Patent ID: 7311656

Claim:
In a transfer device usable in a system for intraluminal treatment of a selected site in a body of a patient by at least one treating element advanced through a lumen in the transfer device into a lumen of a separate catheter by means of pressurized fluid, the transfer device and catheter defining a fluid path for pressurized fluid and a treating element residing in a cartridge removably received by the transfer device, the transfer device further comprising: a gate moveable between first and second positions to selectively permit or prevent the treating element from moving from the treating element cartridge to the catheter; a first release button to permit disassembly of the catheter from the transfer device upon manipulation of the first button; a second release button to permit the treating element cartridge to be separated from the transfer device upon manipulation of the second button; an actuator assembly to control the gate and to permit manipulation of the first and second release buttons only when the actuator assembly controls the gate to prevent the treating element from moving from the treating element cartridge to the catheter.