Elastomer-ePTFE biopsy channel
First Claim
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1. A flexible channel which is liquid impervious comprisinga tubular inner liner of a flexible expanded polytetrafluoroethylene, having a predetermined inside diameter and outside diameter;
- anda tubular outer sleeve of an elastomer, having a free inside diameter smaller than the outside diameter of the inner tube, and stretch fit over said inner liner.
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Abstract
A biopsy channel for a borescope or endoscope is formed of a thin-wall elastomeric tubular sleeve or sheath that is interference fitted over an expanded polytetrafluoroethylene (Teflon) liner. An end fitting can be formed of a metal or plastic tube, preferably with an internal chamfer. This can be secured by epoxy in either end of the channel, after suitably priming the elastomeric sleeve or sheath. This channel has high dimensional stability and can withstand bending to tight radii without kinking.
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Citations
7 Claims
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1. A flexible channel which is liquid impervious comprising
a tubular inner liner of a flexible expanded polytetrafluoroethylene, having a predetermined inside diameter and outside diameter; - and
a tubular outer sleeve of an elastomer, having a free inside diameter smaller than the outside diameter of the inner tube, and stretch fit over said inner liner. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification