Abstract: A coupling body having an opening and configured to receive a pipe in the opening. The coupling body is made of a metal material and the pipe is made of a different metal material to the metal material of the coupling body. An insulating sleeve lines at least a portion of an inner periphery of the coupling body adjacent the opening. The insulating sleeve is made of non-metallic material and is configured to serve as a physical non-metallic barrier between the metal material of the coupling and the different metal material of the pipe so the different metal material of the pipe does not contact the metallic material of the coupling body.

Abstract: A dielectric fitting includes a nut having inner threads and an axial compression surface, and a hole having a first diameter. A mating component includes outer threads that engage with the inner threads including a second axial compression surface. A first fitting includes a circumferential flange captured between the first axial compression surface and the second axial compression surface, the first fitting having a first wall that extends axially and passes through the first hole and includes first fitting threads. A second fitting includes second fitting threads that engage with the first fitting threads, the second fitting having a second wall and a bulge portion that radially projects to a second diameter and includes an O-ring. The nut and the mating component are dielectrically isolated from the first fitting and the second fitting, and the second diameter is larger than the first diameter.

Abstract: Disclosed is a connecting device for piping for connecting a pipe to another pipe or to another part for piping. The connecting device includes an adapter and a pipe nipple configured to be threadedly engaged with the adapter. The pipe nipple is fixed to an end of a pipe, and an end of another pipe is inserted into the adapter. The adapter includes a hollow adapter body, a cap coupled to the adapter body, a grip ring configured to fix the pipe introduced into the adapter body, a body-sealing member configured to provide a seal between the adapter body and the pipe, a sleeve disposed between the grip ring and the body-sealing member, and a metal sealing member configured to provide a seal between the adapter body and the pipe nipple.

Abstract: A gap sub uses a plurality of insulating members in conjunction with at least two metallic members to effect a mechanically and electrically robust configuration. The gap sub includes an upper end portion, a lower end portion, an outer sleeve, an inner sleeve, an insulating outer washer, an insulating inner washer, and an insulating spider. The insulating outer washer is configured to transfer a first axial load between the upper end portion and the outer sleeve. The insulating inner washer is configured to transfer a second axial load between the inner sleeve and the lower end portion. The insulating spider is configured to transfer a torsional load between outer sleeve and the inner sleeve.

Abstract: An isolating flow line spool fitting, particularly for electrical isolation of above-ground steel flow lines or other pipes. Two opposing half segments are electrically separated from each other by non-conductive isolating materials. A first half segment includes a threaded male connection member, while a second half segment includes a mating threaded collar for threadedly connecting the second half segment to the first half segment, and thereby forming a fluid pressure seal.

Abstract: A thermal insulation device of a screwed junction between two sections of pipe constituted by an outer pipe surrounding an inner pipe between which thermal insulation material is positioned, the inner pipes of each section being assembled together by said screwed junction, one section delimiting a male portion and the other section delimiting a female portion, the two portions being fitted into one another in order to delimit said screwed junction, wherein the male portion is constituted by the inner pipe and a tubular part connected to the inner pipe, the diameter of said tubular part being less than that of the outer pipe, said male portion incorporates an insulating material, and wherein the female portion is constituted by a part of the outer pipe and an intermediate tubular part connecting the inner pipe to the outer pipe, the inner diameter of said intermediate part being greater that the outer diameter of the tubular part of the male portion, a thermally insulating material being inserted between the p

Abstract: The conduit assembly includes two mateable generally cylindrical conduit connector bodies with a longitudinal internal bore extending therethrough. The connector bodies include a locking surface for joining and retaining the bodies together at a desired angle. One connector body is externally threaded and the other provides an external snap-on attachment mechanism. Moreover, a gland nut is provided with an internally threaded surface and a snap-on attachment mechanism. The gland nut is slidably positioned over and attached to the connector bodies via snap-on attachment or screw attachment. The gland nut secures and retains the connector halves together at the desired position.

