Abstract: An annular metal-to-metal sealing system, for use in wellhead systems and having many other uses, has a metal member defining an annular internal or external sealing surface for which sealing is intended. An annular seal body composed of high strength metal material is positioned in concentric relation with the annular sealing surface and is sufficient flexible to become spring loaded, typically during assembly, for continuous application of a spring force. The annular seal body defines one or more annular seal retainer grooves each having an annular soft metal sealing insert therein, with a portion thereof exposed for sealing engagement with the annular sealing surface. The spring loaded characteristic of the annular seal body applies constant force to maintain the soft metal seal insert in constantly energized sealing relation with the annular sealing surface and maintains effective sealing even when dimensional changes to the sealing surface occur due to temperature or pressure changes.

Abstract: A device for coupling tubular members including a sheet member having a first end and a second end where the first end and the second end are operatively arranged to overlap one another to form a substantially cylindrically shaped coupling, an abutment member mounted to the sheet member proximate the second end thereof, a male threaded member, a female member pivotably mounted proximate the first end of the sheet member and arranged for pivoting rotation about a pivot point, where the female member is arranged to threadably engage the threaded male member, and the male member is operatively arranged to abut the abutment member, wherein the male threaded member is operatively arranged to rotate in a first direction to abut the abutment member and expand the substantially cylindrically shaped coupling.

Abstract: A 90° swivel connector capable of rotating 360° has threads on one end that screw into a threaded hole in a boss on a compressor portion of a turbocharger and has barbs on the other end of the swivel connector for receiving and retaining a hose. The 360° rotation enables alignment of the swivel connector with the hose to prevent kinking of the hose when the relative angular position of the connector and hose is varied to facilitate diverse engine usage.

Abstract: An air duct connector is used to create an air-tight connection for duct work. A method of using the air duct connector includes cutting a strip of an air duct connection gasket along a first start edge. The strip is adhesively attached around a metal connector band such that the air duct connection gasket fully encircles the metal connector band and an adhesive attachment is formed with an adhesive backing. The strip is cut along a second close edge which matches the first start edge and the strip is positioned such that the first start edge mates together with the second close edge at a sealing seam. The air duct connection gasket includes a first sheet section extending generally in a planar sheet between a first side edge and a first central edge. The first sheet section has a first sheet width which is substantially wider than a first sheet thickness. A first sealing rib extends longitudinally on a front face of the first sheet section and defines a flexible fin.

Abstract: A pipe coupling according to the invention comprises a socket (2) of glass-fiber reinforced plastics material and a membrane (4) of elastic material which is formed at at least one end as a seal and comprises a sleeve section (8). Where the membrane is formed as a seal, it has at the end where the pipe (20) is to be introduced (thus at the outer end), a short cylindrical band (14). In the cylindrical band the membrane has a constant wall thickness, which is backed by the glass-fiber reinforced socket material of the pipe coupling.

Abstract: An air duct installation joins the ends of two air ducts together using a self-seal coupling connector. The coupling connector has a band with first and second edges and inside and outside surfaces. First and second gaskets are provided, with each gasket being wrapped around a respective edge of the band. Each gasket has a first portion that is interposed between the band and the respective air duct. The first portion of each gasket has seals or lips that extend into contact with the respective air duct. In addition, the first portion of each gasket has a bead that serves as a mechanical stop. The air duct is installed by sliding onto the gasket, wherein the end of the air duct contacts the bead. In addition, the first portion of each gasket is inclined between the lips and the bead. This inclination results in an increasing gasket thickness toward the bead, wherein another seal is provided and the joint is snugged.

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: A joint assembly for a pressurized, multi-sectional exhaust manifold comprising a joint member, tubular in cross section having a first end and a second end and a throughbore extending therethrough, the outer circumference of the joint member being less than the inner circumference of adjoining exhaust manifold sections, there being formed on the joint member proximate the first end and the second end a plurality of circumferential grooves for receipt of a plurality of sealing rings, the joint member and sealing rings being frictionally secured within adjacent ends of exhaust manifold sections.

