Abstract: Durability of elastomeric bellows-type suspension and drivetrain components, particularly constant velocity joint boots, is improved by coating the elastomeric boot with a thin, flexible, and lubricious coating formed by curing the admixture of epoxy resins, curing agents, an unsaturated polymerizable monomer, a free radical polymerization and/or grafting initiator, and a non-fugitive solid lubricant. The coating strongly adheres to the elastomer and greatly increases the longevity under severe operating conditions.

Abstract: An enveloping corrugated pipe (1) comprises corrugated sections (3) which are disposed one after the other in the direction of the axis (2), extending over more than half its periphery. Further, it comprises corrugated partial sections (3", 3'") which are disposed one within the other, which are turned towards each other and adjoin the ends of the corrugated section (3).

Abstract: An underdrain pipe has a pipe wall in which wall portions rectangular in section and wall portions circular in section are disposed alternately in a longitudinal direction of the pipe, in which a number of water collecting small holes are formed in portions of the pipe wall, and in which the whole of the pipe wall is formed of material of synthetic resin or rubber.

Abstract: A tube element, especially for the exhaust systems and exhaust gas recirculation systems of combustion engines in vehicles. The element has a single- or multi-ply tube element made of metal which is provided with cylindrical end fittings and at least two annularly corrugated bellows and a connecting pipe forming a single element, with the pipe corresponding with the bellows in diameter as well as in wall thickness, and with the inside diameter of the connecting pipe corresponding substantially with the free inside diameter of the adjacent bellows. The element has a concentric reinforcing pipe at an external radial distance to the connecting pipe, with the ends of the reinforcing pipe, whose inside diameter corresponds with the outside diameter of the bellows, being connected with the radial outward crests of the first corrugations of the bellows following the connecting pipe.

Abstract: A tube element especially for exhaust systems and exhaust recirculation systems of combustion engines in vehicles which includes at least one helically or annularly corrugated bellows provided with cylindrical end fittings on each end of the bellows; a flexible hose made of metal and situated on an interior surface of the bellows; and a braiding hose made of metal wire which coaxially encloses an exterior surface of the bellows. The braiding hose being placed on the cylindrical end fittings together with the flexible hose so that the flexible hose and the braiding hose are connected firmly and at least indirectly. The braiding hose is installed in a state of pre-setting so that the braiding hose has a reduced radial cross-section which in frictional contact with the exterior surface of the bellows.

Abstract: A bellows is disclosed which includes a tube having plurality of raised circumferential convolutes formed in the surface of the tube, wherein at least one of the convolutes being formed so that a portion of the convolute is substantially even with the surface of the tube.

Abstract: It is of the type comprising a corrugated and sealed internal metal tube (1), a pressure vault (2) wound at a short pitch and having an internal surface which faces the corrugations of the corrugated internal tube, an intermediate sheath, at least two groups of inner and outer armoring layers (3, 5), the armoring layers being wound at a lay angle of less than 55.degree., and an outer-sheath (6), and it is characterized in that the intermediate sheath (4) is sealed and is arranged between the two groups of armoring layers (3, 5), the said inner group of armoring layers (3) bearing directly on the pressure vault (2).

Abstract: In an automotive vehicle, a wire harness includes a wire bundle which is housed in and protected by a corrugated tube. The tube has two end regions circular in cross-section and a central region elliptical or race-track shaped in cross-section. Between the end regions and central region are transition regions of varying cross-sectional shape. When installed in a vehicle, the central region of the wire harness tube is installed along the vehicle floor such that the projection perpendicular to the floor by the central region of the tube is reduced. This results in the wire harness requiring less space in the vehicle. The tube includes a resilient expansion slit which allows a wire bundle to be inserted in or removed from the tube.

Abstract: A multi-layered metallic pipe having resistances to the chipping of pebbles and splashing of muddy water while driving a vehicle and excellent corrosion resistances. The multi-layered metallic pipe is piped without scraping and does not need an insulator. The multi-layered metallic pipe includes a metallic pipe having a relatively small plated diameter with a film made of zinc, aluminum or a zinc/aluminum based alloy on the outer circumference of the metallic pipe. A first layer of a polyamide resin, a polyviny fluoride, or a polyvinylidene fluoride having a film thickness of 20 to 50 microns is applied to the plated film. A second layer made of an extrudible resin having a film thickness of 100 microns to 1.0 millimeter and a chipping resistance is coated over the first layer along an entire length of the first layer. The second layer is formed to have stepped portions of different thickness.

