Patent ID: 7255684

Claim:
A syringe comprising: walls forming a cylindrical chamber; a transfer device connected to at least one of said walls; a piston operating in said cylindrical chamber to transfer material between said transfer device and said cylindrical chamber; an actuator magnetically coupled to said piston through at least one of said walls; said actuator being located in a position on said syringe independent of a position of said piston; said cylindrical chamber being a removable cartridge having at least one opening; a stopper positioned in sealing engagement to said chamber to block the at least one opening and penetrable by said transfer device; a removable portion of said chamber that creates a second opening positioned relative to said piston and said stopper when removed, said second opening permitting air transfer through said chamber when said piston moves between said stopper and said second opening, and wherein said cartridge is connected to said transfer device and said piston transfers material between said transfer device and said cylindrical chamber.