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    • 3. 发明申请
    • ROTATIONAL ATHERECTOMY DEVICE WITH FRICTIONAL CLUTCH HAVING MAGNETIC NORMAL FORCE
    • 具有磁性正常力的摩擦离合器的旋转自行车装置
    • WO2011041010A3
    • 2012-04-12
    • PCT/US2010041787
    • 2010-07-13
    • CARDIVASCULAR SYSTEMSGRUBAC VLADIMIRDOBROVOLNY WALTER JOHNSCHOENLE VICTOR LEO
    • GRUBAC VLADIMIRDOBROVOLNY WALTER JOHNSCHOENLE VICTOR LEO
    • A61B17/22
    • A61B17/320758A61B17/3207A61B2017/00398A61B2017/00477A61B2017/00858A61B2017/00876A61B2017/320766
    • An atherectomy device is disclosed, with a clutch between the motor and the drive shaft. The clutch includes two plates that rely on frictional to transmit torque from one plate to the other. The clutch has an attractive magnetic normal force that holds the plates together. For relatively low torques, as is the case during normal use, a static frictional torque holds the plates together, and the plates spin together without slipping. For relatively high torques, as occurs when the distal end of the drive shaft encounters an obstacle and stops abruptly, the high torque exceeds the maximum possible static frictional torque, and the plates slip. When slipping, the plates transmit a kinetic frictional torque that is low enough to avoid damage to the patient or to the atherectomy device. In some cases, the torque levels associated with a stoppage of the drive shaft distal end are chosen to mimic those of a known atherectomy device, in which a gas-driven turbine is clutchlessly attached to the drive shaft.
    • 公开了一种粥样斑块切除装置,其中电动机和驱动轴之间具有离合器。 离合器包括依靠摩擦从两个板向另一个板传递扭矩的两个板。 离合器具有吸引力的法向力,将板保持在一起。 对于相对较低的扭矩,如正常使用情况下,静摩擦转矩将板保持在一起,并且板旋转在一起而不滑动。 对于相对较高的扭矩,当驱动轴的远端遇到障碍物而突然停止时,高扭矩超过最大可能的静摩擦转矩,并且板滑动。 当滑动时,板传递足够低的动力学摩擦转矩,以避免对患者或动脉粥样硬化切除装置造成伤害。 在一些情况下,与驱动轴远端的停止相关联的扭矩水平被选择为模拟已知的粥样斑块切除装置的扭矩水平,其中气体驱动涡轮机无离子地附接到驱动轴。