Abstract: A gas manifold assembly is disclosed which includes a manifold fitting connected to at least one gas valve. The manifold has an inlet fluid port which branches out into a delivery port. Each delivery port receives a protrusion from each valve which is in turn crimped together to form a collar. A stop offsets the valves from one another to improve manufacturability. One aspect of the invention includes flattening a portion of the protrusion that extends from the valve body in order to engage the fitting which creates an anti-rotation feature once the fitting is crimped. Another aspect of the invention provides seals between the fitting and the valve to increase joint integrity.

Abstract: A pipe lap joint is disclosed with an improved sealing zone structure in the overlap region of the pipes. The sealing zone comprises a slot extending from the end of the outer pipe to an inner end wall of the slot. The joint comprises a band clamp with a clamping band which covers the sealing zone including the inner end of the slot. The slot has a bridge extending between the sidewalls and dividing the slot into an outboard slot segment and an inboard slot segment. The bridge has an axial dimension which is substantially smaller than the axial length of either of the slot segments. When the band clamp is tightened, the sealing zone is collapsed by collapse of the slot and consequent deformation of the bridge such that it obstructs fluid flow between the slot segments.

Abstract: A method is used for interfacing materials of dissimilar thermal expansion in an X-ray tube. Initially, a first joint is identified, which has a first component to be received into a second component. Typically, the first component has a higher coefficient of expansion than the second component, so the purpose of the invention is to reduce the physical expansion of that component in the joint. A plurality of slots is introduced along the approximate axial length of a coupling member at the joint, to achieve the aforementioned purpose. The coupling member is provided between the two components, and has a thermal expansion rate greater than one component and less than the other component.

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 rotary joint comprises: a joint main body constructed of a casing (1) and a housing (3); and, a rotary body (8) inserted in the joint main body and rotatably mounted therein. In the joint: a part of an outer peripheral surface of the rotary body (8) serves as a corresponding inner race of a sliding bearing; and, the sliding bearing rotatably supports the rotary body (8), and constructed of the corresponding inner race (11) and a corresponding outer race (10) incorporated in the housing (3). The sliding bearing (10, 11) may be constructed of: a plurality of units of thin-width sliding bearings; or, a single unit of a thick-width sliding bearing. A pin (12) is pounded into the joint and engaged with both the outer race (10) and the housing (3), whereby the outer race (10) is prevented from rotating in operation.

Abstract: The invention concerns a connector for producing a press connection with at least one pipe, which is pressed tightly against the connector radially by irreversible deformation or by a collar. The invention also concerns a press connection consisting of a connector and connecting pipe. The connector is composed of a basic pipe-shaped body 12, on whose outer periphery there is at least one area 14 against which the pipe 16 is tightly pressed radially. The basic body 12 is made of polyvinylidene fluoride which has a long life and high pressure and temperature resistance.

Abstract: The present invention provides an apparatus for making a tube connection. The apparatus comprises a sleeve having an interior surface adapted for receiving a tube section therein. The sleeve further has an exterior surface having a locking mechanism disposed on an outer portion thereon, such outer portion has a first end and a second end. There is an upwardly inclined surface extending from such second end of such outer portion of the sleeve. Extending inwardly from the upwardly inclined surface is a generally cylindrical sleeve wall that is substantially parallel to a longitudinal axis extending through the sleeve from one end to another. There is further a stop flange disposed on a center portion of such sleeve extending radially outwardly from such center portion of such sleeve, such stop flange is disposed substantially adjacent such generally cylindrical sleeve wall.

Abstract: A heat exchanger has a thin wall with a sleeve fitting operatively connected thereto and an interior bore in the sleeve fitting to receive the end of a tube. The sleeve fitting has an annular shoulder collar formation thereon spaced from the adjacent thin wall which engages an assembled locking ring which is assembled over the sleeve fitting by axial movement along the sleeve fitting. An assembly member applies a force against the locking ring to cause it to slide over the sleeve fitting and radially inwardly constrict the sleeve fitting against the tube thus forming a permanent mechanical seal therebetween while simultaneously, another assembly member supports the sleeve fitting at the shoulder collar to prevent transmission of force from the first assembly member to the thin wall of the heat exchanger.

