Patent ID: 7828778

Claim:
A handling device for use with a medical injector having a cylindrical body provided with a boss at the forward end thereof supporting a forwardly-projecting needle furnished with a substantially rigid protective sheath, which device comprises: a carrier having an outer cylindrical wall and co-axial therewith an inner tube which is a close sliding fit over the protective sheath of the needle; a cylindrical sleeve slidably mounted within the outer cylindrical wall of the carrier, a rear end of the sleeve being adapted to receive the cylindrical body of the injector; a bushing slidably located within the cylindrical sleeve, which bushing is retained within the sleeve and defines a bore for receiving the boss at the forward end of the injector body; spring means urging the bushing towards the rear end of the sleeve; and a plug mounted on the carrier for sliding movement between an inactive position where the plug is located substantially wholly within the carrier and an indicating position where the plug projects from the carrier, the plug having a wall disposed for engagement by a forward end of the protective sheath of the needle to effect said sliding movement; whereby in use the device is fitted to the forward end of the injector by receiving the injector cylindrical body in the sleeve and said boss of the injector in the bore of the bushing, the protective sheath then coupling to the inner tube of the carrier and the forward end of the sheath engaging said wall of the plug so pushing the plug forwardly with respect to the carrier to project therefrom, and on subsequent withdrawal of the carrier from the injector, the bushing and sleeve remain on the injector and the sheath remains within the carrier with the plug projecting from the forward end thereof in its indicating position.