Abstract: Either of first and second corrugated tubes having different groove (or ridge) pitches can be mounted on a connector 10. In this case, the distance between a first retaining projection 32 and a second retaining projection 34 is a common multiple of these pitches, and therefore either of the two different corrugated tubes can be properly retained on both of the first and second retaining projections 32 and 34. Furthermore, either of the first and second corrugated tubes 50 and 52 of different diameters can be properly fixed to a tube insertion portion 20 by a binding band passed through binding band passage holes 30.

Abstract: A coupler for a corrugated pipe in which several elements thereof can be handled as a single assembly body, and which can be coupled to the corrugated pipe through a simple process. The coupler includes a coupling base, a guide member, a compression ring, a force-fitting member, a sleeve and a cap nut. A through hole, a compression hole and an insert hole are continuously formed through the coupling base. The guide member is inserted into the insert hole of the coupling base. The compression ring has an opening such that the compression ring is elastically expanded or contracted in diameter. The compression ring is fitted into the insert hole of the coupling base. The force-fitting member is fitted into the insert hole of the coupling base. The sleeve is inserted into the insert hole of the coupling base. A passing hole having a diameter corresponding to the diameter of the peak portion of the corrugated pipe is formed through the sleeve.

Abstract: A hose connector includes a cylindrical elongated member having a first and second end, a first and second inner sleeve rotatably mounted on the cylindrical member, and a first and second outer sleeve capable of connecting to the respective first and second inner sleeves.

Abstract: A drain basin has a basin with walls and a cavity therein. The basin can have one or more sleeves coupled thereto. The sleeves are in communication with the cavity. The sleeves form pipe couplings to the basin. Each sleeve has a free end and a fixed end. The fixed end is coupled to the basin. The sleeve has an inside diameter that decreases toward the fixed end, which inside diameter is structured and arranged to receive the outside diameter of a small pipe. The sleeve also has an outside diameter that increases toward the fixed end, which outside diameter is structured and arranged to receive the inside diameter of a larger pipe. In addition, catches are provided to couple a corrugated pipe to the sleeve. The catches comprise fingers that flex or projections on ribs. Thus, the drain basin allows several diameters of several different pipes to be coupled to the drain basin.

Abstract: A connection assembly for pipes is provided. The assembly includes a pipe, a corrugated conduit, a circumferentially contractible seal positioned between portions of the conduit and the pipe, a clamp encircling the conduit, seal and pipe, and a plurality of discrete projections on the inside of the seal to limit the extent of overlap between the pipe and the conduit. The seal is circumferentially contractible to secure the conduit and the pipe together with the seal serving to effect a gas-tight seal while filling the annular gap between the conduit and pipe.

Abstract: Fitting connections for corrugated metal tubing. The connection includes a body having an externally-threaded end, a nut or other fastener which is threadably engageable with the body end, and a collet which is receivable coaxially within the fastener. The collet is formed as a series of individual, arcuate tangs which are joined together by a retaining collar, the collar allowing the segments to be resiliently opened within the fastener so as to allow the crests of the tubing to pass therethrough. The fitting may be pre-assembled with the collet segments being received coaxially within the fastener with the collar extending rearwardly from the fastener, and with the fastener then being partially threaded onto the fitting body.

Abstract: A plastic pipe coupler is provided having a plurality of sections connected to one another but with at least one gap between the ends of two sections which are adjacent to one another. Each of the coupler sections has an exterior surface and an interior surface, and is fabricated so that when taken together, the sections cooperatively circumvent a section of plastic pipe. Each bracket is secured to the exterior surface of one of the aforesaid sections of the coupler and has a base plate, a pair of sidewall plates attached to each base plate, and a crosspiece having a first end and a second end, the first end of which is in contacting relationship with one of the pair of sidewall plates, while the second end is in contacting relationship with the other of the pair of sidewall plates.

