Abstract: A test sample card is provided with a locking feature for achieving a positive, locking engagement with a transfer tube that conducts fluid into the interior of the test sample card. The locking feature consists of a tubular channel inwardly disposed from the fluid intake port that has an inner annular rim defining a restriction. The annular rim is of a reduced diameter relative to the diameter of the transfer tube. A recessed region is positioned inwardly from the restriction that has an opening in one of the surfaces of the card body. When the transfer tube is inserted into the tubular channel, the first end is forced past the restriction into the recessed region, with the annular rim compressing the transfer tube. The user is able to sense with their hands when the first end is inserted past the restriction. Visual observation of the first end of the transfer tube through the opening in the card surface confirms that the transfer tube has been properly inserted into the test sample card.

Abstract: This invention is a method and device for protecting steel gas lines and the like from environments which it may have to pass through, such as masonry and brick walls where the corrosive effects of chemicals in the cement could be disastrous. The device is composed of a an adjustable length of threaded PVC piping, a vinyl compression ring and a plastic sealing nut on each end for securing the vinyl compression ring and PVC piping around the steel piping.

Abstract: A fluid coupling assembly includes a first connection member, a second connection member, and a flow sealing member. The first connection member has an exterior surface, an interior surface and a threaded through hole from the exterior surface to the interior surface. The second connection member has a first sealing surface facing the interior surface of the first connection member, and a first flow passage. The first sealing surface is rigidly fixed with respect to the first connection member. The flow sealing member has external threads that mate with the threaded through hole, a second flow passage aligned with the first flow passage of the first member, and a second sealing surface that seals with the first sealing surface around the first and second flow passages upon application of sealing force via rotation of the external threads in the threaded hole.

Abstract: A fitting provides a means of making a union between a tube and a female fitting with low dead volume and without the use of tools. The fitting is comprised of a tube member that is pressed into the female fitting to automatically remove dead volume. The tube member is pressed into the fitting by a spring with the appropriate tension to hold the tube member against the expected pressure. The fitting also is comprised of a two piece nut assembly. The forward nut compresses a ferrule to create the high-pressure seal. The rearward nut is attached to the forward nut and provides compression and a holding means for the spring.

Abstract: High localized loading, galling, and high torque forces have been generally eliminated or greatly reduced in a two ferrule tube fitting assembly through suitable modification of the rear ferrule so as to redirect the reaction forces acting between the front ferrule and the drive nut. The rear ferrule has a cylindrical interior wall that closely surrounds the tube end and is provided on the interior cylindrical wall with a circumferentially continuous radial recess that is located between the nose and rear wall of the rear ferrule. The rear ferrule also has a radially external wall that is substantially conical and additionally shaped to extend radially outward toward the enlarged diameter portion or flange of the rear ferrule. The rear ferrule further includes a contoured face on the rear driven surface of the ferrule that engages the drive surface of the drive nut.

Abstract: Fluid connector for connecting a first fluid-bearing conduit in a capillary tube to a second fluid-bearing conduit in a receiver. An internal fitting assembly includes an internal fitting body, a body cavity for receiving a ferrule and a self-compensating nut, the ferrule and self-compensating nut being locatable on the capillary tube, and an internal ferrule seat located on a portion of the body cavity, against which a tapered portion of the ferrule is applied to so as to obtain a first fluid-tight seal between the capillary tube, the ferrule, and the ferrule seat.

Abstract: A method and apparatus for connecting a tube to a surface that creates a dead volume seal. The apparatus is composed of three components, a body, a ferrule, and a threaded fitting. The ferrule is compressed onto a tube and a seal is formed between the tube and a device retained in the body by threading the fitting into the body which provides pressure that seals the face of the ferrule to a mating surface on the device. This seal can be used at elevated temperatures depending on the materials used. While the invention has been developed for use with micro-machined silicon wafers used in Capillary Gas Chromatograph (GC), it can be utilized anywhere for making a gas or fluid face seal to the surface of a device that has near zero dead volume.

Abstract: A pipe coupling for joining separate segments of pipe together in a fluid tight manner. A connector is fixedly secured to one pipe section with a retaining nut being removably mounted on the remaining pipe section. A retaining nut is threadably secured to a spool section with this spool section being threadably secured to the connector. In between the retaining nut and the pipe section there is located a grab ring. This grab ring includes a plurality of biting members. The grab ring can either constitute a split ring or can comprise an annular base ring which is fixed in size which has a plurality of deflectable settings mounted thereon.