Abstract: A repositionable downspout extension that is attached to a downspout to direct rainwater away from a building. The extension is a generally tubular body with first and second ends. The extension comprises a pair of selectively removable adapter portions at each end that allow the extension to be connected to a downspout. An interlockable collar portion is at each end of the extension and interior to the adapter portions. The interlockable collar portions allow a number of the extensions to be connected together to form a downspout extension assembly after the adapter portions are removed. The extension further comprises an adjustable portion between the two collar portions. The adjustable portion comprises collapsible corrugations so that the extension can be bent into a number of positions and hold its position.

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 method of forming a flexible spiral-wound tube includes the steps of spiral wrapping at least two webs of material in an overlapping relationship about a mandrel to form a multi-ply tube and advancing the tube along the mandrel and off a reduced diameter portion of the mandrel at a forward end of the mandrel. Advancement of the tube along the mandrel includes rotating the tube as the tube longitudinally moves such that the tube advances in a spiral manner. The method further includes the step of retarding movement of the tube along the reduced diameter portion of the mandrel by providing frictional resistance between the tube and the mandrel to form folds or pleats in the tube so that the tube becomes extremely flexible. The flexible spiral-wound tube has a uniform pattern of generally diamond-shaped folds therein.

Abstract: A pipe having a substantially square cross section portion and a substantially circular cross section portion are disposed alternately in the axial direction of the pipe. The thickness of the circular portion is set uneven in the circumferential direction. In particular, the thickness of the portions of the circular portion that correspond to the corner portions of the square portion is set larger than the thickness of the portions that correspond to the central portions of the respective sides of the square portions. Accordingly, a pipe having corner portions with increased pressure deformation resistance is obtained. Also, the pipe is capable of being manufactured in a high efficiency manner.

Abstract: The flexible hose comprises a bellows hose wall 1 composed of an inner wall 2 and an outer wall 3 each made of a soft resin and a spiral hard reinforcement 4 interposed therebetween. As the hose contracts, a spiral groove 7 is formed inside of the hose. The inner wall 2 is not partially bonded or fused with the outer wall 3 and the hard spiral reinforcement 4 to form unbonded sites or fragments 8. As the hose contracts, the unbonded fragments 8 are separated from the outer wall 3 and the spiral hard enforcement 4 and move to the inward direction of the hose, and close the spiral groove 7. Therefore, even a fluid flows to any longitudinal direction, the flexible hose reduces a flow resistance.

Abstract: The invention relates to a corrugated pipe of thermoplastic polymer material for use as fluid line with at least one polymer layer, comprising closed geometric outer contours which are spaced at an interval from each other in the axial direction of the pipe and which define a corrugation on the pipe jacket in at least one radial angular sector in axial, longitudinal direction one behind the other. The closed geometric outer contours are designed in such a manner that two jacket lines of the pipe jacket surface, which lines are approximately opposite one another, are free of corrugations and that these jacket lines extend in the longitudinal direction of the pipe (FIGS. 1b-1d).

Abstract: End fittings for metal hose assemblies are disclosed, plus a method for their attachment. In a preferred embodiment, the hose assembly comprises: a standard flexible metal hose with a convoluted metal innercore; two cold-worked tubular end fittings with straight end portions that are inserted into opposite ends of the innercore, whereby stop beads on the tube limit the amounts of insertion and position the fittings; annular welds between crowns of the beads and adjacent flattened convolutions of the innercore that fix the fittings to the hose; and a pair of crimped locking collars or ferrules (carried on the fittings) that are mounted on the hose ends to protect the welds and hold the fittings in place. No prior machining of the inserted end portions of the fittings is needed to secure a stable weld.

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 hose for transporting a fluid through a controlled bend and method of using same. In one application, the hose is adapted for incorporation into an automotive vehicle and has a generally straight portion and a bent portion. The bent portion is capable of maintaining a 90 degree bend without causing an "S" shape and provides a visually pleasing appearance.

