#$%^&*AU2013206130A120130620.pdf#####MEDICATION INJECTOR APPARATUS WITH DRIVE ASSEMBLY THAT FACILITATES RESET Abstract A medication injector apparatus (620) comprising: a housing (670) a fluid container (632) mounted to said housing (670), said fluid container (632) defining a medicine-filled reservoir (634) and including a movable piston (638) at a proximal end of said reservoir (634) a needle assembly (628) removably attached to a distal end of said fluid container (632) to have an injection needle (656) of said needle assembly (628) in flow communication with said reservoir (634) a drive member (640) advanceable within said housing (670) in a distal direction to move said piston (638) toward said injection needle (656) for forcing medicine from said container (632) a dose setting element (685) including a control portion (680) external to said housing (670) and manually rotatable in a first direction to screw said dose setting element (685) from a plunged position to a plungeable position at which said dose setting element (685) projects farther proximally from said housing (670) than at said plunged position means, operable by translating without rotation said dose setting element (685) from said plungeable position to said plunged position, for advancing said drive member (640) in said distal direction, said advancing means comprising a drive sleeve (710) and a barrel (700) within said housing (670) that experience relative rotation during at least a portion of a movement of said dose setting element (685) between said plunged position and said plungeable position and an electronics assembly (838) that displays a dose of medicine to be injected based on a sensing of the relative rotational positions of said barrel (700) and said drive sleeve (710).
