Abstract: A reinforcement structure of pipe comprises a hard resin to be inserted into a pipe portion to be reinforced and protruded members protruded from the hard resin and having a slightly larger diameter than an inside diameter of the pipe portion, the protruded members being formed of a foaming resin material and the protruded members pressed into the pipe portion being foamed and expanded to seal between an internal surface of said pipe and an external surface of at least one of said core member.

Abstract: A reinforcement structure of pipe comprises a hard resin to be inserted into a pipe portion to be reinforced and protruded members protruded from the hard resin and having a slightly larger diameter than an inside diameter of the pipe portion, the protruded members being formed of a foaming resin material and the protruded members pressed into the pipe portion being foamed and expanded to seal between an internal surface of said pipe and an external surface of at least one of said core member.

Abstract: The invention provides methods of manufacturing hardened stainless steel tubing, pipe, shafts and assemblies. The present inventions also provides stainless steel shafts, tubing, pipe or assemblies reinforced with stainless steel members brazed and hardened within the shafts, tubing, pipe or assemblies.

Abstract: The invention relates to a roll-back tube construction, preferably for use with a flexible endoscope shaft, with a silicone roll-back tube consisting of an inner tube section which at least at one turn-back area is turned back to form an outer tube section and is provided with a reinforcement. The reinforcement preferably consists of a nylon filament winding with a pitch of 0.2 to 2 mm about a silicone tube, which reinforcement is in turn surrounded by a silicone covering. The roll-back tube construction is designed in accordance with the type of tube which can be rolled back at both ends, where front and rear outer tube sections are connected at one end by a tube-guiding sleeve arranged between them, through which an inner tube section extends. The tube-guiding sleeve is used for mounting a roll-back tube drive.

Abstract: A steel pipe, includes an outer corrosive-preventive protective sheath, which has a surface layer of plastic material, and a crack stopper zone extending over a section of the pipe. The crack stopper zone includes a bandage which is wrapped around the pipe section and made of high-strength fiber material imbedded in a compacted matrix of thermoplastic and thermosetting plastic. The bandage is comprised of a plurality of wound layers joined to one another via the matrix by welding or gluing.

Abstract: A method and apparatus for providing metal or non-metal vessels, including straight and curved pipes and various pipe connections, such as T's, elbows, swages, etc., and pressure containing vessels such as tanks, with an external composite lining of a webbing of biaxial or triaxial weave preferably composed of fiberglass which is pre-impregnated with a high temperature heat curable polymer composition capable of being heat cured at a temperature range of from about 275° F. to about 375° F. The vessel is prepared for bonding by abrasive cleaning and by solvent cleaning. Metal imperfections are then filled with an epoxy. A small amount a quick setting epoxy is employed to attach one end of the web to the external surface of the vessel in oriented position for wrapping of the web in intimate surface-to-surface contact with the vessel. During wrapping only enough tension is applied to the pre-impregnated webbing to eliminate any wrinkles.

Abstract: A method for fabricating the composite plastic pipe with netted wire skeleton is disclosed, which comprises steps: forming cylindrical netted wire skeleton by winding the two groups of left and right coiled steel wire each other inside and outside alternatively; filling melted plastic on both sides of the cylindrical netted wire skeleton to make the melted plastic uniformly filled in skeleton as well as both sides thereof; cooling the skeleton-plastic composite in a fixed shape to obtain desire composite plastic pipe with netted wire skeleton. Since no welding is required, the process is simplified, resulting in simple manufacturing apparatus and reduction of cost.

Abstract: The present invention relates to a hose construction containing a fluoroplastic barrier and a hydrogenated acrylonitrile-butadiene rubber layer. The hose comprises (1) a rubber layer comprising (a) hydrogenated acrylonitrile-butadiene rubber; (b) from 2 to 15 phr of an organophosphonium salt; (c) from 5 to 30 phr of trioctyl trimellitate; and (d) from 5 to 30 phr of a dialkyl diether glutarate; (2) a barrier layer comprised of a terpolymer derived from tetrafluoroethylene, hexafluoropropylene and vinylidene fluoride, wherein the barrier layer is directly adhered to the rubber layer.

