PISTON ROD SYSTEM USEABLE IN INJECTION DEVICES

摘要

FIELD: medical engineering. SUBSTANCE: device has thread produced with one or more screw grooves on the surface of piston rod 1, the mentioned grooves transforming into longitudinal grooves 4. Nut member 6 is engageable with thread and at least one projection 8 directed inward. Projection or projections 8 guide traveling piston rod in groove or grooves forming the thread. EFFECT: enhanced reliability of operation. 7 cl, 6 dwg øøø1