Abstract: A seamless convoluted hose assembly. The assembly includes: a tubular inner liner having an outer surface, an inner surface, and an inner liner wall therebetween which defines a passageway. The assembly further includes a helical coil or a plurality of annular loops which produce convolutions in the outer surface of the tubular liner when the tubular inner liner is forced through the helical coil or plurality of loops under heat and pressure.

Abstract: In an existing pipe rehabilitating method according to an embodiment, a profile strip (2) for lining an existing pipe (10) is shaped using a thermoplastic resin, joint portions (21) are provided at both end portions in a width direction of the profile strip, and the profile strip (2) is inserted into the existing pipe (10) and is helically wound in the existing pipe (10). The joint portions (21) of adjacent windings of the profile strip (2) are interlocked with each other, thereby forming a rehabilitating pipe (20). Also, the profile strip (2) of the rehabilitating pipe (20) is deformed by a heating step in which the profile strip (2) is subjected to a heating process by a heating means so as to conform a shape of a curved portion (13) of the existing pipe (10), thereby integrating the profile strip (2) with an inner peripheral surface of the curved portion (13) of the existing pipe (10).

Abstract: Modified-profile metal strips, and annular and spiral metal pipes and other products formed from such strips. The strips comprise a plurality of spaced longitudinal ribs of size and transverse location selected to increase the strength of a given thickness or gauge of the strip and the associated strength of a product formed from the strip.

Abstract: A semi-rigid, flexible duct including a pair of coaxial sleeves, namely an inner sleeve and an outer sleeve disposed parallel to and about the inner sleeve and a resilient wound element disposed between the sleeves. Each of the inner sleeve and the outer sleeve constitutes an aluminum foil ribbon. The wound element imparts corrugations to the two sleeves, such that the duct is extendible between a compacted configuration suitable for storage and for shipping and an extended configuration suitable for installation in a gas transport arrangement. Both the inner sleeve and the outer sleeve are of a predetermined thickness rendering the duct substantially rigid when in an extended configuration and enabling the duct to maintain its substantial rigidity upon extension from a compacted configuration. Optionally, at least one of the sleeves further includes a second, plastic layer bonded to the aluminum foil ribbon layer.

Abstract: A hose construction adapted for efficiently conveying fluids while extended, but capable of neatly contracting to a fraction of its extended length for storage or transportation, while integrally incorporating lines for electrical requirements. Storage may be within an outer hose and may be triggered via closure of a valve within a nozzle so that negative pressure causes contraction of the folds of the hose. The contracted hose has a length that is a fraction of its normal extended length. The hose construction incorporates a wire reinforcing member which may bias the hose for self-extension and may also function as part of the electrical system. The electrical lines may comprise stranded copper wires to conduct power and/or serve as a remote activation circuit. The hose configuration may have a cover with external folds, which maximizes flow and provides a cushioning outer diameter to prevent damage to the hose.

Abstract: A composite strip (10) windable to form a helical pipe for transporting fluid is disclosed. The composite strip comprises: an elongate plastic strip (11) having a base portion (12), the base portion (12) having an upper side defining an outer face (15); and at least one lengthwise extending composite rib portion (20) upstanding from the outer face (15) of the base portion (12). The rib portion (20) has a distal end (23) remote from the base portion (12). The composite rib portion comprises: an elongate inboard reinforcing member (30) disposed within or adjacent to the base portion (12); an elongate outboard reinforcing (40) member disposed within the distal end (20) of the rib portion (20) parallel to the inboard reinforcing member (30); and an elongate intermediate plastic web (23) portion extending between the inboard and outboard reinforcing members (30, 40). When wound into a helical pipe, the composite rib portion (20) reinforces the pipe against radial crushing loads.

