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81. 发明授权

US4635451A Spring loaded valve for adding cryogenic liquid to a cryostat 失效
标题翻译：用于向低温恒温器加入低温液体的弹簧加载阀
公开(公告)号：US4635451A
公开(公告)日：1987-01-13
申请号：US826051
申请日：1986-02-04
申请人： Evangelos T. Laskaris
发明人： Evangelos T. Laskaris
IPC分类号： F17C9/00 , F25B19/00
CPC分类号： F17C9/00 , F17C2203/0687 , F17C2221/014 , F17C2221/017 , F17C2270/0536 , Y10S505/897
摘要： A spring loaded valve for use with a cryostat insert is provided for selectively directing liquid cryogen to the bottom or top of a supercoolable vessel. The spring loaded valve situated at the tip of the insert extends into a housing in the top of the supercoolable vessel. A slidably mounted sleeve extends inside a cryogen fill tube. The sleeve is spring loaded and when the valve is inserted in the housing the fill tube covers apertures in the sleeve allowing fluid to flow from the fill tube through the end of the housing past the valve head. When the spring loaded valve is partially retracted from the housing the holes in the sleeve are uncovered and liquid can flow from the fill tube to a passageway in the housing extending to the bottom of the supercoolable vessel. The valve closes the aperture leading to the upper portion of the vessel.
摘要翻译：提供用于低温恒温器插入件的弹簧加载阀，用于选择性地将液体冷冻剂引导到过冷却容器的底部或顶部。位于刀片尖端的弹簧加载阀延伸到过冷却容器顶部的壳体中。可滑动安装的套筒延伸在冷冻剂填充管内。套筒是弹簧加载的，并且当阀被插入壳体中时，填充管覆盖套筒中的孔，允许流体从填充管流过壳体的端部经过阀头。当弹簧加载的阀部分地从壳体缩回时，套筒中的孔未被覆盖，并且液体可以从填充管流动到壳体中延伸到过冷却容器的底部的通道。阀关闭通向容器上部的孔。

82. 发明授权

US4526015A Support for cryostat penetration tube 失效
标题翻译：支持低温恒温穿透管
公开(公告)号：US4526015A
公开(公告)日：1985-07-02
申请号：US661013
申请日：1984-10-15
申请人： Evangelos T. Laskaris
发明人： Evangelos T. Laskaris
IPC分类号： F17C6/00 , F17C3/08 , F17C13/08 , F25B19/00
CPC分类号： F17C13/087 , F17C3/085 , F17C2203/0391 , F17C2203/0687 , F17C2221/017 , F17C2223/0161 , F17C2270/0536 , Y10S220/901 , Y10S285/904 , Y10S505/892
摘要： Penetration tubes extending between inner and outer walls of a cryostat necessarily comprise thin walled structures to minimize thermal conduction. However, in cryostat structures in which the inner vessel is capable of undergoing the relative motion with respect to the outer vessel, particularly during transport and thermal contraction, a means of accommodating this motion must be found which does not impose significant stresses on the thin walled penetration tube. Accordingly, the present invention provides a bearing and bellows arrangement which accommodates axial motion, thermal expansion and contraction and rocking motions of the inner cryostat, while at the same time ensuring the maintenance of vacuum conditions between the cryostat walls.
摘要翻译：在低温恒温器的内壁和外壁之间延伸的穿透管必须包括薄壁结构以最小化热传导。然而，在内容器能够相对于外容器进行相对运动的低温恒温器结构中，特别是在运输和热收缩期间，必须发现容纳该运动的装置，其不会在薄壁上施加显着的应力穿透管。因此，本发明提供一种轴承和波纹管装置，其适应内部低温恒温器的轴向运动，热膨胀和收缩以及摇摆运动，同时确保维持低温恒温器壁之间的真空条件。

83. 发明授权

US4291997A Flexible support for superconducting machine rotor 失效
标题翻译：超导机器转子的灵活支撑
公开(公告)号：US4291997A
公开(公告)日：1981-09-29
申请号：US878791
申请日：1978-02-17
申请人： Evangelos T. Laskaris
发明人： Evangelos T. Laskaris
IPC分类号： H02K55/04 , H02K9/00
CPC分类号： H02K55/04 , Y02E40/625 , Y10T403/18 , Y10T403/21
摘要： In a superconducting machine, differential thermal alterations in axial length of the torque tube, together with angular deflections thereof with respect to the rotor electromagnetic shield, are accommodated by a flexible support having a thin-wall circular diaphragm extending radially from an axially-oriented torsion shaft. The support structure acts as a stiff brace for the torque tube in the radial direction, so as not adversely to affect the rotor critical speeds.
摘要翻译：在超导机器中，扭矩管的轴向长度的差异热改变及其相对于转子电磁屏蔽的角度偏转由柔性支撑件容纳，该柔性支撑件具有从轴向取向扭转径向延伸的薄壁圆形隔膜轴。支撑结构作为扭矩管在径向方向上的刚性支架，从而不会不利地影响转子临界速度。

