Abstract: A plug-in coupling having a base body (6), a sealing ring (12, 13), a locking ring (40) and an annular body which can be connected to the base body (6). A pipe end (4, 5) can be locked in position by the locking ring (40). The plug-in coupling of the invention enables a connection to be made with at least one pipe end in a simple, functionally reliable manner, in such a way that pipes made of different materials can be used together. The pipe ends (4, 5) can be inserted into an axial annular gap or space (27) between the base body (6) and the annular body (18, 19) in such a way that the sealing ring (12) lies adjacent the interior of the pipe end (4, 5), making a good seal with the pipe end, and also in such a way that the locking ring (40) is located in the annular gap (27). The locking ring (40) is prestressed and adjoins the locking surface (20) of the annular body (18) on one side and the exterior surface of the inserted pipe end (4, 5) on the other side.

Abstract: The invention concerns a threaded joint to be expanded, comprising a lip (5) at the end of the male element (1) and a housing for said lip on the female element (2) to make the threaded joint capable of being sealed and of having a maximum internal passage cross-section after being subjected to diametral expansion by more than 10%, the free male end surface (9) is socketed before expansion into a partially transverse shoulder surface (10) of the female housing through the matching rebating shapes of said surfaces and the male lip (5) outer peripheral surface (7) is arranged with little play of the internal peripheral surface (8) of the female housing (6). Such a threaded joint is particularly useful for casings and tubings used in oil wells.

Abstract: An adjustable pipe connector for joining ends of lined pipe where corrosive or erosive gases, fluids or slurries may flow to provide a continuous corrosion barrier between the ends of adjacent pipe liners. The connector provides a telescoping arrangement of sleeves that may be adjusted in length to meet the needs of the pipes being welded. The connector also provides heat shielded weld points for welding to the pipe ends to ensure that the integrity of the pipe coatings is maintained.

Abstract: A pipe element possessing a longitudinal axis (2) along which a rigid tubular part (3) and a flexible tubular part (4), together constituting a single piece, extend. The rigid part (3) has one end presenting a substantially radial connection surface (8) for connection to an end portion (11) of the flexible part (4), and an additional connection surface (10) on the radial connection surface (8) connecting to the end portion (11) of the flexible part (4), at least a part of the additional connection surface (10) extending substantially parallel to the longitudinal axis (2).

Abstract: A gas line mounting assembly includes a bracket which is adapted for being secured to a cabinet of an appliance and a gas inlet fitting attached to the bracket. The fitting has a generally rectangular body disposed within a generally rectangular aperture in the bracket. The enlargement between the rectangular body and the rectangular aperture prevent rotation of the fitting with respect to the bracket. The bracket has a tab which is plastically deformed into a groove of the rectangular body to prevent longitudinal movement of the fitting with respect to the bracket.

Abstract: A solid plate of material has an outer side and an inner side. A hole is disposed in and through the solid plate, the hole being capable of receiving from the outer side one end of an exhaust pipe. The inner side of the solid plate has a collar capable of being received within an annular edge of a catalytic converter housing. The outer and inner sides of the end plate have an area outside the circumference of the catalytic converter housing that contains at least one hole capable of receiving a bolt or other fastening mechanism.

Abstract: A press-fitting connector for plastic composite pipes, comprised of an inner plastic layer, an outer plastic layer, and a middle metal layer, has a support member receiving the end of a plastic composite pipe. The support member has an outer collar having a first end face facing the plastic composite pipe and a second end face facing away from the plastic composite pipe. An insulating plastic ring is positioned at the first end face. A press-fit sleeve secures the pipe end on the support member. The outer collar has two diametrically opposed cutouts. The insulating plastic ring is a curved spring washer with two convexly curved and two concavely curved portions, wherein the convexly curved portions have monolithic, axis-parallel tongues engaging the cutouts of the circumferential rib. The axis-parallel tongues in the end position of the plastic composite pipe project partially from the cutouts past the second end face of the outer collar.