Abstract: A fitting assembly for forming a fluid-tight seal with an end of a stainless steel tube is provided with a seal seat that is composed of a material that is harder than the material that the stainless steel tube is composed of. The stainless steel tube may be gripped between a bushing and the seal seat to form a fluid-tight seal with the stainless steel tube. The fitting assembly may be tightened so that the stainless steel tube is deformed between the bushing and the seal seat of the fitting assembly.

Abstract: The invention relates to corrugated pipe hose assemblies which are not provided with fixtures and which are used to transport preferably gaseous media in high-pressure applications, wherein a mount (3) is provided in order to receive an open end of the corrugated pipe (6) of the corrugated pipe assembly (2) and which is pressed therewith in order to form a metallic seal. The seal is obtained by means of a sealing bushing (25) between the inner wall (18) of one part (16) of the mount and the ribs (8) of the corrugated pipe (6). Another part (17) of the mount (3) firmly holds a section (27) of the covering (11) of the corrugated pipe hose assembly (2) in an axial direction and also with respect to tilting movements such that pivoting movements of the corrugated pipe hose assembly (2) do not result in a relative movement between the corrugated pipe (6) and the mount (3), especially with regard to one part (16).

Abstract: A sealing device and method for sealing a length of tubing with a fitting is provided, where the sealing device includes at least one sealing surface formed with a plurality of ridges. The ridges include at least one end ridge and at least one internal ridge which are spaced apart by a predetermined distance, and formed with a desired geometry such as U-shaped, V-shaped, or various other shapes and with different sealing faces such as curved or flat. The ridges are spaced apart in a manner to maximize sealing pressure, and produce stress concentrations and localized deformations, in order to create a seal at lower torques or on stiffer tubing or tubing with at least one minor defect such as a dent or weld. The sealing device is particularly useful for sealing an end corrugation of tubing in a fitting used in gas and liquid piping systems.

Abstract: A fast-connecting joint for corrugated pipes includes a main body and an engaging member. The main body has a through hole for liquid to flow through, and an inner recessed annular wall provided with an annular slope close to one end of the main body. The engaging member possesses an outer annular wall, and plural flexible curved petals extending outward around one end of the outer annular wall and respectively having a projection on their outer surface. In assembly, the engaging member is inserted in the through hole of the main body, with the projections of the engaging member correspondingly fitted against the inner recessed annular wall. In use, a corrugated pipe can be quickly fastened with the fast-connecting joint tightly when it is inserted into the engaging member to keep its annular groove blocked by the curved petals.

Abstract: A sealing device and method for sealing a length of tubing with a fitting, where the sealing device includes at least one sealing surface formed with a plurality of ridges. The sealing device is particularly useful for sealing at least an end corrugation of tubing in a fitting used in gas and liquid piping systems. The fitting is sized to maintain a generally circular shape of the end corrugation after the corrugation is collapsed between the ridged sealing surface and another sealing surface. In particular, an inner diameter of one or more components of the fitting can be sized such that the corrugated tubing will have a circular profile to provide an optimal seal.

Abstract: A twin-wall pipe comprises an internal pipe and an external pipe. The external pipe is corrugated, having elevations and troughs. The twin-wall pipe is further provided with a socket. In a transition portion towards the twin-wall pipe and the socket, provision is made for at least one overflow passage which interconnects the clearance between the external pipe and internal pipe in the vicinity of the transition portion and an adjacent elevation.

Abstract: A protector (10) has two half members (20, 40) forming a tubular shape upon being assembled. One half member (20) includes a pair of temporary fixing ribs (26A, 26B) projecting more than a contact edge (23) with the other half member (40) and standing up at the opposite sides of each of corrugated tubes (80A, 80B), each pair of temporary fixing ribs (26A, 26B) are shaped to be insertable into grooves (81A, 81B) of the corresponding corrugated tube (80A, 80B), and stand-up ends (27A, 27B) of the pair of temporary fixing ribs (26A, 26B) are bent to approach each other along the groove (81A, 81B) of the corrugated tube (80A, 80B).

