Patent ID: 8590568

Claim:
A female quick-connect coupling element for releasably joining together pipes for pressurized fluid, the female element for receiving an end-piece of a male element when a male element is inserted therein along a longitudinal axis of the female element, the female element comprising: at least one locking member for locking an end-piece of the male element therein when the male element is inserted within the female element; a fluid flow duct; a valve for controlling a flow of the fluid through the flow duct, which valve includes a movable piston element mounted to move relative to a valve seat between open and closed positions to open and close the valve; a discharge circuit for discharging the flow of the fluid within the flow duct downstream from the valve seat in a flow direction of the fluid flow; and a hollow end-piece for bearing against a seal carried by the male element when a male element is fitted into the female element, a portion of the flow duct extending through the end-piece; and the hollow end-piece including an inner sleeve and an outer sleeve that are coaxial and mounted to move axially relative to each other; and wherein the inner sleeve and the outer sleeve are each adapted to come into abutment against a seal carried by the male element when inserted into the female element; and a space defined between the inner and outer sleeves is in fluid communication with the discharge circuit.