Abstract: Reject waste water adapter coupling fitting, system and installation method for use with a household undercounter reverse osmosis (R/O) water filtration installation associated with an in-counter sink having a garbage disposer with its outlet connected by standard slip fit plumbing fittings to a sink drain trap plumbed to the household sewer system. The R/O reject waste water undercounter drain line is coupled into the sink drain trap in parallel drainage relation with the disposer outlet plumbing fittings by a baffle Tee plumbing fitting having first and second inlets perpendicular to one another with their input drainage liquid flow separated by an internal baffle. The garbage disposer outlet is coupled by a standard slip fit single inlet/outlet conduit plumbing fitting to the baffle Tee first inlet. The baffle Tee has a single outlet slip coupled to the inlet of the trap.

Abstract: A collet-type pipe coupling of simplified construction includes three main flange parts and a grip structure. The main flange parts are machined or otherwise formed with plain shapes. One flange is welded to an associated length of pipe or other body and all of the flanges are assembled over a separate length of pipe. A first set of bolts is tightened to compress a packing carried in the welded flange with an intermediate flange. A second set of bolts draws a flange collar towards the intermediate flange to constrict the grip structure radially into locking engagement with the separate length of pipe to complete a coupling installation.

Abstract: High localized loading, galling, and high torque forces have been generally eliminated or greatly reduced in a two ferrule tube fitting assembly through suitable modification of the rear ferrule so as to redirect the reaction forces acting between the front ferrule and the drive nut. The rear ferrule has a cylindrical interior wall that closely surrounds the tube end and is provided on the interior cylindrical wall with a circumferentially continuous radial recess that is located between the nose and rear wall of the rear ferrule. The rear ferrule also has a radially external wall that is substantially conical and additionally shaped to extend radially outward toward the enlarged diameter portion or flange of the rear ferrule.

Abstract: A pipe coupling comprises a body part having a hollow interior and a rotatable sleeve captively mounted to the body part of the coupling such that the end of a length of pipe connected to the coupling passes through the rotatable sleeve to the hollow interior of the coupling. The rotatable sleeve has a tapered interior of narrowing diameter towards the pipe entry end of the rotatable sleeve. A circular band is coaxially positioned inside the rotatable sleeve. In use a pipe end is pushed into the threaded sleeve to the hollow interior of the coupling, and through the circular band. Force on the pipe away from the coupling further closes the circular band about the pipe end. Preferably the circular band has a threaded interior.

Abstract: A pipe connection is formed between a relatively soft pipe segment and a stiffer socket by inserting a split securing ring in a groove of the socket, then spreading this ring and inserting the pipe segment through the split ring into the pipe segment without contact with the split ring. The mounting body maintaining the spread state of the split ring is then removed to allow the spring ring to engage with its intrinsic elastic force along the periphery of the pipe segment. Even if the inner surface of the split ring is provided with a corundum layer or like friction-enhancing structure there will be no damage to the outer periphery of the pipe which might interfere with sealing.

Abstract: A coupling assembly for joining two spaced coaxial pipe ends comprises an elongate sleeve adapted to receive coaxially two opposing pipe ends to be connected. The sleeve has frusto-conical ends opening outwardly and receiving a pair of annular elastomeric gaskets adapted to fit into the frusto-conical ends of the sleeve in sliding engagement around the pipe ends to be connected. A separate retaining ring member is located axially outward of each end of the sleeve to encircle the pipe ends to be connected. Each retaining ring member has a frustoconical inner wall facing the sleeve to define a gripping ring chamber. Positioned in each gripping ring chamber is a separate radially compressible gripping ring member. Separate engagement ring members are located at each end of the sleeve at a location between the elastomeric gasket and the gripping ring at that respective end.

Abstract: The new-type conduit fitting has at least a first, a second and a third part, through each part passes a hole which allows the parts to be pushed axially over the cable. The first part can be connected to a housing in an electrically conductive manner and can be axially tensioned with the third part. The second part is electrically conductive, and it reduces the cross section of its hole with increasing axial tensioning between the first and third parts. The hole of the first part expands conically against the second part, wherein the second part is a annular sleeve with a sheathing surface conically tapering against the first part and with a cylindrical inner surface, and the development of the annular sleeve has a shape meandering in a zigzag pattern. A fourth part formed as a rubber sleeve is positioned around the cable, and a fifth part formed as a union nut compresses the rubber sleeve between the union nut and the third part.

