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91. 发明授权

US5568110A Closed MRI magnet having reduced length 失效
标题翻译：闭合MRI磁体具有减小的长度
公开(公告)号：US5568110A
公开(公告)日：1996-10-22
申请号：US603522
申请日：1996-02-20
申请人： Bizhan Dorri , Evangelos T. Laskaris , Michele D. Ogle
发明人： Bizhan Dorri , Evangelos T. Laskaris , Michele D. Ogle
IPC分类号： G01R33/3815 , G01R33/3875 , H01F6/06 , G01V3/00
CPC分类号： G01R33/3815 , G01R33/3875
摘要： A closed magnetic resonance imaging (MRI) magnet has a single superconductive coil assembly including a toroidal-shaped coil housing containing a pair of superconductive main coils. A pair of generally annular-shaped bucking coils, carrying electric current in a direction opposite to that of the superconductive main coils, is spaced radially inward and apart from the superconductive main coils. The bucking coils allow the design of a shorter MRI magnet because the bucking coils overcome the gross magnetic field distortions in the imaging volume of the magnet (created by removing some of the additional longitudinally-outermost superconductive main coils, otherwise used in the magnet, to make the magnet shorter) to produce a magnetic field of high uniformity within the imaging volume.
摘要翻译：闭合磁共振成像（MRI）磁体具有单个超导线圈组件，其包括含有一对超导主线圈的环形线圈壳体。在与超导主线圈的方向相反的方向上承载电流的一对大体呈环形的抵抗线圈与超导主线圈径向向内和间隔开。屈曲线圈允许设计较短的MRI磁体，因为降压线圈克服了磁体成像体积中的总磁场失真（通过除去磁体中另外使用的一些附加的纵向最外面的超导主线圈产生，使磁体更短），以在成像体积内产生高均匀性的磁场。

92. 发明授权

US5565831A Shielded and open MRI magnet 失效
标题翻译：屏蔽和开放MRI磁铁
公开(公告)号：US5565831A
公开(公告)日：1996-10-15
申请号：US547083
申请日：1995-10-23
申请人： Bizhan Dorri , Evangelos T. Laskaris , Michele D. Ogle , Timothy J. Havens
发明人： Bizhan Dorri , Evangelos T. Laskaris , Michele D. Ogle , Timothy J. Havens
IPC分类号： G01R33/421 , A61B5/055 , G01R33/38 , G01R33/3815 , H01F6/00 , H05K9/00 , G01V3/00
CPC分类号： G01R33/3806 , G01R33/3815
摘要： A shielded and open magnetic resonance imaging (MRI) magnet having two spaced-apart, generally toroidal-shaped superconductive coil assemblies. Each coil assembly has a coil housing containing a generally annular-shaped superconductive main and a radially-outwardly spaced-apart shielding coil carrying electric currents in opposing directions. Preferably, supplemental shielding is provided with the addition of: a generally annular permanent magnet configuration internal to, or external of, the coil housings; a generally-non-permanently-magnetized external ferromagnetic shield having at least a portion positioned longitudinally between the coil housings, an external resistive coil; or combinations thereof.
摘要翻译：具有两个间隔开的大致环形形状的超导线圈组件的屏蔽和开放磁共振成像（MRI）磁体。每个线圈组件具有线圈壳体，其包含大致环形的超导主体和沿相反方向承载电流的径向向外间隔开的屏蔽线圈。优选地，补充屏蔽被提供有：线圈壳体内部或外部的大致环形的永磁体构造; 一个非永久磁化的外部铁磁屏蔽件，至少有一部分纵向位于线圈壳体之间，一个外部电阻线圈; 或其组合。

93. 发明授权

US5381122A Open MRI magnet having a support structure 失效
标题翻译：具有支撑结构的开放磁共振磁体
公开(公告)号：US5381122A
公开(公告)日：1995-01-10
申请号：US181514
申请日：1994-01-14
申请人： Evangelos T. Laskaris , Constantinos Minas
发明人： Evangelos T. Laskaris , Constantinos Minas
IPC分类号： G01R33/38 , G01R33/3815 , H01F1/00 , G01V3/00 , H01F5/00
CPC分类号： G01R33/3806 , G01R33/3802 , G01R33/3815
摘要： An open magnetic resonance imaging (MRI) magnet having first and second spaced-apart superconductive coil assemblies connected by spaced-apart structural posts each having a first end portion attached to the coil form of the first coil assembly and a second end portion attached to the coil form of the second coil assembly. Each toroidal shaped coil form has radially spaced-apart inner and outer generally cylindrical shells and has longitudinally spaced-apart inner and outer annular plates each attached to the inner and outer cylindrical shells. A superconductive coil surrounds, and is attached to, the outer surface of the outer cylindrical shell.
摘要翻译：一种开放磁共振成像（MRI）磁体，其具有通过间隔开的结构柱连接的第一和第二间隔超导线圈组件，每个结构柱具有附接到第一线圈组件的线圈形式的第一端部分，第二线圈组件的线圈形式。每个环形线圈形式具有径向间隔开的内部和外部大致圆柱形壳体，并且具有纵向间隔开的内部和外部环形板，每个连接到内部和外部圆柱形壳体。超导线圈围绕并附接到外圆柱形外壳的外表面。

