Abstract: This disclosure relates to an expansion joint to connect two or more concentric bodies that are heated/cooled to different temperatures for the passage of liquid or gases. When the connecting portion is at an angle not in plane with the concentric bodies, the design allows for the gravity drainage of fluids and slurries from one connecting body to another without pooling or damming.

Abstract: A sealing grommet is for use in coupling in sealed relation a drain pipe depending from a roof and a co-operating leader pipe. The bottom end of the drain pipe is inserted into the top end of the co-operating leader pipe. The outside diameter of the drain pipe is smaller than the inside diameter of the co-operating leader pipe by an unspecified distance. The sealing grommet comprises an annular base portion having top, bottom, radially inner side and radially outer side surfaces. An annular interior wall portion extends upwardly from the base portion to terminate at a top edge, and is defined by opposed inner and outer wall surfaces. The interior wall portion has an overall inside diameter defined by the inner wall surface. A substantially resilient annular exterior wall portion extends upwardly and outwardly from the base portion in spaced apart relation to the annular interior wall portion, to terminate at a top edge, and is defined by opposed inner and outer wall surfaces.

Abstract: A resilient gasket is disclosed for providing a seal between corrugated pipes having a plurality of concentric ribs on their outer surfaces, such as drain and sewer pipes to be buried in soil. The gasket comprises a base which is received around a first pipe over top of a rib adjacent an end of the first pipe, with an inner surface adapted to mate with a radially outer surface of the rib, and with legs adapted to extend along forward and rearwardly-sloped faces of the rib. The outer surface of the base is provided with sealing elements to engage the inner surface of the bell adjacent the end of a second pipe. The gasket also has a flap extending outwardly and forwardly from the forwardly extending leg. The flap and the forward leg form a V-shaped member. The flap engages the inner surface of the bell when the first pipe is inserted into the second pipe, and the gasket is rotated rearwardly relative to the rib.

Abstract: An expansion coupling, for connecting a first conduit to a second conduit, has a housing that is open at opposite ends thereof. The conduits and at least one end of the housing have sealing means that comprise an interior sealing ring and an exterior sealing ring that has a larger external and internal diameter than the interior sealing ring. The interior sealing ring has a radially inwardly directed sealing surface and the exterior sealing ring has a radially outwardly directed sealing surface. The sealing rings have sealing side surfaces for sealing against adjacent sealing rings and the sealing rings are radially displaceable with respect to each other to accommodate for any misalignments of connected conduits.

Abstract: Cast iron pipe and other elongated hollow articles are lined with a cementitious mortar for certain applications, such as the transmission of potable water or sewage. To improve the resistance to attack from acids and to provide a crack and holiday free cement lining, a calcium alumina cement is used to line the article. A plasticizer such as fireclay is added to the calcium alumina cement prior to its application. The cement lined article is then coated with an asphaltic based coating and then cured in a high humidity environment.

Abstract: A fluid conduit system, including silencer systems, including intake and exhaust systems for engines, blowers, compressors, pumps, and the like, includes first (16), second (22), and third (28) pipes, and first (34, 36) and second (38, 40) flex joints each flexibly and sealingly interconnecting respective outlets and inlets of respective pipes. The flex joints include double O-ring sealing gaskets provided by first and second annular meshes (46, 48) received in respective annular grooves (50, 52) separated by a land (54), and a cloth (56) wrapped around the annular meshes and having a central web portion (58) spanning the land.

Abstract: An air conduit system (10) has a male air tube (22), a plurality of annular gaskets (26, 28, 30) around the male air tube (22), and a female air tube (24) receiving the male air tube (22) and engaging the gaskets (26, 28, 30) in sealing relation. The interface of the tubes is adjustable along three degrees of freedom, including a degree of freedom differentially compressing and expanding different of the gaskets such that one of the gaskets compresses while another expands.