Abstract: An insert section of an insert member is inserted into a tube member in a state in which the insert member is detached from a recess to form a diametrally expanded section on the tube member. Subsequently, the insert member is fitted to the recess to install the tube member to the recess. At this stage, an outer circumferential surface of an expanded section of the insert member tightly contacts with an inner circumferential surface of the recess to effect the sealing function. Subsequently, a tapered section and an outer circumferential surface of the tube member are resin-welded by using a welding material. Thus, the tube member is prevented from disengagement from a body.

Abstract: A resin pipe joint comprising a tapered flare portion (10a) formed on a pipe (10), an inclined portion (11a) formed internally of a joint body (11), an annular member (12) having inner peripheral surface fitted on the pipe (10) and the outer peripheral surface inserted in the joint body and formed at the end with a tapered chamfered portion (12a), and a pipe clamping member (13) threadedly fitted to the joint body (11). The pipe clamping member (13) being threadedly fitted to the joint body causes the chamfered portion (12a) of the annular member to pressure-contact the flare portion (10a) of the pipe and the flare portion of the pipe to pressure-contact the inclined portion in the interior of the joint body, whereby the clamping force can be concentrated on the flare portion of the pipe, so that a high sealing capability between the pipe and the joint body is obtained.

Abstract: When an insert member is inserted into a fluid passage of a fluid tube, the fluid tube is diametrically enlarged by a tapered section. When a female thread of a nut member is meshed with a male thread of a main body section, first and second edge sections are engaged so that they bite into the outer circumference of the fluid tube diametrally enlarged by the tapered section. Accordingly, various fluid tubes, which are identical in outer diameter size but which are slightly different in wall thickness, are reliably prevented from disengagement from a tube joint.

Abstract: A joint between the ends of two flexible ventilating ducts (10A, 10B), an end (11) of one of the ducts (10A) having a stiffening ring (13) and being telescoped over the other duct (10B), and an outer capping (14) connected to the other duct (10B) enclosing the joint between the telescoped ducts.

Abstract: A system and method for installing plumbing spouts, such as shower heads and tub spouts, includes providing a stub out which protrudes out of a wall at shower height. A specialized adapter is then slid onto the protruding stub out until the adapter abuts the wall. The adapter is internally threaded with an integral ferrule, and may also be equipped with a one-way gripper ring and an O-ring to sealingly secure the spout to the stub out. The stub out, if closed, is then cut off outside the adapter and a standard shower arm or nipple for a tub spout is threaded into the adapter. A threaded end of the shower arm or nipple engages the ferrule and compresses it against the stub out creating a seal therebetween. When installing a shower head, an escutcheon plate is adapted to be slid over the shower arm to engage peripheral fingers of the adapter to secure the escutcheon in place. A shower head is then threaded onto the shower arm to complete the installation.

Abstract: A fitting for conduit comprising a body and an acceptor. The body has a wall and a throughbore. The acceptor is disposed along the wall and is capable of providing a sealing interface between the throughbore and the conduit. In one embodiment, the acceptor of the fitting receives a portion of at least one wall of a conduit, and a sealing interface is provided between the throughbore of the body of the fitting and a flow passage of the conduit to form a containment system. In another embodiment, the throughbore is capable of allowing a primary conduit and a flow passage of a secondary conduit to communicate therethrough. According to this embodiment, the acceptor receives a portion of a wall of the secondary conduit and a sealing interface is provide between the throughbore and the flow passage of the secondary conduit to form a secondary containment system.

Abstract: The present invention relates to a method of constructing a tube joint wherewith one end T1 of a tubing T is heated to be softened; the softened end T1 of the tubing T is inserted into a drop-off prevention ring 30; the end T1 of the tubing T is upset by means of an upsetting core 50 such that the anchoring portion 35 of the drop-off prevention ring 30 bites into the softened end T1 of the tubing T; and the end T1 of the tubing T is cooled to be hardened with the anchoring portion 35 of the drop-off prevention ring 30 being kept biting into it, and to such tube joint.

