Abstract: A section of pipe includes a first body of material disposed in a bell and spigot pipe configuration having a bell portion extending to a bell end, which bell portion defines a radially inwardly facing annular seal groove in which to place a sealing ring to be engaged by a spigot portion of another section of pipe inserted into the bell portion. The seal groove is disposed between first, second, and third circumferentially-extending surfaces, the first surface facing radially inwardly and extending axially between the second and third surfaces, the second surface facing axially toward the bell end and extending radially inwardly from the first surface, and the third surface facing axially away from the bell end and extending radially inwardly from the first surface on an inclined away from the bell end as it extends from the first surface.

Abstract: A chimney liner system for insertion into a masonry chimney from the top of the chimney down to a stove or fireplace insert. If an offset or a chimney shelf exists in the chimney, a flexible metal pipe member is connected to the bottom end of the chimney liner system. A ceramic heat resistant cloth formed as a sleeve encloses the flexible metal pipe member in selected systems, and in some systems, the sleeve encloses the entire chimney liner system. In some applications, the sleeve may be made from a fiberglass cloth sewn or connected to an inner blanket insulation.

Abstract: An anisotropic pressure sensitive adhesive tape for splicing cellulosic casing which includes a highly extensible isotropic backing and a plurality of filaments arranged on the backing. The filaments are arranged to restrain the extensibility of the tape in one direction so as to produce an anisotropic tape wherein the ratio of longitudinal to transverse stretch is on the order of 10:1 to 20:1.

Abstract: An explosion-proof electrical conduit sealing fitting for threadedly engaging at least two threaded conduits and surrounding at least one conductor running through two threaded conduits includes a first element having a portion threadedly engaging at least one of at least two threaded conduits; a second element having a portion threadedly engaging at least one of the at least two threaded conduits, and connections for the first element and the second element. When properly connected and screwed into place, the sealing fitting of the present invention completely surrounds the at least one conductor and threadedly engages all of at least two threaded conduits.

Abstract: An assembly for the coupling of a multi-duct conduit system for sealing the outer and inner ducts of adjacent conduit sections in end to end relationship. There is provided a primary coupling housing which includes preferably a premolded body portion which is insertible into the outer most housing of a ducted system. The body system in the body portion comprises first and second half body portions. Each first and second half body portion is adapted to receive a plurality of ducts into bores in the body housing so that a first plurality of ducts enters and is insertible into the body portion at a first end and the second adjoining plurality of duct members are insertible into the body portion on the second end, the first and second portions of ducts being slidably engaged into the body portion and meeting substantially at a center point within the body portion, for defining a continuous pathway within the ducts for housing transmission lines therewithin.

Abstract: A tunnel or pipe section which includes a plurality of panels which are connected together to form a closed tunnel or pipe section. Each panel includes a plurality of tubular connectors which are anchored within the panel, preferably to the reinforcing members of the concrete panels, and which are connected to one another, such as by bolting through apertures in walls of the aligned connectors.

Abstract: A below ground meter box for a fluid meter includes a first sleeve for placement at the bottom of a pit in which the fluid meter is located, the first sleeve having apertures for receiving fluid conduits for the fluid meter and a second sleeve of greater axial length than the first sleeve but of substantially the same diameter; the upper edge of the first sleeve has internally an abutment edge spaced a small distance therefrom and externally a curved wall section extending above the upper edge so that when the second sleeve engages the upper edge of the first sleeve, the curved wall section will prevent lateral movement between the sleeves.

Abstract: An adjustable tube bending pattern device which is shaped to be readily and accurately formed into a wide variety of shapes so that it can be shaped to go around or avoid with sufficient clearance all obstacles, retain its shape but which can be reshaped and reused many times, to be used to form in place a precise pattern of a complex shaped tube or pipe which is then used as a pattern to accurately bend a tube or pipe to fit the intended use.

