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    • 2. 发明申请
    • Stopcock Valve
    • 止回阀
    • US20070085049A1
    • 2007-04-19
    • US11559792
    • 2006-11-14
    • Philip HouleWilliam Larkins
    • Philip HouleWilliam Larkins
    • F16K5/00
    • A61M5/142A61M5/1409A61M5/1413A61M5/14224A61M5/16809A61M5/16827A61M5/16831A61M5/16854A61M5/16877A61M5/365A61M5/5086A61M39/24A61M2005/1402A61M2005/1403A61M2005/14208A61M2205/123A61M2205/128A61M2205/35A61M2205/8206A61M2206/22F16K5/0414F16K5/0478
    • A cassette for controlling the flow of IV fluid from a patient to a source. The cassette preferably includes, along the fluid passage through the cassette, first and second membrane-based valves on either side of a pressure-conduction chamber, and a stopcock-type valve. The stopcock valve is preferably located downstream of the second membrane-based valve, which is preferably located downstream of the pressure-conduction chamber. The stopcock control valve preferably has two rigid cylindrical members with complementary surfaces, wherein one member includes a tapered groove defined on its complementary surface. The two complementary surfaces define a space therebetween, instead of having an interference fit, and a resilient sealing member is disposed in this space. When the first and second rigid members are in an open position with respect to each other, the sealing member defines an aperture through which fluid communication is provided between the fluid-path portions defined respectively by the two rigid members. When the first and second rigid members are in the closed position with respect to each other, the sealing member provides a seal preventing flow between the fluid-path portions. The membrane defining the valving chamber of the second membrane-based valve is preferably large and resilient, so that the valving chamber may provide a supply of pressurized intravenous fluid to the patient, when the valve is closed and the stopcock valve provides a restriction downstream of the valve. The pressure-conduction chamber preferably has a membrane that is stable in the empty-chamber position but relatively unstable in the filled-chamber position.
    • 用于控制从患者到源的IV流体的流动的盒。 盒子优选地包括沿着通过盒的流体通道,在压力传导室的任一侧上的第一和第二膜基阀以及活塞式阀。 活塞阀优选地位于第二膜基阀的下游,其优选位于压力传导室的下游。 旋塞控制阀优选地具有两个具有互补表面的刚性圆柱形构件,其中一个构件包括限定在其互补表面上的锥形槽。 两个互补表面在它们之间限定了一个空间,而不是具有过盈配合,并且弹性密封构件设置在该空间中。 当第一和第二刚性构件相对于彼此处于打开位置时,密封构件限定一个孔,在两个刚性构件分别限定的流体路径部分之间设置有流体连通。 当第一和第二刚性构件相对于彼此处于关闭位置时,密封构件提供防止流体路径部分之间流动的密封件。 限定第二膜基阀的阀室的膜优选地是大的并具有弹性的,使得当阀关闭时,阀室可以向患者提供加压的静脉内流体供应,并且止动阀在下游 阀门。 压力传导室优选具有在空腔位置稳定但在填充室位置中相对不稳定的膜。
    • 4. 发明授权
    • Group III - V semiconductor devices with improved switching speeds
    • III类 - 具有改进的开关速度的V型半导体器件
    • US4935647A
    • 1990-06-19
    • US259830
    • 1988-10-19
    • William Larkins
    • William Larkins
    • H03K19/0952
    • H03K19/0952
    • To decrease the time required to charge parasitic capacitances, and to thereby increase the maximum permissible switching frequency to which a logic circuit can respond, a GaAs device is disclosed having a current-injecting circuit that generates an initial pulse of capacitor-charging current during a "0"-to-"1" transition in the output state of a GaAs device. The pulse is sufficiently large to quickly charge the parasitic capacitances, and of sufficiently brief duration so that a minimum line width is permissible which is substantially equivalent to that which would be applicable in the absence of the current-injecting circuit.
    • 为了减少对寄生电容进行充电所需的时间,并且由此增加逻辑电路可以响应的最大允许开关频率,公开了具有电流注入电路的GaAs器件,该电流注入电路在期间产生电容器充电电流的初始脉冲 GaAs器件的输出状态下的“0”到“1”跃迁。 脉冲足够大以快速充电寄生电容并且具有足够短的持续时间,使得允许的最小线宽度基本上等于在不存在电流注入电路的情况下适用的线宽。