Abstract: A hollow fiberglass utility pole includes a pair of segments that are a fiberglass sheet that has a semicircular cross-section. The segments have first and second longitudinal edges with male and female couplers respective shapes that have a complimentary relationship to each other for mechanical engagement thereof. The fiberglass pole is assembled by engaging the first longitudinal edge of one segment with the second longitudinal edge of the other segment at an installation site. The fiberglass pole may be used as a sheath to encase an existing wooden pole.

Abstract: A coupling device for joining pipe ends has at least one pressing sleeve which can be slipped on a pipe end and pressed together with the pipe end. The pressing sleeve is elastically designed in the area of its inner surface pressed on the pipe end so that an expansion of the pipe end caused by temperature variations can be absorbed by elastic shear deformation of the elastic area, without causing the pipe end to slide in the pressing sleeve.

Abstract: A synthetic resin-made fastening-limiting device employed for limiting a fastening force of a fastening member in case of fastening a connection portion between a pipe receiving port of the joint and a pipe by means of the fastening member. In the fastening-limiting device, an appropriate sealing property of the pipe connection portion and a screw amount of the fastening member required in trying to preventing the pipe from slipping off can be surely determined. Furthermore, the operator can recognize easily the appropriate screw amount of the fastening member by a sound and a touch. This fastening-limiting device has a ring portion fittable onto the pipe receiving port of the joint A and a protrusion disposed on the ring portion. On a side of one end in an axial direction of the ring portion, a first abutting portion is formed. On a side of the other end in an axial direction of the ring portion, a second abutting portion is formed.

Abstract: An improved coupler and method for fusing profile wall thermoplastic pipe in a manner to form a substantially flush joint are disclosed. The improved coupler is preferably configured to be inserted between the inner and outer walls of each of the pipes being joined. The improved coupler preferably has a radial thickness that is less than the radial dimension of the gap or channel that is formed between the inner and outer walls of the pipes being joined and is preferably configured and adapted to have an annular interference fit with one of either the inner or outer walls of such pipe ends. Electrofusion is preferably used to heat-fuse the improved coupler to each of the pipes to create a strong, leak-proof joint between the two pipes.

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

Abstract: At one end of the hose body 55 formed by the thin cylindrical wall, and straight end portion 54 extending straightly and an annular groove 56 integrally mold-formed on an outer peripheral surface of the straight end portion 54 are provided. An connecting member 60 for connecting the one end of the hose body 55 with the mating member has a cylindrical portion 61 secured on an outer peripheral surface of the straight end portion 54 coaxially. When the straight end portion 54 onto which the cylindrical portion 61 is secured is inserted into the straight end portion 54, a first engaging element 60b extending radially outwardly from the cylindrical portion 61 engages with a second engaging element 77 protruded from the opened end portion 76 radially outwardly.

Abstract: A connector for connecting a hose to a fluid handling device having a first bore defining a fluid path and a second bore. The connector comprises a connector housing and a retaining mechanism. The connector housing has a first bore, a second bore and a third bore. The first bore has an entrance and a terminal end. The second bore has an entrance and a terminal end. The third bore has an entrance. The terminal end of the first bore intersects the terminal end of the second bore. The entrance of the first bore communicates with the hose. The entrance of the second bore communicates with the fluid path within the first bore of the fluid handling system. The third bore of the connector housing is parallel to the second bore and the entrance of the third bore of the connector housing is located longitudinally between the entrance of the first bore and the entrance of the second bore. The retaining mechanism retains the connector housing to the fluid handling device.

Abstract: A structure of a fluid passage output port of a fluid-operated apparatus comprises a first valve body composed of a resin material and formed with a fluid passage for allowing a fluid to flow therethrough; and a fluid passage output member formed of a resin material to have a substantially cylindrical configuration separately from the first valve body and screwed into a hole of the first valve body by the aid of a male thread; wherein a primary seal portion which intersects an axis of the fluid passage output member and a secondary seal portion which is substantially parallel to the axis are provided at a connecting portion thereof.

