A stent delivery system a catheter has an axially extending inner core and
outer sheath. Axially spaced rings extending from a relatively narrow
diameter portion of the inner core proximate the distal end thereof. The
rings engage proximal portions of a compacted stent disposed within the
sheath and over the core and rings. A proximal handle of the system has a
first portion that supports the sheath and a second portion that supports
the core for relative displacement of the core and the sheath. Retraction
of the sheath relative to the core uncovers the stent engaged by the
rings which tends to remain stationary relative to the core so that upon
partial retraction of the sheath a distal end of the stent expands to its
expanded form. Further retraction of the sheath deploys the stent,
retracting the core returns the distal portion of the stent into the
sheath.