| 摘要 |
A flat-surface quick coupling for coupling tubes extending between a pressurized fluid user device and fluid feeding means comprises a quick coupling ( 2 ) female part ( 1 ) and a quick coupling ( 2 ) male part ( 12 ), to which are coupled concentric tubes for providing a delivery duct and a return duct for a hydraulic fluid, the ducts delimited by the concentric tubes being operatively coupled to a delivery duct, respectively a return duct, made inside the quick coupling parts ( 1 ) and ( 12 ), said ducts, upon assembling the female part ( 1 ) and male part ( 12 ) being mutually operatively connected.
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