Abstract: The present invention provides an apparatus for making a tube connection. The apparatus comprises a sleeve having an interior surface adapted for receiving a tube section therein. The sleeve further has an exterior surface having a locking mechanism disposed on an outer portion thereon, such outer portion has a first end and a second end. There is an upwardly inclined surface extending from such second end of such outer portion of the sleeve. Extending inwardly from the upwardly inclined surface is a generally cylindrical sleeve wall that is substantially parallel to a longitudinal axis extending through the sleeve from one end to another. There is further a stop flange disposed on a center portion of such sleeve extending radially outwardly from such center portion of such sleeve, such stop flange is disposed substantially adjacent such generally cylindrical sleeve wall.

Abstract: A pipe fitting 20 adapted for joining pipe 28, 30 comprises a swage ring 22, 24, 52 with a locking mechanism area 42, 63 which can lockingly engage with either a coupling body 26 and/or a pipe 28, 30, 56 which has a locking mechanism 44, 64 in order to prevent relative motion between the swage ring 22, 24 and the coupling body 26 and/or the swage ring 52 and the pipe 56. Such an arrangement prevents the swage ring 22, 24 from backing off of the fitting 20 should the fitting 20 be subject to flexing due to bending forces.

Abstract: A pipe coupling (100) including a coupling body (104) and a swage ring (102) for urging over the coupling body (104) in order to secure the pipes (122) together. The coupling body (104) includes a main sealing tooth (105) with an outboard isolation tooth arrangement (106). The isolation tooth arrangement (106) includes a plurality of isolation gripping teeth (108) which allows for a reducing gradient of pipe deformation in a direction toward the edge 118 of the coupling body (104) of the pipe fitting (100).

Abstract: A pipe coupling including a coupling body and swage rings for urging over the coupling body in order to secure the pipes together. The coupling body includes a main sealing tooth with an outboard isolation tooth and an inboard tooth located on opposite sides of the main sealing tooth. First and second grooves are defined between the main sealing tooth and the outboard isolation tooth and the inboard tooth, which grooves are of sufficient length and depth so that pipe secured by the coupling is not substantially deformed adjacent the first and second grooves in order to enhance the ability of the main sealing tooth to bite into the pipe in order to provide a hermetic seal and also to increase the resistance of the coupling to tensile loads. The outboard isolation tooth and inboard tooth protect the seal created by the main sealing tooth from external forces caused by bending. The main sealing tooth can include a twin tooth having a parent tooth and one or more sealing teeth extending therefrom.