Abstract: Coupling apparatus for replacing a core spray line downcomer pipe coupled to a shroud T-box are described. In one embodiment, the coupling apparatus includes a seal ring, a mating flange, a housing having at least one wedge pocket, at least one coupling bolt, at least one wedge and at least one lateral pin. After extending the downcomer pipe into the housing, the seal ring is inserted into the opposite end of the housing adjacent the downcomer pipe. The seal ring is then seated on the mating flange seat. The two seats allow the downcomer pipe to be rotational misaligned with the coupling apparatus. The coupling bolts extend through the mating flange and the housing to rigidly secure the downcomer pipe to the coupling apparatus. Lateral pins extend through the housing and the downcomer pipe to provide vertical and torsional load transfer from the downcomer pipe to the coupling apparatus.

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: A strainer apparatus capable of being installed within an Acme type coupling of the kind used in a pipe connecting a transport gas tank to a gas storage tank comprises a perforated disc and a retainer ring. The outer surface of the retainer ring has a smooth portion and an adjacent knurled portion. The disc acts as a strainer and is permanently fixed inside of the Acme coupling by means of the retainer ring knurled portion being press fitted against the inner surface of a coupling counterbore within which both the disc and ring are installed. The Acme coupling after being fitted within the strainer disc is installed in the pipe line leading between a gas transport tank and a gas storage tank to prevent debris from being pumped through the pipe coupling and towards and possibly to the gas storage tank.

Abstract: For nozzle replacement, repair and initial installation in ASME pressure vessels, disclosed are nozzles, nozzle assemblies and nozzle repair assemblies, all of which are mechanically attached and mechanically sealed to the vessel, i.e., without any welding to the vessel, and in most embodiments without any welding at all. For nozzle replacement, a part or the entire existing nozzle is removed and a partial or full replacement nozzle or nozzle assembly is mechanically attached and mechanically sealed to the vessel. For nozzle repair, the existing nozzle within the bore is not removed, and a mechanical seal is provided for the existing nozzle which may also be welded or mechanically attached to the repair assembly.

Abstract: A mechanical coupling device for selectively connecting and disconnecting an apparatus to a thermal source. The coupling device includes a thermal bridge element comprised of a flexible structure having a first coefficient of thermal expansion, and a thermal stress element disposed about the thermal bridge element with the thermal stress element having a second coefficient of thermal expansion. The difference in coefficients of thermal expansion act to cause stressing of the thermal bridge element into thermal contact with the apparatus.

Abstract: An exhaust device for an internal combustion engine with an exhaust pipe having a two pipe structure arranged such that the outer pipe and the inner pipe touch each other, the inner pipe being divided into first and second inner pipe sections at a location along the length of the inner pipe. The first and second inner pipes are arranged so that their facing ends are separated, in order to absorb shifts caused by thermal expansion of the pipe. The ends of both the outer pipe and the inner pipe are affixed together. The outer pipe may also be divided into first and second outer pipe sections at a location along the length of the outer pipe. The first and second outer pipe sections are joined in a telescopic joint.

Abstract: A connecting yoke apparatus is disclosed for attachment to a valve of a compressed gas cylinder. The apparatus includes a yoke member having a first and a second end, the yoke member defining an opening for the reception therein of the valve. A connection extends through the first end of the yoke member for selective connection with the valve. The connection selectively cooperates in fluid tight communication with the valve when the valve is disposed within the opening. A piston is slidably disposed within the yoke member for selectively urging the valve and the connection towards each other such that when the piston is in an operative disposition thereof, the fluid tight communication between the connection and the valve is generated and when the piston is in an inoperative disposition thereof, disengagement of the yoke member from the valve is permitted.

Abstract: A thermal expansion-absorbing structure for piping, which is attached to a pipe end, is provided. A semicircular form of torus shell is joined to a cylindrical form of short double pipe to define together a U-shaped longitudinal section, which is deformed due to the expansion or contraction displacement of the pipe, thereby absorbing thermal expansion. This achieves a piping reduction, compactness of a reactor building and a reduction in the construction cost of a fast reactor plant, and ensures great safety.

