DISPOSABLE SYRINGE Russian patent published in 2012 - IPC A61M5/50 A61M5/315 

FIELD: medicine.

SUBSTANCE: invention concerns medical equipment, in particular, disposable injection devices. The disposable syringe comprises a body, a rod piston and a needle. A body opening has a circular groove. The piston also comprises a circular groove wherein an open ring spring element. The width of the spring element correlates with that of the circular grooves in the body opening and on the piston. The external diameter of the released spring element correlates with the diameter of the circular groove in the body. The internal diameter of the released spring element is less than that of the body opening. The syringe is supplied with a support attached to the body and interacts with a working end face of the piston.

EFFECT: present invention allows simplifying a syringe construct and providing its disposable use.

2 cl, 5 dwg