Abstract: A through-flange for attaching a pipe to the curved sidewall of a vessel. A flange portion of the through-flange is contoured to match the curvature of the sidewall and thus can be glued directly to the sidewall. A retaining ring also being contoured to match the sidewall is inserted over a tubular portion of the through-flange.

Abstract: A branch connector in a fuel pressure accumulating container is joined with a through hole formed on a peripheral wall of the pressure accumulating container. The branch connector is inserted deeply into the through hole until the distal end of the branch connector is projected from the inner peripheral wall surface of the pressure accumulating container. Thus, the internal pressure fatigue strength is improved by lowering the maximum stress value generated at the internal peripheral edge at the lower end of the branch connector.

Abstract: Apparatus and methods include an adaptor to establish a flow path through the side of a first piece of tubing (rather than the end of the tubing) into a second piece of tubing or other device. The adaptor includes a threaded head slightly larger than the hole in the side of the tubing into which it is to be inserted, and gripping portions to assist in forcing the threaded head through the opening. After the head has been inserted, a sealing element is tightened to prevent leakage. To join lay-flat tubing to drip tubing, the other end of the adaptor includes an annular barbed end; a sleeve member around the barbed end; and cooperating structures acting between the barbed end and the sleeve to move those relative to each other. Barb structures on the sleeve member cooperate with the barbed end to sealingly engage the drip-tubing end.

Abstract: The invention relates to a common rail for a common rail fuel injection system of an internal combustion engine, having a base body whose interior communicates with a plurality of connection openings. To increase the high-pressure strength, one elongated connection stub extends through each associated connection opening into the interior of the base body.

Abstract: A pipe seal is disclosed which comprises a main body portion (1) adapted to be fixed to the wall (12) of a chamber, tank, or the like, a face plate (6) adapted to be secured to the body portion to surround, in use, a pipe (14) to be sealed, the body and face plate between them housing a deformable member (9) in contact with a seal (8), such that, on forcing the face plate toward the body portion, the deformable member, in use, deforms and presses the seal into sealing contact with the pipe. The design of this pipe seal allows the pipe to enter the chamber wall at an angle of, for example, up to 12 degrees from a right angle. Hence the end of a pipe could generate a cone of movement with an included angle of 24 degrees. The seal therefore permits considerable positional movement of the pipe to allow connection of the pipe to its termination point within the chamber.

Abstract: A connection and a method of providing a connection includes a fluid tight communication between a valve and a tube. The valve includes a first surface, a second surface, a cavity, and an aperture extending through the valve between the first and second surfaces. The tube includes a first portion, a second portion and a third portion between the first and second portions. The first portion penetrates the first surface and extends through the aperture into the cavity. The third portion is deformed so as to engage the second surface.

Abstract: A fuel supply apparatus includes an inlet box, and a filler neck. The inlet box is dented in a vehicle panel, and has a bottom wall, a neck-penetrating opening pierced through the bottom wall, a box-side axial engagement portion and a box-side radial engagement portion. The filler neck is disposed to penetrate through the neck-penetrating opening into the inlet box, and has an outer peripheral surface provided with a flange. The flange has a flange-side axial engagement portion engaging with the box-side axial engagement portion to regulate axial movements of the filler neck, and a flange-side radial engagement portion engaging with the box-side radial engagement portion to regulate radial movements of the filler neck. The fuel supply apparatus can be assembled with ease, and can be manufactured at reduced cost.

Abstract: An inlet/outlet, rotomolded, flexible containment fitting for polyolefin double wall vessels attachable externally to a vessel's outer, sidewall. The molded flexible containment fitting having a corrugated wall portion and circular flanges at each end, one of which is attached to the outside of the containment vessel with the opposite flange having a pipe member extending internally through the fitting a pipe flange attached externally to the inner vessel wall thereby providing compensation for deflection, alignment, expansion and contraction of the inner vessel relative to the external containment vessel while still maintaining a secure fluid conduit through both the inner and outer vessel walls.

Abstract: The present invention relates to an ventilation duct construction and a method which increases the fire-retardant capability of a ventilation duct. According to the invention, an improved fire-retardant capability of a ventilation duct or sound absorber is obtained by providing the ventilation duct with a shielding sheet at a distance from the same so that an air gap is formed therebetween. The time during which the outside temperature of the construction can be kept down is prolonged, while the construction remains compact.

