Abstract: A back-washable, candle filter element has a center tube with a closed peripheral wall surrounded by a plurality of perforated tubes. A head part has bores and a seat and receives a pressure control arrangement located between the bores. The bores establish a direct link between the top openings of the perforated tubes and the central tube for increasing a filtration power in a controlled manner, and for back-washing and drying a filter cake in a controlled manner.

Abstract: A conduit lies on the inside wall of the tubing. A plurality of anchors are located along the length of the conduit, the anchors being activatable between an "active" state when the anchors engage the inside wall and a "neutral" state when the anchors are disengaged from the inside wall.

Abstract: The invention concerns a dimensionally stable, elastically bending plastic coaxial tube for fluids, consisting of an outer tube and of at least one inner tube mounted in said outer tube in hermetically fluid-tight but separate manner, said inner tube being held in position in essentially coaxial manner relative to the said outer tube by means of spacers between, and integral with, the constituent tubes, each spacer being integral with only one of the constituent tubes and being so configured and arrayed that the outer tube and the inner tube are freely axially displaceable relative to each other at least to some limited extent.The coaxial tube is manufactured in that the inner tube is prefabricated, in particular by extrusion, and in that the outer tube is molded in-situ around the cooled inner tube, in particular by coaxial sheath extrusion.

Abstract: This modular element has several conduits disposed side by side, each pair of adjacent conduits being interconnected to form a rigid or flexible unit, each conduit has a male end and an opposite female end, the latter for joining with the male end of an aligned conduit of an adjacent modular element. The several conduits of a first modular element can therefore be simultaneously extended by the several conduits of a second modular element by simultaneously joining the female and male ends of the elements. These elements can be in the form of panels to be joined together to form, for instance, a solar panel or a floor covering with a circulating heat transfer fluid through the conduits. The conduits may also serve as protected passages for underground electrical wires. The conduits may be provided with sprinkler holes to water plants.

Abstract: A composite pipe suitable for advanced gas distribution is formed of a first elastomeric resin impregnated outer felt tube reinforced longitudinally, and a second inner felt tube impregnated with an uncured resin which is more rigid than the elastomeric resin and coated on at least the inside surface with a styrene resistant gas impermeable layer and reinforced in the longitudinal and radial directions. The inner tube has a nominal outside diameter greater than the nominal inside diameter of the outer tube. After installation the inner tube is pressurized to expand the outer tube and the uncured resin is cured activating the heat sensitive to bond the two tubes together and cure the pipe with the outer tube in the expanded condition.

Abstract: System for vapor recovery without formation of fluid blockages includes a vapor source, a fluid collection tank for collecting vapor, and a vapor recovery pipe extending between and fluidly collecting the vapor source and the fluid collection tank. The vapor recovery pipe slopes vertically downwardly from the vapor source to the fluid collection tank so that vapor flows into the fluid collection tank. The vapor recovery pipe has a main tube and an auxiliary tube disposed adjacent to the main tube. The vapor recovery pipe is engineered and is installed in such a manner that the vapor recovery pipe resists bending in a substantially vertical plane and allows bending in a substantially horizontal plane. Accordingly, the vapor recovery pipe according to the invention can be installed without surveying equipment, overcomes surface irregularities, and by resisting bending in a vertical direction ensures that no fluid blockages are formed along the length thereof.

Abstract: A centering support for a double-containment piping assembly has a body portion including an inner surface defining a central aperture for receiving and supporting the inner pipe within the outer pipe, and the inner surface is defined by a first radius of curvature. A plurality of support lugs are spaced apart from each other and project outward from the body portion, and each support lug defines an outer support surface for contacting the outer pipe. The support lugs also define corresponding recessed surfaces extending between adjacent support lugs, and each recessed surface is defined by a second radius of curvature substantially concentric with the first radius of curvature.

