Hypodermic syringe and dose dispenser

Claim 1

A CARTRIDGE-SYRINGE UNIT DEVICE ADAPTED FOR SELECTIVE GROSS-EJECTION AND INCREMENTAL DOSE-DISPENSING, SAID DEVICE COMPRISING: (1) A CARTRIDGE HAVING AN OPENING AT ITS DISTAL END; (2) AN EJECTION MEMBER; (3) MEANS SEALING THE PROXIMAL END OF SAID CARTRIDGE AND MOUNTING SAID EJECTION MEMBER THEREON IN COMMUNICATION WITH THE INTERIOR OF SAID CARTRIDGE; (4) A PLUNGER MOUNTED WITHIN SAID CARTRIDGE FOR RECIPROCATION THEREIN, SAID PLUNGER HAVING CONNECTING MEANS THEREON ACCESSIBLE VIA THE OPENING IN SAID DISTAL END OF SAID CARTRIDGE; (5) AN ELONGATE COVER FOR SAID EJECTION MEMBER, SAID ELONGATE COVER HAVING MEANS AT ONE END THEREOF FOR MOUNTING THE LATTER ON SAID DEVICE IN COVERING RELATIONSHIP WITH RESPECT TO SAID MEMBER, SAID COVER HAVING AT THE OTHER END THEREOF CONNECTING MEANS CONNECTABLE WITH SAID CONNECTING MEANS OF SAID PLUNGER FOR AFFIXING SAID COVER TO SAID PLUNGER WHEREBY THE FORMER IS ADAPTED TO SERVE AS A PUSH-ROD FOR SAID PLUNGER WHEN THE DEVICE IS TO BE USED; (6) A SEATING MEMBER MOVABLY MOUNTED ON THE EXTERIOR SURFACE OF SAID COMBINED COVER AND PUSH-ROD, MEANS ON SAID SURFACE TO PERMIT RELATIVE AXIAL INCREMENTAL MOVEMENT BETWEEN SAID SEATING MEMBER AND SAID COMBINED COVER AND PUSH-ROD, SAID SEATING MEMBER BEING PROVIDED WITH MEANS FOR SELECTIVELY MAINTAINING SAID MEMBER WITHIN THE OPENING IN SAID DISTAL END OF SAID CARTRIDGE IN SUBSTANTIALLY NON-ROTATABLE RELATIONSHIP WITH SAID CARTRIDGE WHEREBY SAID COMBINED COVER AND PUSH-ROD IS ADAPTED TO SERVE AS A DOSE-DISPENSING ACTUATOR UPON ROTATION OF SAID COMBINED COVER AND ROD WITH RESPECT TO SAID SEATING MEMBER, SAID SEATING MEMBER ALSO BEING SELECTIVELY REMOVABLE FROM THE OPENING IN SAID DISTAL END OF SAID CARTRIDGE WHEREBY SAID MEMBER MAY BE MOVED ON SAID SURFACE OF SAID COMBINED COVER AND PUSH-ROD TOWARD THE DISTAL END THEREOF WITHOUT CAUSING RECIPROCATION OF SAID PLUNGER IN SAID CARTRIDGE THEREBY TO ADAPT SAID COMBINED COVER AND PUSH-ROD TO SERVE AS A GROSS-EJECTION ACTUATOR UPON AXIAL MOVEMENT THEREOF INTO SAID CARTRIDGE.