Patent ID: 8821532

Claim:
A device for closure of an opening formed through a wall of a body vessel of a patient, the device comprising: an anchor body having a first end and a second end, the first end including a plurality of hook members each including a tissue engagement structure configured to engage tissue of said body vessel, the second end configured as an eyelet, wherein the anchor body is formed of a single continuous wire and is movable between a contracted configuration and an extended configuration, where the anchor body is contractible to fit within said opening, and in the extended configuration the hook members of the anchor body are configured to be displaced outward to a cross-sectional area greater than the cross-sectional area of said opening and the tissue engagement structures of the hook members extend away from a central axis of the anchor body; an implantable tubular member having a first end and a second end and a lumen extending therethrough, the second end configured to remain in abutting contact with the body vessel, the lumen sized to receive the anchor body in the contracted configuration, wherein the tubular member is slidably engageable with a portion of the anchor body to urge the anchor body to move from the extended configuration to the contracted configuration; a retraction member disposed longitudinally within the lumen of the tubular member and attached to the eyelet of the anchor body, wherein the retraction member is retractable within the lumen of the tubular member to bring the second end of the tubular member closer to the first end of the anchor body; a sheath having a proximal end and a distal end, a distal portion of the sheath insertable through said opening, the sheath having a lumen extending therethrough; and a pusher disposed within the lumen of the sheath and movable within the sheath lumen; the pusher having a proximal end and a distal end and a lumen extending therethrough; wherein the anchor body is contractible to be disposed within the lumen of the sheath, the tubular member is interposed between the distal end of the pusher and the anchor body, and the retraction member has a first portion attached to the anchor body and a second portion extending past the first end of the tubular member.