Syringe

Claim 1

A SYRINGE COMPRISING IN COMBINATION: AN ELONGATED CASING HAVING AN OPEN REAR END, AND ADAPTED TO CONTAIN WITHIN THE INTERIOR THEREOF ONE COMPONENT OF A CHARGE TO BE INJECTED BY THE SYRINGE, SAID CASING INTERIOR HAVING AT LEAST A PORTION THEREOF A CONSTANT INTERNAL DIAMETER; A BLISTER FORMED IN SAID CASING BY A PORTION OF SAID CASING HAVING A RADIUS GREATER THAN THE NOMRAL RADIUS OF SAID CONSTANT DIAMETER INTERIOR, SAID BLISTER HAVING A CERTAIN LENGTH PARALLEL TO THE LONGITUDINAL AXIS OF SAID CASING; AND AN ELONGATED PLUNGER INSERTABLE INTO SAID CASING REAR END, SAID PLUNGER CLOSED AT A FRONT END, RELEASABLY SEALED AT A REAR END, AND HAVING A CAVITY FORMED THEREIN ADAPTED TO CONTAIN A SECOND COMPONENT OF THE CHARGE TO BE EJECTED BY THE SYRINGE; SAID PLUNGER EXTERIOR HAVING AN ANNULAR SEAL PORTION ADJACENT SAID FRONT END, WITH THE REMAINDER OF THE EXTERIOR OF SAID PLUNGER HAVING AT LEAST ONE RELIEF GROOVE FORMED THEREIN EXTENDED FROM THE SEAL PORTION TO THE REAR END THEREOF, THE OUTER DIAMETER OF SAID SEAL PORTION BEING SUBSTANTIALLY EQUAL TO SAID CASING CONSTANT INTERNAL DIAMETER, WHEREBY WITHIN SAID CASING THE PLUNGER SEAL PORTION IS TIGHTLY ENGAGED WITH THE CASING INTERIOR WHILE SAID RELIEF GROOVE FORMS A FLUID PASSAGE THEREWITH, SAID SEAL PORTION HAVING A LONGITUDINALLY EXTENDED LENGTH LESS THAN THE LENGTH OF SAID BLISTER; SAID PLUNGER HAVING FURTHER AN OPENING IN COMMUNICATION WITH SAID CAVITY, SAID OPENING FORMED IN SAID SEAL PORTION AND HAVING A LENGTH LESS THAN SAID LENGTH OF SAID SEAL PORTION, SAID CASING INTERIOR AND SAID PLUNGER CAVITY FLUIDLY COMMUNICABLE UPON TRANSVERSE ALIGNMENT OF SAID OPENING WITH SAID BLISTER, WHEREBY SAID SECOND COMPONENT IS MOVABLE BY GRAVITY INTO SAID CASING INTERIOR FOR MIXING WITH SAID ONE COMPONENT.