Abstract: An easily-assembled, heat resistant connector for releasably joining end portions of three capillary tubes for use in chromatography without interrupting flow or interfering with chromatographic results comprises a main body, and a glass insert which has first, second and third hollow legs that are connected together at a central portion, and a connector that connects each leg of the glass insert to a capillary tube. Each leg of the glass insert extends outwardly from the central portion towards an open end portion, and each leg has an inboard bore with a taper that receives and end portion of one of the capillary tubes. The taper is wider near the open end portion of the leg and narrower near the central portion. The connectors are mounted on the main body and a sealing ferrule is provided in each connector for making a seal between the capillary tubes and the legs of the glass insert.

Abstract: A fitting used to bridge a gap in a conduit between fixed ends of a conduit. The fitting includes a first collar at a first end of the fitting having an open end made to a dimension for fitting closely around one of the ends of the conduit, and the first end being flared inwardly of the open end so the first end of the fitting can be slid over the first end of the conduit, whilst the fitting is held angled axially relative to the conduit such that the second end of the conduit is positioned to one side of the conduit. The first collar is sufficiently deep to allow for the fitting to be slid over the first end of the conduit until the second end of the fitting is clear of a second end of the conduit. The fitting can then be pivoted so as to be in line with the conduit, and then slid back to connect with the second end of the conduit.

Abstract: A pipe coupling comprises an annular sleeve member arranged in use at a free end thereof to overly an end of a plain ended pipe to be connected by the coupling, the free end of the sleeve member being inclined radially outwardly towards its end; an elastomeric annular sealing gasket disposed at least partly within the inclined free end of the sleeve member and held in place by an annular compression flange member; the compression flange having a skirt portion, axially outwardly, and an axially inwardly extending collar portion radially outwardly overlying the free end of the sleeve member; the gasket including, when in a relaxed condition, an axially outwardly directed rear surface arranged in use to engage an axially inwardly directed face of the annular radially inwardly extending portion of the flange member, a radially inner surface extending generally axially inwardly of the coupling from a gasket heel to a gasket toe, and an inclined surface extending generally between the two above mentioned surfaces o

Abstract: A wall penetration sleeve for extending a conduit or pipe through a solid concrete, brick or other wall or connecting a first pipe provided on one side of the wall with a second pipe provided on the opposite side of the wall. The wall penetration sleeve is characterized by a cylindrical sleeve extending through the wall and internally threaded on each end to receive a corresponding pressure nut. Each pressure nut seals an o-ring or gasket in the corresponding end of the sleeve to form a moisture-tight seal between the sleeve interior and the interior of the wall such that liquid or gas cannot leak from the sleeve and accumulate in the interior of the wall as the liquid or gas flows through the pipe. An annular lock collar is either eccentrically mounted on the sleeve or includes a flat segment shaped in the collar edge to prevent the sleeve from rotating or moving transversely in the wall.

Abstract: An improved mechanical pipe joint for use in a bell and plain pipe end assembly. The joint includes a gland having a conical cavity for receiving a toothed split ring that coaxially compresses and grips the plain pipe end as the gland is tightened to the bell. The joint is sealed by a compressible gasket positioned between the split ring and the bell. The gland further includes an integrally formed, radially extending shelf for abutting against the split ring and mechanically stopping the gland from being pulled over the split ring during joint assembly.

Abstract: A pipe connector comprises a body portion 10 having a male threaded tubular portion 12 defining a cavity 14 and comprises a nut 16 with a female threaded portion 18 and an unthreaded portion 20 of lesser diameter defining a bore 22. The junction between the threaded and unthreaded portions 18, 22 is constituted by an annular seat 24 against which is received a thrust washer 26 and against which in turn is received a sealing washer 28 which bears against the end of the male threaded portion 12.A radially split collar 32 has a pair of radially extending arms 34, 36 at the split and a clamping screw 38 passing through holes in the arms 36 and 34 to receive a nut 40. A radially outwardly extending annular slot 44 is formed at the mouth of the clamping means 30 and is a snap-fit over a flange 42 on the nut 16.

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: A split fitting for coupling two tubes, one having a large diameter, one having a small diameter, the fitting having mating first and second halves for surrounding the connection point between the larger and smaller tubes and forming a threaded neck portion for threading engagement with a nut slipped over an end of the larger tube for actuating a compression fitting to seal between the fitting and the larger tube. An O-ring seal is provided within the split fitting for sealing the fitting to the smaller diameter tube when assembled. The fitting halves are coupled together using captive screws and alignment pins.

