Abstract: A pipe fitting 10 is used for connecting a large-diameter pipe and a small-diameter pipe each having a flange portion at pipe end. The pipe fitting 10 includes a pair of side pieces 12, a connecting piece 11 and a support portion 15. The side pieces 12 are disposed to face each other, and each has a fitting hole portion 13 in which the flange portions are to be inserted in a state in which the large-diameter pipe and the small-diameter pipe are connected. The connecting piece connects the side pieces 12 at each of end portions. The support portion 15 is formed at each side pieces 12 in a manner to be orthogonal to the side pieces 12 and to be faced each other.

Abstract: A connector for connecting two tubular members has a pin and a box, the box having a bore that receives the pin in stabbing engagement. The bore having a grooved profile, and a split lock ring mounted to the pin, the lock ring snapping into engagement with the grooved profile in the box when the box and pin are stabbed together to lock the tubular members together. An annular wedge shoulder is located on the pin axially spaced apart and facing a rim on the box. The wedge shoulder and rim are inclined relative to each other, resulting in a closer axial distance between them at outer diameters of the pin and box than farther inward. An annular recess is located on the pin at an inner portion of the wedge shoulder, the recess having an inner wall facing outwardly.

Abstract: A fluid transfer device includes a first section and a second section. The first section includes a first flange with a first fastener on an outer diameter of the adapter. The fluid transfer device includes a coupler secured to the second section to rotate independently of the second section and to mate with an end of the first section. The coupler includes a second flange with a second fastener on an outer diameter of the coupler. A support couples to the first and second fasteners of the flanges to secure the first section to the second section and to prevent relative rotation of the flanges.

Abstract: A pipe and pipe coupling assembly (10) including a pipe (20) having a first end (72) and a pipe (22) having a second end (74). The first end (72) includes a threaded portion (60) and a keyway (32), and is adapted to slidably engage the second end (74). The second end (74) includes a key portion (36) that is adapted to engage the keyway (32), thereby impeding the rotation of the pipe (20) relative to the pipe (22). The pipe and pipe coupling assembly (10) further includes a coupling member (34) adaptable to be rotatably attached to the second end (74). The coupling member (34) further includes a threaded portion (58) operable to engage the threaded portion (60) of the first end (72), thereby removably coupling the pipe (20) to the pipe (22) in a keyed, end to end relationship.

Abstract: A coupling apparatus is disclosed. The coupling apparatus includes a first connector, a second connector and a plurality of clamp devices. The first and second connectors each have a substantially hollow interior cylindrical shape with a circumferential flange with a flat surface normal to the axis of the cylinder. The flange of the second connector has a circular diameter substantially equal to a diameter of the flange of the first connector. The plurality of clamp devices has interior dimensions substantially equal to the combined thickness of first connector flange and the second connector flange when placed together along their flat surfaces and with the cylindrical portions of the first connector and the second connector substantially oriented along the same axis.

Abstract: A fitting for connecting two components is described. The fitting may be explosion proof for use in hazardous environments. The fitting may swivel allowing fast and easy connection to fixed components, thus minimizing the time required for installation and periodic maintenance, while maintaining the integrity of the explosion proof fitting. In this way, components—such as electrical conduits containing conductors or wires—can be installed and maintained without the use of damming material. Also described is a method of installing an explosion proof fitting for use in hazardous environments.

Abstract: A quick connect/disconnect coupling having a female coupling member, a male coupling member, and a clip member slidably mounted on the female coupling member for retaining the female and male coupling members together in a coupled state. The clip member is designed to prevent inadvertent actuation thereof, thereby preventing accidental disconnection of the female and male coupling members once they are in the coupled state. The clip member must be actuated from a lock position to an unlock position before the clip member can be actuated from its connect position to its disconnect position. Thus two separate movements of the clip member are required before the coupling can be disconnected and/or connected.

Abstract: A pipe joint unit having key members which are struck to bite the surfaces of the pipes is provided with which the pipes can easily and quickly be joined to the body of the pipe joint unit with small force, without skill and regardless of the person who drive the key member. The pipe joint unit according to the present invention includes a body of the pipe joint unit having through holes each of which faces a portion of an inserted pipe in a direction of a tangent line; and key members to be driven into the through holes, wherein each of the key members has a tapered portion which is brought into contact with the surface of the pipe in an initial stage of a driving operation and which bites the surface of the pipe as the driving operation proceeds, and a secured portion to be secured to the bitten portion.

