MEDICAL DEVICE WITH GEAR TRAIN

摘要

A stent delivery system having the ability to recapture or reconstrain a partially deployed self-expanding stent may have a variable gap between a stent and a respective proximal or distal stop, which respective stop limits the axial travel of a stent lock interfacing with the stent, and supports it during. Including in the housing of a handle assembly a gear train that converts a known angle of rotation of an input knob about a first axis into a variable distance of translation of an output along a second axis perpendicular to the first enables the user to close the gap reliably. The mechanism described herein requires a known, repeatable step to close a gap that can vary in length that makes the variation in the gap "invisible" to the user.