NEW SAFE SELF-BLOCK, SELF-DESTRUCTING SYRINGE Russian patent published in 2013 - IPC A61M5/50 A61M5/315 A61M5/178 

FIELD: medicine.

SUBSTANCE: invention refers to medical equipment, namely a medical device, and more specifically to a self-destructing disposable syringe. The self-block and self-destructing safe syringe comprises a hollow cylinder, a piston sliding inside the cylinder, a rubber seal in front of the piston and a needle holder in front of the cylinder. The piston is provided with a round platform having at least one elastic clip projecting at an angle towards an inner wall of the cylinder. A section of a greater diameter is provided on the end of the cylinder. In an intermediate position of the cylinder between a section of a normal diameter and the section of the greater diameter there is a wedge-shaped step under which there is a groove wherein the elastic clip may be gripped when the piston is drawn backwards. The section of the greater diameter integrates a spring-assisted stop ring which can lean against a lower plane of the round platform.

EFFECT: object of the present invention consists in providing the self-destructing syringe wherein the piston may be blocked after an injection so that it is not reusable or replaceable.