the pivot axis of the wing being situated near one edge of the wing, especially at the top and bottom, e.g. trunnions

Full Title

Hinges or pivots of special construction (used for special suspension arrangements E05D15/00; so as to be self-closing E05F1/06, E05F1/12; with means for raising wings before being turned E05F7/02) > for use in suspensions comprising two spigots placed at opposite edges of the wing, especially at the top and the bottom, e.g. trunnions > the pivot axis of the wing being situated near one edge of the wing, especially at the top and bottom, e.g. trunnions