Abstract: A clip-on stirrup mat for a concrete reinforcement cage comprises at least one and preferably a plurality of resilient clips attached to the stirrup mat and extending outwardly therefrom in the direction of application of a mat to a cage. The clip has a relatively narrow outer end that fits between adjacent wires in the cage and has inwardly extending, diverging first and second legs that lead to more widely spaced distal ends that form an inner end of the clip. The first leg is attached to the mat adjacent a distal end of the leg, and the second leg is resiliently deflectable toward the first leg. The clip and legs are shaped and positioned on the mat such that, as the mat is attached to the cage, the outer end of the clip fits through adjacent wires in the cage and the second leg engages and is deflected toward the first leg by one of the adjacent cage wires. The second leg includes a gripping surface thereon, which may be convolutions, that engages a wire on the cage as the mat is installed on the cage.

Abstract: A pipe for conveying solids provided at least at one end thereof with a circumferential radially extending coupling flange and an axially extending annular portion connected to the coupling flange. An annular insert of a material having a greater resistance to wear as compared to the material of the pipe is arranged in a chamber formed by the coupling flange and the annular portion. The coupling flange and the annular portion are formed by a chipless deformation from a tubular steel cylinder.

Abstract: A reinforced pipe and a method for constructing same wherein the reinforced pipe is comprised of an outer pipe concentrically positioned over an inner pipe. A honeycomb, reinforcing material which is comprised of rows of cells is positioned between the pipes with the longitudinal axis of each cell being aligned with a radius of the inner pipe. The outer pipe may be heat shrunk onto the honeycomb material or it may be split and expanded before positioning over the honeycomb material. Both the honeycomb material and the outer pipe are positioned along only a portion of the length of the inner pipe so that each end of the inner pipe is exposed to facilitate the joining of two adjacent lengths of reinforced pipe.

Abstract: A tie rod for reinforcing heating, ventilating and air conditioning (HVAC) ducts against excessive wall flexure in response to positive and/or negative static or dynamic pressure differentials between the interior and exterior of the duct includes a threaded steel rod having a pair of abutment structures irrotatably fastened to longitudinally opposed end portions of the rod. Each abutment structure has a central coaxial bore which receives the rod, and includes a tubular portion terminated at an outer longitudinal end thereof by a transversely disposed, radially outwardly protruding annular flange. The bore wall of the abutment structure's tubular portion flares in an arcuate curve radially and axially outwardly to join the outer transverse wall surface of the flange, forming a tapered annular cavity between the bore wall and the end portion of the threaded rod protruding out from the abutment structures.

Abstract: A duct comprising a sealed inner tube (1) and a reinforcement (2) made of at least one strip wound in a spiral around a central axis (11) of the inner tube. The strip (10) is flat and includes at least one layer of longitudinal filamentary rovings (6) and means for assembling said filamentary rovings comprising a loosely woven weft yarn (7) and a bonding material (8) provided at least at the interface between said filamentary rovings and said weft yarn. The assembly means hold the longitudinal rovings together along the full length thereof and impart a compactness of at least 39% to said strip.

Abstract: An improved vacuum hose includes an axial vacuum conduit having outer linear buttresses integral with the conduit and arranged radially around the conduit; the buttresses are strengthened by substantially orthogonal ribs. Buttresses and ribs are imbedded in a matrix of flexible plastic which provides support and increases the collapse resistance of the conduit; the whole assembly is covered by a tough casing which may be a separate component or a treated surface of the matrix material.

Abstract: A catheter has a support segment which includes a plurality of support struts. Each of the struts has first and second ends longitudinally spaced apart along a longitudinal axis of the segment. The struts curve at least partially around the axis from the first ends to the second ends. The support struts include a first set and a second set. The struts of the first set extend around the axis in a clockwise direction. The struts of the second set extend around the axis in a counter-clockwise direction.

