Abstract: A connecting assembly for connecting a pipe with a connecting element having a conical bore is disclosed. The assembly includes: a longitudinal axis; a pipe having a pipe end configured for insertion in the conical bore; a supporting ring having first and second retaining surfaces; a union nut for screwing on threads of the connecting element and forming a tensioning surface; a cutting ring; and a collar disposed between the first pipe end and the first retaining face. The cutting ring is seated in the conical bore of the supporting ring and provided with a pressure surface for the impingement of force by the tensioning surface of the union nut, and has at least one first cutting edge. A collar bulge is provided on the outer surface face of the pipe can be formed when the first cutting edge cuts into the pipe. The outer diameter of the collar bulge is larger than the smallest support ring internal diameter.

Abstract: A tube coupling for connection to a conduit through which a cable may pass includes a coupling body having an open ended throughway to receive an end of the conduit and a tube locking device in the open end of the throughway for locking the conduit in the coupling body. The throughway has a reduced diameter section with an annular step at an end of the section facing towards the open end of the throughway to receive the end of the conduit inserted into the throughway. An annular flexible sealing member is disposed adjacent the step to be forced by an end of a tube inserted into the throughway into the reduced diameter section of the throughway. Compression of the annular flexible seal forces the seal into sealing engagement with a cable extending along the throughway to provide a seal between the coupling body and cable.

Abstract: A ferrule for a metal tube fitting includes a body that is case hardened over substantially its entire surface. The ferrule also has an interior wall comprising first and second cylindrical portions, the first cylindrical portion being axially adjacent a front edge of the ferrule and having the smallest interior wall diameter of the ferrule, the second cylindrical portion having a larger diameter than said first cylindrical portion.

Abstract: A moisture proof electrical connector assembly for securing an electrical metal tube or conduit to a connector body having opposed end portions and having a bore extending therethrough wherein an end portion includes a first linear length sized and shaped to receive a metal tube or conduit and a second linear length having a diverging inner surface provided with an intermediate shoulder for delineating the first length form the second linear length, and a complementary sealing gland for rendering the entire assembly moisture proof.

Abstract: A fitting for a tube or pipe capable of functioning a high pressures having a first fitting component adapted to receive the conduit end; a conduit gripping device such as a ferrule or ferrules and a second fitting component that can be joined to the first fitting component to cause the conduit gripping device to grip the conduit and seal when assembled. In one aspect of the invention, the first fitting component is constructed from a material that is softer than the material used to construct the second fitting component. An additional aspect of the invention include a retaining portion on the second fitting component that constrains the tube gripping device against pressure. The retaining portion can also be configured to retain the tube gripping device to the second fitting component prior to installation and in a finger-tight condition.

Abstract: The invention relates to a metallic cutting ring for a screw connection for sealingly connecting a tube to an attachment part, which metallic cutting ring has a tube abutment section and a cutting section which adjoins the tube abutment section in the axial direction. The cutting section having a stop which points radially outward from the outer periphery of the cutting ring and has a stop face, which runs transversely with respect to the cutting ring longitudinal axis, for the attachment part. The stop for the attachment part has an annular peripheral stop edge which projects beyond the stop face.

Abstract: A pipe joint restraint (16) includes a pocket (74) having a fulcrum (92) a fixed distance from the centerline (26) of an annular retaining gland (22) and about which a gripping element (76) pivots to move a gripping edge (75) toward the centerline (26) so as to grip a pipe (14) engaged by the gripping element (76) in response to thrust forces on the pipe (14). The length of gripping edge (75) is selected for the material of pipe (14). Adjustable element (78) operatively connects to the gripping element (76) and fulcrum (92) to pivot with the gripping element (76). Adjustable element (78) and may be torqued to a common, predetermined torque whether the pipe (14) is metal or polymeric.

Abstract: A connector is provided for selectively coupling one or more lines or wires (19?, 19?) to a receiving and/or transporting device (27). The connector comprises at least one line or wire receiving ferrule (7) having a plurality of line and/or wire receiving holes (17?-17?) each capable of receiving one of said one or more lines or wires (19?, 19?), wherein said connector further comprises a body (3) for receiving said ferrule (7) and clamping means (9, 11) for exerting a force on said ferrule (7) in order to simultaneously exert a line or wire clamping force on all said line and/or wire receiving holes (17?-17?). In this way all the fluid lines or wires can be clamped at the same time.

