Patent ID: 8075522

Claim:
A safety pen-needle assembly comprising: a. a needle hub; b. a needle having a cannula having a first portion with a sharpened distal end, the first portion protruding distally from the hub and a second portion protruding proximally from the hub and having an end for piercing a sealable membrane; c. a sliding cover that slides over the cannula to conceal the sharp end of the first portion of the cannula, the cover being capable of sliding in a proximal direction away from the sharp end thereby exposing the sharp end so that it may be used to penetrate a portion of skin on a patient d. a biasing means for keeping the cover over the sharp end of the first portion unless a force is exerted to slide the cover proximally away from the sharp end of the first portion; e. a locking means for irreversibly locking the cover over the sharpened end of the first portion after an injection has been administered with the needle; f. a visual indicating means for visually indicating that the needle has been previously used to administer an injection.