84. 发明授权

US4279944A Epoxy impregnated ventilated winding 失效
标题翻译：环氧浸渍通风绕组
公开(公告)号：US4279944A
公开(公告)日：1981-07-21
申请号：US973415
申请日：1978-12-26
申请人： Evangelos T. Laskaris
发明人： Evangelos T. Laskaris
IPC分类号： H02K3/24 , H02K55/04 , H02K1/20
CPC分类号： H02K3/24 , H02K55/04 , H01F2027/328 , H02K2203/15 , Y02E40/625 , Y10S505/818 , Y10S505/917 , Y10S505/924 , Y10T29/49012 , Y10T29/49014 , Y10T29/49071
摘要： Cooling channels are provided within a resin impregnated superconducting winding by introducing inserts between wrappings of successive layers of superconducting winding and leaving them in place during impregnation of the winding with resinous bonding materials, and thereafter extracting the inserts from the winding. The resultant spaces within the resin provide discrete coolant passages distributed throughout the superconducting winding, thereby providing circulation paths for coolant to maintain the coil at superconducting temperatures during operation thereof, including periods of rapid change in the excitation field current.
摘要翻译：通过在连续的超导绕组层之间引入插入件并在树脂粘合材料浸渍绕组期间将它们留在适当位置之后，在树脂浸渍的超导绕组内提供冷却通道，然后从绕组中提取插入件。树脂内的合成空间提供分布在整个超导绕组上的分散的冷却剂通道，从而为冷却剂提供循环路径，以便在其运行过程中将线圈保持在超导温度，包括励磁场电流的快速变化周期。

85. 发明授权

US08085047B2 Heat pipe cooled suerconducting magnets with ceramic coil forms 有权
标题翻译：热管冷却采用陶瓷线圈形式的导磁体
公开(公告)号：US08085047B2
公开(公告)日：2011-12-27
申请号：US12268205
申请日：2008-11-10
申请人： Xianrui Huang , Bulent Aksel , Kathleen M. Amm , Evangelos T. Laskaris , Ernst W. Stautner , Paul S. Thompson , Anbo Wu , Minfeng Xu , Yan Zhao
发明人： Xianrui Huang , Bulent Aksel , Kathleen M. Amm , Evangelos T. Laskaris , Ernst W. Stautner , Paul S. Thompson , Anbo Wu , Minfeng Xu , Yan Zhao
IPC分类号： G01V3/00
CPC分类号： G01R33/3815 , G01R33/3802 , G01R33/3804
摘要： A system and method for a magnetic resonance (MR) imaging system includes a coil form, at least one magnet positioned about the coil form and configured to generate a magnetic field, at least one gradient coil for manipulating the magnetic field generated by the at least one magnet by way of a gradient field, and a heat pipe thermally connected to the coil form and having a cryogen therein. The MR imaging system also includes a cryocooler connected to the heat pipe to cool the heat pipe and the cryogen, wherein the coil form is comprised of a thermally conductive material in which eddy currents are substantially reduced during operation of the at least one gradient coil. The present invention has been described in terms of the preferred embodiment, and it is recognized that equivalents, alternatives, and modifications, aside from those expressly stated, are possible and within the scope of the appending claims.
摘要翻译：用于磁共振（MR）成像系统的系统和方法包括线圈形式，围绕线圈形状定位并被配置为产生磁场的至少一个磁体，至少一个梯度线圈，用于操纵由至少一个通过梯度场的一个磁体，以及热连接到线圈形式并且在其中具有冷冻剂的热管。 MR成像系统还包括连接到热管以冷却热管和冷冻剂的低温冷却器，其中线圈形式由导热材料组成，其中涡流在至少一个梯度线圈的操作期间显着减小。已经根据优选实施例描述了本发明，并且认识到除了明确说明的那些之外的等同物，替代方案和修改是可能的并且在所附权利要求的范围内。