Abstract: A high pressure energizable tube connector for a well comprising a tube; a first connector assembly comprising: a female profile disposed over the tube and a first ferrule disposed over the tube adjacent the female profile; a second connector assembly comprising: an inverted jam nut disposed over the tube and a second ferrule disposed over the tube adjacent the inverted jam nut, wherein the second ferrule extends along the tube in a direction opposite the first ferrule; a nipple comprising a test port, wherein the nipple is disposed over the tube between the first ferrule and the second ferrule; a primary seal formed by compressing the first ferrule into the female profile using a pressure from the test port; and a secondary seal formed by compressing the second ferrule into the inverted jam nut using the pressure from the test port.

Abstract: A braze-free connector suitable for use in a refrigeration system that includes a connector body having a circular opening passing therethrough. The opening has a converging section that tapers downwardly from the entrance to the opening toward the back of the opening. A ferrule is slidably mounted upon a refrigerant tube which is inserted into the opening to place a tapered collapsible section of the ferrule in contact with the tapered section of the opening. The non-collapsible section of the ferrule is keyed to a nut which in turn is mated with a male thread formed on the connector body whereby the collapsible section of the ferrule is forced into engagement with the refrigerant tube. A pressure sensitive sealant is pre-coated upon at least the collapsible section of the ferrule which is activated as the ferrule is forced into engagement with the refrigerant tube.

Abstract: A tube fitting that uses only two components, namely a fitting body and a fitting nut. The nut and body are adapted to be threadably coupled together by relative rotation therebetween. The nut includes an integral tube gripping ring that cooperates with a camming surface on the body when the fitting is made-up. The camming surface preferably has a steep camming angle. The ring is radially compressed against the tube outer wall to form a seal and a tight tube grip. The ring also forms a line contact-type seal against the camming surface. The ring is designed to have a hinging action and to plastically deform during pull-up to embed into the tubing for excellent tube grip, and an axially adjacent swage or collet zone that isolates any stress riser resulting from the embedding action from vibration effects. The fitting components, and particularly the ring, may be case hardened. The fitting may include a self-gauging feature to indicate sufficient pull-up and to prevent excessive pull-up.

Abstract: The present invention relates to ferrules for use in fittings of the type that are used for gripping a body, such as a tube end. More particularly, the invention provides ferrules manufactured from hollow stock, such as welded hollow stock and processes for making such ferrules.

Abstract: The invention relates to a pipe connection comprising a metal locking ring (1, 1*), which can be pushed onto the external pipe (6, 6*) of two interlocking metal pipes (6, 6*, 7) to connect the latter. According to the invention, the inner face of the locking ring (1, 1*): a) comprises a leading section (2) that tapers conically in a radial direction in opposition to the direction of application (A); b) comprising a trailing section (4)that tapers conically in a radial direction in opposition to the direction of application (A) and that causes the pipe (6, 6*, 7) to be radially compressed, when the ring is in the locking position; and c) comprises a central section (3, 3*) lying between the leading section (2) and the trailing section (4). The aim of the invention is to further improve a pipe connection of this type so that the tensile strength of heavy duty pipe connections or pipe connections consisting of pipes of material with low elasticity becomes mechanically more stable.

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

Abstract: A pipe joint includes a push ring having a tapered receptacle and fitted to a junction pipe; a pipe joint main body having a pipe receptacle and fitted to the junction pipe; a clamp for moving the push ring toward the joint main body; a packing ring disposed between the pipe joint main body and the junction pipe and fitted into the pipe receptacle; an anti-slip ring disposed between the push ring and the junction pipe and cleaved at one position; an elastic member disposed between the push ring and the packing ring, to press the anti-slip ring toward the tapered receptacle and the junction pipe; and a spacer disposed between the packing ring and the elastic member.

