Abstract: A vacuum cleaner hose assembly, a flexible hose therefor and methods of making the same are provided, the hose assembly comprising a flexible hose having a cuff end and a tubular tool part having an end telescoped in the cuff end and being locked therein while being rotatable relative thereto, the cuff end having a pair of axially spaced apart and inwardly directed annular convolutions provided with like facing sides, the end of the tool part having a pair of axially spaced apart and outwardly directed annular shoulders respectively engaging the sides of the annular convolutions to tend to lock the end of the tool part in the cuff end of the hose, the cuff end of the hose having an annular structure interconnecting the pair of convolutions together, the annular structure of the cuff end of the hose being annularly spaced outwardly from the tool part so as to be out of engagement therewith from one of the convolutions to the other of the convolutions.

Abstract: A device for interconnecting drainage conduits that have been stabilized while forming building footings includes an annular disk and a cylindrical hub extending outwardly from and about the opening. A stop formed in the hub limits the insertion of the drain tile. A nub on the cylindrical hub prevents lateral movement of the device when the footing forms are removed. Breakaway fasteners are used to hold the device to the footing form. Drainage connectors interconnect with other conduit and connectors connected to other devices to form a network for routing moisture to a desired located.

Abstract: A connector for delivering combustion gas to a gas fired appliance from a stationary supply line where the appliance moves toward and away from the supply line with the connector straightening and flexing between them as the appliance moves. The connector comprises a flexible hose assembly and first and second swivel fittings at respective hose assembly ends. Each swivel fitting defines a gas flow path and comprises a swivel member for communicating the connector with the appliance or the supply line. The hose assembly comprises a flexible metal hose member antitorsion fittings forming ends of the hose assembly connected to respective swivel fittings. The antitorsion fittings comprise pintle and nipple members rotatable relative to each other to prevent torsional stress in the hose member when the appliance moves relative to the supply line.

Abstract: A flexible metal piping assembly includes a body with corrugations having spiral (helical) or annular configurations. End connections are mounted on the body ends, which can be flanged or male-threaded. A layer of insulating or sealing material can be applied over the body. The end connections can be male-threaded or female-threaded. A bellows configuration is provided with annular corrugations which taper in proximity to the body ends.

Abstract: A hose coupling for use with flexible hose comprises a biconical fitting which is inserted into a hose end and a frusto-conical locking sleeve located about the hose portion which grips the rearward conical section of the fitting. Sealing arrangements for specific embodiments of hose are disclosed. The double included angle of the conical portion of the sleeve and fitting, which engages the hose, is between one degree but less than ten degrees.

Abstract: A pipe joint for connecting a corrugated spiral pipe includes an annular projection formed on the axially central portion, a spiral projection bonded on a portion on one side of this projection so as to engage with the spiral pipe, compressible and transformable ring-like sealing bodies bonded on the inner circumferential surfaces on the both sides of the spiral projection, and a small hole for injecting a hardening liquid agent and formed in a portion between the sealing bodies so as to penetrate the portion. A corrugated spiral pipe provided with a joint has the above mentioned joint fitted onto a pipe end of the spiral pipe, and is produced by filling a space portion between the ring-like sealing bodies with a hardened matter of a hardening liquid agent, so that the joint is water-tightly coupled with the pipe end of the spiral pipe.

Abstract: A pipe joint incldues joint main body having securing through holes respectively formed at positions spaced apart from the two ends of the joint main body by a given distance in the longitudinal direction thereof for securing hook portions, and a plurality of flange bodies each including hook portions respectively formed on one end side thereof to be inserted and secured to the respective securing holes and a flange portion formed on the other end side thereof and having a connecting hole.