Abstract: A novel S-shape web section in a dog bone style expansion joint belt, having a very significant increase in the ability to define a successful seal even in misaligned or otherwise off-specification expansion joint environments. The web section has the potential of significantly increasing belt service life in contrast to a conventional OEM belt, due to lower stress levels at finite element locations proximate to the mid-span, and particularly on the convex inner surface of the belt during high vacuum situations. The web preferably has only 3 layers of polyester or nylon fabric, each with an intermediate skim coat of neoprene rubber, to bond the fabric plies together and also to bond the fabric core with an outer covering of black neoprene rubber or Viton rubber. The fabric plies may extend longitudinally inside of the end knobs or be splayed outwardly inside of each end knob to avoid need for a separate cord or a cord and a key.

Abstract: Two components such as pipes having radial end flanges with conical flange clamping surfaces are clamped together by a clamping ring having at least two ring sections with conical ring clamping surfaces engaging said conical flange clamping surfaces when clamping screws passing through section ends are tightened. The ring sections have an inner ring radius (RR) slightly larger than a respective flange radius (FR) for providing a positive but gradual engagement between said conical surfaces when said ring sections are clamped together for example by threaded bolts or screws at ring section ends.

Abstract: An exhaust gas diffuser interface includes a stainless steel shell with varying levels of insulation. The varying levels of insulation concentrate thermal expansion and contraction at the turbine outlet end allowing it to be connected to the outlet by way of a seal weld. This construction allows expansion and contraction of the diffuser interface in unison with the attached turbine outlet, as well as the diffuser inlet.

Abstract: An annular clamping flange for use in clamping a first pipe end portion to a second pipe end portion in an engine exhaust system, has first and second arcuate flange portions co-operable to form a pipe receiving aperture, each flange portion having at least one clamping bolt receiving aperture with a longitudinal axis parallel to the longitudinal axis of the pipe receiving aperture. The annular flange having an outer periphery of generally parallelogram shape with a pair of opposed acute angles and a pair of opposed obtuse angles, the parallelogram shape having rounded corners, one flange portion providing one side and portions of sides of the parallelogram shape adjacent thereto, and the other flange portion providing the opposite side to said one side and the other portions of said adjacent sides, each flange portion having a connecting bolt receiving tubular lug on each said adjacent side portion thereof.

Abstract: A firestop conduit element is formed of an inner conduit of fusible material surrounded by intumescent material which is contained within an exterior moisture impenetrable barrier. A preferred barrier is an external sleeve, bonded at its ends to the conduit. The ends of the conduit element are coupleable to exterior conduit systems.

Abstract: The invention disclosed herein provides nozzles for vessels such as a pressurizer vessel, reactor vessel or piping in a nuclear power facility, and methods for attaching and sealing the nozzles to the vessels without any welding at all, i.e., without using a structural or seal weld. The nozzles are clamped or bolted to the vessel or attached by an interference fit, and a mechanical seal is obtained using gasket material and/or contacting, preferably polished, metal surfaces. Some embodiments of clamping the nozzle to the vessel comprise tightening a nut on the threaded end of the nozzle projecting from the bore in the vessel against the vessel, and structure which prevents the nozzle from being withdrawn through the bore, thereby clamping the nozzle against the vessel. Another embodiment of clamping a nozzle to the vessel comprises a sleeve threaded in the bore and forcing an interfering portion of the nozzle body into engagement with the bore.

Abstract: A tube-fitting assembly includes a formed tube, first and second threaded fitting members, and a sealing member. The tube has a first annular bead near an end of the tube and a second annular bead outboard of the first annular bead. The first threaded fitting member surrounds the tube and has a radially inwardly extending first shoulder inboard of the first and second annular beads. The second threaded fitting member has an annular second shoulder at an acute angle to a longitudinal axis of the tube. The second fitting member surrounds the end of the tube and is in threaded engagement with the second threaded member such that the second shoulder engages an outboard side of the second bead to establish a first seal between the tube and the second fitting member against leakage of fluid pressure.

Abstract: An expansion joint connecting the ends of two pipes adapted to convey a hot fluid, each end having an end flange, includes a sleeve fastened at its respective edges to a cold flange fastened to a nesting device and a coupling arrangement connecting the end flange and the corresponding cold flange. The coupling arrangement comprises at least two members connected together, one fastened to the cold flange and the other fastened to the end flange. A first member is a corrugated sheetmetal sleeve the undulations of which are parallel to the longitudinal direction of the pipe and a second member is flexible and deformable in the longitudinal direction of the pipe.

