Abstract: The sum of the areas of the sections of the operational ingates 30 of the mold 4 is, at least at the time of casting, greater than the area of the section of the vertical casting chamber 28, or at least approximately equal to it. This makes it possible to slow the molten metal as it flows into the ingates, and thus to obtain a non-turbulent filling of the impressions or cavities 29.

Abstract: To lock a pipework joint in place, a locking device 5 rests on a flange 4 mounted on the socket end of one of the pipes. The flange has, over at least one portion of its periphery, a radial L-shaped cross-section, the concavity of the L being oriented radially inwardly and mating with a complementary contour on the end of the socket.

Abstract: The upper surface of an interconnecting wear device 3 is positioned in contact with the lower surface of a sand mold 1, and is centered under a molten metal feed shaft 12 which opens into the bottom of the mold. The bottom surface of the wear device rests on the upper surface of a vertically upstanding casting nose 4. The wear device comprises a hollow steel collar 7 surrounding a compressed concrete annulus 18, in turn surrounding a refractory clay sleeve 8, and is easily replaced when leakage develops due to thermal shocks, etc.

Abstract: Quickly dismountable foundry mold positioning and clamping equipment installation. The casting station, positioned on the molten metal feed spout 16 of a supply crucible or furnace, comprises a sand mold 2 supported by a frame 1 and having a melt passage 3 opening facing downwardly, a mechanism 4 for implementing side-travel transfer of the frame, a suspension jack 18 mounted in the transfer mechanism, and a clamping jack 12 for urging the mold against support ledges defined by rotatable tappets 8 carried by the frame.

Abstract: A mold containing a gasifiable or vaporizable disposable pattern 3, embedded in sand 4 without a binding agent, is fed through its base by a pressurized chamber 6 containing liquid cast metal. The pressure in the chamber 6 is regulated as a function of the surface area/volume ratio of the disposable pattern 3 to prevent the emergence of high-gloss carbon.

Abstract: An annular elastomeric gasket (3) for a female pipe socket includes locking elements (E) having an outer extremity 15 intended to bear against an inner surface of the socket and an inner extremity 18 intended to penetrate the outer surface of a male pipe end. The locking elements have shoulders (21) for limiting their penetration into the male pipe.

Abstract: Friction patches 7 are fixed on the metal core 1 of a shutter of a disc valve. The core comprises at least one seating 3 intended to accommodate a friction patch 7 provided with deformable fingers 8 which permit its accurate positioning on the core and its mechanical attachment on the disc via an injection elastomer 2.

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

Abstract: An elastomer packing 2 for male/female pipe joints is fitted with peripherally distributed, inserted or embedded locking elements E having a "seven" or T shape. The insertion of the male pipe into the female socket compresses the packing to establish a seal, and rotates the locking elements inwardly. Any withdrawal movements of the male pipe are halted by the counterrotation of the locking elements, whose beveled inner edges bite into the male pipe surface in a wedge like manner.

Abstract: A manhole assembly includes a circular cover 4 seated in a frame 1 and removably hinged thereto by a T-shaped lug 16 extending radially from the cover and lying within a matingly configured receptacle 5 defined in an upper edge of the frame. Lips 9 overhang opposite interior ends of the deepened receptacle trough 7 to restrain the pivot shaft 18 of the lug against vertical removal with the cover closed, in which position the lug has no contact with the receptacle surfaces to avoid clanking noise upon the passage of a vehicle.

Abstract: The invention concerns a method and apparatus for thermally treating cast-iron pipes formed in a continuous casting die. The pipe or tube undergoes tempering by passing through a vat which is located downstream from the continuous casting die. The vat contains a continuously cooled bath of fluidized sand or the like which lowers the temperature of the tube in a uniform manner and makes it possible to obtain a very precise and homogeneous tube structure.

Abstract: An apparatus for seating a ring gasket 100 in a groove 41 in the end socket of a pipe or coupling includes a plurality of radially oriented prong hooks 7 spaced at regular intervals around a circle, and cooperable with an equal plurality of interposed, upstanding studs 24 extending between a circular lower disk 22 and a sectored upper disk 23 defining radial slots 27 to accomodate the prongs. The prongs are driven inwardly together on a support 1 capable of translational motion along an axis X-X perpendicular to the plane of the prongs, and reduce the diameter of a gripped gasket by deforming it into an undulating polygonal configuration. The gasket may then be inserted into the pipe end, whereafter the prongs are disengaged and the gasket expands elastically to seat in its pipe groove 41.