Abstract: A connector for interconnecting a pair of adjacent sections of an expandable tubing string includes a plastically expandable sleeve that is arranged co-axially around or inside the ends of the interconnected tubing sections and a series of circumferentially spaced mechanical fasteners, such as screws or rivets, for fastening the sleeve to each of the ends.

Abstract: A tube joint is described which facilitates the connection of tubes having different internal diameters or calibers, simply by exchanging a nut member, an insert bush and a collar member for another nut member, another insert bush and another collar member, respectively, having sizes which are suitable for the tube which is to be connected to the tube joint, and in a state in which the joint body is connected to a fluid pressure apparatus.

Abstract: A system of elements for the formation of pipelines in units for channeling and distributing a gaseous or liquid fluid that is under pressure or under vacuum. The pipelines are created starting from an extruded section pipe with a four-sided cross section having at least one central longitudinal hole and gripping elements along the corners of its walls. A joint which can be inserted tightly into the hole of consecutive section pipes makes possible their connection with the transmission of fluid. A fixing clamp is mounted on the adjacent ends of the consecutive pipes and engages with the gripping elements to mechanically lock the pipes among one another.

Abstract: A tubular element has a sealing ring mounted at an end of the tubular element. The sealing ring has a base clamped against the outer surface of the tubular element. Further, the sealing ring has a sealing lip adapted to seal against an inner surface of an outer tube, in which the tubular element is inserted. The base is disposed in a groove that is formed in the wall of the tubular element. The sealing ring has a further lip that is positioned adjacent to the end of the tubular element and that is bent down and clamped against the base by means of the end portion, thereby providing secure fastening of the sealing ring. The sealing ring is fastened by a method involving bending of the end portion of the tubular element together with the further lip.

Abstract: A pipe coupling comprises a cylindrical pipe, whose smooth end section can be slipped onto a fitting that has at least one sleeve-like area extending in the longitudinal direction At least one sealing ring is arranged between the pipe and the fitting. The fitting and the pipe are securely connected to each other by means of an externally applied pressing tool, which acts in a plastically deforming manner on at least one radial plane on the pipe as well as the fitting section located below it. Between the fitting outer wall and the pipe inner wall is arranged a metal sleeve (31), which can be slipped onto the fitting by force. The fixed axial extension of the metal sleeve (31) encompasses the length of the fitting (1) The length of the metal sleeve is selected so as to correspond to the required overlap between the pipe (2.1, 2.

Abstract: A pipe connection includes a pipe having a smooth-ended end portion pushed onto a sleeve-like region of a fitting. The fitting includes a stop at one end of the sleeve-like region. A seal is arranged between the sleeve-like region of the fitting and the pipe. The pipe and the fitting are formed from a plastically deformable metal. A bead like deformation formed using an externally applied pressing tool axially secured the pipe and the fitting to one another. The deformation encompasses the pipe and the fitting and is located at a small enough distance from a free end of the sleeve-like region of the fitting so that the seal in this location is included in the deformation.

Abstract: A cooling water passage structure for connecting cooling water passages in cylinders forming a V-shape in a water cooled type V-shaped internal combustion engine. A front cooling water passage of a front cylinder communicates with a front cooling water passage of a front cylinder head. A rear cooling water passage of a rear cylinder communicates with a rear cooling water passage of a rear cylinder head. Water pipes and cylindrical portions project from opposed positions of the front and rear cylinders and extend in one straight line. A connecting pipe is formed of rubber and is inserted in the water pipes. Ring clips and are engaged with annular grooves formed on the outer circumference of the connecting pipe at the front ends of the water pipes. O-rings are engaged with the outer circumference of the connecting pipe near the opposite ends thereof. The water pipes are connected to each other in a water tight manner.