Abstract: A metal-to-metal annular seal for use in downhole tools which may include annular elastomeric backup seals. In each embodiment, a sealing member has a pair of annular frusto-conical lips adapted for sealing engagement with a cylindrical sealing surface on a member of a downhole tool. The sealing member may be a separate component or an integral part of another member of the downhole tool. A seal energizing member may be used.

Abstract: A metal fitting (11) for an end of a plain length of pipe (12) comprises a body (13) with flange means (14) adjacent a first end (15), a gland ring (16) adjacent the other end (17) of the body, a grip ring (18) between the body (13) and the gland ring (16), and screw fasteners (19) for urging the gland ring (16) towards the flange means (14); characterised in that:the body (13) has an integral outer tubular spigot (20) projecting towards the gland ring (16) and a co-axial integral inner tubular spigot (21) having a cylindrical outer surface (22) projecting beyond the free end (23) of the outer tubular spigot (20), the inside (24) of the outer spigot (20) being provided with a frustoconical portion (25) adjacent and converging from that free end;the gland ring (16) has its inside provided with a similar frustoconical portion (26) converging in the opposite direction;and the grip ring (18) is a split ring having external surfaces (27, 28) mating with the frustoconical portions in the body (13) and the gland rin

Abstract: The invention concerns a coupling device for maximum pressure-tight threaded pipe connectors with a standard coupling body, with a 24 degree connector, a coupling nut to effect a pressure-tight connection, a standard pipe or a connection stub for connection to other system components, and a two-part ring whereby one ring is provided with a holding element which takes the form of a cutting or clamping ring and the second ring takes the form of a sealing ring (6) for the coupling body (1) and is positioned in front of the holding element (7). The sealing ring is provided with a stop face (10) which progresses radially to its ring axis (9) and, when fitted, abuts on to the inner ring face (11 ) of the coupling body (1) which extends over at least a part of the inner bevel face [cone] (2) of the coupling body (1). The sealing element presents a conically progressing sliding face (14) for the holding element (7) and a stop face (15) progressing radially to the pipe or ring axis (9).

Abstract: A cooperating combination of a metallic gland and a metallic grip ring is for both plastic pipe and metallic pipe used in fluid piping systems, where these pipes are part of assembled restrained sealed bolted joints. The grip ring, in addition to two well spaced major sized teeth, has several spaced minor sized pipe gripping circumferential teeth located between and beyond the major sized teeth. The major sized teeth extend radially inwardly farther than the minor sized teeth within the grip ring. When the installed grip ring is restraining a metallic pipe, only the major size teeth are, in part, penetrating the metallic pipe. When this installed grip ring is restraining a plastic pipe both the major size teeth and the minor size teeth are penetrating the plastic pipe. The major size teeth take a lot of concentrated force, which is created when the fasteners of the bolted joint are tightened.

Abstract: A corrosion resistant and low torque connector with a brake tube having a flange adjacent a flared end on which an O-ring is received and urged into a sealing engagement with a frusto-conical cavity of a female fitting by a complementarily threaded male fitting received over the tube and bearing on the flange.

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: A socket joint for ductile cast iron pipes is locked by toothed locking ring inserts 15 and a counter-flange 11. At least one elastic lip 19 is inserted between the locking ring and the rear face of a rigid stop ring which encloses the smooth or male end of the pipe 1.

Abstract: An easily-assembled, heat-resistant connector for releasably joining end portions of two capillary tubes in end-to-end fashion for use in chromatography without interrupting fluid flow or interfering with chromatographic results, comprises a cylindrical sleeve which has a bore which tapers toward a center point to form press-fit seals with the tips of two capillary tubes. A first ferrule is mounted on the end portion of a first capillary tube, and a second ferrule is mounted on the end portion of a second capillary tube. A jacket surrounds and contains the sleeve, and a first adjustment screw mounted on the jacket pushes against the first ferrule to deform the ferrule into sealing contact with the outside surface of the first capillary tube and with the inside surface of the sleeve. A second adjustment screw mounted on the jacket pushes against the second ferrule to deform the ferrule into sealing contact with the outside surface of the second capillary tube and with the inside surface of the sleeve.

