Abstract: A heat exchange device comprising phase change material-impregnated heat conductive foam disposed between fluid stream channels in a heat exchanger element.

Abstract: A method for producing a tube segment and a tube for an evacuated tube transport system and a method for producing the tube segment.

Abstract: The multi-layered conduit is an insulating structure. The multi-layer conduit system forms a thermally protected space that prevents a fluid from changing phase while flowing through the multi-layered conduit. The multi-layered conduit comprises a master pipe, a plurality of coaxial prism structures, a plurality of spoke structures, and a plurality of insulating spaces. The plurality of spoke structures interconnect each of the plurality of coaxial prism structures. The master pipe is a pipe inserts through the plurality of coaxial prism structures such that the combination of the master pipe structure and the plurality of coaxial prism structures form a coaxially oriented composite prism structure. The plurality of spoke structures further forms the plurality of insulating spaces. Each of the plurality of insulating spaces is a gas-filled space that inhibits the transfer of heat through the plurality of coaxial prism structures into the master pipe.

Abstract: The present invention is a construction panel mounting apparatus that temporarily secures a wall or ceiling panel in position until the installer can permanently secure it. The construction panel mounting apparatus of the present invention accommodates various size panels and essentially eliminates the need of a person to temporarily hold the panel in place while another permanently secures it. In addition, the construction panel mounting apparatus of the present invention also serves as a panel foot lift that facilitates the lifting of heavy panels from the floor.

Abstract: An exhaust manifold for an internal combustion engine includes a first exhaust port, a second exhaust port, and a septum that separates the first exhaust port and the second exhaust port. The septum has a surface with a J-groove to relieve stresses by looping a tip of a crack initiated by the J-groove back into a stress field of the J-groove.

Abstract: The present invention relates to a panel, especially for a component having a box structure in an airplane airfoil, comprising a surface shaped body and grid-like reinforcement bars protruding from the body on one side of the body, and the body and the grid-like reinforcement bars are integral molded. Since the body and the grid-like reinforcement bars of the panel are integral molded, no additional connecting process is required, so that the disconnection phenomenon as happened between the skin and the stiffener or stringer of the prior art would not occur, and the assembly complexity can be decreased.

Abstract: A plate (20) for a heat transfer tube (4) made from a metal sheet includes a peripheral outer wall (10) and having at least one first cavity (24) and least one second cavity (26) respectively formed in the metal sheet. The first cavity (24) is in contact with the peripheral outer wall (10) and the second cavity (26) is arranged at a distance from the outer wall (10). A heat transfer tube (4) of a heat exchanger (1) includes a pair of such plates (20) and a heat exchanger (1) includes a plurality of such tubes (4).

Abstract: When the common part of the outer pipe and the inner pipe is worked with the pressing-type punching-out work for connecting with the inner pipe, there occurs no possibility that any disadvantage caused by the punched-out debris is generated. An inner pipe is arranged at the inside of an outer pipe. Each part of the outer pipe and the inner pipe is partially made common and integrally formed to each other. The inner pipe has the side walls extending from a common part of the outer pipe and the inner pipe to the diametral direction of the outer pipe in parallel and the recess wall facing the common part of the outer pipe and the inner pipe at a deep end of the side walls is not expanded more than the space between the side walls.

Abstract: The device according to the invention for the cooling of articles, comprising at least one channel which can be connected to a first coolant source such that a first stream of a first coolant can flow through the channel, the articles to be cooled being introducible into the stream, is distinguished in that at least one cross-sectional stabilizer for stabilizing the cross section of the at least one channel is formed. The device according to the invention advantageously allows the defined cooling of articles, in particular the freezing of drops of a liquid or pasty material, in particular of liquid or pasty foods. In particular, a deformation, such as warping, of the channels on account of pronounced temperature gradients and/or temperature transients is effectively reduced. Thus, even after cooling-down operations, uniform cooling conditions can be ensured.

Abstract: This disclosure relates to a spoolable pipe or tube that comprises two or more channels or cells, for example, a plurality of channels, for enhanced or improved fluid transport of one, two, or multi-phase fluids, such as found in the transport of oil and/or natural gas. Also provided are methods for making the disclosed tubes, and methods of transporting multi-phase fluids.