Abstract: A pipe joint for connecting a flexible corrugated tube includes a joint body, a sleeve received in an axial through bore in the joint body for holding a free end of the flexible corrugated tube, and a nut threadedly fitted in a threaded portion of the joint body. A shoulder is formed on an inner surface of the through bore, and has an air-tight surface directed toward one end of the through bore. A tapering surface, decreasing in diameter progressively toward the shoulder, is formed on the inner surface of the through bore in adjacent relation to the shoulder. An annular groove of a generally channel-shaped cross-section is formed in the inner surface of the through bore in adjacent relation to the tapering surface. The sleeve has projections extending radially inwardly from one end thereof facing said shoulder, the sleeve having an end surface at the other end thereof.

Abstract: A corrugated pipe has a solid joint which is formed fixedly on an end portion of the pipe by polymerization and solidification of a reaction solution which polymerizes quickly at room temperature in such a manner that the joint has a first cylindrical portion which has a first predetermined length from the end of the pipe in the axial direction, or the first cylindrical portion and a second cylindrical portion which is elongated axially outwardly from the first cylindrical portion to a second predetermined length. The first or second cylindrical portion has a locking mechanism such as an annular groove or flange which is so formed as to detachably connect the joint to the joint (H) of another mating corrugated pipe.

Abstract: A hose coupling for use with flexible hose comprises a biconical fitting which is inserted into a hose end and a frusto-conical locking sleeve located about the hose portion which grips the rearward conical section of the fitting. Sealing arrangements for specific embodiments of hose are disclosed. The double included angle of the conical portion of the sleeve and fitting, which engages the hose, is between one degree but less than ten degrees.

Abstract: A coupling for a corrugated pipe having ridges and grooves arranged alternately is disclosed. A body of this coupling has a through-hole whose one end is served as an inlet port. An annular accommodation recess and an annular retainer portion are formed on an inner periphery of the through-hole in this order toward the inlet port. A cylindrical support member is accommodated within the body. The support member is urged toward the inlet port by a spring. One end portion of the support member on the inlet port side is served as a receiving portion. An annular engagement member is mounted on an outer periphery of this receiving portion in such a manner as to be elastically enlarged in diameter.

Abstract: An apparatus for attaching and securing a drain hose to the adapter used with a recreational vehicle ("RV") waste drain assembly or, at the opposite end of the hose, to a sewer fitting used in conjunction with a septic tank or some other type of in or above ground sewer system for receiving drained waste matter. The apparatus comprises a retaining ring, which may include an annular flange formed along one edge, slidably mountable inside the opening at one end of a RV drain hose, for retaining the shape and requisite diameter dimension of the end section of the hose to facilitate its engagement with the adapter or the sewer fitting when those connections are made. The ring is removed before the adapter or the sewer fitting engages the hose opening to enable the hose to contract and form a tight seal with those components.

Abstract: A corrugated spiral pipe with a joint is formed by the steps of winding a seal material on thread portions of a pipe end of a spiral pipe, fitting a part of a cylindrical joint body to the pipe end so as to cover a portion on which the seal material has been wound, injecting a liquid foamable resin material through an injection hole and letting it foam, and filling a trough portion of the spiral pipe with the foamed resin material so as to make the spiral pipe watertight for coupling purposes. When the spiral pipe with the joint is coupled to another spiral pipe, a waterstop is forced into a trough portion of a pipe end portion of the latter pipe, an elastic seal ring is fitted onto an outer peripheral face of the latter pipe, and the pipe end of the latter pipe is forced into an outward protruded portion of the joint body.

Abstract: A length of corrugated tubing is (B) inserted into a bell (C) having an open end 42. The corrugated tubing is defined by alternating annular portions peak (22) and valley portions (24) and a cylindrical inner wall (26) connected with an inner surface of the valley portions. Annular chambers (28) are defined between the cylindrical inner liner and each peak portion. The bell has a stop (10) and a cylindrical side wall (40) with a groove (44) for receiving a gasket (30) that is disposed in one of the tubing valleys. The groove is constructed an integer number of peak and valley portions from the stop such that the gasket aligns with the groove when an end of the tubing length abuts the stop. A plurality of latch elements (60) are disposed an integer number of peak and valley portions from the gasket receiving groove toward the bell open end. The latch elements extend into another of the valley portions and engage a corrugation side wall to transfer axial uncoupling forced from the tubing to the bell side wall.

