Abstract: A socketless fitting for releasable connection of a pressurized line. The fitting has a housing body with a receiving opening to insert one end of the line, and an inner sleeve attached in the housing body in an arrangement that extends coaxially within the receiving opening for engagement into the inserted line end. The inner sleeve is fastened in the housing body media-tight around the periphery via connectors and preferably engages in the line media-tight around the periphery. Media-tight outward sealing is accomplished by sealing engagement of the essentially rigidly secured inner sleeve in the line, because the inner sleeve itself is also tightly joined to the housing body.

Abstract: A simple water spray hose rolling device includes a water spray hose, an inlet connector and a spray connector at the two ends of the water spray hose, an upper fixed base, an under fixed base, a locking ring, and an elastic connection between the two bases. Edge strips at two sides of the water spray hose are enclosed by two semicircular splints in the interior of the inlet connector to affix the water spray hose to the inlet connector. The two fixed bases include two symmetrical T-shape clamping plates connected by an elastic connector. Through the fillister formed between the two T-shape clamping plates, the water spray hose of this invention can be rolled up and stored.

Abstract: A flexible hose assembly used for pull-out faucets includes a hose having an inner tube and a spiral wound outer jacket. The hose assembly further includes at least one end connector disposed on an end of the hose that includes a jacket fitting having a tubular portion disposed between a spiral wound outer jacket and the inner tube. The tubular portion of the jacket fitting includes an externally threaded portion that engages the inner surface of the spiral wound outer jacket. The jacket fitting further includes a flange disposed at a distal end of the tubular portion wherein the flange abuts a distal end of an outer ferrule. The end connector also includes an insert fitting having a flange positioned on a distal end of a tubular portion. The tubular portion includes at least one external barb that engages the inner surface of the hose. A coupling nut with a central bore with a shoulder disposed therein receives the jacket fitting and the flange of the jacket fitting abuts the shoulder of the central bore.

Abstract: A connector is disclosed for use with composite spoolable pipe such as for use in well logging and workover operations in oil wells. The pipe which is spoolable is comprised of an outer composite structure containing several plies of high strength and stiffness fibers embedded in a resin material such as epoxy. The fibers are oriented to resist internal and external pressure and provide low bending stiffness. Fibers of high strength and modulus are embedded and bonded into a matrix that keeps the fibers in position, acts as a load transfer medium and protects the fibers from environmental damage. The plastic binder in which the fibers are embedded to form the matrix will have a modulus of elasticity (hereinafter modulus) that exceeds 100,000 psi. Typically, a liner may be employed in the pipe to serve as a structural member, one function of which is pressure containment to resist leakage of internal fluids within the tubing.

Abstract: A hose connector comprises (a) a tubular nipple comprising one end insertable into an end of a hose, the one end defining an annular shallow recess of a depth of 0.2 mm to 0.

Abstract: A connector element is provided for variably laying and protecting insulated electrical conductors or cables for interconnecting the electrotechnical devices and lightning protective systems in aircraft and spacecraft. The connector element (29) includes a protective corrugated hose (25) connected to a screw-on component (1) by a collar nut (3) screwed onto the screw-on component (1). The collar nut (3) engages a flange (26A) on an end of the hose (25) and clamps it against the screw-on component (1). Insulated electrical conductors or cables (8) are guided through the hose (25), which is conductively connected to the aircraft structure. The hose (25) serves to protect, hold, and guide the electrical cables (8) in a desired configuration. The corrugated hose (25) includes a compressed portion (25A) with a small corrugation spacing, whereby the hose (25) is bendable into a desired configuration, yet is form-retaining and flexurally stiff to maintain the bent configuration.

Abstract: A fitting for use with corrugated stainless steel tubing. The fitting includes a body having a locating sleeve. The locating sleeve aligns the central axis of the body with the central axis of the tubing. A nut, retained on the tubing by split ring washers, is tightened on a threaded end of the body. As the nut is tightened, a taper formed on the body flares the tubing. The flared tubing is compressed between the taper on the body and a beveled section of the split ring washer. This forms a leak proof fitting without the need for separate flaring tools.

Abstract: A hose connector with gripping elements (18) pressing a hose (14) on a socket (15) uses a two-part sleeve (24). The two-part sleeve includes a screw piece (25) and an extension sleeve connected to the screw piece by a rotary connection and the two-part sleeve surrounds and supports the hose for a significant portion beyond the clamping area of the gripping elements (18). This inner sleeve (32) also has the funnel-shaped, conical actuating surface (33) for the pressing of the gripping elements.