Abstract: A reel pipelay vessel is used to lay a first pipeline (6) and a second pipeline (7) subsequently. The second pipeline (7) is spooled on top of the first pipeline (6) at a shore base by use of transition joint (11) secured to the trailing end of the first pipeline (6) and to the leading end of the second pipeline (7). A variety of transition joints are described. In each case, the bending characteristic of the transition joint is selected to avoid buckling during spooling of the pipe transition. In an alternative embodiment the transition joint comprises a first pipe section (21) of first diameter hingeably connected to a second pipe section (22) of second diameter, the first and second pipe sections being bent to a common radius corresponding to the radius of curvature of the first pipe when spooled onto a reel.

Abstract: A pipe lap joint is disclosed with an improved sealing zone and which comprises a pair of end-to-end intersecting slots in the outer pipe which allow the sealing zone to be collapsed against the inner pipe by a band clamp around the outer pipe. The outboard slot extends inwardly from the end of the pipe and the inboard slot is circumferentially offset and extends inwardly from the outboard slot. A frangible bridging segment of the wall of the pipe extends between the adjacent walls of the two slots and is deformed or fractured and maintains isolation between the slots when the pipe is collapsed. To facilitate collapse of the outer pipe, the length of the inboard slot is maximized for increased leverage of the clamping force.

Abstract: A reusable sealed coupling for joining a first pipe having a first internal diameter adjacent a first end thereof which is substantially equal to an outer diameter of a second pipe, the coupling comprising: a coupler capable of receiving the first end of the first pipe within a first portion thereof and an end of the second pipe within a second portion thereof so that the coupler, second pipe, and first pipe achieve mutual overlap in at least one region. The first and second pipes are both set into predetermined positions with respect to the coupler and with respect to one another; and a seal between the coupler, second pipe, said first pipe is created in at least a portion of the region of mutual overlap.

Abstract: A method of forming a coupling or connecting a composite drive shaft to an annular member comprising the steps of locating the shaft over the member and injecting adhesive through holes in the shaft to bond the shaft to the member.

Abstract: There are disclosed several embodiments of a connector for connecting tubular members in end-to-end relation wherein a ring supported by the one tubular member carries arcuate latches which are adapted to be moved by radial actuators into and out of positions in which locking shoulders thereon are tightly engaged with a complementary locking shoulder about the other tubular member to hold the members in end-to-end relation.

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 conduit coupling device includes a tubular casing with front and rear sections of reduced and enlarged diameters. A pair of relatively diametrically movable arcuate clamp members of channel shape with cross webs and flanges is provided, one of the webs having peripherally extending tongues slidably engaging the other clamp member channel. A radial screw engages a tapped bore in the casing rear section and bears on and is clinched to one of the clamp member webs the other clamp member being fixed to the casing. A pair of the casings may be integrally coaxially formed and house similar clamp assemblies or the casing may terminate in an externally threaded coupling tube projecting coaxially forward from the casing front section.

Abstract: A one piece female coupling member (24) having a front end and back end, the female coupling member (24) defining a path (34) for the flow of fluid therethrough. A male coupling member (22) having a front end and a back end and defining a path (32) for the flow of fluid therethrough, the front end of the male coupling member (22) being insertable into the front end of the female coupling member (24). A seal (36) cooperates with an external surface of the male coupling member (22) and an internal surface of the female coupling member (24) for providing a fluid tight seal therebetween. A one piece quick connecting/disconnecting clip member (26) is slidably mounted in a slot (58) of the female coupling member. The clip member (26) is slidable between a connecting position wherein it engages the male coupling member and a disconnecting position wherein it is disengaged from the male coupling member, the clip member (26) being biased toward the connecting position by a resilient biasing member ( 74).

Abstract: A one piece female coupling member (24) having a front end and back end, the female coupling member (24) defining a path (34) for the flow of fluid therethrough. A male coupling member (22) having a front end and a back end and defining a path (32) for the flow of fluid therethrough, the front end of the male coupling member (22) being insertable into the front end of the female coupling member (24). A seal (36) cooperates with an external surface of the male coupling member (22) and an internal surface of the female coupling member (24) for providing a fluid tight seal therebetween. A one piece quick connecting/disconnecting clip member (26) is slidably mounted in a slot (58) of the female coupling member. The clip member (26) is slidable between a connecting position wherein it engages the male coupling member and a disconnecting position wherein it is disengaged from the male coupling member, the clip member (26) being biased toward the connecting position by a resilient biasing member ( 74).