86. 发明申请

US20100237868A1 APPARATUS FOR LOW AC LOSS THERMAL SHIELDING AND METHOD OF MAKING SAME 有权
标题翻译：低交流损失热屏蔽装置及其制造方法
公开(公告)号：US20100237868A1
公开(公告)日：2010-09-23
申请号：US11461544
申请日：2006-08-01
申请人： Xianrui Huang , Evangelos T. Laskaris , Paul S. Thompson , Bulent Aksel
发明人： Xianrui Huang , Evangelos T. Laskaris , Paul S. Thompson , Bulent Aksel
IPC分类号： G01R33/44 , F25B19/00 , B29C70/40
CPC分类号： G01R33/3815 , G01R33/3804
摘要： A apparatus for low AC loss thermal shielding includes a plurality of thermally conducting fibers positioned along a desired direction of heat conduction. The fibers are electrically insulated from each other. The fibers are bonded together with a matrix, and a thermal link connects the bonded fibers to a cryogenic cold head.
摘要翻译：用于低AC损耗热屏蔽的装置包括沿期望的热传导方向定位的多个导热纤维。纤维彼此电绝缘。纤维与基体结合在一起，并且热连接将结合的纤维连接到低温冷头。

87. 发明授权

US07449889B1 Heat pipe cooled superconducting magnets with ceramic coil forms 有权
标题翻译：具有陶瓷线圈形式的热管冷却超导磁体
公开(公告)号：US07449889B1
公开(公告)日：2008-11-11
申请号：US11768016
申请日：2007-06-25
申请人： Xianrui Huang , Bulent Aksel , Kathleen M. Amm , Evangelos T. Laskaris , Ernst W. Stautner , Paul S. Thompson , Anbo Wu , Minfeng Xu , Yan Zhao
发明人： Xianrui Huang , Bulent Aksel , Kathleen M. Amm , Evangelos T. Laskaris , Ernst W. Stautner , Paul S. Thompson , Anbo Wu , Minfeng Xu , Yan Zhao
IPC分类号： G01V3/00
CPC分类号： G01R33/3815 , G01R33/3802 , G01R33/3804
摘要： A system and method for a magnetic resonance (MR) imaging system includes a coil form, at least one magnet positioned about the coil form and configured to generate a magnetic field, at least one gradient coil for manipulating the magnetic field generated by the at least one magnet by way of a gradient field, and a heat pipe thermally connected to the coil form and having a cryogen therein. The MR imaging system also includes a cryocooler connected to the heat pipe to cool the heat pipe and the cryogen, wherein the coil form is comprised of a thermally conductive material in which eddy currents are substantially reduced during operation of the at least one gradient coil. The present invention has been described in terms of the preferred embodiment, and it is recognized that equivalents, alternatives, and modifications, aside from those expressly stated, are possible and within the scope of the appending claims.
摘要翻译：用于磁共振（MR）成像系统的系统和方法包括线圈形式，围绕线圈形状定位并被配置为产生磁场的至少一个磁体，至少一个梯度线圈，用于操纵由至少一个通过梯度场的一个磁体，以及热连接到线圈形式并且在其中具有冷冻剂的热管。 MR成像系统还包括连接到热管以冷却热管和冷冻剂的低温冷却器，其中线圈形式由导热材料组成，其中涡流在至少一个梯度线圈的操作期间显着减小。已经根据优选实施例描述了本发明，并且认识到除了明确说明的那些之外的等同物，替代方案和修改是可能的并且在所附权利要求的范围内。

88. 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。

89. 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。

90. 发明授权

US5410288A Persistent superconducting switch for a superconducting magnet for imaging human limbs 失效
标题翻译：用于成像人体肢体的超导磁体的持续超导开关
公开(公告)号：US5410288A
公开(公告)日：1995-04-25
申请号：US235959
申请日：1994-05-02
申请人： Bizhan Dorri , Evangelos T. Laskaris , Kenneth G. Herd
发明人： Bizhan Dorri , Evangelos T. Laskaris , Kenneth G. Herd
IPC分类号： G01R33/3815 , H01B12/00 , H01F6/00 , H01L39/02 , H01L39/20 , H01F7/22
CPC分类号： H01L39/02 , G01R33/3815 , H01F6/003 , H01L39/20
摘要： A superconductive magnet subassembly has a single unbroken length of superconductive conductor which has a mid portion wound so as to define at least one superconductive magnetic coil and which has two end portions superconductively joined together by a superconductive joint. A superconductive switch is at least partially defined by the two end portions and by a heater for controllably heating the two end portions.
摘要翻译：超导磁体子组件具有单个不间断的超导导体，其中间部分被缠绕以限定至少一个超导磁性线圈，并且具有由超导接头超导地连接在一起的两个端部。超导开关至少部分地由两个端部限定，并且由用于可控制地加热两个端部的加热器限定。

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