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    • 3. 发明授权
    • Method and apparatus for dispensing low nanoliter volumes of liquid while minimizing waste
    • 用于分配低纳升体积的液体同时最小化废物的方法和设备
    • US06709872B1
    • 2004-03-23
    • US09562652
    • 2000-05-02
    • Robert C. DownsMark R. Weselak
    • Robert C. DownsMark R. Weselak
    • G01N110
    • B01L3/0241B01L3/021B01L2300/0829B01L2400/024B01L2400/0487Y10T436/2575
    • There is provided a method and apparatus for aspirating a volume of liquid into a syringe from a sample of the liquid. A substantial portion of the liquid in the syringe is subsequently dispensed from the syringe and returned to the sample. Accordingly, a small portion of the aspirated liquid is retained in the syringe. One or more nanoliter volumes of the liquid retained in the syringe are then dispensed from the syringe to a container for further use or analysis. It will be understood, therefore, that the volume of the originally aspirated liquid is substantially larger than the volume of liquid dispensed for further use or analysis. The invention also includes a method and apparatus for aspirating and dispensing a plurality of liquids by using a plurality of syringes, and also can be used to dispense liquids onto microplates.
    • 提供了一种从液体样品中将一定体积的液体吸入注射器的方法和装置。 随后将注射器中的大部分液体从注射器分配并返回到样品。 因此,吸入的液体的一小部分被保留在注射器中。 然后将保持在注射器中的一个或多个纳升体积的液体从注射器分配到用于进一步使用或分析的容器中。 因此,应当理解,最初吸入的液体的体积大大地大于分配用于进一步使用或分析的液体的体积。 本发明还包括通过使用多个注射器吸取和分配多种液体的方法和装置,并且还可用于将液体分配到微孔板上。
    • 4. 发明授权
    • Clutch assembly method
    • 离合器装配方法
    • US5054186A
    • 1991-10-08
    • US597920
    • 1990-10-12
    • Mark R. Weselak
    • Mark R. Weselak
    • B23P19/00B23P21/00F16D25/0638
    • F16D25/0638B23P19/001B23P21/00Y10T29/4984Y10T29/49901Y10T29/53926
    • A clutch structure has a housing in which is slidably disposed a fluid-operated piston, a plurality of inner and outer splined friction plates and a return spring assembly. The friction plates have formed thereon a spline portion such that alternating discs have the splines extending radially outward, engaging the housing, or extending radially inward, away from the housing. The clutch structure is assembled by positioning the clutch housing in a fixture composed of a ring which is sized to accommodate the outer spline of the one set of friction plates. The plates are arranged in two vertical stacks with the inner splined plates in one stack and the outer splined plates in the other. The plates are alternately installed in the housing by descending from the stacks solely by the force of gravity until a desired number of plates have been installed. The piston and a pressure plate can be installed in the housing prior to mounting the housing to the fixture, if desired. The return spring assembly and a backing plate are installed in the housing after the clutch plates have been installed.
    • 离合器结构具有壳体,其中可滑动地设置流体操作的活塞,多个内花键摩擦片和外花键摩擦片和复位弹簧组件。 摩擦片在其上形成有花键部分,使得交替的盘具有径向向外延伸的花键,与壳体接合或径向向内延伸远离壳体。 通过将离合器壳体定位在由环组成的固定件中来组装离合器结构,该环的尺寸适于容纳一组摩擦板的外花键。 板被布置在两个垂直堆叠中,内部花键板在一个堆叠中,外部花键板在另一个堆叠中。 这些板通过仅通过重力直接从堆叠下降而交替地安装在壳体中,直到安装了所需数量的板。 如果需要,活塞和压板可以在将外壳安装到固定装置之前安装在外壳中。 离合器片安装后,复位弹簧组件和背板安装在外壳中。