Patent ID: 7909369

Claim:
A coupling for joining two pipes having end sections, each of which is provided with a circumferential locking rib and can be inserted into the coupling, wherein the coupling has: at least one single unitary piece elastic ring that joins at least two elongated webs, and wherein each single unitary piece elastic ring has a single break, and wherein the webs have radially inward projecting stop projections located at respective longitudinal ends of the webs, and wherein the stop projections lock into place behind the locking ribs of the pipe end sections when the end sections are inserted into the coupling to lock the two pipes together in joined connection, and wherein the coupling can be unlocked to release the connection of the pipes by expanding the at least one single unitary piece elastic ring, and wherein each single unitary piece elastic ring is made of spring steel, and wherein the webs are made of plastic, and wherein the at least one ring is extrusion-coated by the material of the webs thereby holding and embedding each single unitary piece elastic ring in the plastic of the webs except for the break of each single unitary piece elastic ring and an uncoated joint portion of each single unitary piece elastic ring.