Abstract: A hose for hose pumps is provided. The hose has, in the unloaded state, an essentially elliptical cross-sectional profile with a long semiaxes ending in a point, with an outer width B1 of about 0.8 to 10 mm, a maximum outer height H1 of about 0.4 to 5 mm, the numerical ratio of the outer width B1 to the maximum outer height H1 being about 2:1, and with a wall thickness of about 0.3 to 2 mm, wherein the hose essentially consists of one of the elastic materials rubber, silicone rubber, nylon, polyethylene or polyamide.

Abstract: A garden hose assembly is provided and comprises holding means comprising at least a portion of such hose assembly with the holding means and portion being adapted to be coiled around an associated support for holding the portion at a desired position to enable use of the hose assembly in a hands-free manner.

Abstract: A structural member includes a tube member having first and second opposite ends. An elongated portion between the opposite ends terminates at a flattened, tapered portion adjacent each end, and a crimped portion at each end. At least one reinforcing member is provided adjacent each end. Each reinforcing member is attached to the tube adjacent the flattened, tapered portion, and extends transversely through the tube member.

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 fiber-reinforced article comprises a tubular body and a plurality of fiber braids for reinforcing the tubular body. The fiber braids have a first section parallel to the axis of the tubular body, and a second section forming an angle with the axis of the tubular body. The second sections of the fiber braids form a network capable of enhancing the resistance of the article to flexure and torsion.

Abstract: The present invention relates to a member for an automobile front side member, in which the member has a simple sectional shape, is lightweight, is provided with a flat portion for mounting other parts on the member, and is excellent in axially compressive properties in the lengthwise direction against an impact. The member for the front side member according to the present invention comprises an Al alloy extruded square pipe, wherein the inside wall of each corner portion of the square pipe is made thicker than the wall of each side portion of the square pipe. The square pipe of the present invention includes a pipe square or rectangular in sectional shape, or a pipe provided with a flange on the square or rectangular pipe and so on.

Abstract: A DIY flexible pipe with rigidity comprising a screw typed inner spring sheet, a screw typed outer spring member, a plurality of spring strips, a soft sleeve and many smaller sleeves; wherein, each layer (thread) of the inner spring sheet is provided with many engaging holes for insertion therein the spring strips having engaging teeth, the spring strips string multiple layers of the inner spring sheet, each spring strip in the layers of the inner spring sheet can also be strung up with many smaller sleeves, the inner spring sheet is slipped over with the outer spring member, and the soft sleeve is slipped over the outer spring member; thereby, a user can press to and fro on the pipe gradually as he likes to make a three-dimensional pipe having the curvatures desired, the spring strips, outer spring member and inner spring sheet in the areas bended are engaged with one another to construct a state which is provided with rigidity for bearing loading, or are mutually released to render the pipe to obtain flexib

Abstract: A flexible hose which is formed by attaching a resin reinforcing coil member to a cylindrical body, the cylindrical body being composed of a nonwoven fabric layer which is formed by winding a nonwoven fabric tape spirally and connecting adjacent side end portions and an air-cut layer which forms on at least one side of the nonwoven layer. The nonwoven fabric tape and the reinforcing coil member are formed of heat-fusible resin materials, and the reinforcing coil member is fused with the nonwoven fabric layer in a body.

Abstract: An FRP curved pipe, particularly suitable for an FRP racket, good in resin flowability and deaeration at the time of molding, less in surface defects and excellent in strength can be obtained by a structure comprising an inner layer including a reinforcing fiber and an outer layer including a non-woven fabric having a single fiber diameter of not greater than 20 .mu.m and a weight per unit area of not greater than 100 g/m.sup.2.

Abstract: A continuous length of pre-assembled, metal-to-fabric-to-metal stock material for fabricating custom-made, flexible duct connectors of any diameter which incorporate a structural means for minimizing the risk of inward collapse of a fabric strip when the fabric strip is subjected to considerable negative air pressure due to installation between a duct and an inlet of an axial flow fan or blower.

Abstract: This is a braided tubular structure made up of a plurality of interwoven fibrous members, preferably ribbons, a majority of which comprise one or more superelastic and (at least) ternary alloys of nickel, titanium, and at least about 1.5% (wt) of one or more alloying members selected from the group consisting of vanadium, chromium, manganese, iron, and cobalt.

