Abstract: A passenger loading bridge includes a ground level rotunda, a tunnel support vertically pivoted thereto, an elevated tunnel horizontally pivoted to the support, a drive assembly horizontally pivoted to the tunnel outer end and rigidly mounting a detachable aircraft engaging cab. Stairs are located in the tunnel support. The drive assembly swings and elevates the tunnel, while a parallelogram linkage assures that the cab is level at all elevations. The cab is offset 45.degree. to the tunnel axis and has extension and rotation capabilities. The tunnel features a load bearing floor support and walls and a roof of curtain wall construction.

Abstract: A closure for the cab of an aircraft passenger loading bridge comprises a bellows-type curtain frame which includes an outer inverted U-shaped frame having it legs pivoted to the platform for lateral movement and having a pair of power actuator assemblies which are articulated to permit lateral movement of the outer end of the frame to conform to any aircraft contour.