Abstract: A coupler for connecting a first fluid conveying member and a second fluid conveying member includes a first coupler half, a second coupler half, and a conductive gasket. In embodiments, at least one of the first coupler half and the second coupler half include an annular groove configured to receive at least a portion of the conductive gasket; the conductive gasket comprises non-metallic material, the first coupler half and the second coupler half are configured to connect and circumferentially surround portions of said first and second fluid conveying members, and the conductive gasket provides a portion of a conductivity path from a first end of the coupler to a second end of the coupler, and may be part of a conductivity path from a first fluid conveying member to a second fluid conveying member. Embodiments of a non-metallic conductive gasket and methods of making a coupler assembly are also disclosed.

Abstract: A coupling assembly having first and second sleeves configured to be tightened to a fluid conduit, a radial-split gasket configured to be positioned between the sleeves and the fluid conduit and having an outer gasket layer and a separate inner gasket layer configured to be selectively disengaged from each other, the outer gasket layer having a radial gap defined by first and second radial side wall gap surfaces, the inner gasket layer having a radial gap and a radial insert configured to be received in the radial gap of the outer gasket layer between the first and second radial side wall gap surfaces.

Abstract: The improved dust boot includes a dust boot body which is made as one integral piece of an elastomeric material and extends from a first end portion to a second end portion. The second end portion of the dust boot body includes a first sealing portion and a second sealing portion which is spaced from the first sealing portion. The first sealing portion includes a plurality of ribs that are spaced circumferentially from one another by a plurality of grooves and includes a plurality of relief valves that are located in the grooves and extend away from the first end portion for allowing a lubricant to pass the first sealing portion in one direction and for restricting the passage of contaminants past the sealing portion in an opposite direction.

Abstract: Coupling devices for joining pipe ends include annular gaskets. Example gaskets include pipe interface profiles for sealing performance and manufacturability.

Abstract: A method of use of a conduit coupling system, sealing device, and bell are disclosed herein. The method comprises positioning a sealing device inside a bell coupled to one end of a first conduit, inserting a spigot of a second conduit through the sealing device inside the bell, wherein the sealing device is adapted to move axially within the bell in the direction of the insertion of the spigot and in a radial direction from a centerline of the conduit, and partially removing the spigot from the bell, wherein a segment of the sealing device engages the outer surface of the spigot end as the spigot end is partially removed from the bell. The bell comprises a first end and a second end, the first end coupled to the first conduit. The bell has a concave annular inner surface and a diameter of the annular inner surface adjacent to the first end of the bell is greater than a diameter of the annular inner surface adjacent to the second end of the bell.

Abstract: A conduit coupling system, sealing device, bell and method of use are disclosed herein. The system comprises at least two piping components, and a sealing device. A first component has a bell and a second component has a spigot, the spigot is adapted to mate with the bell. The bell comprises a first end and a second end, the first end coupled to the first component. The bell has a concave annular inner surface and a diameter of the annular inner surface adjacent to the first end of the bell is greater than a diameter of the annular inner surface adjacent to the second end of the bell. The sealing device comprises a locking segment comprising a convex outer surface and a K-type gasket coupled to a locking segment or a non-restraining anti-extrusion segment. The sealing device is adapted to fit between the bell and the spigot.

Abstract: A secondary-fuel inductor for an engine including a carburetor with a primary fuel inlet having an outlet end. The inductor includes a gasket and a fuel conduit. The gasket defines an opening through which the fuel conduit extends. The fuel conduit has a bend defining a first segment and a second segment. The first segment includes a gasket-spanning segment that extends through the fuel-conduit opening and an inlet end that can have a connector for connection to a fuel line for a secondary fuel. And the second segment includes an outlet end positioned within a venturi area of the carburetor, for example, immediately adjacent the outlet end of the primary fuel inlet.