Abstract: In a housing (3) of an attachment piece (1), at least one hollow core space (5) for receiving one end of a corrugated tube (2) is available. In this hollow core space (5) between the corrugated tube (2) and the housing (3), a sleeve (4) is disposed into which the end of the corrugated tube (2) is inserted. On this sleeve (4) elastic elements (15, 16) are present which are pressed toward an axis (29) of the attachment piece (1), through an outer ring (23) on the housing (3). At least one of the elastic elements (15, 16) is equipped with one positioning element (20) and a locking element (24), with these elements (20, 24) engaging an aperture (21) in the housing (3). The connection between corrugated tube (2) and housing (3) can only be broken with an auxiliary tool and is therefore protected against unintentional detachment.

Abstract: A hose assembly having opposite ends and having a first fluid passage therein for conveying a volatile liquid in one direction from one of the ends thereof to a container adjacent the other of the ends thereof and a second fluid passage therein for returning the vapors of the volatile liquid fuel from the container to the one end thereof, the assembly comprising a flexible inner hose having an outer peripheral surface and defining one of the fluid passages therein, a flexible outer hose having an inner peripheral surface and an outer peripheral surface and being disposed around the inner hose, the inner peripheral surface of the outer hose and the outer peripheral surface of the inner hose defining the other of the fluid passages therebetween, the outer hose comprising a corrugated tube that has the corrugations thereof extending throughout the entire length thereof, and a cuff secured to one of the ends of the outer hose, the cuff covering the inner peripheral surface and the outer peripheral surface of that

Abstract: A profile gasket adapted for forming a seal in a joint between an annular band and annularly grooved ends of two pipes positioned end-to-end. The profile gasket comprises a sheet of elastomeric material having a bottom surface with at least two integrally molded and laterally spaced ridges running along its length.

Abstract: An end cap for a flexible hose is provided which includes a depending pivotable member attached to an outer wall. The pivotable member can be swung upwardly between the inner and outer walls of the end cap to secure the end of a flexible hose therein. The end cap is integrally formed such as by molding from a medium density polymeric material such as polyethylene.

Abstract: Joint formers for coupling between duct components having different cross-sections include a core having holes for fixing members and an opening provided with a hollowed out recess. In the opening there is formed at least one series of stepped spot-faced edges forming a series of cavities, each cavity rotated with respect to the others.

Abstract: A flexible piping and fitting assembly includes a section of flexible piping formed by spiral-winding a band with interlocking leading and trailing edges. The piping includes a bore. A fitting with a generally cylindrical inner section, an annular band an outer section in connected to the piping by spot-welding at multiple locations. The spot-welds can be circumferentially spaced and can extend through multiple layers of the flexible piping and into the fitting.

Abstract: A coupling for a corrugated conduit has a body with a rotatable retaining ring. The ring has inwardly-projecting locking bars with two finger grips which project outwardly through slots in the body. When the finger grips are held and the ring is rotated, the locking bars are displaced inwardly to lie between adjacent corrugations of the conduit and retain it in the coupling.

Abstract: A jointing device, which permits quick connection and disconnection of a corrugated flexible conduit, comprises a joint body having a cylindrical connector section for receiving the conduit, the connector section being formed with receive holes arranged circumferentially thereof, and a clasp axially slidably mounted on the joint body. The clasp has an outer cylinder axially slidably fitted on the connector section and covering the receive holes formed in the connector section, an inner cylinder slidably fitted into the connector section for receiving the conduit, and locking members connected at their respective fixed ends with the inner cylinder. The outer and inner cylinders are connected with each other. The locking members each have a free end portion thereof formed with a claw engageable with and disengageable from the conduit. The free end portion of each locking member is received in a corresponding receive hole when the free end portion is pushed radially outward by the corrugated flexible conduit.