Abstract: A flexible and relatively low cost cryogenic conduit is described. The flexible cryogenic conduit of the present invention comprises a first inner corrugated tube with single braided serving, a second outer corrugated tube with single braided serving concentric with the inner corrugated tube, and arranged outwardly about the periphery of the inner corrugated tube and between the inner and outer corrugated tubes: a superinsulation layer; a one half lap layer of polyester ribbon; a one half lap layer of copper ribbon; a spirally wound refrigeration tube; a second one half lap layer of copper ribbon; a second one half lap layer of polyester ribbon; a second superinsulation layer; a third one half lap layer of polyester ribbon; and a spirally wound stretchable and compressible filament.

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: An apparatus and method of producing a multiple compartment corrugated hose with at least one inner corrugated partition. The corrugation of the inner partition is achieved by maintaining a predetermined ratio between the peripheral wall and the inner partition wall. The hose is produced using either a continuous blow molding with internal pressure and/or vacuum assist process where the inner partition is allowed to shrink and relax into a corrugated pattern. Such an hose is flexible in all directions and available for many applications.

Abstract: A composite pipe comprises and internal pipe and a corrugated external pipe and a socket formed in one piece with the internal pipe and the external pipe. This socket has a connecting section of substantially cylindrical shape and at least one reinforcing rib formed on the outside of the connecting section, a.ltoreq.2b applying to the length b of the reinforcing rib in the direction of the central longitudinal axis in relation to its thickness a radial to the central longitudinal axis 10.

Abstract: A packless swivel joint capable of rotation without the necessity for a mechanical drive includes a hollow tubular member provided with helical corrugations of tight pitch and a corrugation pitch to corrugation with ratio of between two to one to three to one which unwinds to the application of only internal pressure. A limit stop may be provided to limit the amount of unwinding. Annular-shaped bellows of a circular cross section can be utilized to absorb lengthening of the swivel joint in applications where lengthening is to be prevented. In one preferred embodiment, the helical corrugation is preferably continuous.

Abstract: A hose 10 of the invention includes an outer hose member 12 composed of a rubber and an inner hose member 14 composed of a resin. A pair of projection ring elements 26 formed on opposite ends of the inner hose member 14 are received in a pair of inner circumferential grooves 24 formed in thick-walled tube elements 18 of the outer hose member 12. The projection ring elements extend the inner circumferential grooves 24 with such dilatation and deformation of the concavity of the inner circumferential grooves 24 enabling the thick-walled tube elements 18 to generate forces acting along the concavity of the inner circumferential grooves 24. Such forces are applied as pressing forces against the projection ring elements 26. The thick wall of the thick-walled tube elements 18 enables the pressing forces to be maintained while the projection ring elements 26 are retained in the inner circumferential grooves 24.

Abstract: The invention relates to a method for manufacturing a multi-layer corrugated pipe and to a corrugated pipe manufactured by the method and comprising an inner tube (2), a corrugated outer tube (5) and a plastic layer therebetween. Separate layers (3,6) of plastic are formed on the outer surface of the inner tube (2) and the inner surface of the outer tube (5), said separate layers of plastic being affixed to one another at least at the web portions (5a) of the corrugations of the outer tube (5) when the inner tube and outer tube are connected.

Abstract: In a profiled tube, corrugated hose or the like elongate portion of flexible material with mutually parallel peripheral grooves (20) and ridge rings (12) laterally delimiting same the peripheral grooves (20) are radially prolonged in the groove center (N) extending transversely to the longitudinal axis (A) of the elongate portion (10), by at least one recess (20.sub.a), forming a shoulder step (18), wherein the width (f) of a land ring (16) delimiting the recess towards the longitudinal axis is less than the groove width (i). The depth (q) of the groove recess (20.sub.a) is to approximately correspond to half the groove width (i). In addition there can be provided at least two groove recesses (20.sub.a) which are disposed on a common radial axis (M) and which each form a respective shoulder step (18).

Abstract: A synthetic resin hose includes a corrugated tube wall and an electrically conductive wire disposed substantially straight along the axial direction of the tube wall and configured so that the whole length of the electrically conductive wire on the inner circumferential surface side thereof is covered with the tube wall and the outer circumferential side thereof is enclosedly covered with only top portions of the tube wall.

Abstract: A flexible pipe for subsea installation has a fluid impervious tube surrounded by a structure pipe. The structure pipe is a cylindrical monolithic member. It has at least two rows of slots extending along the length of the wall. The slots are evenly spaced apart, parallel and located on a helix. Each of the slots are in a row, which is also located on a helix, but extending in a different direction from the slot helix. Solid bands extend between the rows of slots. Arc members are located between each of the slots, the arc members joining the bands. The structure pipe surrounds a fluid impervious tube which is corrugated and metallic.

