Patent ID: 7712639

Claim:
A plastic outlet valve for plastic transport and storage containers for liquids, the outlet valve comprising: a valve housing having an inlet socket and a union nut captively secured on the inlet socket, wherein the inlet socket is configured to be screwed with the union nut onto an outlet socket, provided with an outer thread, of a liquid container; the valve housing further having an outlet socket; an anti-twist device comprising an outer annular cam arrangement that is arranged on the inlet socket of the valve housing; wherein the outer annular cam arrangement has locking cams; wherein the locking cams, when tightening the inlet socket of the valve housing in the outlet socket of the liquid container by screwing the union nut onto the outlet socket of the liquid container, are configured to interlock with the locking cams of an inner annular cam arrangement formed on the outer end of the outlet socket of the container.