Abstract: The invention describes a device for transporting materials which has at least a first pipe (I) and a second pipe (II), each having a six-cornered, honeycomb-shaped flow cross section, the first pipe (I) having at least two first wall parts (1) which are not arranged adjacent to one another and whose longitudinal edges (1') are arranged at a first distance (a) from the connection point (3) between the first wall part (1) and the adjacent second wall part (2), which connection point (3) is nearest to the longitudinal edge (1'). Plate-shaped brackets (4) are arranged at the sides of the first wall parts (1) remote of the materials to be transported at a second distance (c) from the nearest longitudinal edge (1'). The angle (.alpha.) of inclination between the plane of the bracket (4) and the plane of the first wall part (1) is 60.degree., and the second pipe (II) has at least one corresponding first wall part (1) which is arranged parallel to the second wall part (2) of the first pipe (I).

Abstract: An electrostatic separator is described which includes honeycomb collecting electrodes, which consist of star-shaped elements, wherein each star-shaped element consists of three wall parts (1, 2, 3), which are centrally joined and extend at an angle of 120.degree. to each other, at least one tube section (1', 2', 3', 5', 6') extends along the outer edge of each wall part, the tube sections (2', 5', 6') of any two adjacent star-shaped elements are arranged one over the other and adjacent star-shaped elements are connectted by a connecting rod (4), which extends in the tube sections (1', 2', 3', 5', 6') of at least two adjacent star-shaped elements.

Abstract: A hose designed to facilitate supply and return of cryogenic fluid such as a liquefied gas includes supply and return conduits wrapped in multiple layers of reflective metallized material, which is surrounded by a layer of foam material which is, in turn, surrounded by a protective outer layer such as, for example, a woven cover. The conduits are made of a material such as polytetrafluoroethylene. The inventive hose is lightweight and maintains flexibility for extended periods of time with cryogenic fluid flowing through the conduits.

Abstract: A flexible hose construction and method of making the same are provided, the flexible hose construction comprising an inner tube made of polymeric material, an outer sleeve of reinforcing material disposed in telescoping relation on the inner tube from one end thereof to the other end thereof, rib structure disposed between the sleeve of reinforcing material and the inner tube, the rib structure being disposed on the inner tube so as to define alternating coil structure of rib structure and coil structure of non-rib structure serially along the longitudinal axis of the inner tube in a like repeating pattern thereof, the coil structure of non-rib structure comprise coil structure of void space, and an outer tube of polymeric material disposed between the rib structure and the sleeve of reinforcing material so as to extend in a generally straight-line manner from coil structure of the rib structure to coil structure of the rib structure so as to tend to prevent the sleeve of reinforcing material from entering i

Abstract: A flexible subsea line includes a number of longitudinal elements including fluid/gas conducting tubes enclosed within a common outer cover. A number of the tubes are made of steel and each of these steel tubes is in longitudinal electrical contact with at least two sacrificial anodes.

Abstract: A system for conveying a fluid through an under-the-ground location and method of making the same are provided, the system comprising a primary flexible conduit for conveying the fluid therethrough and having an outer peripheral surface and an inner peripheral surface, and an outer secondary conduit having at least a portion of the primary conduit removably disposed therein and having an inner peripheral surface and an outer peripheral surface that engages the ground in the under-the-ground location thereof, the secondary conduit having the inner peripheral surface thereof comprising a helically disposed and inwardly directed projection thereof that engages the outer peripheral surface of the primary conduit in a spiral manner and cooperates therewith to define a helically disposed passage that extends therebetween throughout substantially the entire engagement area thereof.

Abstract: For the transportation of a fluid such as a methanol or glycol there is provided a multi-conduit umbilical (20) having a conduit which comprises a hose (10,21,22) having a lining layer (11) of polyethylene, for example cross-linked polyethylene, arranged to restrain permeation of fluid from the bore of the hose (10,21,22).

Abstract: A multiple-layered, translatedly rib-stiffened, composite hollow cylinder d method for fabrication thereof utilizing filament winding techniques known in the art. An inner skin is wound over a mandrel; then, circumferential ribs are wound over the inner skin, pin rings are placed at the axial ends of the mandrel, longitudinal stringers are engaged with the pin rings and wound over the circumferential ribs, circumferential bands are wound near the axial ends over the longitudinal stringers, and another skin is wound over the circumferential bands and longitudinal stringers; these steps, commencing with the winding of circumferential ribs and concluding with the winding of an additional skin, are repeated as many times as desired, each repetition forming an additional layer, with the circumferential ribs for each additional layer being longitudinally staggered in relation to the circumferential ribs for the previous layer.

