Abstract: A pipe coupling for coupling the ends of pipes which may or may not have spigots at the ends and in which there may be variations in the diameters of the pipe ends and/or the spigots. A circular gasket spans the ends of the pipes being coupled. A clamping device clamps around the gasket and against the pipe ends. The gasket has a smooth, uninterrupted, intermediate exterior portion. A space or cavity is provided between this portion of the gasket and the inside of the clamping device. One or more external ribs are provided on the outside of the gasket between the intermediate portion and each end. These ribs are enlarged or enhanced in height or depth to provide the cavity between the intermediate part of the gasket and the inside of the clamping device. A spigot on the end of one pipe or both will force the intermediate part of the gasket into the cavity which provides space to accommodate the presence of spigots and variations in diameter.

Abstract: The invention is a pipe coupling particularly adapted for coupling together the ends of pipes that may or may not have annular end ribs, i.e. spigot beads. The coupling embodies a gasket into which the ends of the pipes are fitted. Deformable (semi-rigid) clamping members clamp around the gasket and the ends of the pipe. These members have shallow internal annular recesses. The gasket has diametrically opposed extending ears which are clamped between mating end parts forming lugs on the clamping members. The gasket has an integral external annular rib which fits into the annular recesses in the clamping members; pipes with spigot beads are accommodated in the annular recesses of the clamping members. The clamping members when clamped (torqued) deform to apply clamping pressure to the gasket throughout the entire circumference.