Abstract: A threadless coupling for pressurized systems includes a nut member and a mating member. The nut member has a first axial end for attachment to the pressure sensitive control, a second axial end configured for engagement with the mating member, and a housing extending between the first axial end and the second axial end. The housing is configured for locking engagement with a pair of retaining tabs extending from an outer surface of the mating member. Each mating member retaining tab engages a corresponding seating surface and step surface of the respective housing opening so that relative axial and rotational movement of the nut member and mating member is prevented.

Abstract: The present invention concerns a connector element used to connect lengths of tubing, cannulas and catheters, to a second connector element. The connector element has a conduit for conveying a flowing medium, a shut-off element by which the conduit can be sealed off, and an portion for accommodating a puncture element movable relative to the shut-off element, which is designed to open the shut-off element when the connection is established. The connector element is simple to manufacture and ensures a reliable connection, because the shut-off element is of the same material and is integral with the connector element.

Abstract: An improved tubing adapter or coupling apparatus, and combination of same with other fittings, is characterized by an adapter member having a first end including at least one exterior barb for engagement with tubing and a sleeve member operatively positioned around the adapter. In some systems, the tubing or hose may include a fitting at its other extremity, such as a hose end, an ell, or another coupling. The sleeve member of the coupling apparatus preferably includes one or more view ports. The ports can enable the user to visually confirm the tubing has been properly and completely assembled onto the adapter member, and, following initial assembly, to visually ascertain the position of the tubing on the adapter. The apparatus also preferably includes corresponding engagement detents on the adapter and sleeve member, for initial engagement of the retaining member with the adapter member prior to assembly with tubing.

Abstract: Conduit coupling apparatus has a first conduit with an annular gasket in an outlet portion to receive a second conduit member sealingly and rotatably to retain the lugs on one member engaging flange portions on the other. Lateral conduits are securable about the outlet of the first member by flange portions secured by threaded fasteners, and quick-connect fittings are utilized.

Abstract: In order to minimize opportunities for dirt, grime, moisture and adverse atmospheric conditions to enter a fitting for coupling a flexible plastic tubes in a quick connect-type coupling, a collet used within the coupling has a constant diameter boss at one end and slots splitting the collet into spring fingers, which slots do not extend into the boss. The collet is received within a bore in an annular body, wherein the bore includes a cylindrical surface that is substantially completely engaged by an outer cylindrical surface of the boss, with the end of the boss projecting from the body a substantial distance beyond the bore.

Abstract: A device and system for securing adjacent segments of duct work formed from fibrous glass duct board insulation and the like is disclosed. The device comprises a corner member having two legs disposed at approximately right angles, each of said legs having oppositely facing and substantially parallel adjacent channels disposed therein to accommodate portions of opposed edges of adjacent segments of duct work. The system includes a plurality of corner members each having two legs disposed at approximately right angles, said legs having substantially parallel and oppositely facing adjacent channels disposed therein to accommodate at least a portion of the opposed edges of adjacent segments of duct work.

Abstract: A joint between a fluid connector body and a plastic tube is formed at least in part by spin welding, wherein the portion of the connector which is configured to receive the tube defines inner and outer surfaces which engage the inner and outer surfaces of the mating tube to create redundant circumferentially continuous seals between the fluid passageway and the outside environment. The use of multi-layer co-extruded plastic tubing having intermediate or bonding layers is particularly advantageous inasmuch as separate inner and outer seals are established between the connector housing and the inner and outer tubing layers, respectively, to ensure that neither system fluids nor foreign contaminants are exposed to the intermediate tube layers, thereby preventing capillary adsorption or delamination.

