A draining device, which can discharge permeated water and/or rainwater quickly, and adapt to different construction requirements is provided. The draining device may have a permeable wall body. The permeable wall body may have a plurality of ribs, where a cross section of the ribs in a first direction is wavy, and a wave amplitude of the cross section gradually changes, from a first side to a second side, in a second direction. Therefore, the ribs have alternating wave crest parts and wave trough parts at either side of the first direction. The wave crest part of one rib, among two adjacent ribs is opposite to the wave trough part of the other. The first direction intersects the second direction. The second direction is a thickness direction of the permeable wall body.

The invention relates to a thermoplastic elastomeric bellow duct (10) having a corrugated duct segment (12) interposed between two elbowed segments (14, 18), wherein at least one of the elbowed segments (18) is made of thermoplastic elastomeric and connected to an end section (22) of the corrugated duct segment (12) by overmolding the elbowed segment (18) over the end section (22) of the corrugated duct segment (12), and wherein the end section (22) of the corrugated duct segment (12) includes a guiding and sealing arrangement (50) pointing away from the corrugated duct segment (12) in a radial direction (32). The invention further relates to an air duct (80) having such a thermoplastic elastomeric bellow duct (10).

Disclosed are a flexible pipe and a manufacturing method thereof. The flexible pipe includes an outer bellows formed in a corrugated tubular shape with mountains and valleys, an inner bellows formed in a corrugated tubular shape with mountains and valleys and provided inside the outer bellows, a pair of flanges connected to both ends of the outer bellows and the inner bellows, respectively, and a detection unit for checking whether leakage occurs due to damage or breakage of the outer and inner bellows by detecting an amount of oxygen present in an air having an atmospheric pressure and filled in an atmospheric space between the outer and inner bellows. Leakage due to damage or breakage of the outer and inner bellows can be detected based on variation in the amount of oxygen present in the space between the outer bellows and the inner bellows.

The present invention provides a corrugated tube and a method for manufacturing the same capable of improving workability in press-fitting work of a pipe or a quick connector. A corrugated tube includes a flexible section having a first corrugated section and a second corrugated section, and straight sections integrally formed at both ends of the flexible section respectively. A length of valley portions in an axial center direction is larger than a length of valley portions in the first corrugated section, thereby allows a pitch P2 of mountain portions in the second corrugated section provided between the straight section and the first corrugated section to be larger than a pitch P1 of mountain portions in the first corrugated section.

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 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.

A corrugated tube with a plurality of wave valleys and wave crests, which are alternately arranged in a longitudinal direction of the corrugated tube, and a plurality of wave flanks, which connect the wave valleys and the wave crests to each other, wherein each wave flank comprises a first wave flank section, a second wave flank section, and a bending section arranged between the first wave flank section and the second wave flank section, and wherein the bending section is elastically deformed during bending of the corrugated tube such that the first wave flank section is swiveled in relation to the second wave flank section.

A polymeric device including: an elongated hollow tube having an outer surface; and a spiral fin wound around the outer surface of the hollow tube; wherein the hollow tube and the spiral fin are formed of a single unitary piece through a molding process. The polymeric device can further include a longitudinal projection projecting from the outer surface of the hollow tube, the longitudinal projection having a greater thickness than other portions of the hollow tube and the longitudinal projection extending at least a portion of a longitudinal length of the hollow tube.

A hose end adaptor for holding an inner component to be nested within an outer tube of a hose includes a first support portion for receiving the outer tube and a second support portion on which a component to be nested within the outer tube is mountable.

A collapsible conduit includes an elongated sheet configured as a coil, the coil having a longitudinal axis, the elongated sheet having a first edge that includes a first hem and a second edge opposite the first edge and that includes a second hem, each hem including an overlapping portion that overlaps with the overlapping portion of the other hem, the first hem interlocked with the second hem to form an interlocking arrangement between the first and second edges, wherein the conduit is collapsible along the longitudinal axis between fully extended and collapsed positions, and wherein the overlapping portion of the each hem has an arcuate cross-section shape when the conduit is in both the fully extended and collapsed positions.

A hose arrangement includes an outer tube of flexible material and an inner tube of an elastic material for carrying fluid. Due to an action of the elastic inner tube, the hose has a shorter length in a contracted state in the absence of fluid pressure in the interior of the inner elastic tube and a longer length in an expanded state when the fluid pressure is applied to the interior of the elastic inner tube. The tube has an undulating state in the contracted state and controls and contains expansion of the inner tube when the hose is in the expanded state. At least one sleeve portion is provided between the elastic inner tube and the outer tube along a part of the elastic inner tube where undulation of the outer tube occurs in the contracted state for protecting the elastic inner tube from abrasion undulations of the outer tube.