Abstract: A method and apparatus for processing underwater beds includes a plurality of polygonal hollow pipes arranged side by side, the upper ends of which form a horizontal, substantially flat working platform. Each hollow pipe has a horizontal projection with a flange extending vertically and a corresponding flange insertion aperture with a slot immediately above it running vertically and extending as far as the upper end of the hollow pipe, the aperture being further away from the upper end of the hollow pipe than the projection with the flange and having a greater horizontal dimension than the slot. Neighboring hollow pipes engage one another via a respective projection with a corresponding slot. The hollow pipes cannot be moved relative to one another horizontally. Individual pipes can only be pulled out individually in an upward direction at the platform outer edge.

Abstract: A tubing member for use in well operations comprises a solid core extruded casing surrounding a production tubing passage arranged to receive produced fluids from a well therethrough and one or more auxiliary conduits arranged for communicate with well equipment. The casing is rectangular in cross section having a pair of opposed flat sides which can be wound onto a spool such that the flat sides are parallel to an axis of rotation of the spool. A longitudinal extending central axis of the production tubing and of each auxiliary conduit are situated spaced apart from one another along a common diametrical axis arranged to be parallel to the flat sides of the casing and the spool axis. The unitary casing provides good protection for electrical lines, hydraulic lines and other communication lines in the conduits alongside production tubing in a low cost and easy to manufacture tubing member.

Abstract: A pressure washer is provided. The pressure washer includes a fluid inlet and a pump disposed to receive fluid from the fluid inlet. A spray gun is provided that includes a first outlet and a separate second outlet. A first conduit fluidly connects the fluid inlet and the pump with the first outlet and a second conduit fluidly connects the fluid inlet with the second outlet.

Abstract: A protective pipe cover and support apparatus is disclosed that provides for secure attachment to an underlying surface, such as a concrete, tarmac or stone surface, for example, and which provides for secure retention and support of multiple pipes or other conduits within the pipe cover and protection of the pipes against loads, impacts and/or other forces applied to the pipe cover. The protective pipe cover includes a load bearing cover element with lateral load bearing supports which bear against an underlying surface, a curved outer web extending between the lateral supports, and a central load bearing support extending between the outer web and an underlying surface, and including an anchor for attachment to the surface. The pipe cover also includes a pipe support with multiple pipe retainer clips for resiliently retaining multiple pipes situated between the outer web of the load bearing cover element, and the underlying surface.

Abstract: Multi-port tube structures are fabricated in a process in which a web of metallic material has a pattern of features formed therein by a rotary die forming process carried out on a continuous basis. The web of material is cut into strips which are folded so as to define a closed tubular structure having internal features defining longitudinal fluid flow channels.

Abstract: A method for fabricating a unitary conduit is disclosed the method comprising the steps of determining three-dimensional information of the unitary conduit having at least one flow passage, converting the three-dimensional information into a plurality of slices that each define a cross-sectional layer of the unitary conduit, and successively forming each layer of the unitary conduit by fusing a metallic powder using laser energy. A unitary conduit is disclosed, comprising a body and a flow passage, wherein the flow passage and the body have a unitary construction, and made by using a rapid manufacturing process.

Abstract: A modular exhaust tube system for directing exhaust gases from an internal combustion engine. The exhaust tube system includes first and second elongate half-shells, with each half-shell comprising an elongate thin-wall body having a substantially U-shaped cross-sectional profile with a constant sideways opening along the length of the body. The exhaust tube system also includes a center brace having dimensions which span the length and height of the sideways openings. The sideways openings of the first and second half-shells are coupled together around the center brace to form a flattened elongate exhaust tube having an inlet end and an outlet end for directing exhaust gases from the internal combustion engine. In one aspect the first and second half-shells are selected from a group of interchangeable and modular half-shells having different substantially U-shaped cross-sectional profiles that are reversible top-to-bottom and end-to-end.

Abstract: The inventive entrance/exit piping structure 20 for an intercooler 10 is formed of a plurality of pipes 21 to 24, the pipe end portions 20a, 20b are bundled together to have a circular contour and, in a middle portion 20c, the respective pipes are arranged adjacent to each other and are bent together.

Abstract: A hose member having a central region surrounded by a circumferential portion comprising a number of metal tubes that are substantially parallel to each other and wound in a helical manner around a longitudinal axis of the hose member. The central region may be defined by a carrier made of a polymeric material, or a longitudinal central cavity.

