| 摘要 |
A door assembly of the up-and-over type includes a generally planar door (10) and one or more guides (12). A pair of pivot arms (14) each pivotally links one side edge of the door, at a point (15) in the lower half of the door, to a first point (16) on the door frame spaced from the top of the frame and a pair of gas springs (17) each pivotally links a point (19); on the pivot arm to a second point (18) on the door frame below the first point. The pivot arms and gas springs swing outwardly of the doorway as the door moves between its limiting positions. |