Abstract: A tube joint includes a joint body having a through hole to serve as a fluid passage provided along a direction of an axis, a nut member for connecting a tube to the joint body, and an insert bush inserted and fitted to an opening of the joint body and having an insert section to be inserted into the tube and an expanded section protruding from one end of the tube. The expanded section is formed with first projections which make linear contact with an inner wall surface of the opening and which function as seals.

Abstract: Means for securing a polymer liner to the inner surface of a pipe comprises an end piece consisting of a hub portion and a corrosion resistant metallic insert. The polymer hub is fusion welded to the end of the liner, and the metallic insert is seal welded portion of the inner surface of the pipe clad with corrosion resistant material at a distance from the outer end of the pipe. The clad portion may be provided by a pup piece welded to the end of the pipe. This arrangement allows two lengths of lined pipes to be joined by welding with a continuous corrosion resistant internal surface, without damage to the polymer pipe linings and in a manner which allows an assembled pipe string to be spooled onto a reel for subsequent pipelaying operations. In the preferred embodiment, the metal insert is screw-threaded to the polymer hub with an elastomeric seal therebetween, which provides a secondary seal between the end piece and the pipe wall.

Abstract: A corrosion resistant sleeve joining abutted ends of lined pipe where corrosive or erosive gases, fluids or slurries may flow to provide a continuous corrosion barrier between the ends of adjacent pipe liners. The sleeve is preferably a cylindrical member having sufficient length to allow disposition of a protective material, such as biocide, corrosion inhibitor, or combination thereof between the sleeve and the pipe surrounding the sleeve. The elongated cylindrical section may provide a double set of O-rings separated by a distance that would allow an annular recess to be placed between them for disposing a protective material. The protective material is preferably soluble with any fluid material that is to be transported through the pipe and blends with any fluid that permeates the outer most O-ring and comes into contact with the protective material.

Abstract: A metal to metal seal and a method of forming the same includes providing a pair of opposed clamping faces. Each of the clamping faces surround apertures. Seal grooves serve to widen each of the apertures. Each of the seal grooves have truncated angular corners. A malleable metal sealing ring is positioned in the seal grooves. The sealing ring has truncated angular outer edges complementary to the truncated angular corners in the seal grooves. The clamping faces are clamped together in face to face relation to energize the sealing ring. The sealing ring has an enlarged inner diameter to create an deflectable edge at the truncated annular edges. The subsequent application of internal pressure serves to promote deflection of the metal sealing ring at the truncated angular edges and further energize the sealing ring.

Abstract: For threaded connections for oil and gas applications using tubular goods of composite materials, substantially greater make up torque can be applied, with significantly improved tensile and sealing properties, by incorporating stress-relieving conical gradient sections adjacent each end of the threaded section of the composite member. Joining each of two composite tubular members to a single double ended male member having complementary surfaces, circumferential distortion is not concentrated at the end regions of the threaded sections but is distributed, relieving stresses and allowing increased makeup torque to be applied, greatly expanding the useful parameters of fiber reinforced tubular products.

Abstract: A tubular metal shell (10) with mutually overlapping ends serving to line the insides of damaged sewer pipes (22) possesses an intermediate portion (18) located between two end portions (16), the intermediate portion (18) having, as a result of a plurality of axial slots, a lower resistance to distortion than the end portions (16). When such a shell (10) is installed in a sewer pipe with offset connecting sleeves in such a way that the intermediate portion (18) of the shell (10) where the material has been weakened reaches the region of radial offset, the intermediate portion (18) can distort, thus forming a transition between the two radially offset sections of pipe (24, 26). At least the intermediate portion (18) is sealed all round with an elastic sealant or a hose. The repair shell (10) is particularly suitable for repairing sewer pipes with offset connecting sleeves.