Abstract: High temperature ceramic nut of aluminum oxide for use in coupling a flared tube to a flare fitting.

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 protective seal and method for protecting flow line joints from leakage of fluid conveyed thereby when exposed to elevated temperatures, such as fire, employs the use of intumescent material and a channeling structure for channeling the intumescent material into a separation gap caused by thermal separation of adjacent flow line pieces, e.g., pipe sections. The channeling structure may be a channel formed in the connecting flanges, or in a gasket interposed between the pieces. Alternatively, the channeling structure may be an annulus for directing the intumescent material radially inwardly into the separation gap or a channeling strip in a spiral wound gasket. Where a channel is provided in the flange or gasket, a seal element may be used, and the intumescent material material provides a driving force to advance the seal into the separation gap. The intumescent material material may be bounded by a diaphragm or contained within a bladder.

Abstract: A gasket seal comprises a hollow metallic annular member with hollow interior filled with a thermally expanding material and exterior surface surface thereof lined with a resilient layer of sealing material; wherein the contact pressure between the resilient layer of sealing material and metallic surfaces sealed by the gasket seal, that is imposed by the fastening employed in joining the metallic surfaces, provides the sealing under normal conditions, while the additional contact pressure exerted by the thermal expansion of the thermally expanding material contained in the hollow metallic annular member as a result of an elevated temperature provides the sealing in case of fire.

Abstract: An improved welding rod having a solid homogeneous core of thermoplastic material and a resistance element comprised of a plurality of wires is presented with a method and apparatus for forming the welding rod. The welding rod is positioned between members of the thermoplastic material to be welded and a current and pressure is applied to the resistance element causing the thermoplastic material of the solid core and the adjacent thermoplastic members to fuse and form a unitary weld. Simultaneously the electrical resistance element is embedded in the weld, mechanically reinforcing and strengthening the connection. There is also disclosed a method for electric fusion welding of thermoplastic members wherein the welding rod is pre-attached to one of the thermoplastic members.

Abstract: A conduit assembly, in particular for connecting a flue gas inlet of a gas turbine to a flue gas conduit discharging into a waste heat boiler, includes an outwardly insulated first conduit segment having a supporting inner casing, and an inwardly insulated second conduit segment having a supporting outer casing being radially outwardly offset from the supporting inner casing of the first conduit segment. The supporting casings each have a flange-like structure and are form-lockingly joined together in a connection region between the conduit segments. A connecting element for the conduit segments includes a shaped element surrounding the first conduit segment and being firmly joined to the supporting outer casing of the second conduit segment. The shaped element has a number of radially extending ribs with free ends being form-lockingly joined to the supporting inner casing of the first conduit segment.

Abstract: High temperature ceramic nut of aluminum oxide for use in coupling a flared tube to a flare fitting.

Abstract: An anti-rotation bracket for restraining rotational and axial movement of an oil supply tube in an aircraft gas turbine engine during assembly and disassembly of a flanged connection between segments of the tube. The bracket includes a leg which extends about an adjacent stiffening ring of the turbine frame, a body portion having a substantially U-shaped channel opening to the leg for positioning the bracket around the oil supply tube, and a plurality of elongated holes passing through the body portion for clamping the bracket to the oil supply tube flange by the screws which attach the flanges together. The leg preferably includes spaced walls which receive a portion of the ring therebetween and provide clearance to allow for movement of the tube as a result of thermal expansion.

Abstract: A jacketed jet radiant heater for an industrial process furnace as a frame tube composed of axially aligned pipe pieces abutted on one another that are held together by clasps on the outside of the flame tube that have studs which protrude into holes in adjacent pipe pieces and have a head portion which serves to center the flame tube within the jacket tube. The clasps make it possible to provide exhaust gas releasing slots between some of the pipe pieces of the flame tube and thereby avoiding local overheating of the jacket tube.

Abstract: A method and article for microwave bonding of thermoplastic pipe such as that used in the distribution of natural gas. The article is a composite bonding material (CBM) having a thermoplastic matrix (preferably polyethylene) which is miscible with the thermoplastic material of the pipe, and a plurality of microwave susceptor particles dispersed throughout the matrix. The preferred susceptors have improved heating properties whereby the total amount of metal oxide material in the CBM is about 1/10 of 1% by weight. A strip or sleeve is fashioned from the CBM and may be used, with or without a coupling, to join two pipes or repair ruptures. The method includes positioning of the article at the pipe joint or rupture, and application of microwave energy in an amount sufficient to heat the susceptors and cause both the CBM matrix and the adjacent portion of the pipe to melt and flow together, thereby producing a fusion bond.