Abstract: A non threaded pipe connecting system for connecting pipe without the use of threads comprising; a first pipe member; a second pipe connector member having at least two slots formed therein and an inside diameter larger than the outside diameter of the first pipe member for receiving and snugly fitting about the outside diameter of the first pipe member; at least one o-ring mounted between the first and second pipe members for forming a seal therebetween and; a U-shaped clip member having generally parallel legs for being driven along the slots of the second pipe connector member on the outside of the second pipe member for sharply deforming the surface of the first pipe member on at least two sides and for forming an angle with said first pipe member along the sharply deformed area on the first pipe member for preventing the first pipe member from moving after insertion into the second pipe connector member.

Abstract: An interchangeable, sectional mining drill and bolt driver system for use with a drilling machine, includes a chuck, a driver, a bolt wrench-drill steel driver, a combination driver, a male hex coupler, a female hex coupler, a universal bar, a flat spring-double dimple clip, and a drill bit. The system can be converted from a vacuum debris removal system to a water debris flushing system by connecting a main water valve to a water system base and inserting a first water valve, a second water valve, and a finishing water insert into respective sections of the mining drill system.

Abstract: An improved quick connector substantially simplifies string make-up by eliminating the need for a perfect longitudinal alignment between adjacent sections before engagement. An elongated recess in either the pin or box connector permits the pin to be inserted into the box at an angle. Interaction between the recess face and a surface on the opposite connector causes the pin to automatically align with the box. When the pin reaches its fully engaged position in the box, a spring tension snap lock ring having multiple annular teeth meshes with complementary grooves to lock the pin and box together.

Abstract: The invention concerns pipe joints in which an improved locking segment has an outwardly extending protrusion which is adapted to abut a circumferential wall in the bell end of a pipe which telescopically receives a second pipe.

Abstract: A separation preventive pipe joint comprises a socket and a spigot inserted into the socket with an annular packing interposed therebetween. An annular gland connected to the socket has an axial packing presser projection and is internally provided wtih an annular receptacle groove. Arcuate engaging segments are incliningly disposed in a circular arrangement within the receptacle groove and retained there by elastic distancing members. The engaging segments are radially inwardly pressed by pressing bolts to engage in the spigot outer periphery. Each engaging the segment elastically deforms in a manner of a Belleville spring in response toseparating movement of the spigot to assume a posture generally perpendicular to the spigot outer periphery so that the engaging element engages in the spigot outer periphery more firmly.

Abstract: A connecting device includes, a female element constituted by a socket 1 and a male element having a spigot which is adapted to be inserted in a complementary chamber in the socket 1. Disposed in the chamber is a cavity which receives a resilient retaining member 16. The spigot 16 has a recess in which a portion of the retaining member is received when the spigot is inserted in the chamber.

Abstract: A pipe lap joint is disclosed with an improved sealing zone structure in the overlap region of the pipe. The sealing zone comprises a pair of end-to-end intersecting slots which are covered by a clamping band and which allow the sealing zone of the pipe to be collapsed against the inner pipe when the clamping band is tightened. The outboard slot extends inwardly from the end of the pipe and terminates in a transverse end wall within the overlap region. The inboard slot is circumferentially offset from the outboard slot and extends inwardly from an outer end wall thereof. The adjacent sidewalls of the slots are in substantial alignment with each other and the end walls are also in substantial alignment with each other whereby the end walls of the slots are disposed in edge-to-edge engagement with each other when the overlap region of the outer pipe is collapsed into close fitting engagement with the inner pipe.

Abstract: An airspring with plastic rigid components having a specialized coupling adapted for push-in engagement of the pneumatic tubing into the airspring is disclosed. The coupling requires no threading in the plastic structural component of the airspring and is composed of an outer ring through which a coaxial annular sleeve with jaws for tubing engagement slides axially. An O-ring seals the tubing against air leaks. The airspring may be used for vibration isolation or load suspension.