Abstract: A protective sleeve in the form of a pressure relieving arch having a pair of split pipe sleeves for surrounding an uncut pipe or an uncut piping system preventing breakage by relieving structural strain from loads of a wall, footing or foundation around the pipe or piping system being protected. The pressure relieving arch includes a first protective pipe sleeve in the shape of a hollow semi-circle having a first pair of mating edges; and a second protective pipe sleeve in the shape of a hollow semi-circle having a second pair of mating edges. The first pair of mating edges of the first protective pipe sleeve for mating and connecting with the second pair of mating edges of the second protective pipe sleeve for forming a hollow and cylindrically-shaped pressure relieving arch.

Abstract: In a siphon tube (1) of a reservoir, even when a front end of tube (1) is in the vicinity of the bottom of the reservoir, there is no fear that slurries are sucked by tube (1) which: reaches the bottom of the reservoir to draw a liquid contained therein out of the reservoir is characterized by a liquid-inlet opening (3) directed normal to a longitudinal axis of tube (1) Tube (1) has its front end formed into: an inverted T-shape provided with opposite end openings in a laterally extending portion thereof, each of which openings forms the liquid-inlet opening (3); or, an L-shaped curved form a front end of which forms an opening directed normal to the longitudinal axis of tube (1); or, is closed with a cap so that an opening is disposed adjacent to an upper surface of the cap to serve as the liquid-inlet opening.

Abstract: A leak-proof assembly for mounting an air horn on a truck cab roof. The mounting includes a threaded portion extending through the roof, a flange extending circumferentially around the fitting, and a horn stud portion. Concentric seals, adjacent the threaded portion provide a redundant water-tight compression seal against the roof. A nut is mounted on the threaded portion and also includes an o-ring. Upon tightening, the two concentric seals provide leak proof seals around the hole defined by the body panel. The mounting defines an internal air passage so that the horn can be operated by a source of compressed air attached to the threaded portion from the vehicle interior.

Abstract: A watertight, through wall connector has a tubular body, an O-ring and a holder. A neck is formed on one end of the body has to be bent to hold the holder. With such a connector, the neck is not easily cracked during the pressing process, and the deformation of the body will not occur. This can provide a watertight seal. In addition, the O-ring can fully expand by means of being squeezed between the inside wall of the reservoir and the holder. This can provide a watertight seal due to the full expansion of the O-ring.

Abstract: A sealed coupling system for flexible hose, such as corrugated hose, includes a termination fitting that mounts the sealed system to a static structure, such as a wall or the like. The system uses threaded connections to fix the hose to the fitting and to the structure and thus does not require welding, brazing or the like and has the main components thereof located on one side of the structure.

Abstract: This apparatus and method simplifies the installation of a dryer unit to the vent ducting, and facilitates the installation and disconnection of the dryer by couplings that are self connecting and are removably and releasably attachable to one other. This invention allows the connection of a dryer exhaust pipe to vent ducting such that a unit may be positioned in close proximity to a wall whereby the exhaust of the unit may flow from the exhaust pipe, across the apparatus, to the venting system. The apparatus of this invention can also be used with additional tubing or couplings, if necessary.

Abstract: An cylindrical convex portion of which opposite ends are open is integrally formed onto a fuel tank made of RDPE therewith so as to inwardly extend in the fuel tank, to provide an opening thereon. A press-fit portion of a filler hose connecting pipe made of PA as a tubular member is press-fitted in the cylindrical convex portion to connecting the tubular member to the fuel tank. At least one annular projection is provided on the outer peripheral surface of the press-fit portion of the tubular member so as to bite in the inner peripheral surface of the cylindrical connvex portion. A face of the annular projection in direction axially of one end of tubular member is formed so as to extend outwardly and inclinedly with respect to the axial direction of the tubular member form one end toward the other end thereof.

Abstract: A device for tightening a spout, attached to a previously installed angled pipe having an outside radius of curvature, in a position relative to a stop member having an opening through which at least a length of the pipe extends, comprising, at least one sleeve, comprises: at least a first leg and a second leg which meet at a juncture which defines an angle substantially corresponding to the angled pipe, wherein the first and second legs have a combined total length, wherein the first leg has a leg length and is substantially rigid along at least a portion of the leg length, has an inside radius of curvature that is approximately equal to or greater than the radius of curvature of the angled pipe, and wherein the sleeve has a slit, along the entire total length of the first and second legs, to allow the sleeve to be pressed onto and at least partially about the angled pipe; and a method for using the same.