Abstract: A connector for a composite pipe includes a male conical member to be inserted between inner and outer layers of the pipe. The outer layers have oppositely wound composite strips which are overlapped along the conical surface. The ends of the strips are braided and a cup located over the conical surface. A filler is injected between the cup and conical member to fill the voids formed between the overlapping strips.

Abstract: A coupling for engagement with the outer surface of a polymeric pipe, having a sub-assembly of a compression sleeve (24), a resilient gasket ring (18) permanently attached to the inner end of the compression sleeve (24), a gripping member (25), and a nut (30). The gasket ring (18) encounters an abutment in a socket (17) in the body (12) as the nut (30) is tightened, and further tightening of the nut (30) radially compresses the gripping member (25) so that its inwardly directed barbed projections (26) engage the outer surface of a pipe (11) to which the coupling is attached. The end of pipe (11) is freely insertable through the gripping member (25) and sleeve (24), and into the socket (17) in the body (12). There are also provided abutment surfaces within the body coupling and the nut which abut inner and outer surfaces (34, 35) of a flange outstanding from the outer end of the compression sleeve (24).

Abstract: A coupling for connection to an end of a hose to allow fluid to pass therethrough. The coupling comprises a tapered end inserted into the end of the hose and a tapered collar fitted on the outside of the hose. Once assembled, the collar provides uniform compression of the hose about the tapered end thereby preventing detachment or leakage. The coupling is designed such that it can be field installed and uninstalled without the need for specialized installation tools.

Abstract: A reusable hose fitting, which may be assembled using simple hand tools, includes a fitting body having an exteriorly threaded section on which is received a threaded bore of a compression nut. The fitting body includes a nipple having a diameter somewhat less than the threaded section and joined thereto by an annular locating surface. A compressible sleeve is located within the compression nut and has a pair of axially spaced, frusto-conical exterior surfaces which cooperate with complementary interior surfaces of the compression nut to exert a pair of axially spaced zones of pressure to clamp a hose, that has its end positioned against the locating surface of the fitting body, against the nipple. Cooperating surfaces of the compression nut and compressible sleeve prevent the latter from being accidentally dislodged from the compression nut once inserted past the threaded bore of the nut.

Abstract: A rubber hose is coupled to a metal tube by a connector having an inner tubular component which is fixed within an internally threaded sleeve and which telescopes into the end portion of the hose. An externally threaded sleeve is rotatable on the end portion of the hose and, when tightened into the internally threaded sleeve, engages a nut on the end portion of the hose to force the tube axially onto a frustoconical portion of the tubular component and establish a seal around the hose. The thread of the nut is of opposite hand from the threads of the sleeves to prevent the nut from running off of the hose if the nut is turned during tightening of the externally threaded sleeve.

Abstract: A blast nozzle holder for securing a blast nozzle and a supply hose thereto comprises a hollow holder body which includes a converging bore therethrough, a hollow securing nut which can be threaded into the bore of the holder body and a compression member which is pushed through the converging bore of the holder body by the securing nut and which is compressed around the exterior of the blast hose during passage through the converging bore so as to squeeze the exterior of the blast hose and hold same firmly in place in the holder body.

Abstract: A plumbing hookup kit includes a length of flexible tubing having terminals mounted on each end; different sized brass compression nuts; a brass ferrule; a pair of identical plastic sealing sleeves of one size and a pair of identical plastic sealing sleeves of another size; four identical split locking ring components, pairs of which are adapted to be combined into a locking ring; a pair of identical sealing rings of one size and another larger sealing ring. Different components of the plumbing hookup kit enable the establishment of a fluid tight connection between any of a number of different male threaded fittings in 3/8", 7/16" and 1/2" sizes, each of the type that cooperates with a corresponding one of a plurality of coupling nuts.

Abstract: A connection system for a deformable conduit with a support portion which is inserted within an end of the conduit. The support portion has a hollow interior and an external contour with first and second surfaces. First and second portions of the deformable conduit are outwardly displaced by the first and second surface. A clamp assembly having an end piece and a sliding ring engage the first and second portions of the displaced conduit, respectively. A pressing portion is positioned over the clamp assembly and pinches the conduit against the support portion.