Abstract: A multiple hose assembly including a plurality of hose portions which are disposed in a first direction in a substantially parallel and a substantially planar arrangement. In addition, the multiple hose assembly further includes a plurality of support members for securing the hose portions in the substantially parallel and the substantially planar arrangement. The support members used for securing the hose portions are disposed in a second direction which is different from the first direction.

Abstract: Various embodiments of flexible plastic tubing are disclosed for connection to an endoscopic instrument having suction, irrigation and electrocautery capabilities, with the electrocautery capability requiring connection to an electrical wire. Generally, the tubing is an integral, extruded flexible plastic tube having a first suction portion with a first interior cylindrical passageway, a second irrigation portion with a second interior cylindrical passageway, and a third portion with a third passageway for the electrical wire. The third portion joins the other portions. The third portion has a substantially cylindrical interior passageway with first and second flexible lips defining a peripheral opening which is narrower than the electrical wire such that the electrical wire is inserted past the lips and held in the passageway and is removable from the passageway.

Abstract: A conduit tube is arranged to include intersecting partition walls dividing the associated conduit tube into four compartments to permit transport and positioning of cable within each compartment in a discrete relationship. The first and second ends of the conduit tube include locking blades, with each locking blade arranged for reception within an associated slot of a second tube member to secure a plurality of the conduit tubes together.

Abstract: A flexible hose construction and method of making the same are provided, the flexible hose construction comprising an inner tube made of polymeric material, an outer sleeve of reinforcing material disposed in telescoping relation on the inner tube from one end thereof to the other end thereof, rib structure disposed between the sleeve of reinforcing material and the inner tube, the rib structure being disposed on the inner tube so as to define alternating coil structure of rib structure and coil structure of non-rib structure serially along the longitudinal axis of the inner tube in a like repeating pattern thereof, the coil structure of non-rib structure comprise coil structure of void space, and an outer tube of polymeric material disposed between the rib structure and the sleeve of reinforcing material so as to extend in a generally straight-line manner from coil structure of the rib structure to coil structure of the rib structure so as to tend to prevent the sleeve of reinforcing material from entering i

Abstract: A cable-guide assembly of particular utility in ground subsidence regions consists of three tubes extruded simultaneously with the connecting webs and abutting at hexagonal segments form with two angularly adjoining surfaces. A subsequently applied sealing strip or a sealing strip formed on one of the tubes not interconnected by a connecting web can bridge between the two tubes which are not interconnected by such webs when the bundle is formed.

Abstract: Improved equipment for supporting a length of flexible drainage hose or piping to extend along a substantially uniform gradient that includes the combination of an open ended flexible tubular element or sleeve for receiving and supporting therein the intermediate segment of a selected drainage hose or piping, with a length of cord or line aligned with and carrying the flexible tubular element or sleeve depending therefrom and therealong. The respective ends of the cord or line extend beyond the respective open ends of the tubular element or sleeve for securing the cord or line in sufficiently taut relation and in an orientation to establish a substantially uniform gradient for the supported length of flexible drainage hose or piping.

Abstract: A method and apparatus for replacing an individual conduit located within a bank of individual conduits, without rendering inoperable the surrounding adjacent individual conduits of the bank. A conduit expander is pulled through the subject individual conduit to break it and push the pieces out. Knife blades may be used to split the individual conduit. A rearward flared out portion pushes the broken conduit outwardly far enough for a new conduit to be moved therethrough, but not far enough to render inoperable the surrounding adjacent individual conduits of the bank. A replacement conduit is attached to the rear end of the conduit expander and moved into the individual conduit as the conduit expander moves therethrough.

Abstract: A readily-removable protective modular enclosure (50) houses a plurality of utility conduits (42) which bridge a zoned annular volume (40) disposed between a turbine engine's core (20) and fan case (30) zones, the bridging utility conduits (42) completing a three-zoned wiring harness originating on the engine's fan case (30) and terminating at a plurality of engine core terminals (24). The enclosure (50) also houses a branching interface (70) through which a utility flow, originating at either the fan case (30) or engine core (20), is directed to a dedicated outgoing utility conduit (32, 22) which services a specific zone (100).

