Abstract: A deformable bushing to seal tubing to a receiving body is provided. The bushing includes a pair of grooves extending around the bushing with an annular ring between the grooves. The grooves are cut to a depth leaving sufficient wall thickness, and have an inscribed angle of about 90 degrees. An alignment flange may be provided at one end of the bushing to align the axis of the tubing with the axis of the through-hole in the receiving body.

Abstract: The invention concerns a device for axially retaining a cylindrical element and more particularly a cable (1) comprising a socket (7, 9) with an external thread and extended in the axial direction by clamping plates (9), and an overlapping nut (6) comprising internally a shrunk pressure surface (11) designed to act on the ends of the clamping plates (9) of the socket and radially deform them towards the cylindrical element (1) previously inserted into said socket after passing through said not (6). Said device is in particular characterised in that it further comprises a sleeve (8, 10) likewise provided with clamping plates (10) and whereof the external diameter is not larger than the internal diameter of the socket wherein said sleeve is designed to be inserted starting with said plates (10) with which it is provided, said socket being further internally provided with a shrunk pressure surface (12), designed to act on the sleeve clamping plates (10). In one embodiment, a packing seal is further provided.

Abstract: A connector (10) for sealing an elongated tube (14) to a body (22) comprises a nut (12) concentrically about the tube (14) proximate the flared end (16). The nut (12) has a threaded exterior portion (34) and an abutting face (42) proximate to and concentric with the exterior face (32) of the flared end (16). A non-linear spring (44) between the exterior face (32) of the flared end (16) and the abutting face(42) of the nut (12), and is displaced upon tightening of the nut (12) to the body (22) to generate a substantially constant restorative force over a portion of the displacement to urge the interior face (30) of the flared end (16) into sealing engagement with and against the shoulder (38) of the body (22).

Abstract: A connector is provided for removably attaching a space frame to the hull of a floating offshore platform. The connector comprises a socket attached to the hull of the platform. The socket has an open bore therein. A stabbing member is attached to the space frame. The stabbing member has a lower end insertable into the socket. An expandable locking ring is carried by the lower end of the stabbing member. The locking ring comprises a plurality of ring segments for removably seating within the socket bore. A backup ring is slidable along the stabbing member. The backup ring removably mates to the locking ring.

Abstract: The invention relates to a screw connection comprising 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 connection device for making a tight connection between two ends of tubes is provided. The connection device includes a body having two symmetrical and opposite portions for engaging ends of respective tubes, and each of the portions has a hooking element to keep the tube in the connection, and a sealing element for the connection. The hooking element of each portion includes: a truncated chamber arranged in each portion; a longitudinal rib projecting into the truncated chamber; and a split ring whose ends are located on either side of the longitudinal rib. The ring is provided with an internal threading, so as to cause a blocking of the tube by any traction on the tube in a direction opposite to its direction of engagement. The ring is placed free in the truncated chamber, on one hand, and is elastically deformable, on the other.

Abstract: The present invention is a universal self-adjusting high pressure liquid connector for use with high pressure liquid chromatography (HPLC) columns requiring liquid-tight and leak free seals between fittings and unions. The present apparatus provides a liquid-tight seal between the end of a HPLC end fitting and a end cap thereby eliminating any potential dead volume in the area of the connection. The apparatus comprises a body, a fixed ferrule, a replaceable ferrule, a stem disposed in the body and a biasing spring slidingly mounted on a capillary tube of that extends through the connector. The spring biases the capillary tube of the connector into the HPLC end fitting, self-adjusting and maintaining a pressure sufficient to ensure a liquid-tight seal notwithstanding the depth of the HPLC tube stop or ferrule stop of the mating HPLC column.

Abstract: The invention is a micromachined coupler for coupling a capillary having a first size to an orifice having a shape and a second size. The coupler 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 square pyramidal shape, a truncated triangular pyramidal shape, or a truncated conical shape. The micromachined coupler may further include a tubing stopper defined in the through hole and/or a shoulder defined on a surface of the coupler for bonding to the substrate outside of the cavity.

