Abstract: A fluid swivel is described, which is especially useful for carrying hydrocarbons at high pressures between stationary and rotating walls of a swivel. The swivel forms a fluid-carrying annular chamber and a pair of gap-like passages lying between the walls and extending from opposite sides of the chamber to the environment, with primary and secondary face seals located along each passage. Each passage includes a portion extending between the seals, the passage portion forming a pair of largely radially-extending wall surfaces, one on the outer wall and one on the inner wall. The radially-extending wall surface on the outer wall faces in a first axial direction, and the outer wall at the secondary seal faces in an opposite axial direction. As a result, if the primary seal should fail, this will not change the axial force on the outer wall. The extrusion gaps at the seals extend in radial directions from the seal, so these gaps do not widen when high pressure is applied to the fluid swivel.

Abstract: An annular lip type sealing ring includes an annular body with a generally U-shaped cross-section having a curved heel or base portion in the preferred embodiment and two spaced apart lip portions that define a groove therebetween. The groove terminates at a closed inner end portion near the heel or base and at its opposite end adjacent an open end portion. At least one of the lip portions has respective inwardly and outwardly extending lateral projections. The outwardly extending lateral projection seals against for example a valve shaft, pump plunger or the like. The lip portion has an outer free end with an outer arcuate curved surface. The inwardly extending laterally projecting portion includes an inner curved surface. An elastomer pre-loads the lips with a load that biases the lips to spread apart. The inwardly extending lateral projections conform to and confine the elastomer.

Abstract: A dual function gasket adapted for insertion into a suitable groove formed in the bell of an associated pipe includes an annular gasket body made of a resilient material. The body terminates radially inwardly in a leading lip and a pressure activated sealing lip spaced rearwardly therefrom. An annular groove is provided in the gasket body and an annular locking ring may be selectively inserted into the groove. The ring is made of a material harder than the gasket body and is inserted into the groove when a high pressure seal is desired. The ring may be removed when only a low pressure seal is desired.

Abstract: A high pressure rotary union includes a housing enclosing a hollowed shaft. seal enclosure is keyed within the housing and receives a sealing ring which is biased by a circular spring to maintain low friction intimate sealing engagement between the ring and shaft despite minor eccentric shaft displacement.

Abstract: A boltless restrained pipe joint having means for accommodating axial misalignment of a spigot in a bell mouth and having snap ring means disposed in a restraining assembly for holding the spigot and bell mouth against axial separation.

Abstract: A hard outer member generally centered on an axis and having a concave inner surface is injection molded of a relatively hard synthetic resin to have on its inner surface at one end a recess formed with a radially throughgoing passage. Parts of the mold in which this member is molded are then displaced before the resin has time to cure and another softer synthetic resin injected through this radially throughgoing passage to form in the recess a relatively soft seal having a sprue extending through the passage. The seal therefore adheres in surface contact with the inner surface at the recess and the sprue further ensures excellent holding of the seal on the member.

Abstract: In a pipe coupling for connecting pipes as fluid conduits, a split clamping ring, which is of arcuated configuration in cross section, has a pair of spaced circular sharp edges directed toward the pipe for firm engagement therewith and is disposed in an annular groove formed internally of a body so as to be slightly displaceable relatively to the groove in an axial direction of the body when a certain axial force is applied to the pipe; a deformable sealing ring is disposed in another annular groove formed internally of the body; and a plurality of depressing members are provided for adjustably compressing the clamping ring diametrically.

Abstract: An automatic tire inflation/deflation system for a vehicle (10) is disclosed. Air passageways for the pressurize air are provided internally through the wheel assemblies without cutting into load bearing members. A rotating seal is provided by way of a pair of sealing rings (52,54) located inboard of the hub bearings (32,33) to protect the seals from adverse environmental conditions. A kit for retrofitting vehicles to include an automatic tire inflation/deflation system is also disclosed. Ramp surfaces (90, 91, 92) formed in the hub (30') are provided to facilitate removal of the bearing assemblies (32, 33).

Abstract: A threadless pipe fitting of the "stab-in" type wherein a fluid tight connection between a cylindrical conduit and fitting is achieved merely by inserting the fitting upon the conduit end. An annular elastomeric seal within a groove defined in the fitting conduit receiving bore engages the conduit outer surface in a combination compression and lip seal manner wherein both elastomeric compression forces and fluid pressure forces maintain a sealing engagement between the seal and conduit. Additionally, set screw means radially threaded into the fitting mechanically maintain the conduit and fitting assembly, and the set screw includes torque limiting means for preventing excessive radial forces, and the nose of the set screw means is shaped to provide maximum frictional engagement with the conduit with minimal radial force.