Abstract: An emergency belt assembly is provided for temporary replacement of broken fan belts and the like. The assembly comprises a tubular belt made of an elastomeric material, and a connector having a shank with a plurality of barbs on each end portion thereof. The maximum outer transverse dimensions of the barbs on each end portion of the connector decrease from the axially outermost barb to the axially innermost barb, thereby permitting the connector to be easily inserted manually into the tubular ends of the belt. In an alternate embodiment, the connector articulates at a point intermediate its end portions to permit the connector to easily accommodate small radii turns. In yet another embodiment of the present invention, the connector has a plurality of barbs on one end thereof for frictionally engaging the inner surface of a tubular end of a line or belt, and has on its opposite end portion an attachment member, such as an eye, for attaching to a support object, such as a pole, wall, or the like.

Abstract: A method is disclosed for relining buried pipeline with interconnectable plastic type pipe sections. The method comprises gaining acess to an open end of the buried pipeline, such as through a manhole, passing pipe sections down the manhole and inserting individually each pipe section into the buried pipeline open end. Each pipe section is of a length to permit, within the confines of the manhole, insertion of each pipe section into the pipeline open end. Each pipe is of a diameter to fit within the pipeline. The pipe section to be inserted is interconnected to the pipe section already inserted within the buried pipeline. Such interconnected sections are sequentially moved into the buried pipeline to permit insertion of the next pipe section into buried pipeline until the entire length of the pipeline to the next access area has been relined.

Abstract: An emergency belt assembly is provided for temporary replacement of broken fan belts and the like. The assembly comprises a tubular belt made of an elastomeric material, and a connector having a shank with a plurality of barbs on each end portion thereof. The maximum outer transverse dimensions of the barbs on each end portion of the connector decrease from the axially outermost barb to the axially innermost barb, thereby permitting the connector to be easily inserted manually into the tubular ends of the belt. In an alternate embodiment, the connector articulates at a point intermediate its end portions to permit the connector to easily accommodate small radii turns. In yet another embodiment of the present invention, the connector has a plurality of barbs on one end thereof for frictionally engaging the inner surface of a tubular end of a line or belt, and has on its opposite end portion an attachment member, such as an eye, for attaching to a support object, such as a pole, wall, or the like.

Abstract: An insulation system for pipes which includes segments of fiberglass insulation or other mineral fiber slit along their length for surrounding the pipe, a butt strip tape for sealing abutting ends of the segments of insulation, and means for sealing a flap on the insulation segment covering the slit after the pipe has been inserted therethrough. The butt strip tape is a laminated tape which includes a layer of paper, a layer of fiberglass, a layer of foil and a pressure sensitive acrylic adhesive. The means for sealing the slit may be either an adhesive film cast on a release liner and applied to the flap or a double sided adhesitve tape. The double sided tape is a laminate which has an adhesive layer on each side of a central, thin substrate. The adhesive used in all instances is an isooctyl acrylate polymer which is approximately a 100% acrylate compound having a solvent content no greater than 0.5%. The adhesive allows the tape to be applied at temperatures ranging frong -17.degree. F. to 158.degree. F.

Abstract: A joint is provided for joining together two sections of a tube wherein the sections are prestressed by a surrounding pressure medium to press the sections together and to resist forces tending to separate the sections and the bursting pressure inside the tube. The pressure medium can be a resin which can be pressurized and subsequently cured or a fluid. The outside diameter of each section, at and near the end to be joined, is enlarged. A coupling means encircles the enlarged portions and couples the two sections together. One or more expandable pressure cavities located within said coupling means and/or within the enlarged portions have the general shape of a flared annuli. The pressure medium fills and expands the pressure cavities and, when pressurized, exerts stresses compressing both sections together at the joint and also applies relatively uniform radial stress in the vicinity of the end of each section.

Abstract: A long alumina ceramic tube having good linearity is made by longitudinally joining shorter sintered alumina tubes at the ends thereof. The end of one shorter tube is ground and externally threaded. The end of another shorter sintered alumina tube is ground and internally threaded. The externally threaded end is then securely threaded into the internally threaded end. Additional tubes are similarly ground and threaded to attain the length of the long alumina ceramic tube.

