Abstract: An introducer sheath includes a connector body having an inlet and an outlet; a flexible tube for intravenous use at the outlet, including a helical coiled spring having a plurality of coils, each coil spaced from an adjacent coil, and a thin cylindrical wall prepared from a protective coating composition completely surrounding the spring to define an inner and an outer wall surface, the portion of the cylindrical wall surrounding each coil having a first thickness and the portion of the cylindrical wall between the spaced coils having a second, smaller thickness, with the inner and outer wall surfaces being indented thereat, the coating composition comprising a thermoplastic polymeric material dissolved in a solvent solution, the composition having a solids content ranging from about 4% to about 18%, and said solution comprising a solvent selected from the group consisting of tetrahydrofuran, dioxane, methyl ethyl ketone, dimethylformamide, cyclohexane, and mixtures thereof, formed on a helical coiled spring

Abstract: A pipe made of a synthetic resin and suitable for underground use which has an improved strength and reliability. In a first embodiment, a helical reinforcing rib is provided by extruding together with a band of resin material which forms the main body of the pipe a corrugated tube. By passing the corrugated tube through the extrusion die, the danger of the wall thickness of the main body of the pipe being reduced is eliminated. In a second embodiment, the reinforcing rib is formed by helically winding a reinforcing member having at least an outer coating of either the same material which forms the main body of a straight-wall pipe or a material having a high fusibility therewith. In this case also, the reinforcing rib can be made from a corrugated tube having a semicircular cross-section.

Abstract: A hose comprising extrudable polymer reinforced with discontinuous fibers oriented in the radial direction is described.

Abstract: Subsea pipe line sections adapted to be welded together into a continuous subsea pipe line are provided with a weight coating which, apart from its weighting function, also serves to protect the pipes. The weight coating comprises a composite material substantially consisting of a granulated iron ore in a matrix of a thermosetting resin, covered by a high strength durable plastic tube.

Abstract: A crash protection structural component is constructed as a hollow sleeve pe body which is open at its ends. The hollow body is made of at least one strand of fiber compound material formed into a netting. The netting is constructed for an irreversible stepwise take-up of energy in response to a shock load or impact, whereby the strand layers delaminate at the strand intersections or junctions of the netting as the strand layers are taking up shearing loads in response to a compression load which is applied to the component in the direction of its longitudinal axis.

Abstract: A flexible hose composed of a membrane which comprises soft and hard strip members alternatively disposed in a spiral form. A connector element is disposed to extend through the center of the thickness of the soft strip member and bilaterally of the hose in its axial direction. Both the projected portions of the connector element and the hard strip members adjacent the soft strip member are interconnected.

Abstract: A flexible tube for conveying a mixture of a liquid or solid material containing objects with sharp points, edges or similar projections, the internal wall part of said tube consisting of an elastic material, especially rubber, in which a wearproof material is present in the shape of rod-shaped elements which are provided essentially parallel and at a distance form one another in said internal wall part in such a way that they extend themselves between the inner and the outer surface of said internal wall part, the shortest distance between the most closely spaced wall parts of said elements being at least equal to the greatest dimension (D) of the rod-shaped elements as seen in the radial direction of said elements.

Abstract: A flexible pipe for transporting various fluids such as oil, gas, water or the like. The flexible pipe comprises at least one internal plastic sheath which may be provided on an inner carcass, a short pitched metal armor layer provided on the internal plastic sheath to mainly share a circumferential force due to inner pressure, a long pitched metal armor layer provided on the short pitched metal armor layer to mainly share a longitudinal force and an external plastic sheath provided on the long pitched armor layer.