Abstract: There is disclosed herein a tubular coupling comprising a first tube, a cage disposed on an end portion of the first tube, a bead for retaining the cage on the end portion of the first tube and a second tube telescopically engageable with the first tube. The coupling further include a spring disposed around the cage for preventing telescopic disengagement of the second tube from the first tube as well as a plurality of o-rings disposed on the end of the first tube. One of the o-rings is disposed at the pivot point of the coupling, the pivot point being defined as the midpoint of the distance between a first contact point and a second contact point between the first tube and the second tube when the tubes are engaged.

Abstract: A coupler for use with helical double-wall corrugated pipe is disclosed having a spigot portion and a bell portion. The spigot portion has at least one corrugation formed therein, a spigot portion first edge and a spigot portion second edge, and is adapted to screw onto the end of a first pipe having a first pipe corrugated outer wall and a first pipe inner wall. The spigot portion second edge is adapted to be secured to the first pipe outer wall, and the spigot portion first edge is adapted to be secured to the first pipe inner wall. The bell portion has at least one corrugation formed therein, a bell portion first edge, and a bell portion second edge, and is adapted to screw onto the end of a second pipe having a second pipe corrugated outer wall and a second pipe inner wall. The bell portion second edge is adapted to be secured to the second pipe outer wall, and the bell portion first edge is adapted to be secured to the second pipe inner wall.

Abstract: A connector assembly is provided for connecting two pipes of dissimilar material. In particular, an assembly is provided for connecting a first end portion of a first pipe to a second end portion of a second pipe formed as a bell housing having a larger inside diameter than an outside diameter of the first end portion and which second end portion overlaps the first end portion. The connector assembly includes a mandrill for attachment to the first end portion, which is formed as a flange extending radially from an outside circumference of the first end portion to face at least a portion of an end face of the bell housing, and an axial tubular extension extending from the flange so as to, upon assembly, reach a point approximately equal to an axial end point of the first pipe, and reside within the second end portion creating an annular space therebetween.

Abstract: A sealing gasket and oval concrete pipe combination and method of producing the concrete pipe joint to improve the seal of the concrete pipe joint cooperatively formed between adjacent oval concrete pipes wherein the sealing gasket comprises a retainer element disposed to engage one of the adjacent oval concrete pipes to maintain the position of the sealing gasket relative to the adjacent oval concrete pipes during assembly of adjacent oval concrete pipes, a base member to aid in the alignment of adjacent oval concrete pipes during assembly and cushion adjacent portions of adjacent oval concrete pipes and a sealing element to seal the joint between adjacent oval concrete pipes and wherein each oval concrete pipe comprises a male and female joint member formed on opposite ends thereof to operatively engage the corresponding joint member formed on the next adjacent oval concrete pipe to form the joint therebetween, the male and female joint members including corresponding shaped portions to facilitate alignment

Abstract: A device for sealing a space between an annular wall defining an opening and a pipe end portion introduced into the opening consists of a sleeve (2) having at one end thereof a flange (4) for restricting the introduction of the sleeve into the opening and having at its other end a flange (6) for restricting the introduction of the pipe end portion into the sleeve.

Abstract: A separation preventive pipe joint is provided, in which a locking ring is held by an elastic ring with its axis centered in a locking ring receiving groove. An outer peripheral projection is formed on an end portion of the spigot, the outer peripheral projection being engageable with the locking ring from a location deeper than the locking ring. An inner peripheral projection is formed in an inner peripheral portion of the socket which is located deeper than the locking ring receiving groove for backing up the locking ring. A first inner peripheral surface having a larger diameter than the inner peripheral projection is formed in an inner peripheral portion of the socket which is located deeper than the inner peripheral projection. A second inner peripheral surface is formed between the first inner peripheral surface and the inner peripheral projection, the second inner peripheral surface being larger than the inner peripheral projection and smaller than the first inner peripheral surface in diameter.

Abstract: A seal between two interlocking concrete components in which the seal (3) is bonded into the cone sleeve together with a body (12) of light material, said body providing a yielding region at the base of the sleeve near the sleeve surface.