Abstract: The present invention provides a piping joint and integrated valve with the piping joint, which improve airtight and watertight, maintain connection firm, and keep constant quality regardless repeated user. In connecting part (110, 120) of the joint body (100), the first holes (112, 113), the second packing holes (114, 124) where the first packing rings (170, 180) are inserted, the third holes (116, 126) with a female threaded part inside conjoining the second packing rings (150, 160) and bushes (130, 140), having three holes formed three phases outward on the concentric circle. The first packing rings (170, 180) are made of silicon or Teflon® that is flexible and sustainable against heat.

Abstract: In a pipe joint made of resin of the invention, a cap nut-like pressing ring 9 is screwed to the outer periphery of a pipe receiving port 2 of a joint body 1, and presses an inner ring 8 from the outer side of a pipe member 10 as a result of screw advancement toward the joint body 1. The inner peripheral face 9b of an annular pressing portion 9B of the pressing ring 9 is formed into a straight shape. The inner diameter D of the annular pressing portion is set to be 1.0 to 1.1 times, preferably, 1.01 to 1.05 times the outer diameter d of the pipe member 10, and the length L of the straight inner peripheral face portion in the axial direction is set to be 0.2 to 1.0 times, preferably 0.2 to 0.8 times the outer diameter d of the pipe member 10, whereby the rotational resistance in a process of fastening the pressing ring 9 is reduced, so that the loss of the fastening torque can be reduced and a predetermined sealing force and a predetermined slipping off resistance can be ensured.

Abstract: A pipe coupling includes a housing and a conical split ring which is compressed to firmly clamp a pipe received within the housing. The opposite ends of the split ring defining the split are laterally offset from each other such as to permit the split ring to be compressed to substantially decrease its internal diameter, by the offset ends moving in overlapping relation to each other, thereby enabling the split ring to clamp pipes having a wide range of outer diameters.

Abstract: A piping system that includes a plurality of pipe made of thermoplastic material, a coupling and an arrangement for securing the pipe to the coupling. The coupling is configured so that either a fusable seal or mechanical seal can be used with the coupling to connect the pipe to the coupling. Preferably, the pipe and coupling are made of thermoplastic material.

Abstract: The invention relates to a pipe connector for a pressure-resistant, positive-fit, high pressure screwed joint. The connection includes a formed tube; a screw body or connector branch with a cone, which connects to a parallel axis drilling, with a radial end surface; a union nut; a sealing ring; and a retaining ring. The formed tube has a parallel axis end-piece with the same tube diameter and which corresponds to the depth of the tube seat base. The formed tube has a pronounced head which forms a mating face, with a cone surface of the union nut, and which leads to an abutment face at a front face of the retaining ring, essentially aligned with the tube axis. The retaining ring has a radial ring surface, which, in the assembled state, contacts with the front face of the cone of the connector branch or screw body, and thus permits a block assembly.

Abstract: A connection of a tube to a machine includes a plurality of rolled grooves in a region of contact between the collet of a compression fitting and the tube. The grooves reduce the occurrence of fretting of the tube surface while a region of residual compressive stress formed in the tube proximate the bottom of each groove by the rolling process serves to counteract the stress concentration created by the grooves. In one embodiment a single groove formed in a thread pattern extends from above collet to within the area of contact.

Abstract: A pipe coupling includes a body member (10) formed with a bore (11) for receiving one end of a pipe (P) to be coupled; a sealing ring (20) and a compression sleeve (30) receivable within the bore (11); a radially-deformable gripping ring (40) having one end abuttable against the compression sleeve (30), a securing nut (50) threaded on the body member (10) and engageable with the gripping ring (40) to move the gripping ring (40) axially and to effect a sealing action via the compression sleeve (30) and the sealing ring (20), and also to compress the gripping ring (40) radially to effect a gripping action of the pipe (P) received in the bore (11); and an axially-extending limit element (45) between the gripping ring (40) and the body member (10) effective to cause the nut (50), when tightened; (a) in an initial stage, to move the gripping ring (40) and the compression sleeve (30) until the limit element engages (45) prevents further axial movement of the gripping ring (40); and (b) in a final stage, to radially