Abstract: An apparatus for restraining plastic pipe against both internal and external forces at a pipe or fitting connection and to join and seal at least two pipes to form a pipeline is shown featuring an improved restraining and sealing mechanism. The restraining and sealing mechanism includes a circumferential housing and a companion sealing ring which are received within a mating groove provided in the belled end of a female pipe. The circumferential housing has an interior region which contains a gripping ring insert. The sealing ring and housing are integrally located within a belled pipe end during belling operations. Either the exterior of the gripping ring or the interior of the housing or both are provided with a low friction coating.

Abstract: Each of ridges 7 on respective opposite side surfaces of a gasket 4 has a trapezoidal cross sectional shape defined by an outer tapered face 7a providing an outer peripheral surface, an inner tapered face 7b providing an inner peripheral surface and a flat face 7c providing a top end surface. The hardness of the gasket 4, the angle between the tapered faces 7a, 7b of the ridge 7, the height of the ridge 7 and the area of the flat top end face 7c of the ridge are so determined that the value of thrust for tightening up the coupling is between a predetermined minimum value and a predetermined maximum value.

Abstract: Each of ridges 7 on respective opposite side surfaces of a gasket 4 has a trapezoidal cross sectional shape defined by an outer tapered face 7a providing an outer peripheral surface, an inner tapered face 7b providing an inner peripheral surface and a flat face 7c providing a top end surface. The hardness of the gasket 4, the angle between the tapered faces 7a, 7b of the ridge 7, the height of the ridge 7 and the area of the flat top end face 7c of the ridge are so determined that the value of thrust for tightening up the coupling is between a predetermined minimum value and a predetermined maximum value.

Abstract: Sealing systems for high pressure applications that provide electrical isolation between joined elements as well as enhanced resistance to leakage of media during a fire. High pressure sealing is accomplished using a metallic core to which an electrically isolating material is bonded on either or both sides. Sealing is achieved through a dielectric sealing element, such as a spring-loaded polytetrafluoroethylene (PTFE) ring. Flanges of the joint may be bolted together with the seal interposed therebetween, and the flanges bolted together. In the event of a fire, heat may be generated that is at a high enough temperature to burn away the isolating material and PTFE ring. Systems of various embodiments provide a metal core backup seal and a compression limiter, which, respectively, prevent the media from leaking from the joint and maintain bolt load at the flanges.

Abstract: A sealing gasket is shown for use in a ductile iron piping system to form a sealed joint between mating male and female pipe ends. A sealing gasket body is provided with a series of retainer inserts which extend outwardly from a leading nose region of the elastomeric gasket body. The mating male pipe end contacts the retainer inserts prior to contacting the remainder of the gasket body during the make up of the pipe joint. The inserts help to retain the gasket within its associated groove during high pressure field conditions. The inserts are spaced circumferentially about the gasket nose region, allowing the gasket the necessary flexibility to allow insertion within the groove provided in the female, belled pipe end.

Abstract: Gasket comprising an inner ring having an outer surface, an outer ring having an inner surface, and an intermediate ring disposed between the inner ring and the outer ring, wherein the intermediate ring has an inner surface in contact with the outer surface of the inner ring and an outer surface in contact with the inner surface of the outer ring, and wherein the intermediate ring is made of a material that has a hardness less than the hardness of the material of each of the inner ring and the outer ring.

Abstract: A configuration for sealing-off two fluid-carrying subassemblies, in particular for sealing-off a case, the inner space of which is filled with a first fluid and through the inner space of which there is led a pipeline filled with another fluid which flows into a construction space that is separated from the inner space filled with the first fluid by a case wall. Between a first sealing element and a second sealing element there is disposed a supporting ring, which, on each of its side faces assigned to the sealing elements, has a contour for the reception and diversion of a fluid volume which has flowed onto the supporting ring as a result of leakage in the region of the respectively assigned sealing element.

Abstract: A sealing gasket for a ventilation duct system includes an annular gasket body and a pair of annular sealing flanges extending radially outwardly from the gasket body. The sealing gasket has, in axial cross-section, a generally flat top wall and a curved or, alternatively, a radiused bottom wall. One of the sealing flanges is positioned adjacent one circumferential edge of the sealing gasket and the other sealing flange is positioned axially spaced from or offset from the opposite circumferential edge of the sealing gasket. The sealing gasket is provided to form a generally air-tight seal between overlapping ends of first and second components of a ventilation duct system.