Abstract: An improved apparatus for connecting first and second conduits, which may be capillary columns, having first and second bores, respectively, to provide communication between the first and second bores for high temperature operation over wide variations in temperature. A monolithic fused quartz seating element is removably insertable into a seating chamber of a base that may be comprised of steel or other metal. The monolithic fused quartz seating element may be cylindrical and have frustoconical surfaces defining first and second receiving formations. First and second slidable followers biased by first and second quartz springs apply pressure against first and second ferrules to seal between the first and second receiving formations, and the first and second conduits, respectively.

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: In a pipe joint made of resin in accordance with the present invention, a primary sealing is formed between an inner ring pressingly inserted into an insertion portion of a pipe at its one end to increase the diameter thereof, and the joint body into which the insertion portion of the pipe increased in diameter, is being inserted. When the threaded connection of a pushing ring to the joint body is advanced, a sealing force is applied to the primary sealing. The inner ring has an inner diameter equal to that of the joint body and that of the pipe, assuring a smooth movement of a fluid in the pipe without the fluid remaining at the joint.

Abstract: A pipe joint consists of a sleeve (2) surrounding a socket chamber (3) for receiving a spigot (5). A gland (9) extends into the socket chamber (3) against a heel portion (12) of a sealing ring (7). Axial movement of the gland (9) forces the sealing ring (7) and causes a leading nose portion (14) of the sealing ring (7) to be deflected radially inwardly by the internal profile of the sleeve (2) against the external surface of the spigot or pipe end (5), thereby forming a seal. The heel portion (12) of the seal ring (7) maintains substantially the same radial position in the socket (3).

Abstract: This invention relates to a novel counter flow tube-manifold heat exchanger which can be installed in a wood or concrete floor and used to heat the floor and the earth space associated with the floor. A heat exchanger for conveying a heat containing fluid material in counter flow pattern comprising a hollow conduit comprised of three hollow elongated resillient fluid conducting tubes which are disposed parallel to and are joined to one another; and a first hollow elongated manifold with ports therein; and a second hollow elongated manifold, with ports therein adapted for connection with the ends of the tubes, the first ends of two of the three tubes being connected to the ports of the first manifold and the opposite ends of the same two tubes being connected to ports of the second manifolds, and the first end of the third tube adjacent the first ends of the two tubes being connected to a port of the second manifold, while the opposite end of the third tube is connected to a port of the first manifold.

Abstract: An improved method of coating a pipe coupling with a corrosion resistant polymeric coating includes coating an entire coupling, then simultaneously forming an upstanding flange on the coupling body when, in the parting process, the body and nut are separated. The improved coupling is adapted to utilize a moisture barrier between thee nut and the flange.

Abstract: An apparatus for connecting first and second conduits having first and second bores, respectively, to provide communication between the first and second bores. The apparatus includes a base attached to the first conduit and a cap attached to the base. A follower is slidably disposed in the cap and is provided with a passageway, the second conduit extending through the passageway. A ferrule is received on the second conduit, the ferrule having a first end and a second end. The follower is biased against the first end of the ferrule. The first bore in the first conduit has a frustoconical surface which defines a receiving formation for the ferrule, the ferrule having a portion which is circular when viewed in transverse cross section. When the second end of the ferrule is urged in the receiving formation by the action of the biasing spring, the ferrule engages the frustoconical surface defining the receiving formation in substantially line contact.

Abstract: Described herein are heat recoverable composite coupling comprising an outer, tubular heat-shrinkable sleeve and a hollow insert member adapted to receive plural substrates. The insert member has a tapered surface to allow it to accommodate substrates of different sizes. Recovery of the outer member forces the insert member into secure contact with the substrate forming a union between the substrates.

Abstract: A fitting made up of a body, a ferrule and a nut. The ferrule has a reduced size cylindrical member that is received in an end of a thin wall tube. The nut and the deformable ferrule are placed over the tube. The nut is wrenched onto the body, which deforms the ferrule at the ferrule groove displacing material of the ferrule inwardly against the tube, bringing the inner surface of the ferrule into sealing engagement with the outer surface of the tube and the inner surface of the tube with the outer reduced cylindrical surface of the body and at both faces of the ferrule. A seal is thus accomplished at the inside surface of the ferrule, forcing the tube into engagement with the reduced size member of the body, thereby reinforcing the tube.