Abstract: A unitary conduit for transporting a fluid is described, the conduit comprising a body and a flow passage located within the body, the flow passage having an inlet end and an exit end, wherein the flow passage and the body have a unitary construction. In another embodiment, a unitary conduit has a flow passage wherein the cross sectional shape of the flow passage changes from a first cross sectional shape to a second cross sectional shape. In another embodiment, the exterior contour of the body generally conforms to the interior contour of the flow passage. In another embodiment, the flow passage branches to a plurality of sub-passages.

Abstract: A safety line hose to which a worker can be attached and which includes a passageway for communicating an air compressor with a pneumatic tool. The safety line includes an elongated flexible pneumatic hose, an elongated flexible tubing enveloping the pneumatic hose, and an elongated, flexible, wear resistant sheath enveloping the tubing. A compressor air hose connector is attached to the end of the pneumatic hose located at the first end of the safety line hose, and is adapted to be connected to the outlet of an air compressor hose. A pneumatic tool connector is attached to the end of the pneumatic hose located adjacent the second end of the safety line hose, and is adapted to be connected to a pneumatic tool. A fastening member is attached to the first end of the safety line hose and is adapted to be releasably fastened to a safety line attachment member.

Abstract: A motor vehicle exhaust pipe includes: an outer metal tube; at least one inner tube made from an inorganic matrix composite material and disposed inside the outer metal tube, each inner tube being arranged longitudinally and having a pre-determined longitudinal length and a gap being provided between each inner tube and the outer tube; and elements for maintaining each inner tube in position in relation to the outer tube. The elements for maintaining each inner tube in position in relation to the outer tube include at least one retaining element disposed in the gap between the inner tube and the outer tube, each retaining element exerting a minimum pressure of between 10?4 MPa and 10?1 MPa on the inner tube. All of the elements used to maintain one inner tube in position have a cumulative longitudinal length equal to less than half of the longitudinal length of the inner tube.

Abstract: A solar air conditioning device (100) comprises a solar collector assembly (30), an inlet assembly (10) at an entrance of the solar collector assembly, and an outlet assembly (50) at an exit of the solar collector assembly. The solar collector assembly includes a heat-absorbing set (31) and a transparent panel (38) being assembled to a top of the heat-absorbing set. The heat-absorbing set comprises a plurality of heat-absorbing units (32) engaged with each other. The heat-absorbing set defines an air channel with the transparent panel and a heat-absorbing channel below the air channel. The inlet and outlet assemblies are in fluidic communication with the heat-absorbing channel.

Abstract: A plurality of interchangeable straight and curved short cylindrical module segments are selectively and releasably joined together end-to-end manually and rotated relative to one another to form full-scale three-dimensional models of desired complex shapes of tubing, pipe, and conduit configurations. The segments are provided in sets having outside diameters corresponding to the outside diameters of conventional tubing, pipe or conduit and have a circumferential scale at each end to visually determine the relative rotation between one segment and an adjoined segment. When assembled, the model provides accurate shapes and dimensions to aid in designing, laying out, cutting, and fabricating tubular members, and for forming tubular configurations from pre-bent metal tubular sections and the proper relative rotation between them.

Abstract: A unitary conduit for transporting a fluid is described, the conduit comprising a body and a flow passage located within the body, the flow passage having an inlet end and an exit end, wherein the flow passage and the body have a unitary construction. In another embodiment, a unitary conduit has a flow passage wherein the cross sectional shape of the flow passage changes from a first cross sectional shape to a second cross sectional shape. In another embodiment, the exterior contour of the body generally conforms to the interior contour of the flow passage. In another embodiment, the flow passage branches to a plurality of sub-passages.

Abstract: The present invention provides a hose. The hose comprises a through hole therethrough and defines at least one recess and at least one convex portion on an outer surface thereof. The at least one recess matches with the at least one convex portion in shape. The hose of the present invention is used to sheath a surface of an object so that the object can be orderly arranged through interconnection of the at least one recess and the at least one convex portion on the outer surface of the hose.

Abstract: A pipeline configuration for the transport of a liquid, especially petroleum, contains a pipeline laid above ground, beneath which is disposed a sensor line for detection of a leak, extending along the pipeline in its longitudinal direction. The sensor line is disposed in a catchment container, fixed to the pipeline and likewise extending along it, at its lowest point. The catchment container has side edges running in the longitudinal direction and have a spacing from the outer surface of the pipeline. Inside the catchment container a device is disposed to reduce an air flow moving between the catchment container and the outer surface of the pipeline transversely to its longitudinal direction.

