Abstract: A continuous curve arch shape cross section leaching chamber made of molded thermoplastic has closely spaced corrugations and sidewalls, portions of which are perforated with horizontal slots. Either or both of the slot height and the local wall thickness which defines the slots may vary with slot elevation from the base, so that a perforated sidewall configuration is achieved which resists entry of surrounding soil.

Abstract: A continuous curve arch shape cross section leaching chamber made of molded thermoplastic has closely spaced corrugations and sidewalls, portions of which are perforated with horizontal slots. Either or both of the slot height and the local wall thickness which defines the slots may vary with slot elevation from the base, so that a perforated sidewall configuration is achieved which resists entry of surrounding soil. In one embodiment, the slotted sidewall has slots with all the same slot openings and the wall thickness decreases with elevation.

Abstract: In a corrugated pipe comprising two sections joined by telescopically mating a male end of one section with a female end of the other section, an annular sealing element is fixed to the exterior surface of the male end and disposed to sealingly engage the interior surface of the female end. An annular band of reinforcing material is disposed around the exterior surface of the female end at a position along the longitudinal axis thereof that is in general alignment with the sealing element. The reinforcing material resists loss of sealing engagement between the female end and the sealing element during use of the pipe.

Abstract: The present invention relates to a light weight building material (1) for structural work. The light weight building material (1) comprises at least three walls, a first wall (11), a second wall (12) and a third wall (13) formed from a single piece of galvanized iron sheet to form a triangular-section. However, a circular section may also be used while a rectangular section is preferred. The galvanized iron sheet is cut and cold-rolled to form the light weight building material (1).

Abstract: A twin-wall pipe comprises an internal pipe and an external pipe. The external pipe is corrugated, having elevations and troughs. The twin-wall pipe is further provided with a socket. In a transition portion towards the twin-wall pipe and the socket, provision is made for at least one overflow passage which interconnects the clearance between the external pipe and internal pipe in the vicinity of the transition portion and an adjacent elevation.

Abstract: A corrugated polyamide tube composed of a corrugated outer tube layer of polyamide resin and a flat inner tube layer fixed to the outer tube layer at bottom portions thereof, in which the inner tube layer is made essentially of a polyetheramide elastomer.

Abstract: A continuous curve arch shape cross section leaching chamber made of molded thermoplastic has closely spaced corrugations and sidewalls which are perforated with slots which slope downwardly, running from interior to exterior of the chamber. The slot height and or wall thickness vary with slot clevation from the base, to achieve a desired minimum Soil Threshold Angle in the slots, where said Angle parameter relates to resistance to entry of surrounding soil. Slotted wall thickness is less than about two times the thickness of the basic chamber wall thickness elsewhere. The chamber has properties and performance approximating prior art chambers, but has substantially less normalized weight and total weight.

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: Two-layered or three-layered polymer tubing for use as a pressurized fluid conduit in automobiles can be either walled or have walls continuously or partially corrugated. The tubing has an outer layer of a hard polymer molding material and an inner layer of a soft rubber-like polymer or a polymer mixture. The inner layer can be provided on the innerside with a layer of a thermoplastic adhesion-modified elastomer composition. The a materials are selected for the layers to provide a so-called “hard-soft-combination”. The rubber-like polymer composition has a hardness in the range of 30 Shore A to 60 Shore D, especially of about 30 Shore A to 90 Shore A, the compositions being selected so that they are processable by coextrusion or the so-called conex method and adhere directly to each other non-positively or positively fitted, i. e. without additional bonding agent, without delaminating.

Abstract: A corrugated pipe 2 has a plurality of corrugation structures 10, 12 positioned adjacent one another. The corrugation structures 10, 12 comprise an inner cylindrical wall 22, two annular wall portions 28, 32 that extend outwardly from the inner cylindrical wall 22, and a bowed annular wall portion 40 that is connected to the outer ends 36, 38 of the two annular wall portions 28, 32. The corrugation structure 10, 12 includes a centroid 48, 49 and at least a portion of the inner surface 50 of the bowed wall portion 40 has a radius R1 centered on the centroid 48, 49 and at least a portion of the outer surface 52 of the bowed wall portion 40 has a radius R2 centered on the centroid 48, 49. The cavity 56 defined by the corrugation structure 10, 12 has an inner surface with an inner radius R1, R3 that is equal to or greater than one half the thickness T1 of the inner cylindrical wall 22.

