Abstract: A pipe coupling having an elastomer sealing sleeve which is approximately C-shaped in cross-section has a cylindrical housing which is split in the longitudinal direction, and which defines inwardly bent end walls and can be constricted like a pipe clip by means of a closure having tensioning screws, in which arrangement the sleeve, which is enclosed at the end faces and at the circumference by the housing and by a metal insert sheet bridging the housing gap and is approximately C-shaped in cross-section, is compressed in the circumferential direction and is brought to bear against the pipes to be coupled. Sliding rings, which are compressible in the circumferential direction, are located between the end faces of the sleeve and the end walls of the housing. Upon assembly of the coupling, these sliding rings are brought to bear against the outer walls of the pipes and form a sliding seat with the latter.

Abstract: A pipe coupling includes a contractible housing 10, which receives an elastomer sealing sleeve 32 of C-shaped cross section, having sealing lips 36 extending towards each other. A meander-like spring ring 44, which is U-shaped in cross section and is provided with slots 74, is inserted in to the respective annular groove 42 in order to support the sealing lip 36 against the sleeve bar 34. Upon the contraction of the housing 10, the sleeve 32 is upended in the peripheral direction and the sealing lips 36 are brought to bear snugly against the pipe wall 55. At the same time, the spring ring 44 contracts as a result of a decrease in the width of the slots 74. The sealing lip 36 is supported by the spring ring 44 over a large area, and the flowing of material of the sleeve 32 in and through the slots 74 is prevented. The spring leg 68 projecting over the sealing lip 36 prevents any sticking of the torus 56 to the sleeve bar 34.

Abstract: A pipe coupling gasket insert is provided for optional use within a conventional C-shaped in cross-section, resilient gasket which is fitted within a conventional rigid C-shaped in cross-section coupling formed for encircling and coupling together the end portions of a pair of co-axially arranged, adjacent pipe end portions. The gasket has band-like lips formed on its inner portions for encircling and engaging the surfaces of the respective pipe end portions with the lips having free edges that are spaced apart. The pipe ends are slightly gaped apart. The insert, form of a resilient ring, is manually positioned within the gasket, for engaging the base of the C-shaped gasket, and has a radially inwardly extending rim that extends between the free edges of the gasket lips for engaging the end portions of the adjacent pipes and spanning the gap therebetween. The insert rim portion may be shaped to extend into gap or over the gap for sealing the gap between the adjacent pipe ends.

Abstract: A roll grooved pipe is provided on its inner surface with a hydrofoil surface providing a transition between the inner surface of the pipe and the radially innermost portion of a radially inwardly extending step formed in the inner wall of the pipe by the cold rolling of the groove in the pipe.

Abstract: A pipe coupling is provided having a pair of arcuate housings each provided with a crescent groove and a crescent protrusion formed on an abutting end surface of the arcuate housings in the positions which is symmetrical to each other around a vertical axis and is offset from a transverse central axis. When the arcuate housings are tightened by bolts and nuts, the crescent protrusion is inserted into the crescent groove, thereby causing skewed movement of the arcuate housings around the vertical central axis of the pipe coupling in adverse directions to the predetermined angular positions. Thus, upon completion of tightening by the bolts, excessive tightening by the bolt is prevented due to mutual contact of the abutting end surfaces of the arcuate housings.

Abstract: A pipe coupling comprising a sealing gasket to fit over adjacent ends of pipes to be connected end-to-end and a housing which clamps around the gasket, has the housing in the form of a cast metal or alloy band which substantially encircles the gasket and has at its circumferential ends opposed lugs between which a wedge portion of the gasket extends and which are connected by at least one clamping bolt engaged with retaining means, whereby the lugs can be urged towards one another to contract the band onto the gasket. The lugs grip the wedge portion as the band is contracted and prevent the body of the gasket from bulging outwardly between the lugs. Preferably the band is made of a ductile metal or alloy, e.g. ductile iron, and is slightly oval in its free state so that it assumes a substantially true circular form when fully contracted onto the gasket.

