Abstract: A high strength flexible hose for conveying fluids under pressure wherein the hose includes a synthetic thermoplastic polymeric core tube, one or more inner reinforcing layers of a high strength aramid yarn having a section modulus of over 400 grams per denier and a tenacity of more than 15 grams per denier at room temperature, and one or more outer reinforcing layers of metal wire.

Abstract: A hose of improved impulse life is described including an inner polymeric tube which has a relatively hard outer surface, a tightly packed wire reinforcement e.g., braid or spiral, telescoped over the tube, and an expanded polymeric cushion matrix encapsulating at least a portion of the strands of the reinforcement and also promoting wire-to-wire and tube-to-wire adhesion. A method for producing the hose employing a foamable material applicator is also disclosed.

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: A hydraulic fluid system including fluid pressurizing means, such as a pump, and pressurized fluid utilizing means, such as a hydraulic motor, interconnected by flexible hose lines formed of material having cross-linked chlorinated polyethylene containing 25%-50% chlorine by weight as a prime constituent. The cross-linked chlorinated polyethylene material comprises, by weight, 30%-70% of the hose rubber material, and a hose constructed in accord with the invention has unusual resistance to high temperatures, flexing, high pressure and chemical corrosion.

Abstract: A method and apparatus are disclosed for producing a composite pipe for handling destructive materials under pressure and vacuum conditions. The pipe includes a tubular liner formed of thermoplastic material capable of withstanding the destructive material. A strip of glass fiber fabric is helically wrapped around the outer surface of the liner. Heat is applied externally to the wrapped liner at a sufficient rate to simultaneously melt the exterior surface of the liner and thermally expand the liner radially outwardly into the openings in the fabric. Upon cooling, a permanent mechanical bond is achieved between the liner and the fabric. A layer of fiber glass and resin is then applied to the outer surface of the wrapped liner for structural rigidity and strength.

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: A laminated tubular structure is obtained by a process in which a fabric sleeve is applied about a tube of thermoplastic polymer, following which plugs are inserted into the opposing ends of the liner. A liquid, such as water, is then introduced to the liner, and the liner is rotated about a horizontal axis while heat is applied to the exterior surface of the liner, causing the surface to become molten. The heat also causes vaporization of some of the liquid in the liner and the resulting vapor pressure causes the molten surface of the liner to expand radially into the interstices of the fabric sleeve. The inner surface of the liner remains solid and form-maintaining by reason of the liquid within the liner and heat absorbed on vaporization of liquid. Upon cooling there is obtained a good mechanical bond between the liner and sleeve.

Abstract: A blow-out guard is disclosed for use with high-pressure conduits. A double layer, wire sheath is fixedly attached over the end portion of the hose. If the hose should burst, the medium escapes through the interstices of the sheath and is thereby reduced to a dispersed effluent or a fine spray, thus protecting the operator.

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 composite, flexible tubing assembly (22) for conveying fluids along plural flow paths is provided by an integrated assembly of a relatively large diameter core tube (32) for conveying production fluid, electrical conductors (42, 44, 46, 48) and a plurality of relatively smaller diameter tubular conduits (38, 40) for conveying electrical power and/or pneumatic/hydraulic fluid to the drive motor of a downhole pump, respectively. High tensile strength is provided by a group (36A) of flexible strands (36) and a protective, high tensile strength polymer sheath (34) which encloses the core tube (32) and tubular conduits (38, 40). The assembly (22) is further strengthened by an injection body (58) of filler material disposed in the annulus intermediate the core tube (32) and the protective sheath (34).

Abstract: A method and article of manufacture is herein disclosed for eliminating the need for pressurized air in a vehicular pneumatic tire. A resilient tubular insert is inserted and carried within a tire casing to simulate pneumatic conditions. The resilient material possesses a longitudinal bore which in combination with a particular range of durometers, enhances the "pneumatic" characteristics of the tire insert. Preferably, the tire insert is discontinuous and is designed to have a diameter greater than the internal diameter of the tire casing under deflated conditions.