Abstract: A pipe sealing gasket is shown which is designed to be received within a groove provided within a socket end of a thermoplastic pipe in a pipe sealing system. The sealing system includes a male, spigot pipe end which is joined to a mating female belled pipe end. The belled pipe end has an internal groove adjacent a mouth region thereof which is simultaneously formed under temperature and pressure as the mouth region is forced over a forming mandrel and about a sealing gasket located on the forming mandrel so that the sealing gasket is prelocated within the internal groove. The sealing gaskets of the invention have a specially designed sealing capability to seal volume ratio.

Abstract: A trailer hitch assembly includes a receiver portion including a cylindrically-shaped cavity, a bushing member received within the cavity of the receiver portion, and a hitch member that includes a shaft pivotally received within the bushing member. At least a selected one of the bushing member and the shaft is constructed of a material that substantially eliminates the need for using a separately applied lubricant during use of the trailer hitch assembly.

Abstract: A mechanical pipe joint, restraining gasket, and method for restraining pipe spigots within adjacent bell sockets. The restraining gasket is composed of two axially-separate components: a sealing portion and a restraining portion made of a plurality of arcuate locking members. The restraining gasket and a gland surround an outer surface of the pipe spigot. The mechanical pipe joint is formed as the pipe spigot is inserted into the bell socket and the gland is axially attached to the bell socket so that the restraining gasket is held between: the gland, an inner surface of the bell socket, and the outer surface of the pipe spigot, so as to provide a fluid seal in the joint and urge the locking members into contact with the outer surface of the pipe spigot, axially restraining the pipe spigot within the bell socket.

Abstract: A multipurpose plumbing tool has a body at one end, a head at an opposite end and an intermediate neck portion connecting the body and head. The marginal end portion of the body is cut back to form a reduced section, a shoulder being formed at the junction of the reduced section and a non-reduced section of the body. The reduced section is internally and externally threaded. An inwardly tapered seat for an O-ring is formed in the shoulder. An O-ring positioned in the tapered seat is compressed and contained within the tapered seat to provide a water tight seal when the externally threaded end is threaded into a female fitting. The free end of the head is formed with an internally threaded socket. A washer seated at the bottom of the socket provides a water tight seal when the socket is screwed onto a male plumbing fitting.

Abstract: A sealing and restraining gasket for preventing separation of a pipe joint used to join a bell end of a female pipe to the male end of a mating pipe. The gasket is formed from a compressible body of elastomeric material and carries a rigid ring with gripping teeth for engaging an outer surface of the mating male pipe. The ring has a gap at one location. The gripping teeth of the rigid ring are oriented so as to be out of contact with and initially angled away from the outer surface of the male plastic pipe. The teeth are forced into engagement with the exterior surface of the male pipe as the pipe joint is assembled and the gap in the ring is partly closed. The teeth are oriented to allow movement of the male pipe in a first direction relative to the female bell end opening during assembly, but to resist movement in a opposite direction after the pipe joint has been assembled.

Abstract: A restraining element for preventing separation of a pipe joint used to join a bell end of a female plastic pipe to the male end of a mating pipe. The restraining element is formed from a compressible body of elastomeric material, the compressible body having a segmented metal ring located therein with gripping teeth for engaging an outer surface of the mating male pipe. The ring segments making up the segmented metal ring are oriented such that the gripping teeth of the ring segments are out of contact with and initially angled away from the outer surface of the male plastic pipe. The teeth of the annular gasket are forced into engagement with the exterior surface of the male plastic pipe as the pipe joint is assembled. The teeth are oriented to allow movement of the male pipe in a first direction relative to the female bell end opening during assembly, but to resist movement in a opposite direction after the pipe joint has been assembled.

