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    DETECTING OCCLUSION OF PROXIMAL OR DISTAL LINES OF AN IV PUMP
    2.
    发明申请
    DETECTING OCCLUSION OF PROXIMAL OR DISTAL LINES OF AN IV PUMP 审中-公开
    检测IV泵的临时或远程线路的泄漏

    公开(公告)号：WO1993004284A1

    公开(公告)日：1993-03-04

    申请号：PCT/US1992006586

    申请日：1992-08-05

    Applicant: ABBOTT LABORATORIES

    Inventor： ABBOTT LABORATORIES ,  NATWICK, Vernon, R. ,  LAWLESS, Michael, W. ,  DOLL, Joseph, E. ,  WU, Chung-You, Charles

    IPC: F04B43/12

    CPC classification number: F04B43/084 ,  A61M5/14228 ,  A61M5/16854 ,  A61M2205/14 ,  F04B43/082 ,  F04B43/123 ,  F04B49/065

    Abstract: A volumetric pump (30) includes a motor (146) that rotatably drives a cam assembly (142), which actuates a plunger (48), causing it to compress a pumping portion (34b) of a flexible tubing (34). Compression of the tubing displaces fluid trapped within the pumping portion, causing it to flow past an outlet cracking valve (52). A proximal pressure sensor (44) and a distal pressure sensor (56) each produce signals indicative of the pressure within the proximal portion and distal portion of the flexible tubing, which are used to determine whether a proximal or distal occlusion of the flexible tubing has occurred. Both pressure sensors comprise strain gauges connected to flexures that apply a spring-biased force against the proximal and distal portions of the flexible tubing. These sensors thereby respond to the cross-sectional size (diameter) of the tubing, as affected by fluid pressure therein. Proximal and distal pressures are thus monitored without violating the integrity of the flexible tubing.

    Abstract translation: 容积泵（30）包括可旋转地驱动凸轮组件（142）的马达（146），其驱动柱塞（48），使其压缩柔性管道（34）的泵送部分（34b）。 管道的压缩将捕获在泵送部分内的流体置换，使其流过出口裂解阀（52）。 近端压力传感器（44）和远端压力传感器（56）各自产生指示柔性管的近端部分和远端部分内的压力的信号，其用于确定柔性管的近端或远端闭塞是否具有 发生。 两个压力传感器都包括连接到挠性件的应变计，该挠曲件对柔性管的近端部分和远端部分施加弹簧偏压力。 这些传感器因此受到其中流体压力的影响而对管道的横截面尺寸（直径）作出响应。 因此监测近端和远端压力，而不会违反柔性管的完整性。

    METHOD FOR MONITORING FLUID FLOW FROM A VOLUMETRIC PUMP
    4.
    发明申请
    METHOD FOR MONITORING FLUID FLOW FROM A VOLUMETRIC PUMP 审中-公开
    用于监测体积流量的流体的方法

    公开(公告)号：WO1993004285A1

    公开(公告)日：1993-03-04

    申请号：PCT/US1992006585

    申请日：1992-08-05

    Applicant: ABBOTT LABORATORIES

    Inventor： ABBOTT LABORATORIES ,  NATWICK, Vernon, R. ,  LAWLESS, Michael, W. ,  DOLL, Joseph, E. ,  WU, Chung-You, Charles

    IPC: F04B49/06

    CPC classification number: A61M5/14228 ,  A61M5/142 ,  A61M5/16854 ,  A61M39/281 ,  F04B43/082 ,  F04B49/065 ,  G06F19/00 ,  Y02A90/26

    Abstract: A method for determining if fluid is being displaced by a volumetric pump. During a pumping segment of a pumping cycle for the volumetric pump, an outlet cracking valve (52) compresses the flexible tubing until the pressure of the fluid displaced by the plunger exceeds a cracking pressure, at which time the outlet cracking valve opens to enable fluid flow. A cracking flexure (182) provides the cracking force. A flow detector (54) mounted to the cracking flexure responds to the stress generated in the cracking flexure thereby, producing a signal indicative of fluid flow from the volumetric pump. The flow detector also provides an indication when a source of liquid (31) for the volumetric pump has run dry. The method comprises the steps of processing the signal to determine if it exceeds a predefined threshold that varies as a function of the rate at which the pump is set to deliver fluid.

    Abstract translation: 用于确定流体是否被体积泵移位的方法。 在用于体积泵的泵送循环的泵送段期间，出口裂解阀（52）压缩柔性管，直到由柱塞移位的流体的压力超过开启压力，此时出口裂化阀打开以使流体 流。 裂纹弯曲（182）提供了开裂力。 安装到裂缝弯曲部上的流量检测器（54）响应于裂缝挠曲中产生的应力，从而产生指示来自容积泵的流体流动的信号。 当体积泵的液体源（31）运行干燥时，流量检测器还提供指示。 该方法包括以下步骤：处理信号以确定其是否超过根据泵被设置为输送流体的速率的函数而变化的预定阈值。

    FLEXIBLE COUPLING FOR THE DRIVE UNIT SHAFT OF AN INFUSION PUMP
    5.
    发明公开
    FLEXIBLE COUPLING FOR THE DRIVE UNIT SHAFT OF AN INFUSION PUMP 有权
    灵活离合器输液泵的驱动单元

    公开(公告)号：EP1086318A1

    公开(公告)日：2001-03-28

    申请号：EP99928739.4

    申请日：1999-06-18

    Applicant: ABBOTT LABORATORIES

    Inventor： GJATA, John, D. ,  LAWLESS, Michael, W. ,  SCHERER, Andrew, J. ,  SOBERON, Peter, A. ,  SQUARCIA, Stephanie, R.