Abstract: A protective sleeve in the form of a pressure relieving arch having a pair of split pipe sleeves for surrounding an uncut pipe or an uncut piping system preventing breakage by relieving structural strain from loads of a wall, footing or foundation around the pipe or piping system being protected. The pressure relieving arch includes a first protective pipe sleeve in the shape of a hollow semi-circle having a first pair of mating edges; and a second protective pipe sleeve in the shape of a hollow semi-circle having a second pair of mating edges. The first pair of mating edges of the first protective pipe sleeve for mating and connecting with the second pair of mating edges of the second protective pipe sleeve for forming a hollow and cylindrically-shaped pressure relieving arch.

Abstract: The fastening device is intended for two hydraulically communicating fitting parts (1, 33). In order to fasten a lateral fitting part (33) on the end face to an outer wall (8) of a wide fitting part (1) at a predetermined angle, the fastening device comprises a fastening part (11) and a threaded tube (28) capable of being screwed into the latter. The shape of a zone (16) of one end of the fastening part (11) is matched to the outer wall (8) of the fitting part (1) according to this predetermined angle. The fastening part (1 1) has means (15) in order to be mounted on an orifice (9) of the wide fitting part (1). The threaded tube (28) is provided with an outer fastening means (32) which co-operates with an inner fastening means (35) of the lateral fitting part (33).

Abstract: The invention relates to a quick cone (1) for pipe assemblies for conducting fiber suspensions wherein the quick cone provides a transition from a pipe (8) with a greater diameter to a pipe (9) with a smaller diameter as seen in the flow direction of the fiber suspension. The invention is characterized therein that the quick cone (1) has a pipe (2) wherein the pipe (2) has a major portion of its axial extension concentrically enclosed by a jacket (3) that includes a conical jacket portion (4) that is shaped as a cut cone and a cylindrical connection segment (5) where a thicker end of the conical jacket portion (4) is in engagement with the cylindrical connection segment (5) that has substantially the same diameter as the larger diameter pipe (8) and the pipe (2) has substantially the same diameter as the smaller diameter pipe (9) and wherein the more pointed end of the jacket portion (4) is tightly attached to the pipe (2).

Abstract: This invention is a method and device for protecting steel gas lines and the like from environments which it may have to pass through, such as masonry and brick walls where the corrosive effects of chemicals in the cement could be disastrous. The device is composed of a an adjustable length of threaded PVC piping, a vinyl compression ring and a plastic sealing nut on each end for securing the vinyl compression ring and PVC piping around the steel piping.

Abstract: A pass-through dual containment fitting that protectively seals a portion of pass-through tubing has a fitting body that incorporates a first end, a second end and a collar, each having a longitudinal bore for receiving the pass-through tubing. The second end having an extending nose portion. A radially compressive sealing device is engagable with the first end of the fitting body. When the radially compressive sealing device is fully engaged with the first end a fluid-tight seal is formed between the device and the fitting body. A dual containment sealing device incorporates containment tubing having a flared end and a flared end fitting. The extending nose portion of the fitting body is inserted into the flared end. The flared end fitting engages the second end of the fitting body to compress the flared end to the extending nose portion to form a fluid-tight seal between the dual containment sealing device and the fitting body.

Abstract: The installation of a fire retarding division-penetrating member is enhanced and the member fits the outer circumference of inconstant penetrating material to prevent the filler from dropping. The heat expansion fire resistant material may be securely provided. A tongue piece (17) of fire resistant material (16) may fit to the surface and valley of pipe (25) and cable (26) only by fitting the saw teeth state heat expansion fire resistant material (16) with its upper face being covered with the sheet (19) inside the holding frame (11) of sleeve main bodies (10) and (10a) that are split into two pieces and by dropping these sleeve main bodies (10) and (10a) into the floor through-hole (24) from above. In this way, the filler like mortar (28) and so forth can be immediately filled from the upper floor with no need for repairing the heat expansion fire resistant material (16).

Abstract: A flexible entry boot assembly provides a fluid-tight fitting between a wall of a fluid containment region and a conduit passing through the wall. The flexible entry boot assembly comprises a seal member disposed within the containment region. A securing plate, disposed within the containment region, is releasably mounted to the seal member. A hollow support sleeve, integral with the seal member, extends axially into the containment region. The support sleeve has an outer surface and an inner, conduit receiving surface, and further has a degree of flexibility sufficient to allow for the insertion of the conduit at angles equal to or other than an angle normal to the fluid containment wall while maintaining a fluid-tight environment. The flexible boot assembly further comprises a mechanism for releasably attaching the hollow support sleeve to the conduit. A flexible, corrosion resistant sealing ring member is disposed outside the containment region.