Abstract: A coupling receives a non-metallic tube (12) in an opening of a coupling body (10). A seal assembly (22, 24) disposed inside the coupling body (10) seals between the body (10) and the tube (12). A collet (16) disposed in the coupling body (10) includes a tapered external surface (50) that engages a tapered wall in the coupling body (10) to resist pull-out of the tube (12). The collet (16) includes an inner toothed (52) surface for gripping the tube (12) and has a split (70) or slots (54) that allow the collet (16) to radially expand and contract. A rotation prevention member, which in a preferred embodiment is a longitudinal rib (56) extending inwardly from the collet (16), limits relative rotation between the collet (16) and the tube (12). Moreover, edges (74) of the split (70) are rounded so that the collet can rotate relative to the coupling body (10).

Abstract: A quick connect coupling incorporates several improvements including the combination of several functions into a single component. A single stop member provides a structure for holding a check valve spring, and also provides a stop for the check valve. The single component further provides positioning for an o-ring. The coupling also includes a pilot which includes compressible ribs at its outer peripheral surface such that the pilot is self-centering preventing excessive off-centering of the tube. In addition, the position of an o-ring relative to a retainer is tightly controlled such that upon insertion of a tube into the connector, the tube will initially encounter a resistance force by compression of the seal. Once this resistance force is overcome, the tube will immediately begin to encounter a resistance force from the retainer. Thus, an installer does not see two separate resistance forces, but rather sees a continuous single resistance force.

Abstract: A phase controlled sequential gripping tube fitting for gripping a tube therein, the fitting comprising a rear ferrule shaped to receive the tube therein, the rear ferrule having a nose portion and a central body. The tube fitting further comprises a front ferrule having an axially-extending rear portion radially outwardly spaced from the rear ferrule, whereby when the rear ferrule is urged axially in a first direction the rear ferrule grips the tube, and whereby the rear portion of the front ferrule reduces buckling of the rear ferrule.

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: A piping system that includes a plurality of pipe made of thermoplastic material, a coupling and an arrangement for securing the pipe to the coupling. The coupling is configured so that either a fusable seal or mechanical seal can be used with the coupling to connect the pipe to the coupling. Preferably, the pipe and coupling are made of thermoplastic material.

Abstract: The present invention is a connector which connects a first control line in a downhole well tool to a second control line. The connector may include a main body having a longitudinal bore therethrough, a tubular extension threadably secured within a mounting bore in the well tool, and a metal seal ring disposed between a shoulder on the tubular extension of the main body and having an outer conical surface engaged with a conical surface of the mounting bore. The connector may also include a sealing sleeve having a longitudinal bore including a first conical surface adjacent a first end of the sealing sleeve and a second conical surface adjacent a second end of the sealing sleeve; a first ferrule, a second ferrule, and a third ferrule, each being an annular member having an outer conical surface and disposed within the longitudinal bore of the main body.

Abstract: Reject waste water adapter coupling fitting, system and installation method for use with a household undercounter reverse osmosis (R/O) water filtration installation associated with an in-counter sink having a garbage disposer with its outlet connected by standard slip fit plumbing fittings to a sink drain trap plumbed to the household sewer system. The R/O reject waste water undercounter drain line is coupled into the sink drain trap in parallel drainage relation with the disposer outlet plumbing fittings by a baffle Tee plumbing fitting having first and second inlets perpendicular to one another with their input drainage liquid flow separated by an internal baffle. The garbage disposer outlet is coupled by a standard slip fit single inlet/outlet conduit plumbing fitting to the baffle Tee first inlet. The baffle Tee has a single outlet slip coupled to the inlet of the trap.

Abstract: A structure of a pipeline connector is mainly composed of a socket, a restriction ring, a cover ring, a fixed inner pipe, a fixed outer pipe and a stopping ring. The socket is composed of a cone shaped opening and secured with an inner pipe. The opening of the socket comprises a restriction ring and a locknut, with the fixed inner pipe secured within the socket by means of the locknut, the fixed inner pipe and the inner pipe of the fixed inner pipe been inserted through the fixed outer pipe and sleeved with a stopping ring at the end of the inner pipe so as to allow a smooth sliding of the fixed inner pipe and the fixed outer pipe, relatively.

