公开(公告)号：US4437859A

公开(公告)日：1984-03-20

申请号：US287861

申请日：1981-08-03

申请人： Craig M. Whitehouse ,  Nigel Cox ,  Allan G. Burt ,  Daniel R. Snyder

发明人： Craig M. Whitehouse ,  Nigel Cox ,  Allan G. Burt ,  Daniel R. Snyder

IPC分类号： A61M5/145 ,  A61M1/00

CPC分类号： A61M5/14526 ,  A61M2005/14264 ,  A61M2005/14506 ,  A61M2005/14513 ,  A61M5/1456

摘要： A syringe driving unit comprising free pistons in interconnected cylindrical chambers, one of the pistons carrying a syringe plunger driver and being biased, directly or indirectly, in the driving direction, and one piston being movable to force both pistons into primed or loaded position, the connections between the chambers including a pressure regulator, flow regulator and a needle valve to regulate adjustably the return flow or hydraulic fluid corresponding to the movement of the driving piston. The priming piston may be moved mechanically or pneumatically, and fail-safe mechanism may be provided, if needed, to become effective in case of leakage. Bolus delivery, to augment optionally the adjusted flow, is also provided for.

摘要翻译： 注射器驱动单元，其包括在相互连接的圆柱形腔室中的自由活塞，其中一个活塞承载注射器柱塞驱动器，并且在驱动方向上被直接或间接地偏压，并且一个活塞可移动以迫使两个活塞进入起动或加载位置， 腔室之间的连接包括压力调节器，流量调节器和针阀，以可调节地调节与驱动活塞的运动相对应的回流或液压流体。 起动活塞可以机械地或气动地移动，并且如果需要，可以提供故障安全机构以在泄漏的情况下变得有效。 还提供了膨胀输送，以便可选地增加经调整的流量。

公开(公告)号：US6119726A

公开(公告)日：2000-09-19

申请号：US339509

申请日：1999-06-24

申请人： Nigel Cox ,  John Keeler

发明人： Nigel Cox ,  John Keeler

IPC分类号： F16K3/26 ,  F16K11/078 ,  F16K11/02

CPC分类号： F16K3/265 ,  F16K11/078

摘要： An apparatus and method for effecting transfer of fluid from any one of a plurality of fluid sources to single fluid outlet. The apparatus comprises a valve head having (i) a bore longitudinally extending therethrough, (ii) a plurality of radially extending fluid channels, each channel having an inlet in fluid communication with a corresponding fluid source and an outlet in communication with the bore, and (iii) a valve head fluid outlet in communication with the bore, a valve stem movably disposed within the bore of the valve head, the valve stem having an axially extending fluid channel that has a fluid outlet in communication with the valve head fluid outlet and a fluid inlet, and a valve control system for effecting rotation and axial displacement of the valve stem so as to effect or terminate fluid communication between the valve stem fluid inlet and a fluid outlet of any one of the radially extending fluid channels. The valve control system is configured to effect rotation of the valve stem from a current position directly to any other position without stopping at intervening positions. In a preferred embodiment, the valve head further includes a longitudinally extending channel that has an inlet coupled to the bore and an outlet coupled to a vacuum source to effect removal of fluid residue from the bore.

摘要翻译： 一种用于实现将流体从多个流体源中的任何一个流体输送到单个流体出口的装置和方法。 该装置包括阀头，其具有（i）纵向延伸穿过其中的孔，（ii）多个径向延伸的流体通道，每个通道具有与相应的流体源流体连通的入口和与孔连通的出口，以及 （iii）与所述孔连通的阀头流体出口，可移动地设置在所述阀头的孔内的阀杆，所述阀杆具有轴向延伸的流体通道，所述流体通道具有与所述阀头流体出口连通的流体出口， 流体入口和阀控制系统，用于实现阀杆的旋转和轴向位移，以便实现或终止阀杆流体入口与任何一个径向延伸的流体通道的流体出口之间的流体连通。 阀控制系统构造成使得阀杆从当前位置直接转动到任何其它位置而不停止在中间位置。 在优选实施例中，阀头还包括纵向延伸通道，其具有联接到孔的入口和连接到真空源的出口，以实现从孔中去除流体残留物。