Abstract: The hydraulic pressure relief depressurization valve assembly for quick coupling which is object of the present invention comprises a depressurization valve assembly (100) and (200) that can be assembled in any quick coupling that has a directional body (10) and (60), generally fixed to a manifold with access to the tank (20), an intermediate sleeve (30) and (80) and a port (40) for connection to the hydraulic system, inside which is a relief valve (50) and (90), that moves axially, provided with directional holes that make it possible to relieve the pressure during the connection and disconnection action (during the manual push and pull movement), so as to minimize the pressure forces and facilitate the installation and replacement or changing of hoses on the hydraulic line.

Abstract: A hydraulic coupling for a quick coupling, whether it is ISO A or ISO B type or flat face, which makes the hydraulic system more compact with a better distribution of the coupling forces, easier machining operation, and a coupling system between the couplings under a more efficient pressure. A first purpose of the invention is the improvement in hydraulic coupling for a quick coupling, which has a greater contact surface, employs a smaller diameter for the plug coupling connector in the socket coupling, allowing a greater amount of balls without reducing the material section between the holes that host the balls, and giving the same resistance to the connector as well as a greater support area due to the greater number of balls. Secondly, it is an improvement of the present invention a hydraulic coupling for a quick coupling, which adopts an asymmetrical geometry of the plug coupling peripheral duct that allows applying a more practical and economic tool.