Abstract: An exhaust gas cooling system for a vehicle includes a cooling fin system retrofit and a side exhaust pipe retrofit having an exhaust gas exit pipe having a first portion having a plurality of mixing portions which are either bends or internal mixing fins configured to mix vehicle exhaust gas, but not to restrict exhaust gas flow, a second portion fastened to the first portion and a chrome coated third portion fastened to the second portion and extending along the side of the vehicle. The cooling fin system retrofit includes an adjustable clamp and one or more cooling fins, each cooling fin having a base having a pair of upstanding arms, with one arm of the pair having a lip for engaging an arm of another cooling fin. An exhaust gas cooling system kit, a side exhaust pipe retrofit kit, a cooling fin kit are included.

Abstract: A tube connection apparatus for use with larger diameter flexible tubing particularly for hazardous material removal comprising an outer tapered sleeve and an inner tapered sleeve that is sized to snugly fit within the outer tapered sleeve and to engage the flexible tubing therebetween. A retainer ring is provided to secure a second flexible tube to the outer tapered sleeve and a transportable wall section which holds the sleeves may be positioned in a passageway of a building and tubing from spaces on either side of the passageway be connected.

Abstract: A shield positioned on the exterior of a sump to provide an access space for displacement of a portion of an entry fitting into the access space. The shield can allow for the removal of the entry fitting or an entry fitting seal without having to first remove backfill from the exterior of the sump.

Abstract: Quick connect couplings for connecting a small internal diameter brake hose to a formed metal tube in a brake system includes a connector body having a crimp collar at one end and a stepped bore with an entry opening at the other end. The stepped bore includes a first step which is abutted axially by a seal. In accordance with a preferred embodiment, a retaining element axially engages an inwardly extending radial surface in the bore and an annular groove in the tube. In accordance with the preferred embodiment, the retaining ring is integral with the tube and the seal is accomplished by a three lobed seal which is held in abutment with the first step by a Teflon.RTM. spacer, the Teflon.RTM. spacer being engaged by a bead on the formed metal tube.

Abstract: An interlocking intumescent collar is disclosed. The collar may be fitted around a pipe at the point where the pipe penetrates a wall or floor. The collar comprises a strip of intumescent material disposed on a collar body. Anchor tabs extend outward from the collar body and are adapted to be fastened to the wall or floor. The collar includes an interlock integral with the anchor tabs. The interlock holds the tabs in overlapping relationship when the collar is placed around a pipe. The interlock integral with the anchor tabs decreases manufacturing costs and facilitates the field installation of the collar.

Abstract: A flexible penetration fitting is provided for sealing the hole through which a pipeline penetrates a wall of an underground containment box. The penetration fitting includes a flexible boot with a sealing flange for providing a first seal against the inside wall of the box. The sealing flange is held against the wall by a backing ring placed against the outside wall of the box. The backing ring includes a plurality of studs extending through the wall and into the box. A compression ring with a plurality of holes is placed over the sealing flange with the studs of the backing ring extending though the holes. A plurality of nuts are threaded to the studs to hold the sealing flange firmly against the inside wall of the box. The flexible boot also includes a sleeve for providing a second seal against the outside surface of the pipeline. The sleeve is stepped with different sized openings so as to be able to receive different sizes of pipelines.

Abstract: A fire collar (10) is supported around a plastic material pipe (30) extending through a bore (32) in a wall (44). The fire collar (10) comprises a cylindrical metal collar (12) carrying a layer of intumescent material (36) on its inner circumferential surface. A sleeve (22) of fire resistant material is attached to the metal collar (10) and extends within the collar and around the pipe (30). In the event of a fire the pipe (30) melts. The intumescent material (36) is constrained to expand radially inwardly and as it does so it pushes the fabric sleeve (22) radially inwardly.

Abstract: A device is positioned for passing a lengthy object through an opening in a wall to which a flat plate made of a stable material is attached. The plate has a hole that corresponds to and is aligned with the opening. A one-piece rubber sleeve that surrounds the lengthy object is provided for its moisture-proof insertion, and has a lengthwise separation which can be closed. A circumferential groove is provided on the inside of the rubber sleeve and is designed to lay against the lengthy object; this groove contains a ring-shaped insert made of a flexible material. In addition, the rubber sleeve has an outwardly open circumferential recess at one outer axial end, to seal the edge that limits the hole in the plate.

