A DOSE DELIVERY DEVICE IS DISCLOSED WHEREIN A DOSE CAN BE SET BY ROTATING A DOSE SETTING MEMBER, WHEREBY A PUSH BUTTON (4) IS ELEVATED FROM ONE END OF THE DEVICE A DISTANCE PROPORTIONAL TO THE SET DOSE FROM A POSITION FIXED RELATIVE TO THE HOUSING, AND WHEREIN THE SET DOSE CAN THEN BE INJECTED BY PRESSING THE PUSH BUTTON BACK TO ITS NON- ELEVATED POSITION, THROUGH WHICH MOTION A PISTON ROD WILL MOVE APPROXIMATELY THE SAME DISTANCE. THE INVENTION PROVIDES A METHOD OF FORCING A NUMBERED SCALE DRUM TO ROTATE BOTH DURING DOSE SETTING AND INJECTION TO ALLOW THE USER TO READ THE REMAINING DOSE AT ANY TIME DURING SETTING AND INJECTING A DOSE.
