Composite drive shaft

Details Composite drive shaft Composite drive shaft

F - Mech Eng,Light,Heat,Weapons

16

C

F16C 1/02 (2006.01) A61B 17/22 (2006.01) A61F 2/00 (2006.01)

Patent

CA 2160698

Disclosed herein is a flexible composite drive shaft (20) used in the field of flexible vascular atherectomy catheters for connecting a rotating drive means and a rotatable working member. The flexible composite drive shaft (20) includes a core (22) of specially selected highly elastic memory alloy surrounded by a flexible torsional reinforcing member (28) and a coating (34) made of polymetric material which penetrates the interstices between the reinforcing member (28) and the outer surface of the core (22). Cooperation between the core (22), the reinforcing member (28) and the interpenetrating polymer coating (34) provides a composite drive shaft.

L'invention concerne une tige d'entraînement (20) composite flexible utilisée dans des cathéters flexibles d'athérectomie vasculaire pour raccorder un moyen d'entraînement rotatif et un organe de travail pouvant entrer en rotation. Cette tige (20) comprend une âme (22) constituée d'un alliage à mémoire de forme, de haute élasticité, spécialement sélectionné. Cette âme est entourée par un organe de renforcement (28) flexible pouvant tourner, et par un revêtement (34) d'un matériau polymère qui pénètre dans les interstices compris entre l'organe de renforcement et la surface extérieure de l'âme. La coopération entre l'âme (22), l'organe de renforcement (28) et le revêtement de polymère (34) permet d'obtenir une tige d'entraînement composite.

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