Abstract: The invention relates to a process for the continuous extrusion forming of a thermoplastic double-walled, foam-core conduit by the sequential steps of extrusion forming an inner plastic tube, evenly coating said inner tube with foam-core layer and extrusion forming and bonding an outer tube in contact with said foam-core layer, said outer tube being generally evenly spaced apart from said inner tube by said foam-core layer providing a plastic double-walled, foam-core conduit.

Abstract: A fabric which is suitable for reinforcing hose structures, particularly railroad air brake hose is provided. The fabric is biased such that the warp and filling yarns intersect at angles between about 87.degree. and 65.degree.. When the biased fabric is used to reinforce a hose structure, one set of yarns is oriented in a circular fashion about the circumference of the hose in order to provide support against expansion of the hose under pressure.

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 hose resistant to deformation is described which includes the usual polymeric tube and outer cover, and at least one annular reinforcement layer of fiber bundles sandwiched between the tube and cover. A polymeric aqueous-insoluble continuous film impregnates the fiber bundles and binds the reinforcement to at least one of the cover and tube, the continuous polymeric film serving to unexpectedly stiffen the hose appreciably. A method for producing the hose is described wherein the adhesive film is formed by applying a latex dispersion to the hose tube and/or reinforcement.

Abstract: A composite reinforced hose for conveying paint under pressure is provided with a core tube simultaneously coextruded from two or more thermoplastic synthetic polymers which are in intimate contact with each other. The inner layer of the core tube is nylon or other chemical resistant polymer which is substantially non-conductive and the outer layer is electrically conductive. The conductive polymer layer serves as a ground for static electricity.

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 thermoplastic hose is disclosed in which a reinforcement layer is made fom a combination of yarns and monofilaments to provide stereo interstices where mechanical bonds between the reinforcement and its adjacent element of the hose can be established.

Abstract: This disclosure relates to a fireguard for protecting a hose or an assembly of a hose and fittings. The fireguard includes a layer or tube of a silicone compound which is positioned around the hose, and a metal shroud or sleeve which encloses the layer of silicone compound. The silicone compound and the shroud protect the hose at normal temperatures and for a short length of time at a high temperature. In the event the high temperature persists for a length of time, the silicone compound decomposes to a layer of silica ash, which is held in place between the shroud and the hose, and the ash forms an excellent heat insulation for an extended time. The shroud is preferably flexible so that the hose may be bent, and the fireguard preferably also includes another layer of the silicone compound and a collar around each hose fitting.

Abstract: A longitudinally extending, circumferentially limited member is disposed upon the exterior surface of a tubular object such as hose, which member has a surface appearance contrasting to that of the exterior surface of the tubular object. Indicia is engraved within the surface of the longitudinally extending, circumferentially limited member and is rendered prominently visible by the difference in contrast between the two surface appearances.

Abstract: A flexible reinforced hose for conveying fluid under pressure and comprising a polymeric core tube covered by two or more layers of stranded reinforcement. Each layer of reinforcement is of a material having a lower modulus of elasticity than the next radially outward layer of reinforcement so that each layer may more readily expand in diameter than the next outer layer due to elongation of the strands when the hose is subjected to fluid under pressure to thus cause the radial load imposed by the fluid pressure to be distributed more evenly among layers. Each layer may comprise first and second sets of oppositely helically wound strands that may be either interwoven to form a braid or a knit or wherein the second set is wound over the first set.

Abstract: Hydraulic circuits having flexible hydraulic hoses forming part of the circuits are currently being operated at pressures in excess of 3,000 psi, and such circuits are often limited in their operating pressure by the burst strength of the hydraulic hose. By constructing a hollow core structure that forms the conduit and which serves as the foundation upon which the reinforcing is applied, with a two-layer tape composed of a layer of fabric and a layer of elastomer, which tape is then wound on a mandrel in a helically overlapping relationship with the fabric on the outside, an improved hose can be obtained after the reinforcing is applied. An increase in burst strength can be obtained in such a hose where wire cable is employed as the reinforcing in place of monofilament wire reinforcing, when the cable is formed (twisted) as it is applied, to achieve a more uniform tension on each of the strands forming the cable encircling the core structure.

Abstract: A flexible hose construction formed by the non-mandrel extrusion of an inner plastic liner having plural axially extending dovetail shaped projections, extrusion of a rubber support member over the liner in interlocking engagement, winding a yarn reinforcement over the relatively stiff composite core structure, extrusion of a rubber or thermoplastic elastomeric cover thereover and vulcanization of the structure.

