Abstract: An angular plate for connecting channel shaped flanges at the ends of ducts and including first and second legs each having substantially planar top and bottom surfaces and with an inner end portion of the first leg joined to an inner end portion of the second leg so as to establish an angle therebetween. Defined by the inner end portions is an opening for receiving a connector, the first leg has substantially parallel inner and outer edges extending between an outer end portion thereof and its inner end portion and the second leg similarly has substantially parallel inner and outer edges extending between an outer end portion thereof and its inner end portion. The outer end portion of the first leg defines structure projecting extending transversely from at least one of the inner and outer edges of at least one of the first and second legs. The projection engages a side wall portion of the duct's transverse flange to retain the plate in a desired position prior to crimping of the flange.

Abstract: A liquid manifold for connecting to adjacent pumps, wherein the manifold has two sections. Each section is independently connected to a liquid pump and threadably secured to the pump at a position which provides the most precise alignment of the respective manifold sections. The manifold sections are then affixed together by fasteners through openings in one manifold section which are larger than threaded openings in the other manifold section. The larger openings permit a predetermined amount of misalignment to be present while still permitting a tight sealable connection to be made by the two manifold sections.

Abstract: A warp beam flange assembly has a warp beam flange and a clamping ring. The clamping ring is releasably clamped, along with the flange, by at least two clamping screws onto a warp beam tube. To simplify manufacturing, the clamping ring is fastened by at least two axial fastening screws onto the flange outer surface and is supported directly on the flange outer surface by at least two rests. The rests are circumferentially offset from one another and form between them a clamping gap region in the shape of a segment of a circle. At least two axial clamping screws are circumferentially offset from each other and are located in the clamping gap region such that tightening the clamping screws in the clamping gap region reduces the space between the clamping ring and the flange outer surface and, as a result, induces flank pressure in a threaded engagement.

Abstract: Rectangular sheet metal duct sections with integral outwardly-and-rearwardly formed end flanges are conventionally made from coiled strip metal to lengths provided by the width of the coil stock, ordinarily slightly less than five feet. As is common practice, outward-and-reverse facing flanges are formed on both ends of each wall of the duct section. The spaces between the flange ends at the corners of the duct section are filled by heavier cornerpieces having arms projecting at right angles. Crimping the outstanding flanges over the corner arm portions completes a duct section. According to the present invention, a linear array of embossed surface portions is formed in the duct wall close to each outwardly projecting flange portion and beneath its reverse-facing portion.

Abstract: A track switch snow melter duct connection system including end flanges with a top portion, each end flange being attached to a distal end portion on a duct which is to be connected such that the top portion extends outward and above the distal end portion. Side flanges are also attached to each duct and extend outward such that a gap exists between the distal end portion of each duct and the side flange. The connection system also includes an attachment mechanism for attaching the top portion of end flanges on adjacent ducts and a connecting member which can be slidably inserted between adjacent ducts having an elongate channel shape formed by a base and two side legs and two extensions extending from and attached to the distal end of the two side legs. The connecting member has a width such that two connected end flanges can be positioned between the two side legs and such that the extensions are positioned in the gap between the side flanges and distal end portion of each duct.

Abstract: A corner piece for a sheet metal connector system that includes coupling members which have a V-shaped cross section and inwardly turned retaining edges spaced a given distance from the apex of the V includes a first leg which has a width slightly less than the given distance and a length, and a second leg which has a width slightly less than the given distance and a length which extends at an angle other than 180 degrees with respect to the first leg's length. The first leg may be snugly fitted between the apex of a first V-shaped coupling member and the inwardly turned edge of the first coupling member and the second leg may be snugly fitted between the apex of a second V-shaped coupling member and the inwardly turned edge of the second coupling member to join the two coupling members together at the angle. The first and second legs may be identical separate pieces which can intersect and be joined.

