Patent ID: 8104129

Claim:
An open and close apparatus for a shelter of a boarding bridge, the shelter being fixed above a floor of the boarding bridge and having two open ends, one of which is provided with a flexible frame being able to protrude and stick on an aircraft shell and the other of which is connected to a portal frame of the boarding bridge, the open and close apparatus being provided between the flexible frame and the portal frame, wherein the open and close apparatus for the shelter of the boarding bridge includes at least one extension arm means provided on the portal frame, and each extension arm means comprises: an upper arm having one end pivotally coupled with a column of the portal frame; a lower arm having one end pivotally coupled with the other end of the upper arm and the other end pivotally coupled with an upper end of the flexible frame; a propeller controlled by a control system and including an extension rod and a main body for accommodating the extension rod, wherein one end of the extension rod is pivotally coupled with the lower arm, and one end of the main body is pivotally coupled with the upper arm; and overpressure protection means for buffering an acting force between the shelter and the aircraft shell, and connecting to the control system such that the control system controls the propeller to stop protruding and/or contracting the extension rod when the acting force exceeds a predetermined value.