Patent ID: 7708755

Claim:
A deployment system for delivering an embolic device to a target location of a body vessel, comprising: an elongated flexible deployment catheter having a lumen extending therethrough and having proximal and distal ends; an elongated pusher member having a lumen extending therethrough and having proximal and distal ends and being slidably disposed within the lumen of the deployment catheter, at least a portion of the distal end of the pusher member comprising a spiral ribbon section; a tubular member engaging and substantially encircling an outer surface of the spiral ribbon section; an embolic device releasably secured to the distal end of the pusher member, wherein the tubular member extends distally beyond the distal end of the pusher member to be directly adjacent to or in non-retentive, abutting relationship to a proximal end of the embolic device, and said embolic device includes a retaining ring at the proximal end thereof; a mechanical interlocking mechanism for releasably securing the embolic device to the distal end of the pusher member, and said mechanical interlocking mechanism comprises: an engagement member extending from the distal end of the pusher member and having an aperture extending through a distal end thereof, a portion of said engagement member extending through said retaining ring, and an elongated detachment member extending through the lumen of the pusher member and through the aperture of the engagement member such that when the detachment member is pulled proximally a distal end of the detachment member is withdrawn from the aperture of the engagement member; and a source of fluid pressure coupled to the proximal end of the pusher member and in fluid communication with the lumen of the pusher member for upon actuation applying fluid pressure to the lumen and to the embolic device to thereby move the embolic device away from the pusher member.