Means for use in the administering of drugs, medicines and the like to animals

Claim 1

A PROJECTILE ADAPTED TO INJECT LIQUID MEDICINES, DRUGS AND THE LIKE INTO ANIMALS, COMPRISING A HOLLOW CYLINDRICAL BODY, A PISTON OF RESILIENT MATERIAL WITHIN SAID BODY CAPABLE OF AXIAL MOVEMENT THEREIN AND DIVIDING THE BODY INTO ANTERIOR AND POSTERIOR PORTIONS, MEANS FOR CLOSING THE END OF SAID ANTERIOR PORTION, SAID CLOSING MEANS INCLUDING A NIPPLE EXTENDING FORWARDLY OF THE END OF SAID ANTERIOR PORTION AND PROVIDED WITH A BORE EXTENDING AXIALLY THERETHROUGH, A HOLLOW NEEDLE POSITIONED IN SAID BORE FOR AXIAL SLIDING MOVEMENT THEREIN, SAID NIPPLE HAVING A BUTT END, A VALVE HOUSING SECURED WITHIN SAID ANTERIOR PORTION AND HAVING A FACE LOCATED IN SPACED PARALLEL RELATIONSHIP TO SAID BUTT END A VALVE MEMBER LOCATED IN THE SPACE BETWEEN SAID BUTT END AND SAID FACE FOR CLOSING SAID BORE AND PREVENTING COMMUNICATION BETWEEN SAID ANTERIOR PORTION AND THE INTERIOR OF SAID HOLLOW NEEDLE, SAID BUTT END AND VALVE HOUSING BEING PROVIDED WITH CONCAVE DEPRESSIONS ABOUT THE CENTRAL AXES THEREOF FOR ALLOWING THE VALVE MEMBER TO BE DISTORTED IN DIRECTIONS AXIAL OF SAID BODY, SAID ANTERIOR PORTION BEING ADAPTED TO BE FILLED WITH LIQUID MEDICINES, DRUGS AND THE LIKE, A GAS COMPRESSED IN SAID POSTERIOR PORTION CONSTITUTING AN ACTUATING MEANS FOR MOVING SAID PISTON IN THE DIRECTION OF SAID NIPPLE AND FOR MAINTAINING SAID ANTERIOR PORTION UNDER PRESSURE WHEN SAID VALVE MEMBER CLOSES SAID BORE IN SAID NIPPLE, SAID PISTON HAVING ANNULAR GROOVES AROUND THE PERIPHERY THEREOF FOR FORMING UNSTANDING PERIPHERAL PROJECTIONS, SAID PISTON BEING HOLLOW AND OPEN TO SAID POSTERIOR PORTION WHEREBY THE PRESSURE OF SAID GAS PRESSES SAID PERIPHERAL PROJECTIONS AGAINST THE INNER SURFACE OF SAID BODY THEREBY PROVIDING A SEAL BETWEEN SAID ANTERIOR AND POSTERIOR PORTIONS, AND MEANS ON THE BUTT END OF SAID HOLLOW NEEDLE EFFECTIVE UPON PENETRATION OF SAID HOLLOW NEEDLE INTO THE ANIMAL WHICH DEPLACES SAID NEEDLE AXIALLY OF SAID BORE FOR COACTING WITH SAID VALVE MEMBER FOR PROVIDING COMMUNICATION BETWEEN SAID ANTERIOR PORTION AND THE INTERIOF OF SAID NEEDLE SO THAT SAID GAS FORCES SAID PISTON TOWARD SAID NIPPLE THUS EXPELLING THE LIQUID CONTENTS OF SAID ANTERIOR PORTION THROUGH SAID HOLLOW NEEDLE.