Abstract: A pipe coupling has a housing which is split in a longitudinal direction and has inwardly bent end walls and a steel insert sheet of analogous design bridging the housing gap. With the aid of a closure with tensioning screws, the housing can be constricted in the manner of a pipe clip. A sleeve, enclosed at the end faces and the circumference by the housing and a steel insert sheet, and roughly C-shaped in cross-sectionis compressed in the circumferential direction and is brought to bear on the pipe wall. As a result of inherent recovery capacity, an annular insert, flexible in the circumferential direction but rigid transversely thereto, bears on the sleeve web and thereby holds the sleeve web in surface contact with the housing even when the coupling is pressure less. In combination therewith, sliding rings are preferably located between the end faces of the sleeve and the end walls of the housing, which sliding rings close the annular gap remaining between the end walls of the housing and the pipe wall.

Abstract: A lined pipe has a continuous impervious coating of an elastomer extending along the inner periphery of the pipe and along the radial end surfaces thereof, and a portion thereof extending over the outer surface of the pipe which progressively decreases in thickness to zero thickness at a position underlying a sealing lip of an elastomeric gasket to be associated with the lined metal pipe.

Abstract: A quick coupling for plastic pipe in which the ends of each plastic pipe are fitted with a metallic sleeve. The metallic sleeve is contoured with a hollow boss at one end and spaced apart from the boss is a radially extending circular groove. The metallic sleeve may be counterbored. The metallic sleeve may be embedded in the plastic pipe end by various heat forming techniques. Further, the plastic pipe may be internally threaded. Then a hollow plug of the same plastic as the pipe with external threads at one end is contoured to form a collar with the face of the unthreaded end. The collar is recessed to receive the boss. The metallic sleeve is fitted over the threads and seated with the boss in the recess of the collar. The plastic plug is then threadably engaged in the end of the plastic pipe and sealed with an o-ring. Two pipes, each having a metallic sleeve thereon, when aligned are coupled together by a mechanical clamp having keys which fit the circular groove of each pipe.

Abstract: A pipe coupling has a cylindrical housing which is split in the longitudinal direction and has inwardly bent end walls and a steel insert sheet of analogous design bridging the gap in the housing. With the aid of a closure with tensioning screws, the housing can be constricted in the manner of a pipe clip, such that a sealing sleeve positioned between the housing and a pipe is compressed in the circumferential direction and brought to bear on the pipes to be sealed off. The closure is offset in the circumferential direction with respect to the housing gap, and the end section of the housing projecting through the region of the tensioning screws is overlapped by a slideway anchored on the other end section. By this means, dimensional stability is increased without increasing the wall thickness, or the constrictability of the housing is guaranteed despite an increased wall thickness.

Abstract: What has been described in its simplest form is a coupling segment, which when used in conjunction with a like coupling segment, provides a coupling for use in securing the juxtaposed ends of pipe, such pipe having grooves encircling their ends. There is also provided a coupling for the holding of pipe ends and a method of securing pipe to form a pipeline.

Abstract: A connector for smooth pipes characterized by having one of the ends of the sleeve (3) equipped with a peripheral housing (4) receiving locking rings for fixing the connector securely on one end (1) only of one of the pipes to be connected, the end of the other pipe (2) being able to slide freely in the sleeve (3) while being in contact only with the corresponding lip (15) of the joint (13).

Abstract: Each half of a bifurcated circumferential clamp includes a pair of spaced apart internally oriented semicircular ridges for engaging grooves formed at the end of abutting pipes. Teeth extending adjacent the ridges penetrate the groove walls to physically lock the clamp with the pipes. A circular gasket bridging the abutting pipes and held in place by the clamp seals the junction between the pipes.

Abstract: A metal seal has features that make it particularly useful for wide temperature variations of the fluid flowing through the conduits that it seals. The seal ring locates within a groove in the face of each conduit. The seal ring engages the outer wall of the grooves. The seal ring has inner legs that engage the inner wall of the grooves. The legs are separated from a mid-section of the seal ring by a slot. The radial width of the seal ring is greater than the distance radially across the grooves so as to provide an interference fit. The deformation of the seal is elastic, not permanent. The sealing surfaces are cylindrical or conical. The seal is not axially compressed.