Abstract: A sealing device on a pipe includes an elastic sealing ring of generally U-shaped cross-section, which is clamped on the pipe by a clamping strap. The U-flanges of the sealing ring are so loaded by the pressure exerted by the clamping strap on the U-web of the sealing ring as to occupy a substantially radial position.

Abstract: A sealing device for a sealing space defined by sealing surfaces of two elements (2, 6), preferably pipes or well rings consisting of concrete, comprises a sealing element (28). The sealing element is adapted to seal a section of the sealing space extending transversely of the jointing direction of the two elements and has prior to the jointing of the elements a substantially C-shaped cross section.

Abstract: A restraining element for preventing separation of telescoped pipes comprising a compressible body of elastomeric material, the compressible body having metal segments spaced equidistantly around an exposed face of the body, each of the metal segments having a first exposed face with a row of teeth, at least four teeth of the row of teeth lying in an arc, and at least some of the metal segments having a single tooth extending radially outwardly beyond the face of the metal segment opposite the first exposed face.

Abstract: An expansion joint includes first and second conduits connected by an expansion joint element. The second conduit has a liner portion which protrudes into the first conduit, so that the expansion joint element, first conduit, second conduit and liner portion together define an expansion joint cavity. A cartridge is located within the expansion joint cavity and is affixed to an end portion of the first conduit. The cartridge has a groove which faces the liner portion and houses a ring which slides within the groove while maintaining sliding contact with the liner portion of the second conduit. The outer diameter of the groove is preferably larger than an outer diameter of the ring to allow lateral movement of the first and second conduits relative to one another. Either the expansion joint cavity or the cartridge groove may be provided with a purge fluid inlet to prevent the intrusion of the service fluid and its associated contaminants into the expansion joint cavity.

Abstract: A locking structure of a connector with a waterproof packing to prevent incomplete locking of the connector. The locking structure comprises: a waterproof packing attached to the first connector half; two rows of sealing lips with a first sealing lip and a second sealing lip integrally formed with the waterproof packing, the first sealing lip being taller than the second sealing lip, wherein the second connector half is inserted into the waterproof packing, and slidably contacts the first sealing lip in the first stage and then slidably contacts the second sealing lip to lock the waterproof connector.

Abstract: A motion transmitting remote control cable assembly (10) includes a flexible remote control core element (12) and a conduit (14) which slideably supports the core element. The conduit (14) has a jacket (16) defining an outer surface and an inner bore. A liner (18) lines the inner bore and includes a protruding end protruding from an end of the jacket. The conduit (14) also includes a plurality of lay wires (20) having ends protruding from an end of the jacket (16) together with the liner (18). The ends of the lay wires (20) are formed to have an arch-shaped protrusion (22,26) which protrudes radially from the end of the liner (18). Such a protrusion (22,26) forms a mechanical lock between the conduit (14) and an end fitting (24) which is molded over the end of the conduit, preventing axial movement between the end fitting and the conduit.

Abstract: A flexible joint for the connecting and sealing of tubular sections that includes a flexible pad having inner and outer surfaces. A contoured portion extends around the inner surface of the pad. The flexible joint further includes a first tubular section having a raised portion. The raised portion engages the contoured portion on the inner surface of the pad. A second tubular section includes a housing. The housing has exterior and interior surfaces. The interior surface of the housing engages the outer surface of the pad for retaining the pad in a sealing relationship with the first tubular section.

Abstract: A pipe coupling, comprising a sleeve having at least one end adapted for the insertion of a pipe and being provided with a substantially conically shaped supporting surface for a sealing ring. A compression ring is provided by which the sealing ring may be compressed around the pipe. The sealing ring is composed of a circumferentially compressible, but in cross section rather undeformable annular core, which is more particularly bent of a helical body having substantially circular windings, and a sheath of elastomeric material which forms the actual seal. The sheath completely encloses the annular core both cross sectionally and circumferentially. The supporting surface has a progressively decreasing diameter in the pressing direction.

