Patent ID: 8789832

Claim:
An annular gasket configured to seal a split-ring gland of a pipe coupling onto an end of a pipe, the annular gasket comprising: an annular outer gasket including an outer circumferential surface configured to engage said split-ring gland and an inner circumferential surface including multiple interdigitations and defining an opening of a first diameter; and a separate annular inner gasket including an outer circumferential surface including multiple interdigitations and removably engaged with the inner circumferential surface of the outer gasket such that the outer and inner gaskets are held together merely by the multiple interdigitations on the outer gasket and the multiple interdigitations on the inner gasket, and an inner circumferential surface defining an opening of a second, smaller diameter, the inner circumferential surface of the outer gasket and the outer circumferential surface of the inner gasket being configured to selectively engage so as to reusably couple the inner and outer gaskets whereby to accommodate pipe ends of different diameters, the inner gasket having a first axial width longer than a second axial width of the outer gasket, wherein a lip on the inner gasket is defined by a portion of the first axial width that projects beyond the second axial width of the outer gasket, and the multiple interdigitations on each of the outer gasket and the inner gasket include at least one first interdigitation and at least one second interdigitation having a size larger than the at least one first interdigitation.