Abstract: A pile driving connector device comprising a tubular pin member for telescopic connection with a corresponding box member with the pin member having a wall with a locking groove in the outer face thereof adapted for operational engagement with a locking ring and a bearing surface adapted for driving engagement with the bearing shoulder of a corresponding box member, a tubular box member having a bore for receiving the pin member, a counterbore configured to be adjacent to the locking groove of the pin member and a bearing shoulder adapted for driving engagement with the bearing surface of the pin member, and a conically shaped locking ring coaxially mounted within the counterbore of the box member having a base portion detachably connected to the box member and a upper portion adapted for engagement with a side surface of the locking groove upon insertion of the pin member into the box member for interlocking connection of the pin and box members.

Abstract: A staple coupling of the kind comprising interfitting male and female members for the connection of a hose within a fluid system, the members including respective external and internal circumferential grooves which register with one another when the members are fully engaged and holes on the female member to receive a staple, the holes being positioned and arranged so that when the staple is inserted into the holes the staple engages the registering grooves on the members to prevent separation of the members; a sealing O-ring provided on at least one of the members to provide a fluid tight seal between the members, and a generally U-shaped staple to prevent separation of the members; wherein at least one of the staple, the circumferential groove and the holes to receive the staple is shaped so as to allow limited axial movement of the male and female members in a separating direction to a locked position when the staple is fully inserted whereby the staple cannot be removed until the members are moved back to

Abstract: A bell and plain end pipe joint are provided wherein the plain end has a raised portion on its outside diameter. A series of locking segments fit into a circumferential groove in the bell of one pipe and engage both the raised portion on the plain pipe and a portion of the bell. Upon an increase in fluid pressure in the pipes, the pipes tend to separate axially and the locking segments also contact and bear against a different portion of the bell. The joint provides a novel means of distributing the axial thrust tending to separate the pipe being joined.

Abstract: A method and apparatus of making up and sealing between threaded sections of a well tool such as a safety valve. The female connection includes an end on one side of its thread and a shoulder on the other side of its thread and the male connection includes an end on one side of its thread and a shoulder on the other side of its thread. A soft metal seal is positioned between the end of the male connection and the shoulder on the female connection for sealing between the connections when the connections are threaded together. A hole is drilled in the made-up connection through the shoulder of the male connection and the end of the female connection and a plug is positioned in the hole with a force fit for maintaining the rotational and longitudinal alignment of the made-up connection. Preferably the metal seal is supported by a recess on one of the connections and a taper on the other of the connections. The plug may include a connection for removing the plug.

Abstract: A connecting nipple for engagement with a tubular member having a circumferential surface with a locking groove therein comprises a tubular part with a wall having an outer recess on its circumference and a bore intersecting the recess extending through the wall. A locking member is engageable in the recess and has a projecting portion engageable through the bore to the locking groove. A resilient deflecting portion is defined between the recess and the bore which must be displaced to permit insertion of the locking member and which effects the holding of the locking member in a locking position after it is inserted.

Abstract: Compact, low cost connector system for flexible tubing is adapted to removably connect a length of flexible plastic tubing for rotational but not axial movement to a recessed opening in a body member such as a pneumatic valve, a fitting, or an air cylinder. Preferably, a cylindrical sleeve member having transverse slots extending completely through opposed walls of the member is pre-positioned in a stepped recessed opening in axially spaced relationship with an elastomeric O-ring sealing member. The sleeve member is preferably retained in a fixed relation relative to the body member by a U-shaped clip. When one desires to attach a length of tubing, the U-shaped clip is removed and the tubing is inserted into the sleeve and O-ring such that its tip portion goes beyond the O-ring into a small central recessed aperture formed in the body member.

Abstract: A branch pipe part is provided with a collar and a downwardly extending skirt, the free end of the branch pipe part comprising a first outwardly extending projection and the lower portion of said pipe part being provided with longitudinal incisions allowing deformation of said lower portion.The outer wall of the space formed by collar and skirt may have apertures for passing a lip of a sealing member. In order to avoid further deformation of the lower portion with incisions after connection with a main conduit, a deformation-preventing bush is pushed into the lower portion and locked by means of a cam.For decreasing the distance between the outer side of a main conduit connected with the branch pipe part, the skirt may be provided with a removable adapting ring, an intermediate part thereof decreasing the distance between the outer side of the main conduit and the free lower end of the skirt.