Abstract: A one piece integrally formed liquid tight connection or "whip" assembly for electrically interconnecting electrical appliances, such as air conditioning units, hot tubs, swimming pools and outdoor lighting fixtures, to one another and/or to a power source junction box or control box. The connection assembly includes a flexible tubular conduit, preferably constructed from a composite of full rigid PVC and flexible plasticized PVC, having first and second end portions and an outer surface with a plurality of surface irregularities. A pair of end fittings are integrally attached to the first and second end portions of the tubular conduit, respectively, using either a solvent welding or temperature welding technique. When using the solvent technique, the plurality of surface irregularities operate to hold additional localized amounts of solvent which further reacts with the plastic in the end fittings and conduit to yield a superior weld.

Abstract: To reduce turbulence in a fluid flow, especially exhaust gas from automotive internal combustion engines, within a flexible conduit element, a bellows (1, 40, 42) has an internal hose (6) located therein made of woven or knit metal wire. The hose is engaged against the internal corrugations of the bellows (1) and/or a connecting pipe (41) between adjacent bellows (40, 42) to guide the exhaust gases, and dampen vibrations and oscillations, which may become resonant with the corrugations of the bellows, and thereby decrease noise level during the gas flow. The hose (6) is engaged against the inner corrugations (3) of the bellows by, for example, first axially compressing the hose to result in permanent deformation of the wires to a diameter larger than the clear inner diameter of the bellows; by then forcing the hose into the bellows, the hose will resiliently compress and engage against the bellows.

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 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: Components of the fuel delivery device can be connected with each other or with the internal combustion engine (14) by the fuel line (16). The fuel line (16) is embodied as a pipe and is fastened on a connector (20). The pipe (16) has a contact bead (36) on its exterior circumference near the connector (20). By severing the pipe (16), it is possible to create a new connector by its rest (16a), which has the contact bead (36) and remains on the connector (20), on which it is possible to again fasten a new fuel line, for example in the form of a flexible hose. The preparation of the pipe (16) with the contact bead (36) makes the easy removal of the fuel line or of the components connected therewith possible.

Abstract: A method for coupling ventilator breathing circuit tubing to a respiratory ventilator using a compression coupler. The tubing has a corrugated or ribbed portion and a non-corrugated cuff. The cuff is inserted into the coupler, which is in turn coupled to the ventilator. The coupler has inner and outer tubular members that compressively engage the cuff between them when they are rotated with respect to one another.

Abstract: A flexible conduit for coolant having a high bursting pressure above 8 bar at 100.degree. C. and high hydrolysis resistance comprising an outer layer of a material selected from the group consisting of homopolyamides, copolyamides and mixtures thereof with an excess of amino terminal groups, a non-swelling inner layer made of a material selected from the group consisting of non-halogenated copolyolefins, non-halogenated homopolyolefins and mixtures thereof and a middle layer compatible with the inner and outer layers made of a homopolyolefin or a copolyolefin with grafted functional groups, the layers being coextruded and corrugated during coextrusion.

Abstract: The disclosure relates to a composite tubing comprising a convoluted tubular core having coextruded inner and outer plastics layers providing a composite tube having a smooth inner bore and a smooth outer surface.

Abstract: A tubular hollow molded body is formed with a resin having a bending resistance; the hollow molded body is inserted into a mold; a resin with less stress relaxation is injected into both ends of the hollow molded body through a connecting path to mold a bellows intermediate; the resin moved into the connecting path of the bellows intermediate is removed; and a cut is put in the hollow molded body to mold a bellows portion.

Abstract: The external shape of a pipe wall is formed of sectionally rectangular wall portions and sectionally circular wall portions which are disposed alternately in an axial direction of the pipe, and the internal shape of the pipe wall is formed into a substantially linear circular-cylindrical surface. The whole of the pipe wall is formed of a material of synthetic resin or rubber.

Abstract: In a wire harness protector, a pipe wall has a structure in which wall portions rectangular in section and wall portions circular in section are disposed alternately in the longitudinal direction, a cutting line used for insertion of the wire harness and passing substantially centers of flat sides of the sectionally rectangular wall portions is formed over the entire length of the pipe wall, and the whole of pipe wall is formed of synthetic resin or rubber.

