Abstract: A pipe coupling for encircling and coupling aligned pipe ends is formed of aligned arcuate segments that are fastened together. The segments are hingedly connected together at adjacent ends by means of a hook formed on the end of one segment and a hook receiving loop formed on the corresponding end of the other segment. The loop forms an elongated rectangular opening defined by a pair of radially outwardly extending legs, that are joined to the segment and an axle connecting the legs. The hook has a similar cross section, but is loosely fitted within the opening. A depression is formed in the axle, at one leg, and a correspondingly aligned depression is formed in the segment wall adjacent the opposite leg. The hook has a projection which normally prevents the hook from withdrawal from the loop opening when the hook is pivoted relative to the opening.

Abstract: A coupling for either rigidly or flexibly connecting the adjacent ends of a pair of aligned pipes, is formed of a circular casing made of a pair of aligned, semi-circular segments which surround a resilient pipe gasket. The opposite ends of the segments have radially outwardly extending lugs which form pairs of overlapping fastening lugs. The lugs of at least one pair each have transversely aligned bolt holes and opposed sockets that are generally concentric with the bolt holes and open towards each other. A bolt extending through the sockets and bolt holes fasten the lugs together and cause the segments to clamp radially inwardly towards the pipes for coupling the pipes together with some permissible flexibility of relative movement. A plug having opposite end portions and a central bolt hole is removably fitted within the opposed lug sockets, with the bolt extending through its central bolt hole.