Resilient element for a bi-directional pig

摘要

For use in an assembled pipeline cleaning pig which is enabled to move in both directions, an element formed of resilient material which is preferably symmetrical about a transverse plane through the element wherein the element has an outer periphery which contacts against the wall of the pipe to be cleaned with a profile which includes an arc of curvature to thereby enable flexure of the resilient element to the right or left without altering the nature of contact against the pipe to be cleaned and without binding or otherwise snagging.