Patent ID: 7246412

Claim:
A hanger hinge for a folding door, window or similar closure having one or more panels, the hanger hinge comprising: a hanger bolt having an externally threaded lower end; a nut member adapted to be threaded onto the threaded end of the hanger bolt, the nut member being a tubular nut having a socket on its underside adapted to receive therein a nut adjusting tool; a sleeve member having a bore dimensioned to receive the nut member at least partially therein, the sleeve member being supported by the nut member in use and operatively engaging the hanger bolt to prevent relative rotation between the sleeve member and the hanger bolt; at least one hinge leaf pivotally mounted on the hanger bolt and adapted to be fixed to a respective panel, the operative position of the hinge leaf being dependent on the extent to which the nut member is threaded onto the hanger bolt; and a locking mechanism comprising a radially displaceable mechanical key which releasably locks the nut member rotationally relative to the sleeve member, the locking mechanism being automatically disengaged by axial insertion of the nut adjusting tool to displace the key radially and thereby free the nut member to be rotated relative to the hanger bolt.