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1. 发明授权

US5552372A Ceramic superconducting lead resistant to breakage 失效
公开(公告)号：US5552372A
公开(公告)日：1996-09-03
申请号：US439168
申请日：1995-05-11
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.

2. 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.

3. 发明授权

US5574001A Ceramic superconducting lead resistant to breakage 失效
公开(公告)号：US5574001A
公开(公告)日：1996-11-12
申请号：US439170
申请日：1995-05-11
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.

4. 发明授权

US5552211A Ceramic superconducting lead resistant to breakage 失效
标题翻译：陶瓷超导导线耐破坏
公开(公告)号：US5552211A
公开(公告)日：1996-09-03
申请号：US440159
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.
摘要翻译：一种用于超导装置（例如，磁体）的超导引线组件，其由具有第一和第二级的低温冷却器冷头冷却。第一陶瓷超导引线具有柔性，介电和热连接到第一级的第一端，以及柔性地，介电地且热连接到第二级的第二端。开孔材料（例如，聚苯乙烯泡沫）的夹套通常围绕与第一陶瓷超导导线的压力接触，并且刚性支撑管通常围绕护套。这样可以保护第一个陶瓷超导导线免受器件中的冲击和振动。刚性支撑管具有第一端和第二端，第二端与第二级热连接。

5. 发明授权

US5253413A Method for making a superconducting joint for a superconducting magnet which images human limbs 失效
标题翻译：制造超导磁体超导接头的方法，该超导磁体对人体肢体进行成像
公开(公告)号：US5253413A
公开(公告)日：1993-10-19
申请号：US347
申请日：1993-01-04
申请人： Bizhan Dorri , Evangelos T. Laskaris , Kenneth G. Herd , Richard A. Ranze
发明人： Bizhan Dorri , Evangelos T. Laskaris , Kenneth G. Herd , Richard A. Ranze
IPC分类号： H01L39/02 , H01L39/24
CPC分类号： H01L39/02 , Y10S505/925 , Y10S505/926 , Y10S505/927 , Y10T29/49014 , Y10T29/49194
摘要： This invention relates to a superconducting joint which is more commonly referred to as, a pigtail joint, for use in superconducting magnets. Such structures of this type, generally, exhibit total superconducting behavior at temperatures below the transition value of the superconducting joint and have high electrical resistance at temperatures above the transition point of the superconducting joint.
摘要翻译：本发明涉及一种超导接头，该超导接头通常被称为用于超导磁体的辫状接头。这种类型的这种结构通常在低于超导接头的转变值的温度下表现出全超导行为，并且在高于超导接头的转变点的温度下具有高的电阻。

6. 发明授权

US5410286A Quench-protected, refrigerated superconducting magnet 失效
标题翻译：淬火保护的冷冻超导磁体
公开(公告)号：US5410286A
公开(公告)日：1995-04-25
申请号：US201964
申请日：1994-02-25
申请人： Kenneth G. Herd , Evangelos T. Laskaris
发明人： Kenneth G. Herd , Evangelos T. Laskaris
IPC分类号： F17C13/00 , F25D29/00 , G01R33/3815 , H01F6/04 , H01F1/00 , F25B19/00
CPC分类号： H01F6/04 , F25D29/001 , G01R33/3815
摘要： A superconducting magnet including a superconducting coil assembly having a magnet cartridge, a cryocooler coldhead having a cold stage in thermal contact with the magnet cartridge, and a thermal buffer assembly. The thermal buffer assembly includes an inlet tube and an outlet tube each having an end connected to a helium pressure container which is placed in thermal contact with the magnet cartridge. A first gas pressure regulator on the inlet tube supplies helium gas and a second gas pressure regulator on the outlet tube vents helium gas so as to maintain a generally constant pressure for the helium gas within the helium pressure container. The high specific heat per unit volume of the pressurized gaseous helium acts as a thermal buffer to extend the time the magnet can operate superconductively without the cryocooler before quenching, such as during an electric power outage.
摘要翻译：一种超导磁体，包括具有磁体盒的超导线圈组件，具有与磁体盒热接触的冷阶段的冷却器冷头以及热缓冲组件。热缓冲器组件包括入口管和出口管，每个入口管和出口管的端部连接到与磁体盒热接触的氦压力容器。入口管上的第一气体压力调节器供应氦气，出口管上的第二气体压力调节器排出氦气，以保持氦压力容器内氦气的大致恒定的压力。加压气态氦的每单位体积的高比热作为热缓冲器，以延长磁体在淬火之前超导的时间，而不需要冷却器，例如在停电期间。

7. 发明授权

US5032869A Axial thermal shield support for a MR magnet 失效
标题翻译：用于MR磁铁的轴向热屏蔽支架
公开(公告)号：US5032869A
公开(公告)日：1991-07-16
申请号：US505631
申请日：1990-04-06
申请人： Kenneth G. Herd , Evangelos T. Laskaris , Mark E. Vermilyea
发明人： Kenneth G. Herd , Evangelos T. Laskaris , Mark E. Vermilyea
IPC分类号： H01F7/20 , F17C13/00 , G01R33/3815 , H01F6/00 , H01F6/04
CPC分类号： G01R33/3815
摘要： Two pair of thermal shield axial supports are provided. Each support includes a strand of wire brazed on either end into threaded studs. One stud is threaded into a topped hole in the end of the magnet cartridge. The stud on the other end extends through a clearance hole on the end flange of the thermal shield. Belleville spring washers are compressed against the shield by a nut. Prior to cool down, the Belleville washers are compressed. As the shield and magnet cool down, the shield contracts axially with respect to the magnet cartridge, thus relaxing the washer stack compression. The wire tension relaxes from the maximum pretension to a nominal tension at operating temperature.