Abstract: A device serving as a coupling between a flexible pipe conduit (1) installed underneath plaster and a fitting arranged above the plaster comprises a casing (4, 5a, 5b, 6) and a pipe elbow (3) insertable in the casing (4, 5a, 5b, 6) and fixable therein. The casing is fashioned so that the pipe elbow can be connected to the pipe conduit (1) in two different ways. In one type of mounting, the inner pipe (1) is bent out of the wall, the pipe elbow (3) is attached thereto, and the entire arrangement is then placed into the casing (4). In the second type, the pipe conduit is connected to the pipe elbow (3) which latter is inserted in the casing head (4) and attached therein. The casing neck consists of two half shells (5a, 5b) encompassing the clamping ring closure (10) projecting in the downward direction from the casing head (4), as well as a section of the pipe conduit (1 ). The casing neck fixedly clamps the outer pipe (2) in place and thereby prevents slipping out of this outer pipe.

Abstract: A fitting or connecting corrugated tubing has a through opening and a liquid tight corrugated tubing connecting portion. The connecting portion has a shank to receive the corrugated tubing and a collar of greater diameter than the shank. The collar extends along the shank from a shoulder in the fitting and terminates before the end of the shank. Pawls in the connecting portion extend from the shank between the collar and the end of the shank. The pawls are hinged and have bevels and a bearing surface. The collar on the shank has an outside diameter slightly greater than the inside diameter of the corrugated tubing which renders the connector liquid tight when engaged with the corrugated tubing. The pawls resiliently extend to engage themselves in an inner corrugation of the corrugated tubing. Various pawl configurations engage the inside corrugations of corrugated tubing for a quick and firm liquid tight connection.

Abstract: A flexible pipe connector is disclosed for connecting to a hard plastic pipe. The flexible pipe connector, preferably made of polyethylene, has a tubing member which defines a cylindrical wall with inner and outer surfaces, the cylindrical wall having a male end which has a plurality of undercuts formed on the outer surface. The male end with the undercuts is inserted into the female end of a hard plastic pipe with a solvent weld glue applied at the inner surface thereof. The solvent weld glue liquifies the inner surface of the pipe's female end to form a liquified layer of hard plastic which is received in the male end's undercuts and then hardens into a reconfigured solid layer. In this manner, the flexible pipe connector, which is inert and normally cannot be attached with glue to a hard plastic pipe, can be sealably secured to a hard plastic pipe as the liquified layer solidifies within the undercuts to prevent separation of the pipe connector and the hard plastic pipe and to provide a seal therebetween.

Abstract: A flexible pipe connector is disclosed having two female ends, each for receiving a length of corrugated pipe and creating a gravity flow water-tight seal between the two lengths of corrugated pipe. The flexible pipe connector is made of flexible, stretchable plastic material, with each female end having a receiving length with a mouth at a first end thereof and a stopping flange at a second end thereof. Each female receiving end is constructed to stretch radially outward along a substantial length of the corrugated pipe which is inserted into the mouth and receiving length, such that the receiving length exerts radially inward compressive forces against the outer diameter of the corrugated pipe effectuating a gravity flow water-tight seal. The invention also includes a male-to-female form of connector having a female end and a male end, which coupler is adapted to be used to connect a corrugated pipe to a flexible seal member of a drop box and is able to receive a speed leveling device.

Abstract: Fittings are provided for flexible sewage drain hoses to connect recreational vehicles to sewage facilities as may be found in public parks or other locations. The fittings include a shallow groove for storing an elastic ring, and a wider, deeper groove for placing the flexible sewer hose thereover. The ring can be quickly, easily manually dislodged from the storage groove and directed over the end of the hose where it contracts and securely holds the hose onto the fitting within the wide groove.