Abstract: A connectorized capillary and in-line flow cell system which greatly expedites the construction of capillary zone electrophoresis (CZE) and other separation instrumentation. A capillary is mounted within a cavity formed in a body, and a mechanical fastener is positioned about the body. The inner diameter of the fastener is less than the outer diameter of the body, so that the connector may be firmly coupled to any system component having a corresponding portion adapted to accept the fastener. The connectorized capillaries thus permit permanent or semi-permanent attachment to various in-line flow cell devices such as detectors, valves, buffer reservoirs and the like. For example, an in-line conductivity detector is assembled by connecting a conductivity meter to the opposing ends of the flow cell body. Annular sensing surfaces can also be provided within the cell.

Abstract: A cryogenic fluid conveying device has removable connection of a metal tube and a receptor for the tube. The receptor is formed of a housing member with an aperture therein for conveying the fluid. A tubular member of resilient PTFE has a bore size so as to be slidingly receptive of the rigid tube. A ferrule is disposed on the tubular member which is positioned in the housing member. An annular nut is threaded onto an end of the housing to constrict the ferrule and thereby constrict an annular section of the tubular member. This constriction provides a sealingly tight fit for the rigid tube such that the metal tube can be inserted into and removed from the tubular member.

Abstract: A double wall compression fitting is dimensioned for attachment to a double wall pipeline system having an inner pipeline and an outer pipeline. The pipelines have a multiplicity of longitudinally running support fins running between them to maintain a spaced relationship. The fitting is comprised of an inner housing having at least two terminals, an outer housing encasing the inner housing in a manner to form an annular space therebetween and a compression connecting assembly. The compression connection assembly connects the inner and outer housings to the double wall pipeline system so that the annular space between the housings is in communication with an annular space between the pipelines of the double wall pipeline system. The compression connecting assembly includes a coupler with means to compress it to form a compression seal with the outer pipeline.

Abstract: A cord grip in which two screw fittings provide a variable volume chamber for compressing a flexible soft durometer grommet held within a flexible annular cord gripping member. The cord gripping member is of a harder durometer than the grommet and has a plurality of fingers for gripping the cord. The combination of the hard durometer cord gripping member and the soft durometer grommet provides positive gripping action and a liquid tight seal on the cord when the variable volume chamber within the fittings is in the compressed state.

Abstract: A connectorized capillary and in-line flow cell system which greatly expedites the construction of capillary zone electrophoresis (CZE) and other separation instrumentation. A capillary is mounted within a cavity formed in a body, and a mechanical fastener is positioned about the body. The inner diameter of the fastener is less than the outer diameter of the body, so that the connector may be firmly coupled to any system component having a corresponding portion adapted to accept the fastener. The connectorized capillaries thus permit permanent or semi-permanent attachment to various in-line flow cell devices such as detectors, valves, buffer reservoirs and the like. For example, an in-line conductivity detector is assembled by connecting a conductivity meter to the opposing ends of the flow cell body. Annular sensing surfaces can also be provided within the cell.

Abstract: A pipe coupling for joining separate segments of pipe together in a fluid tight manner. A connector is fixedly secured to one pipe section with the retaining nut being movably mounted on the other pipe section. The retaining nut is to be threadably secured to the connector. In between the connector and the pipe section is located a sealing arrangement which includes a thin walled grip ring. This grip ring includes a plurality of biting members. When the retaining nut is tightened on the connector, these biting members imbed into the wall surface of the pipe section thereby longitudinally fixing the position of this pipe section relative to the connector and maintaining a fluid tight established relationship.

Abstract: A double wall compression fitting is dimensioned for attachment to a double wall pipeline system having an inner pipeline and an outer pipeline. The pipelines have longitudinally running support fins running between them to maintain a spaced relationship. The fitting is comprised of an inner housing having at least two terminals, an outer housing encasing the inner housing in a manner to form an annular space therebetween and a compression connecting assembly. The compression connection assembly connects the inner and outer housings to the double wall pipeline system so that the annular space between the housings is in communication with an annular space between the pipelines of the double wall pipeline system. The compression connecting assembly includes a coupler with means to compress it to form a compression seal with the outer pipeline and a spacer. The spacer has a set of indents to accommodate the support fins of the double wall pipeline system and means of communication therethrough.