Abstract: Provided are a connection structure for connecting corrugated synthetic resin pipes and a corrugated synthetic resin pipe used in the connection structure. The pipe is lightweight, low cost, and simply structured with a small number of components, having sufficient resistance to water and pressure, and excellent sealing performance without the use of robust material or requiring high precision, and capable of being easily connected and manufactured. A first corrugated synthetic resin pipe 1A is provided at an end 10 with a cylindrical insert end 3 formed by adhering a synthetic resin layer 5 to the outer surface of the end 10 so as to fill at least corrugated recesses a. A second corrugated synthetic resin pipe 1B is provided at an end 11 with a socket 4 formed by adhering synthetic resin to the outer surface of the end 11 and cylindrically extending the resin outwardly in the axial direction.

Abstract: A crush resistant and stay put hose is provided. There is a helical member having a plurality of coils and a wall surface of one or more thermoplastic polymer layers. The layers extend from one coil to the next and the wall surface between the coils has at least one living hinge. When one portion of the hose is in an extended condition, the hose remains in the extended condition without reverting to the unextended condition. Methods of making the hose are also disclosed.

Abstract: A hose construction adapted for efficiently conveying fluids while extended, but capable of neatly contracting to a fraction of its extended length for storage or transportation, while integrally incorporating lines for electrical requirements. Storage may be within an outer hose and may be triggered via closure of a valve within a nozzle so that negative pressure causes contraction of the folds of the hose. The contracted hose has a length that is a fraction of its normal extended length. The hose construction incorporates a wire reinforcing member which may bias the hose for self-extension and may also function as part of the electrical system. The electrical lines may comprise stranded copper wires to conduct power and/or serve as a remote activation circuit. The hose configuration may have a cover with external folds, which maximizes flow and provides a cushioning outer diameter to prevent damage to the hose.

Abstract: A flexible collapsible corrugated drain pipe has a corrugation structure that permits a tight bending radius and relatively facile collapsing and expansion of corrugations, thereby permitting convenient manipulation and installation of drain pipe and packaging, display, storage and transportation of the collapsed pipe sections.

Abstract: The subject matter of the invention is a fabric layer of a bellows, e.g., of a connection between two hinge-linked vehicles or of an aircraft passenger bridge, the fabric layer being plastically deformed by a force acting on the fabric.

Abstract: An efficient flexible hose construction is provided which incorporates resistance, when subjected to high negative pressure loads, to the collapse failure known “rollover” or “shingling”. The construction relates to a means of increasing the torsion capability of a flexible hose where the hose is formed from a helical wire that is coated and thereafter is connected to and supports a shroud or cover. Improved resistance to rollover lies in mechanical enhancements to the interface between the helical wire and the coating material, where the enhancement assists in maintaining the wire and coating as an integral unit and prevents separation leading to shingling under high vacuum pressures. The mechanical enhancement requires use of a specialized cross-section for the helical reinforcing wire.

Abstract: The invention relates to corrugated pipe hose assemblies which are not provided with fixtures and which are used to transport preferably gaseous media in high-pressure applications, wherein a mount (3) is provided in order to receive an open end of the corrugated pipe (6) of the corrugated pipe assembly (2) and which is pressed therewith in order to form a metallic seal. The seal is obtained by means of a sealing bushing (25) between the inner wall (18) of one part (16) of the mount and the ribs (8) of the corrugated pipe (6). Another part (17) of the mount (3) firmly holds a section (27) of the covering (11) of the corrugated pipe hose assembly (2) in an axial direction and also with respect to tilting movements such that pivoting movements of the corrugated pipe hose assembly (2) do not result in a relative movement between the corrugated pipe (6) and the mount (3), especially with regard to one part (16).

Abstract: The present invention refers to a flexible conduit element for an exhaust system of a combustion engine vehicle, comprising a helically or annularly corrugated metal bellows member, an outer flexible member disposed around the bellows member and the resilient member biasing the flexible outer member towards the metal bellows member. In order to improve the absorption of vibrations of a combustion engine, the outer flexible member comprises a reticulated structure.

Abstract: A hose consisting of a smooth tubular wall and a rib wound spirally on the smooth tubular wall. The hose includes at least one duct portion and at least one connection portion; in the connection portions, the rib is wound spirally with a narrower pitch than on the duct portions.