Abstract: Compositions and methods keep cords, such as electrical connectors for computers and home entertainment systems, tidy and organized with clasp members that run at least partly along the exterior cord surface. Cords may be optionally coupled to other cords in a concatenated arrangement, for example, and cords may be coupled to one or more objects such as a desk or a cabinet. A cord coupled to another cord or to an object may be optionally decoupled from the other cord or from the object.

Abstract: An inner-space-sectioned tube wherein, in manufacturing the tube having four or more independent fluid channels formed inside thereof, while at least two lengths of inner tubes are set to inscribe an outer tube, cold working is applied, which is a simple manufacturing process, thereby enabling to reduce the number of cold drawing passes and allowing the inner space of the tube, even if the outer tube is small in size, to effectively be allocated for four independent fluid channels. Further, this inner-space-sectioned tube adopts a simple tube structure wherein the number of constituting members is reduced, thereby enabling to reduce weight while ensuring tube strength and to achieve further reduction of manufacturing costs.

Abstract: A flat pipe with variable flow capacity comprises a main body shaped as a flat tube wherein opposing ridges are installed at the inner upper and lower positions of the main body, and thin-film spacers are installed between said pairs of ridges, forming multiple passages in the main body. Due to the flexibility of the thin-film spacers, the passages of the main body may stretch to a larger diameter to adjust to increased flow. If the flow is significantly enlarged, the main body will flex at the ridges causing the thin-film spacers to separate which in turn opens flow to the main body, essentially creating one main passage with a large diameter. When flow is stopped or decreased, the main body will restore elastically and resume shape as a flat pipe. According to the above, the present invention discloses a pipe which is easily stored and prevents twisting which could result in deformation, breakage and flow interference.

Abstract: A water supply line includes a cylindrical and ductile outer tube that has a centrally aligned axis. An inner tube is concentrically spaced about the axis of the outer tube and has a length coextensively sized therewith. The inner tube is equidistantly spaced inward from the outer tube, defining a cavity therebetween. Fingers are intercalated between the inner and outer tubes and seated within the cavity. The fingers extend outward from the inner tube and are positioned along the entire length of the tubes, defining isolated air chambers which act as a thermal blanket, preventing cold air from passing into and hot air from exiting the inner tube. A coupling is provided with a bore and is in fluid communication with the inner tube and conjoinable therewith. The coupling has an outer surface provided with barbs such that the coupling can be connected to the inner tube.

Abstract: A synthetic resin pipe insert for insertion in an existing pipe or for use in the manufacture of new pipe to form a multi-channel pipe. The insert has a curved cross sectional configuration which defines a segment of a circle with a convexly curved radially outer wall and a concavely curved radially inner wall and a plurality of radial walls extending between the curved, radially inner and outer walls to form at least two linear channels. A curved inner pipe member may optionally be fitted against the concavely curved radially inner wall. The pipe insert of the invention facilitates multiple utility connections, such as cable TV and sewer, in a single pipe assembly.

Abstract: A peritoneal dialysis catheter having an inflow conduit and an outflow conduit. Each conduits are linearly mated and contoured to cooperatively define a substantially circular cross sectional profile along a medial, trans-abdominal segment, but separating perhaps in radial fashion on either end of the medial, trans-abdominal segment, on a distal end to join fluted fluid transport branches and on proximal ends to join fittings for fluid delivery and collection external of the patient.

Abstract: A peritoneal dialysis catheter having an inflow conduit and an outflow conduit. Each conduits are linearly mated and contoured to cooperatively define a substantially circular cross sectional profile along a medial, trans-abdominal segment, but separating perhaps in radial fashion on either end of the medial, trans-abdominal segment, on a distal end to join fluted fluid transport branches and on proximal ends to join fittings for fluid delivery and collection external of the patient.