Abstract: Flexible couplings are provided comprising a male member disposed within a female member in a spaced apart configuration, with the space being filled, at least partially, with an elastically deformable material. The male and female members comprise features that prevent separation from one another after the elastically deformable material is provided in the space between them. For example, the male and female members of one embodiment each comprise a threaded region, with the respective male and female threads being intermeshed but generally spaced apart from each other. At least one of the male and female threads is tapered in two opposing directions with respect to a coupling centerline. The double taper requires the elastically deformable material to be displaced for the male and female members to become separated. However, the elastically deformable materials are constrained by surfaces of the male and female members, and therefore, cannot be displaced.

Abstract: A junction for a flexible tube for high pressure fluids which comprises a sleeve pressed down onto the flexible tube, for coupling with a connection element of the flexible tube, where a female rotating threaded connection element is connected to the connection element. A threaded end element can be associated with the connection element of the flexible tube, wherein the hydraulic seal between the end element and the connection element is guaranteed through the coupling of truncated cone surfaces, provided at least on the end element, with an engagement element that can be connected to the connection element, wherein the truncated cone surfaces and the engagement element are tightened the one to the other using a suitable tightening torque.

Abstract: A universal pipe joint for attaching two round pipes together accommodating misalignment using a female adapter fitting (30) engaging a male adapter fitting (44), each having a radial interior and exterior diameter (38) and (50) with a compression nut (52) urging them together. The female fitting has external threads (40) with a number of locking grooves (42) at right angles to the threads, and a compression nut with a spring-loaded ball (54) therein that clicks into the grooves while the nut is being tightened. When the nut is fully tightened, the radial diameters are compressed and the ball (62) is locked into the groove with a set screw (66). Thus securing the connection and eliminating loosening by over the road operation of a vehicle to which the device is attached. A second embodiment replaces the compression nut with a pair of flanges (68) held together by nuts and bolts.

Abstract: An electrically insulating gap subassembly for inclusion in a pipe string (30) comprising a pair of tubular members (90, 98) having an electrically insulating isolation subassembly (94) threadably disposed therebetween is disclosed. The electrically insulating isolation subassembly (94) has an anodized aluminum surface that provides electrical isolation to interrupt electrical contact between the two tubular members (90, 98) such that electromagnetic waves (46, 54) carrying information may be generated thereacross.

Abstract: A fluid conducting connector for use in water connections particularly water heater connectors. The connector assembly is designed for mating connection to a galvanized nipple for reduction of galvanic corrosion between dissimilar metal connections. An insulator assembly is seated within the connector to maintain separation between the galvanized nipple and the copper tube of the assembly. The connector assembly includes an internally threaded female connector mounted to the copper tube for connection to the nipple. The insulator assembly includes a tubular sleeve and a sealing washer. The sleeve extends partially into the copper tube while the washer seats within the female connector to seal the connector.

Abstract: A system and method for electrically isolating conduit connections in a gas line system for residential, commercial or industrial applications. Gas line conduit of standard configuration is cut to length and upset at one end to create an annular flange of increased diameter, which then is machined to a desired configuration having annular ridges and flat and tapered surfaces. The other end of the conduit is machined in a standard thread configuration. The flanged portion of the conduit is then placed in an injection molding machine and receives a non-conductive elastomeric, molded seal thereover which includes a tubular pilot portion. A coupling nut slipped over the conduit may then join the conduit to conventional gas line valves, meters or the like in a completely electrically insulated connection.

Abstract: A corrosion resistant tubular system is formed of a length of pipe in which each of the opposed ends terminate in a reduced external diameter integral tubular lip portion and, spaced from the lip portion, increased diameter external threads compared to the tubular lip portion, the lip portion having an external circumferential frusto-conical surface and a tubular coupling having internal threads adjacent each of the ends thereof and having, spaced inwardly from each of the internal threads a reduced internal diameter circumferential sealing surface that is tapered in a frusto-conical shape, the interior of the tubing and the coupling being formed of corrosion resistant metal alloy. When assembled a telescopic mating relationship is established between the external conical surface of the pipe and the internal conical surface of the coupling.

Abstract: A system and method for electrically separating meters and pipes which carry combustible gases. The system includes at least one coupling (10). The coupling connects an electrically conductive conduit (12) to a gas meter (82) or other device. The coupling includes an electrically insulating layer (52) including a flange (61). A ring nut (74) engages a threaded portion (72) of a connecter to hold a resilient seal (14) in compressed relation between the flange and connector to provide a fluid tight connection. The coupling enables the flow of gas therethrough while electrically separating the conduit from the threaded connector. The system is easy to use, reliable, inexpensive and can be designed to be integral with a metal gas conducting conduit. Furthermore, the present invention provides improved performance, safety and long life due to the use of non-conductive material which impedes the flow of electricity along a gas line.