Abstract: A common rail includes a generally cylindrical peripheral wall having a communication passage extending axially therethrough. At least one branch hole extends through the peripheral wall and is aligned perpendicular to the axis of the common rail. The intersection of the branch hole with the outer surface of the main pipe rail defines an outwardly flared pressure receiving seat for receiving the connection head portion of a branch pipe. A sleeve nipple is welded or brazed to the outer surface of the main pipe rail and surrounds the branch hole. Inner surface regions of the peripheral wall surrounding the branch hole have a compression residual stress imparted thereto. The creation of the compression residual stress may cause a portion of the inner surface of the main pipe rail surrounding the branch hole to assume a non-cylindrical configuration.

Abstract: A clamp arrangement for sealing a lap joint includes first and second reinforcing bars and a ductile band with first and second end portions wrapped around first and second reinforcing bars. A gasket member is positioned between the first and second reinforcing bars. The gasket member includes a deformation opening for allowing the gasket member to conform to a step in a lap joint. The gasket member is constructed and arranged to maintain the first and second reinforcing bars in parallel alignment, when the clamp arrangement is tightened around the step of the lap joint. Methods using these clamp arrangements are provided herein.

Abstract: A high pressure quick connector is disclosed for use in connecting brake lines of a vehicle, particularly to a brake junction for an anti-lock brake system. The connector includes a housing for receiving a tube retainer. The tube retainer has a lower cylindrical portion that is positively attached to enclose a flared end form to provide a fluid seal. Retaining means in the form of a snap ring works in conjunction with a pop top to provide a low force and a positive insertion indicator. The snap ring has ears that are compressed together and inserted up inside a slot in the pop top. Upon installation of the tube retainer and retaining means into a central bore of the housing, an end portion of the housing makes contact with the pop top so that the pop top slides up the tube. As the pop top slides up the tube, the snap ring ears are released from the pop top slot. The snap ring expands upon release into a final latching position with the housing and tube retainer.

Abstract: A metal hose comprises a metal tube having an annularly corrugated wall, a fitting body, an extension that projects from the fitting body, and a sealing member. The fitting body defines a sealing seat for the sealing member. The extension projects from the body about the tube and defines a corrugation positioner distal the fitting body. The extension is deformed to shift the corrugation positioner toward engagement with the tube and resiliently compress the tube corrugations between the positioner and the sealing member. The resiliently compressed corrugations urge the sealing member against the seat for sealing the juncture of the fitting and the tube. In one embodiment a reinforcing shroud surrounds the tube and extends into the fitting. The fitting secures the shroud in place. The corrugation positioner compresses the tube corrugations through the shroud so the shroud is clamped and secured in place by the positioner at a location spaced axially from its end within the fitting.

Abstract: A pipe lap joint is disclosed with an improved sealing zone structure in the overlap region of the pipes. The sealing zone comprises a serpentine slot extending from the end of the outer pipe to an inner end-wall of the slot. The joint comprises a band clamp with a clamping band which covers the sealing zone including the inner end of the slot. One sidewall of the slot defines an inwardly protruding tooth and the other sidewall defines another inwardly protruding tooth with a narrow passage between the teeth which is provided by rounded corners on the teeth. The slot also includes a bulbous end-wall which facilitates uniform collapse of the sealing zone. When the band clamp is tightened, the sealing zone is collapsed such that the two teeth engage each other and seal the serpentine slot against leakage.

Abstract: There are provided a connection structure and process for connecting an eye-joint and a slender metal pipe, which is enabled by making the welding operation completely unnecessary to eliminate the working troubles and a fear of cracking or breakage, as might otherwise be caused by deteriorations in the mechanical properties in the vicinity of the connection end portion, which can use the eye-joint body and the metal pipe, as plated with a corrosion-resistance substance or coated with a resin in advance, to improve the productivity drastically thereby to ensure the connection with neither axial nor circumferential movement, and which can connect a metal pipe, if necessary, as having a diameter larger than the width of the eye-joint body.