Abstract: A friction sealed coupling assembly (10) for connecting sections of pipe (P1, P2) having a connecting sleeve (12) and a pair of opposed draw sleeves (14, 16). The connecting sleeve is formed of a hollow cylinder (24) having a uniform inner diameter (D2) and an outer diameter that decreases from a midpoint (M) toward each open end (26, 28) resulting in diverging external tapers (T1, T2). One of the draw sleeves is placed over each taper of the connecting sleeve, each draw sleeve having a uniform outer diameter and an inner diameter that decreases from the first end to the second end creating an inner taper. The inner wall of each draw sleeve is oppositely tapered to the corresponding connecting sleeve end. Each draw sleeve has a bolting flange formed at one end. Ends of the sections of pipe to be connected are first inserted in each end of the connecting sleeve. The opposed draw sleeves are drawn together by tightening connecting bolts (22) so the sleeves move toward each other.

Abstract: A liquid tight connector for pass through cable, tubing or rods includes a body, a compression nut and a gland. There are fingers on the body with flats and triangular ends which cradle the gland and grasp cable, tubing or rods in a liquid tight manner tightly enough to provide strain relief. Spherical bumps with pawl like flats hold the compression nut free of the likelihood of loosening once engaged. The triangular configuration of the ends of the fingers enables improved strain relief and adapts to a large selection of cable, tubing or rod diameters.

Abstract: A resin-made detachable fitting to which a tube is connected. The fitting comprises a core of a cylindrical or ring shape forcibly inserted into the tube end to expand it, a fitting body having an inner passage, and a box nut able to mesh with ends of the fitting body and connecting the tube end to the fitting body. The fitting body comprises a cylindrical socket portion axially cylindrically extending from the fitting body ends and having an outer diameter equal to the inner diameter of the core. The socket portion has a sealing surface at its end. The fitting body further comprises a cylindrical securing portion axially extending from the fitting body ends and formed coaxially around the socket portion to form an insertions space. The securing portion has a securing wall facing the socket portion and holding, together with the socket portion, the tube inserted into the insertion space. The box nut comprises a holding surface facing the sealing surface.

Abstract: The invention of this disclosure is an economical sealing device that utilizes two seals to protect an electrical power cord or cable from its environment. The cord or cable couples a power source to electrical equipment that is located behind a material. A standard cord grip is used to push a molded assembly, (which is located at the end of the cable passing through the material) against a molded seat assembly to obtain a first seal. The second seal is obtained by tightening the cord grip with a nut.

Abstract: An anti-twist strain relief bushing for use with an exteriorly threaded tubular pipe for nondestructively restraining an electrical cord against axial or torsional displacements. The bushing comprises an interiorly threaded gland nut to be screwed onto the tubular pipe and an insert to be wedged into the pipe by the nut. The gland nut comprises a circular top defining a circular beveled opening, an integral flange spaced apart from the top parallel and concentric with the top, and an internally threaded, tubular body extending from the top to the flange defining a passageway concentric with the beveled opening and the flange. The body has a plurality of radially spaced apart raised ribs longitudinally disposed on its exterior. The underside of the top and the body define an integral, beveled shoulder disposed interiorly within the passageway. The insert comprises two separate, mirror image halves adapted to be folded together when the insert is forced into the pipe.

Abstract: A double wall compression fitting is dimensioned for attachment to a double wall pipeline system having an inner pipeline and an outer pipeline. The fitting is comprised of an inner housing having at least two terminals, an outer housing encasing the inner housing in a manner to form an annular space therebetween and a compression connecting assembly. The compression connection assembly connects the inner and outer housings to the double wall pipeline system so that the annular space between the housings is in communication with an annular space between the pipelines of the double wall pipeline system. The compression connecting assembly includes a coupler with means to compress it to form a compression seal with the outer pipeline, and a compression spacer with at least one lateral communication port.

Abstract: An improved apparatus for connecting first and second conduits having first and second bores, respectively to provide communication between the first and second bores which may be used with temperatures and/or wide variations in temperature. While a biasing element is used to provide a sealing ferrule with sufficient force to seal the second conduit, a ferrule forming screw may be used to form an initial seal if a conduit is used that is undersize with respect to the ferrule. A quick-lock adaptor is also attached to the base of the connector which adapts the connector for use with standard tubing fittings.