Abstract: A hose includes an outer hose member, and an inner hose member. The outer hose member includes a first bellows-like tubular portion at least in the intermediate area in the axial direction. The inner hose member is disposed substantially coaxially in the outer hose member, includes a second bellows-like tubular portions in the area corresponding to the first bellows-like tubular portion of the outer hose member, and adapted to form a tubular air layer between the second bellows-like tubular portion and the first bellows-like tubular portion. Because of the outer hose member and the inner hose member, the hose exhibits a high flexibility, a reliable barrier ability against gasoline fuels or the like, and an improved adiabatic ability and anti-flammability for the inner hose member.

Abstract: Convoluted tubing for automotive wiring harnesses and other elongated substrates is provided with sound dampening qualities by filling the valleys between convolutions with a flexible, resilient foamed composition, such as silicone rubber, and foaming the composition to cause expansion of the foam so that ribs of foam project radially from the valleys. In a preferred embodiment, spaced apertures are formed in the valleys to allow the expanding foam to form radially inwardly projecting fingers which contact the wiring harness and act to dampen vibrations. The corrugated tubing may be axially slit and the slit allowed to be filled with the foamed composition which, when foamed, eliminates noises caused by movement of the edge surfaces of the slit when torsional forces are applied to opposite ends of the tube.

Abstract: Flexible convoluted conduit covered with braid made by cold forming the braid to an end of the conduit. Cold forming can involve magneforming. Resulting conduit is not brazed, welded, or annealed, thereby facilitating construction of convoluted conduits with higher working pressures and/or less braid material.

Abstract: A assembled wrist for use on an industrial robot having a final-axis arm (2) includes passage (45) formed by first, second and third spaces arranged in series. The passage extends from a third driver tube (9) in the final-axis arm (2) to one end surface of a tool support portion (5). A protective member (50) has ends fixed and sealed to the third driver tube (9) and the tool support portion (5) respectively so that the protective member (50) may be disposed in the passage (45). The protective member has flexible components (62) at least near the fixed and sealed ends so that the flexible component (62) deforms according to the rotations of the third driver tube (9) and the tool support portion (5).

Abstract: Flexible convoluted conduit covered with braid made by cold forming the braid to an end of the conduit. Cold forming can involve magneforming. Resulting conduit is not brazed, welded, or annealed, thereby facilitating construction of convoluted conduits with higher working pressures and/or less braid material.

Abstract: An article of manufacture which has a high resistance to chemicals, solvents, and heat formed from a blend of (A) a polyamide, such as polycaprolactam; (B) a functionalized polyethylene, such as low density polyethylene; and (C) an unfunctionalized low density polyethylene. The blend has a melt viscosity suitable for extrusion into convoluted tubing, nonconvoluted tubing, sheets, films, and the like.

Abstract: Convoluted conduit covered with braid made by cold forming the braid to an end conduit or an end section of the convoluted conduit. Cold forming can involve magneforming. Resulting conduit need not be brazed, welded, or annealed, thereby facilitating construction of convoluted conduits with higher working pressures and/or less braid material.

Abstract: A double wall thermoplastic pipe has a flat inner wall, a corrugated outer wall and a skin of reduced thickness relative to and between the walls. The skin is secured continuously along one of the walls and is secured to the other of the walls at spaced apart locations along the pipe where the pipe walls are adhered to one another by the skin.

Abstract: A bellows includes a flexible tube with a pleated wall which has valleys and peaks extending in parallel planes across an axis of the flexible tube. At least one of the valleys and at least one of the peaks extend in a respective one of the planes. Each of the valleys and peaks in a corresponding one of the planes is staggered in an axial direction with the other one of the peaks and valleys in an adjacent one of the planes. The pleated wall further has ridges. Each of the ridges is in the form of a segment of a helix and interconnects a corresponding pair of the staggered peaks.

Abstract: A synthetic resin corrugated pipe includes a pipe wall having an annularly- or helically-shaped convex-concave surface. The convex-concave surface has a plurality of convex portions having a quadrangular cross-sectional shape and a plurality of concave portions having a circular cross-sectional shape.

Abstract: Polymer tubing, made of at least one polymer layer, has a partial section of the tubing which is corrugated and wherein the rings formed by the corrugations extend around the tube axis, with the corrugations being embodied at least partially in an oval shape or in the shape of an ellipse or in the form of a circle, which is flattened on one side.