Abstract: The connecting device comprises a connecting body (12) and at least one connecting piece (20) adapted for having plugged thereon the end portion (24) of the plastic tube (14) to be connected. The outer diameter of the connecting piece (20) is slightly larger than the inner diameter of the plastic tube (14). Prior to plugging the plastic tube (14) onto the connecting piece (20), a pressing sleeve (28) is shifted onto the plastic tube (14). The inner diameter of the pressing sleeve (28) is selected such that the pressing sleeve (28) can be pressed onto the end portion (24) of the plastic tube (14) plugged on the connecting piece (20). During this process, the plastic tube (14) is displaced in axial direction until its forward end is received in a receiving groove (46) annularly surrounding the connecting piece (20) and being open towards the plastic tube (14).

Abstract: In a pipe connection, in particular for plastic pipes and hoses (2, 9), having a support portion (6) disposed in the interior of the pipe to be connected, and a clamping means (4, 5, 21, 22) which is provided on the outside of the pipe and which comprises a sealing portion (4) and a pressure-applying portion (5), the sealing portion (4) is made from a yielding material, preferably plastic material, and the pressure-applying portion (5) comprises metal, the pressure-applying portion (5) externally surrounding the sealing portion (4).

Abstract: A base member has an elongate bore, a base end, a distal end, an elongate inner sleeve extending from the base end to the distal end, a generally frusto-conical outer surface having a larger diameter adjacent to the base end and a reduced diameter at the distal end, and a radially extending flange attached to the base end of the inner sleeve. The outer surface of the inner sleeve has axially spaced protrusions positioned along its length. An outer sleeve extends around the inner sleeve, has an annular base portion positioned axially adjacent to the flange, and a plurality of finger portions attached to the base portion and distributed in mutually opposing relationship circumferentially about the inner sleeve and extending from adjacent to the base end of the inner sleeve to the distal end of the inner sleeve. The finger portions are movable radially relative to the inner sleeve and have frusto-conical inner surfaces generally conforming to the outer surface of the inner sleeve.

Abstract: A pipe coupling for connecting a pipe (6) to a fitting (5). The coupling comprises an annular assembly (1) incorporating a gripping ring (4) for inserting into a radial gap between the pipe (6) and the fitting (5), and structure (8,9) for applying an axial load to the annular assembly (1) so that the gripping ring (4) is biased radially against the pipe (6). The gripping ring (4) is defined by a plurality of separable segments dimensional such that when the annular assembly (1) is axially compressed each of the segments is biased against the pipe (6).

Abstract: A device for connecting a thin-walled hose (4) pulled into a pipe (2) with a tubular element (6) comprises a sleeve-shaped connector element (8). At one end portion the sleeve-shaped connector element (8) is connectable with the tubular element (6) while the other end portion of the connector element is sealingly connected with the thin-walled hose (4). The sleeve-shaped connector element (8) is connected with the thin-walled hose (4) by means of two annular, concentric sealing elements (14; 16) consisting of highly elastic material between which the wall of the thin-walled hose (4) is positioned.

Abstract: A three-part, re-usable coupling for making a sanitary connection to a flexible hose is disclosed which includes a coupling body of corrosion-resistant material having a central channel for laminar flow. At one end of the central bore, the coupling body is provided with a standard sanitary conduit flange-face. At the other end the coupling body is provided with a notched, substantially cylindrical barb for insertion into the lumen of the flexible hose. An externally threaded section lies between the two ends of the coupling body. A split collar or sleeve which is at least as long as the barb has an externally tapered surface and a cylindrical, internal, threaded surface applies uniform compression to the end-portion of the flexible hose through which the barb is inserted. A nut having an internal taper that matches the external taper of the split collar makes up on the external threads of the coupling body urging the split collar to firmly secure the hose to the barb.

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: A hose end fitting for sealed connection to a hose, comprising: a first cylindrical member having a reduced diameter bore portion and an enlarged diameter bore portion connected to the reduced diameter bore portion; a second cylindrical member axially slidable within the enlarged diameter bore portion of the first cylindrical member and having a radial flange portion and an axial tubular portion extending from the radial flange portion, the radial flange portion being provided with a sealing member, and the axial tubular portion being provided with a sealing member; hose end gripping means provided within the enlarged diameter bore portion of the first cylindrical member and radially expandable and constrictable, the hose being gripped by the hose end gripping means which is radially constricted by axial outward movement of the second cylindrical member; and stopping means received in the enlarged diameter bore portion and adapted to limit axial movement of the second cylindrical member and the hose end gripi

Abstract: A liquid tight connector accepts a non-metallic conduit grasped by fingers on a clip grasping above an annular ring on a ferrule. A compression nut engages the fingers. The configuration enables labor saving insertion and effective liquid tight integrity in an inexpensive device.

