Sanofi
Injection Device with a Filling Level Indicator

Abstract:

The present disclosure relates to an injection device for setting and injecting of a dose of a medicament. The injection device includes an elongated housing extending along a longitudinal direction and configured to accommodate a cartridge, a first member movably arranged inside the elongated housing for setting of the dose, and a second member, and a piston rod configured to advance in a longitudinal distal direction and operable to exert a distally directed pressure onto a bung of the cartridge for expelling of the dose. Depending on the setting, the first member is rotatable relative to the second member or is rotationally locked to the second member. The injection device includes a filling level indicator threadedly engaged with one of the first member and the second member, the filling level indicator being rotationally locked and longitudinally slidingly engaged with the other one of the first member and the second member.