Vial

Claim 1

A SINGLE COMPARTMENT MEDICAMENT VIAL COMPRISING A CYLINDRICAL CONTAINER OF SUBSTANTIALLY UNIFORM DIAMETER HAVING A CLOSED END AND AN OPEN END, SAID CONTAINER BEING ADAPTED TO CONTAIN AN INJECTABLE MEDICAMENT; A RESILIENT STOPPER IN SAID OPEN END HAVING RIDGES FORMING A SEALING ENGAGEMENT WITH THE INNER WALLS OF SAID CONTAINER AND A RELATIVELY THIN PORTION ADAPTED TO BE PIERCED BY A SYRINGE NEEDLE, THE RIDGES ON SAID STOPPER EXERTING A FRICTION FORCE AGAINST THE INNER WALLS OF SAID CONTAINER LESS THAN NORMAL ATMOSPHERIC FORCE ON THE TOP OF SAID STOPPER, SAID STOPPER BEING SLIDABLE DOWNWARDLY IN SAID CONTAINER UPON WITHDRAWAL OF A PORTION OF SAID MEDICAMENT UNDER THE INFLUENCE OF NORMAL VACUUM; AND SAID CYLINDRICAL CONTAINER HAVING MALE THREADS FORMED ON ITS OUTER WALL ADJACENT THE OPEN END THEREOF AND A CAP THEREOVER HAVING FEMALE THREADS ENGAGEABLE WITH SAID MALE THREADS AND ANOTHER PORTION ENGAGEABLE WITH SAID STOPPER TO EXERT DOWNWARD PRESSURE ON SAID STOPPER UPON TURNING OF SAID CAP TO THREAD SAID CAP DOWNWARDLY OVER SAID VIAL.