Abstract: An electrically-insulated pipe coupling includes a first tubular metal body, a second tubular metal body which has a cylindrical section and which has molded onto it an electrically-insulating covering extending over the end of the body and a portion of the cylindrical section, a coupling member for securing the two metal bodies together at their respective ends and which is disposed over the juncture of the two metal bodies in such a manner that a portion of the electrically-insulating covering molded onto the second tubular body extends beyond the coupling member, and an electrically-insulating barrier extending outwardly from the cylindrical section of the second tubular body and disposed about the portion of the electrically insulating covering extending beyond the coupling member.

Abstract: A tube coupling is disclosed which electrically insulates the tube from the coupling. A metallic nut and body interact with a non-metallic coupling to constrict the non-metallic coupling about the tube end providing multiple seals and seats while avoiding metal-to-metal contact between the tube and either the nut or body. Multiple cooperating cam surfaces are provided on the body and non-metallic coupling to achieve a tube coupling stronger than, yet electrically insulated from, the tube.

Abstract: An electrically insulated tube union includes a pair of tube fitting assemblies and an electrically non-conductive connector. Each tube fitting assembly has a fitting body, a fitting nut and a threaded ferrule. The connector has a body with an external radial flange between the ends thereof. The connector body is externally threaded on either side of the flange and the threads are axially spaced from the connector ends. The ferrules threadably engage the connector threads and are captured between their respective fitting nut and body. Each ferrule has a tapered end with an unthreaded portion that seats in a frusto-conical portion of the fitting body so that when the fitting nut and body are threadably engaged the ferrule unthreaded end grips the unthreaded connector ends to provide a fluidtight and electrically insulated coupling between the pair of tube fitting assemblies.

Abstract: An electrically insulating pipe coupling assembly for electrically isolating pipe sections to which an electric current is applied. The apparatus includes first and second extension members formed having an integral flange with a protruding annular sealing bead at one end and adapted for attachment to a section of pipe at the other end. An insulating sleeve having an insulating flange is mounted on the first extension member. A nonconductive spacer is positioned between the opposing integral flanges to receive the annular sealing beads, separating and electrically isolating the first and second extension members. A first coupling member is slidably mounted on the insulating sleeve, while a second coupling member is slidably mounted on the second extension member. The coupling members, when secured together, force the annular sealing beads into compressive contact with the nonconductive spacer.

Abstract: An improved connector has a flexible braided metal hose assembly with a compression fitting or pipe fitting at one end and a special composite fitting assembly with an electrically insulating insert in a metal male outer fitting at the other end for connection to the water line of an appliance, such as a hot water heater.

Abstract: The joint comprises a first end portion to be coupled and shaped like a sort of cup, in which a second portion, shaped like a flange, and to be joined to the first one, is insertable, wherein the second portion is internally occupied for a section by a precision seating recess, for a cylindrical element of highly insulating material, and flush to the inner wall of the conduit. The end of the cylindrical element, facing towards the bottom of the cup, has a radially directed annular projection for the constant separation of the flange from the bottom of the cup, the projection axially and sealingly engaging with an annular gasket, and being provided with a collar for the blocking therein.

Abstract: A metal connector for the end of an internally and externally plastics coated metal tube maintains the metal of the tube, for example aluminium, out of contact with the metal of the connector, for example brass, and thereby avoids problems of anodic corrosion. This is achieved by forming the male portion of the connector with a tapered shank over which the tube end is forced for connection, and a shoulder to act as a stop for the tube end, the shoulder being of such relatively shallow radial depth that it abuts the internal plastics coating but not the metal of the tube. In another aspect of the invention, a second shoulder radially outward of the inner shoulder abuts the outer plastics coating and the two shoulders are radially separated by a radial groove that thereby prevents contact between the end of the metal tube and the metal connector.

