Patent ID: 8434530

Claim:
A filler valve unit ( 1 ) comprising: feeding means ( 2 , 7 ) for feeding a preset amount of filling liquid ( 3 ) into a container ( 6 ) wherein the feeding means ( 2 , 7 ) have an outlet ( 4 ) for feeding out filling liquid, the outlet ( 4 ) being a nozzle; injection means ( 9 , 10 ) for injecting a gaseous fluid into a container ( 6 ) wherein the injection means ( 9 , 10 ) have an outlet ( 11 ) for injecting gaseous fluid and are connected to the feeding means ( 2 , 7 ), at least one stop element ( 14 ) forming a stroke limiter acting on the container ( 6 ) and functionally connected to the feeding means ( 2 , 7 ) and to the injection means ( 9 , 10 ), the stop element ( 14 ) being mobile and moving between at least two operating positions consisting of: a first operating position wherein the stop element holds a mouth ( 5 ) of the container ( 6 ) at a preset flushing distance from the nozzle ( 4 ) of the feeding means ( 2 , 7 ); in the first operating position the mouth ( 5 ) not being in contact with the nozzle ( 4 ); a second operating position wherein the stop element ( 14 ) holds the mouth ( 5 ) of the container ( 6 ) at a filling distance from the nozzle ( 4 ) of the feeding means ( 2 , 7 ) which is less than the preset flushing distance, the filling distance being zero in order to prevent oxygen from entering the container during the filling stage; in the second operating position the mouth ( 5 ) being in contact with the nozzle ( 4 ); the preset flushing distance being the distance during a flushing stage between the mouth ( 5 ) of the container ( 6 ) and the nozzle ( 4 ) of the feeding means, the preset flushing distance permitting the gaseous fluid to fill the container ( 6 ) and at the same time expelling the oxygen inside the container ( 6 ); the filling distance being the distance between the mouth ( 5 ) of the container ( 6 ) and the nozzle ( 4 ) during the filling stage of the container with the filling liquid, the filling distance being less than the preset flushing distance; the feeding means ( 2 , 7 ), the injection means ( 9 , 10 ) and the stop element ( 14 ) being functionally connected to a control unit designed to control the movement of the stop element ( 14 ) and the operation of the feeding means ( 2 , 7 ) and the injection means ( 9 , 10 ).