Abstract: A restraining element for preventing separation of telescoped pipes comprising a compressible body of elastomeric material, the compressible body having metal segments spaced equidistantly around an exposed face of the body, each of the metal segments having a first exposed face with a row of teeth extending radially inwardly and a single acutely pointed tooth extending radially outwardly beyond the face of metal segment opposite said first exposed face.

Abstract: Composite gasket for locked assembly between a first pipe T1 with a socket 15 and a second pipe T2 with a spigot 20.The gasket G comprises locking inserts 7 with a nose 11 for catching on the spigot 20. The inserts 7 are capable of an angular movement varying their inclination relative to the axis X--X of the gasket G.The invention is used for the locking of pipes having wide diametral production tolerances.

Abstract: A seal ring socket is disclosed having a ball ring at an insert end which rolls up on a socket neck portion when an insertion pipe is pushed into the ring socket. The rolling of the ball ring expands its volume to insure a water-tight seal against the insertion pipe. Grooves formed in a socket neck portion cause unbalanced stressing of the interior and exterior surfaces of the ring socket thereby assisting in the rolling of the ball ring.

Abstract: A pipe joint and a locking member for use with the pipe joint are provided for a bell and spigot type joint, the locking member being a separate element disposed axially outwardly of a fluid seal gasket within the bell end of a first of the pipe elements, the locking member being made up of an elastomeric backing member and at least one locking segment, the elastomeric backing member being adapted to seat in a first annular recess in the bell end, and against a radially inwardly protruding shoulder, this seating position urging the outer surface of the locking segment into contact with the wall of the first annular recess, to effect a constant, positive wedging action against a spigot end of a second pipe element inserted into the bell end of the first pipe element.

Abstract: Disclosed is a joint system for connecting a smooth walled end portion of a pipe to fittings or other pipe. The smooth walled end portion of the pipe has a gasket attached thereto which covers a portion of the end of the pipe and a portion of the outer surface of the pipe adjacent to the end. The fitting or other pipe has a bell end attached thereto with the inner surface of the bell provided with cylindrical surfaces of different diameters separated by a surface perpendicular thereto. When the joint is assembled, the gasket engages a cylindrical surface and the perpendicular surface.

Abstract: A hose (1) and hollow member (2) arrangement in which the hose is fittable at its end over the hollow member. The hose (1) has an inner wall and an annular recess (3) in this wall for receiving an annular projection (10) of the hollow member, and beyond this recess (3) in the direction away from the end of the hose a lip seal (4) extending circumferentially all around the inner wall of the hose. The lip seal (4) extends away from the inner wall obliquely in the direction away from the end of the hose (1) and is disposed for engaging the end face of the hollow member (2) with a gap (9) left between opposing faces of the inner wall of the hose (1) and the lip seal (4). When assembled, a fastener (12) secured around the end portion of the hose (1) holds the hose fast against the hollow member (2).

Abstract: An exhaust gas recirculation supply tube for an automotive engine includes an inlet tube with a first end adapted for connection with a source of exhaust gas from an engine and a second end having one portion of a telescoping joint, and an outlet tube with a first end adapted for connection with an exhaust gas recirculation control and a second end having a telescoping joint portion slidingly engaged with the telescoping joint portion of the inlet tube. A gas sealing member extends about the telescoping joint portions of the inlet and outlet tubes.

Abstract: A pipe joint consists of a sleeve (2) surrounding a socket chamber (3) for receiving a spigot (5). A gland (9) extends into the socket chamber (3) against a heel portion (12) of a sealing ring (7). Axial movement of the gland (9) forces the sealing ring (7) and causes a leading nose portion (14) of the sealing ring (7) to be deflected radially inwardly by the internal profile of the sleeve (2) against the external surface of the spigot or pipe end (5), thereby forming a seal. The heel portion (12) of the seal ring (7) maintains substantially the same radial position in the socket (3).

