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

FIELD: medicine.

SUBSTANCE: invention concerns medical equipment, in particular, disposable injection devices. A disposable syringe comprises a needle and a body with its opening containing a rod piston and an open-ended spring sleeve with a collar at the end. Said sleeve is mounted in a piston opening provided from a non-working side. Said collar of the sleeve is provided from its outside. The body opening has a circular groove. A width of the collar of the spring sleeve matches to a width of the circular groove in the body opening. A outer diameter of the free spring sleeve matches to a diameter of the body opening. The diameter of the collar of the spring sleeve exceeds the diameter of the body opening.

EFFECT: simplified syringe design and ensured single use.

3 cl, 5 dwg