Abstract: A connector is provided for selectively coupling one or more lines or wires (19?, 19?) to a receiving and/or transporting device (27). The connector comprises at least one line or wire receiving ferrule (7) having a plurality of line and/or wire receiving holes (17?-17?) each capable of receiving one of said one or more lines or wires (19?, 19?), wherein said connector further comprises a body (3) for receiving said ferrule (7) and clamping means (9, 11) for exerting a force on said ferrule (7) in order to simultaneously exert a line or wire clamping force on all said line and/or wire receiving holes (17?-17?). In this way all the fluid lines or wires can be clamped at the same time.

Abstract: A sanitary fluid connector system for joining a sanitary fluid system terminated by a first sanitary fluid connector fitting to an industry standard, flanged end, sanitary fluid connector fitting so as to confine fluid contact to the fittings and avoid fluid entrapment in the connector. A tubular connector body is configured to removably secure the first fluid conducting component to the sanitary fluid connector fitting. The connector body is adjustably engaged with the mating end of the first fluid conducting component for setting the depth of engagement. A coupling end of the connector body has an externally operated eccentric cam locking mechanism by which a mating flange on one end of the second sanitary fluid fitting is releasably secured to the mating face of the first sanitary fluid fitting within the connector body, with an industry standard gasket therein between.

Abstract: A coupling assembly for plastic pipes including a nut, a body, a grip-ring, and a seal. The nut can engage the body through appropriate threads and includes a hooked projection having a sloping surface adapted to abut against and provide a force on a corresponding surface of the grip ring within the body. A pipe is inserted through the nut, grip-ring, and seal into the body. Tightening of the nut causes its sloped surface to engage and the grip ring to be forced both radially and longitudinally. Radial compression results in the grip-ring engaging the pipe whilst longitudinal forcing causes it to be forced into the body simultaneously abutting against and compressing the seal whilst dragging the pipe further into the body. The nut and the body may further have tapered surfaces that are brought together as the grip-ring is forced into the body. The physical connection between the body and the nut provides reinforcing for the nut, a feature especially useful when dealing with soft plastics.

Abstract: Tube connectors and tube connector systems are provided. An exemplary system includes a first sleeve, a second sleeve, and radially compressible ring. A tube fits radially inside of the ring and the first and second sleeves. As the first and second sleeves are coupled and brought closer together, inner surfaces of the sleeves exert a radial force onto the ring, causing the ring to radially compress onto the tube.

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

Abstract: Embodiments of a system and method for sealing an end of a flowline to an end fitting are disclosed. Such methods include providing an end fitting housing having a bore, wherein a portion of the bore has a tapered inner surface, inserting an open end of a flexible pipe into the bore, the flexible pipe having an external layer, to create a tapered annular space between the tapered inner surface and the external layer, and positioning a ring into the tapered annular space such that the ring radially contracts upon the external layer causing the external layer to deform to create a seal.

Abstract: A gasket for converting a standard mechanical joint into a restrained mechanical joint without the need for altered configuration of the bell, spigot, or gland of the joint, and without the need for additional fittings or devices. In the practice of the present invention, a standard mechanical joint's bell and gland configuration can be employed to connect a spigot end of one pipe length to the bell end of another pipe length in a restrained relationship, with the restraint based on forces superior to rubber-to-pipe friction. In more particular discussion of the embodiments taught, the invention includes forming the gasket to fit within the bell in such a manner that a void, or gutter, exists during rest, into which void the gasket compresses, which in turn influences the rotational motion of the segment. In this manner, the configuration of the gasket influences the timing and extent of rotation throughout the process of securing the gland to the bell.

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

Abstract: The invention relates to a connecting element for welding onto a circular front face of a pipe, said element having an annular region, (friction region), that can be friction welded to said front face. The connecting element can be welded onto the end of a pipe with a substantially circular front face in a particularly simple, rapid and cost-effective manner. Said element, together with additional components, e.g. a coupling nut and a threaded sleeve enables a tight connection of the pipe to other components, even under extreme pressure and temperature fluctuations.