Abstract: A high pressure hose construction and method of and apparatus for making the same is disclosed wherein the hose construction has a smooth walled inner liner of resilient polymeric material, and an adhesive layer, which may also be of polymeric material bonded to the liner. A braided cover is disposed over the entire layer and embedded therein. This braided cover is comprised of a plurality of elongated intermeshing strands of non-metallic fibers, such as yarn, and metallic fibers. Preferably, every three strands are of flexible, non-metallic fibers, such as nylon fibers, and every fourth strand is of metallic fiber, such as piano wire or spring steel. One set of strands crosses over and under another set to produce an intermeshing or weaving effect. These strands may also extend in a direction at an angle, such as 45.degree. or 53.degree.

Abstract: A chafe or fire sleeve for a hose is an integral coaxial structure having an inner layer of silicone and an outer layer of urethane in the range of 80%-20% urethane and 20%-80% silicone, respectively. The inner hose structure preferably comprises an elastomeric hose covered by braid, with the silicone bonded onto the braid. Five examples of materials are given, ranging from pure urethane to pure silicone and including three exemplary mixtures thereof. Pure urethane provides excellent antichafe, but not fire retardant, qualities; and pure silicone provides excellent fire retardant, but not necessarily as good antichafe, qualities. This particular invention is primarily directed to the fire retardant or fire resisting qualities of silicone, which is an ablative material that forms a refractory ash. The fire sleeve is an ablative material which tends to flake off the hose as it burns. This flaking is a disintegration of the hose which is one of the primary causes of the ultimate hose failure.

Abstract: Pipes or pipe fittings that are fire resistant and electrically conducting are formed by filament winding of a fire resistant, electrically conducting polymeric composition that includes 2 to 8% by weight of electrically conducting carbon black uniformly dispersed throughout the composition.

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 method for producing a high strength flexible composite hose, and a hose produced by the method. The method includes forming a hollow inner core of uncured thermosetting elastomeric material. One or more layers of reinforcement material are applied to the outer peripheral surface of the uncured core. The uncured core and the reinforcement material are then encapsulated with a thermoplastic elastomeric cover while maintaining the temperature of the core below its vulcanization temperature. The temperature of the core and reinforcement material and cover is then increased to and maintained at a temperature which is at least as great as the vulcanization temperature of the core but less than the melting temperature of the cover for a time sufficient to vulcanize the core.

Abstract: A polymeric hose and method of making same are provided wherein such hose comprises an inner base tube, a reinforcing braid made of aramid yarn disposed concentrically around the base tube with the aramid yarn having great affinity for water, a cover tube disposed concentrically around the reinforcing braid, and a moisture-impervious tubular film disposed between the braid and cover tube with the film isolating the aramid yarn and resulting in a tubular zone between the braid and cover tube free of water moisture created bubbles.

Abstract: A fluid adhesive composed of phenol formaldehyde resin and sufficient di(alkyl Carbitol) formal, where the alkyl radical contains from 1 to about 12 carbon atoms and yields a fluid composition, this fluid composition permits an elastomeric hose having an innertube of nylon to be adhered to a sulfur curable elastomer. This is reinforced by textile braid and covered with suitable Neoprene cover. This hose is suitable as a pressure hose in refrigeration or automotive uses.

Abstract: A partially cured flexible vulcanizable core useful in the manufacture of hose is described, the core being substantially cured with the exception of a layer at the outer surface of the core which remains substantially uncured.

Abstract: The reinforced flexible duct consists of a single- or double-ply reinforcing fabric, a wire helix, and a continuous extruded liner. The fabric, wire helix, and extruded liner are continuously helically wound on a mandrel. The freshly extruded liner adheres to itself, to the helically wound wire, and to the reinforcing fabric to form a continuous reinforced flexible duct. Optionally, a narrower continuously extruded and wound scuff strip can be wound over the wire helix.

