Patent ID: 8322755

Claim:
A tube coupling, including a tubular housing; a seal within the housing for sealing against the outside of a tube which is inserted into the coupling; a substantially annular and resilient grab ring located within the housing for gripping the outside of the tube which is inserted into the coupling to retain the tube against release from the coupling; the grab ring being mounted within housing between a first pair of radially inwardly extending abutments which are spaced apart axially in the direction of insertion of the tube into the coupling; a demount member for releasing the grab ring from a condition of gripping the outside of the tube which is inserted into the coupling, the demount member being at least partially within the housing the demount member including a grab ring engaging section and a drive section, the drive section being drivable to shift the engaging section into engagement with the grab ring; and one or more cams being provided projecting from an outside surface of the housing for engagement by a tool, cooperation between the tool and the one or more cams being such that rotation of the tool relative to the coupling causes the tool to shift axially to drive the drive section of the demount member to shift the engaging section into engagement with the grab ring.