Abstract: A fluid coupling for a corrugated pipe, comprising a coupling body having a large-diameter portion and a small-diameter portion through which the corrugated pipe can be passed, metallic seal means arranged at the small-diameter portion, for sealing an end portion of a corrugated pipe pressed against the same, a ring-shaped engaging member disposed in the large-diameter portion and having its inside diameter reducible to a size smaller than the diameter of the top of corrugation of the corrugated pipe, and retaining means having an outside diameter small enough to be inserted into the small-diameter portion, an inside diameter large enough to be penetrated by the corrugated pipe, and a first end portion capable of engaging the engaging member, the retaining means being adapted to press the end portion of the corrugated pipe against the seal means, while transferring the elastic member from the large-diameter portion to the small-diameter portion, thereby holding the engaging member in a predetermined axial pos

Abstract: The invention relates to a pie coupling, including a connection (3), arranged to receive with sliding fit a coupling member (5) which, on forced axial displacement into or in over the connection, is intended to act on clamping and sealing means (6), for translating the compression forces generated by the axial compression into radial compression forces against a pipe or coupling piece (1) inserted into the coupling. The connection may be implemented as a coupling housing (85) having both internal and external threads. Within the threaded area the coupling member may be formed with a cylindrical recess (45) fitting a cylindrical surface (154) provided with an optional type of thread. In accordance with an alternative embodiment, the connection may be equipped with a collar coacting with gripping means (70) equipped with hooks. The clamping and sealing means (6) is retained in the coupling member by coaction between a projection (9) and a locking flange (10).

Abstract: A pressure tank connector apparatus is described, including a fitting body having an integral hollow sleeve portion projecting from one end thereof adapted to extend into an opening in the tank wall and be crimped about an internal flange or lip portion of the tank wall surrounding such opening with a sealing ring of elastomer compressed between a gripping flange portion of the fitting and the tank. As a result, the crimped tank attachment is positioned within the tank so it is protected from vandalism or damage from other causes. The pressure tank connector is coupled by an improved coupling to a flexible conduit such as a hose for supplying compressed air or other gas from the tank to an external device, such as the air brakes of a truck or other vehicle.

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: 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 compression pressure indicator includes a compression member which is disposed within a termination and is constructed such that when exposed to a pressure above a predetermined pressure a portion of the compression member protrudes from the termination thus indicating that optimum pressure has been applied inside the termination. The compression member includes an indicator portion and a collapsible portion, the collapsible portion being shaped such that when exposed to a pressure above the predetermined pressure, the collapsible portion collapses thus allowing relative movement between the indicator portion and pressure extending member such that the indicator portion protrudes a predetermined distance from an end of the pressure exerting member.

Abstract: A connector for engaging non-metallic liquid-tight conduit includes an inner ferrule having a cylindrical portion with an annular rib dimensioned to be inserted into the end of the conduit, and a surrounding sleeve having a conical outer surface and axially extending slots. The sleeve surrounds the conduit and is engaged by a compression nut which radially inwardly decreases the radius of the sleeve, engaging the conduit between the smaller compressed end thereof and the annular rib on the ferrule. The connector also includes a body with threads to engage the nut and the ferrule and body include means for limiting rotational motion of the ferrule.

Abstract: An arrangement for rapid and simple push-in connection of one end of a hose, pipe or similar element. The outer surface of the end is made of a soft material into which at least one retaining device appertaining to the arrangement can be forced to retain the end inside the arrangement. The arrangement comprises an outer part, an insertion part disposed therein which bears the retention devices, and seals disposed in a cavity which can co-act with the external surface of the end. The insertion part has an inherent retaining or locking effect on the pipe or other element and a retaining position wherein it is movable in relation to the outer part. The seals comprise two sealing devices arranged one on either side of a guiding device disposed in the cavity. This guiding device is provided to guide the end while it is being pushed in. After the push-in connection has been made, the guiding element continues to center the end inside the cavity.