Abstract: A tube connecting structure for connecting a resin tube and a tubular mating member. The structure includes an engagement member having a cylindrical base that is attached onto the outer peripheral surface of an end portion of the resin tube and is fixed to the resin tube by a cylindrical press-fitted member. The cylindrical press-fitted member is press-fitted into the inner peripheral surface of the end portion, thereby expanding the diameter of the end portion of the resin tube and fixing the cylindrical base to the resin tube. The engagement member has a plurality of arm portions radially extending from the cylindrical base. First engagement portions, in the form of ratchets, are provided to protrude from tip end portions of the arm portions, such that the first engagement portions can be snap-engaged with a second engagement portion on the tubular mating member. The tubular mating member and the resin tube are directly connected to each other with a ring-shaped elastic seal member positioned therebetween.

Abstract: A plastic duct section is equipped with integral connections on its ends. Each duct has indicia along its running length to facilitate cutting of the duct to a desired length. In one embodiment, the indicia may take the form of equally spaced circumferential ribs spaced along the length of the duct. These ribs are engaged by sets of fingers extending toward each other from concentric walls spaced to receive the straight end of an adjacent duct section. The innermost end of the concentric walls is equipped with a layer of insulative material to enable sealing engagement between duct sections significantly reducing pressure loss. Attached straps permit duct sections to be easily suspended between adjacent joists. A floor-mounted elbow boot is equipped with a removable plastic cover to prevent dust, dirt and debris from accumulating in the installed heating duct during finish construction of the building.

Abstract: A coupling interconnects either of two conventional types of waste water outlets used to discharge waste water from a waste water holding tank of a recreational vehicle with a discharge hose to convey the waste water to a remote location. A sleeve of the coupling penetrably engages an internal cylindrical surface in either outlet and is of a common diameter to concentrically locate the coupling irrespective of differences in the external size of the outlets. A pair of hooks extend from the coupling to engage dogs extending radially from either engaged outlet to retain the coupling in place. A seal seals the junction between the coupling and the outlet to prevent leakage of waste water therebetween. The discharge hose is connectable in fluid communication with the sleeve to convey the waste water from the coupling.

Abstract: A bubble jet fitting for use in a pool or spa provides for a lay-length short enough to allow its installation within a six-inch dam wall. The bubble jet fitting has an outlet portion which in one use provides for solvent welding therein of either one of two different standard sizes of PVC pipe. An axially extending annular recess of the fitting may receive a surfacing layer of plaster or fiberglass to form a water-tight interface with the surrounding wall of the pool or spa.

Abstract: The present invention relates to a fastening-limiting device for a fastening member which fastens a pipe inserted into a pipe receiving port on the side of a joint. The fastening-limiting device has a ring portion which is fittable onto the outside of the pipe receiving port. A beam portion is formed on the ring portion. A protrusion is formed on the beam portion. A first abutting portion which is to abut against a reference face on the side of the joint is formed on one end of the ring portion. A second abutting portion which is to abut against a confronting portion of the fastening member is formed on the other end of the ring portion. A gap between the first and second abutting portions and is equal to the gap between the reference face and the confronting portion at the time when the fastening member exerts a sealing property and a function of preventing slipping-off.

Abstract: An inventive air duct includes a blow molded tubular body of a first material having at least one annular open end, the open end terminating at a radially outwardly extending lip. A cuff of a second material is molded to the main body such that at least a portion of the lip is embedded within the cuff. Before molding the cuff, a portion of the main body adjacent the open end is pre-formed to remove any seams created during blow molding and to provide improved dimensional stability. Thus, leak pathways are minimized. The improved dimensional stability in combination with the use of an outwardly extending lip, a portion of which is embedded within the cuff, helps promote a strong seal between the cuff and the main body.

Abstract: The assembly of a connection that uses cooperating grooved surfaces to provide an easily disassembled and assembled connection is improved by the use of a centered lip and cooperating groove on the contact faces of the connection halves that engage the faces of complementary connection ends to prevent lateral misalignment while the pipe ends are brought together for axial alignment. The lip extends into the groove to trap a gasket retained within the groove and inhibit extrusion of the gasket between the contact faces under high pressure conditions. The centering device may be used with a clamping mechanism to provide single person assembly of this type of connection despite normal field misalignments. The trapping cavity formed by the faces of the connection ends particularly enhances the pressure capacity of elastomeric gasket applications.