Abstract: A gripping and sealing or coupling device particularly useful for heavy-walled tubular members includes a body member having first and second counterbores cooperatively receiving first and second ferrules therein. Radial expansion of the first ferrule on makeup of the device is limited by a cylindrical radial flange on the end of the ferrule and by radially dimensioning the first counterbore so that it is substantially less than a minor diameter of the threads of an associated coupling nut or on the coupling body. The holding forces of the ferrules is enhanced by limiting radial deformation while disassembly and reassembly of a coupling arrangement is readily facilitated.

Abstract: A weldless pipe repair assembly comprises a cylindrical hub member having a through bore, the hub member being formed in two separable, mating parts for slidable interfitting engagement, a first one of the parts having a longitudinal slot for fitting the part transversely over a pipe in the area of a leak or rupture, prior to sliding the second part into engagement with the first part so that the hub member surrounds the pipe. At least one sealing sleeve is designed to fit in the hub bore to seal the space between the pipe and hub member, the sleeve being slit to allow it to fit over the pipe, and a locking assembly is provided for urging the sleeve into the hub member and sealing the sleeve against the pipe.

Abstract: A rigid coupling for plain ended pipe includes radially inwardly movable wedging members of a hard but ductile material, which optionally may be in the form of a collet, and a member providing a camming surface corresponding with an external camming surface on each of the wedging members, the wedging members each having an axially straight inner surface for cooperation with the external axial surface of a pipe, the inner surface of the wedging members being coated with a grit material of a hardness greater than that of the pipe and that of the wedging members, for it to become matrixed within the respective surfaces on the application of compressive forces to the wedging members.

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 connector for tapered glass joints includes a first glass tubing section having a tapered sealing surface on an inner end surface thereof and threads on an outer surface of said end. A second glass tubing section has an end adapted to be telescoped into the end of said first tubing section, and a replaceable, resilient sealing sleeve is adapted to be sealingly engaged concentrically between the outer end surface of the second tubing section and the inner end surface of the first tubing section. A threaded cap is adapted to be threaded onto said threads of said first tubing section to secure the parts together and to force the sealing sleeve into tight sealing engagement with the respective tubing surfaces.

Abstract: Described herein are heat recoverable composite couplings comprising an outer, tubular heat-shrinkable sleeve and a hollow insert member adapted to receive plural substrates. The insert member has a tapered surface to allow it to accommodate substrates of different sizes. Recovery of the outer member forces the insert member into secure contact with the substrate forming a union between the substrates.

Abstract: A fitting for joining a tube to a threaded body member includes a nut having a conical camming surface and a collapsible sleeve with a mating conical surface and internal annular serrations for gripping the tube. A seal in the face of the body member seals against a front transverse shoulder of the sleeve while an internal groove in the sleeve houses an o-ring for sealing against the tube. The rear wall of the groove is in a dogleg configuration and is engaged with the rear end of the sleeve to be collapsed therewith into close engagement and embedment with the tube to prevent seal extrusion at high pressures. The sleeve includes stop shoulders thereon to limit threaded engagement of the nut and thus the collapse of the sleeve and is disclosed in one and two piece embodiments.

Abstract: A coupling for swaged attachment to thin wall tubing. The coupling is a cylindrical body with a longitudinal axis and an inner peripheral wall. At least one groove is located in the inner peripheral wall. In one embodiment, the groove is substantially rectangular in cross section. The rectangular groove has a base and two side walls. The side walls meet the base to form corners. The corners have a radius of curvature of at least the depth of the groove. Alternatively, the cross section of the groove can be ramped in shape. The ramped shape groove has a base and two side walls. One of the two side walls meets the base at about 90.degree., and the second side wall meets the base at an angle substantially greater than 90.degree.. In a third embodiment of the invention, the groove is ramped with one side wall meeting the inner peripheral wall of the coupling sleeve at about 90.degree.

Abstract: A two-piece, all plastic connector for connecting a flexible conduit to an electrical fixture comprising a threaded connector cap having an extending wedging ring and a mating threaded connector body having a deflection ramp. The connector body is secured to an electrical fixture and the connector cap is loosely threadably engaged with the connector body. The conduit is inserted through an opening in the connector cap until it abuts the bottom of an annular cavity in the connector body. The cap is then tightly screwed onto the body such that the wedging ring is cammed, by the deflection ramp, into engagement with the conduit to securely grip the conduit. This arrangement provides a liquid-tight seal.

