Roll back tube system

A - Human Necessities – 61 – B

Patent

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Details

A61B 1/00 (2006.01) A61B 1/01 (2006.01) A61B 1/31 (2006.01) A61M 25/01 (2006.01)

Patent

CA 2231761

A roll-back tube system, preferably for an endoscope, for moving an inner shaft which is guided in a roll-back tube of the type that is rolled back at both ends. The tube is driven via a number of friction wheels, suction cups or tracks which act on an inner tube section in order to drive the system in a continuous movement. In order to seal off the gap between the shaft and the inner tube section, front and rear turn-back areas in each case form a bead which bears sealingly on the shaft. The admission of lubricant into the gap between shaft and inner tube section takes place via an essentially radial shaft bore in the area of the roll-back tube, which shaft bore is either connected to an external admission line via the shaft cavity or an inner line, or else via a rear clamping piece by means of a lubricant injection shoe adapted to the shaft surface.

Système de tubes à circulation inverse, pour endoscope, visant à assurer le déplacement d'une tige interne guidée dans un tube à circulation inverse, aux deux extrémités. Le tube est commandé par l'entremise d'un certain nombre de roues de friction, de ventouses ou de pistes qui agissent sur une section interne du tube afin d'entraîner le système dans un mouvement continu. Pour sceller l'espace entre la tige et la section interne du tube, des zones d'inversion avant et arrière forment dans chaque cas un cordon qui assure un scellement autour de la tige. L'admission d'un lubrifiant dans l'espace entre la tige et la section interne du tube se fait par l'entremise d'un puits de tige essentiellement radial dans la zone du tube à circulation inverse, ce puits de tige étant soit relié à une ligne d'admission externe, via la cavité autour de la tige ou d'une ligne interne, soit via un dispositif de serrage au moyen d'u n sabot d'injection de lubrifiant adapté à la surface de la tige.

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