Patent ID: 7938456

Claim:
Quick action safety coupling for the removable connection of an upstream line and a downstream line through which a pressurized fluid flows, the coupling comprising a male element and a female element that mate axially and are locked together one inside the other, a locking mechanism that axially retains the male element in a coupled position, a transient retention mechanism capable of maintaining the male element, when it is released by the locking mechanism, in a position for purging the line connected to the male element, the locking mechanism being controlled by an operating sleeve sliding along a body of the female element, the transient retention mechanism being structured such that when the retention mechanism maintains the male element in the purge position, the transient retention mechanism is subjected to a first force (E 1 ) due to the pressure (P) of the fluid (F) flowing from the male element to the outside and to a second force (E 2 ), opposing the first force, exerted by elastic return means and tending to displace said mechanism towards a release configuration for releasing the male element from the female element, and the transient retention mechanism automatically passing from its retention configuration for retaining the male element within the female element to its release configuration for releasing the male element from the female element depending on a resultant of the forces (E 1 , E 2 ).