INJECTION DEVICE FOR UNLIMITED VARIED DOSING AND INTRODUCTION OF LIQUID PREPARATION Russian patent published in 2000 - IPC

FIELD: medicine. SUBSTANCE: device has injection cartridge with preparation for multiple introduction. Cartridge includes rear piston which can move forward due to piston rod. Longitudinal movement of piston rod is controlled by two couplings positioned along it. Each coupling is capable of piston rod catching and releasing with the aid of locking facility. Piston rod is of wedge-like cross-section. Each coupling contains clamping block with wedge-like slot cross-section of which is adjusted to that of piston rod. Each coupling also contains leverage by means of which piston rod and every clamping block may be clamped and released, thereby interlocking piston rod in clamping block slot. EFFECT: enhanced accuracy of dosing. 5 cl, 4 dwg