Abstract: A pipe coupling for sealing a joint between pipes in a pipeline by compressing annular gasket members against the pipes around the joint, the pipe coupling comprising an annular coupling member having end members and spaced annular protrusions forming gasket channels between the annular protrusions and respective end members for receiving the annular gasket members and a central channel between the gasket channels for accommodating some offset, deflection, or out-of-roundness in the pipes. In one embodiment, the coupling further comprises an outer set of annular protrusions for forming expansion channels outside of the gasket channels. The expansion channels allow retaining rings fixed to the pipe ends to reciprocate within the expansion channels during expansion or contraction of the pipe ends. The protrusions also restrain the degree of expansion or contraction of the pipes and protect the gasket. In another embodiment, an interior pipe coupling with a spreader bolt assembly is provided.

Abstract: An inside sealing sleeve 1 comprised of an expandable steel band for insertion in leaking pipes in need of repair is provided with an arresting arrangement 4 which permits very small detent steps. For this purpose, the internal band end 2 is provided with a slot 5 having two rows of teeth 8, 9, while a tensioning pinion 10, a guide pinion 11 and a locking pinion 12 are rotatably seated on the external band end 3. A tensioning spring 17 engages the pivot axle of the locking pinion 12, it keeps the locking pinion 12 in engagement with the guide pinion 11 and pushes it into the gap 21 between locking pinion 10 and guide pinion 11.

Abstract: A radiator system in which aluminum extruded sections carrying integral fluid conduits are adjustably supported on a wall and interconnected at the corners of a room by connectors. The connectors incorporate slidable seals to engage in a telescopic fashion with the adjacent ends of the conduits. The extruded sections are clipped into wall mountings and are slidably retained, which facilitates assembly at the corners with the telescopic action of the connectors.

Abstract: A coupling joint, arranged to join a first element having a substantially circular internal envelope surface with a second element, inserted into the first element and having a smaller external diameter than the internal diameter of the first element. The coupling joint includes a helically wound, and in longitudinal direction, corrugated or creased strip-shaped intermediate member, which is located in an intermediate position between the first and the second element. An expanding or clamping joint, applied against the first or second element causes same to be pressed against the intermediate member causing same to be compressed or pressed against adjacent envelope surfaces of the elements. The side edge portions of the intermediate member are preferably arranged extending towards one and same element, and engage with the element when the intermediate member is compressed or pressed.

Abstract: An integrally molded compression ring for exerting an outwardly, radially directed force on an inner surface of a gasket to compress the gasket into sealing engagement with a wall of an opening. The compression ring is made from a one-piece body or strip of resiliently flexible material that has a substantially continuous and uninterrupted exterior circumferential surface. Lugs formed on an interior portion of the strip cooperate with a force expansion unit to move the ring into an expanded position. A recess may also be provided in one end of the strip for cooperating with the force expansion unit. Projections integrally molded on an interior portion of the strip and on an exterior portion adjacent an end of the strip engage one another to lock the ring in an expanded position. Guiding structure may be formed on the strip that prevent lateral movement of the ends of the strip relative to one another when the strip is formed into a ring.

Abstract: The invention provides a joint 80 for two steel pipes 50, 52 each containing a liner 54, 56 of polyethylene. The invention also provides an electrofusion fitting for joining the liners 54, 56; a method of making the fitting and a method of making the joint 80. The joint 80 consists of an electrofusion fitting having two frusto-conical outer end surfaces which match similar surfaces on the insides of the end portions of the liners 54, 56. Fusion welded joints are formed at the interfaces between the frusto-conical surfaces. A body of insulating material 66 is received in a central recess in the fitting and protects the fitting from the high temperature of the seam 70 between the steel pipes 50, 52. The frusto-conical surfaces make an angle of 10.degree. or less with the longitudinal axis of the fitting. A support body 14 of metal or of synthetic plastics material contained by the electrofusion fitting ensures that the fitting is adequately supported during electrofusion.

