Abstract: One aspect of the invention provides a composite refrigeration line set including: a suction line and a return line. One or more of the suction line and the return line are a composite refrigeration line set tube including: an inner plastic tube; a first adhesive layer circumferentially surrounding the inner plastic tube; an aluminum layer circumferentially surrounding the first adhesive layer and coupled to the inner plastic tube via the first adhesive layer; a second adhesive layer circumferentially surrounding the aluminum layer; and an outer plastic layer circumferentially surrounding the aluminum layer coupled to the aluminum layer via the second adhesive layer. The inner plastic tube is polyethylene of raised temperature. The outer plastic tube is polyethylene of raised temperature. The aluminum layer includes an alloy selected from the group consisting of: AL 3004-O, AL 3005-O, and AL 3555-O. The aluminum layer is butt-welded to itself.

Abstract: Provided is a burner tile that has good fire resistance, good heat resistance, good erosion resistance, and good thermal shock resistance. A burner tile 1E includes a molded inorganic fiber product and has a burner main hole 3E. The burner tile 1E includes an inner layer 120 including a combination of inorganic fiber rods 121 and 122 such that the inner layer 120 defines an inner circumferential surface of the main hole 3E, and an outer layer 130 formed by surrounding an outer circumferential surface of the inner layer 120 with the molded inorganic fiber product. Part of the burner tile 1E extending along the inner circumferential surface of the main hole 3E has a high bulk density achieved by highly concentrating an inorganic binder in the inorganic fiber in part including the inner circumferential surface.

Abstract: Provided is a hose rubber composition having improved adhesiveness to wires while maintaining rubber characteristics, and containing: acrylonitrile-butadiene rubber (NBR) and ethylene-propylene-diene rubber (EPDM) as rubber components; and further containing: a cobalt salt of an organic acid and hydrotalcite, in which 0.5 to 5 parts by mass of the hydrotalcite is contained with respect to 100 parts by mass of the rubber components.

Abstract: Techniques and mechanisms to form a reinforcement structure including dirt processed during drilling of a tunnel. In an embodiment, a device includes a drill head to drill an underground tunnel, where a housing of the device takes in dirt produced by such drilling. A mixer and other components of the device variously condition the dirt to produce a casing material that is subsequently provided to a compactor of the device. The compactor extrudes the casing material through a die. The extruded casing material is eliminated from the device to form a reinforcement structure at one or more sides of the tunnel. In another embodiment, a fiber optic cable is paid out from the device into the tunnel during the drilling, or is pulled into the tunnel by the device during the drilling.

Abstract: A flexible pipeline for transporting a pressurized flowable medium, includes two pipes of metal which are undulated transversely of their longitudinal direction, an inner pipe and an outer pipe which are arranged concentrically relative to each other with the inclusion of an annular gap. A vacuum insulation is arranged in the annular gap between the two pipes. On the other side of the inner pipe is mounted a tension proof reinforcement which is connected at both ends of the inner pipe fixedly to the inner pipe.

Abstract: A flexible pipe body and a method for manufacturing flexible pipe body is disclosed. The flexible pipe body includes an internal pressure sheath, at least one insulating layer comprising a mesh layer comprising a plurality of pockets and an outer sheath.

Abstract: The air conditioning hose of this invention offers an extremely high level of resistance to permeation by refrigerants, including carbon dioxide, as well as good flexibility, high strength, the ability to bend to small radii without kinking, and the ability to be tightly coupled to refrigeration device components in a leak proof fashion. The subject invention specifically discloses a refrigerant hose comprising: (a) a core layer, wherein the core layer is comprised of a thermoplastic polymer, and wherein the core layer includes perforations; (b) a metal foil layer which is situated over the core layer; (c) plastic layer which is situated over the metal foil layer; (d) a rubber layer which is situated over the plastic layer, (e) a reinforcing layer which is situated over the rubber layer; and (f) a cover layer which is situated over the reinforcing layer, wherein the cover layer is comprised of a rubbery polymer.

Abstract: One aspect of the invention provides an energy dissipative tube including: a length of tubing; an inner resin layer surrounding an outer surface of said tubing; a metal foil adjacent to an outer surface of said inner resin layer; and an outer resin layer surrounding said metal foil and said inner resin layer. The outer resin has a property selected from the group consisting of: static dissipative and antistatic.