Abstract: A preassembled fitting including a body, a nut and a collet positioned within the nut. The nut is threaded on the body a predetermined distanced to allow the installer to snap the corrugated tubing into the nut and engage the collet. The nut is then further tightened to seal the body to the corrugated tubing. A tapered surface on the body engages the cut end of the corrugated tubing and flares the cut end of the corrugated tubing. The fitting will make a metal to metal seal by folding the convolutions of the tubing back against itself creating a double flare.

Abstract: The present invention relates to an improved coupling device for tube and that is configured with a tube and an insert that can be fixedly disposed within the tube. The insert includes at least an enlarged portion that has an annular groove thereof, and a receiving space. The tube is provided with a plurality of through holes at the middle portion or end portions. The insert can be disposed within the tube and the outer of the tube is machined to form an annular recess corresponding to the annular groove in a manner such that the insert is fixedly disposed within the tube. Wherein each of the two tubes is provided with an insert in the position to be connected, and the tubes is arranged side-by-side at the area to be connected. An enclosing element is deployed to the connecting area such that the tubes are fixedly connected.

Abstract: A drain and inspection manhole for liquid conduits, in particular waste water and/or storm water drains, comprises a manhole section which is formed as a composite pipe having a smooth cylindrical internal pipe and a corrugated external pipe. The external pipe is deformed to comprise at least one connecting base with a marginal web. Apertures that are flush with each other are cut into the connecting base and the internal pipe, a connector being inserted in these apertures.

Abstract: A quick-coupling device for a duct for fluid under pressure, in particular for a motor vehicle, the device comprising a metal sleeve (10) having a first end which includes an overmolded sealing lining (18) and is engaged on an enlarged end (24) of the duct (12), and having a second end which includes an overmolded sealing lining (16) for mounting in sealed manner on the end of an endpiece (32) of a circuit for fluid under pressure. The invention is particularly applicable to motor vehicle circuits for air-conditioning, braking, and power-assisted steering.

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.

Abstract: A connection between a fluid line and a connecting element, in which at one end the line has an insertion part, and the connecting element is provided with an bore for accommodating the insertion part of the line, in which the line is provided with a locking shoulder, and in which the connecting element is designed to accommodate a locking element, which locking element when fitted covers the locking shoulder of the line, so that the insertion part of the line is locked in the bore of the connecting element, in which the bore, viewed in the insertion direction of the insertion part has a first part with a first diameter and connecting thereto a second part with a second diameter which is smaller than the first diameter.

Abstract: A quick-connect assembly that includes a hollow tubular fitting having axially spaced ends and an outer surface with at least one circumferential groove or channel. A tubular conduit of plastic-coated electrically conductive composition is received over one end of the fitting and is magnetically deformed so as to extend into the channel on the fitting adjacent to the one fitting end for fastening the conduit to the fitting. A coupling is rotatably mounted on the opposing end of the fitting for fastening the fitting to a mating coupling, and carries an elastomeric seal in sliding engagement with the conduit or the fitting for preventing leakage of fluid through the assembly.

Abstract: Disclosed is a vibration damper with an adjustable damping force and a method of producing the same. The adjustable vibration damper has a container tube to which is connected a shut-off valve arrangement. A damping medium is fed to the shut-off valve arrangement via a high-pressure partial length, an intermediate tube, if required, which is arranged inside the container tube, wherein the container tube and/or the intermediate tube with a cylinder in which a piston slides axially at a piston rod form the high-pressure partial length, and the container tube and/or the cylinder tube has a tube connection piece as a transition of the high-pressure partial length to the shut-off valve arrangement. The tube connection piece in at least one of the tubes forming the transition is constructed as a separate structural component part having a flange which contacts the inner region of the tube and projects through an opening in the tube.