Abstract: A pipe connecting arrangement involves two pipes of different diameters which are inserted into one another with radial play. The radial space between the two pipes is filled with a packing sleeve and the connection is completed by one or two U-shaped tension hoops inserted through one or two slots in the larger diametered pipe and engaging the packing sleeve.

Abstract: An irrigation system is constructed from PVC pipe which is tapped into a main waterline buried beneath the surface of the earth. The main waterline is constructed from sections of plastic irrigation pipe having male and female coupling ends, and holes are drilled in the coupled portions of the main waterline pipes so as to permit insertion of water distributing PVC pipes. By drilling the holes in the coupled portions of the main waterline, a double wall thickness is provided for strength into which is insertable PVC nipples which in turn are connectible to PVC risers extending above the ground. PVC emitter pipes may then be connected to the risers through the use of nipples or alternatively, the emitter pipes and risers may be of a unitary, integral construction. A plurality of orifices are provided in the emitter pipes so as to facilitate the distributing of water across the surface of the ground.

Abstract: An artillery shell is provided comprising two sections having complementary oupling members for connecting the sections together. The complementary coupling members include at least two locking assemblies which can be engaged to prevent relative axial movement of the coupled sections or disengaged to permit the disconnection of the sections. As a result, the sections can be connected and disconnected for different mission requirements and for inspection purposes.

Abstract: A slip-on type pipe joint including a socket, a spigot and an annular rubber packing disposed on the inner periphery of the socket at an axially intermediate portion thereof and compressible by the outer periphery of the spigot against the inner periphery of the socket to seal the clearance between the socket and the spigot with its restoring force. The joint further comprises an engaging member detachably attached to the inner periphery of the socket at its open end and radially inwardly projecting from the periphery, a protrusion formed on the outer periphery of the spigot and positioned between the packing and the engaging member, and a split lock ring disposed between the protrusion and the engaging member and fitting around the spigot with a diametrically contractive force. The lock ring is engageable with the engaging member and with the protrusion to prevent the spigot from slipping off the socket.

Abstract: A plastic conduit section of the bell and spigot variety for protecting electrical and communications cable, featuring paired, parallel, ridged spigots or channeled spigots, slotted bells, and resilient tie rods or keys to join adjacent conduit sections together. Interrupted peripheral keyways and resilient keys are used to join adjacent conduit sections together. These conduit sections may be internally divided into smaller subcompartments. A circumferential gasket seals the joint between the spigot and the bell ends. Flanged end surfaces limit axial movement and deflection. Lipped ends index and seat adjacent conduit sections for subsequent joining.

Abstract: An improved coupling for the core of a heated rotatable member and the support and drive for the core. The core has a surface including a first wall and a second wall spaced from and angularly disposed to the first wall which define a groove in the surface. Drive means, such as an end gudgeon, is mounted in juxtaposition with the groove for supporting and rotating the core. The coefficient of thermal expansion of the drive means is different from that of the core. A coupling, which compensates for unequal thermal expansion or contraction of the drive means and the core, has a first portion engaging the drive means to maintain support and rotation of the core by the drive means. The coupling further has a second portion extending at least partially into the groove spaced from the first wall to accommodate for movement between the drive means and the core resulting from unequal thermal expansion or contraction because of temperature change.

Abstract: An insulated conduit composed of an inner structural tubing with each length or bend of said tubing having a bell socket at one end with a matching spigot joint at the other end, and so arranged that one is enabled to assemble comparitively long continuous lengths of the insulated conduit. Resting blocks are placed at appropriate position and distances within the inner structural tubing whereby energy carrying piping may be inserted within the inner structural tubing and rest upon said blocks. The energy carrying piping is protected from loss of heat energy by the insulative value of the ambient air within the inner structural tubing and also by the inclusion of inert air spaces located between a series of structural ribs which form a support between the inner structural tubing and an outer insulation jacket.

Abstract: The device is provided for a coupling which comprises an annular sealing element interposed and compressed radially between the socket of one pipe element and the male end of the other pipe element. The pipe elements are capable of having an angular deviation therebetween. The device comprises an annular shoulder integral with the male end which shoulder is disposed, in the assembled state of the coupling, between an inner flange at the entrance of the socket and the sealing element. A split ring surrounds the male end between the flange and the shoulder. Screws engaged with and extending through tapped passages arranged circumferentially around and carried by the flange bear against a face of the shoulder so as to apply the ring against the shoulder.