Abstract: Pipe with socket end provided with an annular groove chamber containing a sealing ring supported by a support ring, which support ring compresses the sealing ring less than the final inserted spigot end. The support ring closes the groove and the sealing ring or the closed space is provided with lubricant.

Abstract: A fitting for connection to a metal plain end pipe includes a generally cylindrical sleeve section sized to receive and cradle a pipe end portion, an annular seal in the sleeve section for forming a liquid tight connection between the pipe end portion and the fitting, and a screw cutter member extensible into the sleeve section for locking the pipe end portion to the fitting. An end surface of the cutter member has an annular ring of projecting cutting elements having intersecting faces forming metal cutting edges, each cutting element being respectively spaced from another cutting element by transverse recesses for relief of chips cut from the pipe. The cutting edges each have a rake angle configuration relative to the pipe end portion such that a limited cutting penetration is achieved under a predetermined pressure range and travel speed along a pipe end surface.

Abstract: The present invention relates to improved rapid coupling for plastic pipes, capable of being assembled by hand, comprising two cylindrical tubular pieces which are connected axially together by interlocking, with the interposition of a double-lipped gasket, the female piece being the receiver of the end of the pipe, the penetration of which causes the expansion of the female piece on the male piece, thus producing a watertight seal which is the greater, the higher the service pressure.

Abstract: A fitting for connection to a metal plain end pipe includes a generally cylindrical socket section sized to receive and cradle a pipe end portion, an annular seal in the socket section for forming a fluid-tight connection between the pipe end portion and fitting, and a locking device extensible into the socket section for securing the pipe end portion to the fitting. The socket section has a first bore extending from an exterior surface substantially through the socket wall and a coaxial, second bore of lesser diameter than the first bore extending the remainder of the way. The locking device includes a shaft having a head end and an opposite tip end for extension through the first and second bores and inwardly of the socket wall interior surface for engagement with a wall of a pipe end portion positioned in the socket section. A ring seal around the shaft engages a side wall of the first bore for providing a fluid-tight engagement between the shaft and the side wall.

Abstract: There is disclosed a pipe joint comprising a first pipe having an end portion engaged as a snug fit in a concentric end portion of a second pipe. The pipes have, at positions spaced from their adjacent ends, external annular ribs with corresponding internal annular grooves, an annular seal being accommodated in the annular groove of the outer pipe between the outer pipe and the inner pipe.A clamping ring which spans the annular ribs of the two pipes comprises two arcuate parts connected end to end by a hinge and having at their ends remote from the hinge outwardly turned edge formations which are received in a wedge-shaped channel member and engage relatively inclined opposing side walls of the channel member. The clamping ring can simply be closed around the pipe joint by relative pivoting of the two arcuate parts and can be retained by sliding the wedging member, in a direction parallel with the axis of the pipe joint, over the edge formations at the ends of the arcuate parts remote from the hinge.

Abstract: A pipe union and compound seal has a first pipe member with a central passageway, a sealing surface and a flange with a shoulder. The union has a fastening member adapted to slide around the first pipe member. The fastening member has a matching flange to abut the first pipe member's flange and has threads formed along the inner surface of the fastening member. A second pipe member has a matching central passageway and threads formed along its outer surface to receive and engage the fastening member's threads. The second member has a face opposing the first pipe member's sealing surface with a trough in the face for receiving and retaining the compound seal. The compound seal is positioned in the trough and in a first embodiment has a central spring and a U-shaped outer shell surrounding the spring. The open end of the shell is disposed radially inward so that increased pressure within the central passageways increases the sealing engagement between the shell and the pipe union.

Abstract: An elastomeric sealing ring is provided for sealing an end of a pipe unit of the kind comprising a pipe, heat-insulating foam material surrounding the pipe and an outer tubular jacket and in which the pipe projects beyond the ends of the foam material and the jacket projects likewise, but for a shorter distance. The sealing ring is of U-section with a radially disposed base and inner and outer coaxially projecting flanges and has an annular groove formed in the base and extending into the outer flange. In use, the inner flange tightly surrounds a respective pipe end part of the pipe unit, the base is either seated against or spaced from the corresponding end of the foam material and the corresponding jacket end part extends into the annular groove.

