Composite seal structure and a coupling arrangement for a cannula
First Claim
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1. A coupling arrangement comprisinga first part defining a tubular housing;
- a composite seal structure secured in one end of said housing, said seal structure including an elastomeric septum having an exposed end of said end of said housing and a slit therein and a sealing member adjacent said septum with a throughbore longitudinally aligned with said slit; and
a second part having a cannula with a blunt end, said cannula passing through said slit of said septum in slidable relation and passing through said throughbore of said sealing member in seal-tight releasable friction fit relation for coupling said second part with said first part.
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Abstract
The composite seal is formed of a slit elastomeric septum and a sealing member which serves to seal against a blunt ended cannula passing through the slit septum. The composite seal may be made of one piece construction or of two piece construction. The sealing member may be formed of a separate rubber disc to frictionally grip a cannula in place. Alternatively, the sealing member may be formed by a plastic housing in which the slit septum is mounted. In this latter case, the plastic housing has a reduced bore for gripping of the cannula. No exterior mechanical locking elements are required to secure a cannula to the composite seal structure.
214 Citations
7 Claims
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1. A coupling arrangement comprising
a first part defining a tubular housing; -
a composite seal structure secured in one end of said housing, said seal structure including an elastomeric septum having an exposed end of said end of said housing and a slit therein and a sealing member adjacent said septum with a throughbore longitudinally aligned with said slit; and a second part having a cannula with a blunt end, said cannula passing through said slit of said septum in slidable relation and passing through said throughbore of said sealing member in seal-tight releasable friction fit relation for coupling said second part with said first part. - View Dependent Claims (2, 3, 4)
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5. A coupling arrangement comprising
a first part defining a tubular housing having a central bore; -
an elastomeric septum secured in one end of said housing with an exposed end at said end of said housing and having a slit therein coaxial of said bore; a second part having a cannula with a blunt end passing through said slit of said septum in slidable relation and passing into said bore of said housing in seal-tight releasable friction fit relation for coupling said second part with said housing. - View Dependent Claims (6, 7)
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Specification