Abstract: An air flow conduit system is presented for air flow communicatoin between an air filter mechanism and an engine intake manifold. The conduit system comprises substantially rigid straight conduit members joined in fluid communication by connector systems having elbow-shaped conduit members. A narrow end of a conduit member is received within a broad end of a next adjacent conduit member. Sealing engagement occurs by means of an elastomeric seal member having ribs thereon positioned radially between the inner and outer conduits. A preferred rib arrangement is provided, to insure a flexible, multipoint, seal system.

Abstract: An air flow conduit system is presented for air flow communication between an air filter mechanism and an engine intake manifold. The conduit system comprises substantially rigid straight conduit members joined in fluid communication by connector systems having elbow-shaped conduit members. A narrow end of a conduit member is received within a broad end of a next adjacent conduit member. Sealing engagement occurs via an elastomeric seal member having ribs thereon positioned radially between the inner and outer conduits. A preferred rib arrangement is provided, to insure a flexible, multi-point, seal system.

Abstract: A pipe bell or fitting socket is disclosed which includes an enlarged socket defining an interior, gasket receiving pocket. The enlarged socket terminates endwardly in a front socket terminus and interiorly in an interior terminus. An integral, outwardly extending, reinforcing ring projects radially outwardly from the outer periphery of the socket and provides increased body for socket strengthening purposes. The reinforcing ring may be medially positioned on the socket, may be endwardly positioned on the socket or may be otherwise positioned as best suited for the purposes of use. The reinforcing ring may be of any desired cross-sectional configuration, for example, square, triangular, rectangular or other cross-section.

Abstract: A gasket formed of an extruded elastomeric material which is joined at its ends to form a closed loop. The gasket has a cross-section defined by a T-shaped anchoring flange integrally joined to a substantially pear-shaped portion which tapers in the radially inward direction. An integral flange extends diagonally away from the radial direction and serves to significantly enhance the water-tight seal provided by the resilient gasket, as well as significantly increasing the range of pipe diameters capable of being accommodated by the gasket. Disc-shaped or cylindrical-shaped inserts insertable into cavities at angular intervals about the wall of the opening engage the gasket to center the pipe and to aid in reducing shearing forces.

Abstract: A flexible coupling for transferring a fluid between two fluid conduits and for providing an effective fluid seal is disclosed. The device includes a body portion containing a hollow interior open on opposite ends thereof and having a raised cylindrically shaped end collar formed around at least one of the open ends. The end collar defines an outwardly opening, endlessly extending groove in which a seal ring assembly is removably disposed and which projects out of the groove to provide an effective fluid seal against a cylindrically shaped bearing surface of a hollow conduit collar, the latter being attachable to one of the fluid conduits. A pair of stop members disposed in the conduit collar confines the end collar for both rotatable and translatable sliding movement therebetween. The body portion is also angularly adjustable relative to a centerline of the hollow interior of the conduit collar. Various removable seal ring and biasing spring configurations for use in the end collars are also disclosed.

Abstract: A coupling for joining first and second channels in fluid communication includes a tubular housing having a first section including a wear surface, and a second section for being removably joined in fluid communication with the second channel. A first fitting includes a flange for being joined in fluid communication with the first channel, and an integral piston including a piston ring disposed in contact with the wear surface for forming a seal therewith. Differential movement between the housing and the piston is accommodated while maintaining a seal with the piston ring.

Abstract: A pipe joint sealer for providing a watertight joint in metal pipe, cast concrete pipe, plastic pipe and the like is disclosed. The pipe joint sealer prevents fine dirt and sand from entering the pipe through the joint. The pipe joint sealer is comprised of an absorbent material such as low density, open cell, resilient foam which is saturated with a quantity of water reactive urethane prepolymer. The urethane prepolymer saturated foam is sandwiched between two layers of a geotextile fabric such as polypropylene which permit moisture to come into contact with the urethane prepolymer saturated foam. Moisture causes the urethane prepolymer saturated foam to expand and thereby form a dynamic watertight seal. Drying of the urethane prepolymer saturated foam causes it to shrink back toward its original volume. Thereafter, the pipe joint sealer of the present invention forms a new watertight seal each time it is wetted.