Abstract: A strain relief electrical cable fitting includes an externally threaded metal tubular body member divided by an inside inclined shoulder and outside flange into an upper compression chamber and a lower coupling section, a gland cap with a central top opening engaging the body member top thread.

Abstract: A tube fitting for joining resinous plastic tubing comprises a fitting body having an opening with a conically shaped camming mouth. A tube extends into the opening. A first ferrule is slidably received on the tube and has an exterior surface which faces the camming mouth. A second ferrule is also slidably received on the tube at a location outwardly of the opening and the first ferrule. The second ferrule has a nose portion which engages the first ferrule adjacent the tube and is snap fitted within a recess formed circumferentially of the tube prior to association of the tube with the fitting. The nose portion of the second ferrule is engaged in the recess in axial driving engagement with the tube prior to make-up of said fitting. A nut member is threadedly engaged with the body for driving the first and second ferrules into the camming mouth during fitting make-up.

Abstract: A plastic electrical connector for connecting liquidtight flexible electrical conduit to an electrical component such as a junction box or outlet, comprises a plastic body and a plastic gland nut threadably attached thereto. The body includes a plurality of flexible fingers, each of which includes a collapsible section defined by plural, discrete hinges, the deformable section being bendable at each hinge. Gripping teeth are provided on the interior surface of the ends of the flexible fingers. The gland nut includes an inclined surface engageable with the flexible fingers for causing radial compression against the conduit. The gland nut further includes a pushing surface for engaging the distal end of the flexible fingers, which are preferably arranged in cantilevered form. Upon tightening the gland nut on the body, the gripping fingers engage the conduit, and as the collaspsible sections bend, the fingers axially move the conduit deeper into the connector for a liquidtight seal therewith.

Abstract: The invention relates to a method and apparatus suitable for example in enabling the installation of a casing hanger within a bore in an oil-drilling wellhead in a manner so that the installation and the sealing-in of the casing hanger is accomplished in a single operation. The invention thus comprises installing a component (2) within a bore (4) so as to be received therewithin in a fluid-type manner utilizing expandible seals (8) and a shoulder (36) within the bore (4) adapted to be contacted by a leading edge (32) of one of two concentrically arranged sleeve members (12, 14) which are driven downwardly within the bore towards the shoulder, the two sleeve members which encircle the component (2) being secured together by shearable links (25).

Abstract: Pipe joints, particularly a restraining joint for use in bell and plain pipe end assemblies. The joint includes a gland having a conical axial aperture which encircles the plain end of the pipe; a split ring also encircling the plain end of the pipe is set in juxtaposition with the gland and this ring includes a peripheral flange which seats in the gland. The split ring has a conical exterior complementally engaging the conical axial aperture in the gland and a plurality of pipe gripping teeth defined in its inner surface. A compressible gasket is interposed between the split ring and the pipe bell. The restraining joint is particularly effective in joining plastic pipe and bell assemblies.

Abstract: A strain relief electrical cable fitting includes an externally threaded tubular body member divided by an inside inclined shoulder and outside flange into an upper compression chamber and a lower coupling section, a gland cap with a central top opening engaging the body member top thread. Housed in the compression chamber is an assembly of a rubber packing member and a nylon grip member, the packing member including an upper axially bored cylindrical section and peripherally spaced longitudinal fingers and the grip member including an upper ring encircling the packing fingers and abutting the cylindrical section underface and longitudinal fingers interdigitating the packing fingers and terminating in follower sections engaging the shoulder so that tightening of the cap compresses the packing member by way of a washer to advance and contract the grip fingers to clamp a fitting engaged cable and to contract the packing section bore and effect a hermetic seal of the cable.

Abstract: A coupling assembly for mechanically coupling the plain end of a pipe, comprising a pair of standard forged flanges as basic components between which is disposed a wedge ring. One of the flanges is of the slip-on type and has associated with it a conical collet bore for receiving the wedge ring. When tension bolts assembled through the flanges are tightened the wedge ring is driven into the collet bore and tightly radially against the periphery of the pipe to thereby lock the coupling to the pipe.