Abstract: A method of fabricating a bundle-like pipe unit using a blow molding machine having a plurality of heads feeding parisons into a molding die comprises the steps of forming a plurality of hollows independent from each other in the molding die, forming one or more channels connecting the hollows to each other laterally, feeding the parisons into the hollows from the respective heads of the blow molding machine, and blowing air into the parisons in a manner such that a plurality of independent pipes are molded in the respective hollows and the pipes are joined with each other at the lateral walls thereof by the parisons which are forced into the channels upon air blowing. Suction forces are preferably applied on the parisons when the parisons are fed into the hollows of the molding die. The pipe unit thusly fabricated is light in weight and possesses flexibility as well as anti-corrosion properties due to the characteristics of the parisons.

Abstract: A transfer boom adapted for suspension from a reciprocal shuttle carriage comprises a boom arm having a plurality of interior passages extending the length of the boom arm. These passages define air passages, thereby eliminating the need for exterior hoses. A T-shaped cavity is provided within the exterior walls of the boom arm. A boom mount, having Venturi cups or grippers is detachably mounted to the boom arm within the T-shaped cavity by a T-bolt. This enables the boom mount to be mounted anywhere along the length of the boom arm. The T-bolt provides for easy removability of the boom mount from the boom arm.

Abstract: A spiral-wound tube formed of a hollow section 1 is provided wherein the hollow section is joined together by extruder welding or gluing. The hollow section is coextruded and comprises an outer layer (2) of pastic with a homogenous surface and good weldability. An intermediate layer 3 is provided of a modified polymer and an inner layer (4) is also provided. The interior space defined by the tubular layers (2, 3, 4) is preferably rectangular in cross-section.

Abstract: In a coaxial piping system for the transport of toxic and hazardous gases having an inner conduit wherein hazardouses gases are transported therethrough and having a spacer helically wound about the inner conduit within a volume between the inner conduit and an outer conduit.

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: An array of octagonal extruded plastic tubes connected by flexible webs is folded to form a tube bundle with flat surfaces of the outer octagonal periphery of each tube engaging flat surfaces of two other tubes so that four flat surfaces of the tubes define a square cross section central space for receiving cabling.

Abstract: An extruded buckling-resistant longitudinally insertable drain or venting hose of PVC or a similar thermoplastic material which can be mounted in inaccessible hollows of a conveyance, especially a motor vehicle body, has longitudinally-extending radial ribs coextruded with the PVC body and composed preferably of chlorinated polyethylene. As a result, the hose has improved sound-damping properties and can be more readily inserted into place.

Abstract: A conduit assembly for cabling has a multiplicity of plastic tubes with outer polygonal cross sections having more than three sides and is intended for direct insertion in the ground in a compact bundle in which there is practically no free space which can serve for water drainage. The tubes are connected with webs which are flexible and are so oriented that they are linearly aligned in an open array of the tubes so that the tubes are coplanar and can be coiled or coiled onto a drum or uncoiled from a drum.

Abstract: Side rail structure for trenchduct side rail has a lower section and an upper section. The lower section is thin, galvanized sheet steel and the upper section is an aluminum extrusion clamps connect the upper and lower sections so that in a full bottom trench the whole trench can be adjusted. In both full bottom and bottomless trench, the upper section can be adjusted with respect to lower section. In the full bottomless trench a friction fit holds upper and lower sections together.

Abstract: A ground drainage system includes a relatively narrow, elongated trench disposed along a roadway (or agricultural field); and a drainage tube construction disposed in the trench. The tube construction including a plurality of longitudinally extending, substantially tangential and generally parallel corrugated tubes oriented with respect to one another in a linear fashion. In transverse cross-section the portions attaching the tubes to another define a generally straight line perpendicular to the longitudinal dimension of the tubes. The tubes are generally vertically stacked with respect to one another. The corrugations are defined by alternating ribs and valleys. Each tube has perforations in the valleys to allow fluid to enter therein and be drained away.

Abstract: Two concentric corrugated metal tubes have a space therebetween in which there is arranged a superinsulation layer. Between the inner tube and the superinsulation layer there is located a helical spacer to ensure an annular channel to facilitate the evacuation of the space between the corrugated tubes. The spacer is formed of interlaced strands to reduce heat conduction therethrough.