Abstract: A sealing ring for sealing in a pipe joint an annular space between a socket end and a spigot end introduced therein comprises an annular sealing portion (8) consisting of elastically yielding sealing material and a substantially annular reinforcing portion (10) consisting of a material which is rigid in relation to the elastically yieldable material, the sealing portion (8) and the reinforcing portion (10) being fixedly connected with each other at the connection surface (18). The outer surface (40) of the sealing ring has a surface portion which is of a shape corresponding to the shape of the connection portion as parallelly displaced in the axial direction of the ring. The invention also relates to a mould for manufacturing such a sealing ring by means of injection moulding.

Abstract: A sleeve adapter (S) for locating a throughpipe (24) in a structural member (18). The sleeve adapter (S) comprises an annular apertured hub (2) having a central axis .alpha., a first annular surface (4) adjacent a first face of the hub (2) sloping inwardly toward the axis, a second annular surface (8) adjacent a second face of the hub (2), and a third annular surface (12) intermediate the first (4) and second (8) surfaces of a smaller diameter than the second annular surface (8). The adapter (S) also comprises a mechanical joint gasket (6) engaging the first annular surface (4) which locates a throughpipe (24) concentric with the central axis, a push-on gasket (10) engaging the second annular surface (8) which locates a sleeve pipe (14) concentric with the central axis, and a pressure device for urging the mechanical joint gasket (6) against the first annular surface (4) and the throughpipe (24).

Abstract: An annular gasket 1 for sealing joints between male and female socket pipes has an anchoring structure 2 and a sealing body 3, the anchoring structure having an anchoring heel 5 provided with outer peripheral recesses 27.

Abstract: A sealing ring for sealing the space between two substantially coaxial sealing surfaces which are axially insertable one in the other to a jointed position, especially for sealing the annular space between socket and spigot end of a pipe joint, comprises a first sealing portion (2) and a second sealing portion (4). The sealing portions are adapted at the axial insertion movement substantially stationary to engage one surface each of said sealing surfaces and to slide against each other. The first and the second sealing portion are by means of a releasable and/or substantially expensible connector portion (6) connected with each other at least at the front side of the sealing ring in respect of the direction of insertion movement of the second sealing surface during the jointing of the sealing surfaces.

Abstract: A sealing ring for sealing a space between two concentric sealing surfaces engageable one inside the other comprising first and second sealing portions each having a sliding surface. The sealing portions engage each other at the sliding surfaces and upon insertion one of the sealing surfaces in the other sealing surface each and to side against each other along the sliding surfaces which are preferably provided with lubricant. In the sealing ring illustrated, one of the sealing portions has a substantially conical sliding surface and the other sealing portion is connected with the first sealing portion and from that point of connection extends along the conical sliding surface so that the second sealing portion covers substantially the whole conical sliding surface in the starting position for inserting one of the sealing surfaces into the other.

Abstract: An end portion of a pipe fitting or coupling member is provided. The member has a central longitudinal axis, a mouth at its very end, and an annular groove for receiving a gasket. The groove presents a first end wall spaced from and axially facing the mouth. The end wall has a radial inward end and a radial outward end. A radially inwardly facing axially extending bottom wall extends substantially parallel to the longitudinal axis towards the mouth and extends from the radial outward end of the first end wall. The bottom wall terminates at a second wall axially facing the mouth. The second wall extends radially outwardly from the bottom wall has a radial inward end and a radial outward end, the radial inward end of the second wall connected to the bottom wall.

