Pneumatic gun for surgical use

Claim 1

A PNEUMATIC GUN CAPABLE OF PROJECTING LIGHTWEIGHT FINE DIAMETER MISSILES AT HIGH VOLOCITY WHICH COMPRISES IN COMBINATION: A DETACHABLE MISSILE BARREL HAVING A CYLINDRICAL RECESS AND A MISSILE BORE OF FINE DIAMETER EXTENDING FROM AND COMMUNCIATING WITH SAID CYLINDRICAL RECESS AND IN AXIAL ALIGNMENT THEREWITH, SAID CYLINDRICAL RECESS BEING OF GRATER LENGTH AND DIAMETER THAN SAID MISSILE BORE, A FOLLOWER PLUNGER SLIDABLY FITTING IN SAID CYLINDRICAL RECESS FOR LENGTHWISE MOVEMENT THEREIN, SAID FOLLOWER PLUNGER HAVING A FORWARDLY EXTENDING FINGER OF A LENGTH GREATER THAN THE FULL LENGTH OF TRAVEL OF SAID FOLLOWER PLUNGER IN SAID CYLINDRICAL RECESS BUT NOT GREATER THAN THE LENGTH OF SAID MISSILE BORE AND SLIDABLY FITTING IN SAID MISSILE BORE, SAID FOLLOWER PLUNGER HAVING A RATIO OF LENGTH TO DIAMETER OF FROM ABOUT 1 1/2 TO 2 2/3: 1 TO PROVIDE SUFFICIENT BEARING SURFACE ON THE WALL OF SAID CYLINDRICAL RECESS TO HOLD THE FINGER ON SAID FOLLOWER PLUNGER IN TRUE ALIGNMENT WITH SAID MISSILE BORE, SAID FOLLOWER PLUNGER AND FINGER HAVING A COMBINED LENGTH GREATER THAN SAID CYLINDRICAL RECESS FOR EXTENDING SAID FINGER PART WAY INTO SAID MISSILE BORE TO FORM A FRONT LOADING MISSILE BARREL WHEN SAID FOLLOWER PLUNGER AND FINGER ARE ASSEMBLED IN SAID CYLINDRICAL RECESS IN THE FIRING CONDITION OF THE GUN, SAID FOLLOWER PLUNGER BEING ADAPTED ON FORWARD MOVEMENT THROUGH THE FULL TRAVEL DISTANCE THEREFOR IN SAID CYLINDRICAL RECESS TO PUSH SAID FINGER THROUGH THE FULL TRAVEL DISTANCE THEREFOR IN SAID MISSILE BORE, PNEUMATIC MEANS INCLUDING A TUBE HAVING AN ELONGATED TUBULAR PNEUMATIC PROPULSION CHAMBER AND A PRIMARY PLUNGER SLIDABLY FITTING IN SAID CHAMBER FOR PNEUMATIC PROPULSION THEREIN DETACHABLY CONNECTED TO SAID MISSILE BARREL AND IN OPERATIVE COMMUNICATION WITH SAID CYLINDRICAL RECESS FOR RAPIDLY PUSHING SAID FOLLOWER PLUNGER THROUGH THE FULL TRAVEL DISTANCE THEREFOR IN SAID CYLINDRICAL RECESS, SAID PNEUMATIC MEANS FURTHER INCLUDING MEANS FOR SEALING THE PORTION OF SAID PNEUMATIC PROPULSION CHAMBER WHICH IS FORWARD OF SAID PRIMARY PLUNGER AGAINST FLOW OF PROPULSION GAS THEREINTO IN OPERATION OF THE GUN, AND MEANS FOR VENTING FROM THE GUN AT THE FORWARD END OF SAID PNEUMATIC PROPULSION CHAMBER DURING OPERATION OF THE GUN THE AIR WHICH IS COMPRESSED AHEAD OF SAID PLUNGERS IN OPERATION OF THE GUN.