Patent ID: 6595559
Filing Date: 2003-07-22
Classification: F16L

Abstract:
A coupling comprising a tubular inner member defining a socket for receiving an a tubular deformable element to which the coupling is to be connected, an outer member which extends around and defines an annular chamber with the inner tubular member, and an inlet communicating with the chamber to enable pressurisation of the chamber by introducing fluid to the chamber through the inlet, the inner member being radially compressible by pressurisation of the chamber to grip an the tubular deformable element within the socket, wherein the coupling comprises a tubular insert which in use is inserted into the end of the tubular deformable element to which the coupling is to be connected, the tubular insert being arranged to limit the radially inwards deformation of the tubular deformable element and being provided with surface formations to grip the tubular deformable element after radially inward deformation of the tubular deformable element.