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    • 5. 发明授权
    • Needle assemblies
    • 针组件
    • US5941853A
    • 1999-08-24
    • US904451
    • 1997-07-31
    • Michael Norman Collins
    • Michael Norman Collins
    • A61B17/34A61M25/00A61M25/06A61M19/00
    • A61B17/3401A61B2017/347A61M2025/0007A61M25/06
    • A spinal-epidural needle assembly has a rearwardly-extending sleeve on the epidural needle that is rotatable to a limited extent on its hub and that has a series of circumferentially-extending ribs on its outer surface. The spinal needle has a collar extending forwardly from its hub and slidable along outside of the sleeve of the epidural needle. The collar has a small elastomeric pad on its inner surface, which is slidable along a smooth region to one side of the ribbed region. The spinal needle is locked longitudinally relative to the epidural needle by twisting its collar so that the elastomeric pad slides laterally over the ribbed region with the ribs gripping into the pad.
    • 脊椎硬膜外针组件在硬膜外针上具有向后延伸的套筒,该套筒可在其毂部上以有限的范围旋转,并且在其外表面上具有一系列周向延伸的肋条。 脊柱针具有从其轮毂向前延伸的轴环,并且能够沿着硬膜外针的套筒的外侧滑动。 套环在其内表面上具有小的弹性垫,其可沿着平滑区域滑动到肋状区域的一侧。 脊柱针通过扭转其套环而相对于硬膜外针被纵向锁定,使得弹性垫在横向上在肋状区域上滑动,并且肋被夹紧到垫中。
    • 9. 发明授权
    • Electrical apparatus
    • 电气设备
    • US5854731A
    • 1998-12-29
    • US981259
    • 1997-12-22
    • Kevin Paul Thomas
    • Kevin Paul Thomas
    • H02H3/08H02H3/087H02H6/00H02H5/00
    • H02H6/00
    • An electrical system has a solid state switch controlled by a circuit emulating the thermal sensor of an electrothermal circuit breaker. A current sensor senses current flowing through the switch. In one arrangement, the current sensor supplies an output to a multiplier, which derives a voltage representative of a current squared, this being supplied to a resistor capacitor circuit having a time constant emulating the thermal sensor. In another arrangement, the output of the current sensor is supplied via an A/D converter to a processor that calculates the difference between heat gain and heat loss of the emulated thermal sensor. The switch is opened when the emulated temperature exceeds a threshold.
    • PCT No.PCT / GB96 / 01645 Sec。 371 1997年12月22日第 102(e)日期1997年12月22日PCT提交1996年7月10日PCT公布。 出版物WO97 / 04511 日期1997年2月6日电气系统具有通过模拟电热断路器的热传感器的电路控制的固态开关。 电流传感器感测流过开关的电流。 在一种布置中,电流传感器向乘法器提供输出,乘法器将代表电流平方的电压提供给具有模拟热传感器的时间常数的电阻电容器电路。 在另一种布置中,电流传感器的输出通过A / D转换器提供给计算仿真热传感器的热增益和热损失之差的处理器。 当模拟温度超过阈值时,开关打开。