Connector for medical lines

1. A connector for medical lines, comprising;

a tubular body having a male luer-lock fitting at one end, including an inner tubular element and an innerly threaded outer hollow element intended to be screw-coupled with a complementary female fitting;

an outer jacket coupled in an unidirectional rotation with the tubular body in a direction corresponding to a screwing of said male luer-lock fitting and freely rotatable in an opposite direction of unscrewing; and

at least one side push-button carried by said outer jacket and radially displaceable relative to said outer jacket to selectively couple said outer jacket with the tubular body in a direction corresponding to an unscrewing of said male luer-lock fitting;

said innerly threaded outer hollow element of the male luer-lock fitting provided radially externally with a crown of engagement teeth co-operating with a crown of springing ratchet teeth provided radially internally of said outer jacket for a mutual unidirectional rotational coupling in the direction corresponding to the screwing of said male luer-lock fitting;

said crown of springing ratchet teeth elastically springing such that each springing ratchet tooth of said crown of springing ratchet teeth elastically jumps over an engagement tooth of said crown of engagement teeth during the rotation in the direction of the unscrewing to avoid accidental unscrewing of the male luer-lock fitting during use; and

wherein a resilient body, adapted to be pierced by a needle or passed-through by a cannula, is inserted into the end of said tubular body opposite to said male luer-lock fitting.

2. A connector according to claim 1 , wherein said at least one side push-button is provided with an engagement tooth and said tubular body is provided externally with at least one striker tooth, said side push-button essentially being radially displaceable between a stable inoperative position and an unstable operative position wherein said engagement tooth interacts with said striker tooth.

3. A connector according to claim 2 , wherein said at least one side push-button consists of an elastically deformable element integrally formed with the outer jacket and bearing said engagement tooth at its free end.

4. A connector according to claim 1 , further comprising a pair of side push-buttons, diametrically opposite to each other.

5. A connector according to claim 1 , wherein said outer jacket is formed by two half-shells mutually joined on said tubular body.

6. A connector according to claim 5 , wherein said two half-shells are mutually joined by a snap-fit coupling.

7. A connector for medical lines, comprising;

a tubular body having a male luer-lock fitting at one end, including an inner tubular element and an innerly threaded outer hollow element intended to be screw-coupled with a complementary female fitting;

an outer jacket coupled in unidirectional rotation with the tubular body in a direction corresponding to a screwing of said male luer-lock fitting and freely rotatable in an opposite direction;

at least one side push-button carried by said outer jacket and radially displaceable relative to said outer jacket to selectively couple said outer jacket with the tubular body in a direction corresponding to an unscrewing of said male luer-lock fitting;

said male luer-lock fitting comprising a first striker tooth configured to engage said at least one side push-button to selectively couple said outer jacket with the tubular body, said first striker tooth located at a rear end of said male luer-lock fitting and on an external surface of said tubular body, said first striker tooth separated by a recess of said tubular body from an opposite end of a recess surface bounding said recess formed at an obtuse angle relative to said recess surface, and said first striker tooth formed at an acute angle relative to said recess surface;

said innerly threaded outer hollow element of the male luer-lock fitting provided radially externally with a crown of engagement teeth co-operating with a crown of springing ratchet teeth provided radially internally of said outer jacket for a mutual unidirectional rotational coupling in the direction corresponding to the screwing of said male luer-lock fitting; and

said crown of springing ratchet teeth elastically springing such that each springing ratchet tooth of said crown of springing ratchet teeth elastically jumps over an engagement tooth of said crown of engagement teeth during the rotation in the direction of the unscrewing to avoid accidental unscrewing of the male luer-lock fitting during use.

8. The connector of claim 7 further comprising a second striker tooth located at said rear end said male luer-lock fitting and on said external surface of said tubular body, said second striker tooth separated by a second recess of said tubular body from a second opposite end of a second recess surface bounding said second recess formed at a second obtuse angle relative to said second recess surface, and said second striker tooth formed at an acute angle relative to said second recess surface.

9. The connector of claim 8 wherein said first recess and said second recess are located on opposite sides of said tubular body.