Abstract: In a wire harness protector comprised of a gutter-like protector main body with a bottom wall and both side walls, for accommodating corrugated tubes 9, into which a wire harness is inserted, in multi tiers in the vertical direction and a cover for covering an opening between upper ends of the both side walls of the protector main body, a wire holding spacer for positioning and holding the corrugate tube located in a lower tier within the protector main body, the wire holding spacer is formed integrally with one side wall of the both side walls of the protector main body through a hinge portion, and at position opposed to the other side wall of the both side walls of the wire holding spacer, a locking portion for engaging/releasing with/from an engaging portion of the other side wall is formed.

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: A vibration absorbing hose has a corrugated portion extending substantially entire part of the hose and end portions of straight cylindrical shape. The vibration absorbing hose has multi-layered construction of tubular inner rubber layer, pressure resistant reinforcement layer circumscribing an outer side of the inner rubber layer and outer rubber layer as outermost cover layer. The pressure resistant reinforcement layer is formed, for example, by braiding reinforcing yarns, so as to have corrugations along the corrugated portion of the inner rubber layer.

Abstract: A vibration absorbing hose including a corrugated portion has multi-layered construction of tubular inner rubber layer, pressure resistant reinforcement layer formed on an outer side of the inner rubber layer by providing reinforcing yarns. A radial depth B of the pressure resistant reinforcement layer at a position of each of corrugation valleys of the rubber layer has such relationship with respect to a corrugation valley depth A of the rubber layer as 0< or =B< or =0.7×A, and an opening angle ? of each of the corrugation valleys of the rubber layer satisfies ?< or =100°.

Abstract: A plastics material tube that is particularly resistant to fire, such that its wall is formed by a corrugated tube of flammable plastics material, by a smooth tube lining the outside of the corrugated tube and made of a plastics material that limits flame propagation, and by a fireproofing composition received between the two tubes.

Abstract: The present invention is directed towards an improved flexible hose (10). The hose (10) is comprised of at least a flexible material (28) and a reinforcing rod (12) positioned externally of the flexible material (28). Terminal ends (16, 18) define both the flexible material (28) and the reinforcing rod (12). At least one terminal end (16) of the reinforcing rod (12) is located short of the terminal ends (18) of the flexible material (28), so that the non-reinforced end of the flexible material (28) forms a soft cuff (20) adapted to be received by a hose fitting. Also disclosed is an improved method of manufacturing the flexible hose (10).

Abstract: A porous pipe having an excellent absorbing and draining function, a producing apparatus capable of producing a porous pipe at high speed and low cost, and a method of producing a porous pipe are provided. The porous pipe is a pipe formed by spirally winding a tape. The pipe is formed by a hole forming portion 13 for forming a recess or a notch or a hole in the tape 2 molded by a tape molding portion 11, and the hole forming portion 13 is located between the tape molding portion 11 and a pipe forming portion 12 so that the tape 2 is molded, holes 6 are formed, and a pipe 1 is formed continuously. The holes 6 are formed into a predetermined shape by elongating the hole 6 from a side of the pipe forming portion 12. In the pipe 1 formed thereby, a peripheral wall portion of the hole 6 is gradually thin-walled toward an outer peripheral face of the hole.

Abstract: A tendon receiving duct having a tubular body with a plurality of corrugations extending radially outwardly therefrom. Each of the corrugations is in spaced relationship to an adjacent corrugation. The tubular body has an interior passageway suitable for receiving single tendon therein. Each of the corrugations opens to the interior passageway. The tubular body has at least a first longitudinal channel extending between adjacent pairs of the corrugations on one side of the tubular body and a second longitudinal channel extending between adjacent pairs of the corrugations on another side of said tubular body.

Abstract: A system using pre-molded polyethylene galleries, utilized for septic or storm water applications, to facilitate rapid and even distribution of effluent and particles across the gallery installation when utilized as a septic system, or minimizes the resistance to storm water flow when used to dissipate storm water runoff.

Abstract: A corrugated pipe (2) has a plurality of corrugation structures (10, 12) positioned adjacent one another. The corrugation structures (10, 12) comprise an inner cylindrical wall (22), two annular wall portions (28, 32) that extend outwardly from the inner cylindrical wall (22), and a bowed annular wall portion (40) that is connected to the outer ends (36, 38) of the two annular wall portions (28, 32). The corrugation structure (10, 12) includes a centroid (48, 49) and at least a portion of the inner surface (50) of the bowed wall portion (40) has a radius R1 centered on the centroid (48, 49) and at least a portion of the outer surface (52) of the bowed wall portion (40) has a radius and at least R2 centered on the centroid (48, 49). The cavity (56) defined by the corrugation structure (10, 12) has an inner surface with an inner radius R2 centered on the centroid (48, 49).