Abstract: An elastically stretchable stretch hose (2) with a support spiral (4) acting as a tension spring and with a hose wall (6) connected with the support spiral (4) and consisting of a synthetic material, shall have a relatively low weight. Furthermore, it is desirable for various applications that the stretching force required for the extension is kept relatively low. For this purpose, the support spiral (4) is made, according to the invention, of a synthetic material.

Abstract: A flexible collapsible corrugated sewer hose has a collapsible and expandable corrugated section providing durability, a tight bend radius and a relatively small collapse ratio. An expansion of the corrugations permits convenient manipulation and installation of the sewer hose having a self supporting structure and crush resistance without helical reinforcement.

Abstract: The invention relates to piping comprising a portion wherein the centreline of the portion follows a substantially helical path, wherein the amplitude of the helix is less than or equal to one half of the internal diameter of the piping. When fluid flows in such piping, it is made to swirl. This provides a number of advantages, such as improved in-plane mixing of the fluid, enhanced uniformity of residence time, and so on. The invention also extends to various methods of making such piping.

Abstract: An integral hose anti-collapse rib comprises a unitary body having a first cantilevered portion curved in a first direction. This first cantilevered portion defines a first end. A second cantilevered portion is curved in a direction opposite the direction of the first cantilevered portion, in a direction facing the first cantilevered portion. The second cantilevered portion also defines a second end disposed at an opposite extent of the rib from the first end. The hose anti-collapse rib also comprises a locking mechanism that locks the first end of the rib to the second end of the rib, such that the first and second cantilevered portions together form a generally circular shape. However, in a relaxed state in which the locking mechanism is not engaged, the rib preferably defines a non-circular, generally spiral shape.

Abstract: The present invention relates to a method for making a plastic drainage pipeline reinforced by steel strips, comprising the steps of (1) steel strips and plastic being integrated to form a composite profile having ribs reinforced by steel strips; (2) the composite profiles being transported to an installation site; (3) the composite profiles being wound, and simultaneously the edge of the profile being melted and welded to form plastic drainage pipes reinforced by steel strips; and (4) a spigot joint being made at one end of the pipe. The present invention also relates to a plastic drainage pipe made by the method, comprising a plastic pipe body and reinforcing ribs integrated with the plastic pipe body as a whole, wherein the ribs of the plastic pipe are reinforced by steel strips enwrapped by the plastic. The present invention also provides an apparatus for making the plastic drainage pipe reinforced by steel strips.

Abstract: A hose includes at least an inner-layer tubular member, an intermediate layer, and an outer-layer tubular member. Both the inner-layer tubular member and the outer-layer tubular member are made of plastics. The intermediate layer is formed by wrapping a net. An outer surface of the intermediate layer is provided with a helical structure made of plastics and the outer-layer tubular member encloses the helical structure. The helical structure has a mechanical strength greater than the outer-layer tubular member. Since both the helical structure and the outer-layer tubular member are similarly made of plastics, the bonding strength therebetween can be enhanced. When the hose is subjected to bending, the helical structure helps to prevent the hose from being compressed and deformed, thereby maintaining the inside diameter of the hose to ensure smooth flow of liquid or gas through the hose.

Abstract: A limb for a breathing circuit manufactured from very thin walled polymer materials has an elongate axial reinforcing spine lying freely inside the conduit and fixed to each end connector. The spine is laterally compliant but axially stiff. The spine provides resistance to tensile and compressive loads on the conduit, including that induced by prevailing internal pressures.

Abstract: The present invention generally relates to flexible hose articles and methods. Some embodiments include hoses that can be reversibly bent and/or shaped. Furthermore, some embodiments can comprise methods for making and/or using such hose articles.