Abstract: A rubber tube for dredging work embedded in and used in a pipe-line used for dredging work in the sea or river. This rubber tube has a tubular body made of rubber having a plurality of strengthening clothes embedded therein, and a plurality of metal rings axially arranged in a suitably spaced relation which are embedded in an inner peripheral surface of said tubular body and which inner peripheral surface forms a part of the inner peripheral surface of said tubular body. The metal rings have their joined surface with the tubular body placed in parallel to the axis and axial both ends thereof made thin in wall-thickness. Thereby, a contact area between the metal ring and the tubular body is increased to strengthen a bonding force and minimize a peeling off of the joined surface between both ends of the metal rings and the tubular body.

Abstract: A rubber tube for dredging work embedded in and used in a pipe-line used for dredging work in the sea or river. This rubber tube has a tubular body made of rubber having a plurality of strengthening clothes embedded therein, and a plurality of metal rings axially arranged in a suitably spaced relation which are embedded in an inner peripheral surface of said tubular body and which inner peripheral surface forms a part of the inner peripheral surface of said tubular body. The metal rings have their joined surface with the tubular body placed in parallel to the axis and axial both ends thereof made thin in wall-thickness. Thereby, a contact area between the metal ring and the tubular body is increased to strengthen a bonding force and minimize a peeling off of the joined surface between both ends of the metal rings and the tubular body.

Abstract: A shower pipe for a rotary drum filter has a square cross-sectional shape defined by top, bottom and side walls. The sidewalls and a pair of lengthwise-extending continuous diffusion flanges depending from the bottom wall of the pipe stiffen the pipe against sag for placement at a 12 o'clock position spanning the filter drum. The pipe is formed of fiberglass reinforced plastic in two longitudinally-divided hollow sections in a pair of mirror image, trough-like molds. Each section has a pair of interconnection flanges for mating the sections together. The interconnection flanges extend normally to the sidewalls to stiffen the pipe when the bottom wall of the pipe is vertically-oriented for placing the pipe at at 9 o'clock position along one side of the filter drum. Glass rods are secured in the interior corners of the pipe to provide diagonal rigidity, for placing the pipe at, e.g., a 10-11 o'clock position between the top and side of the filter drum.

Abstract: A hose structure resistant to pressure and vacuum as well as kinking or collapsing which exhibits good recovery from crushing includes in its wall structure elastomer embedded reinforcing cords extending in opposite hand helical patterns about the hose axis and a filler layer of elastomeric material having a thickness from about one fifth to about one fifteenth of the mean radius of the filler layer from the hose axis. The filler layer elastomeric material is of high tensile modulus and hardness and preferably includes short length fibers dispersed throughout oriented predominantly generally in the circumferential direction of the hose.

Abstract: A process of manufacturing carcass bands which are reinforced by cords and are to be employed in fabricating a radial tire.

Abstract: Pipes of polypropylene reinforced with carbon fibers comprising 100 parts by weight of polypropylene, 10 to 40 parts by weight of a modified polypropylene by an organic unsaturated carboxylic acid or a copolymer of propylene and the organic unsaturated carboxylic acid and 5 to 70 parts by weight of carbon fibers of 5 to 30 micrometers in diameter and a ratio of diameter to length of 10 or more. The rate of retention of the original tensile strength of pipe in boiling water for 6 months at 100.degree. C. was higher than 95%.

Abstract: A formable hose with a reformable wire embedded solely in a thicker portion of the hose cover, the reformable wire oriented longitudinally of the hose.

Abstract: A hose of rubber material with a reinforced hose wall for conveying in wet condition large volume sharp-edged solid materials while the inner wall of the hose utilizes a rubber layer as protection against wear. Metallic bodies are embedded in and adhering to the rubber layer and have substantially the same thickness as the rubber layer.

Abstract: A reinforced plastic composite structure, particularly a pipe, is disclosed herein. The composite pipe, which resists acid attack even in underground applications where the pipe is subjected to external loading stresses, typically includes at least an inner zone, e.g. a resin impregnated fibrous sheet and an outer zone including a layer or layers of fibers. A cured polymeric resin matrix bonds the fibrous sheet and the fibrous layers together in a laminar relationship. The improvement disclosed herein comprises incorporating into this polymeric resin matrix a particulate substance which has specific particle size limitations and which is selected from the group consisting of portland cement, marble dust or a mixture thereof.