Abstract: A fibrous reinforced flexible hose for conveying fluids such as paint under pressure is provided with a composite core tube preferably simultaneously co-extruded from two or more synthetic polymers which are in intimate contact with each other. The inner layer of the composite core tube is nylon or other chemical resistant polymer which may or may not be cross-linked and the outer layer is a cross-linked electrically semi-conductive synthetic polymer layer which serves as a ground for static electricity. In the process of making the hose, the semi-conductive layer is preferably cross-linked by irradiation as a means of improving its higher temperature performance capabilities and to minimize changes in the electrical resistance of the semi-conductive layer that might arise from dynamic use of the hose.

Abstract: A chafe or fire sleeve for a hose is an integral coaxial structure having an inner layer of silicone and an outer layer of urethane in the range of 80%-20% urethane and 20%-80% silicone, respectively. The inner hose structure preferably comprises an elastomeric hose covered by braid, with the silicone bonded onto the braid.

Abstract: A hose construction and method of making same are provided wherein such hose construction is made primarily of combustible polymeric material and has a tubular inside surface defining a longitudinally extending passage for conveying a fluid therethrough and has an outside surface; and, the hose construction has at least one member which has a fire extinguishing material comprising same disposed adjacent one of the surfaces with the fire extinguishing material being activated upon subjecting the member to combustion temperatures.

Abstract: This invention relates to an artificial sausage casing and a process for making the casing. In making a regenerated cellulose casing an oxazoline wax is incorporated into viscose in a proportion from about 1-20% by weight of the cellulose content in the viscose, the oxazoline impregnated viscose extruded into a tubular casing, coagulated, and the cellulose regenerated. The casing has excellent handle, flexibility, and peelability from sausages processed therein.

Abstract: A flexible composite hose which can be connected to a swageable fitting without creating a weakness in the hose adjacent the end of the fitting. The hose utilizes two or more braided reinforcement layers comprised of yarn formed from twisted strands of reinforcing material. During swaging, the twisted yarn in each reinforcement layer interlocks with the twisted yarn of the adjacent reinforcement layer preventing relative longitudinal motion therebetween and bunching of the reinforcement material which would create a weakness in the hose structure.

Abstract: A conduit such as a metal or flexible material fuel or oil tube is provided with a barrier to metallic fires through the use of the combination of carbon or graphite impregnated with a polymer resin to provide insulative as well as ablative characteristics.

Abstract: A vacuum cleaner hose having an electrical conductor for a motor driven work tool. The hose includes an inner and outer tube having a spacing therebetween which has been so chosen as to permit the electrical conductor therein to move relatively freely therebetween. The desirable result of the construction is that the vacuum cleaner hose is easier to handle and bend and at the same time the electrical conductor is carried within the hose and is not subject to the exposure of bare conductor wires due to wear.

Abstract: An open ended sleeve for a pinch valve is disclosed. The sleeve has a resilient tubular body member with an elastomeric liner forming a smooth tubular inner wall. A number of circumferential fabric layers surround the liner and are bonded thereto extending along the full length of the body member, a gum layer surrounds the fabric layer and a mounting flange is provided at each end of the body member, each mounting flange has a rigid annular ring therein having a cross section with rounded corners, the ring having an end face perpendicular to the longitudinal axis of the body and a sloped outer face tapered inward from the end of the sleeve. Fabric layers extend around and are bonded to only the outer face and end face of the ring, thus separation between the fabric layers and the ring does not occur when the sleeve collapses.

Abstract: A flexible hose construction and method of making same are provided wherein such hose construction comprises a flexible nylon-11 base tube, a braided reinforcing layer disposed around the base tube, and a layer of adhesive means between the base tube and reinforcing layer consisting of a mixture of a urethane prepolymer and a cross-linking material (4,4'methylene-bis-chloroaniline) defining the sole means bonding the braided reinforcing layer to the base tube.

Abstract: In a preferred embodiment a hydraulic brake hose comprises a polychloroprene inner tube, a reinforcing braid of twisted glass fiber yarn around the tube, a styrene-butadiene copolymer rubber cushion layer over the glass braid, a second reinforcing braid of nylon fiber yarn over the cushion layer and a cover layer of polychloroprene rubber.

