Patent ID: 6969375

Claim:
Connection device for medical use, of the Luer lock type, comprising: a) An adapter ( 2 ) having an axial internal passage ( 2 a ), comprising a junction seat ( 3 ) and a proximal annular retention zone ( 4 ); b) A collar ( 5 ) providing an axial open housing ( 5 a ) whose wall ( 6 ) contains a distal part ( 6 a ) with internal threading ( 12 ) and a transverse proximal part ( 6 b ) in which provision is made for a proximal central retention opening ( 7 ), whose diameter is adjusted to that of the said proximal annular zone ( 4 ) of the adapter ( 2 ), wherein the said collar ( 5 ) is attached in translational or rotational manner to the adapter ( 2 ), by insertion between the proximal annular retention zone ( 4 ) of the said adapter and the proximal central retention opening ( 7 ); c) A connection device ( 8 ) comprising another additional junction seat ( 9 ), fitted to the junction seat ( 3 ) of the adapter ( 2 ), and at least one external proximal, transverse flange ( 10 ), forming a thread ( 11 ) fitted to the internal threading ( 12 ) of the collar ( 5 ), with an axial passage ( 13 ) in fluid communication with the interior of the said cap ( 8 ), characterized by the fact that one of the proximal annular retention zone ( 4 ) of the adapter ( 2 ) and the proximal central retention opening ( 7 ) of the collar ( 5 ) contain a circular band or cord ( 4 a ) coated or treated with a roughening agent, further characterized by the fact that the proximal annular retention zone ( 4 ) of the adapter ( 2 ) is a groove with a flat bottom ( 4 a ), and the central retention opening ( 7 ) of the collar ( 5 ) forms a circular edge ( 7 a ) fitted to lock into the said groove, and further characterized by the fact that the roughening agent coats the flat bottom ( 4 a ) of the groove and/or the edge ( 7 a ) of the central opening.