Abstract: A light and strong tube structure for frames of bicycles and motorcycles has its cross sections with a variable thickness of the tube wall. Said wall is formed by two or more layers of different materials, of which at least one is metallic material and at least another one has a preferential direction of tensile strength. Preferably, the straight cross sections of the tube are outwardly defined by a circle and inwardly defined by an ellipse and the said layers comprise an external metallic layer and an internal layer of fibers incorporated into resin.

Abstract: The casting tube is constituted by a mixture of refractory particles and fibers embedded in a binder which is not capable of withstanding the temperature attained when liquid metal flows within the tube. The refractory particles are sinterable in a tube zone which is directly exposed to the heat of the liquid metal. At least in a zone which is not directly exposed to the heat of the liquid metal, the casting tube also contains a refractory binder which is capable of withstanding the heat in this zone.

Abstract: A hose comprises an inner supporting tube (1) and an outer protective cover (2), both made of an elastic material. Between the supporting tube (1) and the protective cover (2) there are disposed at least two pairs (3) and (4) of reinforcing plies (5), (6), (7), (8) arranged one directly on another, and a nonmetallic-fabric interlayer (10) disposed directly on the surface of the supporting tube (1) and serving to uniformly distribute the forces arising between the supporting tube (1) and the pairs (3) and (4) of the reinforcing plies (5), (6) and (7), (8). Each of the reinforcing plies (5), (6) and (7), (8) is made in the form of a set of helically wrapped parallel threads (9), and each pair (3) and (4) of the reinforcing plies (5), (6) and (7), (8) is made in the form of two sets of symmetrically wrapped threads (9).

Abstract: The present invention relates to a bending strain relief device with adjustable stiffness to be used in connection with cables or pipes. The stiffness of the device is made adjustable by having an expandable body arranged between the cable or pipe and a stiffening rod arrangement. When inflated, the expandable body causes increased friction between the stiffening rod layers and the relief may be locked in any desired position.

Abstract: A sound attenuator comprising concentric inner and outer tubular members having sound absorbing material positioned therebetween. The inner tubular member comprises a lattice of reinforcing strand material coated with solidified resin wherein the strand material is formed in opposed generally helical patterns to provide the lattice. The attenuator is suitable for use in reducing noise produced by axial flow fans used in industrial environs such as mines and factories.

Abstract: Filament-wound composite bodies are disclosed. These bodies contain filament-wound fibers and resin. The resin, when cured, has a density of less than 1.05 g/cc and exhibits a water pick up of less than 1% by weight. When uncured, the resin contains an aromatic vinyl hydrocarbon monomer and as its major component poly(1,2-butadiene), carboxy-terminated poly(1,2-butadiene) or mixtures thereof and has a viscosity of less than 2000 cps at 45.degree. C. These filament-wound bodies advantageously are embodied as rocket motor cases.

Abstract: A glass fiber-reinforced cement non-plate article is composed of an inside mortar layer comprising a mixture of normal Portland cement and glass fiber chopped strand, an outside mortar layer comprising a mixture of normal Portland cement and glass fiber chopped strand, and a regulated set cement mortar layer interposed between said both layers by the aid of a continuous glass fiber layer.

Abstract: Tube for a cracking plant, comprising an inner tube, a coaxial outer tube and a reinforcement layer intermediate said inner and outer tube, said reinforcement layer having openings or passages through which said inner and outer tube are bonded together.

Abstract: A method for making a radially compliant acoustic line array hose with imved toughness and wear resistance, suitable for use in towed acoustical line array sonars. The hose comprises a long extruded cylindrical tubing of a soft flexible grade of geophysical, plasticized polyvinyl chloride material with longitudinal ribs of a stiffer, harder grade of geophysical plasticized polyvinyl chloride material located at or near the tubing surface, and spaced uniformly around the circumference of the tubing. The ribs are melt-bonded to the softer thermoplastic material while each is in their respective melt stages during the extrusion process.