Abstract: The self energizing tube connector for engaging a pressurizable part made of a tube capable of sustaining pressures up to 50,000 psi without deforming is made of an upstream tube end and a downstream tube end; a ferrule with a front and rear ferrule, a lifting component that engages the front ferrule to cause a upstream seal to form between pressurizable part and tube, and a downstream seal to form between the front ferrule and the tube; and a coupling nut for sliding over the tube and disposed downstream of the rear ferrule for engaging the pressurizable part, wherein the coupling nut is adapted to tighten against the rear ferrule, front ferrule, and lifting mechanism to compress the rear ferrule, front ferrule, and lifting mechanism against the pressurizable part and the tube.

Abstract: The pipe coupling device includes a sleeve having an end adapted for receiving a pipe. The end has a sealing cavity defined between the outer surface of the pipe and the interior surface of the sleeve. A sealing gasket is adapted for arrangement within the sealing cavity of the sleeve for compression into sealing engagement with the pipe. A gripper ring is adapted for encircling the pipe and has a radial inner surface having a plurality of gripping members for gripping the pipe upon coaxial compression of the gripper ring. An intermediate ring is adapted for encircling the pipe between the sealing gasket and the gripper ring, and has a restraining member adapted for restraining the gripper ring to prevent the gripping members from gripping the pipe until after the sealing gasket is compressed into sealing engagement with the pipe.

Abstract: In fittings designed to connect threadless electrical conduits, the improvement of providing raintight fittings, having a hollow cylindrical housing with a bore adapted to receive an end of a conduit to be connected with such a fitting and a compression ring with a solid ring portion assembled on the conduit along with a seal, with the solid ring portion of the compression ring providing a radial surface for advancing the seal along the conduit and to compress the seal radially against the conduit to effect a raintight seal between the housing and such conduit and a compression means which is forced against such conduit by a nut system to lock such conduit in the fitting when the radial face of the compression ring abuts against the housing after compressing the elastomer seal against such conduit.

Abstract: The present invention is a ferrule for gas chromatography fittings comprising a body having a first end, a second end, and an internal bore extending length of the body; a tip integral with the body and protruding from the first end is disclosed. The tip has a flat surface through which the internal bore extends and wherein the flat surface of the tip is of smaller area than the first end and is perpendicular to the body. In one embodiment the body of the ferrule is formed from Zirconia ceramic. A connector assembly for creating a gas seal between chromatographic tubing is also disclosed.

Abstract: A coupling assembly for plastic pipes including a nut, a body, a grip-ring, and a seal. The nut can engage the body through appropriate threads and includes a hooked projection having a sloping surface adapted to abut against and provide a force on a corresponding surface of the grip ring within the body. A pipe is inserted through the nut, grip-ring, and seal into the body. Tightening of the nut causes its sloped surface to engage and the grip ring to be forced both radially and longitudinally. Radial compression results in the grip-ring engaging the pipe whilst longitudinal forcing causes it to be forced into the body simultaneously abutting against and compressing the seal whilst dragging the pipe further into the body. The nut and the body may further have tapered surfaces that are brought together as the grip-ring is forced into the body. The physical connection between the body and the nut provides reinforcing for the nut, a feature especially useful when dealing with soft plastics.

Abstract: A connector adapted for use with an associated fluid line includes a connector body having a passage dimensioned to receive the associated fluid line and a capturing member supported on said connector body. The capturing member is suitable for retaining the associated fluid line in the passage. A sealing member is disposed within the passage and is suitable for forming a fluid-tight seal between the connector body and the associated fluid line. A stiffening member is disposed within the connector body along the passage, and an indicator is disposed within the connector body and is adapted to indicate that the associated fluid line has been received a predetermined distance into the passage.

Abstract: A high pressure connector capable of operating at pressures of 40,000 psi or higher is provided. This connector can be employed to position a first fluid-bearing conduit that has a proximal end and a distal end to a second fluid-bearing conduit thereby providing fluid communication between the first and second fluid-bearing conduits.

Abstract: Device for axial maintenance of a cylindrical element, wherein the device includes a coupling bushing comprising external threads, first nut strips which extend axially beyond the external threads, and a first internal pressure surface. A covering nut is provided which includes a second internal pressure surface configured to engage and deform ends of the first nut strips radially indwardly and towards the cylindrical element when the cylindrical element is introduced into the coupling bushing and the covering nut. A sleeve is also provided which includes second nut strips and an external diameter which is at most equal to an internal diameter of the coupling bushing, whereby the sleeve, with the second nut strips being introduced first, is adapted to be introduced into the coupling bushing.