Abstract: The present invention is an electrical extensible hose that includes an outer shell, an inner core and at least one helical wire, which acts like a skeleton. In the present invention one implemented an additional wire that was conductive. The outer shell and inner core of the present invention may be bonded together via heat fusion. The helical wire is attached to the inner core via heat fusion. The helical wire supports the outer shell and inner core so as to form a tube. The outer shell and the inner core have a portion that forms an angular fold and have a portion that remains fixed. The second wire is attached at a point below the fixed portion of the electrical stretch hose so as to allow for maximum constriction caused by the shrinkable force created by the helical wire, thus increasing the stretch ratio of the hose.

Abstract: A flexible corrugated pipe, of a type comprising a plurality of overlapping material layers, comprises at least a coiled wire, and at least an electric cable, the coils or turns of said at least a wire and said at least an electric cable being arranged on a same plane, inside the wall of the pipe owing to the provision of the built-in electric cable, embedded in the thickness of the corrugated pipe, at a same position or level as the reinforcement metal coils, the outer corrugating configuration of the body of the tube is improved, thereby consequently improving the flexibility of the corrugated pipe.

Abstract: The present invention is an electrical extensible hose that includes an outer shell, an inner core and at least one helical wire, which acts like a skeleton. In the present invention one implemented an additional wire that was conductive. The outer shell and inner core of the present invention may be bonded together via heat fusion. The helical wire is attached to the inner core via heat fusion. The helical wire supports the outer shell and inner core so as to form a tube. The outer shell and the inner core have a portion that forms an angular fold and have a portion that remains fixed. The second wire is attached at a point below the fixed portion of the electrical stretch hose so as to allow for maximum constriction caused by the shrinkable force created by the helical wire, thus increasing the stretch ratio of the hose.

Abstract: The present invention relates to a flexible hose, preferably a charge-air hose for automotive vehicles, comprising at least one corrugated portion and a substantially tubular portion which is arranged at least sectionwise within the corrugated portion. In order to facilitate the mounting of such hoses, the present invention is so conceived that the corrugated portion is formed integrally with the tubular portion, and that the tubular portion is introduced, from an extended position in which the corrugated and the tubular portion are arranged in succession, into the corrugated portion by turning said tubular portion outside in.

Abstract: The object of the present invention is to provide a flow channel for liquids or also gases, which is of such a design that the lowest possible losses occur in the flow, in particular low frictional losses. A further aim of the invention is to provide a flow channel for liquids, in which different flow regions are set. A flow channel for liquids characterized in that at least one wall defining the flow channel is of such a configuration that when a liquid flows therethrough at least one flow region is produced which has an axial and simultaneous tangential flow component.

Abstract: A pipe having an axially extending bore is defined by a pipe wall including a corrugated outer wall having axially adjacent annular outwardly-extending crests separated by valleys. The pipe wall also includes a non-linear outer layer having adjacent concave portions and convex portions. The concave portions are aligned with the corrugation crests of the outer wall so that the convex portion of the outer layer extends outwardly between at least two corrugation crests to provide improved resistance to deformation.

Abstract: A limb for a breathing circuit manufactured from very thin walled polymer materials has an elongate axial reinforcing spine lying freely inside the conduit and fixed to each end connector. The spine is laterally compliant but axially stiff. The spine provides resistance to tensile and compressive loads on the conduit, including that induced by prevailing internal pressures.

Abstract: A flexible hose includes a hose body and a plurality of pleats formed on an outer circumferential surface of the hose body by predetermined intervals to give flexibility to the flexible hose. Each of the plurality of pleats includes an entering portion formed to be inclined to the outer circumferential surface of the hose body, and a head portion formed vertical to the outer circumferential surface of the hose body to extend from the entering portion, to be in fluid communication with an inside of the hose body via the entering portion.

Abstract: A diaphragm bellows includes a spiral-wound, pre-profiled metal strip having neighboring turns which are connected by a continuous welding seam in an area of an outer diameter or inner diameter of the metal strip. Neighboring flanks of the metal strip enter a region of the welding seam at an angle of less than 60°.

Abstract: A pipe manufacturing system and method for producing helically corrugated metal pipe is provided. The system and method utilize controlled profile formation.

