An add-on fail-safe safety cap for mounting on a retracting protective sleeve for a hypodermic needle. An annular collar is concentrically positioned around the sleeve adjacent its outer end. There is at least one tip shield carried by the collar with each tip shield having an arm portion hingedly attached...http://www.google.fr/patents/US5304151?utm_source=gb-gplus-shareBrevet US5304151 - Add-on fail-safe safety cap for passive sliding-sleeve needle protectors
Add-on fail-safe safety cap for passive sliding-sleeve needle protectors