Abstract: A pipe connector comprising a tubular pin member (1) having an outer generally frusto-conical surface and a tubular box member (2) having an inner surface corresponding to the surface of the pin member which overlies the surface of the pin member when the members are fully engaged. The central portions (3a,4a) of the frusto-conical surfaces are provided with complementary inter-engaging formations (5,6) and end portions (3b,3c,4b,4c), which are generally spaced apart, have abutting annular rings (20,21) to transfer hoop stresses caused by a pressure difference across the walls of the connector. Following wear of the connector (1,2) the rib also serves to reduce the material removed from the or each member when it is re-cut.

Abstract: During procedures in which earth layers are drilled and casing tubes are simultaneously inserted into the drilled regions, it is desirable to use casing tubes formed from a plastic material. This is accomplished by utilizing a casing shoe which is formed to provide a firm connection between the casing shoe and the casing tube. The casing shoe has an outer annular part (3) and an inner annular part (8) and corresponding conical sections (6, 11), between which the casing tube can be clamped.

Abstract: A pipe connector clamp 10 for connecting two pipes having smooth ends has a metal jacket 11 comprising a tightening angle 15, 16 at a separation line of the metal jacket 11 disposed along its girth. The tightening angles 15, 16 are supported from below by reinforcement angles 17, 18. A press rivet nut 20 or a press rivet ring 19 hold the tightening angle 15, 16 and the reinforcement angle 17, 18 together by riveting the tightening angle 15, 16 and the reinforcement angle 17, 18 to the press rivet nut 20 or the press rivet ring 19. The riveted mounting of the press rivet nut 20 or the press rivet ring 19 facilitates simplified manufacture of the pipe connector clamp 10.

Abstract: A pipe connector includes a tubular pin member having a generally frusto-conical outer peripheral surface and a tubular box member having a generally frusto-conical inner peripheral surface corresponding to the frusto-conical outer peripheral surface of the pin member and overlies the frusto-conical surface of the pin member when the members are fully engaged together. The members include with inter-engageable annular projections and grooves on the said peripheral surfaces for axially locking the members together when they are fully engaged together, the projections and grooves being spaced apart along the surfaces. Means are provided for supplying hydraulic fluid under pressure between the overlying parts of the surfaces of the members when fully engaged together to expand the box member and/or contract the pin member to bring the projections out of engagement with the corresponding grooves and permit the members to be disengaged.

Abstract: A gas riser apparatus having an O-ring sealing arrangement according to the present invention provides improved sealing between an inner pipe and an outer pipe of the riser apparatus. The riser apparatus includes an inner plastic pipe having one or more grooves for receiving resilient sealing members. A plurality of O-rings are disposed within one annular groove and an outer metal pipe is telescoped over the plastic pipe. An annular crimp extends around the outer metal pipe at a location of the plurality of O-rings and forms a seal between an inner surface of the metal pipe and an exterior of the plastic pipe by compressing the O-rings. This O-ring seal configuration provides substantially improved low temperature sealing.

Abstract: The invention concerns a device adapted to be fixed and sealed to at least one cylindrical member (1, 1'), characterized in that it includes:a first sleeve (2),a second sleeve (3) coaxial with the first sleeve (2) having a greater capacity for deformation than the first sleeve (2) and fixed and sealed to the first sleeve (2) at both ends,at least two cylindrical rings (4, 5) coaxial with the second sleeve (3), pressed against the latter and each fixed by one edge to one end of the second sleeve (3), andmeans (6, 6') for injecting a pressurized fluid between the first sleeve (2) and the second sleeve (3).

Abstract: A pipe connecting assembly and method for joining two lengths of steel pipe in the field without the need for welding the connection includes a pair of tubular members both having cylindrical exterior and interior surfaces that substantially conform to the exterior and interior surfaces of the two lengths of steel pipe. At one end of one of the tubular members a male connector is formed. The male connector has a plurality of annular flat and tapered ridges and flat annular surfaces formed thereon. At one end of the other tubular member a female connector is formed. The female connector has a plurality of flat annular ridges and tapered and flat surfaces formed thereon. In employing the tubular members in connecting the two lengths of steel pipe, the ends of the members opposite the male and female connectors are first welded to opposed ends of the steel pipe.

