Patent ID: 8425280

Claim:
A machine for cutting, with hydro-abrasive jet, materials such as, for example, glass, stone, granite, marble, metals in general, and any other material that can be machined with the aforesaid technology, comprising one or more cutting heads ( 7 ) mobile according to one or more axes (X, Y, Z, 11 , 13 ) and including: a nozzle ( 8 ) for emission of a jet of water under pressure; a pipe ( 14 ) extending along a main axis ( 11 ) of the head ( 7 ), about which the head ( 7 ) is able to turn for supplying water under pressure to the nozzle; and a duct ( 19 ) for supplying an abrasive agent and adding said abrasive agent to the jet of water under pressure, wherein said duct ( 19 ) for the abrasive agent comprises a first duct portion ( 19 a ), fixed with respect to the head ( 7 ) in the movements of rotation about said main axis ( 11 ), and a second duct portion ( 19 b ), which is fixed with respect to said movements of rotation, and wherein a rotating distributor ( 23 ) is provided, which connects said first, rotating, portion ( 19 a ) to said second, fixed, portion ( 19 b ) of the duct ( 19 ) for supplying the abrasive agent, wherein said rotating distributor ( 23 ) comprises a stator ( 24 ), connected to the fixed portion ( 19 b ) of the duct ( 19 ), and a rotor ( 25 ), connected to the rotating portion of the duct ( 19 ), and in that said stator ( 24 ) and said rotor ( 25 ) are rotatably mounted on one another without the interposition of seal rings and define between them an internal chamber ( 26 ) which communicates with both of the aforesaid duct portions and is substantially at atmospheric pressure, and from which the abrasive agent descends simply by gravity down to an outlet of said duct ( 19 ) for the abrasive agent that converges into said pipe ( 14 ) for supplying water under pressure.