An assembly mountable to an injector, such as an injection pen, to hide the needle of the injector from view. The assembly includes a retractable cover that is slidably mounted on a base sleeve that is releaseably connected to the injector. A spring between the cover and the base sleeve biases the cover...http://www.google.com/patents/US20040236284?utm_source=gb-gplus-sharePatent US20040236284 - Needle hiding assembly for a medication injector
