Patent ID: 6843513

Claim:
A male luer lock connector for medical fluid lines comprising an elongated tubular body having a portion with a cylindrical external surface and an end portion with an external luer cone, and a bushing mounted on said cylindrical external surface of said tubular body so that it can turn and slide axially starting from a drawn-back position towards a fully advanced position, said bushing having an internal thread in which a female luer lock connector can be screwed, said end portion with said external luer cone of said tubular body being designed to engage axially with said female luer lock connector, further comprising cooperating formations provided between said portion with said cylindrical external surface of said tubular body and said bushing and designed to produce in use a click when said bushing, during axial travel of advance, draws near to said fully advanced position; wherein said cooperating formations include radial projections on one of said portions with said cylindrical external surface or said tubular body of said bushing, and an annular ribbing on the other of said bushing or portion with said cylindrical external surface of said tubular body, respectively and wherein said annular ribbing has a stepped axial front surface and a rounded axial back surface.