Abstract: A composite tubular member having an outer cylindrical member containing fibers oriented to resist internal pressure while providing low bending stiffness, an inner smaller centrally located core member located near the neutral axis of the composite tubular member and containing fibers oriented to provide high axial stiffness, high tensile strength and low bending stiffness. One or more web members contain fibers oriented to resist shear stress, and connect the outer cylindrical member and the inner core member to form at least two separate cells within the composite tubular member. The web member forms a major and minor moment of inertia within the tubular member to create a preferred bending direction. Conductors are formed integral to the connecting web member for transmitting energy signals through the tubular member.

Abstract: A reinforced hose including at least one of a pressure-resistant reinforcement, a tensile-strength reinforcement and/or an inner carcass. At least one of the pressure-resistant reinforcement, the tensile-strength reinforcement and the inner carcass have at least one elongated element formed as one of a profile, a cable, an interlockable wire, and a strip with the at least one elongated element being composed of an aluminum-based alloy.

Abstract: A tubular structure, such as a pipe or pressure vessel, is provided with a wall formed from plastic, composites and elastomeric materials. The composite materials are spirally wound and are separated by elastomeric strips. The wall has an inner wall element formed by a continuous flexible plastic cylinder with a spiral projection on its outer surface. An outer layer is formed from alternating spirally wound strips of composite and elastomer. The composite strip has a radially inward projection axially spaced from the projection on the plastic cylinder but overlapping in the radial direction. The cylinder and layer are separated by an intermediate layer formed from composites and elastomeric strips. A composite strip is located between each pair of adjacent projections and separated from the projections by an elastomeric strip. An outer wall element is formed from alternating spirally wound composite and elastomeric strips having pitch greater than the inner wall element.

Abstract: A bar-like molding made of fiber-reinforced plastic materials of the type which can be extended by connecting pieces thereof, comprises a fiber-reinforced plastic covering layer formed by laminating a plurality of fiber-reinforced plastic layers and short length metal pipes for connection arranged at the ends of the fiber-reinforced plastic covering layer, the fiber-reinforced plastic covering layer including an inner fiber-reinforced plastic covering layer composed of a plurality of fiber-reinforced plastic layers and abutting at its ends against the respective inner end surfaces of the short length metal pipes for connection, and an outer fiber-reinforced plastic covering layer composed of a plurality of fiber-reinforced plastic layers and formed in such a manner as to cover the outer peripheries of said inner fiber-reinforced plastic covering layer and the short length metal pipes for connection, the reinforcing fibers of at least one of the plurality of fiber-reinforced plastic layers of at least one of t

Abstract: A paper sleeve and system for application as an insulated riser in a sand mold used to cast metal articles is disclosed. The sleeve, preferably cylindrical, is formed from a plurality of sheets of paper wrapped around one another with, preferably, a space between the edges of each sheet to provide a plurality of spaces or openings extending through the sleeve. Each sheet is treated with a precise amount of fire retardant. The sleeve for a given time period acts as an insulator keeping metal therein liquid until the metal solidifies in the article forming cavity of the sand mold and thereafter decomposes or reduces itself to a harmless carbon ash. The sleeve can function to both feed liquid metal to the article forming cavity in a sand mold and also to supply additional liquid metal to the article cavity upon solidification of the metal therein to eliminate the need for separate risers as now required in conventional foundry practice.

Abstract: In a tubular structure for forming a fishing rod, an amorphous metal long fiber tape is spirally or crosswise wound on a prepreg sheet tube with a predetermined pitch, not being overlapped in each turn, so that the prepreg sheet and the amorphous long fiber tape are joined together with high adherence, whereby its twisting strength, collapsing strength and bending strength are improved.

