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An apparatus to fill a container includes at least one tank for a fluid product to be delivered and one filling head to deliver the fluid product to the container that is movable towards and away from the container. The apparatus further includes a connecting arrangement interposed between the tank

An apparatus to fill a container includes at least one tank for a fluid product to be delivered and one filling head to deliver the fluid product to the container that is movable towards and away from the container. The apparatus further includes a connecting arrangement interposed between the tank and the filling head to supply the fluid product to the filling head. The connecting arrangement includes a ball-and-socket joint structure which includes a first tubular portion having a spherical body, a second tubular portion in the form of a spherical cavity and a tubular sealing element arranged inside the first tubular portion and the second tubular portion at a zone in which the spherical body and the spherical cavity are mutually engaged.

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1. An apparatus for filling a container, comprising: at least one tank for a fluid product to be delivered;one filling head for delivering said fluid product to said container, said filling head being movable towards and away from said container;a connecting arrangement interposed between said tank

1. An apparatus for filling a container, comprising: at least one tank for a fluid product to be delivered;one filling head for delivering said fluid product to said container, said filling head being movable towards and away from said container;a connecting arrangement interposed between said tank and said filling head for supplying said fluid product to said filling head, said connecting arrangement comprising a ball-and-socket joint structure, said ball-and-socket joint structure comprising a first tubular portion comprising a spherical body and a second tubular portion comprising a spherical cavity, a tubular sealing element being arranged inside said first tubular portion and said second tubular portion at a zone in which said spherical body and said spherical cavity are mutually engaged, said tubular sealing element comprising a central portion, an end portion received in a seat of said first tubular portion and a further end portion received in a further seat of said second tubular portion. 2. The apparatus of claim 1, wherein said connecting arrangement comprises a first pipe and a second pipe and said ball-and-socket joint structure comprises a first ball-and-socket joint defined between said tank and a first end of said first pipe, a second ball-and-socket joint defined between said filling head and a further first end of said second pipe and a third ball-and-socket joint defined between a second end of said first pipe and a further second end of said second pipe. 3. The apparatus of claim 2, wherein said first pipe is a curved pipe and said second pipe is a straight pipe. 4. The apparatus of claim 1, wherein said tubular sealing element is made of plastics. 5. The apparatus of claim 1, wherein said tubular sealing element is made of elastomeric material. 6. The apparatus of claim 1, wherein said first tubular portion comprises a first tubular member and a tubular appendage mutually connected, said spherical body being associated with said tubular appendage. 7. The apparatus of claim 6, wherein said first tubular member comprises a first threaded portion and said tubular appendage comprises a second threaded portion which engages with said first threaded portion. 8. The apparatus of claim 6, wherein said spherical body is internally provided with a groove in which a rim of said tubular appendage is received. 9. The apparatus of claim 1, wherein said second tubular portion comprises a second tubular member and a fixing structure mutually connectable, and an intermediate element interposed between said second tubular member and said fixing structure. 10. The apparatus of claim 9, wherein said fixing structure comprises a ring nut screwed on a thread of said second tubular member. 11. The apparatus of claim 9, wherein said fixing structure and said intermediate element define said spherical cavity. 12. The apparatus of claim 9, wherein said spherical cavity is defined by a first portion of spherical cavity arranged in said intermediate element and a further portion of spherical cavity arranged in said fixing structure. 13. The apparatus of claim 1, wherein said first tubular portion comprises a first tubular member and a tubular appendage mutually connected, said spherical body being associated with said tubular appendage and wherein said seat is defined between said first tubular member and said tubular appendage. 14. The apparatus of claim 13, wherein said end portion comprises an inclined face which couples with a corresponding further inclined face of said first tubular member. 15. The apparatus of claim 13, wherein said end portion further comprises an annular element interacting with an abutting surface of said tubular appendage. 16. The apparatus of claim 1, wherein said second tubular portion comprises a second tubular member and a fixing structure mutually connectable, and an intermediate element interposed between said second tubular member and said fixing structure and wherein said further seat is defined between said second tubular member and said intermediate element. 17. The apparatus of claim 16, wherein said further end portion comprises an annular projection received in a corresponding annular groove of said intermediate element. 18. The apparatus of claim 1, wherein said filling head comprises a pouring chamber which receives said fluid product from said tank and delivers said fluid product to said container and a driving element slidable in a chamber, said chamber being connected to a source of an operating fluid. 19. The apparatus of claim 18, wherein said chamber is arranged on a carousel which supports said tank and said filling head. 20. The apparatus of claim 19, wherein said chamber is fixed to said carousel. 21. The apparatus of claim 17, wherein said chamber and said driving element cooperate to define a fluid cylinder which moves said pouring chamber between a rest position, in which said pouring chamber is spaced apart from a mouth of said container, and a working position, in which said pouring chamber interacts with said mouth. 22. The apparatus of claim 18, wherein said filling head further comprises a valve provided with a shutter element. 23. The apparatus of claim 22, wherein said valve comprises a further fluid cylinder which moves said shutter element between a closing position, in which said shutter element closes a pouring opening of said pouring chamber, and an opening position, in which said shutter element is spaced apart from said pouring opening. 24. The apparatus of claim 23, wherein said further fluid cylinder comprises a further driving element connected to said shutter element and slidable in a further chamber, said further chamber being connected to a source of an operating fluid. 25. The apparatus of claim 24, wherein said further chamber is obtained in said driving element.