Non-reusable syringe

Details Non-reusable syringe Non-reusable syringe

A - Human Necessities

61

M

A61M 5/178 (2006.01) A61M 5/315 (2006.01) A61M 5/50 (2006.01)

Patent

CA 2021249

EXTRACT A non-reusable syringe characterized by the provision on the inner surface of the syringe cylinder of a successive series of reliefs on the internal diameter, comprising a first relief immed- iately at the mouth of the plunger entry, this having a conicity at entry and a flat retaining step, a second relief in the proximity of the extremity of the cylinder which also consists of a conical entry followed by a flat retention step, acting to retain the piston head once utilized and finally a third zone in conical form and separated from the second above mentioned zone by a safety zone which is capable of lodging the piston head after the syringe has been used the retention being by a braking operation and an anti- retro stop in the third and second zones respectively.

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