Abstract: A stab-type coupling (10) for connecting a conduit in fluid communication with a fluid receiving article or another conduit includes a coupling body (12) having an internal recess (16). A stiffener assembly (34) is positioned in the recess (16) and includes a tubular member (36) for insertion into a bore (CB) of a conduit (C) inserted into the recess (16). The stiffener assembly (34) also includes a radially enlarged retaining and spacing member (48) connected to the tubular member (36) and located in an axially inner region of the recess (16). The retaining and spacing member (48) includes a conduit end receiving channel (74) defined therein for receiving a conduit end (T) therein. The retaining and spacing member (48) also includes an integral gripping element (76) that engages an outer surface (S) of a conduit (C) seated in the groove (74) to prevent its withdrawal therefrom.

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: A plastic pipe coupling for the joining of plain end plastic pipe that includes a pair of longitudinally displaced annular followers, a tubular middle ring extending between the opposite followers, an annular gasket within each follower contiguous to the middle ring, gripper segments within the follower that are operative during tightening installation of the follower about a received pipe end to effect a penetrating restraining grip against the surface of the pipe end and means on each of said followers cooperating with the end configuration of the middle ring to effect a snap-in-interlock and a perceptive signal when installation is completed.

Abstract: Fluid connector for connecting a first fluid-bearing conduit in a capillary tube to a second fluid-bearing conduit in a receiver. An internal fitting assembly includes an internal fitting body, a body cavity for receiving a ferrule and a self-compensating nut, the ferrule and self-compensating nut being locatable on the capillary tube, and an internal ferrule seat located on a portion of the body cavity, against which a tapered portion of the ferrule is applied to so as to obtain a first fluid-tight seal between the capillary tube, the ferrule, and the ferrule seat.

Abstract: The invention provides a pipe coupling (2) for connecting together a first pipe member (P1) having a liner pipe (L1) arranged in the bore thereof, to a second pipe member (P2); the pipe coupling comprising a first sleeve member (8) arranged to receive an end of the first pipe member (P1) whereby an end of the liner pipe (L1) can protrude axially therefrom; a second sleeve member (10) arranged to receive an end of the second pipe member (P2); a first annular sealing means (12) for disposal about the first pipe member (P1), the first annular sealing means (12) being arranged axially between a first annular collar (4) and the first sleeve member (8); second annular sealing means (14) and first gripping means (62) for disposal about an end of the liner pipe (l1), the second annular sealing means (14) being arranged axially between the first and second sleeve members (8,10); third annular sealing means (16) for disposal about the second pipe element (P2), the third annular sealing means (16) being arranged axially

Abstract: A high pressure connector for engagement with a hydraulic conduit for use in high pressure conditions such as downhole in a wellbore. A housing for receiving a conduit end is attachable to a primary retainer. A primary seal and a second seal are positioned between the primary retainer and the housing to provide redundant sealing capabilities. A secondary retainer holds a third seal against the primary retainer. The third seal provides redundant sealing capability and further provides a secondary gripping connection along the conduit length. The secondary gripping connection provides greater tensile strength and reduces the impact of conduit vibration. A test apparatus can be adapted to test the primary seal and the second and third seals before the connector is installed downhole in the well or other high pressure environment.

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 plumbing compression fitting for use in coupling a first pipe end of a first pipe to an opposing end of a second pipe includes a coupling housing defining a flow passage therethrough, and having a first pipe securing end for engaging the first end of the first pipe, and a second pipe securing end for engaging the end of the second pipe, the flow passage dimensioned to accommodate the ends of the pipes and having a first cross-sectional area. A capture nut has an axial opening in communication with the passageway and is dimensioned to accommodate the first pipe, the capture nut defining an annular seat and being configured to threadably engage the first pipe securing end of the coupling housing. A grab ring has a circumference and is dimensioned be received in the capture nut, an inner grab surface is dimensioned to circumscribe the first pipe and an outer surface configured to engage the seat.

