Patent ID: 6481764
Filing Date: 2002-11-19
Classification: B21D,F16L,Y10T

Abstract:
A method of connecting two malleable pipes comprising locating an end portion of one pipe inside the end portion of the other pipe with an O-ring located between the end portions, and using a crimping tool to apply inwardly directed crimping forces in a radially inward direction around the O-ring and in a manner to cause radially inward deformation of both pipe portions immediately adjacent each side of the O-ring whereby the O-rig is deformed and partially flattened to establish a fluid tight seal between the pipes, wherein the O-ring is one of two axially spaced O-ring and application of the crimping tool comprises a first crimping operation across a first of the O-rings so as to form a crimp between the pipes on both sides of the first O-ring, and a second crimping operation across a second of the O-rings so as to form a crimp between the pipes on both sides of the second O-ring.