Abstract: A connector for connecting large tubes of the type used in oil well tubing, casing and the like, without resorting to welding, to form a pipe string for use in drilling. The connector comprises a pin and box threaded connection having guiding surfaces integral with the pin and box members to facilitate the threaded connection of large tubes. The connection is designed so that large tubes, for example tubes comprising an external diameter of two or more feet, may be joined by threaded connection facilitated by the integral guiding surfaces of the pin and box threaded members. The integral guiding surfaces allow large tubes, which are otherwise too cumbersome to position and manipulate for threaded connection to be practical, to be quickly and safely connected by threaded engagement of the pin and box members without the use of a weld between the tubes.

Abstract: A joint coupling is disclosed for connecting sections of conduit. The present joint coupling includes a male connector portion having an inner side and an outer side, having a barb on one or both of the sides. A gasket is received on the male connector portion, and has one or more fins on the side opposite the barb. A female connector portion receives and engages the male connector portion and includes a first side having a lock down lip for engaging the barb and a second side for contacting the gasket fins. The fins bias the connector portions in an interference to create a transverse locking force that securely retains the connector portions. The connector portions can be formed directly on the sections of conduit, or can be formed on a discrete conduit cap or an intermediate coupler, for joining sections of conduit.

Abstract: A quick connection and disconnection device for the electrical pumps and tubes of automobile vehicle wind screen washer installations, comprising a nozzle body and a connecting body each having an axial passage and arranged coaxially relative to one another, the nozzle body and the connecting body being slidable longitudinally in both directions relative to one another so that the connecting body has a first working position or disconnection position in which at least one end of a flexible tube passing through the axial passage of the connecting body fits into the axial passage of the nozzle body, and a second working position or a connection position in which the one end of the flexible tube is attached securely to the nozzle body, the nozzle body being provided on an exterior with a connection groove and a disconnection groove which are separated by a wall of a convex-curved outline, the connecting body at one end being provided with a plurality of longitudinal grooves which starting from an edge of the one

Abstract: The present invention relates to a pipe joint made of resin used for laying pipes in which a high-purity liquid, ultra pure water or the like flow. According to the pipe joint of the present invention, a sealing surface pressure is generated in both axial and radial directions, providing thereby an excellent sealing property for a long period, and facilitate controlling a torque for fastening a pushing ring. The pipe joint made of resin according to the present invention comprises a joint body having a receiving port, a cylindrical portion, an annular groove portion and a stepped surface. An inner ring forcedly inserted by the pushing ring is provided with an outer projection, an inner projection and an annular recessed portion. On at least one portion among axially opposed portions of each surface, an axial sealing portion is disposed. On at least one portion among radially opposed portions of each surface, an radial sealing portion is disposed.

Abstract: A hydraulic coupling having a lower tubular member and an upper tubular member for sealing engagement one with the other. The lower and upper members are maintained in axial engagement by an axial load. The lower member and the upper member each have an annular body having an axial bore therethrough for the passage of fluid. A metal, concentric inner annular seal leg and outer annular alignment leg extend from the body of the upper member, defining an annular sealing recess between the seal legs. An annular metal sealing portion or wall extends from the body of the lower member and has an inner diameter that defines a sealing surface for insertion into the sealing recess for sealingly engaging the inner annular seal leg. The sealing recess has a backup elastomer ring, which is axially compressed by the sealing portion. When the couplers are made up, the metal-to-metal seal is achieved due to an interference fit between the coupler halves.

Abstract: A dual seal is provided for establishing fluid tight engagement between conduits subjected to both internal and external pressure. The dual seal comprises four seal portions disposed between an inner and an outer cylindrical surface.

