A tube assembly includes a first tube, a second tube, and a tube coupling. The tube coupling is for coupling the first tube to the second tube. The tube coupling may include protrusions, indentations, compressive rings, compressive bands, and/or connection members. The protrusions and/or indentions may be located on the first tube, the second tube, the compressive band, and/or the connection member. The compressive ring and/or compressive band is placed on an outer surface of the first tube and/or the second tube. The compressive ring provides an elastic compressive force to the first tube and/or the second tube such that the protrusion is secured within the indentation. The tube coupling provides a weld-free connection between the first tube and the second tube.

A tube assembly includes a first tube, a second tube, and a tube coupling. The tube coupling is for coupling the first tube to the second tube. The tube coupling may include protrusions, indentations, compressive rings, compressive bands, and/or connection members. The protrusions and/or indentions may be located on the first tube, the second tube, the compressive band, and/or the connection member. The compressive ring and/or compressive band is placed on an outer surface of the first tube and/or the second tube. The compressive ring provides an elastic compressive force to the first tube and/or the second tube such that the protrusion is secured within the indentation. The tube coupling provides a weld-free connection between the first tube and the second tube.

The pipe ball joint includes a casing having a socket portion with a substantially spherical interior surface and a first pipe segment extending from the socket portion. The socket portion has an annular groove disposed adjacent the partially spherical interior surface. A ball pipe section includes a ball segment received in the socket portion of the casing and a second pipe segment extending from the ball segment. A seal assembly is received in the annular groove of the casing and is disposed against the ball segment of the ball pipe section. The seal assembly includes a plurality of nested seal rings that each include a concave face and a convex face.

The pipe ball joint includes a casing having a socket portion with a substantially spherical interior surface and a first pipe segment extending from the socket portion. The socket portion has an annular groove disposed adjacent the partially spherical interior surface. A ball pipe section includes a ball segment received in the socket portion of the casing and a second pipe segment extending from the ball segment. A seal assembly is received in the annular groove of the casing and is disposed against the ball segment of the ball pipe section. The seal assembly includes a plurality of nested seal rings that each include a concave face and a convex face.

A sealing interface includes a first tube having an end with a convex surface and a second tube having an end with a convex surface. A spacer is disposed between the respective ends of the first and second tubes. One side of the spacer has a concave surface that substantially matches the convex surface of the end of the first tube, and another side of the spacer has a concave surface that substantially matches the convex surface of the end of the second tube. The spacer includes a through hole in fluid communication with a fluid passageway of the first tube and a fluid passageway of the second tube. Tying elements are respectively coupled to the first tube and the second tube, with the tying elements applying a compressive force between the first tube and the spacer, and applying a compressive force between the second tube and the spacer.

A sealing interface includes a first tube having an end with a convex surface and a second tube having an end with a convex surface. A spacer is disposed between the respective ends of the first and second tubes. One side of the spacer has a concave surface that substantially matches the convex surface of the end of the first tube, and another side of the spacer has a concave surface that substantially matches the convex surface of the end of the second tube. The spacer includes a through hole in fluid communication with a fluid passageway of the first tube and a fluid passageway of the second tube. Tying elements are respectively coupled to the first tube and the second tube, with the tying elements applying a compressive force between the first tube and the spacer, and applying a compressive force between the second tube and the spacer.

A hinged connection device includes first and second tubular components around a main axis which respectively include a first male hinge member provided with an end head shaped as a spherical segment and a second female hinge member provided with a complementary seat receiving movably inside the end head of the first member. The first member is configured to be housed at least partially inside the first component and to be assembled to the second component throughout the second member. The second member is configured to be mounted around the second component and assembled to the first component over the first member such that the two tubular components are assembled together by the reciprocal intersection of the two hinge members.

A hinged connection device includes first and second tubular components around a main axis which respectively include a first male hinge member provided with an end head shaped as a spherical segment and a second female hinge member provided with a complementary seat receiving movably inside the end head of the first member. The first member is configured to be housed at least partially inside the first component and to be assembled to the second component throughout the second member. The second member is configured to be mounted around the second component and assembled to the first component over the first member such that the two tubular components are assembled together by the reciprocal intersection of the two hinge members.

A double ball pipe coupling with two axes for connecting fluid pipes or conduits at eccentric angles while reducing or eliminating frictions loss. The coupling also provides movement of pipes or fluid pathways that are under low to high pressures. Two outer shell halves contain two ball joints with protruding connections and or outer fittings for most applications. The shell halves being mostly uniform or oblong or distorted for highly non-collinear connections. The ball joints containing pathways rotate within each shell half while permitting fluid flow as intended while greatly reducing restrictions.

A ball joint having first and second articulated coupling parts having interconnected liquid ducts. The second coupling part is held pivotably by a spherical front end region between a shape-adapted joint socket on the first coupling part and a joint head on a holding element in the inner cavity of the second coupling part. The holding element interconnects the liquid ducts, and the second coupling part has, on its inner wall delimiting the inner cavity, an annular groove with a ring seal. A first annular shoulder is on the inner wall of the second coupling part, an annular insert part is insertable into the inner cavity of the second coupling part, and the insert part is spaced apart from the first annular shoulder such that the spacing between the first annular shoulder and the front edge of the insert part facing the first annular shoulder forms the annular groove.