A spherical decoupler conduit for connecting misaligned components, and a method for making the same, where the spherical decoupler includes an inlet connection with a first spherical portion; an outer slider with a second spherical portion for pivotably mating with the first spherical portion and a tubular portion; an inner slider having a tubular portion in a telescoping relationship with the tubular portion of the outer slider and a third spherical portion; and an outlet connection with a fourth spherical portion for pivotably mating with the third spherical portion.

A mandrel with an elastic sleeve utilizing hydraulic pressure for hydroforming hollow metal cylinders is disclosed. This invention simplifies the manufacturing process of the hydroforming device and reduces the associated cost, through the use of fluid pressures upon the elastic sleeve that biases forcefully against the interior of the metal cylinder being shaped. In the case where containment of the hydorforming fluid is desired, so as to prevent any contamination of the interior of the cylinder being shaped, this technology can provide that containment more reliably. The elastic sleeve material used is reasonably flexible, and more durable than other materials used in related devices.

A method of joining a tubular member and a pipeline configured to convey corrosive products comprises preparing a tubular member with an inner seat; inserting the end of a pipeline inside the inner seat; inserting a sleeve of corrosion-resistant material inside the end of the pipeline; inserting an expandable mandrel inside the sleeve; and expanding the expandable mandrel to join the end of the pipeline and the tubular member, and seal the sleeve and the pipeline to protect parts of the pipeline, sensitive to corrosive products, via the sleeve.

Disclosed is a joining method of members, which includes the steps of: preparing a first member in which a first hole portion having a polygonal cross-sectional shape is formed, and a second member having a hollow shape, wherein the second member has a cross-sectional shape corresponding to the polygonal cross-sectional shape of the first hole portion, the second member including a plurality of straight line portions extending linearly and corner portions positioned between the adjacent two straight line portions in the cross-sectional shape; inserting the second member into the first hole portion of the first member; and caulking and joining the second member to the first member by enlarging and deforming the corner portions.

A flexible bladder can be expanded to insert a tool by implementing a tool assembly that includes an elongated hollow member including a hollow portion to receive at least one of a flexible bladder or a tool. An inlet member is attached to an end of the elongated hollow member. The inlet member receives at least one of the flexible bladder or the tool. A port is positioned on the elongated hollow member to apply vacuum inside the elongated hollow member.

An arrangement for working a tube end includes: an operating cylinder with a piston displaceable along an longitudinal axis; and a tube mounting, a tool holder being provided at an end of the piston facing the tube mounting. The operating cylinder is provided as a tandem cylinder. At least two cylinder stages are offset along the longitudinal axis. The piston includes connected piston segments, each piston segment being allocated to a cylinder stage.

A hydraulic tool including a tank, which is filled with oil, a hand pump connected to the tank in fluid communication, having a spring-loaded lever mechanism, which is in operative connection with a pump piston, with a piston cylinder system as actuator, which is connected to the pump in fluid communication with a non-return valve, wherein the piston surface of the actuator is a multiple of the piston surface of the hand pump.

A joining method of a structure includes preparing a first member including a first portion provided with a first hole and a second portion provided with a second hole, a second member, a die, and an elastic member, inserting the second member into the first hole, inserting the elastic member into the second member, in a state where one end of the second member in an axial direction is located between the first portion and the second portion, compressing and expanding the elastic member in the axial direction, thereby expanding and deforming the second member at a portion passing through the first hole to be swaged and joined to the first portion. The die includes a support surface for applying a compressive force from the die to the elastic member through the second hole. The support surface is perpendicular to an axial direction of the elastic member.

A pipe expanding device includes: a clamping assembly including a pipe expanding end, an opposite connecting end, and a receiving space in communication with the pipe expanding end and the connecting end; a pipe expanding assembly movably disposed in the receiving space; a connecting member disposed at the connecting end; and an elastic member disposed in the receiving space and located between the pipe expanding assembly and the connecting member to push the pipe expanding assembly back toward the connecting end after the pipe expanding assembly is moved toward the pipe expanding end. The elastic member is hidden in the clamping assembly and capable of automatically pushing the pipe expanding assembly back to its original position. Therefore, the motion of the pipe expanding assembly won't be affected by the displacement of the pipe expanding tool, and the pipe expanding assembling therefore won't get bent or fall off.

A spherical decoupler conduit for connecting misaligned components, and a method for making the same, where the spherical decoupler includes an inlet connection with a first spherical portion; an outer slider with a second spherical portion for pivotably mating with the first spherical portion and a tubular portion; an inner slider having a tubular portion in a telescoping relationship with the tubular portion of the outer slider and a third spherical portion; and an outlet connection with a fourth spherical portion for pivotably mating with the third spherical portion.