Abstract: A pipe flange is formed with an opening into which is fitted a pipe, and an annular groove which is coaxial with the opening and surrounds the same. A cylindrical is defined between the opening and the annular groove coaxially. A folding-back portion is led to the cylindrical portion and is adapted to retain one leading end of the pipe fitted into the opening. A pipe retaining portion is led to the folding-back portion and is folded back radially inwardly over the cylindrical portion in parallel therewith and is spaced apart therefrom by a predetermined distance. Therefore, the joining process can be simplified, and the work environment will not be contaminated. In addition, the joint strength and the air tightness can be enhanced. The pipe integral with the flange for pipe fitting is light in weight. Furthermore, the present invention is adapted for the mass production by the simple joining method.

Abstract: An electromagnetically actuatable valve including an armature with a connecting part joined to a valve element. The magnet armature is provided with at least one recess including a shoulder on which a crimped portion of the connecting tube rests. The connecting tube is provided with a thickened portion likewise resting on the magnet armature. This creates a simple connection between the connecting tube and the magnet armature which requires no subsequent machining. The electromagnetically actuatable valve may be used as a fuel injection valve for fuel injection systems of mixture-compressing internal combustion engines having externally supplied ignition.

Abstract: Joint formers for coupling between duct components having different cross-sections include a core having holes for fixing members and an opening provided with a hollowed out recess. In the opening there is formed at least one series of stepped spot-faced edges forming a series of cavities, each cavity rotated with respect to the others.

Abstract: Modifying that type of integral flange outstanding from a sheet metal duct characterized by an outstanding first width of sheet metal and a second substantially equal width bent reversedly back to extend at 180.degree. from the first, in the present flange a sheet edge margin is bent reversedly back and inwardly between the second and first such widths. As compared to prior art flanges, this results in substantially lessened deflections under internal duct pressures without appreciable increase in sheet metal used. An added advantage is that the sheet metal edge is positioned so that it cannot endanger workmen's hands.

Abstract: A corner piece for a sheet metal connector system that includes coupling members which have a V-shaped cross section and inwardly turned retaining edges spaced a given distance from the apex of the V includes a first leg which has a width slightly less than the given distance and a length, and a second leg which has a width slightly less than the given distance and a length which extends at an angle other than 180 degrees with respect to the first leg's length. The first leg may be snugly fitted between the apex of a first V-shaped coupling member and the inwardly turned edge of the first coupling member and the second leg may be snugly fitted between the apex of a second V-shaped coupling member and the inwardly turned edge of the second coupling member to join the two coupling members together at the angle. The first and second legs may be identical separate pieces which can intersect and be joined.

Abstract: A flange connection for an air conditioning duct comprises a generally L-shaped hollow flange having a pair of opposing spaced apart stay members which form multiple mechanical and adhesive seals to tightly secure the wall of an air conditioning duct in the flange.

Abstract: A pipe connection, in particular an electrically insulating pipe connection, formed by interlocking or interpenetration of material between (a) an overlapping, reinforced plastic sleeve which is subdivided into a number of superimposed pipe shells that mutually support each other and which are advantageously separated from each other and can therefore be deformed independently in the axial direction of the sleeve, and b) at least one pipe, preferably overlapped by the pipe shells or layers and made, in particular, of metal. The end of the plastic sleeve is wound, pressed or cast around the end of the overlapped pipe, and the flanges of the innermost pipe shell or layer hooks onto a shoulder at each end of the overlapped pipe. The end region of the outermost pipe shell or layer may be enclosed by a coupling ring. The flanges (1'-10') of the pipe shells (1-10) or pipe layers abut on each other, possibly via an incorporated ring (20) or ring winding preferably perpendicular to the axis of the sleeve.

Abstract: A chain intended for pipe flange connections comprising successive, cross-sectionally U-shaped chain links 8, which are hinged directly to each other and form a ring sector-like contact area 14, 15, 17 and 18. At the contact point of the chain links 8, following on to the eye ring 9, an interstice 13 is provided. Moreover, an interstice 11 is likewise provided between the two flanks 31, 32 of the U-shaped chain links 8 and the two pipes 1, 2 to be connected. The contact points of the chain links 8 are designed as level annular segmental contact surfaces 17, 18 and rest on the likewise level, chamfered outer surfaces 14, 15 of the pipe flanges 3, 4.

