Secure fluids transfer system for medical use

A fluids transfer system for medical use, comprising a Luer male connector (10) and a Luer female connector (11),

• wherein said Luer female connector (11) comprises a main body (14) containing an internal channel (15) for the passage of said fluids, and a collar (12) surrounding at least a part of the end of the main body, and
• said Luer male connector (10) comprises a main body (18) with a longitudinal internal opening (19, 21), and wherein:
• the main body (14) of the female connector contains a first threading (16) on at least a part of the external surface of that portion that is surrounded by the collar (12), located at least in part facing an internal surface of the collar (12),
• one of the ends of the main body (18) of the Luer male connector (10) contains a second threading (20) on at least a part of its internal surface delineating the longitudinal internal opening (19, 21), which engages into and fits in the first threading (16) to ensure joining between the Luer male and female connectors,
• at least the external surface of the Luer male connector (10) end where the second threading (20) is located forms a conical male portion (24) having a conical axis of revolution, while the interior surface of the collar (12) of the female connector forms a conical female connecting surface (13) having a conical axis of revolution, so that the external surface of the male conical part (24) fits against the conical connecting surface of the collar (12) of the Luer female connector (11) to provide a sealed joint when the Luer male and female connectors are fitted together.