Coupling device (12) for connecting elongated hollow bodies (26, 28) in an assembly system (10), comprising: a first receiving opening (32) for receiving a first elongated hollow body (26) and a second receiving opening (34) for receiving a second elongated hollow body (28), wherein the receiving openings (32, 34) are arranged relative to one another in such a way that the first and second elongated hollow bodies (26, 28) can be coupled to one another after introduction into the respective receiving openings (32, 34).

A flat flexible hose for transporting a fluid, for example water, is adapted to move between an inoperative position having a flattened configuration and an operative position, in which the hose expands radially under pressure from the fluid. The hose has a first inner layer defining an axis, a second covering layer, and a reinforcement textile layer therebetween. The first and second layers are made of a first and respectively a second thermoplastic elastomeric material adapted to adhere to each other. The reinforcement textile layer is made of rigid textile yarns which at least partially have a respective first and second predetermined inclination opposite to each other so that the length of the hose remains unchanged both in the inoperative and the operative positions. The reinforcement textile layer is a knitted layer with tricot chain stitches with rows of stitches and courses of stitches made of chain stitches.

Disclosed is a sealed air flow system suitable for use with a sample shaker assembly. The sealed air flow system includes at least one component which accommodates movement of the sample shaker assembly while maintaining an air tight assembly between components of the sealed air flow system.

Helically reinforced, flexible tubing or hose is formed from continuously extruded thermoplastic material helically circumferentially wound at a wrapping station around an array of bearing-supported rods that are concurrently but individually turned and are adjustably canted relative to an imaginary center axis. The tubing or hose being formed has a continuous reinforcing rib helically wound therearound and continuously integrally connected thereto. The resulting tubing or hose may be transversely severed at intervals along its length to provide discrete lengths of hose that are annealed while axially compressed to relieve stress.

Coupling device (12) for connecting elongated hollow bodies (26, 28) in an assembly system (10), comprising: a first receiving opening (32) for receiving a first elongated hollow body (26) and a second receiving opening (34) for receiving a second elongated hollow body (28), wherein the receiving openings (32, 34) are arranged relative to one another in such a way that the first and second elongated hollow bodies (26, 28) can be coupled to one another after introduction into the respective receiving openings (32, 34).

The present disclosure relates to a fluid path member for generating nano-bubbles, and a fluid path integrator and a nano-bubble generator that use the same. The fluid path member may be configured such that a perimeter length of a cross-section of a fluid path is greater than a cross-sectional area of the fluid path so as to maximize a friction area per volume of fluid. In addition, the fluid path member may be configured such that a single fluid path is continuously formed over several tens of meters or more without a joint. Further, the fluid path member may be configured with a high density. Accordingly, the fluid path member may have improved ability to generate the nano-bubbles. A fluid path member configured to generate nano-bubbles according to some embodiments of the present disclosure includes a body formed as a bendable single tube, wherein the body is configured such that one or more dividing walls dividing a fluid path space inside a fluid path so as to expand a surface area and a friction area of a fluid are continuously integrally formed along a flow direction of the fluid, wherein the body is formed of a soft material of any one of silicone, rubber, and soft resin material so as to be freely bent and wound, and wherein the body is manufactured by extrusion molding such that the one or more dividing walls are continuously formed in a longitudinal direction of the body.

A hose that includes a main body portion that defines a lumen extending therethrough and includes an outer surface, at least a first axially extending protrusion extending outwardly from the main body portion, and at least a first axially extending slot defined in the outer surface of the main body portion. The hose defines a hose axis. A portion of the first axially extending protrusion is secured in a portion of the first axially extending slot.

Provided herein is a fluid duct 2 comprising a tubular base wall 11 surrounding a duct channel and at least one bellows 10 formed along a section of the tubular base wall 11. The bellows 10 comprises a plurality of convolutes 12 having a profile 14 projecting radially from the base wall 11. At least one convolute 12 wraps around the duct channel at a wrap-around angle Ω of between 180° and 720° from a first end 22a to a second end 22b of the convolute 12, said second end 22b being offset in a flow direction F parallel to a centerline C of the duct channel by a non-zero offset distance D from the first end 22a.

In certain embodiments, a hose includes an inner tube, a filler material, and an outer cover. The inner tube has a cross-sectional shape and includes a cavity for transporting a substance. The filler material is provided around an outer periphery of the inner tube. The filler material includes a self-sealing material or a self-healing material. The outer cover is provided around an outer periphery of the filler material such that the filler material is between the outer cover and the inner tube. The outer cover has a D-shaped cross-sectional shape.

In order to provide a sealing element, in particular for use as a rod seal, piston seal and/or shaft seal, which ensures a reliable seal and which can be produced easily and economically, it is proposed that the sealing element includes a main body formed from a thermoplastic material, wherein the main body has obtained at least part of its final outer shape in a high-pressure process and/or in a high-temperature process.