Abstract: An integrally molded compression ring for exerting an outwardly, radially directed force on an inner surface of a gasket to compress the gasket into sealing engagement with a wall of an opening. The compression ring is made from a one-piece body or strip of resiliently flexible material that has a substantially continuous and uninterrupted exterior circumferential surface. Lugs formed on an interior portion of the strip cooperate with a force expansion unit to move the ring into an expanded position. A recess may also be provided in one end of the strip for cooperating with the force expansion unit. Projections integrally molded on an interior portion of the strip and on an exterior portion adjacent an end of the strip engage one another to lock the ring in an expanded position. Guiding structure may be formed on the strip that prevent lateral movement of the ends of the strip relative to one another when the strip is formed into a ring.

Abstract: A connection joining abutted ends of pipe includes a sleeve therein which provides a continuous seal to protect the juncture of the pipe ends and the interior portions of the pipe adjacent the pipe ends from the materials passing through the pipe. The sleeve may be configured from a non-metallic material, such as PTFE, and a plurality of seal rings may be located on the outer circumference thereof to seal the sleeve to the interior surface of the pipe. The non-metallic sleeve is inherently non-corrosive, and therefore no secondary protective coatings need be provided on the interior surfaces of the pipe connection to protect the weld. To position the sleeve in the pipe ends, the sleeve may include a plurality of removable spacer pins thereon which are removed from the sleeve before the weld connection is completed. The sleeve may include circumferential end recesses forming a minor diameter end portion which is receivable in a tubular barrier material where the pipe includes an internal barrier material.

Abstract: A retaining band assembly is provided for use in retaining a seal inside a pipe. The retaining band assembly includes a retaining band having a first end portion and a second end portion. The first end portion of the retaining band has a flat surface and a first edge and the second end portion of the retaining band has a second edge. An expansion block is mounted on the flat surface of the retaining band in spaced-apart relation from the first edge to define a receiving surface on the flat surface. The expansion block includes an upright face extending in a direction generally normal to the flat surface. The second end portion is arranged to engage the receiving surface so that the upright face of the expansion block is positioned to lie in spaced-apart confronting relation to the second edge of the second end portion. A clip engages the second end portion and the first end portion adjacent to the receiving surface. The second edge is disposed between the expansion block and the clip.

Abstract: A weld connection joining abutted ends of pipe includes a heat limiting sleeve therein which provides a continuous seal to protect the weld and the interior portions of the pipe from the materials passing through the pipe. The sleeve may be configured from a non-metallic material, such as PTFE, and a plurality of seal rings may be located on the outer circumference thereof to seal the sleeve to the interior surface of the pipe. The non-metallic sleeve is inherently non-corrosive, and therefore no secondary protective coatings need be provided on the interior surfaces of the pipe connection to protect the weld. To position the sleeve in the pipe ends, and to properly position the pipe ends for welding, the sleeve includes a plurality of removable spacer pins thereon which are removed from the sleeve before the weld connection is completed.

Abstract: In the fabricating of a mandrel bar, a plurality of used mandrel bar segments are provided, each of which has a central bore comprising a smooth surface portion and a threaded portion. Each segment has a circumferential recess at an end thereof and a bevelled surface adjoining the recess and extending inwardly of the segment at an angle to the vertical. A coupling has a smooth central boss section and threaded ends. A connection is made by threadedly connecting the ends of the coupling with a pair of opposed mandrel segments, with the smooth boss of the coupling fitting inside the smooth portion of the bore of each segment to effect, with the threaded joint, a straight, tight joint. A weld groove of gull-shaped cross-section is provided between the opposed ends of a pair of mandrel segments, having a body portion formed by a pair of opposed bevelled surfaces and wings formed by a pair of opposed recesses.

Abstract: An internal coiled tubing connector for connecting a first length of coiled tubing to a second length of coiled tubing includes a cylindrical body having a longitudinal bore therethrough and adapted to be inserted into the first length and the second length of coiled tubing; a by-pass passageway extending from a first opening in a longitudinal outer surface of the cylindrical body to a second opening in the longitudinal outer surface of the cylindrical body; and elastomeric seals mounted to the longitudinal outer surface of the cylindrical body adjacent the first opening and the second opening. When the first opening is placed in communication with a passageway within a wall of the first length of coiled tubing and when the second opening is placed in communication with a passageway within a wall of the second length of coiled tubing a communication by-pass is established across the connection of the first length and the second length of coiled tubing.

