Coupling for connecting hydraulic ducts

A coupling for connecting hydraulic ducts comprising:

• a longitudinal axis;
• a first coupling element forming a first locking face circumferentially arranged around the longitudinal axis;
• a second coupling element for coupling with the first coupling element, said second coupling element including an annular groove forming a second locking face;
• a plurality of locking elements in the form of annular segments arranged in the annular groove of the second coupling element, said plurality of locking elements having a first longitudinal end with a holding mechanism engaging the locking element on the first longitudinal end holding the plurality of locking elements in the annular groove, said plurality of locking elements being radially pivoted between a locking position and a releasing position, wherein the plurality of locking elements are acted upon by the holding mechanism to take up the locking position, said plurality of locking elements having an abutment face interacting with the first coupling element wherein by coupling the second coupling element with the first coupling element said plurality of locking element being moved from the locking position into the releasing position, said plurality of locking elements in the coupled condition of the coupling elements are axially supported on one side by the first locking face and on another side by the second locking face, wherein the first locking face and the second locking face face each other;
• and
• an unlocking sleeve axially displaceable relative to the second coupling element between a locking position and a releasing position, said unlocking sleeve interacting with displacement faces of said plurality of locking elements wherein moving the unlocking sleeve from the locking position into the releasing position the plurality of locking elements moving from the locking position into the releasing position, and said unlocking sleeve holding the locking elements on a second longitudinal end axially distanced from the first longitudinal end in the annular groove.