Abstract: An extruded conduit structure for conveying several different fluids is provided comprising a cluster of at least three tubes connected by webs extending between adjacent pairs, the tubes and webs being formed by simultaneous extrusion of a suitable plastic through a suitable die. The outer surface of each of the webs is convexly curved in an arc that is substantially tangential with the outer surfaces of the adjacent pair of tubes. The inner surface of each of the webs is flat relative to the outer surface and forms a cord of such arc whereby each of the webs will be of minimum thickness along each of its junctures with the adjacent webs.

Abstract: A transition pipe for location between an afterburner pipe and a jet nozzle in a jet pipe assembly for a turbojet engine comprises a funnel shaped inner casing tapering downstream from a circular section at its upstream end to a quadrangular section at its downstream end, a horn shaped outer casing surrounding the inner casing and flared downstream from a circular upstream end section to a downstream end section formed of four joined segments of generally parabolic shape, and a plurality of peripherally spaced, longitudinally extending stiffeners interconnecting the inner and outer casings in the space therebetween.

Abstract: A composite hose for heavy-duty purposes is disclosed which is essentially comprised of a flexible main hose of increased diameter and a subhose disposed longitudinally thereover. The subhose has a reinforcing layer oriented at a specified angle to thereby dilate widthwise upon application of pressure, allowing the main hose to readily bend in a predetermined direction.

Abstract: A double-containment thermoplastic pipe assembly is provided to prevent against potentially hazardous spills or leaks of chemicals and the like. The double-containment pipe assembly comprises a containment pipe and at least one carrier pipe disposed therein. The carrier pipe is retained in spaced relationship to the containment pipe by support clips with outwardly extending radially aligned legs. Restraint couplings may be disposed at selected locations along the double-containment pipe assembly. The restraint couplings include a carrier portion, a containment portion and a connecting portion extending therebetween. Double-containment pipe fittings also are provided to ensure complete double-containment protection throughout an entire double-containment pipe assembly.

Abstract: A multiple conduit flexible drainage device in which the adjacent conduits are joined by a plurality of membranes and may be parted from their proximal ends, reliably and without damage to the conduits.

Abstract: An apparatus for collectively fixing a plurality of pipes (e.g, metallic pipes, resin tubes, etc.) with a relatively small diameter, each having a bent portion, by means of a plate-shaped clamp member having a sectorial clamping wall portion having a substantially U-shaped cross-section and a mounting wall portion which is secured to a base member, the mounting wall portion being formed by diametrically extending one end portion of one side wall of the clamp member, so that the bent portions of the pipes which are disposed side by side within one plane are clamped in a lump by means of the clamping wall portion in such a manner that the bent portions are snugly engaged with the circularly curved portion of the clamping wall portion, thus effectively and reliably fixing the pipes in a lump without any fear of the fixed pipes being displaced axially or circumferentially or being collapsed.

Abstract: An electrical household appliance for steam cleaning comprises, within a monocoque body, a steam generator having a boiler and a steam delivery conduit extending from the boiler, a suction device arranged to draw fluids including an electrical aspirator, a container for collecting the matter drawn, and a hose assembly including a suction conduit and a sleeve in the wall of the conduit containing the steam delivery conduit.

Abstract: An underground support device is provided for supporting an underground pipe or cable within the encasement sleeve of a horizontally bored hole. The support device includes a round collar having two resiliently spaced-apart ends which can be urged together to secure the device to the underground pipe or cable. A plurality of equidistantly spaced-apart and outwardly extending support legs are provided around the circumference of the collar which terminate in an elongate foot having opposing ends inclined inwardly toward the collar. Each foot extends generally parallel to the longitudinal axis of the collar and has a greater length than the longitudinal length of the collar to facilitate placement and support of an underground pipe or conduit within the encasement sleeve of the underground hole.

Abstract: Multi-lumen tube arrangement for use in a sliding-seal-free centrifuge comprising a plurality of equilength individual tubes (12, 14, 36, 38, 40, 42) which after a twisting about the longitudinal axis of the tube arrangement (10) are each held fixed free of tension at their ends (16-18).