Abstract: A tube is made of profiled metal strip which includes an end leg extending in parallel relationship to a tube axis, an inner leg extending in parallel relationship to the tube axis at a first distance, and an outer leg extending in parallel relationship to the tube axis at a second distance which is greater than the first distance. The inner leg is connected with the outer leg by a transition. A double-folded loop hook extends radially for connecting the end leg with one member from the group consisting of the inner leg and the outer leg, and an end hook extends radially and is connected to the other member of this group.

Abstract: A pipe arrangement for geothermal probes includes at least two pipes having at least one layer each that surrounds a lumen. One of the pipes functions as inflow pipe and the other pipe functions as return flow pipe. At least one of the pipes is produced at least in part from a non cross-linked polymer material and is distinguished in that the polymer material of the at least one layer for the pipes has a FNCT value (full notched creep test) according to ISO 16770 of at least 3000 hours.

Abstract: A flexible hose includes a bellows pipe wall and an air barrier. The bellows pipe wall includes peaks defined on an outer surface of the bellows pipe wall, valleys is adjacent a respective peak, and grooves defined on an inner surface of the bellows pipe wall. Each groove is under a respective peak. The air barrier is near each of the grooves to prevent air from entering the grooves.

Abstract: A pipe having an axially extending bore defined by a smooth inner wall fused to a corrugated outer wall is provided. The corrugated outer wall has axially adjacent, annular, outwardly-extending crests separated by valleys. The pipe further includes an outer layer fused to the outer wall, the outer layer having adjacent concave portions and convex portions, the concave portions being aligned with corrugation valleys of the outer wall so that each concave portion of the outer layer extends between at least two corrugation crests. A method of improving the resistance to deformation of a corrugated pipe having a smooth inner wall fused to an outer wall defined by annular crests and valleys is also provided.

Abstract: The present invention relates to a vacuum cleaner hose manufactured by continuously spirally winding one row or two rows of band-shaped materials extruded with an electric wire inserted therein. The vacuum cleaner hose is formed by spirally winding and sticking a band-shaped material having protrusions connected to each other in a line. In one embodiment, the vacuum cleaner hose is formed from one row of the band-shaped material 2 having a plurality of the hollow protrusions 4 inserted with the electric wire 5 and at least one hollow protrusion 4a inserted with no electric wire 5 is formed into the hose 1. In another embodiment, the vacuum cleaner hose is formed from two rows of the band-shaped materials 2 in which the protrusions of only one row of the band-shaped materials 2 are inserted with the electric wire 5.

Abstract: A leadthrough for passing conduits through constructional components includes a thread-forming thread (13) provided on an outer circumference (12) of a jacket tube (11) and extending from a first axial end region (15) toward a second axial end region (16), and a centering section (24) provided in the first axial end region (15) between the thread (13) and an end (25) of the jacket tube (11).

Abstract: A method of manufacturing a wire-reinforced flexible rubber hose that is particularly suitable for use in breathing air applications. The method includes positioning a section of wire-reinforced tubing on a forming mandrel and then positioning a sleeve of uncured rubber to cover the section of wire-reinforced tubing. Cording is then wrapped around the sleeve of uncured rubber such that each adjacent wrapping of cording is disposed between and separated by the wire helix of the wire-reinforced tubing. The sleeve of uncured rubber is cured while the cording is wrapped thereon to form a cured hose.

Abstract: A flexible corrugated pipe, of a type comprising a plurality of overlapping material layers, comprises at least a coiled wire, and at least an electric cable, the coils or turns of said at least a wire and said at least an electric cable being arranged on a same plane, inside the wall of the pipe. Owing to the provision of the built-in electric cable, embedded in the thickness of the corrugated pipe, at a same position or level as the reinforcement metal coils, the outer corrugating configuration of the body of the tube is improved, thereby consequently improving the flexibility of the corrugated pipe.

