IMPROVED NEEDLE-FREE INJECTORS Russian patent published in 2016 - IPC A61M5/30 

FIELD: medical equipment.

SUBSTANCE: group of inventions relates to medical equipment, specifically to needle-free injectors. According to first version needle-free injector comprises a gas cylinder with compressed gas; a slide valve; a device to release slide valve so as to provide compressed gas inlet into chamber; rod and a drug container. Slide valve comprises seal for storage, which supports gas cylinder in a state under pressure during storage. Rod is arranged to move with sliding in chamber so that it is moved forward under action of compressed gas released. Drug container maintains fluid communication of liquid drug with a hole for drug delivery. Rod is forcibly moved by released compressed gas, providing for supply of liquid drug through hole for drug delivery. According to second version needle-free injector contains a drug capsule containing a liquid therapeutic preparation; at least a hole in capsule leading to a liquid drug preparation; gas cylinder with two levels of pressure, having a central area containing first compressed gas at first pressure, and peripheral area, having a second compressed gas at second pressure. First compressed gas is in contact with drug dosing element and moves it forward. Movement of drug dosing element is prevented by actuating mechanism. Said dosing element does not move forward by said second compressed gas until it is released by said actuation mechanism. According to third version needle-free injector contains a drug capsule containing a liquid drug; at least one hole; power source and actuating mechanism including ball support. Said actuating mechanism actuates needle-free injector. Said power source directs a large portion of said liquid medicine through said at least one hole.

EFFECT: inventions allow to eliminate random operation; eliminating risk of injury due to jamming of needle and cross-contamination during injection of drugs; simple design due to exclusion of additional parts; as well as easy to use due to elimination of friction between adjacent elements.

50 cl, 15 dwg