8. 发明授权

US5439543A Apparatus and method for passive shimming of a superconducting magnet which images human limbs 失效
标题翻译：用于对人体肢体进行成像的超导磁体的被动匀场装置和方法
公开(公告)号：US5439543A
公开(公告)日：1995-08-08
申请号：US183375
申请日：1994-01-19
申请人： Bizhan Dorri , Evangelos T. Laskaris , Kenneth G. Herd , Raymond E. Gabis
发明人： Bizhan Dorri , Evangelos T. Laskaris , Kenneth G. Herd , Raymond E. Gabis
IPC分类号： G01R33/385 , G01R33/3873 , B65H81/00
CPC分类号： G01R33/3873 , G01R33/385
摘要： This invention relates to an apparatus and method for providing passive shimming for a superconducting magnet of the type that has a relatively small imaging volume. Such structures of this type, generally, provide the proper amount of passive shimming for a relatively small imaging volume.
摘要翻译：本发明涉及一种用于为具有相对小的成像体积的类型的超导磁体提供被动匀场的装置和方法。这种类型的这种结构通常为相对小的成像体积提供适当量的被动匀场。

9. 发明授权

US5430423A Superconducting magnet having a retractable cryocooler sleeve assembly 失效
标题翻译：超导磁体具有可缩回的低温冷却套筒组件
公开(公告)号：US5430423A
公开(公告)日：1995-07-04
申请号：US201968
申请日：1994-02-25
申请人： Kenneth G. Herd , Evangelos T. Laskaris , Paul S. Thompson
发明人： Kenneth G. Herd , Evangelos T. Laskaris , Paul S. Thompson
IPC分类号： A61B5/055 , F17C13/00 , F25D19/00 , G01R33/3815 , H01F6/04 , H01F6/06 , H01L39/04 , F17C7/02 , H01F1/00
CPC分类号： F25D19/006 , G01R33/3815 , H01F6/04
摘要： A superconducting magnet includes a cryocooler coldhead, a sleeve assembly, and a superconducting coil assembly. The sleeve assembly includes a flexible bellows and a sleeve tube and is attached to the superconducting coil assembly so that it may be retracted about one-eighth of an inch breaking thermal contact of the sleeve assembly with the coil assembly's magnet cartridge and thermal shield while remaining hermetically connected to the coil assembly's vacuum enclosure. The coldhead's housing is attached to the sleeve assembly so that the coldhead's first and second stage make unconnected thermal contact with the sleeve assembly. By first retracting the sleeve assembly, the coldhead may be removed therefrom without room temperature air forming an ice ball on the surfaces of the sleeve assembly and without a heat load being transferred to quench the superconducting coil assembly. This permits continuous magnet operation using dual coldheads and dual sleeve assemblies.
摘要翻译：超导磁体包括低温冷却器冷头，套管组件和超导线圈组件。套筒组件包括柔性波纹管和套管，并且连接到超导线圈组件，使得其可以在保持时围绕套筒组件与线圈组件的磁体盒和热屏蔽的八分之一英寸的断开热接触缩回气密地连接到线圈组件的真空外壳。冷头的壳体连接到套筒组件，使得冷头的第一和第二阶段与套筒组件形成未连接的热接触。通过首先缩回套筒组件，可以从其中移除冷头，而无需室温空气在套筒组件的表面上形成冰球，并且不传递热负荷以淬火超导线圈组件。这允许使用双冷头和双套筒组件进行连续磁铁操作。

10. 发明授权

US5304934A Superconducting magnet for imaging human limbs 失效
标题翻译：用于成像人体四肢的超导磁体
公开(公告)号：US5304934A
公开(公告)日：1994-04-19
申请号：US302
申请日：1993-01-04
申请人： Evangelos T. Laskaris , Bizhan Dorri , Kenneth G. Herd
发明人： Evangelos T. Laskaris , Bizhan Dorri , Kenneth G. Herd
IPC分类号： G01R33/3815 , G01R33/385 , G01R33/3873 , G01R33/20
CPC分类号： G01R33/3815 , G01R33/385 , G01R33/3873
摘要： This invention relates to a superconducting magnet of the type that has a relatively small imaging volume. Such structures of this type, generally, allow the operator to image human limbs without the use of a larger, more costly superconducting magnet.
摘要翻译：本发明涉及一种具有相对小的成像体积的超导磁体。这种类型的这种结构通常允许操作者在不使用更大，更昂贵的超导磁体的情况下对人体肢体进行成像。

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