Patent ID: 8075607

Claim:
A delivery device, comprising: a handle comprising a trigger and a housing; a trigger rack affixed to the trigger, the trigger rack being movable back and forth within the handle and being pivotable about a pivot point, the trigger rack thereby being rotatable along a curved path around the pivot point; a stationary rack affixed to the housing, wherein the trigger rack and the stationary rack comprise a downward sloping curvature; a passageway between the trigger rack and the stationary rack having a downward sloping curvature; and a movable member disposed within the passageway, the movable member being ratchedly engaged to the trigger rack and the stationary rack along the entire downward sloping curvature of the passageway, a distal end of the movable member adapted to be assembled to a proximal end of an elongate sheath, wherein the ratcheted engagement of the movable member with the trigger rack and the stationary rack is configured to proximally retract the elongate sheath as the trigger is actuated.