Abstract: An apparatus for joining flanged, abutting duct ends or for reinforcing ducts comprises an elongated coupling member including a V-shaped portion made up of two slanting walls approaching an apex and having lower portions spaced apart a given distance. It also includes inwardly turned edges on the slanting walls spaced from the apex, extensions of the slanting walls diverging from one another as the slanting walls approach the apex extending from the slanting walls a distance about equal to the given distance, and a joining portion extending from the extensions doubling back over the apex. The extensions and the joining portions have substantial parallel segments with a curved connection between the parallel segments. The edges, slanting walls, extensions and joining portion being integrally formed of sheet metal.

Abstract: A reinforced duct includes a duct section having a peripheral skin of sheet metal, a plurality of lengths of metal straps, each strap being configured to have a cross section including a V-shape portion and inwardly turned edges spaced from the apex of the V to form a gap between the edges. The straps circumscribe the duct with the apices of the V-shapes away from the peripheral skin. A plurality of screws driven outwardly through the peripheral skin into the gaps in the circumscribing straps and engage the inwardly turned edges to bind the skin to the straps so that the straps reinforce the skin to prevent excessive flexure of the skin.

Abstract: A special type of flange ring (201) for making bolted flanged joints between axially consecutive component parts of hollow fabrications, such as gas turbine aero engine casings (210). Each flange joint face (206) has, at its radially inner circumference, a radially extending sealing land or flat (216), the remainder of the flange joint face comprising, when in the unstressed condition, a frustoconical surface (209) inclined at a small angle (c.degree.) to the radial plane (207) of the sealing flat (216). The frustoconical surface (209) is drawn into contact with a complementary joint surface (208) when the bolts (204) are tightened. The flange rear face (212) is parallel to the frustoconical surface (209). This configuration creates a joint having a large line reaction force along the sealing land (216), thereby providing efficient sealing against internal pressure even when tension forces in the casing (210) are present. Alternative embodiments are described.

Abstract: A kit for constructing an expansion joint for pipes includes a flexible sleeve and at least one flange, the sleeve for being anchored to the flange by a reinforcement bead of the sleeve which reinforcement head includes an articulated chain of interconnecting elements disposed within the bead, the interconnecting elements being rotatable about one another on an axis of rotation which is substantially parallel to the longitudinal axis of the flexible sleeve.

Abstract: A duct joining system having two L-shaped connectors for each duct corner. Each connector has two substantially perpendicular legs forming a corner region and has an inside and an outside surface with the outside surface of one L-shaped connector abutting the outside surface of the other L-shaped connector when the ducts are joined. An irregularly shaped opening is formed in the corner region of each L-shaped connector in alignment with the opening in the abutting connector. A tab having an enlarged head and a stem is integrally formed with and extends inwardly from the peripheral edge of each of the openings. A score line is formed at the base of the stem of each tab on the outside surface of the connector to allow the tab to be bent outwardly about the score line so that the tab can be inserted through the opening in the abutting L-shaped connector and than bent over to lock the connectors together.

Abstract: An air conduit flange structure has a plurality of flange strip elements connected by angle connections. Each flange strip element is formed by folding a plate into an L-shape with its two opposite end edges defining a guide space, having a plurality of retainer projections and slide way portions for retaining a plurality of connecting strips which are formed in the casing of the air conduit. A shock-absorbing connector has two opposite metal end portions with a canvas connection. The metal end portions each have a plurality of raised porotrusions around its edge for fastening the two opposite end edges to the flange strip elements. Rubber strips are respectively attached to the air conduit flange and the shock-absorbing connector to protect against air leakage.

Abstract: A windage shield for use with a pair of annular members oriented in an abutting end-to-end arrangement to define one boundary of a fluid flow path, each of the members having a radially extending flange at their respecting abutting ends for coupling the members to each other. The flanges are coupled by a plurality of circumferentially spaced bolts having a head and a nut which protrude into the fluid flow path. The windage shield comprises an annular ring having a first surface with a plurality of circumferentially spaced arcuate grooves formed therein. Each of the grooves is shaped to receive a preselected number of the bolt heads when the ring is positioned against a corresponding flange. A second surface of the ring opposite the first surface includes a plurality of apertures extending through the ring to the first surface with each of the apertures being located between a respective adjacent pair of the arcuate grooves. Each aperture has a countersunk portion on the second surface.

