Coupling element and process for manufacturing such a coupling element

A coupling element for connecting a fluid pipe to a hose, the coupling element comprising:

• a cannula defining a passage for fluids and extending along a longitudinal axis of the coupling element, between a front part configured for fitting on the hose and a rear part to be coupled to the fluid pipe;
• a body extending longitudinally about the cannula and secured thereto, defining a mouth for access to the front part of the cannula;
• a first jaw movable in rotation about a first axis of rotation perpendicular to and offset from the longitudinal axis between a clamping position wherein the first jaw presses the hose against the front part of the cannula in a zone comprised that extends in a radial direction relative to the longitudinal axis between the longitudinal axis and the first axis of rotation, and is bounded along the longitudinal axis by a boundary plane that is perpendicular to the longitudinal axis and spaced from the first axis of rotation by a first, non-zero distance that is measured parallel to the longitudinal axis, and a retracted position wherein the first jaw does not press the hose against a forward portion of the cannula;
• a maneuvering member, accessible from outside the body, for moving the first jaw between the clamping position thereof and the retracted position thereof,
• wherein the coupling element comprises:
• a pusher, housed in an internal volume of the body around the cannula and movable, in translation along the longitudinal axis, relative to the body;
• a member for elastic return of the pusher toward a forward position thereof;
• the pusher is provided with a first bearing surface, bearing against the first jaw;
• the first bearing surface of the pusher is configured to exert on the first jaw a force for moving the first jaw from the retracted position thereof to the clamping position thereof;
• the first bearing surface is arranged opposite the first axis of rotation in relation to the longitudinal axis;
• and
• when the first jaw is in the clamping position thereof, with the first bearing surface against the first jaw, a first radial gap, measured perpendicular to the longitudinal axis, between the first axis of rotation and a contact point of a force-receiving surface of the first jaw and the first bearing surface has a value greater than the value of the first distance.