Abstract: A steam outlet assembly comprises a metal tubular portion within which steam passes when the assembly is in use. A plastics steam nozzle extends through apertures in the tubular portion which are spaced apart circumferentially therearound. The plastics nozzle is provided with a transverse through-bore in the tubular portion interior opening out at a head end and/or a screw-threaded end of the nozzle, outside the tubular portion. The nozzle is provided with seals means around apertures on the outside of the tubular portion.

Abstract: A vibration isolating flange mount assembly for a pipe has a vibration abbing gasket and fastener recesses having a vibration dampening material disposed therein to provide a fluid seal between the pipe and a flooded structure and to isolate pipe vibrations.

Abstract: A flexible penetration fitting is provided for sealing the hole through which a pipeline penetrates a wall of an underground containment box. The penetration fitting includes a flexible boot with a sealing flange for providing a first seal against the inside wall of the box. The sealing flange is held against the wall by a backing ring placed against the outside wall of the box. The backing ring includes a plurality of studs extending through the wall and into the box. A compression ring with a plurality of holes is placed over the sealing flange with the studs of the backing ring extending though the holes. A plurality of nuts are threaded to the studs to hold the sealing flange firmly against the inside wall of the box. The flexible boot also includes a sleeve for providing a second seal against the outside surface of the pipeline. The sleeve is stepped with different sized openings so as to be able to receive different sizes of pipelines.

Abstract: The invention relates to a fastener device for fastening to a support plate, the device being constituted by a rider having a first fork whose two branches define an internal outline designed to co-operate with a polygonal element of a junction member to be held so as to prevent said junction member from rotating, and on the other side a second fork whose two branches can be placed astride an extension portion of the junction member, which branches are bent so as to bear both against the other face of the support plate and against a terminal shoulder of the extension portion so as to urge the junction member against the stop face of the plate, thereby holding said junction member against translation.

Abstract: An oil cooler (16) including an oil cooler housing (22) and a coolant hose connection (24) for transferring a coolant flow between a coolant hose (28) and the oil cooler housing (22), wherein the hose connection (24) changes the direction of the coolant flow through a predetermined angle after the coolant flow has entered the hose connection (24). The hose connection (24) includes a first opening (60) in the oil cooler housing (22) and a unitary piece of tubing (30) having first and second ends (32) and (34), a coolant opening (38) formed intermediate the ends (32) and (34) to transfer a coolant flow therethrough. The second end (34) is adapted for connection with the coolant hose (28) to transfer a coolant flow therewith. A flange (42) is formed around one of the coolant opening (38) and the first opening (60) and received in the other of the coolant opening (38) and the first opening (60).

Abstract: A wall penetrator sleeve system and method for using same provides an encasement for wires and cables passing through a wall or floor. The sleeve system is particularly useful in penetrating firewalls without violating the applicable fire codes. In one embodiment of the invention, the system includes an elongated conduit having a toothed end capable of penetrating the desired surface. The system also includes appropriate securing devices for tightly retaining the conduit in place. In another embodiment, the securing devices include at least one flat washer and a sliding washer lock on each side of the wall.

Abstract: A first pipe is press-fitted into a second pipe having an inner peripheral surface, circular in section, about an axis of the second pipe. The first pipe, having an outer peripheral surface provided with recesses each located between arcuate portions, and which recesses have the same radius about an axis of the first pipe and are located at a plurality of circumferentially spaced-apart points, The recesses are each located radially inwardly of a phantom circumferential extension of the arcuate portions to extend axially over a predetermined length of the first pipe.

Abstract: The present invention involves a flexible annular member passing through a wall opening. The flexible annular member is positioned about a conduit passing through the wall opening to enable the conduit to pass through the wall at an angle up to and even greater than 30.degree.. Another embodiment of the present invention comprises a flange type riser and base connection involving the location of the entire sealing assembly within a chamber base/riser section.

Abstract: A tube connection apparatus for use with larger diameter flexible tubing particularly for hazardous material removal comprising an outer tapered sleeve and an inner tapered sleeve that is sized to snugly fit within the outer tapered sleeve and to engage the flexible tubing therebetween. A retainer ring is provided to secure a second flexible tube to the outer tapered sleeve and a transportable wall section which holds the sleeves may be positioned in a passageway of a building and tubing from spaces on either side of the passageway be connected.

Abstract: A device for connecting a container wall with a pipe which extends through the container wall. The device comprises a muff which is provided on the outside of the pipe. One end section of the muff is connected with the pipe and the container wall is connected with the muff at a point located at a distance from this end section. The one end section of the muff comprises a ring flange which is arranged for a sealing and releasable connection with a ring flange of the pipe.

