Sanofi
Drug Delivery Device

Abstract:

A drug delivery device, comprising: a housing, a plunger arranged within the housing and movable along the longitudinal axis and adapted to push a piston within a container in a distal direction, the plunger being prevented from rotating and comprising an external thread, a drive nut arranged within the housing and comprising an internal thread engaging the thread of the plunger, an axial bearing arranged between the drive nut and the housing to limit axial movement of the drive nut relative to the housing, a mechanism configured to exert a force on the drive nut in the distal direction through a rotatable component coupled to the drive nut for joint rotation and at least one non-rotatable component, wherein a bearing is arranged between the at least one rotatable component and the at least one non-rotatable component, the bearing having a smaller diameter than the axial bearing.