Abstract: A flexible fire resistant innerduct structure is configured to contain a cable within a conduit. The innerduct structure includes a pair of adjacent strip-shaped layers of flexible material that are joined along their longitudinal edges to define a channel through which the cable can extend longitudinally through the innerduct structure between the layers. The adjacent layers have differing widths between their longitudinal edges, whereby the wider layer bulges away from the narrower layer to impart an open configuration to the channel. Other features of the innerduct structure relate to the material of which it is formed. Such features includes the structure of the material, such as a woven structure, and further include properties such as melting point, tensile strength, fire resistance, elongation, coefficient of friction, crimp resistance and compression recovery.

Abstract: The invention is of an improved peritoneal dialysis catheter the structure of which permits simultaneous inflow and outflow therapy. The design eliminates angular deviations of conduits to prevent occlusion through biological debris, insures optimal seating and sealing in the abdominal wall, and, to previously proposed designs for similar devices, is possible to manufacture using existing technology and manufacturing techniques.

Abstract: A system, device and method are claimed for installing electrical switches and electrical plug connectors in a wall, without the use of junction boxes. The system uses prefabricated switch assemblies and/or receptacle assemblies. These assemblies contain either a switch or a receptacle that is manufactured into a housing. On the rear of the housing are one or two protrusions. Wire connector ports are disposed within the areas defined by the protrusions. The wire connector ports are coupled to either the switch or receptacle within the housing. To install an assembly, at least one hole is drilled into a wall and a cable run through the hole. The wires from the cable are stripped and inserted into the wire connector ports within the protrusion on the rear of the assembly. The protrusion is then inserted into the hole in the wall and the assembly is mounted flush on the face of the wall.

Abstract: Water hose with internal partitioning plates, including a main body and at least one support section. The main body is a hollow tube body made of soft material with a predetermined length. One side of the support section is fixed on a predetermined portion of inner wall of the main body to divide an interior of the main body into at least two passages communicating with each other. The support section is a polygonal body with a length corresponding to that of the main body. After wound, the water hose has small volume without occupying much space and the passages are not compressed, still permitting the water to flow therethrough. After the water hose is pulled out by a certain length and the water flows therethrough, the water pressure makes the pulled out section of the water hose expanded into a circular tubular shape for a user's hand to easily hold.

Abstract: A flexible fire resistant innerduct structure is configured to contain a cable within a conduit. The innerduct structure includes a pair of adjacent strip-shaped layers of flexible material that are joined along their longitudinal edges to define a channel through which the cable can extend longitudinally through the innerduct structure between the layers. The adjacent layers have differing widths between their longitudinal edges, whereby the wider layer bulges away from the narrower layer to impart an open configuration to the channel. Other features of the innerduct structure relate to the material of which it is formed. Such features includes the structure of the material, such as a woven structure, and further include properties such as melting point, tensile strength, fire resistance, elongation, coefficient of friction, crimp resistance and compression recovery.

Abstract: A conduit assembly for a partition for receiving wires, hoses, or cables. The conduit assembly includes passages and foaming material, which expands on the outer surface of the conduit assembly. The conduit assembly is arranged in a through hole, which is formed in the partition. The foaming material expands when heated, thus fixing the conduit assembly in the partition. The conduit assembly further includes spare passages. Detachable plugs close the spare passages. When adding more wires, hoses, or cables to the conduit assembly, the plugs are removed.

Abstract: A peritoneal dialysis catheter with two, linearly mated conduits contoured to cooperatively define a substantially circular cross sectional profile along a medial, trans-abdominal segment, but separating on either end of the medial, trans-abdominal segment, on a distal end to join fluted fluid transport branches and on proximal ends to join fittings for fluid delivery and collection external of the patient.

Abstract: A duct (10) is made up of a plurality of layers (11, 12, 13) of pliant material. The layers (11, 12, 13) are attached by stitching (20, 22) to form pockets (23, 24) between adjacent layers. One of the layers (11) is wider than the others and extends over the lateral edges (17, 19) of those layers (12, 13), and when the stitching (22) is applied, a loop (21) is formed. The loop (21) receives a strength member (26) which may be engaged by a clamp (31) carried by a bracket (34) which may be attached to a utility pole (30) to carry the duct (10) overhead. In another embodiment, a duct (40) includes enclosed loops (41, 42, 43) forming pockets (50, 51, 52). Stitching (54) connects the loops (41, 42, 43) and forms another loop (55) to receive a strength member (56). In yet another embodiment, the layers (61, 62, 63 and 64) are of different lateral widths, and the longest layer (64) extends around one of the edges of the other layers (61, 62, 63) to form a loop (71) when stitching (65) is applied.