Abstract: A duct joining system having two L-shaped connectors for each duct corner. Each connector has two substantially perpendicular legs forming a corner region and has an inside and an outside surface with the outside surface of one L-shaped connector abutting the outside surface of the other L-shaped connector when the ducts are joined. A orifice is formed in the corner region of each L-shaped connector in alignment with the orifice in the aubutting connector. A cleat is integrally formed with and extends inwardly from the peripheral edge of each of the orifices. A score line is formed at the base of each cleat on the outside surface of the connector to allow the cleat to be bent outwardly about the score line so as to extend through, and over the peripheral edge of, the orifice in the abutting L-shaped connector to lock the connectors together.

Abstract: A corner bracket 20, 120 forming part of a system of corner brackets adapted for mechanically inter-connecting in an air tight manner generally rectangular duct portions 37, 38. A first bracket 12 on the end of a first duct 37 is placed in adjacent, abutting, back to back relationship with a second bracket 6 on a second duct 38 and similarly at all four corners of the duct ends. Tabs 27, 127 which are formed from the corner bracket 20, 120 are located so as to be foldable over the adjacent, back to back brackets so as to mechanically bind the brackets together. The folding operation can be performed with hand tools such as hammers and the like. Using appropriate seals, an air tight, mechanically sound duct joint is accomplished. The brackets and the bracket inter-connection system are particularly suited for use with air conditioning duct networks.

Abstract: In the case of a flange connection for rectangular air conditioning ducts which have four walls, four flange profiles with four rectangular angle-pieces are fitted frame-wise on the end of a duct portion. The flange profiles are in this case subhstantially L-shaped hollow profiles which are in each case fitted onto a duct wall and fixed there with a plurality of spot welds. Problematical is the seal between the inner arm of the flange profile and the duct wall, because by reason of spot welds which are situated close to but at a distance from one another, air can flow out into the free atmosphere between them and over the end face of the duct wall. In order to achieve better tightness, there is formed into the hollow profile a bead extending from the front radial portion. An inner arc of the bead lies with a clamping fit on the top of the duct wall and presses it against the inner longitudinal arm so achieving a seal which it is possible easily to implement in manufacture.

Abstract: A connection for connecting an end hub (22) of a valve (10) to the flange (32) of an associated conduit (26). A bolting ring (36) has a threaded end portion (64) adjacent the valve (10), and a cylindrical smooth end portion (68) remote from the valve (10) extending radially inwardly from the threaded end portion (64). A shoulder (70) between the smooth portion (68) of the ring (36) and the threaded portion (64) acts as a stop to accurately position the bolting ring (36) onto the hub (22). Upon connection of the assembled valve structure to adjacent conducts (26), tensioning of the threaded studs (42) results in torque loads exerted by the smooth surface (68) on the locking ring (36) against the smooth surface (60) on the hub (22) for transmitting loads to the hub (22) as shown particularly in FIG. 5.

Abstract: A pipe joint assembly comprises a plate having a bore which is at least partially threaded to receive a pipe, and a guide sleeve leading to the pipe and having a larger inner diameter than the diameter of the bore. One or both ends of the guide sleeve can include an annular lip protruding inwardly to center the pipe with the bore. In another embodiment of the invention, the guide sleeve does not include either annular lip, and instead is mounted off center with the bore such that a portion of the inner surface of the sleeve is flush with a portion of a surface defining the bore to center the pipe with the bore.

Abstract: A technique for forming a pipe flange having radial reinforcement in at least the annular portion of the bolt circle uses a specially woven band of fibers. The woof fibers in the band are longer than the width of the warp fibers so that as the band is wound into the slot of a mandrel, the tails of the woof fibers bend and extend in a radial direction.

Abstract: The end of a duct section having flat sheet metal plates is bent up to form connecting flanges having an essentially hollow closed profile. Flange walls of the connecting flanges bearing the free edges of the duct section are lock-seamed into folding pockets which are formed between the duct wall and the adjoining flange wall. To connect duct sections having larger duct cross-sections, the flange walls can have outwardly extending protrusions for reinforcement.