Abstract: A coupling unit comprising a first coupling part and a second coupling part. The second coupling part can be displaced longitudinally relative to the first coupling part by means of screw threads or the like. The first coupling part is equipped with a first nut-shaped section and the second coupling part with a second nut-shaped section. The second nut-shaped section has a cross-section measurement which allows passage of the internal surface of a tightening and/or loosening sleeve, when the latter is passed over the second nut-shaped section, to co-act with the first nut-shaped section.

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: The improved fluid conduit assembly of the present invention comprises a conduit plug having an expanded diameter portion and/or narrow portion of reduced diameter, with a fluid passageway extending the length of the plug. The assembly also includes a flexible, resilient, fluid conduit, such as a water hose or drain unclogger having an open end within which the plug is disposed, and a conduit connector connected to the open conduit end by a tubular sleeve disposed over the open conduit end and compressing the conduit end in against the reduced diameter portion of the plug in liquid sealing engagement therewith. In connecting the connector to the conduit, the sleeve is first slid into place and then reduced in diameter, as by crimping, to hold it firmly to the conduit. The resilient nature of the conduit allows it to assume the contour of the outer surface of the plug during the sleeve reducing step.

Abstract: A faucet, such as a mixing valve (32), is connected to plumbing pipes through a fixture (7) adjustably received in a bore (19) of a fitting member (4) mounted in a housing (5). The position adjustable fixture (7) has two longitudinal ducts (28, 30) provided with duct inlets (36, 38) opening into ring grooves (37, 39). Sealing rings (40) on the fixture separate the duct inlets and grooves in pairs for keeping cold and hot water apart upstream of the mixing valve. The duct inlets communicate through ports (45, 47) with chambers (12, 14) in the fitting member. The chambers in turn are connected to the plumbing pipe to provide a separate through flow connection between the pipes and the mixing valve separately for the hot and cold water.

Abstract: A cable fitting which secures and provides strain relief for a cable passing therethrough is capable of use with a wide range of cable diameters. A grommet assembly disposed within the cable body and compressed by a nut has an insert which is removably disposed in the grommet of the grommet assembly and is in an interlocking relationship with the grommet so that the insert does not appreciably move axially with respect to the grommet.

Abstract: The present invention relates to instant fittings for smooth, bare tubes, comprising a hollow body having a bore corresponding to the section of passage of the fluid and an inner housing in which is disposed the tube retaining means, said tube being held by an obturation and abutment means, mounted on the body at one of the ends of the housing on the side of the entry of the tube in the fitting. The housing which presents at least two successive bores encloses a locking element and a tube retaining member generally tubular in form, which are mounted to slide axially in said housing, said retaining member and said locking element comprising click means ensuring a tightening stress of the retaining member on the tube. The invention is used for the connection of tubes.

Abstract: A tubular fitting is threaded at one end for connection to a valve, meter, or the like and at the opposite end to a compression nut. A bore extends through the fitting and includes a tapered or restricted portion. The tapered portion forms an internal shoulder. A compressible sleeve is positioned in the fitting bore opposite the internal shoulder. A reinforcing insert extends through the sleeve. The insert abuts the end of the sleeve. An annular space is provided between the sleeve and the insert for receiving an unthreaded conduit. The insert includes a plurality of annular serrations adapted to frictionally engage the end of the conduit positioned in the annular space. The application of a force on the conduit in a direction to pull the conduit out of the fitting advances the sleeve against the fitting internal shoulder. The sleeve is compressed onto the flexible conduit to increase the frictional engagement of the conduit with the insert serrations.

Abstract: A flexible pipe comprising a first set of stress bearing elements extending substantially the whole length of the pipe, for accommodating maximum hoop stress resulting from flow of pressurized fluid through the pipe, and a second set of stress bearing elements extending substantially the whole length of the pipe for accommodating longitudinal stress resulting from a flow of pressurized fluid through the pipe.

Abstract: A connector assembly (30) attaches a length of flexible well production tubing (22) to a submersible pump (20). The connector assembly (30) includes a tubular housing (38) having a threaded end portion (40) defining a pin for engaging the threaded bore of the pump housing (20). A bore (46) extends axially through the connector housing for receiving an end portion of the flexible well tubing, and a counterbore (48) extends axially through the pin (40) defining a sealing chamber. Flexible strands (36) of the flexible production tubing (22) are wound about a binding element (50) which is lodged within the sealing chamber. A plug assembly (52) applies a compressive force against the binding element and against the flexible strands, thereby establishing a mechanical interconnection tie point between the flexible tubing and the connector housing. A quantity of viscous sealing material (67) is injected into the sealing chamber under pressure.

