Compression fitting with improved gripper ring

F - Mech Eng,Light,Heat,Weapons – 16 – L

Patent

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Details

F16L 19/03 (2006.01)

Patent

CA 2197854

Installation difficulties and/or reliability problems in compression fittings ofthe type having gripper rings are avoided in a construction that includes a fitting body (10) having a pipe or tube receiving opening (22), an externally threaded surface (20) about the opening (22) and a shoulder (26) located between the threaded surface (20) and the opening (22). An annual compression seal ring (36) of plastic sealing material abuts the shoulder (26) and a compression nut (30) is threaded on the threaded surface (20) and captures and compresses the seal ring (36) against the shoulder (26). A compression gripper ring (38) is located within the seal ring (36) and has overlapping, free ends (48), (50) withone of the ends (51) being of smaller dimension than the other of the ends (52) so as to fit within the end (52). The construction provides uniform contact and loading to improve reliability and eliminate a high stress contact point on the gripper ring (38) that can cause installation difficulties.

Le raccord à compression du type à bague de compression de la présente invention permet d'éliminer les difficultés d'installation et/ou les problèmes de fiabilité d'éléments de construction. Il comprend : un corps (10) muni d'une ouverture (22) pour recevoir un tuyau ou un tube; une surface externe filetée (20) entourant l'ouverture (22); et un épaulement (26) situé entre la surface filetée (20) et l'ouverture (22). Une bague d'étanchéité à compression (36) composée de matériel d'obturation en plastique est placée contre l'épaulement (26). Un écrou à compression (30) est vissé sur la surface filetée (20) afin de comprimer la bague d'étanchéité (36) et la maintenir en place contre l'épaulement (26). Une bague de compression (38) située dans la bague d'étanchéité (36) est munie d'extrémités libres superposées (48, 50). Une des extrémités (51) est de dimension inférieure à l'autre extrémité (52), de sorte qu'elle peut y être insérée. Ce type d'élément de construction assure un contact et une charge uniformes, ce qui permet d'améliorer la fiabilité et d'éliminer sur la bague de compression un point de contact à contrainte élevée (38), qui pourrait causer des difficultés d'installation.

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