Abstract: A quick-disconnect hose adapted to be coupled with a cylindrical male fitting having an outer annular bead. The hose comprises a flexible tubular wall with a female coupling element at an end region of the wall adapted to be received over the male fitting. The coupling element comprises an inner ply lining the wall at the end region, an outer ply girdling the wall at the end region, and hoop structure interposed between the wall at the end region and one of the inner and outer plies. The inner ply is formed with an annular groove adapted to receive the annular bead of a male fitting in coupling relation therewithin. The hoop structure is disposed axially outwardly of the annular groove and resists axial passasge of the annular bead of the male fitting to and from the coupling relation within the groove.

Abstract: An improved duct is proposed which comprises a plurality of duct sections coupled together. Each duct section has a turned-up portion and a flange at one end and a flange at the other end. Both the turned-up portion and the flanges are formed by bending the edge of each duct section. The turned-up portion of one tubular body is inserted into the not-turned-up end of an adjacent tubular body. Bolt holes provided in each section are adapted to align with each other by themselves. Also, the inner edge the packing disposed between the flanges is covered up by the turned-up portion.

Abstract: A soot blower lance tube having coaxially aligned sections and weld material joining the sections.

Abstract: A drill collar is disclosed having a fishing neck just behind the pin end, which has a reduced dimension compared with the box end. Hence, the tool is particularly well suited for being oriented with its pin end up in a drill string. The BSR is enhanced while the collar retains good "fishability", and "washoverability", characteristics.

Abstract: The invention provides a method for forming a composite material tube connection.On a rubber skin 1 are wound inserts 3 and 4 which form the extra thick portions required for snap fitting of the tubes, of the male end piece and of the female end piece, on these inserts and on the current part of the tube fibers 5 are wound circumferentially, on the tube is fitted a sleeve 6 previously formed, on the female end piece are bound strips 7 also formed previously, and a stop heel 10 is formed on the male end piece by a new winding.

Abstract: A submerged, self-supporting, flexible piping system for conducting fluids to and/or from a moored, floating vessel to a fixed location external of the vessel. Self-support is achieved by controlling the density of the piping walls to establish neutral buoyancy of the filled submerged piping system.

Abstract: Connecting flange portions are form fitted in one piece with an essentially hollow profile at the end of a duct wall portion of a duct section formed from sheet metal. Supporting arms of the connecting flange portions extend back to the duct wall, and are folded into folding pockets which are formed from the duct wall. To attach intermediate connectors having larger duct cross-sections, the supporting arms can have outwardly extending protrusions.

Abstract: A buried conduit consisting, in transverse cross-section, of a lower component (2) and a covering upper component (1) which bears on the upper part of the side walls (22) of the lower component (2) by means of lengthwise bearing members (3). According to the invention, the upper component (1) forms an arched vault made so as to have sufficient flexibility to distort slightly under the effect of the forces to which it is subjected, and the lower component (2) is made so as to resist, without distortion, the forces transmitted by the ground and by the upper component (1), both components being fixed to each other along the lengthwise bearing members (3) and the latter consisting of socket joints, so as to permit the bearing parts of the distortable upper component to pivot without sliding relative to the undistortable lower component.

Abstract: A refractory sheathing (1) of incombustible, compressed, flat insulating bodies (8) made of mineral or ceramic fiber for thermally insulating pipes (10) in preheating furnaces fired from below in the steel industry is described. The insulating bodies (8) have an inner and, if desired, also an outer arc-shaped profile, they enclose the pipes (10) to be insulated totally or almost totally in circumferential direction, and they are secured at the pipe in close mutual abutment by at least two retainers which engage the ends of a plurality of adjacent insulating bodies (8) forming a stack of insulating bodies. The risk of separating from the pipe during the constant vibrations of the same is reduced and the space requirement for installation at the building site as well as the cost of mounting involved are scaled down by the line-up of a plurality of insulating bodies (8) on a plurality of spaced apart rods (11) to form a highly compressed insulating body stack.