Abstract: A vehicle air-conditioning duct 1 has an oblong cross-sectional configuration. The air-conditioning duct 1 has a top wall 16, a bottom wall 18 and side walls 12, 14 enclosing an interior space and at least one constriction 22, 24 formed by a projection protruding from at least one of the top wall 16 and the bottom wall 18 into the air-conditioning duct 1 so as to connect the top wall 16 with the bottom wall 18. The constriction 22, 24 continuously extends in an air flow direction so that cross-sectional areas of the constriction 22, 24 are constant in the air flow direction.

Abstract: 12A high temperature gas turbine component includes an inner core made of a monolithic ceramic material embedded within an outer CMC shell. The inner core may be formed with a through hole, blind hole, wear pads and the like. A method of making the bushing includes the steps of a) forming an inner core of silicon nitride or silicon carbide; and b) applying a ceramic matrix composite material over substantially all of the inner core.

Abstract: A tendon receiving duct having a tubular body with a plurality of corrugations extending radially outwardly therefrom. Each of the corrugations is in spaced relationship to an adjacent corrugation. The tubular body has an interior passageway suitable for receiving cables therein. Each of the corrugations opens to the interior passageway. The tubular body has a first longitudinal channel extending between adjacent pairs of the corrugations on a top side of the tubular body. The tubular body has a pair of longitudinal channels extending between adjacent pairs of the corrugations on a bottom side of said tubular body.

Abstract: A tendon-receiving duct having a tubular body with an interior passageway and a plurality of corrugations extending radially outwardly of the tubular body. Each of the plurality of corrugations has an interior opening to the interior passageway. The tubular body has longitudinal channels formed on the tubular body so as to establish fluid communication between adjacent pairs of the corrugations. The tubular body is formed of a polymeric material. The channels are formed on the outer wall of the tubular body and open to the interior passageway of the tubular body and extend for the length of the tubular body.

Abstract: A corrugated pipe is provided having a pipe structure of an inner wall having an interior surface and an exterior surface, and an outer wall having corrugations, each of the corrugations having an interior surface and an exterior surface, each corrugation having a crown. The pipe structure has a trough between each corrugation, and each trough has a center-point, with the distance between the center-points of adjacent troughs defining the pitch of the pipe. The pipe structure has at each crown a first distance extending in a straight line from the crown exterior surface to the interior surface of the inner wall, with the distance defining the pitch being a second distance, with the ratio of the first distance to the second distance being less than 0.8:1.0.

Abstract: A linearly self-actuated hose for use in transporting fluids (liquids, gases, solid particles, and combinations of these three). Hose (30b) has a biasing spring (36) extends along the full length, and can comprise single or multiple springs and/or multiple diameter spring coils. Spring (36) is covered with hose cover material (32) on the outside and hose cover material (34) on the inside to form a sealed hose and are bowed inward or outward radially between the individual spring coils depending on the intended use of hose (30b) to give the cover materials room to move out of the way when the hose retracts and the coils of spring (36) are forced close together. Hose (30b) is designed with a source end (26) and a output end (68). A pressure control mechanism is used on output end (68) to control the extending and retracting of hose (30b). The Linearly Retractable Hose is operated by changing internal pressure within the hose relative to the ambient pressure on the exterior of the hose.

Abstract: Systems for leaching liquid waste, particularly waste water. More particularly a cylindrical conduit or pipe for use in leaching systems. The pipe further has axially directed cuts or apertures in conduit/pipe valleys, has ridges, channels and grooves over which may be laid either single or multiple layers of fabric. The corrugated pipe may have slots or slits or V-grooves in and on the various portions of the pipe such as the outer-facing surface of the ridges, the end portion of the ridges, the side wall of the groove or through the bottom portion of the groove, i.e., the valleys. The cylindrical conduit disperses moisture away from the conduit through capillary action, wicking into a surrounding material. A perforated cylindrical conduit is one method permitting wicking. The surrounding material provides capillary action to transmit moisture away from the cylinder or conduit. These surrounding materials include sand, gravel, plastic fibers, wood products, slag, and ash.

