Patent ID: 8968254
Filing Date: 2015-03-03
Classification: A61J,A61M

Abstract:
1. A drug delivery device for dispensing of a user settable dose of a medicinal product, comprising: a housing, a drive mechanism comprising an axially displaceable piston rod to act on a piston of a cartridge containing the medicinal product to be dispensed, and a rotating dose dial that is rotated to set a size of the user settable dose, wherein the drug delivery device is further provided with a protective cover attached across a dose indicating unit of the drug delivery device, the dose indicating unit indicating the size of a user settable dose with rotating digits, wherein the protective cover is a surface element, wherein the protective cover is adapted to irreversibly increase a degree of opacity and to decrease a degree of transparency in response to an ambient temperature rising above or dropping below at least one predefined threshold, wherein the protective cover is substantially transparent prior to the ambient temperature crossing the at least one threshold, so that the user settable dose is viewable and wherein the protective cover becomes and remains substantially non-transparent in response to a crossing of the ambient temperature above or below the at least one predefined threshold, so that the user settable dose is no longer viewable.