Abstract: An assembly, which consists of a flexible tubular pipe (1) for transporting hydrocarbon fluids including a metal carcass (10) produced by the short pitched helical winding of a profiled strip, the said strip defining a plurality of intervening gaps (10a) between each winding turn (10b), an inner polymeric sealing sheath, at least one metal armour layer, and an outer polymeric sheath, and of a secondary metal tube (2) coaxial to the tubular pipe (1)

Abstract: A water rationing device that controls and manages municipal household water usage including a signal conveying wired pipe having electrically conductive wires, a flow sensor coupled to the signal conveying wired pipe, a flow gauge, a first and a second control valve coupled to the signal conveying wired pipe, a first and a second pipe connector having push connectors, a converter connected to the electrically conductive wires via the push connectors, a power supply connected to the converter, and a first and a second transceiver connected to a controller that receives the water flow signal from the water flow gauge, sends and receives control signals to the first control valve and the second control valve, and sends and receives signals from the first and second transceiver.

Abstract: An unbonded flexible pipe with a length and a center axis along its length includes an internal sealing sheath surrounding the center axis, and at least two tensile armor layers having cross wound elements surrounding the internal sealing sheath. The two tensile armor layers include a first tensile armoring layer having a plurality of first helically wound, elongate armoring elements, and a second tensile armoring layer having a plurality of second helically wound, elongate armoring elements. The first helically wound, elongate armoring elements consist of a first material or a first combination of materials and the second helically wound, elongate armoring elements consist of a second material or a second combination of materials, where the first material or the first combination of materials is different from the second material or the second combination of materials. The unbonded flexible pipe further includes a galvanic barrier layer between the first and the second tensile armoring layer.

Abstract: The present technology includes an inner tube, the inner tube having a resin layer as an innermost layer and a rubber layer adjacent to the innermost layer. A material used in the resin layer is a resin composition that includes a resin including at least an ionomer containing a metal carboxylate, and a material used in the rubber layer is a rubber composition that includes a rubber including at least an epoxidized rubber.

Abstract: Flexible pipe body and method of manufacturing a flexible pipe body, the pipe body including a flexible pipe body, comprising: a tubular layer (304) for forming a collapse resistant layer, the layer comprising corrugations, the layer having a radially inner surface (314) and a radially outer surface (312), and each of the radially inner and radially outer surfaces having at least one groove (318, 322) provided therein, and at least one reinforcing element (310, 810) provided at least partially within the groove of at least one of the radially outer surface and the radially inner surface.

Abstract: A plastic hose with antistatic properties, comprising: a hose wall of plastic and a reinforcement of plastic, wherein the reinforcement has a higher stiffness than the hose wall. The equalizing of charge concentrations within the hose and the conduction of electrical charges away from the hose is to be ensured by means of an inner layer of an antistatic/dissipative or electrically conducting plastic.

Abstract: One aspect of the invention provides an energy dissipative tube including: a length of tubing; an inner resin layer surrounding an outer surface of said tubing, wherein said inner resin layer is substantially free of a fire retardant; a non-expanded metal foil adjacent to an outer surface of said inner resin layer; and an outer resin layer surrounding said metal foil and said inner resin layer, wherein said outer resin layer includes a fire retardant. Another aspect of the invention provides an energy dissipative tube include: a length of tubing; an inner resin layer surrounding an outer surface of said tubing, wherein said inner resin layer is static dissipative; a non-expanded metal foil adjacent to an outer surface of said inner resin layer; and an outer resin layer surrounding said metal foil and said inner resin layer, wherein said outer resin layer is conductive.

Abstract: A flexible pipe body for transporting production fluids containing one or more acidic components comprises a fluid-retaining inner polymeric barrier layer and at least one layer including a metallic component and arranged outside said barrier layer, wherein said polymeric barrier layer comprises a first, inner, sub-layer of a polymeric barrier material through which at least some of said acidic component may permeate and a second sub-layer formed on said first sub-layer including a material capable of reacting chemically with said acidic component to form reaction products which are non-corrosive to said metallic component.

Abstract: The present invention provides a silicon hose integrated with a sensor port, which includes a base hose and a sensor port. The sensor port includes a sensor connection portion and an embedded portion integrally formed therewith. By embedding the embedded portion in the hose, the sensor port is integrally fixed on an outer circumference of the hose. According to the present invention, it is possible to contribute to a reduction in cost and weight and an improvement in fuel efficiency.

