Needleless valve

专利名称：Needleless valve发明人：John Thompson,David Ziv申请号：US08/757156申请日：19961127公开号：US05814024A公开日：19980929

摘要：A needle-less valve connector which employs a pre-slit elastomeric septumcapable of axial movement proximally and distally within a housing. Connection of a bluntconnector to the housing pushes the septum in the distal direction. A spring memberbiases the septum toward the proximal direction. The slit through the septum is held inthe closed position, when the septum is in the proximal position, by an interference fitbetween the inside surface of the housing and the peripheral surface of the septum, withthe interference fit causing an inward radial compression of the septum, orthogonal tothe slit axis. The outer, or proximal, end surface of the septum can be shaped with aconcave contour which causes the slit to completely close when the septum is in theproximal position. When a blunt connector is connected to the housing, the septum ispushed to a distal position, where other structure in the housing applies radial stress tothe septum to open the slit. The axial locations of the housing structures which apply theradial loads to open and close the slit are selected to insure that the septum is sealedbefore the septum fully reaches the proximal position, thereby maintaining a sealbetween the blunt connector and the septum until after the slit is sealed. The structurewhich opens the slit is positioned to open the slit only after sufficient force is applied tothe septum by the blunt connector, to insure that a seal exists between the blunt

connector and the septum before opening of the slit.

申请人：ELCAM PLASTICS

代理人：Gerald W. Spinks

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