Abstract: A Connector for corrugated pipes or rods comprises a housing (2) having an open end (3) for insertion of a pipe or rod into a bore (5). A pair of resilient locking members of fingers (9) are formed in the housing wall and include projections (10) which extend into the bore (5). The projections are so shaped as to lock into a single valley of the pipe or rod corrugations to prevent withdrawal of the pipe or rod. Also disclosed are methods of moulding the connector in which the fingers (9) are held and/or forced outwardly from the mould during withdrawal of a central core which forms the bore (5) to avoid damage of the fingers by the core.

Abstract: A heavy attachment for attaching to an end of a drain hose of a recreational vehicle is disclosed. The attachment being made up of two half cylindrical shaped halves hinged together which can be pinned in a clamping position around the drain hose adjacent its outlet end with an inch or so of said hose projecting thereby providing an anchor for holding the drain hose in place.

Abstract: A coupler (A) defines a bell (C) having a cylindrical wall (40) of substantially the same inner diameter as an outer diameter of peaks (22) of a length of corrugated tubing (B). The corrugated tubing includes a gasket (30) received in a valley (24) near one end thereof. The gasket includes a flange portion (32) which is compressed into the valley by the side wall (40) as the end of the tubing is slid into the coupler (A). The coupler includes an annular groove (44) which is in alignment with the gasket when the inner end of the tubing engages a stop (10). The flange is resiliently biased outward into groove (44) where an outward facing groove engaging surface (46) of the gasket engages an inward facing gasket engaging surface (48) of the groove. The gasket may include a stiffer higher durometer rubber portion (52) for biasing the flange more stiffly into the groove and to transfer axial load to the bell more stiffly.

Abstract: For welding composite pipes together a welding ring is used, which bears against the side wall portions of elevations. It consists of thermoplastic material and is provided with an electric resistance heating. Prior to welding there is an annular gap between the front walls of the pipes to which annular gap a volume compensating groove is associated in the welding ring. A connection of the pipes in their region outside of their inner pipe is performed by an at least partial welding of the welding ring, the front walls bearing against each other in unwelded manner.

Abstract: A quick connect device for coupling a vent or exhaust hose to the exhaust pipe of a clothes dryer or the like, the device having a tubular member of unitary construction with a first, female end portion and a second, male end portion; the first portion including magnetic material for magnetically engaging with a exhaust pipe of dryer, the second portion threadably engaged with an exhaust hose.

Abstract: A method and apparatus for producing plastic parts with a resilient projection, such as connectors for corrugated tubing. The method comprises the steps of flowing plastic material on a core provided with a recess to mould the resilient projection, camming the resilient projection out of the recess, after the mass of plastic material is solidified and extracting the solidified part from the core. The invention also extends to a novel connector for corrugated tubing.

Abstract: A coupling for coupling a corrugated hose to a socket having a cylindrical body with a "U"-shaped annular recess therein. The hose has an outside surface with parallel grooves therein. The parallel grooves have slanted or tapered sides. Flexible "O"-rings are stretched over the outside surface and placed in the parallel grooves near one end of the hose. The hose with the "O"-rings thereon is pushed into the socket so that the "O"-rings contact the "U"-shaped recess. Each "O" ring provides a seal between each of the tapered sides of the groove in which it is positioned and the "U"-shaped annular recess to provide a three point contact air seal between the hose and the socket.

Abstract: A connection assembly for vehicle engine coolant circuits, wherein a tubular multiway distributing element presents respective tubular appendixes fitted with the end portion of a branch pipe. The pipe and tubular appendix are made integral by means of a tubular coupling molded in one piece on the end portion of the pipe, on a relatively small portion connecting with the appendix.

Abstract: A pipe coupling for the union of a corrugated pipe therewith is formed of a pipe coupling proper and a lock cylinder for fixing a corrugated pipe. The lock cylinder is helically joined to the inner surface of the leading part of the pipe coupling proper and fixes the corrugated pipe by rotationally closing the lock cylinder helically tacked to the pipe coupling proper, and at the same time seals the pipe coupling proper by pressing the leading terminal part of the lock cylinder against a seal ring attached fast to the interior of the pipe coupling proper, enabling the corrugated pipe to be infallibly locked and sealed owing to the provision of a spacer adapted to preset and keep a closing distance for the lock cylinder. The spacer is detachably attached to the periphery of the pipe coupling proper.

