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    • 6. 发明申请
    • BLOOD PUMP BEARINGS WITH SEPARATED CONTACT SURFACES
    • 带独立接触表面的血液泵轴承
    • WO2009010888A3
    • 2009-11-19
    • PCT/IB2008003076
    • 2008-04-21
    • JARVIK ROBERT
    • JARVIK ROBERT
    • A61M1/00
    • F04D13/0633A61M1/101A61M1/1013A61M1/1017A61M1/1031A61M1/122A61M1/125F04D3/00F04D29/0467F16C17/08F16C2316/18
    • Rotary hydrodynamic blood pumps have been used to treat over a thousand patients. The Jarvik 2000 has supported a patient for seven years and uses blood immersed bearings washed by high flow to avoid excessive thrombus formation. This permits the pump to be very simple and small. Nonetheless, the present Jarvik 2000 bearings and all other mechanical blood immersed bearings of the prior art have a supporting structure that predisposes to thrombus adjacent to the bearings. The present invention provides a bearing structure that eliminates this predilection site for thrombus formation, and may provide indefinite thrombus free operation. The rotor of the preferred embodiment includes a tapered hub fabricated of wear resistant material supported by three posts at each end of the rotor, upon which the rotor rotates. Blood washes the unobstructed spaces between the posts to prevent the accumulation of a torus of thrombus that could enlarge excessively.
    • 旋转流体动力学血泵已被用于治疗一千多名患者。 Jarvik 2000支持了7年的患者,并使用高流量清洗的血液浸没的轴承,以避免血栓形成过多。 这样可以使泵非常简单和小型化。 尽管如此,现有的Jarvik 2000轴承和所有其他现有技术的机械血液浸入轴承具有易于与轴承相邻的血栓的支撑结构。 本发明提供了一种消除这种血栓形成倾向的轴承结构,并且可以提供无限制的无血栓操作。 优选实施例的转子包括由转子的每个端部处的三个支柱支撑的耐磨材料制成的锥形轮毂,转子在其上旋转。 血液清洗柱之间的无障碍空间,以防止可能过度放大的血栓环面积聚。
    • 8. 发明申请
    • SEAL AND BEARING-FREE FLUID PUMP INCORPORATING A PASSIVELY SUSPENDED SELF-POSITIONING IMPELLER
    • 密封和无轴承的流体泵配备一个经常停止的自动定位叶轮
    • WO2004104414A8
    • 2005-01-20
    • PCT/US2004014318
    • 2004-05-07
    • ADVANCED BIONICS INCIZRAELEV VALENTIN
    • IZRAELEV VALENTIN
    • A61M1/10F04D13/06F04D29/04F04D29/048F16C39/06F04B
    • F04D13/064A61M1/101A61M1/1015A61M1/1031A61M1/122F04D13/0633F04D29/048F16C32/0408F16C2316/18
    • A novel fluid pump comprising a stator body defining a pumping chamber and an impeller operationally disposed within the chamber. The impeller has opposed ends with a central axis defining an axis of rotation, with magnetic driven means disposed on the impeller and positioned outwardly of the impeller axis between the opposed ends. Passive magnetic bearing sets are positioned along the impeller body with each bearing set being similarly polarized so as to be in mutually attraction or mutually repelling relationship. A third passive magnetic bearing set is positioned along the impeller axis between the opposed ends with the third bearing set being magnetically coupled similarly to the first and second bearing sets, with the passive magnetic bearings creating an unstable negative force in a plane perpendicular to the axis of rotation of the impeller with the negative stiffness being overcome upon rotation of the impeller creating a centrifugal force of a magnitude greater than that of the unstable negative force.
    • 一种新颖的流体泵,包括限定泵送室的定子体和可操作地设置在室内的叶轮。 叶轮具有相对的端部,中心轴限定旋转轴线,其中磁力驱动装置设置在叶轮上并且位于相对端之间的叶轮轴线的外侧。 被动磁轴承组沿着叶轮本体定位,每个轴承组相似地极化,以便处于相互吸引或相互排斥的关系。 第三无源磁轴承组沿着叶轮轴线定位在相对端之间,其中第三轴承组与第一和第二轴承组类似地磁耦合,而被动磁轴承在垂直于轴的平面中产生不稳定的负力 在叶轮旋转时克服了负刚度的叶轮的旋转,产生了大于不稳定负力的离心力。