SAFE DISPOSABLE SYRINGE Russian patent published in 2010 - IPC A61M5/50 A61M5/32 A61M5/315 

FIELD: medicine.

SUBSTANCE: invention relates to medical equipment, namely to safe disposable syringes. Safe disposable syringe contains cylinder, plunger, piston, hollow needle and needle-holder. Cylinder has anterior and posterior open ends, limiting cavity and having axis (X). Plunger continues through posterior open end of cylinder into cavity and has anterior end. Piston is mounted on anterior end of plunger and is formed with first engaging element. Needle holder in proper manner is continued through anterior open end of cylinder and has anterior end located outside cylinder cavity, and posterior end, located in cavity, and having posterior butt surface facing piston. Needle holder limits central canal passing through anterior end of needle holder for placement of hollow needle, and limits flow canal, passing through posterior butt surface of needle holder posterior end and providing liquid connection of central canal with cylinder cavity. Posterior butt surface of needle holder posterior end is formed with second engaging element, which is aligned in longitudinal direction, and which is adapted for engagement with first engaging element. Flow canal has first end section, ending on posterior butt surface of needle holder posterior end, and has second end section, opposite to first end section and ending on posterior butt surface of needle holder posterior end. Second engaging element has end section, ending on posterior butt surface of needle holder posterior end and located at distance from first end surface of flow canal. Needle holder has external surface around axis (X) and flow canal, as a rule, U-shaped, which has radially continuing section, continuing radially with respect to external surface, and two sections, continuing in longitudinal direction, which continue respectively from two ends of radially continuing section to first and second end sections. Flow canal widens from inside radially with respect to external surface of needle holder on needle holder axial length.

EFFECT: obtaining possibility to use said syringe construction for syringes of small size, ie for syringes whose size constitutes less than 1 cm³.

12 cl, 11 dwg