Torsion resistant coupling

Abstract

A coupling for joining first and second pipe elements in includes first and second rings attachable to pipe elements. Each ring defines a groove and a plurality of receiving surfaces adjacent to the groove. Segments are attachable end to end to surround a central space and the rings. Each segment includes keys projecting toward the central space for engagement with each groove of the rings. Each segment includes at least one action surface engageable with a receiving surface of the first and second ring. Engagement between the action surfaces and the receiving surfaces prevents rotation of the first and second pipe elements with respect to one another. A method of assembling the coupling is also disclosed.

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