Abstract: A coupling structure for a pipe having an enhanced sealing property for a bellows-type pipe. The coupling structure includes a tubular inner sealing portion that is formed from an elastic material. The tubular inner sealing portion has an abutment surface that is configured to abut against an inner circumference of the pipe. The coupling structure also includes a tubular outer sealing portion that is formed from an elastic material. The tubular outer sealing portion has an abutment surface that is configured to abut against an inner circumference of the pipe. An axial end of the tubular outer sealing portion is connected to the tubular inner sealing portion so as to enclose the end face of the pipe. The coupling structure is also provided with a fastener for holding both the tubular inner sealing portion and the tubular outer sealing portions radially inwardly and outwardly.

Abstract: A permanently lubricated film gasket for providing a fluid-tight seal between a corrugated pipe and a smooth annular section of an outer pipe or section when the corrugated pipe and the outer pipe or section are in a relative surrounded and surrounding relationship. A first portion of the gasket is shaped to fit within a groove or recess of the corrugated pipe. A second portion of the gasket extends from the first portion. The second portion is at least partially comprised of permanently lubricated film for facilitating in the connection of the pipes along a single direction.

Abstract: A flexible tube 10 of the present invention is disposed downstream of a exhaust path from an engine E, and formed of an outer bellows 3 as an outer tube and an inner bellows 4 as an inner tube; pleats 4c,4c of the inner bellows 4 are smaller in depth and pitch than the pleats 3c of the outer bellows 3, and the buffering space S is provided with a gap t between the pleats bottoms of the outer bellows 3 and the pleats tops of the inner bellows 4, and further, a partition 17 that splits the exhaust path is disposed in the inner bellows 4. For this reason, sound insulation effect is improved, and the lowering of the temperature of the exhaust gas is suppressed, leading to quick temperature rise of the exhaust gas to be fed into the catalytic converter, thereby promoting the activation of the catalysts and improving the capability to purify exhaust gas, and the exhaust efficiency can be improved thereby increasing output performance of the engine.

Abstract: A bell and spigot coupling system is provided for joining corrugated plastic pipe which improves the coupling's sealing capability with increasing hydrostatic pressure, and causes a substantial component of the force generated therefrom to be absorbed axially through the coupled sections of adjoining pipe. The spigot end of one pipe which is received within a bell coupler for an adjoining pipe terminates in a small annular bed-forming rib which forms a gasket bed that holds a gasket compressed against a radially extending gasket sealing surface of the bell coupler. Inward protruding latches formed in the bell coupler engage the adjoining section of corrugated pipe to resist axial separation and hold the gasket compressed against the sealing surface of the bell coupler. The sealing surface of the bell coupler contours the spigot end of the adjoining pipe and forms radially constricting pathways at opposite sides of the gasket.

Abstract: Disclosed is a coupling for a spiral wire flexible hose. The coupling includes a ring clamp configured as a clamping jaw and including at least two partial shells enclosing a sleeve of the spiral wire flexible hose. The ring clamp has an inner contour having a spiral to receive a spiral wire flexible hose in a positive locking engagement. The hose is adapted to receive a spout therein. The spiral extends up to a protrusion situated at the end of the ring clamp. The spout is clamped such that the spout is axially immovable.

Abstract: A conduit assembly, such as an electrical conduit assembly, includes a flexible convoluted tube having a non-conductive fluoropolymer interior and a conductive carbon exterior that decreases the electrical resistance of the tube. A fitting is secured to an end of the flexible convoluted tube. The fitting includes a nipple having a profiled tubular portion received into the end of the flexible convoluted tube and a socket secured to the fitting so as trap the end of the flexible convoluted tube between the nipple and the socket. At least one of the nipple and the socket are made from a metal treated to decrease the electrical resistance of the fitting.

Abstract: For connecting flexible corrugated hoses, which are not provided with fittings, for transporting preferably gaseous media in connection with high-pressure applications, a holder 3 is provided, which receives an exposed end of the corrugated pipe 6 of the flexible corrugated hose 2 and is pressed together with it to form a metallic seal. The metallic seal is achieved by the surface pressure between the interior wall 18 of an element 16 of the holder and the ribs 8 of the corrugated pipe 6. Elastomeric seals 24, 25, as well as a soldering joint 34, if desired, can be provided as aids. However, in connection with a preferred embodiment the required sealing is already achieved by the strong pressure against each other of the metallic exterior of the corrugated pipe 6 and the metallic interior of the element 16.

