DISPOSABLE SYRINGE AND ROD FOR IT Russian patent published in 2017 - IPC A61M5/315 

FIELD: medicine.

SUBSTANCE: syringe comprises a cylinder, a rod and a rubber piston. At that, the cylinder comprises a proximal end, a distal end and a hollow interior. The hollow interior is defined by the cylindrical inner wall. The rod is located in the cylinder interior and is movable within the cylinder. The rod comprises a proximal end located outside the cylinder proximal end, a distal end disposed in the cylinder interior, and an axis extending through the proximal end and distal end of the rod, rod distal end is provided with a stop flange. The rubber piston is mounted on the rod and located on the distal side of the stop flange and is configured to contact with the cylinder inner wall in a liquid-tight manner. At that, the stop flange includes the main body, formed around the rod axis, and a push and press portion configured to push and press the rubber piston and extending from the main body in a direction from the rod axis. At that, the push and press portion is designed so that when the rubber piston stops at the cylinder distal end, only the push and press portion is deformed, while continuing to push and press the rubber piston.

EFFECT: use of the invention reduces the pain.

10 cl, 6 dwg