| 摘要 |
A door assembly for providing access to an enclosed space such as an airplane hangar. The door assembly includes a door panel configured to open and close an opening is provided. The door assembly includes an actuator configured to drive a rod upwardly. A first pin is fixedly mounted to the rod and rotatably mounted to the door. A link limits the upward advancement of a top portion of the door. The door is carried upward by the first pin, and rotated about the first pin as the link limits the upward advancement of the top portion of the doors. |
