Provided is a liquid pipe coupling universal joint capable of easily performing a pipe mount work even in a narrow space, remarkably reducing a piping work cost, providing a high coupling strength in a structure of the universal joint itself and excellent vibration and earthquake resistance.

Disclosed is a pipe coupling universal joint (100) in which an edge circumference (12, 13) of the first or second fitting portion (3, 7) is formed in a position separated from a reference plane (T) by a length (L) set to 21 to 23% of the maximum diameter length (R1, R2) of the first or second fitting portion (3, 7) on the reference plane (T) in a direction (V) opposite to a side where the straight pipe portion (1) is connected from the reference plane (T) defined herein.

An coaxial keg connector comprising a main body (1) made of plastic and having a first inlet port (3) and a second inlet port (3) receiving a stem (2). A coaxial outlet (10) comprises an outer outlet port (11) in communication with the first inlet port (3) and an inner outlet port (12) in communication with the second inlet port. The stem (2) comprises a tubular body with a main axis (31) with an inlet and a connector for attachment to the keg at one end. The second end of the stem opposite to the first end has an outlet in fluid communication with the inner outlet port (12) and comprises a ball joint (61) rotatably mounted in and sealed with respect to the main body (1) so as to be rotatable (12) about the main axis (31) of the tubular body and rotatable (67, 68) to a limited extent about axes perpendicular to the main axis.

A pipe coupling universal joint has a first fitting portion and a second fitting portion. An edge circumference of the first or second fitting portion is separated from a reference plane by a length set to 21 to 23% of the maximum diameter length of the first or second fitting portion on the reference plane in a direction opposite to a side where a straight pipe portion is connected from the reference plane.

Various systems and assemblies that can be utilized with hydraulic and other fluid flow lines are disclosed. According to one embodiment, the present application discloses an assembly that can include a first section, a second section and a third section. The first section can define a first passageway therein to receive and allow for passage of a fluid. The second section can define a second passageway that communicates with the first passageway. The second section and the first section together can form a first ball joint having an internal portion and an external portion. The first ball joint can comprise a moveable coupling between second section and the first section. The third section can define a third passageway that communicates with the second passageway. The third section can telescopically receive the second section therein and can be configured to form a linearly moveable joint between the third section and the second section.

Various systems and assemblies that can be utilized with hydraulic and other fluid flow lines are disclosed. According to one embodiment, the present application discloses an assembly that can include a first section, a second section and a third section. The first section can define a first passageway therein to receive and allow for passage of a fluid. The second section can define a second passageway that communicates with the first passageway. The second section and the first section together can form a first ball joint having an internal portion and an external portion. The first ball joint can comprise a moveable coupling between second section and the first section. The third section can define a third passageway that communicates with the second passageway. The third section can telescopically receive the second section therein and can be configured to form a linearly moveable joint between the third section and the second section.

An coaxial keg connector comprising a main body (1) made of plastic and having a first inlet port (3) and a second inlet port (3) receiving a stem (2). A coaxial outlet (10) comprises an outer outlet port (11) in communication with the first inlet port (3) and an inner outlet port (12) in communication with the second inlet port. The stem (2) comprises a tubular body with a main axis (31) with an inlet and a connector for attachment to the keg at one end. The second end of the stem opposite to the first end has an outlet in fluid communication with the inner outlet port (12) and comprises a ball joint (61) rotatably mounted in and sealed with respect to the main body (1) so as to be rotatable (12) about the main axis (31) of the tubular body and rotatable (67, 68) to a limited extent about axes perpendicular to the main axis.

Various systems and assemblies that can be utilized with hydraulic and other fluid flow lines are disclosed. According to one embodiment, the present application discloses an assembly that can include a first section, a second section and a third section. The first section can define a first passageway therein to receive and allow for passage of a fluid. The second section can define a second passageway that communicates with the first passageway. The second section and the first section together can form a first ball joint having an internal portion and an external portion. The first ball joint can comprise a moveable coupling between second section and the first section. The third section can define a third passageway that communicates with the second passageway. The third section can telescopically receive the second section therein and can be configured to form a linearly moveable joint between the third section and the second section.