Abstract: In the progressive forming and laying of an undersea pipeline the welded joints between the ends of pipes pre-coated with a corrosion protection coating and an outer concrete weighting coating are protected by a mastic coating applied by clamping a mould around the pipeline joint to form a cavity between the joint and the mould, filling the cavity with mastic by forcing into it under pressure a charge of mastic at a temperature of not more than 70.degree. C., releasing the pressure and opening and removing the mould. The mastic coating is applied up to the level of the concrete coating adjacent the joint.

Abstract: A flexible tube exhausting pumped water into a spa tank and whipping by reaction to exhaust of water therefrom. A number of articulated plastic sleeves encircling the tube and guiding the tube to whip only in a vertical plane. The sleeves being pivotally connected to pivot about horizontal parallel axes. Adjacent sleeves having abutments limiting bending of the harness and the tube. An end sleeve being secured against rotation but being slidable longitudinally of the tube so that the harness can adjust longitudinally of the tube during whipping of the tube.

Abstract: Process and apparatus are disclosed for manufacturing foamed articles such as tubes used as pipe insulation, which tubes are of a high impermeability and flexibility and are formed of a polymer, such as polyethylene or polypropylene, containing up to as much as 50% of an elastomer.

Abstract: A drainage channel is shown which features a body having complementary ends which, in abutting relationship, form interlock with adjacent channel bodies when joining the channel bodies together; and an edge protective frame device for the upper free rims or edges of the channel side walls comprising a web resting on top of the channel side wall and two anchor legs extending downwards from and linked by the web and proceeding in the same direction and distance, at least one of which anchor legs is flush with its respective channel side wall and between the two of which legs the material of the upper part of the channel walls is formed; and a mounting leg for a channel cover, extending upwards from the outer edge of the web.

Abstract: A method and apparatus for thermal fusion of thermoplastic pipes. Heat is applied to a joint interface between thermoplastic pipes and a thermoplastic coupling at a slow rate to raise the temperature of the interface to a predetermined preheat temperature, and then at a rapid rate to quickly raise the temperature to the fusion point, resulting in proper localized fusion heating at the joint interface.

Abstract: A method for producing cylindrical hollow bodies bearing on the ground along one generatrice, of large cross sectional area, by assembling on site previously prepared longitudinal components.The method consists in determining by calculation the optimum cross-sectional profile of said hollow body as a function of known parameters concerning the site, conditions of use of said hollow body and its inherent characteristics; divising said optimum cross-sectional profile into adjacent sections each corresponding to a longitudinal component of the hollow body and together providing a substantially continuous interior surface; and giving the transverse wall section of at least some of said components a variable thickness for adapting the latter component to the stresses to be exerted thereon.

Abstract: Two tubes of thermo-plastic material are joined by a sleeve in an inner portion of which there is an electrical resistance coil, the ends of which are connected to terminals projecting from the outer surface of the sleeve. An electrical circuit supplies electric current to the coil to heat an inner weld zone to welding temperature, while leaving enveloping outer portions at lower temperature. In the sleeve there is provided a radial hole or recess into which the heated material expands upon reaching welding temperature. The material expanding into the hole or recess when welding temperature is reached is sensed by a pressure responsive micro-switch or electro-optically by an optical transmitter and receiver and through a control circuit, shuts off the power to the resistance coil. The parts being thereby fused together, are allowed to cool to complete the weld.

Abstract: A short steel pipe for use as a crack stopper is described having externally or internally helically arranged individual notches, perforations or texture changes at such a number that they overlap in axial direction, and an axial line on or in the pipe will traverse at least one of these notches, perforations or texture changes.

Abstract: Flexible tubing suitable for medical use is disclosed having a set of relatively stiff sections intercalated with a set of relatively flexible sections, each flexible section having a length no greater than twice the diameter of the tubing.

Abstract: A size-adjustable construction element involves use of channel spacers to maintain spaced parallel relationship and positive physical contact between adjacent panel members. A preferred embodiment of the invention comprises multilayered mirror insulation having an adjustment section to permit use of a standard size component to fit nonstandard dimensions and further includes channel spacers that effectively reduce convection between adjacent layers, provide positive structural support, provide a bearing surface for ease of adjustment and maintain the parallel space relationship between adjacent sheets.