Abstract: A hose comprising a tubular body of flexible material arranged between an inner and outer helically wound wire. The hose further comprises an elongate member having opposing longitudinal edges, the elongate member being helically wound around the tubular body such that the opposing longitudinal edges of the layer are in an adjacent or overlapping arrangement, wherein each longitudinal edge includes a formation capable of interengaging with a cooperating formation on the opposing longitudinal edge, wherein the elongate member is provided at least one reinforcing member which extends along the longitudinal axis of the elongate member.

Abstract: A hose comprising a tubular body of flexible material arranged between inner and outer gripping members, wherein at least one of the gripping members is made of a material, especially a composite material, which expands on cooling.

Abstract: A free venting pipe and method of forming same, comprising a permeable tubular core member with at least one permeable hoop reinforcement layer around the core member; a substantially non-permeable membrane layer positioned outside of the hoop reinforcement layer and at least one permeable tensile reinforcement layer positioned outside of the membrane layer whereby a free volume annulus does not exist between any of the layers of the free venting pipe. The hoop and tensile reinforcement layers are comprised of a laminate construction.

Abstract: A flexible hose for conveying fluids and suitable for high temperature environments, the hose comprising a core tube, a thermal insulating layer surrounding the core tube, a metal layer surrounding the thermal insulating layer, and a vented jacket surrounding the cover layer. The thermal insulating layer may be a fibrous material such as a silica fiber. The metal layer may also be a chemical resistant layer and be thermally stable up to at least about 550° F. The vented jacket may be a wire braid having interstices therein and formed from a corrosion resistant material.

Abstract: A gas tube structure includes a flexible tube. The end of the flexible tube is connected with a fixed connector. A sleeve is fitted on the fixed connector. The fixed connector and the sleeve are connected to a movable connector. The fixed connector has a connection section extending from an outer end thereof. The connection section has an annular seal groove and an annular buckle groove thereon. The sleeve has a sleeve hole therein, a stop flange at one end thereof and an engaging groove formed on in inner wall thereof. One end of the movable connector has a receiving hole and a C-shaped groove formed on an outer wall of the receiving hole. The C-shaped groove is adapted to receive a C-shaped buckle. The present invention has a stable connection, is safe for use, can lower the cost and enhances assembly efficiency.

Abstract: A hot gas conducting component, in particular for an exhaust system of an internal combustion engine, is described. To improve the insulation effect, an insulation to which heat-reflecting and/or heat-absorbing pigments are added is arranged at the component.

Abstract: One aspect of the invention provides an energy dissipative tube including: a length of tubing; an inner resin layer surrounding an outer surface of said tubing, wherein said inner resin layer is substantially free of a fire retardant; a non-expanded metal foil adjacent to an outer surface of said inner resin layer; and an outer resin layer surrounding said metal foil and said inner resin layer, wherein said outer resin layer includes a fire retardant. Another aspect of the invention provides an energy dissipative tube include: a length of tubing; an inner resin layer surrounding an outer surface of said tubing, wherein said inner resin layer is static dissipative; a non-expanded metal foil adjacent to an outer surface of said inner resin layer; and an outer resin layer surrounding said metal foil and said inner resin layer, wherein said outer resin layer is conductive.

Abstract: Flexible reinforced rubber hose adapted for conveying fluids under low temperatures and high pressures. The hose includes a inner tube formed of an acrylonitrile butadiene rubber (NBR) or other low temperature rubber compound having an elastic modulus of not greater than about 8.4 MPa (1200 psi), and an outer jacket formed of a chloroprene rubber (CR) or other low temperature rubber compound having a durometer of not greater than about 75 Shore A.

Abstract: A hose for use in bio-pharmaceutical applications includes an innermost tubular layer made from a fluoropolymer material. The tubular layer has an inner, relatively smooth and pure surface that defines an opening for transfer of various media. A layer of silicone is disposed next to an outer surface of the innermost tubular layer through use of, for example, an extrusion method. The outer surface of the tubular layer may first be modified by various treatments or chemicals to facilitate the adhesion of the silicone layer thereto. The silicone material may be solid or foamed. A reinforcement layer may be disposed adjacent to an outer surface of the silicone layer. The reinforcement layer may be formed of a wire braid having gaps. An outer jacket of silicone may be attached to the reinforcement layer and to the inner silicone layer through the gaps in the reinforcement layer.