Abstract: A resiliently flexible pipe coupling for interconnecting two pipe ends in a pressure-tight manner includes a tubular sealing sleeve of resilient flexible material, and an adjustable tubular metal casing for clamping the sealing sleeve around the pipe ends. The sealing sleeve includes a tubular web portion and sealing lips integral with the web portion. The sealing lips are formed in adjoining relationship relative to the web portion and define free ends of the sealing sleeve. The sealing lips extend radially inwardly from the web portion and are spaced apart longitudinally. Each sealing lip includes a radially inner pipe-engaging surface for engaging one of the pipe ends, and the pipe-engaging surface of one of the lips has a substantially different internal diameter from the pipe-engaging surface of the other lip, whereby the coupling is adapted to connect two pipe ends of different external diameter.

Abstract: A pipe for conveying solid matter, particularly for conveying concrete. The pipe has a cylindrical middle portion and a double-layer welding neck with annular coupling flange at each end of the middle portion. The inner layer is replaceably clamped in the outer layer in a positively locking and frictionally engaging manner. This is accomplished by a roof-like bevel of the inner layer which is engaged by a corresponding inner groove of the outer layer which is of limited elasticity. The inner diameter of the inner layer may be smaller than the inner diameter of the cylindrical middle portion.

Abstract: A pipe connector for connecting a pair of conventional, circular cross-section pipes whose axes are generally coplanar but are angled relative to each other, is formed of a pair of identical, but reversely arranged, tubular sections, each having an outer end for coupling to an adjacent pipe end and an inner end coupled to the adjacent section inner end. The coupling comprises conventional, releasable, circular pipe couplings which surround and clamp adjacent pipe ends together. The connector sections are bent and flattened in cross-section so that their inner ends are engaged in the plane of the pipe axes while their outer end openings are transverse to the pipe axes and overlap and open into the ends of the pipes. The portions of the connector sections between their opposite ends are of cross-sectional areas that are roughly the same as the cross-sectional areas of their end openings.

Abstract: A novel terminal outlet fitting for use in sprinkler systems with a standard split-sleeve sealing coupling engaging the fitting and a standard grooved end pipe, in order to provide an oriented pressure outlet to which a sprinkler head may be fitted. The fitting provides a high efficiency low pressure drop, streamlined flow so that effective sprinkler discharges is achieved. The process avoids the previously labor intensive high cost welding attachment of a connection outlet over a hole drilled through the pipe wall, characterized by poor flow characteristics, and the need to provide a separate pipe end closure and effects a material saving in piping. The novel fitting and its method of use effects significant direct cost savings, in material and on-site labor, and provides a more effective sprinkler system.

Abstract: A pipe coupling for encircling and coupling aligned pipe ends is formed of aligned arcuate segments that are fastened together. The segments are hingedly connected together at adjacent ends by means of a hook formed on the end of one segment and a hook receiving loop formed on the corresponding end of the other segment. The loop forms an elongated rectangular opening defined by a pair of radially outwardly extending legs, that are joined to the segment and an axle connecting the legs. The hook has a similar cross section, but is loosely fitted within the opening. A depression is formed in the axle, at one leg, and a correspondingly aligned depression is formed in the segment wall adjacent the opposite leg. The hook has a projection which normally prevents the hook from withdrawal from the loop opening when the hook is pivoted relative to the opening.

Abstract: A coupling for either rigidly or flexibly connecting the adjacent ends of a pair of aligned pipes, is formed of a circular casing made of a pair of aligned, semi-circular segments which surround a resilient pipe gasket. The opposite ends of the segments have radially outwardly extending lugs which form pairs of overlapping fastening lugs. The lugs of at least one pair each have transversely aligned bolt holes and opposed sockets that are generally concentric with the bolt holes and open towards each other. A bolt extending through the sockets and bolt holes fasten the lugs together and cause the segments to clamp radially inwardly towards the pipes for coupling the pipes together with some permissible flexibility of relative movement. A plug having opposite end portions and a central bolt hole is removably fitted within the opposed lug sockets, with the bolt extending through its central bolt hole.

