B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
B29C 47/54 (2006.01) B29D 23/00 (2006.01) B29C 47/00 (2006.01)
Patent
CA 2464732
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 (30) having a concentrically disposed guide rod (26) therein with a die (42) supported in concentric relation to the guide rod.
L'invention concerne un appareil et un procédé de fabrication d'éléments tubulaires polymères à parois minces qui sont particulièrement adaptés pour être utilisés comme implants vasculaires. Cet appareil permet d'extruder un élément tubulaire à paroi extrêmement mince qui passe facilement entre les passages vasculaires sinueux. De plus, cet appareil permet d'obtenir une épaisseur de paroi uniforme dans un élément tubulaire en établissant et en maintenant l'alignement axial d'un coulisseau (30) à tige de guidage concentrique (26) et d'une matrice (42) montée concentrique par rapport à la tige de guidage.
Brodeur Christopher B.
Girton Timothy S.
Hill Jason P.
Sogard David J.
Venditti James
Boston Scientific Limited
Piasetzki Nenniger Kvas Llp
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