BigPatents India

The invention relates to a coupling comprising a receiving part (1), for receiving an insert (3) formed with a retaining ring (2), and a locking element (10) having two arms (11, 12) and a retaining portion (14), said locking element (10) fitting into a receiving space (7) of the receiving part (1) and movable between a raised and a pushed-in position. A lifting bevel (16) is formed on the locking element (10) and cooperates with the retaining ring (2) of an insert (3) in such a way that the locking element (10) can be moved from the pushed-in position to the raised position. The coupling also comprises a prelock assembly (15) and a pullback assembly (18, 19, 22, 23), which cooperate in such a way that when the retaining ring (2) is moved in the insertion direction into position behind the lifting bevel (16), the prelock assembly (15) engages behind the retaining ring (2) and the pullback assembly (18, 19, 22, 23) shifts the locking element (10) into a prelocked position. High reliability of assembly is achieved in this manner.