Abstract: The invention provides a coupling endpiece engageable by force in a corrugated end of a corrugated tube having corrugations following one another at a predetermined pitch and possessing a minimum inside diameter and a maximum inside diameter. The endpiece is constituted by a tubular body possessing a first zone provided on the outside with at least two annular barbs of the Christmas-tree type that are spaced apart by a distance corresponding to the pitch of the corrugations of the tube and having a maximum diameter greater than the maximum inside diameter of the tube, the first zone presenting between the barbs a minimum diameter greater than the minimum inside diameter of the tube, and the body has a second zone extending immediately behind the barbs to receive at least one end corrugation of the tube and having an outside diameter less than a diameter of a junction zone between two annular barbs. The invention also provides a corrugated tube fitted with such an endpiece.

Abstract: In a corrugated pipe comprising two sections joined by telescopically mating a male end of one section with a female end of the other section, an annular sealing element is fixed to the exterior surface of the male end and disposed to sealingly engage the interior surface of the female end. An annular band of reinforcing material is disposed around the exterior surface of the female end at a position along the longitudinal axis thereof that is in general alignment with the sealing element. The reinforcing material resists loss of sealing engagement between the female end and the sealing element during use of the pipe.

Abstract: Plug connection between a corrugated hose and an unprofiled pipe. A plug connection is provided between a corrugated hose (1) and an unprofiled pipe (31), a holding element (3, 34, 50) that surrounds the unprofiled pipe (31) being connected at least indirectly with the hose end (4), and the end (31) of the unprofiled pipe being surrounded by a sealing ring (16, 17, 30) that is situated before the holding element (3, 34, 50). The sealing ring is connected at least indirectly with the hose (1) so as to form a seal. It is provided that the holding element (3, 34, 50) is situated in the hose end (4) and is held thereby, at least indirectly, by mutual positively locking engagement in the axial direction, and that on the other side of the seal (17, 18, 30) a guide sleeve (18, 25) having an inner diameter that corresponds to the outer diameter of the unprofiled pipe (31) is situated before the holding element (3, 34, 50).

Abstract: An apparatus for joining the ends of a pair of ribbed ducts together has a collar with an interior suitable for receiving the ends of the pair of ducts therein, a first coupler element translatably secured adjacent a first end of the collar, a compressible seal disposed between a surface of the first coupler element and the first end of the collar, a second coupler element secured adjacent a second end of the collar, and a second seal disposed between a surface of the second coupler element and the second end of the collar. The coupler elements are translatable so as to compress the seal such that a surface of the seal will bear against a respective rib of the pair of ducts.

Abstract: An apparatus for joining ends of a pair of ducts together in end-to-end relationship has a collar with a first end portion and a second end portion, a first coupler element translatably secured to an exterior of the collar for moving the first end portion between first and second positions, and a second coupler element translatably secured to the exterior of the collar so as to move the second end portion between first and second positions. The end portions have a plurality of fingers that are movable so as to be free of the surfaces of the duct when in the first position and which contact a rib of the duct when in the second position. The collar and the coupler elements form a liquid-tight seal over the respective ends of the pair of ducts.

Abstract: Connector for connecting a pair of tubular components together, such as a pair of exhaust conduits of a dryer or an exhaust conduit of a dryer to a dryer vent or wall-mounted vent sleeve, including a pair of generally semi-cylindrical members each having a first, coupled edge and a second, free edge and rotatably connected together at the coupled edge, e.g., by a hinge, and separable from one another at the free edge. A quick connect/quick disconnect locking structure is arranged in connection with the semi-cylindrical members for locking them to one another with the free edges opposite one another.