Abstract: A fireproof electrical wire housing (9) for routing electrical wires through a barrier wall, such as an aircraft bulkhead (21), without destroying the fireproof and hermetic functions of the bulkhead (21) is disclosed. The fireproof electrical wire housing (9) includes a sleeve (13) which surrounds a wire bundle (11) and a tubular housing (19). The tubular housing (19) includes a cover plate (17) that is mounted to the bulkhead(21). Thereafter, the sleeve (13) is inserted into the tubular housing (19). Holes (35) penetrating the wall of the sleeve (13) are used to inject a sealant into a cavity (39) in the sleeve (13) to prevent vapors and flames from passing through the fireproof electrical wire housing (9).

Abstract: A method and apparatus for separately supporting and sealing a heat pipe within a heat exchanger. For support, the heat pipe with fins thereon passes through a support grid which consists of a series of rings secured or interconnected together. The fins of the heat pipe rest upon these rings of the support grid thereby supporting this region of the heat pipe. To seal these heat pipes in order to prevent any gas escape from the heat exchanger, a tubesheet with openings therein is placed over the ends of the heat pipe. These openings are oversized thus a considerable gap exists between the tubesheet and the heat pipe. This gap is covered or sealed by use of a cover disk which tightly fits around the heat pipe and spans across this gap before it is removably secured to the tubesheet. By this fashion, once the cover disk is removed from the tubesheet, it is a relatively easy task to then remove the tubesheet and the heat pipe from the heat exchanger for maintenance or repair purposes.

Abstract: A single insert is provided with a plurality of curved channels extending therethrough. Such insert allows passage of a relatively large number of cables through a relatively small area of a pressure vessel wall, and the curvature of the channels prevents a straight line path for gamma radiation. The curvature of the channels (i.e. their radius) exceeds the design minimum bend radius for cables that will be passed through the insert. The ends of the insert are conical in shape to provide increased spacing for gland nuts secured in the ends of the channels.

Abstract: A wall connector for connecting a clothes dryer air outflow duct to outside ambiant air through a building external wall. The connector includes: a rigid tubular main body, extending through and mounted into an aperture in the building wall; an inner end portion, sized to fit about the dryer air duct outer end mouthpiece in substantially air-tight fashion; and an outer end portion, of double wall construction, wherein a peripheral cavity is formed thicknesswisely of said main body, the peripheral cavity defining an end mouth opening to outside ambiant air. A hood fits against the exterior face of the building wall, and includes: an inner tubular section, releasably engaging through the peripheral cavity of the connector main body, and louvers, for preventing air inflow from ambiant air into the connector main body.

Abstract: The present invention relates to a fastening system for fastening a through pipe to a hearth wall, the pipe opening into a box. The fastening system comprises external pipe-securing means for securing the pipe to said screen, and an internal metal guide tube fitted over said pipe and having one of its ends interposed between said pipe and the orifice through which said pipe passes, its other end being externally threaded. The guide tube carries a rigid washer which is disposed so as to abut against the inside face of the inside layer, and against which a wall of the box is mounted, which wall is provided with an orifice that is larger than the cross-section of the guide tube, a sealing device being clamped against the wall of the box by a nut screwed onto the threaded end of the guide tube.

Abstract: Air grid systems for distributing a gas within treatment systems such as underdrain filters and contact clarifiers is disclosed. The air grid is supported from above so that it can be lowered into position and thus modified or repaired. Additionally, this feature permits retrofitting an air grid into an existing system, such as an underdrain filter, in which the bed of media overlying the underdrain is not upset by the installation. Thus, methods of installing or retrofitting air grid systems are also disclosed. In another aspect of the present invention, the air grid is comprised of an air manifold connected to air laterals by a spreader conduit that is inserted through a smooth bore in the walls of the manifold, thereby providing a simple and easy to manufacture structure that avoids problems found in prior art components.

Abstract: A pipe coupling for casting into concrete comprising a sleeve having external flanges near its ends for attaching the coupling to formwork and a collar and seal ring mounted on at least one end of the sleeve for sealingly connecting at least one pipe thereto.

Abstract: A thermal isolation coupling system for attaching a high-temperature fluid-bearing tube to an aperture in a housing, in which a separate low temperature flow is established. Locking means attaches the tube end to the housing, in a particular desired position relative to the aperture. A tube support member connects the tube end to the locking means and facilitates positioning of the extreme tip of the tube end in the low temperature flow, in substantially non-heat conducting isolation from the aperture and the housing.