Abstract: An injector assembly is provided for use with a high heat, high pressure bustion chamber which utilizes a highly corrosive fuel. The injector assembly includes a ceramic injector which has an annular ceramic flange. A metallic retaining apparatus is provided which includes a pair of retainer plates and a tightening device. In a preferred embodiment one of the retainer plates is a retainer ring. With this arrangement the ceramic flange is clamped between the retainer ring and the retainer plate by the tightening device. The retainer ring is provided with an annular groove. An annular spring is disposed within the groove in engagement with the ceramic flange. Because of the different coefficients of expansion the metal of the retaining apparatus will expand away from the ceramic flange when the combustion chamber is operated. When this occurs the annular spring will expand to maintain a high integrity seal between the injector assembly and the combustion chamber.

Abstract: An engine exhaust conduit sealed joint having controlled axial expansion between two telescopically interfitted ducts with a slide seal therebetween, and the ducts held by first and second clamp connectors, one of the ducts having an annular shoulder and one of the clamp connectors being hat-shaped to extend axially on both sides of this shoulder with an annular stop surface to engage the annular shoulder. The seal has an arcuate cross section in engagement with the outer periphery of the one duct, and having a pair of opposite, annular, diagonal surfaces, one of which is engaged by the one clamp connector and the other of which is engaged by a flared end of the other duct which in turn is engaged by the other clamp connector.

Abstract: A snap-on device for butt connecting in fluidtight manner one or more pairs of pipes, in particular vehicle fuel supply pipes. The device consists of a cup-shaped body having at least a first integral pipe connected hydraulically to a seat inside the body; and a block connectable inside the seat and molded on at least a second pipe, so that the end of the second pipe projects frontwards of the block in the insertion direction of the block inside the seat. The seat presents a recess coaxial with the first pipe and designed to receive the projecting end of the second pipe in sliding and fluidtight manner; and releasable locking structure for locking the block inside the seat, while at the same time permitting axial movement of the block and the projecting end of the second pipe inside the seat and recess respectively.

Abstract: Fittings made of copper, brass, red brass or steel are provided with an inside coating of a flux and a solder layer. By this technique, the soldering process is simplified, damages caused by overheating of the flux are avoided and the amount of the solder used is reduced.

Abstract: A tensioned fire damper assembly and method are disclosed. The assembly includes a damper tensioning frame for tensionably mounting a fire damper within a duct or other mounting aperture, thereby allowing substantially unrestricted thermal damper expansion into an expansion gap located between the aperture and the tensioning frame. Screw type tensioning fasteners can be employed to tensionably mount the frame, and the degree of frame tension can be regulated by using tensioning fastener bushings which limit the threadable movement of the fasteners. Additional embodiments are disclosed in which multiple dampers can be accommodated in a tensionable frame.

Abstract: An improved apparatus for connecting first and second conduits having first and second bores, respectively to provide communication between the first and second bores which may be used with temperatures and/or wide variations in temperature. While a biasing element is used to provide a sealing ferrule with sufficient force to seal the second conduit, a ferrule forming screw may be used to form an initial seal if a conduit is used that is undersize with respect to the ferrule. A quick-lock adaptor is also attached to the base of the connector which adapts the connector for use with standard tubing fittings.

Abstract: A flexible coupling device for sealably connecting together first and second tubular bodies which are subjected to pulsing pressures and to thermal expansion and contraction. The first tubular body includes a first tubular portion having a cylindrical end and a flange and the second tubular body includes a second tubular portion having a planar mounting surface. The flexible coupling device includes a guide ring disposed in telescopic relation with the cylindrical end of the first tubular body, a flexible bellows having first and second attachment ends, a first retaining ring for releasably securing the first attachment end of the flexible bellows to the flange and a second retaining ring for releasably securing the second attachment end and the guide ring to the planar mounting surface of the second tubular portion.

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 means is disclosed by which the operational temperature of a sealed relatively rotating device may be achieved at lower than recommended operational temperatures for the elastomer compound used as the sealing material.