Abstract: A conduit swivel connector comprising a unitary central member having a medially oriented abutment flange projecting exteriorly of the central member, and a first sleeve rotatably mounted about the central member about a first tube portion, and a second sleeve rotatably mounted about the central member and about a second tube portion, with the tube portions rotatably secured to the sleeve portions employing respective rings received within cooperating grooves of the tube and sleeve portions permitting a hose to be received upon the first sleeve portion permitting the hose to be rotatably connected by the central member.

Abstract: An apparatus for outwardly radially compressing a gasket into sealing engagement with a wall of an opening includes a continuous strip of resiliently flexible material having first and second ends and first and second members. The first and second members are made from a different material than the strip and are respectively attached to the first and second ends of the strip to thereby form a ring. The first and second members are configured to include locking structure that both fixes the ring in an expanded position adjacent to the gasket and secures against contraction of the ring by the gasket. The apparatus may be made from a plurality of continuous strips of resiliently flexible material and have structure for aligning and securing the first end of each one of the strips adjacent the second end of another of the strips to form a closed ring. The aligning and securing structure includes at least one set of the first and second members.

Abstract: A pipe joint capable of transmitting high axial compressive loads includes a reduced wall thickness section at the ends of the pipe to be joined and a coupling sleeve supported in telescoping relation with the reduced wall thickness section. Shoulders formed at the ends of the reduced sections bear against the ends of the sleeve, and the ends of the reduced thickness sections bear against each other so that a portion of the axial compressive load is transmitted through the coupling sleeve and a portion through the reduced thickness sections and a substantially uniform unit stress is maintained. O-rings carried by the coupling sleeve provide a fluid-tight seal between the sleeve and the adjacent surface of the reduced thickness section of the pipe.

Abstract: A flange joint assembly having first and second attachment flanges are associated with first and second tubes through an interengagement of the ends of the tubes between an inner annulus and an annular corrugation which are inwardly of an attachment plate. The annulus and corrugation with the interengaged tube end are flared outwardly to interlock the components. The tube also includes an outwardly tapered section adjacent to the end. A tubular insert having inwardly tapered outer surfaces extending to each end from a midsection is positioned within the tapered portions of two axially abutting tubes. Fasteners draw the attachment flanges together to complete the assembly.

Abstract: A threaded tubular connection is depicted (120) for connecting joints of reinforced thermosetting resin pipe. Box threads are formed in both ends the joints as at (107) for connection by means of a coupling (102) formed with pin threads (104) on both ends. The coupling is formed of a material having a more reliable compressive strength than the pipe material, to prevent cracking and shattering of the pipe material upon make-up. A process for forming threads with the pipe joints is disclosed.

Abstract: Cylinder-to-cylinder attachment method and construction featuring nonutiltion of mechanical fasteners or bonding, especially advantageous for attachment of cylinders which are composite or to be subjected to hydrostatic pressure. A fastening ring is interpositionally and rotatively engaged and aligned with a toothed axial end of each cylinder whereby the inwardly radial teeth for each cylinder appropriately mesh with the outer grooved circumferential surface of the fastening ring. The resultant joint is easily detachable and less susceptible than conventional joints to damage, breakage, degradation, stress concentrations and fluid infiltration.

Abstract: A coupled pipe assembly having a pair of opposed, axially-positioned pipes each having opposed beveled ends and interior corrosion-resistant linings. A sleeve having heat-deflecting material is provided axially within the pipes with the heat-deflecting material being positioned adjacent the opposed pipe ends to protect the corrosion-resistant linings from heat damage during welding of the pipe ends. The sleeve has a tapered cross-section extending to and forming a rounded end edge portion.