Abstract: The seal (4) has an annular body (10) with a generating section which is substantially rectangular and with an inner cylindrical surface (18) having a diameter (d1) substantially equal to the nominal diameter of the tubing (2) to be connected to the coupling (1). The seal (4) has a rib (20) projecting radially inwardly and having an inner diameter (d2) less than the outer diameter (d1) of the tubing. The seal also has an annular lip (24) which projects axially and has an inner surface with a diameter (d3) intermediate the internal diameter (d2) of the radial rib (20) and the diameter (d1) of the inner surface (18) of the seal (4).

Abstract: A tube or pipe connector of plastic for corrugated pipes or tubes is adapted to be folded open in the axial direction, comprises two half members connected via a film hinge and provided with a detent member for mutual locking of the half members, and at least one portion which is adapted to receive corrugated pipe and the interior of which is formed to match the outer periphery of the corrugated pipe. The pipe connector is provided with a tube piece which has a thread and a stop member is provided which has an outer diameter greater than the outer diameter of the tube piece. Furthermore, a tube connector of plastic is proposed for corrugated pipes of different outer diameter, and a divisible nut of plastic for such tube connectors serves for securing the threaded tube pieces.

Abstract: An end of a convoluted metal hose is connected to an adaptor having an end surface which is rounded to complement a contour of an endmost convolution. A straight section of the convoluted hose extends unbonded some distance through a bore in the adaptor, where it is welded in place. This way any flexing is by a section of the wrapping over the rounded end, the wrapping section being remote from any heat damage which may result from the welding. The internal transition between the bores of the hose and adaptor is straight and smooth, free of any crevice.

Abstract: A joint for connecting a corrugated pipe to another member includes a cylindrical body having an annular step portion formed in its inner part and adapted to be brought into contact with a front end of a corrugated pipe; a chuck having an annular body which includes a forward end part of an inner diameter substantially equal to or slightly smaller than an outer diameter of the corrugated pipe and which exhibits elasticity by which the chuck can contract and expand in radially inner and outer directions, an engaging portion formed on an inner periphery of its forward end part for engaging an outer periphery of the corrugated pipe, and a locking portion formed on an inner periphery of its rearward end part, the chuck being engaged with the outer periphery of the corrugated pipe in the cylindrical body so as to be capable of moving the corrugated pipe into the cylindrical body integrally with the chuck; and a push cylinder having a counterpart locking portion formed on an outer periphery of its forward end part

Abstract: A stab joint coupling, for joining corrugated pipes, has a male connector and a female connector both having means for attachment to a first and second piece of pipe by engaging the corrugation of the pipe. A circumferential elastomeric sealing means is positioned between the joined coupling connectors to effect a substantial liquid seal for the joint. The coupling permits two pieces of corrugated pipe to be joined relatively inexpensively and quickly by workers in the field.

Abstract: A bundle of wiring and piping lines, for supplying a control signal and working a first arm from a control unit to a hand, passes through a first flexible pipe, one end of which is connected onto a fixing jig attached to a base unit and the other end of which is connected onto a second arm, a second flexible pipe, one end of which is connected onto the second arm and the other end of which is connected onto a hollow third arm, and the third arm. One end of the bundle is connected to the control unit and the other end thereof is connected to the hand.

Abstract: A fluid tight coupling arrangement is provided for a corrugated tube 5 comprising a coupling member 1, for example, a manifold or end connector, having a cylindrical recess 2 in which a corrugated tube end is adapted to be received, an "O" ring seal 9 in the recess between the tube 5 and the inside of the recess 2, and a radially expandable split ring spring clip 6 which is engageable with a corrugation of the tube 5 and with an abutment 8 in the recess 2 for retaining the end of the tube 5 in the recess 2 (FIG. 1).