94. 发明授权

US5345208A Pole face design for a C-shaped superconducting magnet 失效
标题翻译： C形超导磁体的极面设计
公开(公告)号：US5345208A
公开(公告)日：1994-09-06
申请号：US67183
申请日：1993-05-26
申请人： Bizhan Dorri , Evangelos T. Laskaris , Gary Bedrosian , Bu-Xin Xu
发明人： Bizhan Dorri , Evangelos T. Laskaris , Gary Bedrosian , Bu-Xin Xu
IPC分类号： H01F6/00 , G01R33/38 , G01R33/3873 , H01F27/24 , G01V3/00 , G01R33/20
CPC分类号： G01R33/3873 , G01R33/3806
摘要： This invention relates to a pole face design for superconducting magnets of the type that are C-shaped. Such structures of this type, generally, employ pole faces which homogenize the magnet field within the imaging volume.
摘要翻译：本发明涉及一种C型超导磁体的极面设计。这种类型的这种结构通常采用使成像体积内的磁场均匀化的极面。

95. 发明授权

US5302928A Superconducting current leads for a cryogenless superconducting magnetic energy storage device 失效
标题翻译：超导电流引线用于无低温超导磁能储能装置
公开(公告)号：US5302928A
公开(公告)日：1994-04-12
申请号：US923684
申请日：1992-08-03
申请人： Evangelos T. Laskaris , Ahmed K. Kalafala
发明人： Evangelos T. Laskaris , Ahmed K. Kalafala
IPC分类号： H01F6/06 , H01F1/00
CPC分类号： H01F6/065
摘要： This invention relates to current leads for a superconducting magnet system of the type that are constructed of two-stages. Such structures of this type, generally, operate from ambient temperature to the temperature at the thermal shield and from the temperature of the thermal shield to that of the magnet such that ohmic losses are reduced.
摘要翻译：本发明涉及一种由两级构成的超导磁体系统的电流引线。这种类型的这种结构通常从环境温度到热屏蔽处的温度和从热屏蔽的温度到磁体的温度，从而降低了欧姆损耗。

96. 发明授权

US5301507A Superconducting magnetic energy storage device 失效
标题翻译：超导磁储能装置
公开(公告)号：US5301507A
公开(公告)日：1994-04-12
申请号：US923683
申请日：1992-08-03
申请人： Evangelos T. Laskaris , Ahmed K. Kalafala
发明人： Evangelos T. Laskaris , Ahmed K. Kalafala
IPC分类号： F25D19/00 , F25B19/00 , H01F7/22
CPC分类号： F25D19/006 , Y10S505/892 , Y10S505/894
摘要： This invention relates to a cryogenless superconducting magnet system of the type that is attached to a utility grid at end-user site and is used to store electrical energy until such time that an electrical disruption occurs in the grid. Structures of this type, generally, allow the stored electrical energy to be released in such a manner that the disruption in the utility grid is negated before it reaches critical loads.
摘要翻译：本发明涉及一种无终端的超导磁体系统，该系统在最终用户现场连接到公用电网，并用于存储电能，直到电网发生电中断。这种类型的结构通常允许以这样的方式释放储存的电能，使得在达到临界负载之前公用电网的中断被否定。

97. 发明授权

US5179338A Refrigerated superconducting MR magnet with integrated gradient coils 失效
标题翻译：具有集成梯度线圈的冷冻超导MR磁体
公开(公告)号：US5179338A
公开(公告)日：1993-01-12
申请号：US759337
申请日：1991-09-13
申请人： Evangelos T. Laskaris , Peter B. Roemer , Bizhan Dorri , Mark E. Vermilyea
发明人： Evangelos T. Laskaris , Peter B. Roemer , Bizhan Dorri , Mark E. Vermilyea
IPC分类号： G01R33/3815 , G01R33/385 , G01R33/3873 , G01R33/422
CPC分类号： G01R33/385 , G01R33/3815 , G01R33/3873 , G01R33/422
摘要： The invention relates to refrigerated superconducting MR magnets having integrated gradient coils. In particular, the amount of eddy currents produced by the magnet are substantially reduced while reducing the size and weight, and, therefore, the cost of the superconducting magnet required to produce an MR image.
摘要翻译：本发明涉及具有积分梯度线圈的冷冻超导MR磁体。特别地，磁体产生的涡流的量大大减小，同时减小了产生MR图像所需的超导磁体的尺寸和重量，并因此降低了超导磁体的成本。