Abstract: An inner conduit is received in an outer conduit in overlapping relationship. A locking member is received in the outer conduit for lateral shifting into locking engagement with the inner conduit. There are two spaced apart abutment surfaces on the outer conduit, and a toggle member is received in the outer conduit. When the toggle member is expanded, a clamping force is exerted from one of said abutment surfaces to the other through the locking member and the inner conduit, to hold the conduit members tightly together. The locking member and the toggle member can be operated by manual screws, or by a piston powered cam. Seals can be inserted between the inner and outer conduits to establish a fluid-tight seal.

Abstract: A connector for securing adjacent pile sections, or other pipe sections, to each other, including a box disposed over a pin, with the end of the box engaging a companion pin shoulder, the pin and box being rigidly secured together by a plurality of lock dogs forced radially within companion grooves in the pin, the dogs and grooves having coengaging cam surfaces exerting an axial thrust between the box end and pin shoulder upon inward movement of the dogs, to provide a large bearing area and preload between the pin and box under substantial compression to prevent separation between the pin and box due to rebound during the pile driving operation.

Abstract: A releasable tube coupling wherein the tube is releasably retained in the coupling body by means of a coil spring which embraces the outer cylindrical surface of the tube. In the relaxed condition, the spring has an inner diameter less than and frictionally engages the outer diameter of the tube. When an axial outward force is applied to the tube the spring tends to contract as it elongates and more firmly grips the tube. The spring is axially compressible to insert the tube in the fitting body and to release it therefrom.

Abstract: A method of depositing pipe on the seabed which includes providing a vessel of a length greater than the pipe, which vessel has a main winch on one end and an auxiliary winch on the other end, anchoring a cable from the main winch to the seabed, drawing the cable horizontally of the vessel utilizing the auxiliary winch, attaching trolleys carried by a length of pipe to the section of the cable overlying the vessel, using the auxiliary winch to let out the cable and suspend the pipe on the cable from the main winch, utilizing a third cable to lower the pipe, and repeating the process for each length of pipe.

Abstract: A tubular connector sleeve has a radially outwardly projecting inwardly open groove formed at one end which is defined by a radially outwardly projecting wall and a radially inwardly projecting flange at the end of the sleeve. A portion of the flange is cut away to provide access to the groove. A connector tube has a radially outwardly projecting flange at one end and the outside diameter of this flange is generally equal to the inside diameter of the connector sleeve so that the flange on the connector tube can extend inside the connector sleeve. A spiral lock ring is wound through the opening in the sleeve flange until the entire spiral lock ring is in the groove.

Abstract: A locking means for securing pipe segments in end-to-end relationship wherein at least one pipe segment is slidably disposed within a sleeve member, and having cooperative grooves provided in the pipe segment and the sleeve member to provide an annular chamber when the pipe segments are coupled. A plurality of circular disc members having a diameter substantially equal to the sum of the depth of the grooves are inserted in the annular chamber for locking said coupling in place and providing high load capabilities with ease of coupling and uncoupling.

Abstract: A pipe coupler has male and female portions each adapted for attachment as by welding or the like to the ends of pipe lengths. The male element, which is non-circular in cross section, telescopes into a like configured bore in the female portion, with the forward end of the male coupler abutting an internal step of a female coupler. A pair of keys fit within parallel slots on opposite sides of the female coupler, and in position in aligned recesses provided in the male coupler. First and second edges of the key blocks are disposed at a small angle to each other, so that the keys may be wedged tightly into place holding the male and female couplers in fluid tight sealing relationship.

Abstract: A method for coupling tubes. One tube has a female coupler member at one end and the other tube has a male coupler member that is inserted into the female coupler member so that the outer surfaces join along a regular path. Then wire is wrapped around the joined couplers.

Abstract: An outlet for underfloor and concealed installations for insertion into a tubular opening in concrete or flooring finish, which includes a hollow tubular body having its lower outer edge bevelled against which a correspondingly bevelled portion of a split clamping ring is pressed and frictionally held by means of screws.