Patent ID: 6016842
Filing Date: 2000-01-25
Classification: F16L

Abstract:
A method of attaching a metal end fitting to a flexible metal hose comprising:a. sliding a ferrule with a throughbore onto a metal tube;b. cold-working the tube to produce an annular stop bead, along the tube's mid-length, that retains the ferrule between the bead and a flared end of the tube;c. inserting a straight end portion of the tube into a first end of a convoluted metal innercore of the flexible metal hose until the stop bead abuts the innercore;d. flattening a first convolution of the metal innercore to produce a crown, prior to inserting the tube into the innercore;e. connecting the metal stop bead to the metal innercore by a weld between the crown of the flattened first convolution and a tip of the stop bead, wherein the weld is located, at least in part, atop the crown;f. sliding the ferrule over the stop bead until it is mounted on the first end of the innercore, where it straddles both the bead and weld; andg. radially crimping the ferrule to hold the ferrule in place and protect the weld.