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

Abstract: A swaging tool for swaging an axially swaged fitting for connecting tubes and pipes is disclosed. The tool comprises a housing and a piston movable in opposite axial directions within the housing. A first engaging member in the form of a U-shaped yoke is formed on the outer surface of the housing. A second engaging member, also in the form of a U-shaped yoke, is formed on the outer surface of the piston and is adapted to slide within slots in the outer surface of the housing. Both of these yokes are configured to allow each yoke to engage a portion of the fitting to swage it when the yoke of the second engaging member is moved toward the yoke of the first engaging member.

Abstract: A fitting for attachment to a tube by swaging is disclosed. The fitting comprises a cylindrical sleeve having a tapered outer surface and an inner surface for receiving the tube. A cylindrical swaging ring having a tapered inner surface engages the tapered outer surface of the sleeve such that axial movement of the ring in a forward direction with respect to the sleeve causes the ring to apply a radial force to the sleeve to swage it to the tube. The swaging ring is comprised of a lightweight, high strength material, such as a composite material, having high tensile strength in a circumferential direction and a high modulus of elasticity, with relatively low density and low elongation properties. One preferred composite material comprises an epoxy resin matrix and a high strength graphite fiber. The swaging ring is locked onto the sleeve both before and after swaging by one or more protrusions on the outer surface of the sleeve which cooperatively engage an annular groove in the swaging ring.