Abstract: The irrigation hose comprises two tubes disposed one within the other, at least one of the tubes being grooved. The ungrooved tube forms with the groove or grooves of the other tube continuous secondary ducts over the entire length of the hose. Inlet ports and outlet ports delimit in the secondary ducts sections of a predetermined length, each yielding a flow capable of continuously drip-irrigating a plant in the area to be irrigated. The outlet ports and the inlet ports are distributed along spiral lines if the secondary ducts are straight and along straight lines constituting generatrices of the hose if the secondary ducts run along spirals.

Abstract: An assembly for the coupling of a multi-duct conduit system for sealing the outer and inner ducts of adjacent conduit sections in end to end relationship. There is provided a primary coupling housing which includes preferably a premolded body portion which is insertible into the outer most housing of a ducted system. The body system in the body portion comprises first and second half body portions. Each first and second half body portion is adapted to receive a plurality of ducts into bores in the body housing so that a first plurality of ducts enters and is insertible into the body portion at a first end and the second adjoining plurality of duct members are insertible into the body portion on the second end, the first and second portions of ducts being slidably engaged into the body portion and meeting substantially at a center point within the body portion, for defining a continuous pathway within the ducts for housing transmission lines therewithin.

Abstract: A tubing set, the major portions of which are defined from a trilumen section of tubing, comprises three lines including an inflow line, an outflow line and a pressure sensing line. The inflow line includes a header portion engageable about the rollers of a peristaltic pump, a delivery tube mounting a male luer fitting for engagement with a patient cannula, and a pair of clampable supply tubes with bag spikes for communication with saline bags. The pressure sensing line includes a pressure transmitting elongate tubular diaphragm mounted within a fluid chamber directly adjacent the patient end of the line. The pressure transmitting diaphragm communicates with an elongate dry or air tube which, at the remote end, communicates with an appropriate pump-mounted pressure transducer or the like.

Abstract: A fluid handling duct for an automotive vehicle has a channel section having a base and integral, upstanding interior and exterior wall elements and a closure cap which is friction welded to each of the wall elements. The closure cap has several V-shaped projections depending therefrom which are sized such that during friction welding according to the method disclosed herein the wall elements contacted by each of the V-shaped projections will be deflected in a direction transverse to the longitudinal axis of the duct whereby the V-shaped projection and a corresponding wall will be held together with a force of deflection having sufficient magnitude to cause welding of the V-shaped projection to the wall when the closure cap is moved relative to the channel section during friction welding.

Abstract: A conduit liner assembly for use in the installation of a series of fiber optics cables in an existing conduit. The conduit liner assembly includes a plurality of individual chambered inserts each having a central chamber and connected one to another in bundled engagement such that each of the inserts is longitudinally moveable individually with respect to each of the inserts adjacent thereto. Also provided is a method for installation of a conduit liner assembly in an existing conduit including the steps of connecting a group of separate tubular inserts together into a loosely held bundle wherein the separate tubular inserts are longitudinally moveable with respect to one another when connected. The bundle of inserts is next pulled through an existing conduit at a suitable access point in the conduit. The bundle is separated at the access point into separate tubular inserts. A pulling force is the applied to each of the separate tubular inserts.

Abstract: A fluid flow device is disclosed wherein fluid flows from an outer conduit to an inner co-axial conduit through a communicating chamber at one end of the conduits. To prevent turbulence in the fluid flow due to the change of axial direction, vanes are provided, some of which extend into the communicating chamber. Some of the vanes may extend continuously from the outer conduit through the communicating chamber to the inner conduit. A flow straightener may also be provided downstream of the vanes in the inner conduit.

Abstract: An assembly for the coupling of a multi-duct conduit system for sealing the outer and inner ducts of adjacent conduit sections in end to end relationship. There is provided a primary coupling housing which includes preferably a premolded body portion which is insertible into the outer most housing of a ducted system. The body system in the body portion comprises first and second half body portions. Each first and second half body portion is adapted to receive a plurality of ducts into bores in the body housing so that a first plurality of ducts enters and is insertible into the body portion at a first end and the second adjoining plurality of duct members are insertible into the body portion on the second end, the first and second portions of ducts being slidably engaged into the body portion and meeting substantially at a center point within the body portion, for defining a continuous pathway within the ducts for housing transmission lines therewithin.