Patent ID: 8795346

Claim:
A balloon catheter comprising: a balloon, an inner tube, an outer tube, and a stent having a proximal annular end, the balloon having an unexpanded configuration and an expanded configuration; the balloon having a proximal end region, a distal end region, and a working region extending therebetween, the working region having a diameter, in the expanded configuration the diameter being greater than in the unexpanded configuration, the stent crimped about at least a portion of the working region when the balloon is in the unexpanded configuration; the outer tube having a first region, a second region and a third region, the first region being proximal to the second region, the third region being distal to the second region, and the first region having an outer diameter greater than that of at least the second and third regions when the balloon is in the expanded configuration; the proximal end region of the balloon engaged to the second region of the outer tube, at least a portion of the working region being disposed about and coextensive with at least a portion of the third region of the outer tube when the balloon is in the expanded configuration, and the outer tube first region being proximal to the proximal end region of the balloon, wherein the balloon comprises a folded portion that is proximal to the proximal annular end of the stent and distal to the distal end of the third region, the folded portion forming a bulge, the bulge abutting the proximal annular end of the stent when the balloon is in the unexpanded configuration; the outer tube disposed about the inner tube, the inner tube extending along at least a portion of the first region, second region, and third region of the outer tube; the outer tube comprises an outer neck, the outer neck comprising the second and third regions, the outer neck being substantially frustoconical in shape and the third region having a diameter greater than that of the second region.