Abstract: A twin-wall pipe comprises an internal pipe and an external pipe. The external pipe is corrugated, having elevations and troughs. The twin-wall pipe is further provided with a socket. In a transition portion towards the twin-wall pipe and the socket, provision is made for at least one overflow passage which interconnects the clearance between the external pipe and internal pipe in the vicinity of the transition portion and an adjacent elevation.

Abstract: A fluid line connector includes a length of tubing having a plurality of corrugations formed therealong between opposing tubing ends. A non-corrugated section is disposed along the length of tubing between the opposing tubing ends such that a portion of the plurality of corrugations extends between the non-corrugated section and each of the opposing tubing ends.

Abstract: The present invention relates to a metallic tubular hose which suppresses disintegration in which the metallic tubular hose comprises a hose body having a longitudinal edge at one end thereof and a bellows metallic tube inner layer with the inner layer composed of a corrugated bellows portion and a restricted portion, a jacket composed of a plurality of layers surrounding the inner layer, a rigid insert pipe extending into the hose body and a metallic sleeve engaging the hose body along said longitudinal edge for compressing said jacket against said rigid insert pipe wherein said plurality of layers in said jacket includes an inner layer adjacent to said restricted portion of said bellows metallic tube inner layer composed of a flexible and hard material possessing a tensile modulus of between 4 MPa and 8 MPa for a composition of rubber and about 300 MPa for a resin material composition and preferably between 1000 MPa and 6000 MPa.

Abstract: A plastic coupling for joining two metal pipe sections end-to-end to form a pipe assembly. A first plastic spigot cuff is formed along the periphery of the end of the first pipe and a mating second plastic bell cuff is formed along the periphery of the end of the second pipe, such that the first and second cuffs form a bell and spigot joint with the first, spigot cuff inserted into and joined to the second, bell cuff.

Abstract: A corrugated pipe connection joint structure and method for connecting two sections of corrugated pipe. The joint structure includes opposing bell-formed ends with reduced corrugations, a connector insert including a gasket on either end and a push-ring. The gasket(s) form a seal sufficient to keep fluid inside the pipe, and to help keep the joint structure from separating under normal use.

Abstract: The connecting element for transporting gaseous, liquid or solid substances include a tubular coupling which has on the inside a cylindrically running first recess, in which a corrugated tube is arranged, and which has a cylindrically running second recess which adjoins the first recess and In which an annular seal is arranged adjacent to the first recess and an expanding ring is arranged adjacent to the annular seal. The expanding ring has, on the outside, a first projection which points toward the coupling and engages in an encircling groove arranged in the second recess. With its projection which points toward the corrugated tube, both the expanding ring and the annular seal are in each case in engagement with the corrugated tube from outside. The subject matter of the invention is also the use of the connecting element as a subassembly in windshield washer units.

Abstract: A tubing and connector system including a plastic tubing or hose having a helical outer surface, a plastic lock nut having a helical internal surface with the same thread pitch as the pitch of the tubing outer surface, and a fitting having several barbs formed on its outer surface. The tubing and connector system has few parts and is easy to assemble by having the inner surface of the tubing engage the barbs of the fitting, and the lock nut, being mounted on the outer surface of the tubing, is rotated over the tubing and the fitting so as to squeeze the tubing between the lock nut and the fitting. Disassembly for washing is also easily accomplished by backing the lock nut away from the fitting and pulling the tubing off of the fitting.

Abstract: A coupling for joining metal pipes or pipe sections end-to-end to form a pipe assembly. A plastic cuff is formed on one of the pipe ends and a mating, second plastic cuff is formed on the other pipe end. In one embodiment, a wire hoop is mounted over each pipe end, the hoops are rotatable around the associated pipe ends to align the hoops, and bolt assemblies spanning the two hoops are used to tighten the hoops axially, to thereby clamp the pipe ends and compress the cuffs between the pipe ends and provide a leak-proof joint. The cuffs are selected from configurations including tongue-and-groove and bell-and-spigot. The cuffs can be formed on the pipe ends in the shop, then the pre-cuffed pipe sections can be readily assembled into stable, leak-proof, corrosion-resistant lengths of pipe in the field.

