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1. 发明授权

US5318412A Flexible suspension for an oil free linear motor compressor 失效
标题翻译：无油直线电机压缩机的柔性悬挂
公开(公告)号：US5318412A
公开(公告)日：1994-06-07
申请号：US862688
申请日：1992-04-03
申请人： Evangelos T. Laskaris , Constantinos Minas
发明人： Evangelos T. Laskaris , Constantinos Minas
IPC分类号： F04B35/04 , F04B39/00 , F25B9/00
CPC分类号： F04B35/045 , Y10S417/901
摘要： This invention relates to linear motor compressors which operate without the use of oil and a gas bearing while providing a flexible suspension for such a compressor. Such structures of this type, generally, provide a highly reliable oil-free compressor for use with cryogenic refrigeration equipment so as to attain unattended, continuous operation without maintenance over extended periods of time.
摘要翻译：本发明涉及在不使用油和气体轴承的情况下工作的线性电动机压缩机，同时为这种压缩机提供柔性悬挂。这种类型的这种结构一般提供了一种用于低温制冷设备的高可靠性无油压缩机，以便在长时间不维护的情况下实现无人值守的连续操作。

2. 发明授权

US5129232A Vibration isolation of superconducting magnets 失效
标题翻译：超导磁体的隔振
公开(公告)号：US5129232A
公开(公告)日：1992-07-14
申请号：US709527
申请日：1991-06-03
申请人： Constantinos Minas , Kenneth G. Herd , Evangelos T. Laskaris
发明人： Constantinos Minas , Kenneth G. Herd , Evangelos T. Laskaris
IPC分类号： F16F15/04 , F17C13/00 , F25D19/00 , G01R33/3815 , H01F6/04
CPC分类号： F16F15/04 , F25D19/006 , G01R33/3815 , H01F6/04 , Y10S505/892
摘要： In order to improve image resolution and magnetic field uniformity in a magnetic resonance imaging device, the vibrations and loads produced by the cryocooler are isolated from the superconducting magnet and cryostat. The vibrations and loads are isolated through the use of flexible, laminated copper connectors and rubber mounts.
摘要翻译：为了提高磁共振成像装置中的图像分辨率和磁场均匀性，由低温制冷机产生的振动和负载与超导磁体和低温恒温器隔离。通过使用柔性，层压的铜连接器和橡胶支座来隔离振动和负载。

3. 发明授权

US5446433A Superconducting magnet having a shock-resistant support structure 失效
标题翻译：具有抗冲击支撑结构的超导磁体
公开(公告)号：US5446433A
公开(公告)日：1995-08-29
申请号：US309700
申请日：1994-09-21
申请人： Evangelos T. Laskaris , Constantinos Minas , Robert A. Ackermann
发明人： Evangelos T. Laskaris , Constantinos Minas , Robert A. Ackermann
IPC分类号： F17C13/00 , F25D19/00 , G01R33/38 , G01R33/3815 , H01F6/04 , H01F7/22
CPC分类号： H01F6/04 , G01R33/3815 , F25D19/006 , G01R33/3802 , Y10S505/898
摘要： A superconductive magnet having a superconductive coil located within a thermal shield located within a vacuum enclosure. A cryocooler coldhead's first stage is in solid-conductive thermal contact with the thermal shield, and its second stage is in solid-conductive thermal contact with the superconductive coil. A magnet re-entrant support assembly includes an outer support cylinder located between the vacuum enclosure and the thermal shield and includes an inner support cylinder located between the thermal shield and the superconductive coil. The outer support cylinder's first end is rigidly connected to the vacuum enclosure, and its second end is rigidly connected to the thermal shield. The inner support cylinder's first terminus is rigidly connected to the thermal shield near the outer support cylinder's second end, and its second terminus is located longitudinally between the outer support cylinder's first and second ends and is rigidly connected to the superconductive coil.
摘要翻译：一种超导磁体，其具有位于真空外壳内的热屏蔽内的超导线圈。冷冻机冷头的第一阶段是与热屏蔽件进行导电热接触，其第二阶段与超导线圈进行固体导电热接触。磁体入口支撑组件包括位于真空外壳和热屏蔽之间的外部支撑筒，并且包括位于热屏蔽和超导线圈之间的内部支撑圆柱体。外部支撑筒的第一端刚性连接到真空外壳，其第二端刚性连接到热屏蔽。内支撑筒的第一端在外支撑筒的第二端附近刚性地连接到热屏蔽，并且其第二端位于外支撑筒的第一和第二端之间的纵向位置，并且刚性地连接到超导线圈。

