Patent ID: 8012167

Claim:
An apparatus for subcutaneously delivering a material, comprising: an elongate delivery tube having a chamber enclosing a malleable fibrous hemostatic material therewithin; an elongate catheter extending longitudinally through the delivery tube, the chamber being defined between the catheter and the delivery tube; an elongate pusher member having a distal portion configured to slidably extend through at least a portion of the delivery tube chamber so as to push at least a portion of the material out of the delivery tube, the pusher member having a surface with at least one protuberance disposed proximal a distal end of the pusher member and distal a proximal end of the pusher member so that the surface extends both proximally and distally of the protuberance, the pusher member protuberance having a protuberance length along the elongate pusher member; a flexible locking member configured to fit at least partially around the pusher member and adapted to expand in a transverse direction when subjected to generally longitudinal compression, the flexible locking member having a longitudinal length that is greater than the protuberance length; wherein the flexible locking member is disposed adjacent the pusher member protuberance so that when the locking member is subjected to generally longitudinal compression, the locking member expands transversely to engage the pusher member protuberance and the pusher member surface adjacent the protuberance to increase friction between the pusher member and the locking member so that the pusher member is restrained from moving relative to the locking member.