Abstract: A restraining element for preventing separation of a pipe joint used to join a bell end of a female plastic pipe to the male end of a mating pipe. The restraining element is formed from a compressible body of elastomeric material, the compressible body having a segmented metal ring located therein with gripping teeth for engaging an outer surface of the mating male pipe. The ring segments making up the segmented metal ring are oriented such that the gripping teeth of the ring segments are out of contact with and initially angled away from the outer surface of the male plastic pipe. The teeth of the annular gasket are forced into engagement with the exterior surface of the male plastic pipe as the pipe joint is assembled. The teeth are oriented to allow movement of the male pipe in a first direction relative to the female bell end opening during assembly, but to resist movement in a opposite direction after the pipe joint has been assembled.

Abstract: A sealing system adapted for placement into an exterior groove of a structure. The sealing system includes a seal ring having a generally ‘L’-shaped cross-section. The sealing system further includes a canted-coil spring. The seal ring includes an inner surface, an outer surface and two side surfaces. The seal ring's inner surface features a groove that increases the ring's flexibility. The seal ring's outer surface protrudes outwardly until it is pushed inwardly through contact with an inner surface of an external structure. As the outer surface moves inwardly, it causes a compression of the spring while a part of the seal ring flexes and bends about the seal ring's groove. At the same time, the outer surface becomes reoriented in a manner that cause its shape to change to a flatter configuration that is more complementary to the inner surface of the internal structure.

Abstract: A self-adhesive gasket having a pressure sensitive adhesive on one side or on both sides can be used in place of plumbers putty to seal sinks to countertops, faucets to sinks, and strainers and pop ups to sinks and tubs. The gasket is preferably preformed from a flexible cellular plastic, preferably a closed cell urethane foam. The gasket may be used in a multitude of plumbing application to form a liquid seal.

Abstract: The invention relates to a flap seal in the form of a lamella seal, comprising at least three essentially flat individual rings (1, 10) lying one on top of another in a bundle-type form. Said individual rings (1, 10) comprise an inner part which is respectively defined by an inner circumferential surface (2, 11). The outer-lying individual rings (1) are covering rings, and the inner-lying individual rings (10) are sealing rings. High-quality sealing surfaces can be produced by allocating positioning means to the covering rings (1) for positioning said covering rings (1) in relation to one another in the circumferential direction and/or in relation to inner-lying sealing rings (10) in the radial direction. The positioning means also enable a relative movement in the axial direction.

Abstract: A connection for threaded pipes and other tubular sections including a gasket for interposition between a first and an opposing second interface surface of the connection. The gasket includes a retainer and a generally annular seal element received in a groove formed into at least one side of the retainer. Such retainer side further is formed as having one or more channels extending extend radially through the groove and the inner or outer perimeter of the retainer. Each such channel defines a vent for relieving hydrostatic fluid pressure as the gasket is compressed between the interface surfaces.

Abstract: A gasket for interposition between a first and an opposing second interface surface of a sealing assembly. The gasket includes a retainer and a generally annular seal element received in a groove formed into at least one side of the retainer. Such retainer side further is formed as having one or more channels extending extend radially through the groove and the inner or outer perimeter of the retainer. Each such channel defines a vent for relieving hydrostatic fluid pressure as the gasket is compressed between the interface surfaces.

Abstract: A method and apparatus for restraining pipe against internal forces at a pipe or fitting connection and to join and seal at least two pipes to form a pipeline is shown featuring an improved self restrained pressure gasket. The pressure gasket has a rigid ring formed as an integral part of the gasket thus making the gasket easy to install. The rigid ring which forms the restraining mechanism has rows of teeth of varying lengths that, when assembled, engage at various points around the circumference of a mating pipe. The teeth adjust to the tolerances allowed in pipe manufacturing without losing gripping capacity.

Abstract: A leakage restriction device for a refrigeration cycle of a vehicle air conditioner in which refrigerant flows has first and second rubber gaskets. The first and second gaskets are disposed between a pipe and a pipe joint of the refrigeration cycle for restricting refrigerant from leaking into atmospheric air. The first gasket is disposed on an atmospheric-air side and the second gasket is disposed on a refrigerant side between the pipe and the pipe joint. The first gasket has a gas permeability lower than that of the second gasket, and has a blistering-resistance which is inferior to that of the second gasket. As a result, refrigerant is restricted from leaking into atmospheric air, and a blister is restricted from being formed in the first and second gaskets even when a pressure of refrigerant is rapidly changed.

