Device for catheter sheath retraction

A stent delivery device having a locked position and a use position, comprising:

• a sheath covering a compressed stent;
• a housing including a mover reel, the mover reel designed to rotate in the housing, the mover reel coupled to a mover reel actuator, wherein actuation of the mover reel actuator rotates the mover reel in a winding direction;
• a sheath pull wire having a proximal end coupled to the mover reel and a distal end coupled to the sheath, wherein rotation of the mover reel in the winding direction winds the sheath pull wire on the mover reel and moves the sheath in a proximal direction;
• and
• a pre-mover separate from the mover reel actuator, the pre-mover comprising:
• an arm having a proximal end engaged with the mover reel to prevent rotation in the locked position;
• and
• a pre-mover actuator coupled to the arm and having a portion projecting outside of the housing, wherein movement of the pre-mover actuator disengages the arm from the mover reel and transitions the stent delivery device from the locked position to the use position, wherein disengagement of the arm from the mover reel rotates the mover reel a predetermined amount in the winding direction.