Abstract: A self locking stirrup mat for providing supplemental support for wire cage concrete reinforcement comprises a stirrup mat formed of a grid of interconnected wires preferably with manually formable tie wires, stirrup elements projecting from the grid, and a self-locking attachment mechanism for attaching the stirrup mat to a wire cage. The self-locking attachment mechanism comprises a plurality of clips fixed at spaced locations on the grid. The clips are shaped and positioned to receive cage wires therein through inlets that are engaged by moving the stirrup mat on the surface of the cage. The clips have one-way inlets that resist removal of the cage wires from the inlets with considerably more force than needed to insert the cage wire into the inlets. In one aspect of the invention, the clips are formed of flat elongated resilient steel loops welded to the tie wires at inclined angles.

Abstract: A garden hose assembly is provided and comprises holding means comprising at least a portion of such hose assembly with the holding means and portion being adapted to be coiled around an associated support for holding the portion at a desired position to enable use of the hose assembly in a hands-free manner.

Abstract: A heat exchanger tube (2, 2a, 2b) is made using a hollow, impermeable, monolithic ceramic inner tube (4) and wrapping the inner tube with a circumferentially extending reinforcing material (12) impregnated with a slurry of ceramic particles, particle carrier medium and thermoset binder. The combination of the inner tube and the impregnated reinforcing material is first heated to solidify the thermoset binder. The combination is then sintered to drive off the particle carrier medium and themoset binder to create a two-layer heat exchanger tube including the inner tube and an outer tube (6).

Abstract: A rubber composition comprises a hydrogenated NBR, zinc dimethacrylate, zinc diacrylate, or an admixture thereof, an epoxy compound and an organic peroxide vulcanizer. A hose is also provided, comprising an inner tube, a reinforcement layer and an outer tube, at least the inner tube being formed from the above rubber composition.

Abstract: A pipe for conveying solids, particularly for conveying concrete, includes a cylindrical middle portion and a welding neck with a coupling ring flange. The welding neck has an inner layer and an outer layer, wherein the inner layer is of a material which has a greater resistance to wear than the outer layer. The inner layer and the outer layer have end faces which extend in a common transverse plane. The inner layer is of ceramic material or of cast material resistant to wear by impacts, such as, Ni-hard IV, and the entire surface of the inner layer is glued into an internal groove of the coupling ring flange.

Abstract: The method for preventing the propagation of cracks in plastic pipes consists substantially in that at predetermined locations of the tube sections of reduced diameter are foreseen, but to provide these sections with a view of reinstating the static strength simultaneously with a reinforcement which does not form a homogeneous compound with the material of the tube. This is made preferably by application of a correspondingly designed crack stopping element between to tube ends or by inserting such a element between same.

Abstract: A pipe joint for fiber reinforced composite pipe has internal and external matching tapers with a low taper angle. A half round helical groove is formed in each of the internal and external tapers for receiving several turns of a ductile key. The pipe joint is usable on high strength lightweight fiber reinforced composite pipe having helically wound steel strips embedded in the fiber reinforced resin. The pipe joint on such pipe is on an enlarged portion of glass fiber reinforced composite built up on an end of the pipe. The steel strips are terminated at differing distances from the end of the pipe joint and the ends of all of the steel strips are completely embedded in the fiber reinforced resin.

Abstract: A tube containment system. The tube containment system does not significantly reduce heat transfer through the tube wall. The contained tube is internally pressurized, and is formed from a ceramic material having high strength, high thermal conductivity, and good thermal shock resistance. The tube containment system includes at least one ceramic fiber braid material disposed about the internally pressurized tube. The material is disposed about the tube in a predetermined axial spacing arrangement. The ceramic fiber braid is present in an amount sufficient to contain the tube if the tube becomes fractured. The tube containment system can also include a plurality of ceramic ring-shaped structures, in contact with the outer surface of the tube, and positioned between the tube and the ceramic fiber braid material, and/or at least one transducer positioned within tube for reducing the internal volume and, therefore, the energy of any shrapnel resulting from a tube fracture.