Abstract: A pipe joint has a tubular retainer for inserting pipes to be coupled therein, a joint body fitted over the retainer and having a socket holder, and a tubular socket movably disposed around the socket holder. When connecting the pipes to each other, the pipes are inserted into the retainer and positioned therein, the joint body is fitted over the retainer, and the socket holder is brought over the socket holder until the socket is held against a positioning member on the socket holder. A spring in a positioning groove in the socket holder is resiliently displaced radially outwardly partly into a smaller-diameter recess in the socket while partly remaining in the positioning groove, whereupon the socket is retained on the joint body against removal.

Abstract: A pipe union for joining two pipe ends in an end-to-end relationship. On each pipe end a flange, at least one clamping element, and one chamber element are fitted , which can be braced against one another and which among them enclose a shaped seal, each of whose two axial ends protrudes into a respective adapted recess of the chamber elements covering the seal. The seal is an outer elastomer ring supported on the jacket faces of the two pipe ends and has a central annular groove open to the inside. An inner ring that overlaps the butt joint is loosely pressed into this central annular groove. The clamping elements are supported with a radially inwardly located clamping rim on the associated pipe end, and with a radially outwardly located clamping rim on a clamping face disposed concentrically with respect to the pipe ends.

Abstract: A method of replacing an inlet valve for a hot water tank, comprising removing the existing valve and inserting a new valve particularly adapted for use in the present invention. The new valve is connected to the pipe end portion of the inlet pipe by means of a compression nut and a ferrule, with the compression nut attaching to exterior threads on a first connecting portion of the valve. Then the flex tube connecting member is interconnected with the exterior threads of a second pipe connecting portion. The valve itself is a gate valve with a full flow through passageway, and the two exteriorly threaded connecting portions are to be connected to the compression nut and the flex tube connecting nut, respectively.

Abstract: The disclosed fitting connects a tubing end to a fluid conducting member which have a fluid port and end walls surrounding the port and a threaded portion surrounding the end wall. The fitting comprises a ferrule of resilient deformable material having a forward portion with a wide flat sealing surface which is adapted to mate with and sealingly engage the end wall surrounding the port. The ferrule has a throughbore with a diameter through its rearward portion being sufficient to receive the tubing end and the diameter through the forward portion being smaller than the tubing exterior thereby forming a tubing abutting shoulder within the ferrule. The ferrule is forced into sealing abuttment with the end wall of the fluid conducting member and into sealing engagement around the tubing by means of a fastener having a throughbore for receiving the tubing which is flared at its forward end to present conical walls for axially engaging the rearward end of the ferrule.

Abstract: A reversible lock and seal apparatus for coupling swimming pool piping and fittings, comprising a frusto-conical U-cross section metal ring with longitudinally spaced circular rows of teeth, adapted to be cammed into piping by a follower coupled to the fitting for locking the piping to the fitting without need of piping threads or solvent cements, and squeezing a seal ring therebetween.

Abstract: A retaining piece 6 is urged against a pipe A by a push bolt 5, which has an inclined engagement surface 20 in forced engagement with a complementarily inclined engagement surface 16 of a push bolt insertion hole 14. When the pipe A experiences a force tending to dislocate it, the piece 6 is turned such that a ridge-like edge 25 formed at the bottom 23 of the piece 6 wedges into the pipe A, thus preventing the dislocation of the pipe A. The bottom 23 of the piece 6 and also ridge-like edges 24 and 25 formed at the bottom have curved shapes conforming to the outer periphery of the pipe A, so that the edges 24 and 25 can be readily in close contact with the pipe outer periphery. The piece 6 is retained in a ring body 4 by a retainer 7.

Abstract: A water faucet inlet line connector for providing a quick and reliable attachment of an inlet water line to the shank of a water faucet is disclosed. The connector is comprised of an assembly of two body members entrapping a conical spring washer therebetween. The upper body member has a tapered outer surface for cooperating with the conical inner surface of the connection end of the faucet shank, and preferably includes on its inner cylindrical diameter a ring-like inward protrusion to provide a ring-like region of increased pressure against the inlet tube when the connector and tube are finally locked in position. The lower body member also has a cylindrical inner surface, and cooperates with the upper body member to retain the conical spring therebetween, to align the water line and to provide a stress relief to help isolate inlet line motion from the region of the conical spring and the upper body member.

