A gasket for preventing separation of interconnected pipes including a compressible body having a plurality of metal segments partially embedded therein. Each of the metal segments includes an inner surface having at least one tooth configured for engaging a spigot end of a pipe and an outer surface having an arm with a substantially flat portion arranged adjacent to a forward section of a retainer groove of the gasket, the substantially flat portion being configured for displacing the segment radially and axially upon insertion of the spigot end into a bell end of the other pipe thereby decreasing the spigot insertion force required to seat the spigot end within the bell end and the gasket.
F16L 17/02 - Raccords avec garnitures adaptées à une étanchéité par pression de fluide avec segments d'étanchéité disposés entre la surface extérieure du tuyau et la surface intérieure d'un manchon ou d'une douille
F16L 21/02 - Raccords avec manchon ou douille avec segments d'étanchéité élastiques entre le tuyau et le manchon ou entre le tuyau et la douille, p. ex. avec des segments roulants ou autres segments profilés préfabriqués
A gasket for preventing separation of interconnected pipes without damaging the pipes. The gasket includes a compressible body having a plurality of metal segments partially embedded therein. Each of the metal segments includes a row of exposed teeth configured for engaging a spigot end of a pipe and a trough configured for pivotably engaging a bead on a bell. The trough is further configured for shearing or deforming the bead and inhibiting over-pivoting of the segment about the bead when the pipes are partially withdrawn away from one another, for example, during over-pressurization of the pipes.
B23P 11/02 - Assemblage ou désassemblage de pièces ou d'objets métalliques par des processus du travail du métal non prévus ailleurs en dilatant une pièce et en l'emmanchant ensuite sur une autre pièce par retrait, ou en rétractant une pièce et en l'emmanchant ensuite par dilatation, p. ex. en employant la pression de fluidesAssemblage ou désassemblage de pièces ou d'objets métalliques par des processus du travail du métal non prévus ailleurs par assemblage à force
A metal utility pole including a hollow, centrifugally cast, ductile iron utility pole member having a tapered exterior and variable wall thickness for providing a shortened press-fit, slip joint between interconnected pole members. The shortened joint length requires less metal than conventional press-fit, slip joints while maintaining or improving the overall strength of the joint. This is accomplished by increasing the wall thickness of one or both interconnected pole members along the joint relative to the wall thickness of the body or mid-section of the pole members.
A utility pole mold including an elongated, hollow mold body having an internally tapered end and a reservoir extending radially out therefrom. A reusable barrier member is detachably secured to the at least one wall opposite the tapered end for containing a molten metal within the reservoir. In use, a lance is inserted into the mold body and a pouring end of the lance is positioned about the reservoir. The mold body and reservoir are then rotated, and the molten metal is poured from the pouring end at a constant rate. As the lance travels along the length of the mold body at an accelerating rate, a continuous layer of the molten material is deposited within the mold body and the reservoir. Following casting, the barrier is removed from the reservoir, and the newly formed utility pole is removed from mold. That portion of the pole that was formed within the reservoir portion is then removed to provide a pole having a bottom end with a desired wall thickness and interior taper.
B22D 13/02 - Coulée par centrifugationCoulée utilisant la force centrifuge de pièces longues, pleines ou creuses, p. ex. de tuyaux, coulées dans des moules tournant autour de leur axe longitudinal
B22D 13/10 - Accessoires pour machines à couler par centrifugation, p. ex. moules, leur garnissageMoyens pour l'alimentation en métal liquide, pour le nettoyage des moules ou pour l'extraction des pièces
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