Swivel pipe coupling with restraint members

A swivel pipe coupling comprising:

• two semi-spherical couplings that comprise mating surfaces slanted at each other, said mating surfaces comprising walls that extend from outside surfaces of said semi-spherical couplings;
• wherein at least one of said semi-spherical couplings comprises a pipe connection for receiving therein a pipe, said pipe connection comprising an annular seal plus a grip ring, said grip ring comprising wedge-shaped grip elements that are radially spaced from one another about a ring member, said grip elements being formed with teeth that face inwards towards a center of said grip ring, and wherein one or more tightening elements pass through clamp members of each said pipe connection;
• wherein said mating surfaces are provided with an elastomeric seal, one or more clamps and one or more tightening elements that pass through said clamps;
• and wherein restraint members are located along said mating surfaces of said semi-spherical couplings, said restraint members being configured to resist forces which would tend to separate said semi-spherical couplings from each other.