17, 2002
    Date of Patent: May 27, 2003
    Assignee: General Electric Company
    Inventor: Evangelos Trifon Laskaris
  • High temperature super-conducting rotor coil support with split coil housing and assembly method
    Patent number: 6570292
    Abstract: A rotor is disclosed for a synchronous machine comprising: a rotor core; a super-conducting coil winding extending around at least a portion of the rotor, said coil winding having a side section adjacent a side of the rotor core; at least one tension rod extending through a conduit in said rotor core; and a housing attached to the tension rod and connected to the side section of the coil winding, wherein the housing comprises a pair of side panels.
    Type: Grant
    Filed: May 15, 2001
    Date of Patent: May 27, 2003
    Assignee: General Electric Company
    Inventors: Yu Wang, Robert John Nygard, Evangelos Trifon Laskaris, James Pellegrino Alexander
  • Permanent magnet assembly and method of making thereof
    Publication number: 20030090354
    Abstract: An imaging apparatus, such as an MRI system, contains at least one layer of soft magnetic material between the yoke and each permanent magnet. This imaging apparatus may be operated without pole pieces due to the presence of the soft magnetic material. The permanent magnets may be fabricated by magnetizing unmagnetized alloy bodies after the unmagnetized alloy bodies have been attached to the yoke.
    Type: Application
    Filed: December 4, 2002
    Publication date: May 15, 2003
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Evangelos Trifon Laskaris, Michael Anthony Palmo, Kathleen Melanie Amm, Paul Shadforth Thompson
  • Permanent magnet assembly and method of making thereof
    Publication number: 20030085787
    Abstract: An imaging apparatus, such as an MRI system, contains at least one layer of soft magnetic material between the yoke and each permanent magnet. This imaging apparatus may be operated without pole pieces due to the presence of the soft magnetic material. The permanent magnets may be fabricated by magnetizing unmagnetized alloy bodies after the unmagnetized alloy bodies have been attached to the yoke.
    Type: Application
    Filed: December 4, 2002
    Publication date: May 8, 2003
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Evangelos Trifon Laskaris, Michael Anthony Palmo, Kathleen Melanie Amm, Paul Shadforth Thompson
  • Cryogenic cooling system for rotor having a high temperature super-conducting field winding
    Patent number: 6553773
    Abstract: A cooling fluid system is disclosed for providing cryogenic cooling fluid to a high temperature super-conducting rotor comprising: a cryogen storage tank storing a liquid cryogenic cooling fluid; an inlet transfer line connecting the storage tank to the rotor and forming a passage for liquid cooling fluid to pass from the tank to the rotor, wherein said storage tank is elevated above the rotor and the liquid cooling fluid is gravity fed to the rotor.
    Type: Grant
    Filed: May 15, 2001
    Date of Patent: April 29, 2003
    Assignee: General Electric Company
    Inventor: Evangelos Trifon Laskaris
  • High field open MRI magnet isolation system and method
    Publication number: 20030076205
    Abstract: A vertically-aligned open MRI magnet system includes first and second (i.e., top and bottom) assemblies each having a longitudinally-extending and vertically-aligned axis, a superconductive main coil, and a vacuum enclosure enclosing the main coil. At least one support beam has a first end attached to the first assembly and has a second end attached to the second assembly. A vibration isolation system supports the magnet system.
    Type: Application
    Filed: September 13, 2001
    Publication date: April 24, 2003
    Inventors: Yu Wang, Evangelos Trifon Laskaris, Richard Andrew Ranze
  • Structural reinforced superconducting ceramic tape and method of making
    Publication number: 20030059652
    Abstract: There is provided a reinforced superconducting tape. The reinforced tape includes a superconducting tape containing a superconducting ceramic material, a first metal reinforcing layer having a greater coefficient of thermal expansion than that of the superconducting tape, and a second metal reinforcing layer having a greater modulus of elasticity than the superconducting tape and the first reinforcing layer.
    Type: Application
    Filed: September 25, 2001
    Publication date: March 27, 2003
    Inventors: Yu Wang, Evangelos Trifon Laskaris