Abstract: A connector for coupling a tube to an annular boss of a vessel wall, the annular boss having a wall with an inner surface. The connector includes a coupling body having first and second end portions with a throughway extending between the first and second end portions. The first end portion is adapted to receive and retain the tube. The second end portion includes an encircling seal and a grab ring to engage and retain the second end portion in the annular boss. The coupling body includes a sleeve encircling the second end portion, and an annular gap located between the sleeve and the second end portion for insertion of the wall of the annular boss into the annular gap to engage the seal and the grab ring, so that the sleeve supports the wall of the annular boss.

Abstract: The assembly of a connection that uses cooperating grooved surfaces to provide an easily disassembled and assembled connection is improved by the use of a centering surface and cooperating lip that engages the faces of the connection end to prevent lateral misalignment while the pipe ends are brought together for axial alignment. The centering device may be used with a clamping mechanism to provide single person assembly of this type of connection despite normal field misalignments. The centering surface in the face of the connection ends may use any type of gasketing surface to provide the desired amount of seal strength.

Abstract: A drill string includes a plurality of tubular members each having a connection with a pin connector and a box connector on adjacent tubular members. The pin connector has an external thread adapted for threadingly engaging an internal thread on the box connector of the adjacent tubular member. The pin connector has an outer groove for receiving a protuberance on the terminal end of the box member. The protuberance and groove have contoured surfaces providing large metal-to-metal contact for preventing the contoured surfaces from sliding during over-torquing and cyclic bending of the drill string.

Abstract: The present invention relates to a pipe joint made of resin used for laying pipes in which a high-purity liquid, ultra pure water, a medical liquid or the like flow treated in production process in various on a side of an inner periphery thereof kinds technical fields such as production of semiconductor, medical supplies and medicines, food process, and chemical industry.

Abstract: A joint for coupling tubes forming a large diameter portion near one end of a fluorocarbon resin tube and forming a fastened portion by clamping at a crimp portion of the large diameter portion with a cap nut includes of a main body of rigid resin joint having a cylindrical portion formed a ring-shaped groove and cut a bevel at its inner wall end and a hard cap nut having a inner shoulder formed an acute-angle hook. The major portion of the large diameter portion of the fluorocarbon resin tube is inserted into the ring-shaped groove. A tube clamp portion as a hermetic portion is formed to press hard a tube crimp portion against the inner wall end of the cylindrical portion with the inner shoulder of the hard cap nut by tightening the hard cap nut on an external thread of the outer wall of the cylindrical portion.

Abstract: In a windshield wiper apparatus, the feed line is conducted to a washing nozzle by way of the drive axis of the windshield wiper arm. The feed line consists of a metallic tubelet, which is conducted through the axis, which is constructed in a hollow manner. The end of the tubelet is sealed by means of a sealing part, whereby the sealing part supports a nozzle body. In order for the sealing part of the tubelet to be securely sealed, it is provided that it has a central guide peg which is coaxially encircled by a stud, so that an annular groove, into which the casing of the tubelet is inserted, is constructed between the guide peg and the stud.

Abstract: A quick-connect coupling for interconnecting only matching fluid delivery and supply lines while preventing the inadvertent connection of mismatched lines where there are matched and mismatched delivery and supply lines. The coupling includes first and second coupling members that are releasably slidably, axially interfitted with their passageways in fluid communication. In the disclosed embodiment of a coupling for use in a chemical extraction system, one coupling member is a male member connected to the supply lines in the typical fifty gallon drum and the other coupling member is a female coupling member connected to the delivery lines. Key coding elements on the coupling members are movable into matched interengagement when the supply and delivery lines are matched but are precluded from moving into matched interengagement when the lines are mismatched.

Abstract: A coupling system comprises a first coupling member having a tongue that projects axially a distance therefrom, and a second coupling member that is threadable attached to the first coupling member. The tongue is inserted within a groove disposed within a second coupling member body. The tongue is axially displaced within the groove by rotation of one of the first or second coupling member relative to the non-rotated coupling member to form a leak-tight seal therebetween. At least one of the first or second coupling member body includes a hollow passage that extends axially therethrough. An elastomeric member is disposed within the groove and is interposed between a base portion of the groove and an end portion of the tongue.