98. 发明授权

US5045826A Actively shielded magnetic resonance magnet without cryogens 失效
标题翻译：积极屏蔽磁共振磁体无冷冻
公开(公告)号：US5045826A
公开(公告)日：1991-09-03
申请号：US504822
申请日：1990-04-05
申请人： Evangelos T. Laskaris
发明人： Evangelos T. Laskaris
IPC分类号： H01F6/00 , G01R33/3815 , G01R33/421 , H01F6/04
CPC分类号： G01R33/3815 , G01R33/421 , Y10S505/879
摘要： An actively shielded refrigerated superconductive magnet is provided. The magnet includes a generally cylindrical vacuum vessel having an axially extending bore. A plurality of superconductive main coils are positioned in the vacuum vessel concentrically surrounding and spaced away from the bore. A pair of superconductive shield coils having a larger diameter than the superconductive main coils are situated in the vacuum vessel, concentric with the superconductive main coils. The superconductive shield coils are situated at either end of the superconductive main coils. The superconductive shield coils and the superconductive main coils are electrically connected to one another so that the superconductive shield coils and the superconductive main coils are capable of carrying current in opposite circumferential directions. A thermal shield encloses the superconductive main and shield coils, with the thermal shield spaced away from the vacuum vessel and superconductive main and shield coils. A two stage cryocooler is provided for cooling the superconductive main and shield coils, and the thermal shield.

99. 发明授权

US4986078A Refrigerated MR magnet support system 失效
标题翻译：制冷MR磁体支撑系统
公开(公告)号：US4986078A
公开(公告)日：1991-01-22
申请号：US395637
申请日：1989-08-17
申请人： Evangelos T. Laskaris
发明人： Evangelos T. Laskaris
IPC分类号： H01F6/00 , A61B5/055 , F17C3/08 , F17C13/00 , F25D19/00 , G01R33/3815 , H01F6/04 , H01F7/02
CPC分类号： G01R33/3815 , F17C3/085 , F25D19/006 , H01F6/04 , F17C2203/0391 , F17C2203/0687 , F17C2223/0161 , F17C2227/0353 , F17C2227/045 , Y10S505/892
摘要： A magnet cartridge and thermal shield are supported by three concentric nested thin wall tubes from a vacuum vessel. The innermost tube of thermal insulating material is affixed to magnet cartridge at one end and supports the first stage heat station at the other. The intermediate tube of heat conducting material transfers the load from the inner tube to the outer tube which is affixed to the vacuum vessel. The intermediate tube also thermally connects the first stage heat station to the thermal radiation shield. The outer tube also supports the thermal radiation shield. All of the tube joints rely on epoxy-bonded threads to provide good mechanical strength, low motion thermal contact resistance, and no relative motion.

100. 发明授权

US4971949A Electromagnetic launcher 失效
标题翻译：电磁发射器
公开(公告)号：US4971949A
公开(公告)日：1990-11-20
申请号：US369495
申请日：1989-06-21
申请人： Evangelos T. Laskaris , Madabushi V. K. Chari
发明人： Evangelos T. Laskaris , Madabushi V. K. Chari
IPC分类号： F41B6/00 , F41F3/10
CPC分类号： F41F3/10 , F41B6/00 , Y10S505/876 , Y10S505/91
摘要： A toroidal circumferentially wound superconducting coil is provided for generating a constant magnetic field with a significant radial field component. A room-temperature resistive coil wound circumferentially and connected to launch activating means is coaxial with the superconductive coil. Interaction of the current in the resistive coil with the radial field component of the superconductive coil produces an axial force on the resistive coil and in turn on the launch activating means. The axial force is controllable in magnitude and direction by controlling the magnitude and direction of the current supplied to the resistive coil.
摘要翻译：提供环形圆周缠绕超导线圈以产生具有显着径向场分量的恒定磁场。围绕圆周并连接到发射激活装置的室温电阻线圈与超导线圈同轴。电阻线圈中的电流与超导线圈的径向场分量的相互作用在电阻线圈上产生轴向力，并且在发射激活装置上产生轴向力。通过控制提供给电阻线圈的电流的大小和方向，可以在大小和方向上控制轴向力。

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