Abstract: A gripping and sealing or coupling device particularly useful for heavy-walled tubular members includes a body member having first and second counterbores cooperatively receiving first and second ferrules therein. Radial expansion of the first ferrule on makeup of the device is limited by radially dimensioning the first counterbore so that it is substantially less than a minor diameter of the threads of an associated coupling nut or on the coupling body. The holding forces of the ferrules is enhanced by limiting radial deformation while disassembly and reassembly of a coupling arrangement is readily facilitated.

Abstract: Two embodiments of a push in tube fitting converter are disclosed. Each includes a nut, a tube gripping member such as a collet or ring, an O-ring, and a sealing retainer. In one embodiment, the interior of the nut includes a threaded portion at one end, a cylindrical seal seat, and a smaller diameter end cylindrical portion, with an internal shoulder between the threaded portion and the seal seat. The gripping member operatively engages the interior of the nut. The O-ring forms the seal between the seal seat of the nut, and tubing inserted through it. The sealing retainer is engaged by the internal threads of the nut to hold the sealing retainer, O-ring, and gripping member in place within the nut. The sealing retainer engages both the internal shoulder of the nut and a fitting body on which the nut is to be threaded, thereby forming the seal between nut and fitting body.

Abstract: Tube ends are received at opposite ends of a bore passage in a block of an electrically non-conductive material. Ferrules encircling the tube ends are compressed to effect a fluid tight seal of the tube ends and block and effective at pressures of about 650 psi. Plates are mounted to the block ends for applying compression force to the ferrule and the plate mounting involves low reactive force in the block.

Abstract: A tubing coupling device constructed in accordance with this invention is comprised of a rigid body having cavity therein, an aperture communicating with the smaller end of said cavity and a tapered ferrule having an axial passageway that is aligned with the aperture. Means such as a nut that is in threaded engagement with the end of the rigid body opposite the aperture forces the ferrule into the cavity. The relative shapes and dimensions of the cavity and the ferrule are such that as the ferrule is forced into the cavity it is subjected to radial compression so as to attain intimate contact with the exterior surfaces of the end portions of tubes that are inside the ferrule.

Abstract: A high-pressure coupling for small-diameter pipe is obtained with standard male and female pipe connectors, three ferrules, an O-ring and a flat metallic washer disposed around the pipe and designed such that when the connectors are hand tightened, the coupling compresses the ferrules, O-ring and flat washer to obtain a coupling that will withstand pressures up to 10,000 psi.

Abstract: A four-piece all plastic strain relief connector for connecting an electrical cord to an electrical fixture comprising a body member and cap member which threadably engage to form a chamber. Located within this chamber is a collet and diaphragm assembly consisting of a flexible diaphragm snap-fit to a semi-rigid collet. The diaphragm has an aperture through which the cord passes and which forms a liquid-tight seal with the cord. The collet has a plurality of deformable tines for gripping the cord. One end of the body member is attached to a through hole in the electrical fixture. After the cord is inserted through the connector, the cap and body members are tightly screwed together such that a protrusion on the body deforms the tines on the collet into engagement with the cord. Teeth on the tines engage the plastic jacket of the cord to provide a secure grip.

Abstract: For servicing clogged air conditioner condensate lines, a coupling assembly is disclosed that provides access to the clogged line. The coupling assembly is adapted for fitting a plurality of differently sized condensate lines. Once connected to the condensate lines, an adapter fitting of the coupling assembly can be used for clearing the line with compressed air. The cut condensate line is then reconnected so that it may continue to a drain the condensate that collects in the drain pan.

Abstract: A connector for and a method of connecting pipe members for a variety of purposes including (but not limited to) plumbing, hydraulics, pneumatics and medical purposes. Wherein the connector which can be used in conjunction with other fittings, has a connector body with an opening to receive a pipe and a tapered internal bore in the opening to receive a substantially coaxial inner sleeve adapted to engage the surface of the pipe in the connector. After insertion, the pipe is then moved in an opposite direction to the direction of insertion and the inner sleeve is adapted to slide wherein internal bore to wedge into frictional engagement and connection with the outer surface of the pipe and the tapered surface of the internal bore so that when the pipe is sealably engaged within the connector the pipe can be disengaged from the connector by a reverse operation.