4. 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。

5. 发明申请

US20100277170A1 HEAT PIPE COOLED SUERCONDUCTING MAGNETS WITH CERAMIC COIL FORMS 有权
标题翻译：热管冷却带陶瓷线圈的磁铁
公开(公告)号：US20100277170A1
公开(公告)日：2010-11-04
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： G01R33/48 , G01R33/44
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。

6. 发明申请

US20100242500A1 THERMAL SWITCH FOR SUPERCONDUCTING MAGNET COOLING SYSTEM 审中-公开
标题翻译：超级磁铁冷却系统用热开关
公开(公告)号：US20100242500A1
公开(公告)日：2010-09-30
申请号：US11530267
申请日：2006-09-08
申请人： Evangelos T. Laskaris , Kathleen M. Amm , David Thomas Ryan , Xianrui Huang , J. Anne Ryan
发明人： Evangelos T. Laskaris , Kathleen M. Amm , David Thomas Ryan , Xianrui Huang , J. Anne Ryan
IPC分类号： F25B19/00 , G01R33/48
CPC分类号： F28D15/02 , F17C2270/0527 , F25D19/006 , H01F6/04 , Y02E60/321
摘要： The present invention provides an apparatus and method for automatically disconnecting a cryocooler from a cold mass reservoir of a MR system. A cryocooler thermal link includes a first end plate configured to be thermally connected to a cryocooler and a second end plate configured to be thermally connected to a cold mass. A wall encloses a space between the first and the second end plates, the wall having a first end attached to the first end plate and a second end attached to the second end plate. A working fluid is positioned in the space.
摘要翻译：本发明提供了一种用于将低温冷却器与MR系统的冷质储存器自动断开的装置和方法。低温冷却器热连接件包括构造成热连接到低温冷却器的第一端板和被配置为热连接到冷块的第二端板。壁围绕第一和第二端板之间的空间，壁具有附接到第一端板的第一端和附接到第二端板的第二端。工作流体位于空间中。

7. 发明授权

US5574417A Open MRI magnet with homogeneous imaging volume 失效
标题翻译：打开具有均匀成像体积的MRI磁体
公开(公告)号：US5574417A
公开(公告)日：1996-11-12
申请号：US547002
申请日：1995-10-23
申请人： Bizhan Dorri , Evangelos T. Laskaris
发明人： Bizhan Dorri , Evangelos T. Laskaris
IPC分类号： G01R33/38 , G01R33/3815 , H01F7/22 , G01V3/00
CPC分类号： G01R33/3806 , G01R33/3815
摘要： An open magnetic resonance imaging (MRI) magnet having first and second spaced-apart superconductive coil assemblies each including a toroidal-shaped coil housing containing a superconductive main coil. A generally annular-shaped permanent magnet array is associated with each coil assembly, being generally coaxially aligned with the associated coil assembly and being spaced radially inward and radially apart from the associated coil assembly's superconductive main coil. The permanent magnet arrays overcome the gross magnetic field distortions in the imaging volume of the superconductive main coils (created by the open space between the magnet's superconductive coil assemblies) to produce a magnetic field of high uniformity within the imaging volume.
摘要翻译：一种具有第一和第二间隔开的超导线圈组件的开放式磁共振成像（MRI）磁体，每个包括包含超导主线圈的环形线圈壳体。大致环形的永磁体阵列与每个线圈组件相关联，其大体上与相关联的线圈组件同轴对准并且相对于相关联的线圈组件的超导主线圈径向向内和径向间隔开。永磁体阵列克服了超导主线圈（由磁体超导线圈组件之间的开放空间产生）的成像体积中的总磁场失真，从而在成像体积内产生高均匀性的磁场。

