Patent ID: 8813782

Claim:
A hydraulic fitting for hydraulic pipes, comprising: a first fitting element in fluid communication with a first pipe, provided with a first valve for opening and closing the fluid communication with the first pipe; a second fitting element provided with a second valve for opening or closing a fluid communication with a second pipe; a removable means for connecting said first and second fitting elements and establishing a fluid communication between said first pipe and said second pipe, wherein said first and second valves are normally in a closing position and pass both into the opening position in the condition of connection of said first and second fitting elements, said first and second valves comprising respective first contact surfaces, which can be superimposed precisely, and respective second contact surfaces, which can also be superimposed precisely and are mobile with respect to the first contact surfaces in order to pass between a position of closing and a position of opening of the fluid communication between said first and second pipes, wherein said first fitting element comprises a tubular body and a hollow cylindrical pin, inserted in a fluid-tight way inside the body, said hollow cylindrical pin comprising radial holes, wherein said cylindrical pin can communicate with said body through said radial holes, said pin communicating at an outer end with said first pipe, while being provided at the inner end with a first contact surface with spherical geometry, said first fitting element further comprising a moving element, mobile inside the body against the thrust of a spring and slidable in a fluid-tight way on said pin for opening/closing said radial communication holes, the moving element being provided at one end with said second contact surface with plane geometry, said second fitting element comprising a tubular element having an internal cavity, which communicates with said second pipe and is provided at the inner end with said second contact surface designed to come into contact in use with the contact surface of the moving element, said moving element comprising a cylindrical body, said cylindrical body comprising two seats housing respective seal gaskets for opening/closing said radial communication holes, said seal gaskets being separated by an intermediate ring, said second fitting element further comprising a ball, designed to come into contact in use with the spherical surface of the pin and arranged so that said ball can move inside the cavity being kept normally in the closing position against a gasket by a thrust spring.