Abstract: An energy saving heat recycling system for circulating hot air from the upper portion of a building, near the roof, to the lower portion of the building, near the floor level, to reuse the hot air to heat the lower portion of the building, such system comprising a generally cylindrical supporting sleeve, an electric fan including a fan motor mounted within the sleeve and a fan rotor to be rotated by the motor within the sleeve, means for mounting the sleeve in the upper portion of the building whereby the electric fan is to draw hot air into the intake end of the sleeve while discharging the hot air from the discharge end of the sleeve, and a flexible tubular duct connected to the discharge end of the sleeve for conveying the hot air to the lower portion of the building near the floor level, the duct being in the form of a tube made of thin flexible material which is compactly foldable for storage and shipment and is readily capable of being bent around obstructions and threaded through openings in the buildi

Abstract: A multiple laminate comprises at least one laminate which is tapered at one or both ends to provide a laminate joint structure having a coupling tensile strength greater than the laminate interlaminar shear strength. The laminate joint structure contains at least one tapered laminate ply support structure containing continuous filament strands oriented parallel to the coupling load direction. The tubular laminate form of the tapered end laminate joint structure finds particular application to mechanically joined structures such as pipe and trusses.The method and apparatus for making the laminate in the form of a desired composite structure comprises winding a first ply of circumferentially oriented continuous filament strands upon a mandrel and forming the ends of the first ply to have sufficient thickness to provide an inwardly tapered conical shaped exterior surface.

Abstract: A flexible pipe comprising a first set of stress bearing elements extending substantially the whole length of the pipe, for accommodating maximum hoop stress resulting from flow of pressurized fluid through the pipe, and a second set of stress bearing elements extending substantially the whole length of the pipe for accommodating longitudinal stress resulting from a flow of pressurized fluid through the pipe.

Abstract: Cellulose fibers are treated with vinyl chloride polymer, a plasticizer and an isocyanate bonding agent. Composites are made from cellulose fibers dispersed in a matrix of plasticized vinyl chloride polymer, and bonded thereto with an isocyanate bonding agent. The composites can be molded or extruded to produce useful articles.

Abstract: Flexible production tubing is wound about a reel for easy and convenient transport to and from a well site. A submersible pump is attached directly to the end of the flexible tubing and is lowered through the well casing to a producing formation. Insertion and withdrawal of the flexible tubing is accomplished with a hydraulically powered drive sprocket assembly mounted above the well head equipment. The flexible tubing is reinforced by striker plate assemblies which are engaged by the teeth of the drive sprocket, thereby providing positive traction for insertion and withdrawal without damaging the flexible core. The flexible production tubing includes a high strength injection core, a tubular production conduit embedded within the core, and a series of striker plate assemblies partially embedded within the core.

Abstract: The present invention concerns the use of polyester materials in arc quenching applications, particularly in the cutout fuse tube industry. In one embodiment of the present invention a fuse tube is disclosed as comprising a laminate two-layered structure including as its inner layer, (or liner), a polyester filament winding supported in a cured cyclo-aliphatic epoxy resin matrix. The outer layer includes wound glass filaments supported within a cured epoxy resin matrix.

Abstract: The present invention concerns improvements in the use of polyester materials in arc quenching applications, particularly in the cutout fuse tube industry. In one embodiment of the present invention a fuse tube is disclosed as comprising a laminate two-layered structure including as its inner layer, (or liner), a heat-treated polyester filament winding supported in a cured cyclo-aliphatic epoxy resin matrix. The outer layer includes wound glass filaments supported within a cured epoxy resin matrix. The heat treatment of the polyester filament substantially improves the mechanical and electrical character of the fuse tube.