Abstract: A casing around a turbine and a casing around discharge nozzles have a concentrically arranged shell portion. The seal contains internal pressure while accommodating eccentric, expansion and axial travel. Arcuate seal segments have one leg sealing against a radial surface extending from the inner shell and the other leg against the outer shell. A linkage guides travel of the segments.

Abstract: A multiple duct conduit system (10) includes conduit sections with elongated outer ducts (18) and inner ducts (19) are disposed therewithin and the conduit sections are connected in end-to-end relationship for carrying fiber optic cables and the like. The inner ducts (19) are formed of a material having a coefficient of thermal expansion which is different from that of the outer ducts and the inner ducts expand and contract with respect to the outer ducts as temperatures change. Couplings (16) connect the ends of the conduit sections and define passageways (31-34) constructed with expansion chambers (48) to accommodate changes in the lengths of the inner ducts (19) with respect to the outer ducts (18).

Abstract: A gasket is formed by encapsulating a thermally conductive low melting temperature material or core in a plastic skin. The low melting temperature material conforms to the shape of the interface completely filling all voids once heated above its melting temperature. Since the low melting temperature material is encapsulated in a plastic skin, there is no danger of contaminating parts of the assembly. The gasket is easily applied and removed in all applications, is re-usable, and the thickness can be as thin as 0.010 inches.

Abstract: A refractory pipeline having ceramic pipe sections with joints therebetween located at areas where in which there are the greatest temperature differences in the pipeline. Adjacent pipe sections are connected together by shoulders at the ends of each such section, the shoulder of one pipe section being radially outside the shoulder of an adjacent section. A further pipe section is pushed over the joint so as to form a gastight seal by defining a space in communication with a borehole through the one shoulder and a peripheral groove in the other shoulder. A pressure cushion is provided in the space by applying a barrier medium under pressure to the space and thereby through the borehole to the peripheral groove.

Abstract: A low tolerance joint connecting a pair of hollow refractory bricks, e.g., center riser bricks, runner bricks, etc., together for carrying molten metal, e.g., steel, therethrough. Each brick has a pair of ends with a central passageway extending therebetween. One end of one brick comprises a conical walled annular flange projecting therefrom and a shoulder extending about the annular flange. One end of the other brick comprises a matingly shaped circular recess and shoulder extending about the circular recess. The joint comprises the interface between the adjacent surfaces of the annular flange and recess when the flange is located therein. The interface thus formed is an elongated space, free of mortar or other sealing material, into which the molten metal flows to freeze therein and thereby form a seal precluding its egress from the passageway to the ambient surroundings.

Abstract: A connection arrangement between the holding tank and the heating tank in a boiling water unit in which a transfer pipe extends between the heating tank and the metering tube through which water is transferred from the holding tank. The transfer pipe is of Teflon construction and is elevated and internally chamfered at its end which extends into the heating tank. Connection joints are provided where the transfer pipe enters both the heating tank and the metering tube and each connection joint houses an expansion joint incorporating an O-ring and lubricant.

Abstract: A plastic quick-connect connector for connecting a plastic tube or fluid line to a connector stem. A elastically expandable plastic compression sleeve is slid over the end of the mating plastic tube or fluid line. The connector stem receives the plastic tube and surrounding compression sleeve the stem to expand the plastic tube and the tightly surrounding compression sleeve radially outwardly into a gripping relationship with the stem therebetween. The compression sleeve is of a material which does not relax at elevated temperatures on the order of 350.degree. F. This arrangement prevents creep or relaxation of the plastic tube or fluid line which, in turn, prevents an undesired pull-off, or separation of the completed connection.

Abstract: In a construction for joining a copper tube (20) to a steel body (10) which may be part of a device such as an accumulator used in an air conditioning system, the copper tube is passed into an opening (14) in a wall (12) of the steel body. The opening in the steel body is bounded by a neck projection (18) which extends outward therefrom. A copper collar (24) includes a first portion (26) which accepts neck projection (18) of the steel body. A second portion (28) of the copper collar (24) accepts the copper tube. A mass (34) of brazing material is positioned in the collar in a tapered transitional portion (30) between the first and second portions of the collar. When the body, tube and collar are assembled and placed in a brazing furnace, the brazing material melts and flows by capillary action between the first portion of the collar and the outside of the neck projection of the steel body. The brazing material also flows between the second portion of the collar and the tube.

