Patent ID: 6058755
Filing Date: 2000-05-09
Classification: B21D,B25B

Abstract:
A press tool for non-detachably connecting through cold deformation a fitting and an end portion of a metal pipe received in a socket of the fitting, said press tool comprising:a wraparound ring for placement over the socket of the fitting, said wraparound ring including a plurality of hinged links and being open at one closing area between two terminal links, said terminal links being formed with pockets to form grip points; anda machine-driven clamping device having grip ends for engagement in the pockets of the terminal links, said clamping device having a pair of jaws rotatable about pivots which extend parallel to one another in symmetry to a longitudinal center plane, said grip ends being formed in one piece with the jaws and formed as arched lobes pointing toward the center plane for engagement in the pockets, said pockets having an arched inner contour and smooth side surfaces, said terminal links adjacent the closing area each being configured with a terminal bulb profile to bound the arched inner contour of the pockets, with the lobes of the jaws hooking behind the bulb profile of the terminal links during crimping operation,wherein the socket of the fitting is formed with an inwardly facing groove for receiving at least one holding element which is so configured as to penetrate into the material of the end portion of the metal pipe during radial cold deformation.