Abstract: A subsea flexible pipe, including an internal sealing sheath (18), at least one tensile pressure armor layer (14, 16) wound around the internal sealing sheath, a retaining layer (12) having at least one reinforcing strip (34), the reinforcing strip having filamentary strands (36) directed substantially longitudinally. The filamentary strands (36) having polymer fibers (38). The polymer fibers have, at room temperature, an elastic modulus in excess of 55 GPa so that the reinforcing strip is able to prevent radial expansion of the armor layer, when the armor layer experiences radial force; and the polymer fibers furthermore have an elongation at break in excess of 4% such that the reinforcing strip is able to undergo deformation without breaking.

Abstract: The invention relates to a method of producing a flexible pipe comprising a metal carcass and an internal sealing sheath extruded onto the carcass, said 5 method comprising providing a metal carcass; heating an application section of said carcass, preferably using induction heating, to an application section temperature of at least 150° C.; extruding a non-cross-linked polyethylene material comprising a peroxide having an activation temperature above 150° C. onto said application section of said carcass; cross-linking the extruded 10 polyethylene in a cross-linking zone by raising its temperature to at least the activation temperature of said peroxide by exposing the extruded polymer material to electromagnetic waves, with a wavelength of between 0.5 ?m to 0.5 m, preferably infrared radiation; and cooling said cross-linked polyethylene material to obtain the internal sealing sheath.

Abstract: The invention relates to an unbonded, flexible pipe having a length and comprising a tubular inner sealing sheath, at least one metal armor layer and an outer sealing sheath. The unbonded, flexible pipe comprises at least one insulated length section comprising a fluid permeable thermally insulating cover surrounding the outer sealing sheath in the insulated length section. The thermally insulating cover is further surrounded by a liquid permeable jacket, and preferably the thermally insulating cover is liquid permeable. Because the liquid permeable jacket is liquid permeable, no substantial external pressure will act on the liquid permeable jacket, and accordingly the liquid permeable jacket will substantially not carry any pressure induced forces further to the thermally insulating cover. The unbonded, flexible pipe will thereby be more flexible than corresponding insulated prior art unbonded, flexible pipes with a non-liquid permeable jacket.

Abstract: A hose comprising a tubular body of flexible material arranged between elongate inner and outer gripping members, wherein the tubular body comprises a sealing layer arranged between inner and outer reinforcing layers, and wherein the outer gripping member is made of a flexible non-rigid material capable of being wound around the tubular body.

Abstract: A pipe comprising an outer rigid conduit and an inner tubular structure, the inner tubular structure comprising a flexible hose, wherein the hose comprises a tubular body disposed between inner and outer gripping members, the tubular body including a sealing layer, and being formed of a material capable of withstanding cryogenic temperatures, wherein the inner tubular structure has insulation properties sufficient to protect the outer conduit from the low temperature of cryogenic fluid flowing within the inner tubular structure.

Abstract: A vehicle exhaust component includes an outer shell defining an internal cavity and at least one internal pipe located within the internal cavity. A wire tube surrounds the internal pipe and is spaced apart from the pipe by a radial gap. This radial gap is filled with a fiber material.

Abstract: A flexible hose for conveying fluids and suitable for high temperature environments, the hose comprising a core tube, a thermal insulating layer surrounding the core tube, a metal layer surrounding the thermal insulating layer, and a vented jacket surrounding the cover layer. The thermal insulating layer may be a fibrous material such as a silica fiber. The metal layer may also be a chemical resistant layer and be thermally stable up to at least about 550° F. The vented jacket may be a wire braid having interstices therein and formed from a corrosion resistant material.

Abstract: The present invention relates to a flexible unbonded pipe comprising an inner liner capable of forming a barrier against outflow of a fluid which is conveyed through the pipe, and one or more armouring layers on the outer side of the inner liner. The flexible unbonded pipe comprises at least one polymer layer and at least one film layer, the polymer layer being bonded to the film layer via one or more bondings selected from the group of chemical bondings and physical bondings. The film layer may preferably be a metal film layer. The polymer layer may preferably be cross-linked polyethylene. The interfacial bonding between the polymer layer and the film layer should preferably be sufficiently strong to prevent creation of gas pockets between the layers when subjected to an increased pressure of aggressive fluids on the film side of the pipe.