Abstract: A sealing ring for sealing the connection of a spigot of a corrugated pipe with a pipe socket has inner beads and lip seals bearing against flanges. Said sealing ring further has an outwardly projecting sealing bead having a central annular bead and two annular collars projecting laterally outward. When said pipe socket is pushed onto said spigot, said sealing bead is rolled in in such a manner that said central annular bead and one annular collar bear against said inside wall of said socket in a sealing-tight fashion.

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

Abstract: A flat ring packing to be placed between two flanges comprises two packing layers of packing material and an intermediate ring of metal, which is disposed between the two packing layers and has a common central longitudinal axis therewith. Each packing layer is fixed on the intermediate ring substantially without play radial and parallel to the axis by means of a connection.

Abstract: A press fitting for producing a nondetachable tight connection of smooth-ended pipes which has at least one portion receiving a toroidal sealing element and an adjoining cylindrical area extending in the longitudinal direction, and is provided with a shoulder acting as a stop for the pipe which can be pushed in or pushed on. The sealing element has, in the circumferential direction, at least one portion which is provided with a cross section diverging from the starting cross section in that a bulge extends along the circumference and along the cross-sectional plane and a recess facing the pushed in pipe extends radially in the cross section of the sealing element, the volume of the bulge compared with the starting cross section is at least equal to the volume of the recess lacking at the starting cross section and, before pressing, the recess of the sealing element forms a through-opening in the axial direction viewed in cross section.

Abstract: A device 7 for the assembly of a straight spigot 1 and a flange 3 of two pipe elements 2, 4, containing an axial compression sealing elastomer gasket 8. The gasket has a support body 15 bearing against a counter flange 11 to apply pressure to the gasket. To the front of the body 15, and interdependent of it, is a support heel 16 for bearing against the flange. A radial exterior surface 22 of the body is designed to rest on a reaction surface 27, 27a of the counter flange, a radial interior surface 18 of the body is designed to rest on the radial exterior surface 20 of the straight spigot, and a forward surface 31 of the heel is designed to press against the flange to insure the waterproofness of the assembly. The body has at least one recess 26 for the expansion of the elastomer of the pressurized gasket, and the device is fitted with a ring 9 to limit the radial expansion of the heel toward the exterior.

Abstract: A connector element is provided for tubing or hoses of elastically expandable material with a tubular part of inelastic material that can be inserted tightly sealed into a tubing or hose end and that features a so-called pine-cone or thorn profile. In order to simplify the handling and to improve the sealing effect, this connector element has an axially extending cylindrical area with an outer diameter matched to the inner diameter of the tubing or hose end at the front end of the tubular part. A circumferential groove, rectangular in cross section, into which an annular seal of noncircular cross section is arranged is formed in the cylindrical area.

Abstract: A plastic or polytetrafluoroethylene split seal ring having highly flexible, annularly extending, axially spaced apart side walls is disclosed for sealing opposed, concentrically overlapping open end portions of a pair of gas conduits together or for sealing a sleeve of a flexible coupling to end portions of two opposed, spaced apart gas conduits is disclosed. The ring includes an annularly extending base portion, a pair of axially spaced apart, annularly extending side walls connected to and along opposite sides of the base portion. The side walls project radially beyond a radially inwardly or radially outwardly facing surface of the base portion to form a groove in which an expansion or contraction member can be disposed to effect a gas tight seal of the ring against and around a surface of one of the conduits.