Abstract: A steel reinforced pipe has a structural wall section sandwiched between inner and outer linings. The inner and outer linings each comprise resin-rich layers reinforced with glass or other fibers to impart the desired characteristics to the inner and outer pipe surfaces. The structural wall section comprises three or more structural steel reinforcing strips encapsulated with a structural epoxy resin and helically wound in the form of helical convolutions one over the other about the pipe axis such that the convolutions of each strip are axially separated from one another, by the epoxy resin, a distance not greater than 3 mm and radially separated from the convolutions of the next adjacent strip, by the epoxy resin, a distance not greater than 0.25 mm. The structural steel reinforcing strips preferably have a width between 100 mm and 200 mm and a thickness between 0.25 mm and 0.75 mm.

Abstract: An improved flexible reinforced hose (14) for use in the conveyance of fluids under pressure. The hose has a core tube (1) and an outer protective sheath (7). Disposed between the core tube and the sheath is a plurality of layers of reinforcement of which at least two of the layers comprise synthetic fibers having a tenacity of from about 12 to about 25 grams per denier and an elongation at break of from about 2% to about 8%. The hose is provided with improved resistance to pressure pulsation and flexing fatigue as a result of the said synthetic fiber layers being positioned in prescribed helically wound and/or braided combinations in conjunction with a prescribed twisted relationship that features the fibers closest to the core tube as a plurality of the same or different deniers of the fiber in the form of a plurality of cords having a twist of more than about 1.5 turns per inch and the fibers outwardly adjacent thereto as a plurality of the same or different deniers of the fiber having a twist of about 1.

Abstract: A fiber reinforced epoxy resin article in which a Lewis base is employed as the catalyst for the addition reaction of a phenolic or alcoholic hydroxyl group and the oxirane group of the epoxy resin. The resin system has improved flexibility and pot life and the cured article has improved chemical resistance.

Abstract: A fiber reinforced plastic pipe is provided with an integral flange, comprising circumferentially extending glass fiber fabrics. As the width of the fabrics exceeds the width of the finished flange, the fabrics are provided with inwardly bent parts at one or both side walls of the flange, or with undulating parts.

Abstract: Thin-walled metal duct particularly useful for heating and air-conditioning purposes is usually made by grooving, spiral wrapping, and seaming strips of thin metal sheet. The resultant tubular form provides the necessary rigidity to resist collapse of the tubular form. In the past, at least one end of the ribbed tubular ducts have been reformed to permit the ducts to be joined together. The end reforming techniques of the past have resulted in reformed ends having insufficient rigidity and strength to resist the abuse the ducts frequently receive in shipping, storing, handling, and installation.The present product, method, and apparatus provide a ribbed thin-walled tubular duct having reformed ends with rigidity and strength superior to the prior art products. This achievement is accomplished in the present invention by moving more metal into the end portion of the duct prior to reforming the end portion, thus reinforcing the end portion of the duct.

Abstract: A hose end construction comprising a hose main body and a connection metal fitting secured to the end portion of said hose main body by means of a clamping ring and a ferrule circumferentially tightening the end portion of said hose main body to said connection metal fitting.

Abstract: A thermoplastic hose construction and method of making same wherein a thermal bond is achieved directly between the reinforcement and cover without the necessity for intermediate bonding materials. An open flame played upon a reinforced core tube, wherein the reinforcement consists of yarn windings at least one of which is partly formed of continuous filaments of olefinic material compatible with an olefinic based cover, softens the compatible strands just prior to extrusion of the cover thereover to provide a distributed bond of discontinuous contact areas between the reinforcement and cover. In a preferred embodiment of the invention polypropylene is used as one yarn in the reinforcement for bonding with a thermoplastic rubber cover.

Abstract: A synthetic resin, fiberglass reinforced tubular member having an integrally attached metallic element is disclosed, along with a pressure gelation method of fabricating the same. The tubular member is used in making electrical hot line tools, and to this end the metallic element is composited to the tube body without use of metallic fasteners or the like. In practice, a preimpregnated fiberglass material is wrapped about a mandrel to present a predetermined number of layers thereof, whereupon the metallic attachment is temporarily affixed to the fiberglass layer, preferably by placing strips of the wrapped material against the edges of the attachment and in bridging relationship to the wrapping. The fiberglass material is then cured to embed the attachment in the sidewall and yield a fused, void-free monolithic structure.