Abstract: In a hose with a corrugated metal tube, an axial leading end portion of the corrugated metal tube is configured as an extending portion so as to extend in an axial direction beyond a base portion of a socket fitting and be exposed out of an outer layer of the hose. The extending portion is clamped by an inner end surface of the base portion and an outer surface of a rigid insert pipe.

Abstract: A flexible bellows tube connecting pipes in a system such as a vehicle exhaust system. Various embodiments are disclosed, with each including two conduit sections having mating corrugations that overlap to provide a seal while allowing the two sections to rotate in response to torsion loading. Different configurations of the interfitting corrugations and related structure are disclosed in the different embodiments.

Abstract: A flexible hose formed from corrugated metal tube has a fitting permanently crimped to the end of the hose. The fitting includes an elongated stem having a first end adapted to be coupled to an appropriate fitting surface and a second end configured to be received within the hose. A sealing member disposed on the second end of the stem seals the fitting between the corrugated metal tube and the stem. A ferrule is placed over the hose and is crimped to compress the hose and sealing member between the ferrule and stem.

Abstract: A flexible connector comprises a length of corrugated tubing, a polymeric sleeve aligned with the distal end of the length of corrugated tubing, and a length of mesh tubing extending the entire length of corrugated tubing and over the polymeric sleeve. The distal end of the corrugated tubing, the polymeric sleeve, and the distal end of the length of mesh tubing are received in a sleeve which is formed integrally with an end piece. The sleeve is crimped into permanent retaining engagement with the length of corrugated tubing, the polymeric sleeve, and the length of mesh tubing. The end piece functions to secure the flexible connector into engagement with an adjacent component.

Abstract: A fitting for an end of a length of corrugated tubing forms a gas-tight metal-to-metal seal by rolling and folding an endmost corrugation into a axially extending annular groove in the fitting body. A ridged retainer grips the tubing corrugations above the endmost corrugation and is axially advanced into the fitting body by a nut. The cut end at the endmost corrugation of the tubing encounters the axially facing end of a tubular stub inside the fitting body and folds over itself and into the annular groove between the stub and the inside surface of the fitting body. A seal member is thus formed with a pair of substantially parallel sealing surfaces, and resides between the retainer and the outside surface of the tubular stub. The seal member forms a metal/metal seal with the tubular stub.

Abstract: A hose having a corrugated metal tube as the innermost layer and an outer layer including an inner elastic layer, a reinforced layer and an outer elastic layer. A socket fitting is swaged onto the hose body at three axially spaced points. The corrugated metal tube is provided with a flattened end portion. A proximal end of the flattened end portion extends for a minimum of 10 mm. axially away (in the direction of the complete corrugations) from the swaged point which is axially most proximate to the proximal end of the flattened end portion.

Abstract: A culvert band installation tool includes two end plates that are substantially parallel to one another and a bolt to draw the end plates together facilitating the culvert band installation process. The ends plates are maintained substantially parallel to one another by using slip shafts that pass through long sleeves that pass through holes in the end plates. The slip shafts are substantially parallel to the bolt. Indexing pins are installed in the end plates that engage holes in the flanges of the culvert band. A band is installed by using the culvert installation tool to clamp the flanges sufficiently close together to fasten with carriage bolts.

Abstract: A repositionable downspout extension is formed as an integral blow molded plastic component having three distinct sections. A downspout connector end merges with a corrugated extendible middle section which terminates in a drainage pipe connector. The downspout connector includes two rectangular sections of different sizes defining two different securing segments for engaging two different sizes of downspouts. The middle section is of a pleated configuration and is of variable length by expanding or collapsing of the pleats. The drainage pipe connector is a circular connector for connecting with commonly used corrugated plastic pipe or rigid plastic pipe. In a preferred embodiment the downspout connector end also includes a connector for insertion and retention in the corrugated middle section.

