Patent ID: 8444341

Claim:
A structure comprising two tubular elements orthogonally oriented to one another, wherein each of said two tubular elements ( 10 , 12 ) has a quadrangular section with a plurality of pairs of shaped recesses ( 14 , 14 ′) formed on at least one face of each tubular element and one of said tubular elements is provided with aligned holes ( 38 , 40 ) arranged on two opposing faces of said one tubular element, and a connection device for the stable connecting and constraining of said two tubular elements, wherein said connection device comprises: a) a U-shaped band ( 22 ) adapted to partly delimit said orthogonally oriented tubular elements, said U-shaped band having opposing vertical and parallel branches ( 18 , 20 ) with pairs of projections ( 16 ) complementary to the plurality of pairs of shaped recesses ( 14 , 14 ′) formed on the tubular elements ( 10 , 12 ), said projections ( 16 ) project from an inner face of the opposing branches ( 18 , 20 ) of said U-shaped band; b) a bush ( 32 ) adapted to extend between a hole ( 26 ) formed in one of said branches ( 18 , 20 ) of said U-shaped band and a collar ( 28 ) projecting inwardly from the other of said branches, said bush being adapted to extend transversely between the aligned holes ( 38 , 40 ) of the one of said tubular elements when said connection device connects said two tubular elements, said bush having an internal bore with a first diameter and having at least one annular lowering ( 36 ) with a second diameter being less than said first diameter and including a longitudinally extending slit ( 34 ); and c) a screw ( 30 ) adapted to be received in the bore of said bush ( 32 ) at an end opposing said collar ( 28 ), said collar ( 28 ) being internally threaded ( 28 ′) to receive the threads of said screw whereby the screw crosses the aligned holes ( 38 , 40 ) of said one tubular element when said connection device connects said two tubular elements, said at least one annular lowering ( 36 ) of said bush being adapted to center said screw in the bore of said bush and said slit ( 34 ) of said bush being adapted to open slightly with engagement of said screw with the threads ( 28 ′) of said collar ( 28 ) so as to allow said bush to precisely fit on said collar and delimit the extent of threaded engagement of said screw with the threads ( 28 ′) of said collar.