US 12,434,856 B2
Bi-fold barrier system and method for a flight deck of an aircraft
Daniel Bryan Nunes, Snohomish, WA (US); Gregory Smith, Edmonds, WA (US); Steven Ellis Rhynard, Mukilteo, WA (US); Hakeem Haj-Musa, Bellevue, WA (US); Paul James Saum Addis, Bothell, WA (US); Sean M. Finerty, Bothell, WA (US); Daniel Paul Warren, Lake Stevens, WA (US); and Nathan Lee Near, Arlington, WA (US)
Assigned to The Boeing Company, Alexandria, VA (US)
Filed by THE BOEING COMPANY, Arlington, VA (US)
Filed on Jan. 5, 2024, as Appl. No. 18/405,260.
Prior Publication US 2025/0223053 A1, Jul. 10, 2025
Int. Cl. B64D 45/00 (2006.01)
CPC B64D 45/0026 (2019.08) [B64D 45/0028 (2019.08)] 20 Claims
OG exemplary drawing
 
1. An aircraft, comprising:
a flight deck including a flight deck door configured to be moved between an open position and a closed position;
a first monument;
a second monument; and
a secondary barrier door moveably secured between the first monument and the second monument, wherein the secondary barrier door is configured to fold into a stowed position in which a path to the flight deck is open, and unfold into a deployed position in which the path to the flight deck is closed,
wherein the secondary barrier door comprises:
a first panel;
a second panel; and
a pivot hinge pivotally coupling a first central portion of the first panel to a second central portion of the second panel, wherein the pivot hinge is between the first panel and the second panel, and wherein the pivot hinge comprises a lock; and
a lower bearing and an upper bearing configured to receive and retain an end of the second panel when the secondary barrier door is in the deployed position, wherein each of the lower bearing and the upper bearing comprises:
a base; and
opposed protuberances extending from the base, wherein the opposed protuberances include recessed lead-in walls that outwardly curve away from a central channel toward a front end thereby providing an expanded lead-in passage between the opposed protuberances.