Abstract: This invention relates to a pipe coupling and, in particular, to a Victaulic-type coupling which generally comprise a pair of half shells, together forming a sleeve which can be placed around adjacent flanged or grooved ends of a pair of pipes which have been located in co-axial end to end relationship for joining. The pipe coupling of the invention comprises a pair of discrete, substantially identical half shells which are engageable with one another to form a coupling sleeve. The half shells each include a hook formation on one end thereof which is interengagable with the hook formation of the other half shell, partly to secure the half shells to one another.

Abstract: A circular pipe coupling for coupling aligned pipe ends is formed of arcuate segments arranged end to end. Each segment has outwardly extending lugs formed on its opposite ends, with the lugs on the adjacent segment ends being interconnected. One of each pair of interconnected lugs is formed with an integral hook, with a corresponding opening for receiving the hook formed on the opposite lug and providing an axle upon which the hook is engaged to form a hinge connection, except that one of the pairs of lugs is connected together by a manually releasable mechanical fastener, such as a bolt. One of the segments may be manually positioned upon the adjacent pipe ends to be coupled, with one or more segments freely dangling downwardly therefrom under the force of gravity, which sections may be manually pivotal upwardly for encircling the pipes and for applying the releasable mechanical fastener.

Abstract: Coupling segments of a segmented pipe coupling have dissimilar ends that are interfittable with ends of an identical said coupling segment in only one specific orientation of said coupling segments, and which are antagonistic to the interfitting of said ends of said coupling segments in all other positions of orientation of said coupling segments.

Abstract: A gasket for use in a segmented pipe coupling has portions at its ends of greater radius than the radius of the portion intermediate the ends, thus enabling the pipe coupling to be applied to a pipe in the absence of lubricants.

Abstract: A pipe coupling is formed of a pair of similar semicircular segments of a preselected diameter which are fastened together by separate, standard-size, length-adjustable fasteners to form a predetermined diameter circular casing for surrounding and connecting adjacent, axially aligned pipe ends. Each segment has radially arranged, opposite end faces which abut the corresponding end faces of the other segment to form a pair of diametrically aligned junctures. Depressed sockets are formed in the exterior, peripheral surface of each segment near the junctures. Each fastener is formed of an internally threaded tube having an end portion telescopically fitted within a tubular barrel, with a screw having a head engaged against the free end of the barrel and a shank extending through the barrel and threadedly engaged within the tube. The laterally extending teeth which are formed on the tube and barrel fit into the sockets on opposite sides of each juncture.

Abstract: A coupling construction includes a plurality of coupling segments which are receivable in substantially end-to-end encircling relation around the end portions of a pair of grooved pipe sections and a plurality of nut-and-bolt assemblies for securing the coupling segments together. The coupling segments include arcuate main portions, apertured flanges which extend outwardly from opposite ends of the main portions and spaced first and second ridges which extend inwardly from the inner sides of the main portions and are receivable in annular grooves in the pipe sections. The apertures in adjacent flanges are offset from each other in a direction substantially parallel to the Z--Z axis of the coupling so that tightening of the nut-and-bolt assemblies causes adjacent flanges to be drawn into predetermined offset positions before the end faces of the coupling segments are drawn into engagement.

Abstract: A standard pipe coupling is formed of two, semi-circular segments that are bolted together to form a circular casing which surrounds the adjacent, axially aligned, end portions of two pipes to be connected. The casing is U-shaped in cross-section to form an exterior base and radially inwardly directed legs which are of substantially equal length. The radially inner edge portions of the legs form continuous, annular, narrow tenons which normally fit into annular grooves formed in the exterior surfaces of the pipes for interconnecting the casing and substantially equal diameter pipes. A diameter reducing insert comprising a flat, thin, segmented ring whose outer peripheral edge is formed with a continuous groove is arranged coplanar with one of the legs, and with its groove receiving the tenon of that leg.