Abstract: An introducer sheath includes an extremely thin, flat wire metal coil that is surrounded only on its exterior surface with a plastic tube or coating. The flat wire coil optimizes the resistance of the sheath to buckling while minimizing the wall thickness of the sheath. The plastic covering being only on the outside of the metal coil optimizes the thinness of the introducer sheath wall while still providing a smooth outer surface for easy percutaneous insertion into an artery or other vessel of a living body. The higher density of the metal coil as compared to the plastic tubes of existing introducer sheaths, maximizes the radiopacity of the sheath for this thin-walled design. An alternative embodiment consists of two flat wire metal coils, one wound over the other, with a plastic covering the outer surface of the outer metal coil.

Abstract: A reinforced flexible duct, particularly for transporting pressurized fluid having an internal pressure reinforcement and a traction resisting reinforcement. The internal pressure reinforcement is wound at a high angle with respect to an axis of the duct and the traction resistant reinforcement comprises at least a pair of crossed layers wound at an angle of at most equal to 55.degree.. A ratio of stiffness traction resisting reinforcement to a stiffness of internal pressure resisting reinforcement is between 2.5 and 8 with a winding angle of the pair of cross layers of the traction resisting reinforcement having a value of between 20.degree. and 50.degree.. A ratio K.sub.t /K.sub.p of stiffness and the winding angle .alpha.

Abstract: A hollow lumen cable is formed by helically winding inner and outer coils with the helices of each coil being in an abutting relationship and the outer coil inner peripheral diameter being less than the outer peripheral diameter of the inner coil. Preferably, each coil is multifilar. After the coils are wound, an unwinding force is applied to the outer coil and the inner coil is inserted into the outer coil to have its winding inclined opposite to that of the outer coil; and thence, the outer coil is allowed to contract to form an interference fit with the inner coil. The cable may be incorporated as part of a medical apparatus. For example, the cable distal end is connected to an implantable pump or other rotatable medical apparatus and the proximal end to a powered prime mover.

Abstract: A reusable printing sleeve for supporting flexible printing plates, the sleeve having a limited circumferential resilience, whereby when subjected to air jets emitted from the apertures in the wall of a printing cylinder, the sleeve is dilated to facilitate the application of the sleeve to the cylinder or its removal therefrom. The sleeve is constituted by four or five interlaminated layers. The innermost one or two layers are comprised of wide strips of plastic film helically wound about a cylindrical shape. The outer three layers of the sleeve are constituted of three interlaminated layers each formed by helically wound of synthetic plastic tape. All three outer layers are wound at helix angles substantially different from the innermost layer or layers.

Abstract: A composite material tube, substantially insensitive to the variations of elongation under the effect of the internal pressure, comprising a number n of stable layers of reinforcement fibers, the fibers of each layer (i) being placed at the same winding angle in absolute value, referenced theta, with respect to the axis of the tube with an equal proportion of fibers wound at said angle in one direction (.vertline.theta.vertline.) as fibers wound in the opposite direction (-.vertline.theta.vertline.), the fibers of each layer being buried in a matrix which adheres to these fibers. The fibers of the same layer and the associated matrix have a volume referenced Y, the parallel fibers of the same layer and the associated matrix having overall a modulus of elasticity in the natural direction of the fibers, referenced E, wherein said n layers of fibers comply as a whole with the following relationship:0.35.ltoreq.A.ltoreq.0.

Abstract: A composite tubular member having an outer cylindrical member containing fibers oriented to resist internal pressure while providing low bending stiffness, an inner smaller centrally located core member located near the neutral axis of composite tubular member containing fibers oriented to provide high axial stiffness, high tensile stremgth and low bending stiffness and web members containing fibers oriented to resist shear stress, connecting the outer cylindrical member and the inner core member to form at least two separate cells within the composite tubular member.

Abstract: A composite golf club shaft and the method of constructing the shaft is disclosed. The hollow circular shaft includes a standard butt end having a constant outside diameter along a length of the shaft and a tip end having a constant outside diameter sustantially larger than the tip of a standard shaft, with the constant diameter of the tip end and butt end extending along predetermined lengths of the shaft. An intermediate section of the shaft tapers between the diameters of the butt and tip ends. The shaft is manufactured by wrapping a group of circumferential sections about a mandrel, each layer comprising either standard modulus carbon-graphite fibers or fiberglass fibers in a matrix, with the finished product being heat-cured to produce a golf club shaft.