Abstract: An improved joint for a variable wall thickness conduit is disclosed. The joint includes a female joint section and a male joint section. The female joint section has a body portion which terminates in a first support surface and a sealing sleeve which extends beyond the first support surface. The sleeve has a first sealing surface and a thickness. The male joint section has a body portion that terminates in a wall and a sealing nose that extends beyond the wall. The wall has a width greater than the thickness of the sleeve. The nose includes a load bearing surface, a second sealing surface and a recess in the second sealing surface. The female joint section aligns and joins to the male joint section, the load bearing surface being in force transmittal relationship with the first support surface, whereby a gap is formed between the first sealing surface and the second sealing surface.

Abstract: This invention provides an oil well pipe threaded joint capable of preventing looping and squeezing of a soft synthetic resin ring and consequently, preventing catching of a tool during a logging operation and damage such as corrosion by a corrosive fluid, the oil well pipe threaded joint employs the construction wherein a soft synthetic resin ring is interposed between distal end surfaces of pins, each step surface of a shoulder portion on an inner peripheral side of a coupling and a step surface of each pin are brought into abuttment, and each inside thread of the coupling of the coupling and each outside thread of each pin are engaged, wherein a compressive ratio of the soft synthetic resin ring in an axial direction falls within the range expressed by an inequality 18,000/E≦compressive ratio (%)<0.038−1×1n[1−{(d1−d2)+0.36}/0.

Abstract: A pipe coupling (10) for coupling and sealing adjacent ends of two pipe sections (12, 14) of the same or different outer diameters. The pipe coupling (10) includes an annular sleeve (24), a pair of annular gaskets (22) and a pair of follower flanges (20) that surround the adjacent ends of the pipe sections (12, 14). The gaskets (22) have inclined front walls (42) that are angled generally complementary to clamping surfaces (28) formed at opposite ends of the sleeve (24). The gaskets further include inclined back walls (52). As the follower flanges (20) are urged toward the opposite ends of the sleeve (24), the inclined back walls (52) of the gaskets (22) cooperate with skirts (32) formed on the follower flanges (22) to cause the gaskets (22) to readily toe-in toward the outer walls of the pipe sections (12, 14) at relatively low torque and cause sealing engagement with pipe ends sections (12, 14).

Abstract: A pipe sealing gasket is shown which is designed to be received within a groove provided within a socket end of a thermoplastic pipe. The gasket has a ring shaped body of an elastomeric material and includes a metal reinforcing band. The metal reinforcing band has an angular profile, when viewed in cross-section, with an apex which is embedded within the gasket body but lies in close proximity to an exterior surface of the gasket. The apex provides a reinforced contact point during belling operations but is isolated from surrounding liquids passing through a pipe joint.

Abstract: A gasket is provided for joining lengths of pipe having dissimilar end faces which are of approximately equal diameters and which are substantially normal to the longitudinal axis of the pipes. The end faces each include a circular recess which are of differing diameters. The gasket has a first side which has a surface contour which is a mirror image of one of the faces and the opposite side has a surface contour which is a mirror image of the other end face. The outer periphery of said gasket is of a substantially lesser thickness than its inner marginal portion so that compression during use of the thicker inner marginal portion is minimized.

Abstract: A pipe fitting (1) for connecting a metallic pipe line (10), including a pipe union (4), which contains a receiving opening (8) for the pipe line (10), a swivel nut (6), which can be threadedly connected with the pipe union (4), as well as metallic cutting ring (18), which is disposed between the pipe union (4) and the swivel nut (6). The cutting ring (18) with an outer cone (30) acts jointly with an inner cone (28) of the pipe union (4) in such a manner, that, when the swivel nut (6) is tightened, it cuts into the material of the pipe line (10) with at least one cutting edge (32) and generates a form-fitting junction. The cutting ring (18) includes--where it joins an outer cone (30)--an essentially radial contact surface (38) for the purpose of limiting the tightening force, when it comes into contact with a face surface (40) of the pipe union (4).