Abstract: A pipe union for joining two pipe ends in an end-to-end relationship. On each pipe end a flange, at least one clamping element, and one chamber element are fitted , which can be braced against one another and which among them enclose a shaped seal, each of whose two axial ends protrudes into a respective adapted recess of the chamber elements covering the seal. The seal is an outer elastomer ring supported on the jacket faces of the two pipe ends and has a central annular groove open to the inside. An inner ring that overlaps the butt joint is loosely pressed into this central annular groove. The clamping elements are supported with a radially inwardly located clamping rim on the associated pipe end, and with a radially outwardly located clamping rim on a clamping face disposed concentrically with respect to the pipe ends.

Abstract: A hingeable segmented pipe coupling includes dual or plural coupling segments which are hingeable relative to each other in the absence of transverse hinge pins, at least one pair of bolting pads including arcuate surfaces which roll with respect to each other, and each of which includes a fulcrum for engagement with a headed securing member associated with those bolting pads. In preferred embodiments, the bolting faces of the bolting pads are contoured to prevent rotational movement of the coupling segments about the axis of the securing member.

Abstract: An elastomeric seal for incorporation into a pipe coupling includes a fire-ring which acts to retain a residual portion of a radial flange of the seal in sealing relationship with the pipe ends in the event of thermal destruction of the remainder of the seal.

Abstract: An elastomeric gasket for a segmented pipe coupling has ends which extend beyond the ends of the coupling segment, and which are retractable into skirt portions of the gasket formed at the respective ends thereof, the compressive force exerted on the end faces of the gasket being derived from the spring force stored in the gasket material when under compression and being substantially constant without regard to oversizing or undersizing of the pipes to be sealed.

Abstract: A resilient flexible pipe coupling for interconnecting two pipes of different diameters in a pressure tight manner comprises a tubular metal casing formed with a longitudinal gap and a tensioning screw device for reducing the width of the gap to tighten the coupling around the adjacent ends of the two pipes. A sealing sleeve of resilient flexible material is arranged within the casing. The sleeve has radially inwardly projecting sealing lips formed on both of its free end. The sealing lips have different radial thicknesses so as to compensate for the difference in diameters of the pipes.

Abstract: A pipe coupling comprising a housing which can be clamped about pipe ends which are to be interconnected possesses radially inwardly flexed end flanges. The housing encloses an inwardly open sealing gasket having a substantially C-shaped axial cross-sectional configuration made from an elastomeric material such as synthetic rubber. Both ends of this sealing gasket are supported upon the inner or confronting jacket surface of a respective truncated cone-shaped clamping ring. These clamping rings are supported in the housing at the region of their outer edge or outer region by means of the end flanges. The inner edge or inner region of these clamping rings is structured to mechanically engage or dig into the surface of the pipe ends during clamping of the housing.

Abstract: Pipe coupling apparatus including a tubular female coupling structure and a tubular male coupling structure sized to fit within and mate with the female coupling structure, one coupling structure including a housing and a locking ring that is radially deformable within an annular supporting groove of the housing, the other coupling structure including a tapered surface for biasing the ring to vary its radius as the coupling structures are brought together and an annular locking groove for receiving the ring when it is aligned with the locking groove as the coupling structures are moved further together and the ring springs back toward its undeformed shape, one coupling structure carrying an annular seal to provide a fluid-tight seal between said coupling structures.

Abstract: A seal assembly for incorporation into a pipe coupling has a fire-ring which is adapted to seal against the juxtaposed ends of pipes and provide a substantial seal between the pipe ends in the event that the body of the elastomeric seal is subjected of thermal destruction.