Abstract: A connector assembly for connecting double walled insulated tubing uses connector members each having inner and outer walls engaging inner and outer walls of the tubing, and end walls which are configured to interengage and form a lapped joint, each outer wall and optionally each inner wall of each connector member being associated with a support ring so that each tubing wall is clamped between a connector wall and a support ring by blind rivets or other fastenings passed through the connector wall, the tubing wall and the support ring. The connector assembly can be either factory applied or applied in the field using available hand tools, yet provides a neat and reliable connection.

Abstract: A gasket adapter for providing a sealing surface on a ribbed conduit is disclosed. The adapter is fabricated from an elastomeric material and includes a smooth, cylindrical outer surface adapter to mate with a conventional gasket employed between an opening and a conduit, or between aligned conduits. The inner surface of the adapter comprises a series of peaks and valleys which are adapted to nest with the peaks and valleys of a conduit surface. The adapter is initially fabricated with its cylindrical surface as its inside surface so that the adapter may be installed on the ribbed conduit and then inverted to provide the smooth outer sealing surface.

Abstract: A combination of metallurgical and vent engineering design solutions that result in a superior product, lower installed cost, and corrosion-free performance for venting modern fan-assisted gas appliances by using a flexible, compressible, corrugated gas vent connector. Preferably the connector is constructed from a material having a heat conductivity substantially equal to or greater than aluminum. Other forms of the invention include the use of stainless steel; a double wall corrugated wall in the flex section; and the use of flat flex in the corrugated section.By providing the flex connector with twist lock couplings the connector may be assembled in the field more quickly with a greater assurance of its integrity under adverse conditions such as earthquakes or other building moving conditions.

Abstract: A coupler for use with pipe is disclosed having a unitary tubular structure with an inner and an outer surface. The inner surface has at least one and preferably three interiorly depending ribs. The outer surface is preferably corrugated and has formed therein a plurality of valleys. The inner surface also has a plurality of valleys formed therein which may have associated therewith pressure beads. The inner surface valleys are disposed between adjacent interiorly depending ribs. The coupler preferably has its tubular structure encircled with means for clamping the coupler more tightly to a pipe. Also disclosed is the combination of the coupler securing adjacent pieces of corrugated double-wall plastic pipe to one another.

Abstract: A connector for corrugated pipes or rods includes a housing (2) having an open end (3) for insertion of a pipe or rod into a bore (5). A pair of resilient locking members or fingers (9) are formed in the housing wall and include projections (10) which extend into the bore (5). The projections are so shaped as to lock into a single valley of the pipe or rod corrugations to prevent withdrawal of the pipe or rod. Also disclosed are methods of molding the connector in which the fingers (9) are held and/or forced outwardly from the mold during withdrawal of a central core which forms the bore (5) to avoid damage to the fingers by the core.

Abstract: A dryer duct assembly employs two universal elbow components and at least one flexible component. The flexible component has ends capable of connecting to another flexible component or to a universal component without the use of other devices such as hose clamps to secure connection. Each elbow has ends capable of attaching either to the wall opening or the dryer, in addition to attaching to the flexible component in the same manner as the flexible components may attach to each other. The elbow has an outer portion resembling the outer portion of a quarter-toroid, and a square type inner portion. The outer portion is made of a pair of mirror image hemi portions connected at adjacent flanges. The inner portion has an L-shaped plate with flow-through orifices in each leg of the L.

Abstract: A flexible, multiple passage conduit assembly for use in fiber optic systems comprises an outer elongated housing formed from circumferentially corrugated flexible plastic conduit of cylindrical configuration. A separate rigid end fitting member of generally cylindrical configuration is joined to each end of the conduit to close the ends and allow for joining the assembly to associated multiple passage conduits. A plurality of lengths of hollow flexible plastic tubing are located within the conduit housing to extend the length thereof. The lengths of tubing terminate in open ends adjacent the end fittings. The open ends of the tubing are connected to the end fitting members by connections which permit relative axial movement between the lengths of tubing and at least one of the end fitting members.