Abstract: An improved fixing arrangement includes a planar flange having a mounting hole formed through an axial portion thereof, a radially expanded portion being formed in a portion of the peripheral surface of the mounting hole for receiving an annular resilient sealing member; and a pipe having one end provided with an pipe-diameter portion and a radially expanding annular portion. The radially expanding annular portion is engaged with the peripheral edge of the mounting hole which is formed on the back side of the flange to insert the pipe-diameter portion into the mounting hole. In addition, within the mounting hole, the end of the pipe-diameter portion is enlarged or a part of the pipe-diameter portion is radially expanded to press the resilient sealing member and to clamp the radially inwardly projecting peripheral edge of the mounting hole between the radially expanded portion and the enlarged end or radially expanded end portion, thereby fixedly connecting the flange and the pipe.

Abstract: A flange made of fiber-reinforced thermosetting synthetic resin comprises at least one flange section extending in an axial direction, which is fitted, or can be fitted, on a tubular part to be provided with a flange. The flange section joins the inside face of the flange which, together with an outside face of the flange, defines the flange. The flange has several fibre-reinforcement layers laid around each other and extending in an axial direction, and which are spirally wound up. The flange section extending in the axial direction also consists of fibre-reinforcement layers and thermosetting synthetic resin. In the region of the angular intersection between the inside face of the flange and the flange section extending in the axial direction, there is situated a reinforcement layer which prevents crack formation and which extends from the inside face of the flange to the flange section extending in the axial direction.

Abstract: Tubular components made out of quartz glass or fused quartz, such as tubes, bells, hoods, or pans, with a flange fused or welded onto them are known. To improve cooling such a tubular component, especially the sealing surfaces of the flange, heat conduction and heat radiation in the vicinity of the flange are extensively avoided and, to make it possible to create long-diameter tubular components, the flange is designed hollow and narrow-walled, whereby a coolant, preferably water or a gas, can be conveyed through the hollow space in one preferred embodiment for purposes of interior cooling or the hollow space can be packed with a heat-insulating material.

Abstract: An apparatus for joining an end of a thin metal pipe to a flange joint is disclosed. The apparatus has a flange member fastened to a base and a pipe. The flange member includes an assembly hole axially formed and an open wall constituting a hole peripheral wall. The pipe includes a collar-like protrudent wall and an expanded diameter wall which cooperate to seize the hole peripheral wall. The pipe is made coaxial with the hole formed in the base. A sealing is additionally provided between the hole of the base and the expanded diameter wall.

Abstract: Radial device for anchoring a flexible tubular structure in an opening in a rigid wall, characterized by flexible tubular structure having a bead reinforced by an armature with linked segments, embedded in rubber, composed of segments made integral by a nonrigid linking element in order to allow bead to bend in the axial direction so that it can slide into the hole in rigid wall.The invention applies to any industrial assembly, for example expansion joints, or any assembly on a vehicle, such as air suspension diaphragms.

Abstract: The box has an end wall and four side walls extending therefrom to an open end. The end wall and each of the side walls has a plurality of different size concentric geometric figures formed by grooves in one side thereof whereby the end wall and each of the side walls may be cut along the grooves to form different size openings for receiving different size conduits for the flow of air therethrough. The open end of the box is adapted to be coupled to an inlet formed through the wall of a house or building for use as a register box. A wye connector adapter plate also is provided for connection to the open end of the box whereby the box may be used as a wye connector. The adapter plate has a plurality of different size concentric geometric figures formed by grooves in one side thereof whereby the adapter plate may be cut along the grooves to form different size openings for receiving different size conduits for the flow of air therethrough.

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 flanged joint for connecting sheet material air channel sections of essentially rectangular cross section to one another has flanges made of hollow sheet material shapes and steel angle pieces. Each of the hollow sheet material shapes is provided with projections and/or depressions in one or more of the walls which entirely or partially surround a leg of a respective steel angle piece. Each leg of a steel angle piece, in turn, is provided with projections and/or depressions which are disposed at the periphery of the leg and are adjusted to the positions of the projections and/or depressions in the hollow sheet material shapes. At least one of the projections then catches in at least one of the depressions upon pushing a leg of a steel angle piece into a hollow sheet material shape.

