Needle-less syringe with two-speed injection comprises a one-piece delivery head and a drive head of greater diameter on two separate pistons

摘要

Needle-less syringe with two-speed injection comprises a one-piece delivery head and a drive head of greater diameter on two separate pistons, is new. The syringe (1) has a reservoir (2) for an active liquid which is expelled through channels (3) by the force created by a gas generator (7) via drive and delivery heads on two separate pistons located one above the other. The delivery head facing the liquid is in one piece, while the drive head (6) is of greater diameter, and its stroke (C1) inside the drive cylinder is shorter than the height (H1) of the reservoir.