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    • 4. 发明授权
    • Integrated bearing assembly
    • 集成轴承总成
    • US06940947B1
    • 2005-09-06
    • US10235457
    • 2002-09-05
    • David H. HumberSteve G. BandyClifford K. NishimotoGary F. Virshup
    • David H. HumberSteve G. BandyClifford K. NishimotoGary F. Virshup
    • H01J35/10
    • H01J35/101H01J2235/1066
    • An integrated bearing assembly is provided, comprising a bearing housing defining an axial cavity in which a shaft is disposed. The shaft is rotatably supported by at least two bearing sets. The axial cavity defines three regions, each having distinct diameters. A pair of first regions defines cavity diameters sufficient to receive the bearing sets. A pair of second regions defines cavity diameters such that a small gap is defined between the inner surface of the cavity and the shaft. The third region cooperates with the shaft to define a cylindrical volume containing a coolant. Wettable coatings are utilized in the cylindrical volume to allow free flow of, and maximum contact with, the coolant. Non-wettable coatings are provided in the second regions to contain the coolant. The second regions also function as bearing spacers, thus simplifying bearing assembly design, assembly, and performance.
    • 提供了一种集成的轴承组件,其包括轴承壳体,所述轴承壳体限定轴设置轴向腔体。 轴由至少两个轴承组可旋转地支撑。 轴向腔体限定三个区域,每个区域具有不同的直径。 一对第一区域限定足以容纳轴承组件的腔直径。 一对第二区域限定空腔直径,使得在空腔的内表面和轴之间限定小的间隙。 第三区域与轴配合以限定包含冷却剂的圆柱形容积。 可润滑的涂层用于圆柱体积,以允许冷却剂的自由流动和最大程度的接触。 在第二区域中提供不可润湿的涂层以容纳冷却剂。 第二个区域也起到轴承间隔,从而简化了轴承组装的设计,组装和性能。
    • 6. 发明授权
    • Motor driven tuning and matching of RF coils in an NMR probe
    • 在NMR探头中进行电机驱动调谐和RF线圈匹配
    • US06323647B1
    • 2001-11-27
    • US09397366
    • 1999-09-16
    • Weston A. AndersonHoward D.W. HillCoriolan I. FrumDavid H. Humber
    • Weston A. AndersonHoward D.W. HillCoriolan I. FrumDavid H. Humber
    • G01V300
    • G01R33/3628
    • An apparatus for tuning and/or matching a RF coil in a NMR probe comprising a first variable capacitor electrically connected to the coil and a first motor capable of coupling to the first variable capacitor. The first motor when coupled to the first capacitor adjusts a capacitance associated with the first capacitor. The first motor is capable of operating in a strong magnetic field and is capable of not disturbing homogeneity of said magnetic field when said motor is not operating. The apparatus may further include a second variable capacitor and a second motor. The first motor is further capable of coupling to the second capacitor for adjusting a capacitance associated with the second capacitor. The second motor moves the first motor between coupling with the first capacitor and coupling with the second capacitor. The mechanism may be employed to manipulate variable inductive loads for tuning and/or matching.
    • 一种用于调谐和/或匹配NMR探针中的RF线圈的装置,包括电连接到线圈的第一可变电容器和能够耦合到第一可变电容器的第一电机。 耦合到第一电容器的第一电动机调节与第一电容器相关联的电容。 第一电动机能够在强磁场中操作,并且当所述电动机不工作时能够不干扰所述磁场的均匀性。 该装置还可以包括第二可变电容器和第二电动机。 第一电动机还能够耦合到第二电容器,用于调节与第二电容器相关联的电容。 第二电动机使第一电动机与第一电容器耦合并与第二电容器耦合。 该机构可用于操纵用于调谐和/或匹配的可变感应负载。