Patent ID: 7875067

Claim:
An apparatus for delivery and deployment of an expandable stent within a vessel, the apparatus comprising: a catheter having a proximal end and a distal end, an expandable means mounted at the distal end of the catheter and being expandable by means of a fluid pressure device and a liquid fluid, the expandable means being expandable from a delivery diameter to a deployment diameter, a sheath being slidably mounted over the expandable means and being arranged for proximal retraction from over the expandable means by means of a retraction device, the refraction device comprises a cylinder-piston arrangement operated by the fluid pressure of the liquid, the cylinder-piston arrangement comprises an outlet connected to a fluid pressure line for applying the fluid pressure to the expandable means, the fluid pressure device is further arranged for operating the retraction device so that the expandable means is expanded in response to the retraction of the sheath.