Abstract: An air pressure actuated stop assembly (50) is disposed in at least one of first and second rotatably engaging housings of a coupling assembly (10), the housings (14) being affixed to ends of respective associated hoses 70) to complete an air passageway (24) therebetween when coupled. Each housing (14) has a portion with an exterior surface adjacent an interior surface of a complementary portion of the other housing (14) and rotatably slidable therealong during coupling and uncoupling of the assembly (10). The stop assembly (50) includes a spring biased pin (52) that moves when actuated by air pressure in the air brake hose (70) to a position to obstruct the path traveled by the portion of the opposite housing (14) in a direction uncoupling the two housings (14) thereby preventing rotational uncoupling of the housings (14) when the air brake system is pressurized. The pin (52) is automatically retracted when the air pressure is released thus permitting the housings (14) to be uncoupled.

Abstract: A segmented coupling for use in coupling lengths of plain ended pipe employs cutter members of high strength steel to perform the required interconnection of the pipes, the cutter members being immovably held in the respective coupling segments and, upon tightening down of the coupling being operative to bite into the exterior surface of the associated pipes.

Abstract: A fluid conduit connecting apparatus allows various final assembly orientations of the fluid supply line (52) to a pump housing (16). The fluid conduit connecting apparatus includes a collar (12) having a first side (22) with teeth (26) and a tube (14) with at least one tooth (60) for orienting the tube (14) relative to the collar and housing when finally installed. The tube (14) further includes at least one retaining barb (82) for positively retaining the tube (14) in a fluid passage (72) of the housing (16).

Abstract: There are provided a connection structure and process for connecting a eye-joint and a slender metal pipe, which is enabled by making the welding operation completely unnecessary to eliminate the working troubles and a fear of cracking or breakage, as might otherwise be caused by deteriorations in the mechanical properties in the vicinity of the connection end portion, which can use the eye-joint body and the metal pipe, as plated with a corrosion-resistance substance or coated with a resin in advance, to improve the productivity drastically thereby to ensure the connection with neither axial nor circumferential movement, and which can connect a metal pipe, if necessary, as having a diameter larger than the width of the eye-joint body.

Abstract: A method for producing a microfluidic coupler includes the step of producing a first mask on a top surface of a wafer. The first mask defines an insertion channel pattern selected to correspond to the cross sectional shape of a capillary. The wafer is etched through the first mask to form an insertion channel. A second mask is produced on a bottom surface of the wafer. The second mask defines a subchannel pattern selected to match the diameter of the bore of the capillary. The wafer is etched through the second mask to form a subchannel connected to the insertion channel. The capillary is inserted into the insertion channel such that the capillary is in fluid communication with the subchannel. In one embodiment, a capillary guide is secured to the wafer to facilitate insertion of the capillary into the insertion channel. The capillary guide has a tapered guide channel aligned with the insertion channel for guiding the capillary into the insertion channel.

Abstract: An adaptor for generally permanent coupling of a lubricant line to a lubricant fitting. The fitting has a base, a neck, a head, a lubricant passage, and a valve member biased toward a closed position. The adaptor comprises a body having a hole extending therethrough and an insert in the hole having a circular head and a thin-walled cylindrical extension extending from the head slidable in the hole. The extension defines a socket for receiving the head of the fitting on application of the body and insert to the fitting. The extension is radially inwardly deformable into interlocking engagement with the fitting. The head of the insert has a pin extending therefrom within the socket in the direction toward an inner end of the hole. The head includes a passage for flow of lubricant therethrough.

Abstract: A seal structure in which a hole (5) is defined by a metal base member (4) as a partition member for partitioning the regions on the opposite sides thereof to a gas tight or liquid tight state and a member passes through the hole (5) and extends therefrom. The member passing through the hole (5) may be an electric conductor (2), a pipe member for flowing gas or liquid, a heat pipe for flowing a heat medium, an optical fiber for transferring an optical signal, or the like, and the structure is arranged such that the member passing through the hole is disposed through a synthetic resin seal member (3) and the hole (5) is sealed based on the confinement effected by the plastic deforming action of the base member (4) and the deforming action of the seal member (3) effected by making use of the elastic plasticity thereof, whereby the structure exhibits an excellent pressure resistive performance and can effectively seal the hole (5).

