Axially swaged fitting

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

Patent

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Details

F16L 19/065 (2006.01) F16L 13/14 (2006.01) F16L 19/07 (2006.01) F16L 33/22 (2006.01)

Patent

CA 2167844

A fitting (10) for attachment to a tube (12) by swaging comprises a cylindrical sleeve (16) having a tapered outer surface (30) and an inner surface (20) for receiving the tube (12). A cylindrical swaging ring (22) having a tapered inner surface (50) engages the tapered outer surface (30) of the sleeve (16) such that axial movement of the ring (22) in a forward direction with respect to sleeve (16) causes the ring (22) to apply a radial force to the sleeve (16) to swage it to the tube (12). The swaging ring (22) is locked onto the sleeve (16) both before and after swaging by one or more protrusions (66, 76) on the outer surface of the sleeve (16) which cooperatively engage an annular groove (78) in the swaging ring (22). The location of the protrusions (66, 76) and groove in relation to the tapered surfaces (50, 30) of the swaging ring (22) and sleeve (16) is especially configured to provide smooth axial loading during swaging and increase tube (12) retention capabilities at the conclusion of the swaging operation.

Un raccord (10) à fixer par sertissage à un tube (12) comprend un manchon cylindrique (16) ayant une surface externe effilée (30) et une surface interne (20) pour recevoir le tube (12). Un anneau de sertissage cylindrique (22) ayant une surface effilée interne (50) s'engage avec la surface effilée externe (30) du manchon (16) de sorte que le mouvement axial de l'anneau (22) dans une direction vers l'avant par rapport au manchon (16) fait que l'anneau (22) applique une force radiale au manchon (16) pour en provoquer le sertissage sur le tube (12). L'anneau de sertissage (22) est verrouillé au manchon (16) aussi bien avant qu'après sertissage par une ou plusieurs saillies (66, 76) sur la surface externe du manchon (16) qui s'engagent avec une rainure annulaire (78) de l'anneau de sertissage (22). L'emplacement des saillies (66, 76) et de la rainure par rapport aux surfaces effilées (50, 30) de l'anneau de sertissage (22) et du manchon (16) est choisi spécialement pour assurer une charge axiale régulière durant l'étampage et pour améliorer la solidité de la connexion entre le tube (12) et le raccord après l'opération de sertissage.

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