Abstract: A manhole for an urban sanitary system comprises a cover 2, a frame 1 for receiving the cover, a toric elastomeric sealing ring G1 interposed between the frame and the cover, and a soundproofing ring G2 on which the cover seats. The locking of the cover on the frame and the support of the cover on the rings G1and G2 are implemented by a plurality of flanges 4 recessed in the frame and bolted thereto.

Abstract: A seal assembly for axially connecting a male or spigot end 1 of a pipe T1 within a female or socket end 2 of a pipe T2 includes a radially compressed gasket G set between the outer surface of the spigot end and the inner surface of the socket, and a metal ring 3 which fits around the spigot end and bears against a lateral, inwardly facing surface 27 of an internal split metal mating flange 4, which in turn abuts internal surfaces 26, 24 on the inturned lip at the mouth of the socket. The gasket abuts the inner surface 20 of the metal ring.

Abstract: An apparatus for locking the male spigot end 2 of one pipe within the female bell housing 1 of another pipe includes a split ring 6 inserted under a radial flange 12 of the housing and a pair of clamps 16 having lugs 19 engaging mating notches 18 in the ends of the ring. The clamps are spread apart by a jack to expand the ring, whereafter they are circumferentially locked against the housing by driven wedging keys 20.

Abstract: The present invention relates to an installation for the step by step extraction from an ingot-mould of an elongated solid product (1) obtained by continuous bottom casting, shaping, calibration and solidification in a suitable chamber (2), the installation being characterized in that it is constituted:--by a first fixed device (3), a situated in the immediate vicinity of the outlet orifice of the chamber, constituted by a ring, surrounding the solid, having an inner face (4) in the shape of a frustum of a cone and having an opening comprised between 10.degree. and 20.degree.

Abstract: When pipes 8 are rollingly conveyed through a furnace along parallel rails 7, any lateral migrations of the pipes are periodically corrected by movable stops 18 which are extended inwardly in unison to abut the pipe ends and re-center them. The stops are mounted on elbowed arms 14 articulated about axes 15 disposed beneath the furnace bed together with fluid control cylinders 16 for the arms, thus providing unobstructed access around the side walls 2 of the furnace. The pipes roll over elevated slide runners 11 during their lateral re-centering by the stops, thereby avoiding the wear and abrasion of the rail crowns.

Abstract: A foundry mould for low pressure moulding of metal parts is constructed of a mould chamber (14) with a bottom surface (17) having an opening (31) through which molten casting metal can ascend. A peripheral pressure chamber (15) surrounds the side walls of the chamber (14) and a suction bell (18, 19) connected to a suction duct (23) covers the top of the mould chamber and pressure chamber. Communicating apertures (20, 21) provide gas flow paths from the mould chamber and pressure chamber to the suction bell. Patterns of gasifiable expanded polystyrene are located in the mould chamber and are supported therein by a masking device, such as a masking shell (28), by means of pattern appendages (26) connected to tubular supporting members (27) of the masking shell. A sleeve (34) is locked to the opening (31) and supports the masking device. Compacted, binderless, sand fills the remaining volume of the mould chamber.

Abstract: The vertically ascending casting of a thin-walled metal pipe and integral end fitting from a bath of molten metal is implemented using a housing 12 and a core 14 to mold the end fitting or bell housing and a tubular draw tube 6 to mold the pipe shank. The end fitting E is first formed by forcing the metal to rise in the annular space 16 between the housing and the core, simultaneously forming the initial section of the pipe shank. Once the end fitting has solidified it is extracted upwardly, step by step, while shank sections are simultaneously withdrawn from the metal bath. These sections are also solidified step by step along a tapering front S in the bath until the desired length of pipe T has been obtained.

Abstract: Two adjoining voussoirs 1, 2 in a tunnel shield are assembled by sandwiching a wedge 12 between their adjacent sides 7, 8. The wedge extends over the entire length and width of the voussoir sides, and has concave surfaces 12a of equal curvature radius to the convex surfaces of the voussoir sides. The angle .alpha. between the adjacent outer surfaces of the voussoirs may be adjusted by varying the radial disposition of the wedge before tightening the assembly. The full mating contact between the voussoir sides and the wedge evenly distributes the applied stress.