DEVICE OF MEDICATION INJECTION DOSAGE Russian patent published in 2009 - IPC A61M5/24 A61M5/315 

FIELD: medical equipment.

SUBSTANCE: invention concerns medical equipment, particularly devices of medication injection dosage, and can be applied by patient in self-treatment, e.g. for diabetes. Device for medication injection dosage includes cartridge, case, medication cartridge holder mounted on case, medication dosage device in the form of rod with piston for medication expression from cartridge, including nut element and matching threaded part, and device of rod movement during injection. Additionally device includes external pressure device for obtainment of threaded engagement between nut element and matching threaded part, and device of nut element and matching threaded part blocking. Matching threaded part is made on rod which can perform lengthwise travel against case. Rod travel device is made in the form of hub connected to rotation drive. Nut element in the form of disc sector with one end suspended loosely on pin is mounted on hub end and can rotate around hub. External pressure device is made in the form of spring wire contacting nut element and hub.

EFFECT: enhanced precision of administration dosage of fluid medications from removable cartridge; simplified construction, due to implementation of combined function of dosage and piston rod release by one device (for fast cartridge replacement); simplified user operation due to reduced number of manipulations.

4 cl, 4 dwg