Patent ID: 6165153
Filing Date: 2000-12-26
Classification: A61M

Abstract:
An apparatus comprising:a barrel having a first end, a second end, an internal surface and a longitudinal axis, said barrel first end having a cap portion at said barrel second end, said cap portion having an inner surface, an outer surface and a port connecting said inner surface to said outer surface;a piston having a cross section adapted to substantially conform to said barrel internal surface and central channel;a plunger in communication with a piston, said plunger adapted to move said piston along said barrel longitudinal axis between said barrel first end and said barrel second end; anda locking mechanism in communication with said plunger and adapted to pass through said piston central channel and extend beyond said piston, said locking mechanism further adapted to pass into said port and engage said port, whereby said piston is locked when said plunger is moved to said barrel second end.