Needleless prefilled disposable hypodermic injector

Claim 1

A HYPODERMIC INJECTOR COMPRISING THE COMBINATION OF A CASING HAVING THEREIN A MEDICAMENT CARTRIDGE INCLUDING A TUBE AND MEANS ASSOCIATED THEREWITH PROVIDED WITH A PENETRABLE STOPPER CLOSING ONE END OF SAID CASING AND THE CORRESPONDING END OF SAID TUBE, AND A TRIGGERCONTACTOR AXIALLY SLIDABLY MOUNTED ON SAID CASING AT SAID END THEREOF AND PROVIDED WITH A WALL DISPOSED OUTWARDLY OF SAID STOPPER TO MOVE TOWARD AND AWAY THEREFROM AND HAVING A CANNULA ONE END PORTION OF WHICH IS RIGIDLY SECURED ON SAID WALL PROVIDING AN ORIFICE TERMINATING IN THE OUTER SURFACE OF SAID WALL, THE OTHER END PORTION OF THE CANNULA PROJECTING INWARDLY OF SAID WALL TO PENETRATE SAID STOPPER AND PROVIDE FOR DISCHARGE OF SAID MEDICAMENT FROM SAID CARTRIDGE UPON RELATIVE MOVEMENT OF SAID CASING AND SAID TRIGGER-CONTACTOR INCIDENT TO PRESSING THE LATTER AGAINST A BODY TO RECEIVE AN INJECTION, AND MEANS TO EFFECT SUCH DISCHARGE OF THE MEDICAMENT AT HIGH VELOCITY.