Abstract: An improved throttle modulator assembly and a thermoplastic fluid direction tube for insertion into a throttle modulator assembly are disclosed. The thermoplastic fluid direction tube is annular and hollow and is made from a thermoplastic material having a coefficient of thermal expansion about the same as the throttle modulator body. Further, an annular press ring and at least one associated press wing extending axially therefrom are located along the longitudinal dimension of the end tube portion of the thermoplastic tube.

Abstract: This invention relates to a coupling involving two components butting one on the other under preload via at least one mating surface, where a coupling sleeve overlapping the two components in the area of the mating surface lodges against the first component via an abutment and the preload is transmitted to the second component via a welded joint. In this manner the components are joined together in a heat-resistant, inseparable, small-bulk and low-weight connection that can be gas-tight if the mating surface and the components are designed accordingly and that is feasible also when the components are made of materials that do not permit brazing or welding them together or cold or hot forming.

Abstract: In one manufacture of a preform rod from which optical fiber is drawn, chemical materials are moved into a rotating preform tube to which is applied a moving zone of heat. Following a deposition mode, the tube is collapsed to provide the preform rod. Provisions must be made to supply the deposition materials from a rotating supply conduit into the rotating preform tube without leakage and without the ingress of contaminants while an end portion of the tube is gripped securely. This is accomplished by providing non-metallic ferrules about an end portion of the preform tube which are caused to be clamped against the end portion of the preform tube in sealing and gripping engagement therewith.

Abstract: A method of constructing a fire-stop collar assembly involves the steps of choosing a dummy pipe (14) at a factory which is an approximate size and shape of a pipe at an installment site on which a fire-stop collar assembly (10,54) produced by this method is to be mounted and, at the factory, wrapping an intumescent collar (34,82) into an approximate ring about an outer surface of the dummy pipe. Also, at the factory, a metallic band (32) is wrapped about the intumescent collar while the collar is wrapped about the dummy pipe and the end portions (36,38) are held together by a fastening device (40,56) while the collar is wrapped about the dummy pipe. Still at the factory, the dummy pipe is removed from the intumescent collar and the metallic band by longitudinal movement along the dummy pipe, thereby leaving rings of intumescent collar and the metallic band held together as an integral fire-stop collar assembly.

Abstract: A device for supplying feedwater to, and conveying feedwater from, a shaft tube assembly (20,22) of a machine having a rotary part, which assembly (20,22) has a longitudinal axis about which the assembly (20,22) rotates together with the rotary part, the device being composed of a housing which includes a cylindrical casing (2) having a cylindrical passage extending between its axial ends and a lateral feedwater passage (6) communicating with the cylindrical passage, a conduit member (8) having a second feedwater passage (10) and coupled to one axial end of the casing (2) to form a sealed joint with the casing (2), the conduit member (8) being positioned relative to the casing (2) such that the second feedwater passage (10) communicates with the cylindrical passage, and a closing member (12) coupled to the second axial end of the casing (2) to form a sealed joint with the casing (2), the closing member (12) having a circular opening coaxial with the cylindrical passage of the casing (2 ), the housing being co

Abstract: A design for sealing metal-to-metal, of sections of rocket shell with fusible vitreous inorganic "glass-ceramic" compositions, which will not burn-out from high temperatures of rocket-exhaust, is disclosed. The design is intended to set up a thermal-gradient across the cross section of the sealed metal flanges. The thermal-gradient utilizes the useful property of the vitreous state of the seal, viz., the continuous viscosity change from the relatively low viscosity of molten glass at high temperature, to a very high viscosity of almost solid state at lower temperatures. This mechanism achieves a leak-proof "glass-ceramic" or glass seal between the metal flange joints of sections of rocket-shell. The vitreous seal is capable of withstanding a wide range of temperature inside the rocket, of -50.degree. C., to over 1000.degree. C., without failure when the rocket is fired.

Abstract: A labyrinth seal for sealing the gap between the rotating impeller assembly and the stationary housing of turbomachinery comprising a seal holder which serves simultaneously to comprise the stationary part of the seal and to contact process gas so as to maintain the stationary seal part temperature at about the temperature of the rotating part, thus reducing differential thermal change between the stationary and rotating members of the labyrinth seal.