Abstract: What is disclosed is an improvement in a tubing clamping apparatus in which a hose carrying a fluid is to be connected in fluid tight relationship with an appliance; such as, a welding torch, pressure regulator or the like; the improvement being characterized by a hose barb sealingly connected at one end with the appliance and having an outwardly extending free end having an enlarged inverted frusto-conical section thereon for sealingly receiving the hose inserted thereover, a hose inserted over the hose barb, a thermoplastic clamping means disposed about the hose and encompassing the hose between the clamping means and the hose barb to hold the hose sealingly and frictionally in place, and a retainer means for retaining the clamping means in clamping relationship with the hose and the hose barb; the retaining means being forced toward the appliance so as to apply a radially inwardly biasing force on the clamping means.

Abstract: A hose end construction comprising a hose main body and a connection metal fitting secured to the end portion of said hose main body by means of a clamping ring and a ferrule circumferentially tightening the end portion of said hose main body to said connection metal fitting.

Abstract: Instant fittings for reinforced multilayer flexible tubings for fluids, comprising a body internally provided with a cylindrical inlet whose diameter is substantially equal to that of the tubing, a bead extending radially inwardly and constituting a gripping ridge followed by a generally conical part, a bore whose diameter is equal to the large diameter of the cone, said conical part being internally provided with a channelled bush on which is engaged the end of the tubing 8. The invention is applied to the connection of multilayer pipes.

Abstract: A coupling is provided for the repair of flexible conduit, such as garden hose, comprising a body portion having at least one nipple for insertion into the free end of the flexible conduit. A slotted collapsible collet is radially compressed by a retaining nut thereby clamping the conduit between the nipple and the collet. The collet is generally frustoconical in shape and is reversible for retaining one size of conduit when disposed in a first direction and a larger size conduit when reversed. In order to accommodate a still larger conduit, the collet can be omitted. The body can include a second nipple which can be similarly attached to the free end of a conduit to effect repair of the conduit. Alternatively, the body can include a male or female fitting, a pair of which can be joined to effect repair of a conduit, or used separately in connection with other suitable fittings, as desired.

Abstract: A pipe coupling particularly adapted for use with plastic pipe carrying fluid at high pressure has a body section from which there extend in the axial direction, two concentric sleeve sections with a concentric annular space between them. The end of a pipe to be coupled is fitted over the internal sleeve and an annular wedge is placed in the annular space between the pipe and the external section. A nut having an annular sleeve is threaded to the external section so that the annular nut sleeve enters the annular space and engages the wedge. Torquing of the nut urges the wedge along a camming surface into tight engagement with the pipe, thus deforming it to prevent its withdrawal from the coupling. The tightness of the coupling is enhanced by variation of the diameter of the internal sleeve in the vicinity of the wedge and by ridges on the internal sleeve into which material of the pipe is forced by the wedge to flow.

Abstract: A push-to-connect fitting for sealed connection to a synthetic resin tube end. The fitting includes a body, an eyelet, a nut threadedly connected to the body, and a radially constrictible sleeve for retaining the tube end effectively positively within the fitting. The fitting is arranged to be connected to the tube end by a coaxial insertion of the tube end into the fitting with the tube end being received between the sleeve and the eyelet in moving to the fully inserted position. The sleeve is provided with annular gripping portions, one of which is slidably engaged by the tube end as it is inserted into the fitting. The one tube portion is arranged to be mechanically interlocked with the tube end as a result of an outward movement of the tube end from the fully inserted position whereupon the sleeve is concurrently urged axially outwardly with the tube end.

Abstract: A preassembled tube coupling into which a tube may be inserted and which automatically grips the tube to prevent withdrawal of the tube. The coupling includes a packing ring for sealing the tube, a sleeve with spring fingers to lightly grip the tube upon insertion of the latter, and a nut with a cam surface to contract the fingers into tight gripping engagement with the tube upon slight withdrawal motion of the tube.

Abstract: A pipe coupling is provided having a sleeve with frusto-conical ends, elastomer gaskets fitting in said frusto-conical ends, a follower at each end of the sleeve having a frusto-conical opening, a plurality of generally triangular jaws fitting in said opening, a split, generally cylindrical, ring between the jaws and pipe end engaging both and tightening means acting on each follower.