Abstract: Compact flexible reinforce rubber hose adapted for conveying fluids under high pressure. The hose includes a thin inner tube formed of a vulcanized rubber.

Abstract: A hose for use in bio-pharmaceutical applications includes an innermost tubular layer made from a fluoropolymer material. The tubular layer has an inner, relatively smooth and pure surface that defines an opening for transfer of various media. A layer of silicone is disposed next to an outer surface of the innermost tubular layer through use of, for example, an extrusion method. The outer surface of the tubular layer may first be modified by various treatments or chemicals to facilitate the adhesion of the silicone layer thereto. The silicone material may be solid or foamed. A reinforcement layer may be disposed adjacent to an outer surface of the silicone layer. The reinforcement layer may be formed of a wire braid having gaps. An outer jacket of silicone may be attached to the reinforcement layer and to the inner silicone layer through the gaps in the reinforcement layer.

Abstract: It is the object of the present invention a thermoplastic element for the protection against corrosion in the thermofused splicing of a thermoplastic tube to a thermoplastic connection, which element has the shape of a fully thermoplastic tubular sleeve, able to be introduced into a socket mouth formed by the expansion of the tube end, said splice element bearing only one internal diameter and two external diameters which define a cylindrical external portion of larger diameter and a tubular projection which diameter is smaller than the former, and which is introduced into the thermoplastic tube, a lateral wall of the external portion defining a front butt of said thermoplastic element against the end of the thermoplastic tube. Said splicing element also exhibits an auxiliary ring which operates as a reference point for the assembly thereof.

Abstract: The present invention relates to a flexible unbonded pipe comprising an inner liner capable of forming a barrier against outflow of a fluid which is conveyed through the pipe, and one or more armouring layers on the outer side of the inner liner. The flexible unbonded pipe comprises at least one polymer layer and at least one film layer, said polymer layer being bonded to said film layer via one or more bondings selected from the group of chemical bondings and physical bondings. The film layer may preferably be a metal film layer, such as aluminum film, stainless steel film or duplex film. The polymer layer may preferably be cross-linked polyethylene. The interfacial bonding between the polymer layer and the film layer should preferably be sufficiently strong to prevent creation of gas pockets between the layers when subjected to an increased pressure of aggressive fluids (hydrogen sulphides, methane and carbon dioxide) on the film side of the pipe.

Abstract: The present invention relates to a flexible unbonded pipe comprising an inner liner capable of forming a barrier against outflow of a fluid which is conveyed through the pipe, and one or more armouring layers on the outer side of the inner line. The flexible unbonded pipe comprises at least one polymer layer and one film layer, said polymer layer being bonded to said film layer. The film layer may preferably be a metal film layer, such as aluminum film, stainless steel film or duplex film. The polymer layer may preferably be cross-linked polyethylene. The interfacial bonding between the polymer layer and the film layer should preferably be sufficiently strong to prevent creation of gas pockets between the layers when subjected to an increased pressure of aggressive fluids (hydrogen, sulphides, methane and carbon dioxide) on the film side of the pipe. Thereby, it is possible to protect armour layer(s) from aggressive fluids.

Abstract: A device for cutting reinforced hose to length with limited contamination gaining access to the interior of the hose is disclosed. The device may employ a first rotating blade to circumferentially cut through an outer cover of the hose without penetrating through an interior liner of the hose. The outer cover may be composed of an elastomeric cover reinforced with metallic strands. By preventing the first blade from penetrating the interior liner, the contamination from the kerf created by the blade is not able to access the interior of the hose. After the first blade performs its partial cut around the outer circumference of the hose, the hose may be cleaned and a second blade may be used to cut through the interior liner. The second blade results in very little contamination and thus a cut length of hydraulic hose is created with greatly reduced levels of contamination within the hose without needing a post-cutting cleaning operation.

Abstract: The pipe is intended for carrying a petroleum effluent comprising at least one of the acid compounds CO2 and H2S. The pipe comprises at least one metal element (3, 5) and a tubular sheath made of a polymer material (2, 4), the metal element being provided outside the sheath. The sheath consists of a mixture of a polymer material with a predetermined amount of products chemically active with said acid compounds so as to irreversibly neutralize the corrosive effects of said compounds and to limit the corrosive effects on said metal elements. The pipe is characterized in that the chemically active products are incorporated into the sheath in form of particles of specific surface area above 5 m2/g.