Abstract: A hose having stable length under pressure comprises an internal leak tightness sheath, and armoring consisting of at least two pairs of layers of helically wound wires, the two layers of the same pair being made of identical wires laid at the same sheathing angle but in the opposite direction, and an external protective sheath. All the wires are laid at one of two sheathing angles, one less than 55.degree. the other greater than 55.degree.; the wires of at least one pair of layers exhibit one sheathing angle between 40.degree. and 53.degree., and the wires of at least one other pair of layers exhibit a second sheathing angle between 57.degree. and 70.degree..

Abstract: A boom for a boardsailing is formed of two bodies, intermediate pipes, end pipes, a front coupler and a rear coupler. The bodies and pipes are non-metallic synthetic resin pipe reinforced by fiber layers, including a synthetic fiber layer and at least one carbon fiber layer. The portions of said bodies, intermediate pipes and end pipes which are used for interconnecting with the couplers and with each other are further reinforced by a reinforcing synthetic resin layer which is reinforced by a reinforcing fiber layer. The reinforcing fiber layer includes fine fibers oriented in at least two mutually different directions and having diameters of 20 .mu.m or less.

Abstract: A method of producing an elongate article comprises the step of providing, by winding a filament, a plurality of superposed layers to form a hollow cylinder having open ends. At least one of the layers is formed of a circumferential winding and at least one of the layers is formed of a cross winding. The cross winding has fibers having a negative coefficient of thermal expansion and is oriented at a predetermined inclined angle to the cylinder axis. The method further comprises the step of securing to the open ends of the hollow cylinder end pieces comprised of a material having a high surface hardness and dimensional stability. The inclined angle has such a magnitude that temperature-caused changes in the axial length of the hollow cylinder compensate for temperature-caused changes in the axial length of the end pieces.

Abstract: A composite fiber and resin sign post for displaying highway signs which provides great reduction in vehicle damage in the event a vehicle moving at high speed collides with the sign post. This potential is achieved by the controlling the mode and location of the structural failure of the post upon impact. The failure mode of the post is controlled by varying the configuration of the post in cross-section, in combination with varying the specific fibers and resins, and in further combination with varying the location and placement of the fibers. The composite post may be constructed by pultrusion, filament winding, or related processes. A preferred embodiment uses a ground anchor socket constructed either by processes and components similar to those used in manufacturing the post, or by stamping sheet steel and spot welding to form a socket. The anchor socket provides additional control over the post failure and makes replacement of damaged posts quicker and easier.

Abstract: A bicycle frame made essentially entirely of an integrally bonded composite structure throughout its main structural tubular members and at the joints securing these tubular members to each other. The tubular members, which have round and aero cross sections, and the joints are laid up using layers and strips of high strength resin-impregnated unidirectional carbon fiber fabric. A non-compressible filler material is added at the joints to support the carbon fiber fabric so that its outer surfaces are all non-concave wherever possible.

Abstract: Disclosed are embodiments (30, 40, 50) of a flexible reinforced hose that is provided with substantial improvement in flex fatigue resistance by incorporating at least one pair of oppositely helically wound layers of fiberous reinforcement about core tube (1) having a singular wall or a core tube having a composite wall (15, 16) of fibers (3) having a tenacity of about 12 to about 25 grams for denier and an elongation at break of about 2% to about 8% that are disposed in alternating contiguous relationship to fibers (4) having a tenacity of from about 7 to 11 grams per denier and an elongation at break of about 9% to about 17%. The hose may include other helically covered and/or braided layers of reinforcement, preferably includes a protective covering jacket (8) and may or may not include structure such as an adhesive for bonding one or more of the reinforcement layers or the entire construction together.