Abstract: A flexible corrugated hose fitting, which is particularly provided for high-pressure installations, such as air conditioning installations using CO2 as the refrigerant, has a connecting element, which can be snapped together with the interior corrugated pipe of the flexible corrugated hose. In addition, the connecting element has sealing elements, which come into sealing contact with the corrugated pipe. Following the area receiving the sealing elements, the connecting element has a cone, which is used as a clamping section. An exterior squeeze ring, or other squeeze element, is used for pressing the exposed end of the corrugated pipe against the clamping section. A pressing sleeve is used for pressing, which drives the squeeze ring by a wedge effect inward. It has an appropriate conical interior surface. The squeeze ring moreover extends over the sheathing. For further securing of the connection, the pressing sleeve can be pressed together here with the sheathing by an appropriate deformation.

Abstract: A duct connection assemble, whereby upon connecting a saddle flange (2a) of the joint duct (8) to the main ribbed duct (3) through the communication hole (1b), the rubber sealant (1) is interposed between the saddle flange (2a) and a circumferential area of the communication hole (1b) so that protuberances (2b) uniformly press the rubber sealant (1) through the recesses (1d) to tightly engage the saddle flange (2a) against an outer surface of the main ribbed duct (3) through rib-fitting grooves (1a) and the water sealing small projective rings (1c). The joint duct (2) is brought into an elastical engagement with the main ribbed duct (3) to achieve a good water sealing action for an extended period of time.

Abstract: An embodiment of the invention is a piping system including a fluid impermeable sleeve having a plurality of longitudinal, spaced ribs formed on an interior surface of the sleeve. A fluid carrying tubing is positioned internal to the sleeve. A coupling has a first end and a second end, the first end having interior threads engaging an outer surface of the sleeve. The coupling has a vent opening in fluid communication with the interior of the sleeve.

Abstract: A pipe coupling for joining adjacent ends of first and second pipe sections. The coupling includes a generally cylindrical sleeve having first and second sides. The sleeve is formed as a sheet which is rolled to form the sleeve, wherein the first side of the sleeve defines a substantially continuous annular corrugation to cooperatively engage an end of a first pipe section. The connection of the pipe coupling to the first pipe section end occurs at a factory. The second side of the sleeve is in the form of a bell and defines a non-corrugated surface which is adapted to slidably receive an end of the second pipe section in the field, to thereby interconnect the adjacent ends of pipe. Gaskets may be provided to further reduce infiltration or exfiltration at the coupling.

Abstract: A retaining feature is provided for connecting a plastic tube to a corrugated acoustic duct. The retaining feature accommodates variations in the undulations and thread pattern of the corrugated duct, while at the same time minimizing the materials, specialized equipment or tools, labor and cost of making a successful connection. The retaining feature includes at least one barb extending circumferentially around the exterior surface of the plastic tube. Each barb is sized and structured to engage an undulation of the corrugated duct.

Abstract: A hose coupling assembly wherein a hose 20 having a corrugated portion 22 is coupled to a fitting block 24 by a socket 50. The fitting block 24 has a block engagement catch 25c projecting from the outside rim of the block body 25. The socket 50 comprises a socket body 51 elastically expandable and contractible by being divided by a slit 51a, and a socket engagement catch 51b engages the block engagement catch 25c. To detach the socket 50 from the fitting block 24, force is applied in a rotation direction to a push operation portion 51c to cause the socket body 51 to undergo diametrical expansion, releasing the socket engagement catch 51b from the block engagement catch 25c.

Abstract: A flexible conduit includes a metal hose provided with a helical groove having a plurality of turns; a plastic jacket surrounding the metal hose and conforming to the helical groove thereof; a plastic inner hose received in the metal hose and having a projecting length portion extending beyond an end of the metal hose. The conduit further includes a plastic coupling part which surrounds the metal hose. The coupling part includes a cylindrical collar surrounding the projecting length portion and having a material-to-material bond therewith; and an overlapping portion adjoining the cylindrical collar and extending away therefrom. The overlapping portion surrounds the jacket and extends into the helical groove. The overlapping portion and the plastic jacket have a material-to-material bond with one another.