Abstract: A dielectric tube coupling includes a tube-like body having a circumferential ramp on the exterior periphery thereof. Opposed, non-conductive flared sleeves are disposed in surrounding relationship with the body so that the flared portions thereof closely engage opposite faces of the ramp. A threaded connector surrounds one of the sleeves and has an angled internal portion thereof in exteriorly abutting relation with the flared portion of the sleeve. The connector threadedly receives a coupling which includes an internal angled shoulder disposed in exteriorly engaging relation with the flared portion of the other sleeve. The tube-like body has one end sealingly disposed by means of an O-ring and a back-up washer in a seat included in the connector.

Abstract: A pipe joint includes a joint body having an internal thread portion formed in the interior thereof, a bush having formed on the outer periphery thereof an external thread portion helically meshed with the internal thread portion of the joint body, a gasket accommodated within the interior of the joint body, and a retainer having formed on one end thereof on the side of the joint body a flange of increased wall thickness which is pushed toward the joint body by the end face of the external thread portion of the bush. The flange of the retainer may be provided with at least one engaging projection extending radially outwardly from the outer periphery thereof and, in this case, the internal thread portion of the joint body is provided therein with at least one lock portion which is engaged with the at least one engaging projection of the flange.

Abstract: An improved insulating union is provided of the type designed to prevent electrolytic corrosion in flow lines. The tail sub is physically separated from both the threaded sub and nut by a plastic layer. An annular groove is conventionally provided in the threaded sub for an O-ring to seal between the plastic layer and the threaded sub. Another O-ring groove is provided in a tail sub for sealing between the tail sub and the plastic layer to prevent leakage of high pressure gas from the union. The O-ring is inserted in the tail sub groove, and the plastic insulating layer is thereafter molded over the end of the tail sub.

Abstract: A separable electrical isolator for coupling two pieces of conductive tubing carrying high pressure cryogenic gas includes a gas-impervious dielectric spacer with a bore in which the pieces of tubing are sealed axially-aligned in fluid communication with an electrically-nonconductive gap between them. A pair of complementary coupling members are rigidly attached to the pieces of tubing to define outwardly-extending annular flanges that are each sealed about the periphery of a corresponding one of the pieces in a position slightly set back from an end of the piece. Each flange has an annular rib protruding from it toward the end of the piece. The coupling members are separably and nonconductively interconnected with the annular ribs applying compressive force to the spacer to thereby effect the seal.

Abstract: A separable electrical isolator for coupling two pieces of conductive tubing carrying high pressure cryogenic gas includes a gas-impervious dielectric spacer with a pair of opposing surfaces and a bore extending therebetween in which the pieces of tubing are sealed axially-aligned in fluid communication with an electrically-nonconductive gap between them. A pair of complementary coupling members are rigidly attached to the pieces of tubing to define outwardly-extending annular surfaces that are each sealed about the periphery of a corresponding piece in a position slightly set back from and facing an end of the piece. The coupling members are separably and nonconductively interconnected with the annular surfaces facing the spacer surfaces and O-ring seals in between to apply compressive force to the spacer and seals and thereby effect the seal.

Abstract: An insulative coupling for coupling a first tube to a second tube for fluid flow therebetween. The coupling includes an insulative washer and an insulative bushing cooperating with a flange connector associated with one of the coupling body elements to provide an electrically insulative connection between the coupled tubes. An O-ring is utilized in conjunction with a face seal radially inwardly of the washer to provide a high pressure seal between the coupling elements. The washer and bushing include axially extending flange portions having snug fits with associated components of the coupling to provide for facilitated and accurate assembly.

Abstract: An insulated pipe joint and a method for producing the joint in which first and second tubular portions are joined through an insulating member disposed in a gap between the first and second tubular members. The first tubular member has a flange portion at one end thereof while the second tubular member has a cap portion which accommodates the flange portion of the first tubular member with the gap being formed between the cap and flange portions. The insulating member disposed in the gap hermetically couples the first and second tubular members while electrically insulating them from one another.

Abstract: This invention relates to the art of pipe couplings and more particularly to a coupling that includes a first fitting to which one pipe is connected, a second fitting to which a second pipe is connected, a connector sleeve which releasably joins such fittings and a resilient member interposed between said fittings to substantially eliminate the transmittal of mechanical vibration from one of the pipes to the other pipe.