Abstract: A device for limiting the bending radius of a submarine cable portion. The device is composed of a plurality of turbular elements (5) connected to one another in an articulated manner. Each element (5) is formed by a tubular cylindrical body (10) having two end flanges (12, 13) provided with circumferential through-holes (21, 31) for the passage of connecting members (4). One flange (12) has semi-spherical projecting members (28) in diametrically opposed positions with respect to each through-hole (21). The other flange (13) has complementary semi-spherical projecting members (28).

Abstract: The pipe (2) is inserted in the flange hole (1) and the pipe-flange seal is assured by an elastomeric ring (7), compressed inside a circular groove (4), made along the internal surface of the flange hole and by heading and expansion of the pipe inside the said hole. The internal surface of the hole may have another two circular grooves, positioned up-stream and down-stream of the first groove (4): one (3) being closed and the other (5) open on one face (6) of the flange. During heading the pipe (2) expands into the groove (3) and folds along the edge of the open groove (5).

Abstract: An assembly means for the standardized mechanical joint when used on pipeline appurtenances such as gate valves, fittings, etc., wherein the design or dimensions of said appurtenances prevent the insertion of the standardized T-bolt in one or more bolt holes. An improved fastener is inserted and tightened from the gland side facilitating the rapid assembly of said joint. Said improved fastener eliminates the need for slots on gate valves, fittings and the like, and prevents failure of the cast-iron valve body during compression of the gasket.

Abstract: A waveguide joint with flanges bonded to a waveguide section. Each flange is divided into two pieces with internal knurling and corner projections to bite into the external waveguide corners. The flange pieces are pressed on while the bonding adhesive is cured.

Abstract: The coupling together of the ends of two sections of pipes is accomplished using a pair of externally mating flanges, a plurality of nut and bolt assemblies, and a split, u-shaped positioning ring which surrounds the mating flanges. The flanges each surround the peripheral surface adjacent to a collar at the ends of the pipe sections, and have a plurality of spaced radial notches around their perimeter. The positioning ring has pairs of inwardly protruding tabs spaced about its circumference to align with the radial notches of the two flanges. Each pair of tabs has an orifice holding the loosely preassembled nut and bolt assemblies which are all slid into their corresponding notches in the flanges at once when the clamping ring is placed over the flanges. Subsequent tightening of the nut and bolt assemblies press the mating flanges together against a seal placed therebetween to prevent leakage from the coupling.

Abstract: An apparatus for sealing a pair of circularly coacting pipe flanges which includes a seal around the outer periphery of both the flanges for sealing the outer periphery and a bolt having a coacting nut extending through the bolt holes of the flange. A first sealing ferrule is positioned between the bolt head and one flange and a second sealing ferrule is positioned between the nut and the other flange. The ferrules include a conical exterior surface tapering inwardly and extending into the bolt holes for preventing the escape of fluid through the bolt holes. Each head and first ferrule and each nut and second ferrule include coacting tapered surfaces for pressing the ferrules into a sealing relationship with the bolt and flanges.

Abstract: Each of a pair of annular, especially non-circular, apertured flanges for vacuum joints are formed by machining an outer groove spaced in from the outer edge, an inner groove extending inward from the inner margin of the joint and an outward slanted side interconnecting the two grooves resulting in a sharp corner on the inner edge of the inner groove. A flange spacer, apertured to receive the bolts which draw the flanges together is positioned in the outer groove of both flanges. A soft metal (e.g., copper) gasket overlies the inner grooves. When the bolts are tightened, the gasket deforms outwardly under the pressure of the sharp corners to seal against both slanted surfaces to form an ultra-high vacuum joint which is "bakeable." For temporary testing of joints a portion of the gasket immediately overlying the corners may be replaced with an elastomeric ring.