Abstract: The present invention provides tubes for, in an exemplary embodiment, dispensing loose fill insulation. The tube comprises an inner web formed in a tubular shape and having a plurality of spaced helical projections disposed along an inner surface thereof and extending towards a central longitudinal axis of the inner web, the inner surface of the inner web also forming an inner surface of the tube. A cap is disposed around an outer periphery of the inner web. The helical projections serve to condition the insulation as the insulation passes through the tube.

Abstract: A tubing includes an inner liner composed of one or more fluoropolymers, the inner liner being corrugated to define a trough, and having a wire disposed in said trough. The tubing further includes an outer layer, permanently secured to an exterior of the inner liner and covering said wire.

Abstract: A composite strip 10 windable to form a helical pipe is disclosed. The composite strip 10 comprises: an elongate plastic strip 11 having a base portion 12 and at least one lengthwise extending rib portion 20 upstanding from the base portion 12; and an elongate reinforcing strip 30 extending lengthwise and supported laterally by the rib portion 20, the reinforcing strip 30 having a height to thickness ratio of at least three to one and orientated substantially perpendicular to the base portion 12. When wound into a helical pipe, the reinforcing strip 30 reinforces the pipe against radial crushing loads. A bead 40 seals the reinforcing strip 30 from the environment. Desirably the composite strip 10 further comprises: a planar lamina 50 extending lengthwise and bonded to the base portion 12, the lamina 50 having a higher Young's modulus and strength than those of the plastic strip 11. The lamina 50 greatly improves the pressure rating of a pipe wound from the strip 10.

Abstract: An improved flexible hose for carrying fluids is disclosed. The hose has a first end and a second end, and is typically in a retracted position when no tensile force placed on an end of the hose and in an extended condition when a tensile force of a pulling nature is placed on an end of the hose. The hose has a thermoplastic cover on its outer surface. The thermoplastic cover has an interior surface and an exterior surface. On the interior surface there is a helical member adhered thereto this helical member being comprised of a material capable of carrying a current of electricity. The hose of the present invention stretches at least 100 percent over its at rest position when a pulling force is placed on one end of the hose.

Abstract: An object of the present invention is to provide a synthetic resin pipe configured to perform water stop accurately by forming a part connecting convex portions of an outer pipe to be flat without reducing flexibility in order to compose a synthetic resin pipe having flat inner and outer surfaces.

Abstract: This invention relates to a flexible tube that includes a bellows having a plurality of convolutes formed in the wall of said tube and extending above the top surface of the tube, said convolutes being spaced from one another in the axial direction of the tube, wherein at least one of said convolutes comprises two opposing bending sections and two restrained elongation sections positioned between the bending sections, and wherein the height of the bending sections above the top surface of the tube is greater that the height of the restrained elongation sections above the top surface of the tube.

Abstract: A composite hose comprises a corrugated metal tube as barrier layer against permeation of conveyed fluid and a reinforcing layer which is formed by braiding a reinforcing wire member made of a metal wire. A braid density of the reinforcing layer is 55% or less.

Abstract: A pipe for transporting automobile fluids includes a smooth inner tube (1) based on a fluorinated thermoplastic material, a corrugated outer tube (2) in contact with the inner tube via the inside peaks (3) of its corrugations, and made of a polyamide-based thermoplastic material, and elements for connecting the outer and inner tubes together.

Abstract: The present invention relates to a polytetrafluoroethylene (PTFE) tube, and more particularly to a PTFE tube for a flexible hose. In particular the invention relates to a PTFE tube having a smooth bore for use in the production of a lined hose assembly farther comprising hose braids, external hose protection and end fittings. The PTFE tube comprises external roots and peaks, which tube is obtainable from a non-convoluted tube having an original wall thickness W0 and an internal diameter ID by a process in which a region of the tube is thinned to provide external convolutions with a root wall thickness W1 characterised in that the convoluted PFTE tube has an improved resistance, of greater than 7.6%, to permeation by comparison with the non-convoluted tube, the comparison being made between tubes of (i) equal nominal bore ID; and (ii) equal weight of PTFE per unit length.