Abstract: The invention relates to a protective corrugated plastic tube or pipe, a corrugated piping, wherein according to the invention at least some of the flanks of corrugations of the tube or pipe have extensions (16), which go from one corrugation (11a) towards a neighboring corrugation (11b) and extend in the axial direction of the protective corrugated plastic pipe.

Abstract: A tendon-receiving duct having a tubular body with an interior passageway and a plurality of corrugations extending radially outwardly of the tubular body. Each of the plurality of corrugations has an interior opening to the interior passageway. The tubular body has longitudinal channels formed on the tubular body so as to establish fluid communication between adjacent pairs of the corrugations. The tubular body is formed of a polymeric material. The channels are formed on the outer wall of the tubular body and open to the interior passageway of the tubular body and extend for the length of the tubular body.

Abstract: The present invention provides a method and device for conveniently setting the volume of a variable-length tubing loop used in a re-breathing circuit to various selected predetermined values. The device includes a card of an inelastic, disposable material which is attachable to a portion of the tubing loop or adjacent structure and which has marked on it several positions to which the tubing loop can be extended to set the volume of the loop at selected predetermined values. The card is preferably formed of a substantially rigid material which may be configured to fold around the tubing loop and adjacent structures to provide support and protection during shipping and handling of the device. The card may include instructions for use of the tubing loop printed on an outer surface thereof. Some or all of the card may be detachable from the tubing loop so that once the desired tubing volume is set, all or a portion of the card may be removed and disposed of.

Abstract: A conduit to house electrical wires is provided between two electrical service boxes. The conduit includes a length of continuously-threaded Schedule 80 PVC tubing which has a first end and a second end. The tubing is externally threaded from the first end to the second end. The conduit further includes a first lock nut and a first threaded bushing cooperatively threaded onto the conduit to secure the conduit to one of the electrical service boxes. The conduit can further include a second lock nut and a second threaded bushing cooperatively threaded on the conduit to secure the conduit to the other electrical service box. Alternatively, the tubing can include a collar to secure the conduit to the other electrical service box.

Abstract: A drainfield pipe having a rib radially extending from its wall is supported by a device which comprises opposing elongate anchor members having inside edges tapering away from a clamping end for sliding the drainfield pipe between the anchor members when the pipe is being positioned on the grade surface prior to supporting above the surface. The elongate anchor members penetrate a grade surface for holding the device upright while ta clamp is secured to the rib for holding the pipe above the grade surface. The clamp is attached to the anchor member upper portion and holds the rib between clamp jaws. In addition, the separation of the tapered edges proximate the clamp is such to position the edges between corrugation of the pipe. Supporting the pipe from the radially extending rib permits the pipe to be held at desired positions within an absorption area of a drainfield for introduction of aggregate into the absorption area without displacing interconnected pipe sections from their preset location.

Abstract: A tubular member useful as an inner liner for the working channel of a flexible endoscope has a distal portion which is specially treated to make it highly flexible and resistant to kinking or collapsing when it bends with the flexible section of the endoscope. The tubular member is also useful as a catheter device or as a component of a catheter device or catheter system. A multiplicity of external ridges on the distal portion of the tubular member reinforce the tubing wall and prevent kinking or buckling of the wall or collapsing of the inner lumen. The external ridges may be formed by convolutions of the tubing wall or by external threads which are formed on the exterior of the tubing wall within the flexible distal portion. An outer helical reinforcing coil may be added between the external ridges to further reinforce the flexible distal portion of the tubular member from kinking or collapsing.

Abstract: A metal layer uniform in thickness is formed by electroless plating on both of inner and outer surfaces of a corrugated tube to thereby produce a shield-plated corrugated tube which has a satisfactory flexibility as well as a superior electromagnetically shielding effect. Specifically, in the corrugated tube of resin, at least the size and shape of groove portions inside the tube for forming the convex-concave portions of the tube wall are set to satisfy the condition of 0.5<D/W<1.6 where D represents the depth of each groove portion in the radial direction of the tube and W represents the width of each groove portion in the axial direction of the tube. The metal layers are formed on the inner and outer surfaces of the corrugated tube by electroless plating.

Abstract: A recoverable article includes an inner resilient tubular member that is held in a laterally exapanded configuration by engagement with outer holdout strips, wherein the outer surface of the inner member is provided with a plurality of channels extending therealong and the holdout strips occupies the channels so as to provide said holdout engagement, wherein the holdout strips is arranged to be removed intact without any substantial change in the molecular structural properties of the holdout strips; thereby to allow recovery of the inner tubular member towards its unexpanded configuration.

