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    • 2. 发明授权
    • Microneedle array module and method of fabricating the same
    • US06790372B2
    • 2004-09-14
    • US10162848
    • 2002-06-05
    • Shuvo RoyAaron J. Fleischman
    • Shuvo RoyAaron J. Fleischman
    • B61C100
    • B81C1/00111A61M37/0015A61M2037/003A61M2037/0038A61M2037/0053B81B2201/055
    • A microneedle array module is disclosed comprising a multiplicity of microneedles affixed to and protruding outwardly from a front surface of a substrate to form the array, each microneedle of the array having a hollow section which extends through its center to an opening in the tip thereof. A method of fabricating the microneedle array module is also disclosed comprising the steps of: providing etch resistant mask layers to one and another opposite surfaces of a substrate to predetermined thicknesses; patterning the etch resistant mask layer of the one surface for outer dimensions of the microneedles of the array; patterning the etch resistant mask layer of the other surface for inner dimensions of the microneedles of the array; etching unmasked portions of the substrate from one and the other surfaces to first and second predetermined depths, respectively; and removing the mask layers from the one and the other surfaces. One embodiment of the method includes the steps of: providing an etch resistant mask layer to the other surface of the substrate to a predetermined thickness; patterning the etch resistant mask layer of the other surface to define a reservoir region in the substrate; and etching away the unmasked reservoir region of the substrate to form a reservoir well in the other surface of the substrate. A layer of material may be provided to the other surface to enclose the reservoir well and a passageway is provided through the layer to the well region.
    • 3. 发明授权
    • AC drive industrial switching locomotive
    • 交流驱动工业切换机车
    • US06267062B1
    • 2001-07-31
    • US09281035
    • 1999-03-30
    • Hugh B. Hamilton, Jr.
    • Hugh B. Hamilton, Jr.
    • B61C100
    • B61C7/04Y02T30/16
    • The two axle locomotive of this invention includes a diesel engine directly coupled to a generator for generating power to a single electrical traction motor. Preferably, the drive motor is an AC traction motor which drives both axles of the locomotive using a single drive shaft assembly with a drive shaft affixed to an armature of the AC traction motor. Power to the AC traction motor is controlled by using a variable frequency alternating current control system. Auxiliary equipment power is also provided by the AC generator. In addition, by reversing the current in the AC traction motor the motor becomes an AC braking motor. Changes in the traction ability of each axle resulting from weight transfer between the two axles is automatically compensated for by the single drive shaft assembly. The suspension system includes a locomotive frame supported by the pair of axles using elastomeric springs, which also provides dynamic damping to limit the motion of the locomotive. The locomotive frame has a horizontal platform having two portions which allow the locomotive to be disassembled, shipped and reassembled at a remote location for its intended use.
    • 本发明的双轴机车包括直接联接到发电机的柴油发动机,用于向单个牵引电动机发电。 优选地,驱动电动机是AC牵引电动机,其使用单个驱动轴组件驱动机车的两个轴,驱动轴固定到AC牵引电动机的电枢。 通过使用变频交流电控制系统来控制交流牵引电动机的电力。 辅助设备电源也由交流发电机提供。 另外,通过反转交流牵引电动机的电流,电动机成为交流制动电动机。 由两个轴之间的重量传递导致的每个轴的牵引能力的变化由单个驱动轴组件自动补偿。 悬架系统包括使用弹性弹簧由一对轴支撑的机车框架,其还提供动态阻尼以限制机车的运动。 机车框架具有水平平台,其具有两部分,其允许机车在远程位置被拆卸,运输和重新组装以用于其预期用途。