8. 发明授权

US5571606A Ceramic superconducting lead resistant to breakage 失效
公开(公告)号：US5571606A
公开(公告)日：1996-11-05
申请号：US440160
申请日：1995-05-12
申请人： Robert A. Ackermann , Kenneth G. Herd , Evangelos T. Laskaris , Richard A. Ranze
发明人： Robert A. Ackermann , Kenneth G. Herd , Evangelos T. Laskaris , Richard A. Ranze
IPC分类号： B32B5/22 , F17C13/00 , F25D19/00 , G01R33/3815 , H01F6/06 , B32B9/00
CPC分类号： B32B5/22 , F25D19/006 , G01R33/3815 , H01F6/04 , H01F6/065 , Y10S428/93 , Y10S505/701 , Y10T428/24917 , Y10T428/249951 , Y10T428/2929 , Y10T428/2958
摘要： A superconductive lead assembly for a superconductive device (e.g., magnet) cooled by a cryocooler coldhead having first and second stages. A first ceramic superconductive lead has a first end flexibly, dielectrically, and thermally connected to the first stage and a second end flexibly, dielectrically, and thermally connected to the second stage. A jacket of open cell material (e.g., polystyrene foam) is in general surrounding compressive contact with the first ceramic superconductive lead, and a rigid support tube generally surrounds the jacket. This protects the first ceramic superconductive lead against shock and vibration while in the device. The rigid support tube has a first end and a second end, with the second end thermally connectable to the second stage.

9. 发明授权

US5568102A Closed superconductive magnet with homogeneous imaging volume 失效
标题翻译：封闭的超导磁体具有均匀的成像体积
公开(公告)号：US5568102A
公开(公告)日：1996-10-22
申请号：US603520
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 , G01R33/3873 , H01F6/06 , G01V3/00
CPC分类号： G01R33/3815 , G01R33/3873
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 and at least one additional superconductive main coil. A pair of generally annular-shaped permanent magnet arrays is spaced radially inward and apart from the superconductive main coils. The permanent magnet arrays allow the design of a shorter MRI magnet because the permanent magnet arrays 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，其包括包含一对超导主线圈和至少一个额外的超导主线圈的环形线圈壳体。一对大致环形的永磁体阵列径向向内并与超导主线圈隔开。永磁体阵列允许设计较短的MRI磁体，因为永久磁体阵列克服了磁体成像体积中的总磁场失真（通过去除一些附加的纵向最外面的超导主线圈而产生，否则在磁体中使用，以使磁体更短）以在成像体积内产生高均匀性的磁场。

10. 发明授权

US5563566A Cryogen-cooled open MRI superconductive magnet 失效
标题翻译：低温冷却开放MRI超导磁体
公开(公告)号：US5563566A
公开(公告)日：1996-10-08
申请号：US555952
申请日：1995-11-13
申请人： Evangelos T. Laskaris , Bizhan Dorri , Robert A. Ackermann
发明人： Evangelos T. Laskaris , Bizhan Dorri , Robert A. Ackermann
IPC分类号： G01R33/3815 , A61B5/055 , G01R33/38 , H01F6/00 , H01F7/22
CPC分类号： G01R33/3806 , G01R33/3815 , Y10S505/893
摘要： An open magnetic resonance imaging (MRI) magnet having longitudinally spaced-apart superconductive main coils surrounded by a dewar containing a cryogenic liquid (e.g., liquid helium) and boiled-off cryogenic gas (e.g., helium vapor). A condenser is in physical contact with the boiled-off vapor and is in thermal contact with a cold stage of a cryocooler coldhead so as to re-liquefy the vapor. This allows the coils to be surrounded by a single (not double) thermal shield which allows the coils structurally to be located closer to the magnet's open space which reduces magnet cost by reducing the amount of coil needed for the same-strength magnetic field.
摘要翻译：具有由包含低温液体（例如液氦）和沸腾低温气体（例如氦气））的杜瓦围绕的纵向隔开的超导主线圈的开放式磁共振成像（MRI）磁体。冷凝器与沸腾的蒸汽物理接触并与冷却器冷头的冷级热接触，以便重新液化蒸气。这允许线圈由单个（不是双重）热屏蔽围绕，其允许线圈在结构上位于更接近磁体的开放空间，从而通过减少相同强度磁场所需的线圈的数量来降低磁体成本。

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