Abstract: A concrete pumping pipe coupling operates at nominal pressures of 2,000 psi and momentary peaks in excess of 3,000 psi. A two-piece hinged coupling forms a cylindrical enclosure encircling adjacent pipe ends. A two-piece latch releasably interconnects the ends of the two coupling sections. The latch includes a lever pivotally mounted to a link which is pivotally connected to the one coupling section. The lever pivots on a cam member connected to the other coupling section. The link includes a bolt threaded into an elongated nut. The threaded connection is for varying the length of the link. The elongated nut has an annular inner groove with a stop wall at each end. A spring-loaded limit pin is slidably mounted in a blind hole in the bolt and projects into the recess. The stop walls in the nut limits the movement of the bolt from the nut and thereby the extension of the link.

Abstract: A pipe coupling for coupling together pipe ends of pipes to be interconnected comprises a clampable housing approximately in the shape of a tightening clamp or collar for being clamped about the pipe ends such that tightening of the clampable housing causes the housing to contract or draw together around the pipes to be connected. The housing possesses annular or ring-shaped, inwardly flexed flanges at its end faces. A sealing gasket made from an elastic material such as synthetic rubber is enclosed in the housing and possesses a substantially C-shaped axial cross-sectional configuration. Clamping rings provided on the inner sides of the sealing gasket are capable of being reduced in diameter and supported in axial direction on the housing. These clamping rings are provided on their inner surfaces with claws or claw-like elements.

Abstract: A method of assembling a pipeline system and the pipeline system resulting therefrom involves providing pipes and associated conduit members with plural axially spaced key engagement members adjacent the ends thereof, and securing adjacent ends of the pipes and conduit members to each other using segmented couplings having plural axially spaced keys corresponding with the key engagement members, the engagement surfaces of the keys having an inversely pebbled surface produced in the casting of the segments of the coupling and which is intentionally left unfinished, such that pressurization of the pipeline system and the axial loading produced thereby will cause the inversely pebbled surfaces of the respective keys to crush down and cold work the engaged faces of the engagement members to progressively produce substantially uniform stress distribution between the respective keys and engagement members.

Abstract: A closure and locking device for a pipe coupling includes lugs on the juxtaposed ends of coupling segments that interfit and can be locked in a closed position by a locking pin. The lugs each provide reaction members which are employed in the pressure loading and closing of the coupling against the bias of a resilient sealing gasket contained within the segments of the coupling, with the closing accomplished with the aid of a tool which is removably engagable with the lugs of the coupling.

Abstract: A device for coupling two pipe sections together such that each of the connected pipe sections may swivel relative to the other. Each of the pipe sections have uniform and equal exterior diameters into which circumferential grooves, preferably a pair, are formed. The pipe sections are held together by a split clamp having inwardly extending ribs which mate with the grooves formed in the pipe sections. The size of the pipe section grooves and the split clamp ribs provide an annular space in each groove inwardly of the split clamp rib in which resides a compressible bearing ring. A washer ring separates and seals between the ends of the two pipe sections. The resulting pipe coupling is largely symmetrical about both its radial and axial centerpoint planes. Under pressure, the load is equalized over the multiple bearing rings.

Abstract: Segments of a coupling for use in a high-pressure piping system are provided with cast multiple keys in their as cast condition, and which are for reception within corresponding plural or multiple grooves in pipe ends, crushing of the operative faces of the keys and cold working of the faces of the pipe grooves in engagement therewith providing for equalization of the axial loading imposed on the respective keys.

Abstract: A quick-connect coupling is disclosed for thin-walled pipes which can accommodate pipes of the same internal diameter but of differing wall thickness, the coupling member being constructed to deform pipes of less than maximum wall thickness into a substantially elliptical condition in which the coupling is fully seated, bolting pads of the coupling being spaced from each other to induce deformation and seating of the pipes upon tightening of the coupling.

Abstract: According to the present invention, a coupling member assembly is provided which is of multiple-part construction, and which includes an inexpensive and readily replaceable conduit member formed from an abrasion resistant material, the conduit member being supported substantially throughout its entire outer surface by two or more rigid coupling member sections which are bolted or otherwise secured to each other, and, which provide the major structural strength of the coupling member assembly.