Abstract: A connection system for pressure resistant screwed pipe joints with a retention body, a coupling ring, a pipe and a sealing ring is characterized in that an elastomeric high-pressure seal is provided in the form of a first elastomeric sealing element placed between the face of the retention body and the sealing ring and a second sealing element placed between a face of the sealing ring facing the pipe and the outer wall of the pipe.

Abstract: A sanitary fitting provides a fluid-tight seal between the fitting and the axial end of the tube coupled to the fitting, thereby eliminating crevices between the end of the tube and the sealing point of the fitting and consequent fluid accumulation and potential bacteria growth. The fitting preferably includes a body having a recessed outer end, an elastomeric seal disposed in the recess in the body, a gripping ring slidable into a stepped notch formed in the outer end of the body, and a locking mechanism which grips the tube and which draws the tube into a position in which its end sealingly engages the seal and causes the seal to sealingly engage an annular shoulder of the body. The gripping ring, body, and tube interact to provide very high retention forces permitting the fitting to withstand fluid pressures on the order of several thousand psi.

Abstract: The present invention provides a pipe junction holder for connecting a pipe to a mechanical joint. The junction holder contains a wedge placed between a seal gland and a wedge gland. The wedge has a split opening along its outer sloped surface. The seal gland is adapted for connection to the mechanical joint and the wedge gland. The wedge gland is adapted to seat over the wedge and cause the wedge to clamp on the pipe when the wedge glang is connected to the seal gland. The inner surface of the wedge is designed to clamp along substantially the entire circumference of the pipe when the wedge is tightly held in place over the pipe. The invention also provides a method of joining pipes with mechanical joints, wherein a free end of the pipe is adapted to be seated in a socket end of the mechanical joint.

Abstract: A conduit coupling having a body with an axially extending bore formed therethrough from a first end to a second end. The bore is defined by an inner wall including a frusto-conical surface converging toward the body first end. A radially constrictible and generally annular retaining collet is positioned in the bore. The collet includes an outer frusto-conical surface mating with the frusto-conical surface defined by the inner wall and is axially movable relative thereto. The collet has an inner toothed surface defining a collet inner diameter and at least two radially inwardly extending bite-teeth defining therebetween a distance less than the collet inner diameter and less than an outer diameter of a conduit inserted into the bore so that the bite-teeth engage an outer surface of the conduit. In this manner, upon axial outward movement of the conduit, the frusto-conical surface of the collet bears against the frusto-conical surface of the body inner wall to radially constrict the collet.

Abstract: Reject waste water adapter coupling fitting, system and installation method for use with a household undercounter reverse osmosis (R/O) water filtration installation associated with an in-counter sink having a garbage disposer with its outlet connected by standard slip fit plumbing fittings to a sink drain trap plumbed to the household sewer system. The R/O reject waste water undercounter drain line is coupled into the sink drain trap in parallel drainage relation with the disposer outlet plumbing fittings by a baffle Tee plumbing fitting having first and second inlets perpendicular to one another with their input drainage liquid flow separated by an internal baffle. The garbage disposer outlet is coupled by a standard slip fit single inlet/outlet conduit plumbing fitting to the baffle Tee first inlet. The baffle Tee has a single outlet slip coupled to the inlet of the trap.

Abstract: A double containment coupling is used to form a mechanical joint between double containment pipes. The coupling has an inner primary member within an outer secondary member. Two seals, one on top of the other, are fitted on top of the primary pipe which extends beyond the secondary pipe of the double containment pipe. The coupling inner member is fitted over the primary pipe and seals. An inner locking nut is threaded on the coupling inner member outer surface pushing a thrust ring onto one of the seals, sliding the seal over the other seal compressing and energizing both seals so as to create a seal between the primary pipe and the coupling inner member. A first end of a closure member is threaded onto the outer surface of the coupling outer member. An outer locking nut threaded on a second end of the closure member compresses a seal between the closure member and the secondary pipe creating a seal between the closure member and the secondary pipe outer surface.