Abstract: A hose is described having the usual elongated polymeric body and a coiled insert member formed of a plurality of turns contained within the internal passageway of the hose. The hose body has a normal tendency to swell under elevated temperatures or pressure whereby the coiled insert member may shift axially. This problem is solved by application of a filamentary band of expansion resistant material extending circumferentially about the hose body, which prevents enlargement of the hose during use at elevated temperatures.

Abstract: A reinforced tubular structure comprising a metal tube and a cured composite tubular liner which increases the longitudinal stiffness of the tubular structure, the liner being adhesively bonded to the inner peripheral surface of the metal tube. The reinforced tubular structure is fabricated by forming a laminate of the composite material, wrapping it around a flexible mandrel, inserting the mandrel and wrapped laminate into the metal tube, and co-curing the laminate to the inner peripheral surface of the tube.

Abstract: A high strength pipe comprising a corrugated metallic tube defining a series of annular troughs therewithin and a resinous material lining the interior surface to fill the troughs and create a smooth and corrosion resistant surface.

Abstract: A tube made from a rigid material such as PTFE is surrounded by a rigid tubular sheath. The ends of the synthetic material tube are provided with collars which emerge from the rigid sheath, the sheath having on its inner face, adjacent to each collar, a locking member. The locking member forms a substantially annular relief and penetrates a correspondingly shaped groove on the outer surface of the tube of synthetic material.

Abstract: An arm pipe for a record player tonearm comprises a composite material essentially consisting of a thermoplastic resin and graphite powder. The composite material is prepared by kneading the components, rolled to impart a degree of orientation to the graphite powder particles, which are in the form of flaky graphite and then molded into a pipe, along the surface of which the graphite particles are oriented. Arm pipes wherein the composite material is oxidized at the surface of the pipe and arm pipes wherein the composite material is carbonized or graphitized are also included. A light weight, rigid arm pipe having a high specific modulus of elasticity is obtained through a simple procedure at low cost.

Abstract: A composite reinforced plastic pipe and method of making the same are disclosed wherein a resin impregnated surfacing mat is formed into a tubular inner liner on a mandrel or the like, a plurality of resin impregnated continuous fiberglass strands are helically wound upon the inner liner to form an inner layer, a sand-resin composition is applied onto the inner layer to form a tubular core, and an outer layer of resin impregnated continuous fiberglass strands are helically wound upon the tubular core whereafter the composite pipe is cured to provide a pipe having high resistance to internal and external pressures.

Abstract: A flexible rubber hose has a spiral wound reinforcing core of resin bonded fibers embedded in the rubber, and a reinforcing insert, which may be woven or spiral wound, on the outer side of the helical core. The fibers are preferably glass fibers embedded in epoxy or phenolic resin.

Abstract: A composite reinforced plastic pipe having an integral bell end and method for making the same are disclosed wherein the composite pipe has a resin impregnated surfacing veil liner, a first resin impregnated continuous fiberglass strand reinforced layer coaxial along the inner liner, a sand-resin core layer formed along the cylindrical portion of the pipe but not on the bell end, a resin impregnated surfacing mat formed coaxially along the length of the exposed first fiberglass strand reinforced layer on the bell end and along the core layer, and an outer resin reinforced roving layer formed coaxially along the full length of the pipe, the composite pipe being cured to form a high strength pipe having uniform radial stiffness and improved resistance to water migration.

Abstract: A manifold with a knitted resin impregnated sleeve that is fabricated as a ontinuous unseamed configured sleeve and installed in the manifold to produce a seamless structure. The sleeve is knitted or woven from conventional materials and then install in the manifold to provide insulation for the manifold structure.