Patent ID: 7762525

Claim:
A female hydraulic coupling member comprising: a body having a central axial bore with a stepped internal diameter, a portion of the central axial bore forming a receiving chamber for the probe of a male hydraulic coupling member; a first shoulder in the central axial bore at a first step in the internal diameter; a first annular groove in the first shoulder; a longitudinal passage in the body in fluid communication with the annular groove; a substantially radial passage in the body in fluid communication with the central axial bore and the longitudinal passage; a substantially cylindrical annular flow piece insertable in the central axial bore having a first end, an opposing second end, a stepped outer diameter forming a first shoulder and a second shoulder, and a central axial bore having a stepped internal diameter with at least two steps forming a first section having a first internal diameter, a second section adjacent the first section having a second internal diameter greater than the first diameter and a third section adjacent the second section having an internal diameter less than the second diameter, a first probe seal integral with the first section, a second probe seal integral with the third section and a passage in fluid communication with the first shoulder and the second section positioned for fluid communication with the annular groove in the first shoulder of the central axial bore of the body when the flow piece is inserted in the bore; a retainer nut in threaded engagement with the central axial bore which bears against the second shoulder of the annular flow piece and seats the first shoulder of the annular flow piece against the first shoulder in the central axial bore.