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

Abstract: A method and apparatus for coupling pipe, and installing coupled pipe in a trenchless installation, the pipe being adapted for use as a watermain or the like. Lengths of watermain pipe are provided with a bell at each end, and connecting nipples adapted to be received within opposing bells, to effect a fluid-tight seal. As lengths of watermain are urged into a trenchless tunnel, opposing bell-end faces withstand the force being exerted on the pipe sections, so that damage is avoided and a sealed underground pipe installation is economically and quickly effected.

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

Abstract: A ratchet-type spoolable connector for coupling coiled tubing to tools or other coiled tubing. A mandrel is engaged by a ratchet to the inside of a body and slips abut the end of the body and engage the mandrel. The alternate application of tension and compression across the connector ratchets the mandrel into wedging engagement with the slips for gripping the coiled tubing.

Abstract: Cylinder-to-cylinder attachment method and construction featuring nonutilization of mechanical fasteners or bonding, especially advantageous for attachment of cylinders which are composite or to be subjected to hydrostatic pressure. A fastening ring is interpositionally and rotatively engaged and aligned with a toothed axial end of each cylinder whereby the inwardly radial teeth for each cylinder appropriately mesh with the outer grooved circumferential surface of the fastening ring. The resultant joint is easily detachable and less susceptible than conventional joints to damage, breakage, degradation, stress concentrations and fluid infiltration.

Abstract: A connector is provided for coupling a tubular member to a selected apparatus. The tubular member has inner and outer surfaces, and terminates at an end, with the inner surface at least in-part defining a central bore. A central body is provided with first and second ends. A linkage member is disposed at the first end of the central body for connecting the central body to a selected apparatus. A tubing coupler is disposed at the second end of the central body, and is operable in an insertion mode of operation in a radially-reduced position for insertion into the central bore of the tubular member, and a coupling mode of operation in a radially-expanded position for grippingly and sealingly engaging the inner surface of the tubular member.

Abstract: An internal slip-type connector for coupling coiled tubing to tools or other coiled tubing having a body that does not upset the outside diameter of the coiled tubing with seal means to seal to the inside of the coiled tubing. A mandrel is threadably engaged to the inside of the end of the body and slip means abuts the first end of the body and engages the mandrel. Rotation of the body relative to the mandrel wedges the slip means into the inside of the coiled tubing for gripping.

Abstract: A coupling ring for circular ducts is formed of a single piece of sheet metal and has oppositely extending flanges connected together by an annular channel-shaped rib which cooperatively with the flanges defines oppositely opening grooves containing sealant. The relative dimensions of the grooves is such that a hydraulic lock is avoided at the time the coupling ring is telescoped onto the ducts. Proper sealing can be visually determined by inspection.

Abstract: This invention is directed to the combination of a pair of aligned tubular members joined in end-to-end relationship by an internal expansion coupling device, where such coupling device offers thrust restraint to the combination. Each of the tubular members is characterized by the end thereof having one or more circumferentially disposed recesses about its wall. The coupling device, which cooperates with said recesses comprises an elongated open ended tubular joint member formed from at least one relatively rigid, rectangular sheet-like member, where said member is defined by a pair of opposing sheet ends with a pair of opposing sheet sides. The sheet ends thereof overlap such that the end portions lie contiguous with each other.

Abstract: A mechanical joint connector and a joint made with the mechanical joint connector are provided for use in connecting the bell ends of fittings and the like, the bell ends being of a mechanical joint-type configuration having an annular gasket-receiving recess extending into the bell from the outer flange surface of the bolt-through flange of the bell, the connector including a cylindrical sleeve and a radially extending flange, with the flange having an annular raised portion extending upwardly from upper and lower surfaces of the flange. The annular raised portions of the flange have upper surfaces which are tapered inwardly from an outer diameter toward the sleeve, such that the raised portion has its maximum height at its outer diameter.