RIB CONSTRUCTION FOR LARGE DIAMETER PIPE FITTINGS

A rotationally molded large-diameter pipe fitting, the wall structure of which is characterized as having a generally smooth interior surface and an exterior surface that is defined by a plurality of axially-spaced circumferentially extending ribs which are monolithically formed and homogeneous with...

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Bibliographische Detailangaben
Hauptverfasser:	LARKINS, JOSEPH, DOUGLASS, CARL, III
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING BLASTING ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS HEATING INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS JOINTS OR FITTINGS FOR PIPES LIGHTING MEANS FOR THERMAL INSULATION IN GENERAL MECHANICAL ENGINEERING PERFORMING OPERATIONS PIPES SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING TECHNICAL SUBJECTS COVERED BY FORMER USPC TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ARTCOLLECTIONS [XRACs] AND DIGESTS THERMAL INSULATION IN GENERAL TRANSPORTING WEAPONS WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	A rotationally molded large-diameter pipe fitting, the wall structure of which is characterized as having a generally smooth interior surface and an exterior surface that is defined by a plurality of axially-spaced circumferentially extending ribs which are monolithically formed and homogeneous with the smooth interior surface of the fitting. The fitting is seamless and modularly designed with integral coupling elements at each terminal end, and with a ribbed wall structure profile capable of withstanding the loads typically found in buried applications with watertight performance requirements, where such ribbed wall structure meets the following dimensions and dimensional ratios: Rib Sidewall Angle (95 - 105 degrees); Bottom / Top Rib Thickness Ratio (1.80 - 2.80); Pitch / Rib Height Ratio (1.50 - 1.95); Rib Height/Fitting Diameter Ratio (0.04- 0..09); and Avg. Rib Thickness / Rib Height Ratio (0.28 - 0.40). La présente invention concerne un accessoire de tuyauterie à grand diamètre moulé par rotation dont la structure de paroi présente une surface intérieure généralement lisse et une surface extérieure qui est définie par une pluralité de nervures qui s'étendent de manière circonférentielle à distance axiale et sont formées de manière monolithique et sont homogènes avec la surface intérieure lisse de l'accessoire. L'accessoire est sans soudure et conçu de manière modulaire avec des éléments de raccordement d'un seul tenant à chaque extrémité et avec un profil de structure de paroi nervuré capable de résister aux charges généralement présentes dans les applications souterraines présentant des exigences de performances étanches à l'eau. Cette structure de paroi nervurée respecte les dimensions et les rapports de dimension suivants : angle de paroi latérale de nervure (95 à 105 degrés) ; rapport épaisseur de nervure bas/haut (1,80 à 2,80); rapport pas/hauteur de nervure (1,50 à 1,95) ; rapport hauteur de nervure/diamètre accessoire (0,04 à 0,09) ; et rapport épaisseur de nervure moyenne/hauteur de nervure (0,28 à 0,40).