Abstract: A method and apparatus are disclosed for producing a composite pipe for handling destructive materials under pressure and vacuum conditions. The pipe includes a tubular liner formed of thermoplastic material capable of withstanding the destructive material. A strip of glass fiber fabric is helically wrapped around the outer surface of the liner. Heat is applied externally to the wrapped liner at a sufficient rate to simultaneously melt the exterior surface of the liner and thermally expand the liner radially outwardly into the openings in the fabric. Upon cooling, a permanent mechanical bond is achieved between the liner and the fabric. A layer of fiber glass and resin is then applied to the outer surface of the wrapped liner for structional rigidity and strength.

Abstract: A composite reinforced vulcanized elastomeric hose is disclosed including a tube, an outer cover, an interlayer interposed between the tube and cover, and a reinforcement embedded in the hose wall. The outer cover and inner tube are composed of dissimilar polymers not readily bondable to one another, one of which is an EPDM type, and the interlayer is composed of halogenated butyl which securely bonds the dissimilar polymers together and provides a low permeability internal fluid barrier for the hose article with protection to the embedded reinforcement.

Abstract: A technique for producing flexible tubing for use in hydraulic systems employing non-combustible, force-transmitting liquids is described. An inner layer of the tube is formed from a load-carrying metal insert embedded in polychloroprene or natural rubber, which forms a good bond therewith. The exterior, liquid-contacting layers of the tube are formed from ethylene-propylene-terpolymer (EPDM) rubber, which withstands penetration by the hydraulic liquid. A good bond between the interior and exterior layers is provided by an intermediate layer formed from an EPDM-polychloroprene or EPDM-natural rubber mixture, the EPDM constituent being present in a proportion of about 50-80%. The transition layer may be embedded with a polymer-impregnated textile, either of cotton or of a synthetic substance such as rayon, polyamide or polyester.

Abstract: The invention relates to a sandwich tube comprising an inner and an outer fiber reinforced layer of thermosetting resin and an intermediate layer therebetween consisting of inorganic filler material coated with thermosetting resin and obtained by spraying a finely divided resin into a case of loosely laid inorganic filler material. A non woven is present between the intermediate layer and the outer fiber reinforced layer.

Abstract: A flexible reinforced hose comprising nylon tubing to which a reinforcement (braid or spiral wrapping) of a synthetic or natural fiber is bonded, said tubing having an outer surface plasticized with meta-cresol to which said reinforcement is applied. Prior to application of the reinforcement excess meta-cresol is wiped off from the tubing whereby minimal residual meta-cresol remains in the completed hose. In the case of reinforcing fiber other than nylon, the bond between the reinforcing layer and the nylon tubing is essentially a mechanical bond whereas in the case of nylon reinforcing fiber, the inner surface of the reinforcement is fusion bonded to the outer surface of the tubing.In the method of making the hose herein, nylon tubing passes through a heated meta-cresol bath with excess meta-cresol being wiped off the tubing prior to application for a reinforcement of synthetic or natural fiber on the plasticized outer surface of the tubing containing minimal residual meta-cresol.

Abstract: A hose construction having means for dissipating static electricity and method of making same are provided and such hose construction comprises a polymeric inner tubular layer, a braided layer disposed against the inner tubular layer and comprised of a plurality of filaments, and an electrically conductive layer made of carbonaceous particles overlying the braided layer and including particles dispersed between the filaments, the particles are disposed in overlapped relation in layer form and enable relative movement therebetween while maintaining electrical continuity to enable dissipation of the static electricity. The hose construction may comprise an additional braided layer disposed around the electrically conductive layer and sandwiching the electrically conductive layer between the braided layers as well as a protective layer disposed around the entire hose construction.

Abstract: A hose comprising extrudable polymer reinforced with discontinuous fibers oriented in the radial direction and a method for preparing such a hose by extrusion are described.

Abstract: The invention relates to a method of bonding certain aromatic polyamide to nitrile rubber compositions by applying to an aromatic polyamide a coating of a vinyl chloride polymer, preferably as a latex or plastisol, assembling the coated aromatic polyamide with the rubber composition and vulcanizing the rubber in contact with the coated aromatic polyamide. Preferably both the coating and rubber composition contain aldehyde condensation resin-forming ingredients or a partially condensed aldehyde resin. The reinforced composites produced are useful in hose, belting or tires.