Abstract: A connection or attachment joint between two coaxial cylindrical members having substantially different thermal coefficients of expansion. Each cylindrical member has an outstanding flange at its mating end with the end portions of the cylindrical members being separated by an annular resilient strain pad to evenly absorb radial growth between the cylinders and the flanges being held together in a manner to permit one flange to slide over the other flange as a result of thermal expansions and contractions. A torque transfer arrangement is provided to control relative rotation between the cylindrical members.

Abstract: A corner angle assembly for a structure, such as a duct work, has first and second angle pieces inserted through the respective openings in triangularly-shaped connecting flanges spot-welded to the respective walls of the structure. A first piece is inserted into its respective flange and has a contact portion extending beyond the opening in the flange. This contact portion has a groove for slidably receiving the second angle piece. The second angle piece has an upwardly-extending edge engaging the first piece for limiting the degree of insertion of the second piece. The first piece has a protruding portion bent over a beveled edge on the second piece for precluding the withdrawal of the second piece. Cooperating aligned holes in the extending portions of the respective pieces facilitate the passage of bolts or other suitable securing means.

Abstract: In order to produce butt joints between two thin-walled sheet-metal tube sections (22), a one-piece flanged ring (10) is used, which substantially comprises only a securing flange (12) protruding approximately radially outward, an arm (14) projecting from the inner end of the securing flange and a ring land (18) bent obliquely outward toward the securing flange (12) by the arm (14). The outer diameter of the ring land (18) is selected such that when it is driven into the end of the tube, it comes under pre-stressing and thus produces a stable joint between the flanged ring (10) and the tube (22). The invention also encompasses a simple method for producing the flanged ring (10), in which an elongated, flat sheet-metal strip is first folded and then is bent into annular form, and further encompasses a butt joint, having two flanged rings (10) according to the invention, between two thin-walled sheet-metal tube sections (22).

Abstract: A plastic pipe element comprises an inner one-piece liner of thermoplastic material. The liner is formed so as to include at least one cylindrical leg having a free outer end and inner end disposed intermediate opposite ends of the liner. At least one pipe section is formed comprising an inner thermoplastic lining and a fiber reinforced outer layer. That pipe section is bonded to an outer surface of the cylindrical leg such that an inner end edge of the pipe section overlies the liner. A sheet of fiber reinforced thermosetting resin molding compound is applied externally around the inner end edge of the pipe section and is subjected to pressure and heat to form the sheet into a desired shape. Thereafter, the sheet is allowed to harden. Elements formed in this manner include a T-fitting, a pipe flange, a 90.degree. fitting, a reducer fitting, a 45.degree. fitting, and a pipe cap.

Abstract: A novel seal around conduits passed through walls of fluid-containing housings embodying a stretchable annular butyl-rubber-like sheet washer stretch-fitted upon the inner end of the conduit and conformed to the inner wall portion of the housing around the conduit and held there-against by the pressure of the fluid against the washer irrespective of the contour or irregularities or material of the inner wall surface.

Abstract: A plastic pipe element comprises an inner one-piece liner of thermoplastic material. The liner is formed so as to include at least one cylindrical leg having a free outer end and inner end disposed intermediate opposite ends of the liner. At least one pipe section is formed comprising an inner thermoplastic lining and a fiber reinforced outer layer. That pipe section is bonded to an outer surface of the cylindrical leg such that an inner end edge of the pipe section overlies the liner. A sheet of fiber reinforced thermosetting resin molding compound is applied externally around the inner end edge of the pipe section and is subjected to pressure and heat to form the sheet into a desired shape. Thereafter, the sheet is allowed to harden. Elements formed in this manner include a T-fitting, a pipe flange, a 90.degree. fitting, a reducer fitting, a 45.degree. fitting, and a pipe cap.

Abstract: A flange connection for the ends of two pieces of square ducting has eight pieces of open-sided box girder, four of which are slipped out and fixed onto each of the two ends forming frames thereon. The two frames are then bolted together.For producing the desired sealing force along any two paired of the two frames, anglepieces at the frames' corners have nosepieces running out against each other so that, on screwing up the bolts tight, the middle part of the two girders in a pair are levered and bowed out towards each other for producing said sealing force. Each of the bolts is placed through a hole running through and have two legs on each anglepiece and through two wall parts of each of said box girders.