Abstract: In the environment of telescoping pipes, a collapsible member is placed between a fixed weld and a locking segment so that when extraordinary forces are applied which tend to cause the pipes to be pulled apart, the crushing element absorbs the excessive forces and prevents its disengagement.

Abstract: An annular gasket of elastic resilient material for sealing the annular gap between a spigot end and a socket end of two pipes, said spigot end and socket having substantially coaxial sealing surfaces. The gasket comprises a main sealing body which, during the assembly of the pipes, non-slidingly engages a first pipe, and a thin-walled further body which defines a closed cavity containing a lubricant. During assembly of the elements, said further body is entrained by the second pipe and rolls between this pipe and the main sealing body. The inner surfaces of the hollow further body are pressed into contact with each other and slide relative to each other. The flattened further body increases the thickness of the gasket by twice the wall thickness of the further body.

Abstract: A coupling is made up of annular resilient packing members having on their peripheral surfaces, a sleeve having flanges secured to opposite ends of the sleeve, and annular projections formed on the inner surface of the sleeve. When the packing members are inserted between the sleeve and pipes to be connected together, the projections are received in the grooves. The opposing ends of the packing members are respectively provided with pairs of lips. Before insertion, each pair of lips are separated away by a distance between the sleeve and the pipe, so that when each packing member is inserted the distance between the lips is decreased so that lips firmly engage the sleeve and pipes thus forming a resilient seal. As a consequence the coupling is flexible and can move relative to the pipes.

Abstract: A mould and sealing ring constitutes a mould element in forming a socket end on a pipe consisting of thermoplastic material and seals the space in a pipe joint between the socket end and the spigot end of a pipe introduced into the socket end. The mould and sealing ring comprises an annular sealing portion consisting of elastically yieldable sealing material and a second substantially annular portion for reinforcing the mould and sealing ring consisting of a material which is rigid in relation to said elastically yieldable material and is connected with the elastically yieldable material at a connection surface.

Abstract: A structure for connecting ends of exhaust pipes is disclosed. The structure for connecting is constituted by an annular elastic sealing member with heat resistance which is interposed between two overlapping surfaces of two cylinders in a temporally compressed manner, outwardly-projecting annular projection means each of which is disposed on the surfaces of the cylinders at the portions which do not overlap each other, a first coil spring member which is disposed at an adjustable interval above the surface of the cylinder, and two ends of which are secured to the annular projection means, a second coil spring member two ends of which are secured to two final coils of the first coil spring respectively, and which is disposed over the outer portion of the first coil spring in such a manner that the coil wire of the second coil spring is alternately disposed between the coil wire of the first coil spring.

Abstract: To connect two pipes which may carry high-temperature potentially corrosive fluids, for example exhaust gases from an internal combustion engine, while permitting flexing of the pipes with respect to each other in torsion or twist, bending or lateral shift, while maintaining a sealed connection, a ring chamber is formed in the region of the pipe ends, by an overlapping pipe end portion of the like, an external sleeve, or overlapping flange construction, which retains therein a sealing and support pillow of ceramic or metal materials in form of fibers, filaments or the like, felted, matted, woven, knitted and compressed together; a metal sealing foil, for example of aluminum or specialty steel, crinkled or creased and preferably formed with expansion/contraction undulations, is located within the pillow.

Abstract: A metal conduit assembly for interconnecting the discharge duct of the pump and the inlet coolant duct or reactor core in a pool-type nuclear reactor. The conduit assembly comprises an upper section for connection to the discharge of a reactor pump, a lower section for connection with the coolant inlet duct with reactor core and a third intermediate tubular section for interconnecting the other two sections. Joint means are provided for interconnecting one end of the intermediate section with an adjoining end at the upper section and an opposite end of the intermediate section with an adjoining end of the lower section. The joint means comprises a male portion having a ridge provided with a circumferential groove for receiving a seal means and an associated female portion having an inside diameter greater than that of the ridge for receiving said male portion and a seal means.