Apparatus and method for extrusion of thin-walled tubes
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United States of America Patent
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Nov 9, 2004
Grant Date -
May 1, 2003
app pub date -
Oct 30, 2001
filing date -
Oct 30, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention provides an apparatus and method for manufacturing polymeric thin-walled tubular members, which are well-suited for use as vascular grafts. The apparatus of the present invention enables extrusion of a tubular member having an extremely thin wall thickness so as to facilitate passage through tortuous vascular passageways. The apparatus achieves uniform wall thickness in a tubular member by establishing and maintaining axial alignment of a ram having a concentrically disposed guide rod therein with a die supported in concentric relation to the guide rod.
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