Abstract: A compression type coupling 10 for pipes has a body member 12 and a fastener member 14 and a ferrule 16 wherein the fastener member has a perpendicular shoulder 36 with respect to a longitudinal axis of the pipe 18 and abuts a squared shoulder section 42 of the ferrule to prevent the ferrule from being squeezed out of the compression coupling 10. The ferrule has outwardly radially extending flanges to retain it within the fastener member. The ferrule also has radially inwardly extending teeth that bite into the pipe to prevent the pipe from backing out. The ferrule also has an axially inner section 40 with notches 62 formed therein. The end 40 is deformed by a camming surface 28 on the body 12 to crimp the pipe 18 as the fastener member 14 is secured to the body member 12. The axially inner section 40 forms a right angled shoulder that abuts the pipe and prevents the pipe from being easily pulled out of the coupling.

Abstract: A system for sealing a pool or spa fitting includes a wall having a frustoconical hole therethrough, the hole expanding towards the outer side of the wall. A conduit or inlet fitting is disposed in the hole and has an integrally formed enlarged end portion which abuts the inner surface of the wall. The fitting also has an externally threaded portion opposite the enlarged end, and a nut is threadably disposed on the fitting. A resilient, rubber seal such as a V-gasket or O-ring is disposed interjacent the fitting, the nut, and the surface of the hole. This construction ensures a positive seal of the spa or pool fluid system, while being of substantially simpler and less expensive construction than prior sealing systems.

Abstract: A fitting for rigid conduit including an annular body receiving the conduit and including a seal assembly utilizing an elastomeric seal axially compressed and radially expanded to engage the conduit by a compression ring. A ring retainer maintains the seal assembly in a preliminary position during shipping and assembly of the coupling with the conduit, and the ring retainer includes a second position retaining the seal in a sealed expanded condition. The fitting also includes a conduit positioning abutment capable of accommodating conduit displacement during sealing.

Abstract: An electrical cable gland is provided which can be effectively clamped to metal strip types of armouring of an armoured electrical cable to effectively resist tension applied to such cable. The electrical cable gland includes at least two, and preferably three gripping dogs movable inwardly towards each other to effectively grip such metal strip armouring preferably between the dogs and on inner supporting sleeve forming part of the gland. Movement of the dogs can be by co-operating tapered surfaces on the dogs and body of the gland with the surfaces being axially movable relative to each other or by radially extending screw threaded fasteners passing through the wall of the body. An inwardly deformable, electrically conductive contact ring can be included, where required for making electrical contact with a lead or other conductive sheath.

Abstract: A pipe coupling is provided having a sleeve with frusto-conical ends, elastomeric gaskets fitting in said frusto-conical ends, a follower at each end of the sleeve, tightening bolts acting on the followers to move them axially together to compress the elastomeric gaskets radially into sealing engagement with the pipe ends, a back up ring having a frusto-conical opening spaced from each follower opposite the sleeve, frusto-conical opening in each said back up ring having its largest opening toward said sleeve, a frusto-conical split jaw in each back up ring and auxiliary tightening means for moving the back up rings towards the adjacent followers to compress said jaws into the pipe ends.

Abstract: The invention relates to a screw joint of plastic for leading-in, leading-through, sealing and pull-relieving cables, lines or other thread-like elements (cable screw joint) comprising an intermediate connection piece with a sealing body inserted therein, and a box nut. The intermediate connection piece is provided with clamping tongues formed integrally therewith and extending coaxially thereto, which clamping tongues retain between them the mounted cable. The arrangement of the clamping tongues is such that when the box nut is turned at least one, preferably more clamping tongues distributed evenly over the circumference are urged inwardly in a selective manner and out of the remaining annular clamping tongue arrangement to exert upon the cable, preferably through the interposed packing, a deforming pressure providing positive protection against torsion of the cable relative to the cable screw joint.

Abstract: A split type sealing device for providing high pressure sealing around a cylindrical member such as a tube. The sealing device utilizes a primary flexible split seal ring element and a rigid split back-up ring, which have their splits positioned on opposite sides of the cylindrical member so as to encircle the member. The seal rings are maintained in position against high sealing pressure by a split seal retainer enclosed by mating clamping means, such as a slotted coupling member having an external threaded end and a mating conduit and ring nut. The pressure axial loading on the tube is accommodated by a split clamp ring which clamps the coupling to the cylindrical member, which is usually a tube. The seal device is suitable for sealing against internal pressures of 0-5000 psi.