Patent ID: 6802827
Filing Date: 2004-10-12
Classification: A61M

Abstract:
A hypodermic implant device, comprising: (a) a barrel comprising an open end and a guide-way end, the centers of the open end and the guide-way end in alignment with a central axis of the barrel; (b) a piston, comprising an upper piston segment and a lower piston segment, matingly engaged with an inner wall of the barrel for sliding movement in alignment with the central axis; (c) a central axis aligned needle with its inlet end facing the distal end of the piston and its nozzel end supported in the guide-way; (d) a needle receptacle comprised of a space formed by the barrel inner wall, the distal inner end of the barrel, and the distal face of the piston, so that when the upper piston segment is moved distally within the barrel, the nozzel extends distally through the guide-way out of the needle guide-way in position for insertion of the needle into an object; (e) a central axis aligned lower piston segment push rod in alignment with the needle bore, so that when the lower piston segment is moved distally within the barrel, the push rod moves distally through the needle bore expelling a releasable implant housed in the needle bore; and (f) a means for engagement of the needle inlet end to the distal face of at least one of the piston segments, so that the nozzel is fully retracted into the needle receptacle upon retraction of at least one of the piston segments.