Abstract: A preformed transition pipe coupling is disclosed for the joining together of a generally cylindrical plastic pipe end to a generally cylindrical metal pipe end. A middle ring is provided and a first end of a length of plastic pipe is inserted into and permanently joined to the first end of the middle ring at the factory. Preferably, the length of plastic pipe is joined by securing the plastic pipe to the middle ring by compressing the plastic pipe end between the middle ring and a compression member and securing it in place by utilizing metal teeth and grooves adjacent the inner periphery or outer periphery surface of the plastic pipe. The second end of a joined plastic length of pipe is heat fused to a plastic pipe in the field. A field installed mechanical coupling is attached to a second end of the middle ring to allow for field connection of the coupling to a metal pipe without welding.

Abstract: For fastening a fluid line 10" which can be inserted into a connection bore 9 with a connection end 10 there is an abutment 11 on the outer diameter in the area of the connection end 10 which, when the plug-type connection is put together, limits the axial movement of the connection end 10, by means of a permanently deformed retaining area 13 of the connection piece 8 outside the abutment 11 at least under partial contraction of the connection bore 9 which forms the retaining element.

Abstract: A threaded flush joint for tubular members, particularly a well casing string joint which includes a pin member and a box member, the pin member having an external torque shoulder and being swaged inwardly on its end from the torque shoulder to its end and having external hook threads on its swaged portion, the box member having internal shoulder and internal hook threads which mate with the external hook threads of said pin member. The load flank of the threads of the joint is provided on a flank having a reverse angle taper of approximately 7.degree..

Abstract: Metal braid reinforced convoluted metal hose assembly is provided where the metal braid is mechanically secured or cinched between an adaptor and or retainer and which demonstrates increased structural integrity in this interface area when compared to hose assemblies employing welded braid-to-adaptor attachments.

Abstract: A thermal sleeve for insertion into a feedwater nozzle bore of a reactor pressure vessel for a nuclear reactor is described. In one embodiment, the sleeve includes a substantially cylindrical main body and a substantially cylindrical interference ring. The interference ring has a first secured end and a second free end. The interference ring is connected at the first secured end to an exterior surface of the substantially cylindrical main body. An interference surface is located at the second free end of the ring. The second free end of the cylindrical interference ring is biased so that when the sleeve is positioned in the nozzle bore, the second free end is biased towards the nozzle bore wall. In one embodiment, the second free end is biased into contact with a surface of an outer sleeve which also is positioned in the nozzle bore. The connector, a nozzle safe end wall, the outer sleeve and the inner sleeve cooperate to define a stagnant water area.

Abstract: A pipe joint unit having key members which are struck to bite the surfaces of the pipes is provided with which the pipes can easily and quickly be joined to the body of the pipe joint unit with small force, without skill and regardless of the person who drive the key member. The pipe joint unit according to the present invention includes a body of the pipe joint unit having through holes each of which faces a portion of an inserted pipe in a direction of a tangent line; and key members to be driven into the through holes, wherein each of the key members has a tapered portion which is brought into contact with the surface of the pipe in an initial stage of a driving operation and which bites the surface of the pipe as the driving operation proceeds, and a secured portion to be secured to the bitten portion.

Abstract: A method of attaching and sealing a fluid conduit to a refrigerant receiver drier of the type formed of an aluminum canister with a welded header in which is formed the inlet and outlet ports. An annular rib is formed in the header about the inlet port. An annular convolution is formed about the conduit to be attached adjacent the end and a resilient seal ring assembled over the tube conduit end and registers against the face or side of the convolution. The end of the tube conduit is then inserted in the port and the annular rib deformed over the convolution to retain the tube conduit in the port and sealed against the seal ring.

