LIQUID DRUG DELIVERY DEVICE Russian patent published in 2014 - IPC A61M5/20 A61M5/315 A61M5/30 A61M5/48 

FIELD: medicine.

SUBSTANCE: invention refers to medical equipment, namely to a device for delivering a fixed dose or an adjustable dose of a liquid drug preparation to a patient. An injection device comprises a drive shaft, a coupling mechanism, a piston rod, a dose limiter, a planetary gear system and a start button. The coupling mechanism is performed to be coupled with the drive shaft. The piston rod is coupled with the coupling mechanism. The dose limiter is coupled with the coupling mechanism. The planetary gear system contacts and interacts with the dose limiter. The planetary gear system has a hole wherein the piston rod can be inserted. The planetary gear system selectively contacts and interacts with the dose limiter.

EFFECT: invention provides generating high hydrostatic pressure in the drug preparation and may be used to actuate an inhaler or a needle-free injector; the device according to the invention maintains the exterior compact dimensions.

20 cl, 7 dwg