Abstract: A stabilizer bar apparatus for use in a suspension of a motor vehicle includes a hollow tubular member (22) having first and second arms (24,26) disposed at opposite ends of a center section (28). The center section is adapted to be rotatably attached to a chassis and the first and second arms are adapted to attach to first and second wheel suspensions, respectively. A first radial protrusion (38) is circumferentially formed on an outer surface of the hollow tubular member and extends radially outward from the outer surface to a first predetermined height sufficient to retain the stabilizer bar under lateral loading. Additionally, a stress dispersing formation is (46) formed on an inner surface of the hollow tubular member opposite the first radial protrusion so as to disperse stress that would otherwise concentrate in the hollow tubular member adjacent to the first radial protrusion.

Abstract: There is disclosed a hollow reinforcing element for casting into composites, which in use defines passageways that may communicate to the exterior of the composite and that can serve as conduit arrays in structures formed from the composite. Benefits include superior strength to weight ratios, reduced thermal stresses, suppression of crack propagation, and improved corrosion protection. The hollow reinforcing elements may also be used to provide antennae, drain systems, leveling devices, containment structures and pneumatic levitation of vehicles.

Abstract: A recoverable article comprising an inner resilient tubular member that is held out in a laterally expanded configuration by engagement with outer holdout structure, wherein the outer surface of the inner member is provided with a plurality of cavities, and wherein the holdout structure occupies the cavities so as to provide the holdout engagement, wherein the holdout structure comprises at least one initiating portion that is structurally different from the remaining portion that engages at least one associated cavity, whereby release of the initiating portion from its cavity facilitates subsequent release of the remaining portion of the holdout structure.

Abstract: A flexible hose construction and method of making the same are provided, the flexible hose construction comprising an inner tube made of polymeric material, an outer sleeve of reinforcing material disposed in telescoping relation on the inner tube from one end thereof to the other end thereof, rib structure disposed between the sleeve of reinforcing material and the inner tube, the rib structure being disposed on the inner tube so as to define alternating coil structure of rib structure and coil structure of non-rib structure serially along the longitudinal axis of the inner tube in a like repeating pattern thereof, the coil structure of non-rib structure comprise coil structure of void space, and an outer tube of polymeric material disposed between the rib structure and the sleeve of reinforcing material so as to extend in a generally straight-line manner from coil structure of the rib structure to coil structure of the rib structure so as to tend to prevent the sleeve of reinforcing material from entering i

Abstract: A flexible duct and method for making the duct are disclosed. The duct includes an inner wall bonded to an outer wall, with a wire resilient helix and a scrim sandwiched therebetween. The scrim is in the form of a helical tape embedded between the outer wall and the inner wall, and preferably consists of a bonded yarn constructed in a layered or interwoven square or other uninterrupted geometrical pattern. The presence of the scrim provides the duct with high tensile strength and excellent tear resistance in all directions, especially in the helical direction. The method of manufacturing the duct includes the steps of helically forming the wire and scrim about the inner wall and bonding the outer wall to the inner wall to as to sandwich the helix and the scrim between the inner and outer walls.

Abstract: A first molded polymer field drain panel is made from a moldable polymer sheet material and has an elongated chamber with an arched-shape, a first end, a second end and transverse strengthening ribs protruding outwardly therebetween. The elongated chamber has a smaller transverse strengthening end rib, a transverse strengthening end rib and a smaller transverse strengthening intermediate rib. The smaller transverse strengthening end rib is molded at the first end shaped for being embracingly overlapped by a corresponding transverse strengthening end rib of a corresponding elongated chamber of a second molded polymer field drain panel. The transverse strengthening end rib is molded at the second end for overlapping a corresponding smaller transverse strengthening end rib of the corresponding elongated chamber of the second molded polymer field drain panel.

Abstract: An air intake duct comprising a main body with bellows which is made by blow molding soft resin and ring-like reinforcements made of hard resin. As the soft resin, a material which is capable of keeping a form of a tube by itself is adopted. The reinforcements are previously mounted on the internal surface of a blow molding die and unite with the bellows in the main body in blow molding.