Abstract: A fitting for the connection of a tubing end. The fitting includes a body having a bore with an internally-threaded opening which extends to a seating surface, and a front ferrule which is receivable coaxially over the tubing end. An externally-threaded nut is receivable coaxially over the outer diameter of the tubing end to be positionable thereon rearwardly of the front ferrule such that, with the tubing end and front ferrule being inserted through the bore opening, the nut is threadably engageable with the body urging an outer surface of the ferrule into a canning engagement against the body seating surface. The axial length of the seating surface is provided to extend substantially the entire length of the ferrule outer surface so as to constrain the radial outward expansion of the ferrule rearward end.

Abstract: A pipe-coupling device comprises a joint body having an opening with external threads to receive a pipe, a locknut having internal threads engaged with the external threads of the joint body, an annular core member disposed within the locknut, and a plurality of locking members retained in apertures of the core member to be spaced circumferentially apart from each other. Upon tightening rotation of the locknut around the joint body, the internal conical surface of the locknut slidably contacts with the conical surfaces of the locking members so as to press the locking members radially inwardly, to cause the gripping portions of the locking members come into gripping engagement with the outer periphery of the inserted pipe, thereby strongly preventing withdrawal of the pipe from the joint body even when the pipe is made of hard material.

Abstract: A pipe joint for joining a tubular component (1) to a receiving piece (2), the pipe joint comprising a fitting body (3) having a recess (8), a tightening nut (6a) having a first thread (7a), the fitting body having a corresponding thread (4), and a cutting ring (9) being arranged to be pressed between a wedge-like wall portion (10) of the recess, and the tubular component when the tightening nut is tightened. In order that the pipe joint could be tightened to form a leak-proof and strong joint using low torque, which enables the use of small tools applicable in confined spaces, the pipe joint comprises a supplementary nut (6b) having a thread (7c) whose handedness corresponds to that of the first thread (7a) but is smaller, the tightening nut comprising a second thread (7b) corresponding to that of the supplementary nut.

Abstract: An intrinsic gauging device for a ferrule type tube fitting of the type having a coupling nut, a coupling body and at least one ferrule, includes a precisely formed marking that has a predetermined relationship with the coupling nut when the fitting has been initially pulled-up. The marking may be realized as a precision groove or recess machined into a surface. The groove can be made more easily visually perceptible such as by roughening, knurling or coloring the surface. The groove defines an edge at a precise position that corresponds to a predetermined axial displacement of the nut relative to the body for initial pull-up. The marking may also be formed with a precise dimension such as an axial length to provide a second edge that corresponds to a predetermined axial displacement of the nut relative to the body beyond initial pull-up for fitting assemblies that are remade.

Abstract: The present invention relates to a pipe coupling of the type where a pipe is freely insertable into the coupling and where a nut causes engagement of a grip ring and gasket with the pipe to provide a seal between the coupling and the pipe, and where within the coupling there is disposed a stop to indicate to a user inserting the pipe freely that the pipe has been inserted to its required location. The stop is located at a position where there is room beyond the stop for the pipe to move into. Tightening of the nut causes the pipe to move further into the coupling beyond the stop. This solves the problem of the pipe being inserted too deeply into the coupling and being deformed when the nut is tightened further.

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

Abstract: A coupling for connecting one or more pipes or conduits. The coupling includes at least one wedge-shaped gasket extending around the coupling. The wedge-shaped gasket includes an outer sloped or inclined surface, an inner surface, and a pair of opposed ends where one end is higher than the other. In use, a pipe, duct or conduit is inserted over one end portion of the coupling such that as the pipe or conduit is moved or slipped over the wedge-shaped gasket, the gasket compresses and forms a seal between the coupling and a portion of the inner surface of the pipe or conduit.

Abstract: A pipe coupling having a radially deformable housing, wherein a pipe is freely insertable into the housing bore and a nut causes engagement of the grip ring with the pipe. The housing bore including a plurality of outwardly extending projections. The grip ring including a plurality of apertures adapted to receive the housing projections and a plurality of inwardly extending burst hole projections. Tightening of the nut causes the grip ring to be forced both radially and longitudinally, whereby the gripping member substantially restricts longitudinal and rotational movement of the pipe.

