Patent ID: 7793993

Claim:
A coupling device for a fluid line comprising: a collet bearing against a main body axially and into which a fluid line is coaxially inserted, the collet having a plurality of axially extending support arms distributed in a peripheral direction, and an annular base portion from which all the support arms extend in the same direction and each support arm bearing a plurality of radially inwardly extending gripping teeth, wherein at least one first gripping tooth on each support arm is actuated by a first actuating portion of the support arm and at least one second gripping tooth on each support arm is actuated by a second actuating portion of the support arm, said first and second actuating portions being actuated by first and second groups of actuating faces, respectively, which are disposed on an actuating sleeve arranged around the collet, the actuating faces engaging the actuating portions upon axial displacement of the actuating sleeve in a shifting direction in order to thrust the gripping teeth radially inward to clamp the gripping teeth against the outer periphery of the inserted fluid line, wherein the first and second actuating portions are axially spaced from each other, and the first and second groups of actuating faces are circumferentially and axially spaced from each other such that upon axial displacement of the actuating sleeve at least one second actuating portion is engaged by one of the actuating faces in the second group of actuating faces after at least one first actuating portion has been engaged by one of the actuating faces in the first group of actuating faces, such that both first and second gripping teeth are clamped against the inserted fluid line; and wherein the plurality of gripping teeth include a first group of gripping teeth extending from an end of the support arm opposite the base portion and a second group of gripping teeth extending from an end of a mounting portion which is secured to a side of the support arm by a connecting rib which laterally extends from the support arm between the first group of gripping teeth and the base portion, the mounting portion being transverse to the connecting rib.