Abstract: A flexible hose construction and method of making the same are provided, the flexible hose construction comprising an inner tube made of polymeric material, an outer sleeve of reinforcing material disposed in telescoping relation on the inner tube from one end thereof to the other end thereof, rib structure disposed between the sleeve of reinforcing material and the inner tube, the rib structure being disposed on the inner tube so as to define alternating coil structure of rib structure and coil structure of non-rib structure serially along the longitudinal axis of the inner tube in a like repeating pattern thereof, the coil structure of non-rib structure comprise coil structure of void space, and an outer tube of polymeric material disposed between the rib structure and the sleeve of reinforcing material so as to extend in a generally straight-line manner from coil structure of the rib structure to coil structure of the rib structure so as to tend to prevent the sleeve of reinforcing material from entering i

Abstract: The invention relates to a flexible tubular conduit having at least one tubular layer constituted by at least one molded strip of a cross section substantially in the form of an elongated S, wound helically and having a cross section formed of a first and of a second principal cylindrical coaxial spans joined together by an inclined central portion, each of the first and second principal cylindrical spans being united by a first convex radial portion to a first secondary cylindrical span and by a second convex radial portion to a second secondary span.

Abstract: A perforated metal center tube is provided for use within an oil, fuel, or hydraulic filter. The tube is fabricated from a perforated metallic sheet formed into a cylinder in which opposite edges thereof are mutually engaged with one another to form a longitudinal multi-layered lockseam. The lockseam is mechanically clinched to inhibit slippage of the mutually engaged edges without the need for welding, soldering or otherwise chemically or adhesively bonding the lockseam. A series of circumferential beads are provided at spaced locations along the length of the tube to provide structural reinforcement. Each bead is formed through lockseam without generating slippage or disengagement of the first and second edges relative to one another. The beads advantageously provide the tube with sufficient structural integrity to withstand typical filtration pressures, with a metallic sheet of relatively thin gauge.

Abstract: A flexible tube includes an inner tube and an outer tube structure mounted around the inner tube. The outer tube structure includes an outer protective tube wound around the inner tube and including a helical channel defined therein. An elastomeric tubular member is securely mounted in and extended along the helical channel. A rigid strip member is securely received in and extended along a length of the elastomeric tubular member. A number of elastomeric strings received in and extended along the length of the elastomeric tubular member.

Abstract: A flexible hose construction and method of making the same are provided, the flexible hose construction comprising an inner corrugated hose made of polymeric material and having a plurality of outwardly convex projections with recesses therebetween and extending from one end thereof to the other end thereof, an outer sleeve of reinforcing material disposed in telescoping relation on the inner hose, and a tube of polymeric material disposed between the sleeve of reinforcing material and the inner hose and extending in a generally straight-line manner from projection to projection of the inner hose so as to tend to prevent the sleeve of reinforcing material from entering into the recesses of the inner hose an amount that would tend to substantially reduce the flexibility characteristics of the inner hose.

Abstract: An abrasion resistant composite hose comprises (a) an outer layer composing a spiral tape of a soft synthetic resin, where adjacent side edges of the spiral tape join each other to form the outer layer, (b) a spiral reinforcement of a hard synthetic resin for retaining and reinforcing the outer layer, and (c) an inner layer comprising a spiral strip formed by a rubber, where adjacent side edges of the spiral strip join each other to form the inner layer, and the outer layer and inner layer join each other. In such a composite hose having this structure, at least a periphery of the strip except an exposed surface to an inner surface of the hose is covered with a covering element comprising a rubber adhesive to the soft synthetic resin constituting the outer layer, and the rubber strip is formed by a rubber having higher abrasion resistance than the covering element to obtain a composite hose having enhanced abrasion resistance.

Abstract: A flexible hose construction and method of making the same are provided, the flexible hose construction comprising an inner corrugated hose made of polymeric material and having a plurality of outwardly convex projections with recesses therebetween and extending from one end thereof to the other end thereof, an outer sleeve of reinforcing material disposed in telescoping relation on the inner hose, and a tube of polymeric material disposed between the sleeve of reinforcing material and the inner hose and extending in a generally straight-line manner from projection to projection of the inner hose so as to tend to prevent the sleeve of reinforcing material from entering into the recesses of the inner hose an amount that would tend to substantially reduce the flexibility characteristics of the inner hose.

Abstract: A linking device intended notably for the connection of rods made of a composite material based on polymerizable resin and reinforcing fibers includes a tubular sleeve tightly connected to one end of a rod by plastic deformation of the sleeve placed around said end. The device is formed by a process for fastening linking means on elongated elements made of a composite material.