Abstract: In a cyclone for the cleaning of hot gases, the center-pipe (1) is produced of curved outer and inner elements (7, 8) which are made of fireproof material. The outer and inner elements (7, 8) are suspended in a self-supporting construction in upper end elements (2), and the lower edge of the center-pipe (1) is provided with lower end elements (14), in that the individual elements are suspended within each other by means of projections (9, 9), and the upper end elements (2) are suspended in a supporting structure (16) by means of anchoring devices (13) which cooperate with grooves in the upper end elements (2). There is hereby achieved a center-pipe (1) which is capable of withstanding high temperatures, and which can therefore be used in cyclones for the cleaning of hot gases.

Abstract: A method of producing underground pipes, with pipe sections being pressed ahead into the ground. For each pipe section, at least two partial pipe shells are used which are separated from one another in the longitudinal direction, and are joined about supply lines which are guided through the pipe. The joining process is effected before the pipe section is pressed into the ground. With this method, the supply lines do not have to be interrupted when a new pipe section is introduced. The apparatus for carrying out the method is provided with at least one joining station for joining the partial pipe shells in a precisely fitting manner, and a combining station for interconnecting the partial pipe shells.

Abstract: A drainage channel is shown which features a body having complementary ends which, in abutting relationship, form interlock with adjacent channel bodies when joining the channel bodies together; and an edge protective frame device for the upper free rims or edges of the channel side walls comprising a web resting on top of the channel side wall and two anchor legs extending downwards from and linked by the web and proceeding in the same direction and distance, at least one of which anchor legs is flush with its respective channel side wall and between the two of which legs the material of the upper part of the channel walls is formed; and a mounting leg for a channel cover, extending upwards from the outer edge of the web.

Abstract: A heat recoverable article comprises a recoverable fabric and a polymeric layer of at least 0.03 mm thickness, and preferably unstressed. Such an article can be recovered by means of a torch to provide an environmental seal around substrates such as cables and pipes.

Abstract: A coil tubing string for injecting fluids into a well includes one or more tapered wall tubing sections welded in series with adjacent straight wall tubing sections to form smooth joints therebetween. The tubing string has tubing sections of dissimilar wall thicknesses. Such tapered wall tubing sections are used to connect tubing sections of dissimilar wall thicknesses wherein the transitions from one tubing section to another is smooth and continuous as one progresses from a thin wall tubing section to a heavy wall tubing section in an ascending order.

Abstract: A recoverable article comprising a recoverable fabric having a recovery of at least 40% may be used for providing environmental protection.

Abstract: A method for joining insulated conduits is disclosed, in which the bared ends of the medium-carrying pipes are first interconnected in a per se known manner and a union piece is thereafter placed around the resulting joint, such that the union piece has an overlap on the outer side of the conduits to be joined and forms a mould for foaming an insulating material of cellular plastic in the joint. The union piece is a relatively rigid, circumferentially resilient plastic tube which is slotted throughout its entire length and, before being applied around the joint, has an inner diameter which is smaller than the outer diameter of the conduits. After the union piece has been applied around the joint, a strip is placed on the slot of the union piece throughout substantially the entire length of the slot, said strip consisting of a mouldable, curable plastic material which by curing is bondable to the union piece, and which is thereafter cured so as to be bonded to the union piece.

Abstract: A flexible drill pipe adapted for connection in a drill string, having sufficient wall thickness in order to withstand forces imposed by drilling a well. The flexible pipe has a plurality of cuts defining interlocking teeth and recesses on axially adjacent segments of the pipe, the teeth in one segment being positioned in the recesses of, and interlocking with the teeth of, the adjacent segment. Each of the teeth includes a generally semicircular crown section, two essentially flat shoulders and a tapered base portion, with the curved, tapered sides of circumferentially adjacent bases forming the semicircular recesses for receiving the crowns of axially adjacent interlocking teeth.