Abstract: A coupling assembly for coupling an elongated cylindrical element such as a pipe section or shaft to a second element such as another pipe section or shaft. A shallow circumferential groove is formed on an outer circumferential surface of the cylindrical element at a position spaced a moderate distance from the end at which the coupling is to be made. At least one split ring mounted in the groove and has an outer circumferential portion tapering inward from a center line toward the back of the ring. A generally hollow cylindrical housing is mounted over the split ring and has a tapered inner surface portion contacting at least a portion of the tapering outer surface of the split ring. A fastening arrangement draws the housing toward the other element to force the tapered inner surface portion of the housing into contact with at least a portion of the tapering outer surface portion of the split ring.

Abstract: An air fluid check valve for assembly into the interior of a pair of generally axially aligned conduit sections at a separable joint thereof, for use for instance on a bulk hauling transport trailer adapted for handling powdered solids, such as for instance flour, or cement, or like product. The air valve comprises a valve body which is adapted to be readily inserted into and removed from the separable conduit joint, and in one embodiment has a radially extending rim at one end thereof for locating the valve in the interior of the conduit sections at the joint thereof. In another embodiment, bolts connecting flanged portions of the conduit joint, coact in juxtaposed condition with the valve body to locate the valve in proper position at the conduit joint.

Abstract: A swivel coupling apparatus includes a pair of aligned metal pipe sections having grooved outer ends for connecting to hoses and rigid pipes by releasable clamp units. A gasket is disposed between the smooth end faces and an outer clamp housing encircles the end portions to mechanically connect the pipe sections. The pipe sections have outer shoulders with inclined clamp walls. The clamp housing includes a pair of semi-circular members having bolt clamping lugs for drawing the members onto the shoulders. The members having outer side clamp legs defining a cavity. A central rectangular spacer projects partially into the cavity for location between the outer portion of the end faces. The cavity has annular base walls between the spacer and side legs aligned with and outwardly spaced from the outer peripheral walls of the shoulders. Grease fittings to the opposite sides of the spacer provide for introducing of grease into the free space. The spacer has a smooth inner wall forming a backing for the gasket.

Abstract: This invention relates to a method for coupling or joining pipes and tubes wherein an elastic force stored in said elastic coupling perpetually exerts a force that maintains a leak-proof connection between two ends of the pipes or tubes. Said elastic coupling comprises a plurality of the segments of an elastic ring having a cross section of annulus with an opening on the inward side of said elastic ring and a clamping collar of annular geometry with a groove on the inward side of said clamping ring, in which groove said plurality of the elastic ring segments are disposed in a confined fashion. The rims of two matching flanges built on each end of two pipes or tubes to be connected are received by said plurality of the elastic ring segments through said openings of the elastic ring segments.

Abstract: A split collar for use with pipe and the like including a pair of discrete semicircular collar halves each having outwardly extending flanges at their terminal ends, and which halves cooperate to define an essentially circular opening. The inner surfaces of adjacent flanges abut along their inboard portions and then generally diverge. Aligned holes of elongated configuration are provided in the flanges to permit securing of the halves together in assembled relation with bolt and nut combinations or the like. The point where the inner surfaces of adjacent flanges commence to diverge is inboard of the inner edges of the bolt head and nut; and, as a result, the halves may be swung to a substantially open position after removal of one of the bolts only and without any loosening of the other bolt.

Abstract: A side-outlet pipe coupling having a split housing surrounding split-ring gasket means is provided. Lugs formed at the free ends of the gasket means position said gasket means within the coupling housing such that abutting free ends of the gasket means are off-set from the plane of splitting of the housing.

Abstract: A self-compensation gasket for grooved end pipe couplings for use in sealing the joint between the pipe ends. An "immediate" seal at the pipe end gap serves as a barrier to possible entry of solids into the internal working section of the gasket. Compression pads on the outside diameter of the gasket concentrate the loading of the gasket in a localized manner such that a high compression loading may be insured.