    IPC: F16D3/74 ,  A61M5/145 ,  F04B17/03

    CPC classification number: F04B17/03 ,  A61M5/14224 ,  F16D3/74 ,  Y10T403/453 ,  Y10T403/458 ,  Y10T403/5733

    Abstract: A drive connector for elastomerically coupling a drive shaft to a driven shaft. An elastomeric coupling (42) includes openings (74, 80) on opposite ends that are generally 'D'-shaped forming an interference fit with correspondingly shaped ends of the drive shaft and the driven shaft. A web (98) extends transversely within the interior of the elastomeric coupling, limiting the distance that the drive shaft and driven shaft are inserted within the openings of the coupling. The coupling includes a rib (72) that runs longitudinally along its outer length. A sleeve (86) having a groove (90) corresponding in size and shape to the rib is slipped over the coupling and is connected to the driven shaft. The sleeve includes a rigid interior element that is overmolded with an elastomeric material. A cam bearing (48) is fitted over a cam surface (96) on the sleeve (86) and provides a force in one direction, urging a plunger (58) to displace an elastomeric membrane (20) in a pumping cassette (10), forcing medicinal fluid to flow through the pumping cassette. The elastomeric membrane provides the restoring force to the plunger, so that a loop formed on the upper portion of the plunger and disposed around the cam bearing does not receive any force from the cam bearing to move the plunger away from the pump cassette. The elastomeric coupling and sleeve form a relatively compact assembly for coupling the drive shaft to the driven shaft and accommodate minor misalignment between the center lines of the drive shaft and the driven shaft.

    AIR BUBBLE SENSOR
    7.
    发明公开
    AIR BUBBLE SENSOR 有权
    气泡传感器

    公开(公告)号：EP1085922A1

    公开(公告)日：2001-03-28

    申请号：EP99927282.6

    申请日：1999-06-04

    Applicant: ABBOTT LABORATORIES

    Inventor： COLE, Martin, A. ,  LAWLESS, Michael, W. ,  LYNCH, Christopher, D. ,  MO, Frank, S., C. ,  SOBERON, Peter, A.

    IPC: A61M5/36 ,  G01N29/02

    CPC classification number: A61M5/365 ,  A61M2205/12 ,  G01N29/02 ,  G01N29/222 ,  G01N2291/02433 ,  G01N2291/102 ,  Y10S128/13

    Abstract: A system and a method for detecting the presence of air bubbles in an intravenous (IV) line supplying a medicinal liquid to a patient. An air bubble sensor includes an ultrasonic transmitter acoustically coupled to an ultrasonic receiver to detect the presence of a gas (e.g., air) in a portion of a tube comprising the IV line. The transmitter and receiver are mounted on pivoting transducers that are disposed on opposite sides of the tube. A spring biases the transducers inwardly toward each other so that the transmitter and receiver contact opposite sides of the tubing. This assembly automatically accommodates different sizes of tubing and tubing of a relatively wide range of stiffness. The tube is connected to a disposable pumping cassette that is engaged in a pump chassis on which the transducers are pivotally mounted. A user actuated plunger on the pump chassis is depressed to cause the transmitter and receiver to move away from the tube when the pumping cassette is removed from or inserted into the interior of the pump chassis. A controller precisely monitors the flow of medicinal liquid through the tubing to detect the size of gas bubbles and total volume of gas infused. The controller automatically compensates for minor contamination of the exterior surface of the tube, e.g., if the surface is wet with a liquid.

    WATERTIGHT BATTERY COMPARTMENT COVER WITH LATCH ACTUATED O-RING SEAL
    10.
    发明公开
    WATERTIGHT BATTERY COMPARTMENT COVER WITH LATCH ACTUATED O-RING SEAL 有权
    防水电池厂覆盖通过锁定操作的O型圈密封

    公开(公告)号：EP1090432A1

    公开(公告)日：2001-04-11

    申请号：EP99928403.7

    申请日：1999-06-04

    Applicant: ABBOTT LABORATORIES

    Inventor： HERMANN, Robert, A. ,  LAWLESS, Michael, W. ,  SOBERON, Peter, A.

    IPC: H01M2/10

    CPC classification number: H01M2/1022

    Abstract: A cover for a battery compartment in a medical device such as an ambulatory pump that is used for infusing a medicinal fluid. The battery compartment cover includes a lever (18) that is pivotal between an open and a closed position. The lever is connected to a plunger (22) that applies a compressive force against an O-ring, which is trapped between a shoulder on a washer through which the plunger extends and an end of the plunger. When the lever is pivoted to its open position, the compressive force on the O-ring is released, enabling the battery compartment cover to be removed from the opening into the battery compartment. However, when the lever is pivoted to its closed position, it draws the plunger outwardly, applying a compressive force to the O-ring that causes the O-ring to expand radially outward, sealing the opening into the battery compartment against the intrusion of water or other liquids and securing the battery compartment cover in engagement with the opening.

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