Abstract: A tube fitting for a tube end has a female threaded member that cooperates with a male threaded member. The female member includes a tube gripping device in the form of a gripping ring or ferrule that is attached to the female member by a fungible web. Upon a partial pull-up the female engages a camming surface on the male threaded member and breaks off or separates from the female threaded member to become a separate piece so that the fitting then functions as a single ferrule tube fitting. Additional features include a steep camming angle on the camming surface to cause the ferrule to grip the tube end with a bite-type action and to form a primary seal between the camming surface and a front end of the separated ferrule. The ferrule front end, and optionally the entire female threaded member including the initially integral tube gripping device, are hardened to be at least about 3.3 times harder than the material of the tube end.

Abstract: The invention relates to a pipe joint for joining a tubular component (1) to a receiving piece (2), the pipe joint comprising a fining body (3) having a recess (8), a tightening nut (6a) having a first thread (7a), the fitting body having a corresponding thread (4), and a cutting ring (9) being arranged to be pressed between a wedge-like wall portion (10) of the recess, and the tubular component when the tightening nut is tightened.

Abstract: A pipe coupling, wherein a pipe is freely insertable into the coupling and a nut causes engagement of a grip ring and gasket with the pipe to provide a seal between the coupling and the pipe, having a stop disposed therein to indicate to a user that the pipe has been inserted to a first position. Further tightening of the nut causes the pipe to move further into the coupling to a second position beyond the stop.

Abstract: A micromachined coupler for coupling a capillary having a first size to an orifice having a shape and a second size, has a body which has a shape conforming the shape of the cavity into which the body must fit. A through hole is defined through the body. The through hole has a size conforming to the first size of the capillary. The capillary is disposable into the through hole so that the capillary is communicated to the orifice without the first and second sizes necessarily being the same. The cavity and the body have conforming slanting surfaces, and in particular the cavity and the body define truncated pyramidal shapes. The cavity and the body each have a truncated pyramidal shape. The pyramidal shape may be square, triangular, or conical. A method of fabricating the micromachined coupler is achieved either by micromaching or micromolding.

Abstract: A screw connection including a sealing ring, a connecting piece, and a union nut for assembling a tube connector. The sealing ring has a nut side portion with an annular reinforcement on its outer face, a narrow ring portion, a ring surface with transfer elements arranged on its annular face located at the transition between the narrow ring portion and the nut side portion, and at least one cutting edge on its interior surface. The annular face having an inclination between 45° and 90° relative to the longitudinal axis of the tube connection. The connecting piece has an end face located at a first axial end and a conical bore disposed within. When fully assembled, the narrow ring portion is positioned with said conical bore, contacts the connecting piece, and transfers a negative image of the transfer elements on the ring surface onto the connecting piece end face.

Abstract: A compression fitting for sealingly connecting a fluid line to a valve, connector or other fixture. The fitting includes a seat for receiving the end of the fluid tubing. A compression nut coaxially mounted to the tubing threadably engages the fitting to create a compression engagement with the tubing and sealingly connect the fluid line to the fitting for directing fluid flow therethrough. The compression nut includes an inner annular groove for receiving a seal member. The seal member extends into the throughbore of the compression nut to form a secondary seal against the fitting.

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

Abstract: An end fitting in which to receive a flexible pipe end to be joined includes an annular seal unit comprised of a resilient elastomeric composition contained in a tapered rigid housing ring force fit in a tapered recess of a surrounding component so as to engage the outer surface of the received pipe end.

Abstract: The present invention relates to a joint structure between a filtration apparatus and a filtration membrane module, which is characterized in that a cap with a pipe is disposed on at least one end of a filtration membrane module using a cap nut capable of being screwed into a thread groove formed on the outer periphery of the end thereof, said pipe of the cap being inserted into and pressed against one end of a joint capable of controlling connection length at both ends, and a branch pipe of a header pipe of the filtration apparatus being inserted into and pressed against the other end of said joint. According to the present invention, there can be obtained such a joint structure that requires fewer components for connection, has a simple construction at connections, and does not cause any leakage.