Abstract: A reinforced flexible duct, particularly for transporting pressurized fluids having an internal pressure reinforcement and a traction resisting reinforcement. The internal pressure reinforcement is wound at a high angle with respect to the axis of the duct and the traction resisting reinforcement comprises at least one pair of crossed layers wound at an angle at most equal to 55.degree.. The modulus of elasticity of the material for the internal pressure resisting reinforcement is smaller than the modulus of elasticity of the material for the traction resisting reinforcement.

Abstract: In a flexible hose reinforced by wire plies, at least two wire plies are provided and the wires of each wire ply are disposed in helical convolutions about the longitudinal axis of the hose.The improvement is in that the wire plies satisfy the following formula: ##EQU1## wherein: subscript b indicated the plies arranged with left hand thread,subscript j indicates the wire plies arranged with right hand thread,r.sub.b and r.sub.b are the mean radii of the wire plies,N.sub.b and N.sub.b are the number of wires in each wire ply,F.sub.b and F.sub.b are the tensile strength of the wires,.alpha..sub.b and .alpha..sub.j are the angles of lay of the respective wire plies,l stands for the number of wire plies with left hand thread,m is the number of wire plies with right hand thread.

Abstract: A hose body is formed, or provided, to a predetermined length and so as to be continuous and contiguous. Articulation means are formed about and in close proximity to the hose body. This is accomplished by forming a wire helix about the hose body so as to either have a different number of turns per unit length of hose for first, second and third portions of the hose body, or by utilizing multiple strands of wire of different thickness for some portions of the helix and not for others, or by forming single helixes for some hose portions and double helixes for others; or by combinations of the above. The hose portions thus provided with articulation means have a different relative degree of articulation with respect to each other. As such they not only resist being articulated with different degrees but they also resist being straightened or straightening on their own with different degrees.

Abstract: A hose for transport of fluid such as oil for a cooling system of an engine oil cooler, a torque converter oil cooler, etc. and oil for an oil lubrication system of a vacuum pump that are used in automobiles, aircraft, etc., and the hose comprises an inner tube of acrylic rubber; a reinforcement ply including lower yarns spirally wound on the outside surface of aforesaid inner tube such that the size of mesh will be 0.5 mm or more, and upper yarns spirally wound on said lower yarns and an outer tube of acrylic rubber laminated over the outside surface of aforesaid inner tube through said reinforcement ply, aforesaid inner tube and aforesaid outer tube being directly bonded by vulcanization through the meshes of said reinforcement ply.

Abstract: Filament wound pressure tube has layers of filaments wound helically. The filaments of each such layer are disposed at an angle to a line parallel to the longitudinal axis of said tube which angle is approximately equal to a respective angle .theta. to the line, such angle .theta. being chosen such that the ratio sin.sup.2 .theta./r is approximately the same for all layers, where r is the radial distance from said axis to the location of such layer.

Abstract: A hose structure of simplified construction suitable for rigorous high pressure applications such as rotary well-drilling apparatus is described. The hose includes a heavy-walled tube of elastomeric material having a measured stress of at least 600 psi at 20 percent elongation, an elongation at rupture of at least 150 percent and a Young's modulus of at least 2000 psi. The formulation of the tube material includes a reactive resin system capable of polymerizing in situ.

Abstract: Apparatus for radial drilling into selected formations adjacent an earth borehole, the apparatus consisting of concentric, counterwound spring shafts operating in conjunction with a rotary drive source and a guide housing positionable to direct the rotating bendable shaft down and outward in a radial direction. The apparatus includes bit weight limiting means and guide housing locking means which enable effective radial drilling operation in any selected angular and/or radial directions to greatly multiply and enlarge the producing formation interface.

