A sheath is provided for covering a device on the distal end of a catheter system during the delivery of the device to an intravascular site within a patient. The sheath can be added to any delivery system prior to use and is intended to protect a deliverable device, such as an intravascular stent, from...http://www.google.de/patents/US6592569?utm_source=gb-gplus-sharePatent US6592569 - Protective sheath for catheters