Abstract: A conduit coupling assembly having a hub, elastomeric seal, and retainer ring for fastening and sealing a conduit which is inserted into the coupling assembly. The retainer ring has a contoured portion that aligns the conduit prior to its engagement with the seal. The seal has plural exterior, peripheral ribs that are compressed against the hub interior when the conduit is inserted. The compressed, peripheral, exterior ribs prevent leakage between the seal and the hub. The seal has an interior truncated, conical sleeve portion that stretches around the conduit as it moves into the coupling assembly creating an interference fit. The conical sleeve portion yields as the conduit first enters the coupling assembly to provide easy initial insertion. Interior peripheral ribs are formed on the seal which are compressed by the conical sleeve portion. Inserting of the conduit into the coupling causes radial outward movement by the conical sleeve.

Abstract: A leak repair clamp for pipe and pipe flanges includes a frame having a plurality of segments positionable in end-to-end relation around the pipe. Each segment includes spaced parallel annular lips flaring from its inner periphery with each lip being an integral part of the segment and having a bent tip portion extending toward the matching oppositely positioned tip portion of the opposite lip. A connecting means is used to connect the segments together in end-to-end relation, the lips extending from the segments to thus form an annular recess around the pipe when the segments are connected. An access means is provided in the frame to permit passage of a liquid sealant into the recess and the lips direct flow of the sealant into direct contact with the pipe to form a self-energizing seal between the lips and pipe.

Abstract: The invention provides a coupling for releasably securing one end of a rod-like member. To this end a body is dimensioned to receive the rod end and support a locking element. The locking element is displaceable with respect to the body to engage the rod end and is associated with rotatable camming means. Partial rotation of the camming means imparts a camming action to force the locking element into locking engagement with the rod end and further rotation of the camming means withdraws the element to unlock the rod end. The locking partial rotation of the camming means is through an arc of substantially 90.degree. and the unlocking further rotation is through a similar arc in the same or the opposite direction.

Abstract: This invention provides a pipe tapping band of the type formed in two halves adapted to be clamped about a pipe to be tapped, one band half having an internally threaded integral ferrule to receive conventional pipe tapping means, a recess in the inner surface of the tapping band around the ferrule aperture, said recess arranged to receive and locate an apertured resilient seal between the tapping band and the outer surface of the pipe about an aperture formed therein and with said seal having peripheral lips arranged to provide sealing engagement with the tapping band and the outer surface of the pipe about the aperture therein.

Abstract: The invention provides a junction coupling for branching a flow of fluid from a pipe or conduit. The junction coupling is essentially C-shaped and is dimensioned partly to surround such pipe or conduit. Opposite limbs of the C-shaped member carry, on the one hand, an outlet duct and on the other hand means for securing the coupling in position on the pipe or conduit. The outlet duct is alignable with an aperture in the conduit wall and adapted to receive a branch conduit. The dimensions of the C-shaped member are such that the coupling may be engaged over the pipe or conduit only at the location of the aperture therein.

Abstract: A pipe coupling, e.g. for use in irrigation pipelines, having releasably connectable male and female coupling coupling elements which are connected so as to be able to swing relative to each other about either or both of two axes extending transversely of the coupling elements and perpendicular to each other, whereby the elements are free to undergo universal relative angular movement when attached together. For this purpose one element is encircled by a loosely fitting ring, pivotally connected to that element by lugs at two diametrically opposite positions, and the other element has a pair of hooks, at diametrically opposite positions, which releasably engage sockets on the ring which lie on a diameter of the ring perpendicular to a diameter on which the lugs lie. The lugs may engage a pair of diametrically opposite seats on the one element, or an annular track in which case the couple elements are free to undergo relative rotation as well as relative angular movement.

Abstract: A female pipe joint end 3 has a circular groove 11 and a rectangular circular groove 9 in its expanded inner periphery, and a mating male pipe joint end 6 has a tapered insertion edge 5 and a circular groove 7 in its outer periphery. The side wall of the groove 7 nearest the pipe end is perpendicular to the pipe axis; the opposite side wall is tapered. A packing seal 10 is disposed in the groove 11, and a continuous, relatively rigid locking ring 4 of synthetic resin is disposed in the groove 9 and snap fitted into the groove 7 during assembly. The ring 4 may have a bevelled lip 13, stepped inner and outer peripheries 15, 16, 17, or axial grooves 14 or holes 14' therethrough.