Abstract: A tube fitting assembly is provided in which the back sleeve 4 can be simply fabricated without any reduction in its corrosion resistance. The back sleeve 4 is fabricated by pressing the exterior edge of the front end of a short column with a roller 6 of greater hardness than the short column whereby a tapered face 42 is formed on the outer edge of the front end that is harder than the rest of the piece. A bore or cavity is then bored axially through the short column. Thereafter, the back sleeve 4 so formed can be assembled with the tube to be connected, the coupling body 2, the front sleeve 3, and the envelope nut 5 to form an effective tube fitting assembly.

Abstract: A tube connector (1) has a connecting member (2), a nut (7), and a tube (11). To connect the connecting member (2) to the tube (11), the tube includes a formation (12) with two formation portions (14, 16). The first formation portion (14) has a first tensioning face (13) which extends parallel to an end face (4) of the connecting member (2). The second formation portion (16) has a second tensioning face (15). The tensioning face (15) extends in such a way which corresponds to the second conical bore (9) of the nut (7). The end face (4) includes an annular groove to receive a seal (23). The seal (23) achieves a precision sealing effect. A connector (1) which includes a formation as described above provides advantageous sealing conditions and ensures that the formation cannot be overtightened, especially during repeat assembly procedures.

Abstract: In a water flow system, a non-metallic liner 50 is placed within at least a portion of a passage 48 of a supporting metallic end body 38 to preclude contact between any water flowing through the system and the passage of the end body. The liner 50 includes a flared section 60 at a first end 54 thereof which engages a bevelled surface 49 of the end body 38 and is held there in sealing fashion by a cone washer 82 and a nut 84 threadedly coupled to the end body. At a location near a second end 56 of the liner 50, the liner is formed with a first stepped shoulder 62 which facilitates location of the liner within the passage 48 of the end body 38 at the second end of the liner. A second stepped shoulder 64 is formed on the liner 50 which provides a location for an O-ring 72 which engages an adjacent portion of the passage 48 of the end body to form a seal thereby.

Abstract: A pipe coupling for sealing a leak location in a pipe or pipeline by compressing annular gasket members against the pipe or pipeline around the leak location comprises a tubular middle ring, a pair of annular followers, and a pair of annular elastomeric gasket positioners bonded to and protruding from respective followers and positioned so that when the coupling is placed in sealing position, the gasket positioners engage the annular gasket members and force the gasket members into sealing position between the tubular middle ring and the pipe or pipeline. Suitable annular gasket members include rubber O-rings. The gasket positioners may include a retaining ring to prevent outward extrusion of the gasket positioner from between the coupling and the pipe or pipeline.

Abstract: A single piece seal that functions both as a seal and a spring. The single piece seal includes a central bore for receiving a communication line such as a wire or a fiber optic cable. The single piece seal also includes a first and second radial sealing ring, and at least a first axial compression portion between the first and second rings. Preferably the seal includes a second and third compression portions each extending from an outer edge of the first and second rings respectively. Each of the rings may have and radial thickness which is 25% or more greater than the radial thickness of the first axial compression portion, and each of the rings may have an axial length which is 50% or more of the axial length of the first axial compression portion. Preferably the second and third compression portions have an axial length which is at least twice that of either of the rings. Each end of the seal have tapered counter bores communicating with the central bore.

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: In restrained sealed bolted joints of fluid piping systems, including both plastic and metallic pipe, improvements have previously been made in providing adequate grip rings to keep the inserted ends of pipe in place. When larger diameter pipes, especially larger diameter plastic pipes, were inserted into these sealed bolted joints, some difficulties were encountered. Therefore, a compression control ring is now provided to controllably transfer and to limit the tightening force component, which moves the gasket into sealing contacts with the respective pipe sections being joined. Also circumferentially spaced skid pads are positioned about each grip ring, assuring each respective grip ring will not prematurely commence gripping a pipe. In addition, the gland has been improved, so any possible large assembly forces, or any large fluid pressures in the piping system will not be effective in distorting the gland.