Abstract: An ultra-high pressure hose assembly capable of withstanding sustained internal fluid pressures exceeding 60,000 psi is disclosed herein and consists essentially of an innermost tubular core, a plurality of successive tubular layers and an outer containment sleeve. The innermost tubular core and containment sleeve are designed to add substantially no structural integrity to the overall assembly but rather function only as a fluid barrier and containment structure for the tubular layers respectively. The outer tubular layers serve as structural members of the overall assembly and respectively consist of individual bands which are alternately helically wound around and directly against the layers immediately below them at predetermined helix angles. Each band in turn consists of a number of separate steel wires which have opposing flat sides and which are positioned in unconnected edge to edge relationship to one another so as to form the band.

Abstract: A process for producing reinforced plastics tube for use, inter alia, as a transmission shaft wherein the tube is produced by winding on to a core reinforcing fibres preferably of carbon impregnated with a curable plastics at predetermined winding angles <35.degree. and then winding on to the reinforcing fibres at angles between .+-.80.degree. and .+-.90.degree. a peripheral winding of a material which is relatively resilient with respect to the reinforcing fibres and which has a high coefficient of thermal expansion. The tube so formed is then heat cured. Fittings are secured to the ends of the tube and the ends may be reinforced with a carbon fibre structure.

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: The invention relates to a method and an apparatus for the manufacture of high-pressure hose composed of a plastic core and a plurality of layers of helically wound plastic-resisting members formed in particular of plastic wires of high tensile strength which are rewound in a rewinding device from a supply reel onto several working spools, and optionally of an outer cover made of a plastic material. An intermediate layer of plastic yarn is disposed between every two helically wound pressure-resisting layers. After being unwound, the wires necessary for the helically wound pressure-resisting layers are precoiled over a hardened edge in the rewinding device and then wound onto the working spool in the stretched state. In accordance with the preferred embodiment, precoiling is done, not in a stranding machine, during hose production, but one stage earlier, in the rewinding device, where the individual wires are rewound from a supply reel onto so-called working spools.

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 preformed radiator hose and a method of manufacturing such a hose are disclosed herein. A long length of an uncured hose is first fabricated by alternately wrapping layers of an uncured elastomer and fiber reinforcements around a straight mandrel. The uncured hose is then removed from the straight mandrel and cut into shorter segments. Each of these segments is then placed on a contoured mandrel having a shape corresponding to the intended configuration of the final hose and cured by heating. Although the fully cured hose does have a permanent shape, because of the unique arrangement of the reinforcements, etc., it has sufficient deformability to be easily slipped off the mandrel.

Abstract: Catheter for insertion into the cardiovascular system, and method of manufacturing the same. A helically wound ribbon of flexible material is imbedded in the wall of the catheter to provide a torsional rigidity which facilitates steering and turning of the catheter during emplacement. The stiffness of the catheter is controlled by varying the pitch of the helically wound ribbon.

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: Device useful as a heat exchanger for blood or as an apparatus in which blood may be treated or reacted with selected reactants. Device comprises hollow tubing which has plastic monofilament placed in a generally spiral configuration around its outer surface, said monofilament being in the form of continuous or discontinuous projections or ridges. Strands of wire may be substituted for the plastic monofilament. Hollow tubing having such plastic monofilament or strands of wire is also included.

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 torque transmitting catheter apparatus including a longitudinally pre-oriented thin-walled tubular substrate surrounded by a thin-walled reinforcing means comprising a flat wire braid wound over the substrate and held in place by a thin-walled tubular superstrate surrounding the reinforcing means and in contact with the substrate through the reinforcing means.

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: A flexible pipe comprises an inner supporting pipe (1) made from an elastic material, onto which inner supporting pipe a shaped strip (2) is wound. Said strip (2) has a cross-section profile formed by two stepwise conjugated quadrangular flanges (3) and (4), the height of each of the flanges being equal to a half of the height of the profile. The adjacent turns of the strip (2) partially overlap each other so that the upper flange (3) of one turn is superimposed onto the lower flange (4) of the other flange, and the ends of the flanges (3) and (4) are aligned. An interlayer (5) made from an elastic material is superimposed onto the power frame formed by the strip (2). At least one pair of reinforcing layers (6) and (7) formed by groups of power filaments (8) and (9) is disposed on said interlayer (5), said filaments being parallel to one another and wound in contrary at angles of from 0 to 20.degree. to the axis of the pipe.