Abstract: A means and apparatus for connecting resilient conduit is provided in which a first section of resilient tubing of internal dimensions sufficient to slide over the conduits and having two grooves, one spaced from each end of the internal surface of the section with each groove containing resilient gasket material substantially filling the groove to form a gasket around the conduit is slid into place so that the conduits to be connected are juxtaposed within the first section of tubing between the gasketed grooves. An encasing tubing is placed around said first section of tubing at least overlying the resilient gasket material. A pair of split metal clamping rings with one ring adjacent each end of the first tubular section and joined by a plurality of spacer bars united at each end to the clamping rings is fitted over the encasing tubing in relation to apply pressure on the encasing tubing when the split rings are united in clamped position.

Abstract: Resilient O-ring seals for caps for closing vehicle fuel tank filler necks, the fuel caps having shank portions extending into the necks. The radial width of the annular space between the inner wall of such a neck and the outer wall of the shank is less than the radial dimension of the O-ring. Each O-ring includes an annular, radially outwardly facing groove defined by an axially inner lip, an axially outer lip, and a connecting web portion. As the shank with the O-ring thereon moves axially into the neck, the axially inner surface of the inner lip contacts the neck and is urged axially outwardly in a wiping action causing bending of the O-ring such that its radially inner surface is resiliently urged radially and compressively to seal the annular space. In one embodiment, the inner surface of the outer lip contacts the neck as the shank and O-ring are projected further into the neck. The outer lip of the O-ring thereby axially compressively seals the space.

Abstract: A fitting piece for connecting rigid or flexible tubes which are made particularly from plastic, the fitting piece having an opening to receive therein the tube and being provided with at least one inwards protruding annular rib having edges, preferably sharp edges, the cross-section of said rib being formed in such a manner that a straight line interconnecting the center point of the basis to the peak of the cross-section is inclined to the axis of the tube-receiving opening by an acute angle with its vertex pointing to the interior of said opening, said fitting piece being characterized in that at least the annular rib and preferably the whole of the fitting piece is made from an elastically deformable plastic material whose coefficient of elasticity amounts to at least 20,000 kgf per cm.sup.

Abstract: A unitary fitting for fluid piping systems. A body has a socket member, and a hub member fits in the socket member. The members define the bottom and sides of a ring groove, and a resilient sealing ring fits in the groove. Each of the members has a wall which is adapted to be brought into abutment with the other, and a structural joinder joins the walls. A preferred means to form the structural joinder is to rotate the hub member in the socket member while the walls are in abutment, whereby the frictional forces will generate sufficient heat to cause the walls to fuse together, especially when they are formed of a thermoplastic plastic material, such as polyvinyl chloride.

Abstract: This invention relates to a pipe joint for the butt jointing of pipes in the form of a sleeve to receive the respective pipe ends and provide a resilient seal between the sleeve and the pipe surfaces, said seal having peripheral lips adapted to effect an increase in sealing engagement by fluid pressure in the pipes.

Abstract: A pipe fitting characterized in that a press ring is fitted around the external surface of a pipe made of an elastic material, another pipe to be joined is inserted into said pipe, reducing the diameter of said press ring from outside, and at the same time causing to bulge out a part of said press ring whereby said pipe and the other pipe are pressedly joined.

Abstract: A joint assembly connected with one end of a heat insulated conduit which includes an outer casing, a concentric inner core and an intermediate concentric layer of insulation material is disclosed herein. This assembly defines a passage extending from the conduit core outwardly to the outer surface of the joint assembly. This passage is provided such that fluid therein and under a predetermined amount of pressure in the direction towards the outer surface of the assembly will move out of the passage in the direction of pressure, i.e., to the outer surface of the joint assembly rather than into the layer of insulation material comprising part of the conduit.