Abstract: A connectorized capillary and in-line flow cell system which greatly expedites the construction of capillary zone electrophoresis (CZE) and other separation instrumentation. A capillary is mounted within a cavity formed in a body, and a mechanical fastener is positioned about the body. The inner diameter of the fastener is less than the outer diameter of the body, so that the connector may be firmly coupled to any system component having a corresponding portion adapted to accept the fastener. The connectorized capillaries thus permit permanent or semi-permanent attachment to various in-line flow cell devices such as detectors, valves, buffer reservoirs and the like. For example, an in-line conductivity detector is assembled by connecting a conductivity meter to the opposing ends of the flow cell body. Annular sensing surfaces can also be provided within the cell.

Abstract: A fitting assembly (10) mates an end of polymer micro-tubing (12) in fluid communication with an internally threaded connector (22) having an internal bottom wall (38). The fitting assembly includes a male nut (16) having external threads and a passage for receiving the end of the polymer micro-tubing. The fitting assembly additionally includes an insert (24) having an elongated stem (30) and an annular head (26). The stem projects from the rear side of the annular head for insertion into the end of the polymer micro-tubing. The annular head includes a forwardly projecting nose section (31). An elastomeric seal (40) is received on the nose section (31) and retained in place by a lip (33) included on the nose section. The seal is compressed between the head of the insert and the bottom wall of the connector.

Abstract: A sanitary fitting provides a fluid-tight seal between the fitting and the axial end of the tube coupled to the fitting, thereby eliminating crevices between the end of the tube and the sealing point of the fitting and consequent fluid accumulation and potential bacteria growth. The fitting preferably includes a body having a recessed outer end, an elastomeric seal disposed in the recess in the body, a gripping ring slidable into a stepped notch formed in the outer end of the body, and a locking mechanism which grips the tube and which draws the tube into a position in which its end sealingly engages the seal and causes the seal to sealingly engage an annular shoulder of the body. The gripping ring, body, and tube interact to provide very high retention forces permitting the fitting to withstand fluid pressures on the order of several thousand psi.

Abstract: A quartz pipe joint of the present invention can be used in a connection of, for example, a quartz pipe and a quartz pipe, or a quartz pipe 7 and a synthetic resin tube. The quartz pipe joint A has a joint body having a tapered pressing face a cylindrical sealing member 33 having a tapered receiving face 33, a lock ring which can deform to increase its diameter and deform to reduce its diameter and which can be fitted into an annular groove of the quartz pipe and a nut. When the lock ring fitted into the annular groove and the sealing member fitted into the quartz pipe are clamped by threadedly connecting the nut to the joint body, the sealing member is deformed to reduce its diameter by the function of the pressing face and the receiving face, so as to closely contact with the outer peripheral face of the quartz pipe, thereby exerting sealing properties. The lock ring engages with a groove wall of the annular groove to prevent the quartz pipe from slipping off from the joint.

Abstract: A fast tube connector structure including a tube connector, a rubber fastening washer, a guiding sleeve, a conic spring washer and a sleeve-like nut, wherein a tube is inserted through the nut into a space defined by the spring washer, guiding sleeve and fastening washer and located on a tube seat of the tube connector. The nut is then secured onto the tube connector, forcing the spring washer to move downward and causing a narrow end thereof to move downward along an inclined guiding flange. The claw portion is thus compresses by the guiding flange to tightly clamp and fasten the tube and firmly fictionally associate the tube with the tube connector.

Abstract: A connectorized capillary and in-line flow cell system which greatly expedites the construction of capillary zone electrophoresis (CZE) and other separation instrumentation. A capillary is mounted within a cavity formed in a body, and a mechanical fastener is positioned about the body. The inner diameter of the fastener is less than the outer diameter of the body, so that the connector may be firmly coupled to any system component having a corresponding portion adapted to accept the fastener. The connectorized capillaries thus permit permanent or semi-permanent attachment to various in-line flow cell devices such as detectors, valves, buffer reservoirs and the like. For example, an in-line conductivity detector is assembled by connecting a conductivity meter to the opposing ends of the flow cell body. Annular sensing surfaces can also be provided within the cell.