Abstract: A housing having a socket surrounded by an annular flange is connected to a tube having a raised annular shoulder. The tube is inserted in the socket, and then the flange is deformed radially inwardly to capture the shoulder in the housing. The flange is also recurved alongside the sidewall of the tube on a side of the shoulder opposite the housing to support the tube against bending. The flange includes an inwardly directed wall having an array of raised features positioned to enhance frictional engagement between the wall and the tube when the raised features are forced against the tube as the flange is deformed. In this way rotation of the tube in the housing is inhibited.

Abstract: An object of the present invention is to provide a tube joint, which is capable of properly limiting the degree of biting a tube. In the tube joint of the present invention, an inner section of a collet is divided into a plurality of engage pieces, each of which has a nail section capable of biting the tube. An inner tapered face section is formed on an inner wall of a joint proper. Diameter of the inner tapered face section is made greater toward an inner part. The inner tapered face section is capable of reducing diameter of the engage pieces when the collet is pulled outward. An elastic ring is capable of moving outward with rising fluid pressure in the joint proper. A tapered ring is capable of bending the engage pieces radially outward when the collet is pushed axially inward and bending the same radially inward when the collet is pulled axially outward.

Abstract: Pipe coupling system and method in which a tapered wall is formed on one of two tubular pipe members for press-fit engagement with a wall of the second pipe member, and the two pipe members are pressed together in an axial direction to bring the tapered wall and the other wall into direct press-fit engagement with each other. The two pipe members can, for example, be a length of copper water pipe and a copper pipe fitting, and in certain disclosed embodiments, the pipe members are drawn together by a tool having axially movable jaws which engage the pipe members and are driven together in the axial direction by an actuator and linkage which move in a perpendicular direction.

Abstract: A fitting includes a stepped passage having a pair of axially spaced apart shoulders, one of which acts as a stop shoulder preventing a bell shaped end of a tube support from being inserted past the stop shoulder, and the other of which has a trepan formed therein which is deformed radially inwardly to wrap around the bell shaped end portion. The trepan has a generally triangular shape cross section including an axial inner wall in alignment with the outer diameter of the stop shoulder and a tapered outer wall intersecting the inner wall at an acute angle. In one form of the invention, the entire outer edge of the trepan is deformed radially inwardly to form an inturned lip that wraps around the bell shaped end portion of the tube support. In another form of the invention, a plurality of circumferentially spaced segments of the outer edge of the trepan are deformed radially inwardly to form individual fingers that wrap around the bell shaped end portion of the tube support.

Abstract: A device for permanent joining of plastic tubes intended for use as covering or lining tubes when drilling holes in the ground including a female portion on a first tube and a male portion interacting therewith on a second tube. The male portion being provided with annular projections and recesses round its outer circumference and the female portion being provided with annular projections and recesses round its inner circumference with the recesses and projections on one tube interengaging with the projections and recesses on the other tube in such a fashion that at least one of the tubes is radially deformed and the joint can withstand axial and torsional forces.

Abstract: A coupling in which work for fixing an inner pipe is facilitated, and in which airtightness is maintained such that oil leaks do not occur. A fixing member is fixed to a through-hole formed in an interior portion of an outer pipe. The inner pipe is supported by the fixing member. When a press-fit portion of the fixing member is press-fit into the through-hole, due to a taper surface, an axial center of the inner pipe is aligned with a center of the through-hole, and the press-fit portion fits tightly to an inner peripheral wall of the through-hole while plastically deforming the inner peripheral wall. A portion of the inner peripheral wall of the through-hole, which portion is plastically deformed by the press-fit portion, enters into an annular groove. A seat surface portion abuts and fits tightly to a surface at a peripheral edge of the through-hole. Due to the fixing member, the through-hole is in a completely airtight state.

Abstract: For the purpose of decreasing the tightening torque necessary for a fastening nut in use for conduit coupling, the coupling assembly comprises a gripping member 40 formed as a conical spring member having a central opening formed as a waved circle, a plurality of gripping tabs formed away from each other by an equal angle such as 60.degree. along the inner periphery of the opening, each of the tabs formed as a curve having a curvature convex toward the center of the gripping member, and an end edge 44 of each tab in engagement with the periphery of a conduit with a minimum contact area therebetween.