Abstract: Apparatus for connecting the ends of two pipes comprising; a pair of coupling members, each of which is connected at one end thereof to the end of one of the pipes; one of the coupling members having attached to the other end thereof an annular spherically-shaped enlarged portion having axially forward and rearward sides; the other coupling member having attached to the other end thereof a housing having an internal surface for receiving the spherically-shaped forward side of said enlarged portion in mating engagement therewith, thereby enabling the central axes of the coupling members to be inclined at an angle relative to each other for connecting similarly inclined pipe ends; seal means disposed between the enlarged portion and the housing for providing a fluid seal therebetween; a plurality of cam members supported in circumferentially disposed relation about the housing and movable axially and radially inward towards the internal surface between a retracted position in which the housing freely receives t

Abstract: A coupler for effecting hermetically sealed pipe or conduit interconnection by slip fit and without the use of tools. A coupler body member and a screw-on nut compress therebetween the outer marginal frusto-conical portion of a spring metal locking ring having arcuate segments directed angularly inwardly of the slipfit opening and defining a circle of slightly greater diameter than that of the pipe to be connected before the locking-ring is compressed in place, and slightly lesser in diameter than that of the pipe to be connected when the locking-ring is compressed in place. Pipe disconnect is accomplished by unscrewing the nut, which permits the locking ring to again assume a configuration wherein the arcuate segments define an opening of sufficiently greater diameter to permit withdrawal of the pipe.

Abstract: Branch pipes are secured to main pipes mechanically by means fitted about the main pipe at a hole in the pipe wall. Two sections of the outlet contact the main pipe around its entire circumference, and either or both sections can have a spigot for fitting within a hole through the pipe wall to align the branch accurately. The housing sections have means for easy bolted assembly and for accurately positioned reception of a pressure sensitive gasket.

Abstract: A swivel joint for pressure containing conduits such as movable flow lines may comprise a pair of hub elements each having means establishing interconnection with a section of flow line, the hub elements being abutted in such a manner as to define a flow passage through the swivel joint construction. A thrust flange is formed on each of the hub elements, the flanges being retained within a split housing structure that services to retain the swivel joint in assembly. Rotatable relationship between the hub elements and the body structure is established by a pair of thrust bearings that are interposed between the housing and the respective thrust flanges of the hubs. A lubricating spacer element may be disposed between the thrust flanges of the hubs to prevent the development of friction retardation of swivel movement. The hubs interfit to define a sealed recess within which is received a seal sleeve that is of sufficient length to transition the joint between the abutted hubs.

Abstract: The specification discloses an end fitting for a tubular hose which fitting comprises a rigid tubular insert to be inserted within at least one layer of the hose, a ferrule to surround at least a portion of the insert to grip the said layer of the hose between the ferrule and the insert, an annular sealing member of resilient material, for example rubber or soft thermoplastic, having a first annular lip to make a lip seal with an inner wall of the hose and a second annular lip to make a lip seal with an annular surface on the insert and spring means to maintain the lips in initial contact with the hose and the insert until sufficient pressure builds up in the hose to form lip seals between the lips and the hose and the insert.

Abstract: Each section of an intermediate metal conduit with a constant diameter axial passageway has male pipe threads formed on its outer wall surface at one end. The other end of each conduit section has a short length of decreased outside diameter extending axially inwardly from the flat end face of the section, to form an external annular stop shoulder. A coupling sleeve has a pair of annular flanges which define central openings in mutual axial alignment but of different diameters such that the coupling sleeve may slide freely to a limited extent over the full external diameter of said other end of the conduit section. The coupling sleeve is retained captively on this other end by a resilent constrictable lock ring positioned in an annular lock ring groove disposed axially inwardly of the stop shoulder. When the coupling ring is unstressed, it protrudes, in part, radially outwardly of the groove and is in the path of movement of one of the flanges. The coupling sleeve can be retracted, i.e.

Abstract: For detachably holding a lance in axial alignment with the mouth or top opening of a metallurgical furnace, use is made of a chuck through which the lance can be inserted upwardly for communication with an outlet conduit extending downwardly from a vessel defining a pressure-tight air or oxygen chamber therein. A packing box supported under the outlet conduit houses means for establishing pressure-tight communication between the lance and the outlet conduit. The vessel, the packing box and the chuck are all bracketed to a carriage movable along a vertical track for causing up-and-down motion of the lance into and out of the furnace mouth. According to another embodiment of the invention, means are further provided for rotating the lance while the latter is inserted into the furnace.

Abstract: A composite seal for joining a down flow drain pipe to a shower pan has a drain fitting provided with a tapered rim overlying the shower pan and a packing nut for holding it in place. A flanged lower portion of the fitting forms an annular pocket around the drain pipe in which a series of three rings are stacked. The center ring has normally diverging annular sections which are forced together between the pipe and the flanged portion of the fitting thereby to seal the assembly.