Abstract: A pipe for transporting crude oil comprises a layer of polymeric material for containing oil within the bore of the pipe, the polymeric material being surrounded and supported by a reinforcement structure comprising high tensile reinforcement elements which are protected from corrosion by gases passing from the polymeric layer through the reinforcement structure. The reinforcement element may be provided with a protective sheath, for example of low permeability material or a material which possesses electrolytic action, or the reinforcement element may be embedded in a matrix of high permeability material such that a preferential path is provided for the passage of gases through the reinforcement structure.

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 heat-insulated hose for liquefied gases, in particular, liquefied natural gas, comprising an inner hose (5) resistant to cryogenic temperatures, a plurality of successive layers (7A, 7B, 7C) of heat-insulating material, for example, polystyrene foam, arranged around the inner hose (5) and an outer protective sheath (18) arranged around the outermost layer of heat-insulating material, wherein each layer (7A, 7B, 7C) comprises a helically wound strip (6A, 6B, 6C) of fibre material holding together a mosaic of blocks of the heat-insulating material.

Abstract: A flexible conduit has an undulating liquid tight inner tube portion and layers of metal reinforcing wound around the tube. The layers include a burst resisting layer adjacent the tube, then traction and pressure resisting layers, and an outer sheath. The undulations in the interior of the tube can be filled with packing or the tube can be lined with a spiral strip to lessen resistance to fluid flow through the conduit.

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 braided-wire sheathing for high pressure hose or the like composed of interwoven bundles of high tensile strength wire. Within each bundle, the longer wires are twisted helically about the shorter wires such that all of the wires are under substantially equal tension. The interwoven bundles are grouped in pairs in a two-over, two-under pattern, the two bundles in each pair being twisted in opposing rotational directions.

Abstract: A torque balanced cable for towing or suspending oceanographic instrumenton includes a data transmission core about which is wound a helically laid inner layer of load bearing strands formed of high tensile strength, low stretch aramid fiber and having a selected pitch angle, pitch diameter and strand thickness. An outer composite layer is contrahelically wound about the inner layer and an interposed, abrasion resisting barrier film layer, and includes alternating load bearing strands and non-load bearing filler strands, the other load bearing strands having the same degree of pitch angle and thickness as the inner strands and of a number that bears substantially the same ratio to the number of inner strands as the pitch diameter of the inner layer bears to the pitch diameter of the outer layer.

Abstract: An anti-holiday cable armor for submersible electrical cables comprising two generally helically wrapped, overlapping metal straps, the second metal strap being wrapped longitudinally in a direction opposite to the direction of wrap on the first metal strap, for providing anti-holiday protection when the cable is pulled in either direction is disclosed.

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: A flexible wire-reinforced polymeric hose and method of making same are provided wherein such hose has a tubular core comprising a first polymeric tube, a tubular fabric layer disposed against the first tube and defined by a helically wound knitted fabric ribbon, and a second polymeric tube disposed against the tubular fabric layer and defined by a helically wound polymeric tape with the first and second polymeric tubes cooperating with the said tubular fabric layer to define the tubular core and hose having improved flexibility yet being capable of withstanding high fluid pressures within the hose.

Abstract: A hose that will withstand pressure and vacuum as well as resist kinking or collapsing in which the wall structure includes at least two radially spaced layers of monofilaments of textile material with a layer of elastomeric material separating the layers. Also at least one additional layer of a fabric of aramid fiber is included in the wall as additional reinforcement. Construction is of relative lightweight and may be readily adapted to a floating hose construction.