Abstract: There is disclosed an umbilical assembly comprising at least one elongated umbilical element, and at least one light weight, high strength reinforcing rod.

Abstract: The invention relates to a flexible pipe for transporting hydrocarbons, comprising the following, from the inside towards the outside: a cylindrical structural set adapted in such a way that it can withstand radial stress and at least one first armure lap, said first armure lap comprising a plurality of armure threads wherein the armure threads consist of formed and flattened metal threads, the width of said armure I being greater than the thickness e when they are wound in parallel in the form of a spiral with a longitudinal pitch around the structure set, said threads forming an angle of less than 60° angle with the generators (G) of said structural set, and the width/thickness ratio of the armure threads is greater than 4.

Abstract: A hose (10) comprising a tubular body (12) of flexible material arranged between an inner and an outer helically wound wire (22, 24). The hose (10) further comprises an elongate member having opposing longitudinal edges, the elongate member being helically wound around the tubular body such that the opposing longitudinal edges of the layer are in an adjacent or overlapping arrangement, wherein each longitudinal edge includes a formation capable of interengaging with a cooperating formation on the opposing longitudinal edge.

Abstract: The invention concerns an elongated, multilayered tubular body (1) comprising an elongated, tubular inner hollow core (5), an elongated, tubular inner casing (4) and an elongated, tubular outer casing, the inner casing surrounding the hollow core, the outer casing surrounding the inner casing, the outer casing comprising at least two layers (2,3), each layer consisting of one or more longitudinally preformed, flat elongated metal strips, the preforming of the strips such that the strips have been bent helically in such, a way that the consecutive windings of the helix touch or almost touch to each other, each strip in one layer overlapping with other strips in other layers, the layers in the outer casing being bound to each other by an adhesive.

Abstract: The present disclosure is directed to embodiments of composite tubing having properties tailored to meet a wide variety of environmental and working conditions. Composite tubes disclosed herein may include one or more of the following layers: a internal liner, a composite layer, a thermal insulation layer, a crush resistant layer, a permeation barrier, buoyancy control layer, a pressure barrier layer, and a wear resistant layer. Grooves may be provided in one or more layers of the composite tube to provide increased axial permeability to the composite tube. A venting system, including vent paths, may be provided in the composite tube to vent fluid that may become trapped within the wall of the composite tube.

Abstract: An undersea flexible pipe for conveying hydrocarbons, the pipe including from the inside to the outside an inner sealing sheath (18), at least one ply of traction armors (14, 16) wound about the inner sealing sheath, a deformable holding layer (12) including at least one flexible ribbon or holding band wound about the traction armour ply, and at least one tubular structure (10) surrounding the holding layer, wherein the ribbon includes fiber strands are oriented substantially in the longitudinal direction of the ribbon. The ribbon is covered by a reinforcing layer of a polymer material for the deformation resistance of said holding layer.

Abstract: The invention relates to a flexible tubular duct for transporting gases under high pressure in the field of offshore oil exploitation. The duct is of the unlinked and smooth passageway type, and comprises from inside to outside an inner polymer tube, a pressure vault formed by the short-pitch rolling of at least one wire, a first inner pair of crossed traction armour plies, an intermediate polymer sleeve, a second outer pair of crossed traction armour plies and an outer polymer sleeve. The inner pair of traction armour plies is wound with a helical angle of less than 35° and the outer pair of traction armour plies is wound with a helical angle substantially equal to 55°.

Abstract: The invention relates to a flexible pipe for transportation of fluids and gasses, e.g. useful in water transportation, and in offshore transportation of crude oil e.g. from seabed to an installation or between installations. The flexible pipe of the invention comprises a new type of armouring layers which is made from a combination of one or more profiled wires and one or more metal strips. A folded strip is an endless unit with at least one fold and a width which in unfolded condition is at least 6 times its thickness, such as at least 10, such as at least 15, such as at least 25 times its thickness or even up to 100 or 500 times its thickness. A profile is a preshaped non-folded cross sectional profile. The profile may preferably have a width of less than 6 times its thickness. The term ‘endless’ is used to indicate that the tapes and profiles are very long compared to their other dimensions.

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.