Abstract: A sealing device is disclosed for sealing a securing device (17) which extends through adjacent flanges (7,9) of a shell (1) and of a head (3) of a fluid container. The sealing device includes an O-ring seal (23) which slidingly engages the securing device (17) for sealing the securing device relative to the flange (9) of the head. A carrier member (25) through which the securing device extends is urged towards the flange (9) of the head such that the O-ring seal (23) is urged into sealing engagement between the securing device (17) and the flange (9) of the head. The carrier member (25) defines a conical recess (35) for reception therein of the O-ring seal (23) such that when the carrier member (25) is urged towards the flange (9) of the head, the O-ring seal (23) is distorted by reaction between the carrier member (25), the securing device (17) and the flange (9) of the head so the securing device (17) and the flange (9) of the head are sealed relative to each other.

Abstract: The pipe (2) is inserted in the through-hole of the flange (1) and the pipe-flange seal is assured by a fixing ring nut (6) screwed into the upper portion (5) of the hole.The hole, in the part opposite the threaded area (5), has an area (4) with a diameter equal to that of the pipe (2) and a truncated-cone coupling area (4) between the two areas (5) and (7). A ring (8) of elastomeric material is inserted inside the truncated-cone portion (7) and an annular projection (9) on the pipe (2) acts thereon, pushed by the screwing action of the ring nut (6).

Abstract: A weldless high-pressure pipe fitting, which can be incorporated in a pipe flange or pipe coupling, utilizing a deformable sealing sleeve of ductile material having a constant inside diameter sized to closely fit over the end of a pipe of a given size without galling and an outer frusto-conical surface which mates with a complementary frusto-conical inner surface of a rigid collar which tapers to a diameter equal to the inside diameter of said sealing sleeve. Said sealing sleeve annularly protrudes from said collar so that a rigid circular locking flange may be tightened against the end of said collar from which said sealing sleeve protrudes, circularly compressing said sealing sleeve between the outer surface of said pipe and the inner frusto-conical surface of said collar, locking and sealing said collar to the end of said pipe.

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 hose coupling device comprises a first thrust surface formed on one end of an objective member having a tubular connecting portion to which a hose is to be coupled, the first thrust surface extends radially outwardly around the base portion of the tubular connecting portion; a second thrust surface formed on the end surface of an annular thrusting member adjacent to the objective member, the annular thrusting member being disposed around and coaxially with the tubular connecting portion with an annular gap therebetween and movable axially relatively to the tubular connecting portion, the second thrust surface opposing to the first thrust surface such that the space defined between the thrust surfaces is converged radially outwardly; a radially contractable and expandable annular tightening member contacted at its both sides by the first thrust surface and the second thrust surface, respectively, and disposed coaxially with the tubular connecting portion, the annular tightening member including a circular co

Abstract: A pipe coupling joint including a pair of rubber packings, with one each being installed onto the outer circumferential surface of one of two pipe segments at the area near the leading end thereof set in alignment and closely opposed relationship with each other, a middle ring of cylindrical shape disposed closely in the middle position between the pair of rubber packings, and a pair of clamp rings. The two pipe segments are joined with each other by having the pair of rubber packings secured and urged in an operative position of engagement between the clamping face of the middle ring and the pair of clamp rings, wherein each of the rubber packings is defined with the top corner at the outer circumference thereof cut away at an oblique angle with respect to its mating surface with the middle ring, and wherein there is formed a step formation which rises at a substantial angle with respect to the inclined clamping face of the middle ring.

Abstract: An improved pipelock comprising a first pair of rings facing each other axially, with the inner diameter of each ring at the outer face being smaller than the inner diameter of each ring at the inner face, each of said first pair of rings comprising at least two circumferential parts, means to restrain longitudinal movement of facing circumferential parts outwardly from each other, at least one second ring comprised of at least two circumferential parts connected to each other, outwardly surrounding said first pair of rings, and constraining outward radial movement of said first pair of rings, at least one third ring comprised of at least two circumferential parts, having an outer surface conforming to the inner surface of said first pair of rings, and at least one waffled fourth ring comprised of at least two circumferential parts having an outer surface in contact with the inner surface of said third ring.

Abstract: A pipe coupling for the joining of plain end pipe that includes an annular gasket and a compressible lock ring at each end of the coupling between a tubular middle ring and an annular follower. Bolts extending between the opposite followers are effective when tightened to compress both the gasket and lock ring into their operative relation for sealing and gripping a coupled pipe end, respectively. An annular recess contained in the backface of the gasket affords a clearance of controlled dimension initially about the juxtaposed portion of the lock ring. The clearance functions when the bolts are tightened to enable gasket sealing pressure to be achieved about the pipe sequentially before an effective grip on the pipe is attained by the lock ring.