Abstract: An insulation system for pipes which includes segments of fiberglass insulation surrounding the pipe and tape sealing abutting ends of the segments of insulation. The tape is a laminated tape which includes a layer of paper, a layer of fiberglass, a layer of foil and a pressure sensitive acrylic adhesive. The adhesive is an isooctyl acrylate polymer which contains no fillers, except for a cross linker. The tape may be applied at temperatures ranging from -17.degree. F. to 158.degree. F.

Abstract: An article comprises two areas of heat-recoverable woven fabric which are joined together along a line by means of a mechanical joining arrangement, such as stitches, staples or a stitched or stapled zip, which penetrates the fabric. The direction of crimp of the area penetrated is substantially perpendicular to the line of the join, or the two areas have substantially parallel directions of crimp.

Abstract: An insulated chimney pipe for use with boilers or open fires has a plurality of sections comprising an outer wall of galvanized steel connected by two end caps to an inner wall formed of a refractory material comprising alumino-silicate fibres bonded together with an inorganic colloidal bonding agent.

Abstract: Ventilating unit comprising a housing to the front of which is fitted, preferably pivotably, a cover-flap. The front of the housing comprises a wall that closes off the interior in which a fan is arranged. Known ventilating units of this kind contain, inside, a plurality of components, more particularly a fan, insulating material, an actuator, etc. These components have hitherto been secured to the housing, and to each other, by means of screws or other attachment-elements, resulting in relatively high material and assembly costs. Furthermore, cleaning of the ventilating ducts, involving opening-up the unit, has been possible only by using trained personnel. In order to overcome this problem it is therefore suggested that the wall be built as an inspection-flap which is hinged to the front edge of the housing and is provided with means for locking it to the housing.

Abstract: An airtight telescoping rigid conduit is disclosed which includes rigid tubular sections which are coupled together using multiple bearings and a pressure actuated resilient seal ring. The tubular sections are constructed with a heat insulating foam core to minimize losses to, or gains from, the atmosphere. The conduit is designed to be attached to a telescoping passenger loading bridge which connects an airport terminal to an aircraft. The conduit provides preconditioned cooling or heating air from the terminal to the aircraft.

Abstract: Tubular body of fused quartz and quartz glass with a seamless transition from the fused-quartz zone to the quartz-glass zone. The body is manufactured continuously in a hollow rotating metal cylinder by disposing silica against the rotating mold and adding thereto, such as in an annular zone therein, rock crystal or synthetic silicon dioxide and fusing the rock crystal or synthetic silicon dioxide to the fused silica whereby no seam is formed.

Abstract: An elongated tubular member for use in connection with a subterranean well, such as deep bore oil well, is comprised of at least two annular layers which may be bonded together. The first annular layer is comprised of a fiber reinforced organic resin material and the second layer is comprised of a refractory material. The two layers combined to provide an inexpensive, lightweight tubular member having relatively high compressive strength.

Abstract: Insulated pipes are generally bared of insulation at their ends in order to make joints, for example welds, between the pipes. A reinsulating method and assembly is provided for the bared joints, wherein a support comprising a coiled member, for example a helical coil, is positioned around the pipe, a recoverable cover recovered into engagement with the support, and thermally insulating material introduced between the cover and the pipe. The invention is suitable for straight, T, and bent joints.

Abstract: This invention relates to composite gun barrels along the lines that a bal be made of two or more different materials and of different outer diameters for optimum life and performance at different points along the length of the barrel. A composite gun barrel according to this invention includes a breech joined to a muzzle through a mid-section of the barrel by inertia or friction welding. Such a breech, muzzle and mid-section or mid-sections are made of different external diameters and wall thicknesses and of varying materials. A material more resistant to high temperature erosion and of larger outside diameter for high gas pressure is utilized at the chamber, while the material and wall thickness selected for use near the muzzle is optimum for frictional wear and lower pressure. A hot work tool steel such as H11 containing 1.5% Mn, 5% Cr, 0.4 V and 0.35 C is employed at the origin of rifling.