Abstract: A sleeve for protecting and reinforcing a fusion splice of two or more optical fibers. The fusion splice protector includes a heat-shrinkable sleeve adapted to surround the fusion splice and adjacent portions of the fused optical fibers, a stress-relieving support element adjacent the fusion splice, and a hot-melt adhesive contained within the sleeve for retaining the support element adjacent a longitudinal section of the sleeve. The support element is designed to impart varying elasticity along a length of the sleeve such that the fusion splice protector is more rigid at the central portion of the sleeve member than at its ends. This may advantageously be achieved by providing a support element having a cross-sectional profile which varies along the length of the sleeve. The support element is preferably constructed of a polymer or polymer blend, most preferably one having a coefficient of thermal expansion which is approximately equal to the coefficient of thermal expansion of the optical fibers.

Abstract: A Coriolis flowmeter whose flow tubes are made, at least part, of anisotrophic materials such as fiber reinforced composites. The composite material is formed by controllably orienting the fibers in one direction to increase the tensile strength of the material in that direction. Selected areas of the flow tubes are formed of this composite in order to increase the flowmeter sensitivity and to better separate the desired flowmeter vibrational frequencies from the undesired vibrational frequencies. Circumferentially oriented fibers increase the internal pressure containment capability of the flow tubes. A strain gauge affixed to the flow tube flexes with flow tube deformation to indicate the internal flow tube pressure.

Abstract: An improved pipe construction is disclosed having an inner and outer surface, intermediate walls having a top and bottom, and a plurality of primary internal cells. Each of the primary internal cells has a cell surface wall, collapsible ribs attached to the intermediate walls, collapsible apertures positioned on opposite sides of the intermediate walls and apertures, and internal flanks. Each of the collapsible apertures has an inner wall surface, with each inner wall surface having a deformable surface portion. Each of the end apertures is positioned between the collapsible apertures and primary internal cells. Each of the end apertures has an inner wall surface. The internal flanks are positioned intermediate the end apertures and the collapsible apertures. A method of forming the pipe of this structure is also disclosed.

Abstract: A hose for an aircraft parked at a remote location from a source of pre-conditioned air through which the pre-conditioned air, under pressure, is delivered through the hose, wherein the hose construction uses to advantage a length portion having a bellows, in that the bellows folds are constrained by an internal strap from longitudinal expansion and thus are not "blown out" by the pressure air and yet, retain degrees of rotation and contraction.

Abstract: A bonded fabric comprising a mesh of filament yarns of the core-sheath type having little or no elasticity in the longitudinal direction but which will break when bent without affecting the filaments in the core.

Abstract: Unreinforced or reinforced concrete moldings, for example concrete pipes, with improved corrosion resistance to acids and acidic sewage, improved permeation resistance to inorganic and organic liquids and gases and improved mechanical stability, produced by molding with machines, for example in press molding machines or extrusion machines or concrete pipe pressing machines, and allowing to harden plastic-viscous concrete mixtures of hydraulic inorganic binders, preferably cement, aggregates and water, where, in the preparation of the plastic-viscous concrete mixtures, to the latter has been added in a positive mixer an effective amount of an aqueous plastics dispersion based on anionic and hydrolysis-resistant copolymers of ethylenically unsaturated monomers, the minimum film forming temperature (MFT) of which is above the setting temperature of the concrete mixture, preferably above 23.degree. C.

Abstract: Air conduit construction is provided. The construction generally comprises a conduit section having an open end; and, a support member positioned inside of the conduit section open end. In preferred arrangements, the conduit construction has two open ends, with a reinforcing member in each of the open ends. In preferred arrangements, the reinforcing member includes a friction fit construction on an outer surface thereof. In typical and preferred embodiments, the friction fit construction includes a bead on the reinforcing member. A method of preparing air conduit constructions is also provided.