Abstract: A plastic cross car beam for a motor vehicle includes first and second members joined together at sealing points to form at least two ducts. The cross sectional shapes of the ducts are essentially constant along the length of the cross car beam and shaped to provide structural support for various types of loadings. Each duct is provided with at least one inlet, aligned with an HVAC assembly, and one outlet, aligned with a vent or register. Preferably a support member, which is integral with one of the members, extends downward from one of the ducts and supports an HVAC case. Also, preferably, the support member is provided with a pocket for receiving an energy absorbing bracket.

Abstract: A fluid conveying tube for a vehicle cooler comprises at least two longitudinal ducts, each comprising two opposite, longitudinal primary heat exchange surfaces. At least one primary surface in each duct of the tube has a projecting surface structure. In a method of manufacturing such a tube, starting from a blank, use is made of a device, which has a feeder for feeding the blank through the device and a surface forming station for forming the surface structure on a portion of the blank surface. Furthermore, the device comprises an edge forming station for forming two opposite edges of the blank into two upright edge portions, which between themselves define an at least partly essentially flat web portion. In addition, the device comprises a duct forming station for making the edge portions abut against each other and against the web portion with a view to defining said ducts.

Abstract: The present invention relates to a duct and ventilation system for livestock production buildings. The building comprises a plurality of containment rooms for livestock, a pit beneath the room, an attic above the rooms, a ventilation duct for each room and a ventilation house coupled to the pit. The containment rooms have slatted floors. The attic includes a vent. Each ventilation duct includes a manually actuable air flow control valve. The ventilation house includes an exhaust fan and is adapted to draw air through the vent and through the attic to one of the ventilation ducts and into one of the rooms through the slatted floor and out via the ventilation house. The building may include a manifold area adjacent the rooms and in fluid communication with the attic.

Abstract: A sewer pipe structure and associate method of construction includes a storage tank connectable to an inflow pipe to receive an inflow of sewage and connectable to an outflow pipe through which the sewage can exit the storage tank. The sewer pipe structure is formed from modular prefabricated sections, including a prefabricated storage pipe section having a cross-sectional area greater than the cross-sectional areas of the inflow and outflow pipes and forming at least part of the storage tank, a prefabricated inflow end cap section fastenable to a first end of the sewer pipe structure to thereby close the first end of the pipe structure, and a prefabricated outflow end cap section fastenable to a second end of the sewer pipe structure to thereby close the second end of the pipe structure. The inflow and outflow end caps include respective connecting means for allowing sewage flow through the pipe section.

Abstract: Devices and systems for housing cables and conduits. An exemplary cable tray is described having a number of interconnectable base members fashioned of pliable elastomer that are designed to be disposed upon a rooftop, floor or other support surface. The base members each contain a number of channels within which cables or conduits are disposed. Separate grooves are provide to retain ground wires. The base members may be formed to provide straight runs, angled turns or T-connection sections that are used as intersections. Cover pieces, also fashioned from pliable elastomer are removably affixed to the base members to enclose the cables or conduits. It is currently preferred to fashion the base member and cover components of the cable tray from crumb rubber or other recycled rubber. The components may thus be easily colored during manufacture. This same material is used for fabrication of interconnectable elements used to create walkways in accordance with the present invention.

Abstract: A multi-lumen hose including a corrugated peripheral wall including an interior area and having an inner surface which defines a diameter, and at least one substantially planar inner partition extending from the inner surface across at least half of the diameter of the peripheral wall so as to divide the interior area into a plurality of lumen and methods of manufacturing such hose.

Abstract: A multi-lumen hose including a corrugated peripheral wall including an interior area and having an inner surface which defines a diameter, and at least one substantially planar inner partition extending from the inner surface across at least half of the diameter of the peripheral wall so as to divide the interior area into a plurality of lumen.

Abstract: A conduit assembly for a partition for receiving wires, hoses, or cables. The conduit assembly includes passages and foaming material, which expands on the outer surface of the conduit assembly. The conduit assembly is arranged in a through hole, which is formed in the partition. The foaming material expands when heated, thus fixing the conduit assembly in the partition. The conduit assembly further includes spare passages. Detachable plugs close the spare passages. When adding more wires, hoses, or cables to the conduit assembly, the plugs are removed.