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 sealing gasket for an unlocked roadway manhole accessing a municipal sewage system is interposed between a cover 2 and a frame 1, and has an inverted L or hook-shaped cross-section including two spaced and parallel outwardly extending upper lips 18, 19 and two lower, oppositely extending lips 17, 20.

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 mounting assembly for a take-off branch of a primary pipe 1 includes a rectangular based, tubular connection member 3 extending outwardly from the pipe through a rectangular aperture 2 in the pipe wall and having clamping tongues 3c, 3d engaging under the aperture edges on opposite sides thereof, an external gasket 4 fitted over the connection member and seating against its base and the outer surface of the pipe, and a rigid saddle 5 overlying the gasket. Four extendible tightener bolts 7, 8 are installed between the corners of the saddle and abutment supports recessed into the connection member base, and are unthreaded during installation to compress the gasket and establish a uniform seal.

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: Installation comprising a reservoir crucible 11, 12 for molten cast-iron F with step-by-step extraction of a pipe T produced from the crucible comprising a cooled die. To obtain a cast-iron pipe of uniform thickness over its entire circular periphery, despite the absence of a core, the molten cast-iron F is set in slow rotation in the crucible by the tangential supply of molten cast-iron with a low rate of flow through a tangential orifice 18, by the rotation of a magnet 36 disposed in a hollow central relief 17 upstanding from the base of the crucible, by the rotation of paddle arms 44 disposed in the molten iron, or by the tangential injection of an inert gas.

Abstract: A sealed joint for connecting cast iron hot water pipes includes a gasket G disposed between a spigot 5 and a socket 6 of two pipes 4, a spacer 1 between the socket end and an outer jacket 8 surrounding a layer of insulation 7, a sealing ring 2, and a clamp 3 to fasten a skirt of the ring around the outer surface of the jacket.

Abstract: A gasket for a rotary gate valve is made from a material that can be utilized only after sintering, such as a fluorocarbon polymer, and comprises a ring-shaped solid portion 15 surrounded by a coaxial, annular flange 16 for anchoring the gasket within the valve body. A closed chamber 23 is provided in the solid portion of the gasket and houses an elastic ring 28. In manufacturing the gasket an annular ring is formed comprising the solid portion 15, an axial groove 23, an axial tab 29, and a radial tab 30. The elastic ring 28 is then inserted in the axial groove, and the tabs 29 and 30 are pressed together to form the annular flange 16 and fully enclose the ring 28.

Abstract: In a continuous vertical ascending casting installation for iron pipes T, graphite elements 3 defining a molten metal feed chimney 28, a die and coaxial core arrangement 13, 14 and an expansion vessel 16 are mounted under a cover 2 of an electric furnace 1. In use these graphite elements are immersed in a bath of molten metal contained in the hearth area 7 of the furnace, to thus enable precise temperature regulation and control. The outer surface of the die 13 is surrounded by a water cooling jacket 18, and the level of molten iron in the hollow cavity 25 of the core 14 is varied by the expansion vessel 16, to provide even finer control of the temperature gradient within the annular casting space. The overall arrangement is thus similar to a double boiler.

Abstract: In the centrifugal casting of iron pipes, molten metal from a tilt ladle 13 is supplied to an inclined pour trough or channel 14 whose outlet nose 16 is relatively axially movable within a rotating mold 3. To compensate for the reduction in the hydrostatic thrust of the molten metal in the pour channel when the metal supply is terminated near the end of the casting operation, the inclination of the channel 14 is gradually increased to thereby maintain a constant flow rate at the nose 16. Further, to compensate for the reduction of the height of fall due to the tilting of the pour channel and the attendant lowering of the downwardly sloping nose, the point of articulation 22 of the channel 14 within the mold is also raised in synchronism with the increased tilting of the channel.

Abstract: In the continuous ascending vertical casting of an iron tube T without the use of a core to form the hollow tube interior, the molten iron is contained in a crucible made up of a cooled tubular die 6, 7 and the base 1 of a syphon unit. The crucible comprises a coaxial central form 5 at least as high as the die, which creates with the latter an annular space for molten iron F. Such arrangement reduces the volume of molten iron in the crucible and thus results in considerable energy savings.

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.