Abstract: A method and structure for the integral reinforcement of HVAC ducting including the steps of laying out one or more planar sheet metal blanks having portions defined therein dedicated for integral rib reinforcement; placing relief slots in the dedicated portions of the blank corresponding to the seams and folding lines; forming the integral reinforcement rib from the dedicated blank material; bending the blanks along fold lines and assembling the rectangular duct; and placing rib corners over the reinforcing rib ends at the corners of the duct. Alternatively, the step of cutting the reinforcing rib at the fold lines may be substituted for the step of placing slots in the blank. The completed structure includes reinforcing ribs circumferentially positioned around the duct or on the planar duct surfaces, the ribs being formed of, and integral to, the duct itself. Pre-manufactured rib corners serve to seal and strengthen the reinforcement ribs as required.

Abstract: Polyfluorocarbon/elastomer bonded laminates are disclosed. Flexible, durable chemical-resistant hose for use in industrial applications, and improved construction for such hose including inner tube members characterized by a dual-layer feature employing such laminate, is also disclosed. This feature comprises an adhesive elastomeric composition which bonds a polyfluorocarbon thermoplastic veneer to a substantially non-polar chemical-resistant carbon-based elastomeric or thermoplastic elastomeric outer layer. The adhesive elastomeric composition useful in the present invention comprises unsaturated polymeric dicarboxylic acids, or derivative adducts, of ethylene propylene diene terpolymer.

Abstract: Unreinforced or reinforced concrete moldings, for example concrete pipes, with improved corrosion resistance to acids and acidic sewage, improved permeation resistance to inorganic and organic liquids and gases and improved mechanical stability, produced by molding with machines, for example in press molding machines or extrusion machines or concrete pipe pressing machines, and allowing to harden plastic-viscous concrete mixtures of hydraulic inorganic binders, preferably cement, aggregates and water, where, in the preparation of the plastic-viscous concrete mixtures, to the latter has been added in a positive mixer an effective amount of an aqueous plastics dispersion based on anionic and hydrolysis-resistant copolymers of ethylenically unsaturated monomers, the minimum film forming temperature (MFT) of which is above the setting temperature of the concrete mixture, preferably above 23.degree. C.

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 composite concrete pipe in which both the inner and outer surfaces are plastic. The pipe may be formed of any diameter by forming the inner and outer plastic surfaces from helically wrapped interlocking plastic strips to form the diameters desired.

Abstract: A reinforced flexible corrugated tube comprising a plurality of corrugations and connecting members for connecting each of said corrugations for reinforcement of same, wherein the first pair and last pair of corrugations are each connected by at least one connecting member, and all other corrugations are connected by at least one first and at least one second connecting member, with the first connecting members being offset with respect to the second connecting members.

Abstract: A multi-layered liner for lining a pipeline which has an external jacket, an interior liner, a woven intermediate layer between the external jacket and the interior liner. At least one optical fiber is in the woven intermediate liner for purposes of monitoring stress or for communication, and a capacitance leak detection circuit is also in the multi-layered liner for the purpose of detecting leaks in the multi-layered liner. Also included is the method of monitoring a pipeline for stress or leakage by use of a stress detector connected to an optic fiber in a multi-layered liner installed in the pipeline and a leak detector connected to a capacitance circuit in a multi-layered liner installed in a pipeline.

Abstract: A branched pipe fitting, such as a pipe tee, of plastics material has structure for preferential stiffening the side regions of the fitting. In one embodiment, the stiffening structure may include ribs crossing at the side apex point of the tee but not extending across the crutch points.

Abstract: A bending device includes a bellows with an internal space, an operating wire for bending the bellows, and multiple pairs of independent limitation structures for limiting an axial compression of the bellows. The bellows includes a corrugated peripheral wall defined by first portions that bulge radially outward and are arranged alternately with second portions that bulge radially inward. The peripheral wall has first and second regions, each of which includes a predetermined number of alternating first and second portions. A pair of limitation structures are mounted on diametrically-opposite sections of each of the first regions and on diametrically-opposite sections of each of the second regions. The sections of each first region are spaced from each other in a first direction while the sections of each second region are spaced from each other in a second direction.