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    • 3. 发明授权
    • Miniature ultrasonic transducer for removal of intravascular plaque and
clots
    • 用于去除血管内斑块和凝块的微型超声换能器
    • US5431663A
    • 1995-07-11
    • US164255
    • 1993-12-08
    • Robert E. Carter
    • Robert E. Carter
    • A61B17/22
    • A61B17/2202A61B2017/22021
    • Ultrasonic apparatus for clot dissolution and plaque ablation includes a radiator for coupling ultrasonic waves into plaque and a piezoelectric crystal, connected with said radiator, for the intravascular generation of ultrasonic waves; said ultrasonic waves being propagated along a longitudinal axis of said piezoelectric crystal and having an inertial node position within said piezoelectric crystal. The piezoelectric crystal is constructed in order to prevent significant power loss caused by a shifting of the inertial node of the generated ultrasonic waves to a position exterior to said piezoelectric crystal due to loading of the radiator-means caused by the coupling of ultrasonic waves into the clot or plaque.
    • 用于凝块溶解和斑块消融的超声波装置包括用于将超声波耦合到斑块中的散热器和与所述散热器连接的用于血管内产生超声波的压电晶体; 所述超声波沿着所述压电晶体的纵向轴线传播并且在所述压电晶体内具有惯性节点位置。 构造压电晶体是为了防止由于由超声波耦合到所述压电晶体而引起的散热器装置的负载而将产生的超声波的惯性节点移动到所述压电晶体外部的位置引起的显着功率损耗 凝块或斑块。
    • 6. 发明授权
    • Delayed actuator with visco-elastic timer
    • 具有粘弹性定时器的延时执行机构
    • US4791251A
    • 1988-12-13
    • US54415
    • 1987-05-26
    • Robert E. CarterPorter Stone
    • Robert E. CarterPorter Stone
    • A61L9/12H01H7/00A01G27/00F22B1/28G04C23/00
    • H01H7/00A61L9/12
    • A delayed actuator mechanism with visco-elastic timer is provided including a support section and an actuator section mounted to the support section. A compression spring biases the actuator section in a first state and permits the actuator section to be selectively switched to a second state. In that state a cocked torsion spring urges a detent carried by the actuator into engagement with a shoulder of the support section to restrain the actuator section in the second state. A visco-elastic delay mechanism gradually relaxes the torsion spring until the compression spring overcomes the detent shoulder restraint to abruptly switch the actuator section to the first state.
    • 提供了具有粘弹性定时器的延迟致动器机构,其包括支撑部分和安装到支撑部分的致动器部分。 压缩弹簧在第一状态下使致动器部分偏置并且允许致动器部分被选择性地切换到第二状态。 在该状态下,旋转的扭转弹簧促使致动器承载的制动器与支撑部分的肩部接合,以将致动器部分约束在第二状态。 粘弹性延迟机构逐渐松开扭簧,直到压缩弹簧克服止动肩限制,以将致动器部分突然切换到第一状态。