Abstract: A pipe coupling for connecting pipes having unprofiled end sections includes an elastomeric sealing gasket for holding the unprofiled pipe end sections in a sealed manner. A clamping clip surrounds the sealing gasket. The clamping clip includes a clip strap having a first end and a second end. A first clamping jaw is formed at the first end. A second clamping jaw is formed at the second end. The clamping jaws are drawn together by a tensioning device. The clip strap has radially inwardly directed projecting flanges on each of its axial ends. A first C-shaped clamping ring and a second C-shaped clamping ring are each disposed between the sealing gasket and one of the flanges. Each of the C-shaped clamping rings are supported on a radially inner side of the clip strap. Each of the C-shaped clamping rings have projections projecting from its radially inner face and, when said clip strap is tensioned, the projections of the C-shaped rings engage in the pipe material.

Abstract: The present invention relates to a pressure medium plug-in connector, consisting of two connector parts, i.e. a housing part (2) and a plug part (4), wherein the plug part (4) with a plug shaft (6), via at least one peripheral seal (10) located in an annular groove (14) of the one connector part (4) and interacting with a peripheral sealing surface (18) of the other connector part (2), can be inserted in a sealed manner into a receiving opening (8) of the housing part (2) and can be secured against release by means of a locking arrangement (12). The locking arrangement (12) is constructed in such a way that a partially plugged, prelocked position and a completely plugged, fully locked position are ensured. In the prelocked position, a seal is present which is so incomplete that, if pressure is applied with a pressure medium, a clearly limited perceptible leak, particularly in the form of an audible leaking sound, occurs.

Abstract: A plug connection for a pressure system comprising a receptacle part and a plug part, the plug part is inserted into the receptacle part and retained therein by a locking device which forms a prelocked, unsealed connection and a locked, sealed connection between the plug part and the receptacle part with a limit stop element which indicates when the locked, sealed connection has been obtained.

Abstract: A pipe sealing gasket is shown which is designed to be received within a groove provided within a socket end of a thermoplastic pipe. The gasket has a ring shaped body of an elastomeric material and includes a metal reinforcing ring. The elastomeric body includes a first portion of relatively low durometer rubber and a second portion of a relatively high durometer rubber. The regions of relative hardness and the placement of the reinforcing ring assist in retention of the gasket during the pipe belling process and in field installation.

Abstract: A method of maximizing system operating pressure capability of a selected flange joint in a fluid carrying pipeline system comprises minimizing bold load operating conditions and bolt load pre-load conditions at the selected flange joint by interposing a self-energizing seal assembly having negligible "m" and "y" values in surrounding relation to the joint's axial bore. The load producing moment resulting from connection of the flanges with the bolts is minimized by interposing a gasket element having a gasket thickness less than the seal thickness of the self-energizing seal assembly. The gasket element is interposed in a surrounding relation to the seal assembly at an outer radial location proximate to the outer flange surface margin.

Abstract: The invention provides a method for sealing and locking together interconnectable pipe for industrial, commercial and other uses. The sealed locking joint is comprised of the smaller end of one pipe, spigot end, which is inserted into the larger end of the receiving pipe, bell end. A sealing gasket and a corresponding locking gasket are utilized to retain the pipe in its assembled position and prevent leakage of material at the joint. Alternatively, a sleeve may be utilized into which is inserted the spigot ends of the pipe, said sleeve having positioned within it sealing gaskets and locking gaskets similar to the configuration utilized in the bell end of the alternate assembly.

Abstract: In order to improve the reliability of sealing property of a flare-type pipe joint, a flare-type pipe joint is designed such that a sealing material composition containing thermosetting resin, a curing agent, and fluororesin powder is applied onto a conical flange surface which abuts on a flare portion and then subjected to heat treatment so that the sealing material composition is subjected to crosslinking reaction to thereby form an elastic sealing layer. Further, it is preferable that the fluororesin powder is non-sintered fluororesin powder which is not subjected to crystallizing treatment made by sintering process.

Abstract: A pipe coupling for coupling together two lengths of pipe comprising first and second collars or flanges secured to the ends of the lengths of pipe and having joining surfaces thereon which abut one another on securing the lengths of pipe together,radially aligned grooves are formed in the joining surfaces for receiving a seal which includes a rigid first seal component and a flexible second seal component bonded to the first seal component,the seal extending partially into both grooves to seal between the joining surfaces of the collars.