Patent ID: 8567436

Claim:
A hydraulic connection assembly with a pressure discharge control, positionable between an onboard hydraulic circuit of an engineering vehicle and a removable hydraulic equipment, comprising: a one-piece body attachable on an outside of a hydraulic machine adjacent a hydraulic linkage and provided with at least one input hydraulic linkage connectable to a pressure line of the hydraulic circuit of the vehicle, at least one coupling suitable for connection with a feeding input of a removable equipment and a pressure discharge hydraulic linkage connectable to a draining line, at least one normally closed discharge valve positioned between said at least one input hydraulic linkage connectable to a pressure line and said pressure discharge hydraulic linkage connectable to a draining line and a pressure discharge control operable so as to cause the opening of said at least one normally closed discharge valve for the connection of said pressure line to the draining line for the discharge of the pressure existing in the hydraulic circuit of the vehicle, wherein said discharge valve is a sliding piston and said pressure discharge control includes a lever rotatable around a transversal axis between a stable resting position and a working position, wherein a side of said lever is capable of exerting an axial thrust on said sliding piston for the opening control of said valve, wherein said pressure discharge control comprises a rod rotatable around said transversal axis and is provided with a rounded portion adapted to axially push said sliding piston when said lever is shifted to the working position, and wherein said pressure discharge control comprises a sleeve positioned around said rod in an axially sliding manner against the thrust of an elastic means which is capable of holding said pressure discharge control in a position inserted within a housing compartment of said rod to firmly hold said rod in said resting position and a knob screwed on said sleeve for the traction of said sleeve from said compartment and the rotation of said rod in the working position.