US 12,275,521 B2
Double-curved aircraft door with optimised locking means
Sébastien Devillez, Saint Jean (FR); and Jean Francois Ducasse, Miradoux (FR)
Assigned to LATECOERE, Toulouse (FR)
Appl. No. 18/006,609
Filed by LATECOERE, Toulouse (FR)
PCT Filed Jul. 28, 2021, PCT No. PCT/EP2021/071110
§ 371(c)(1), (2) Date Jan. 24, 2023,
PCT Pub. No. WO2022/023402, PCT Pub. Date Feb. 3, 2022.
Claims priority of application No. 2008210 (FR), filed on Jul. 31, 2020.
Prior Publication US 2023/0264803 A1, Aug. 24, 2023
Int. Cl. B64C 1/14 (2006.01)
CPC B64C 1/1423 (2013.01) 16 Claims
OG exemplary drawing
 
1. A double-curved aircraft door intended for an aircraft that extends along a longitudinal axis (21), the aircraft door having at least one locked configuration and one open configuration, the aircraft door comprising:
a leaf (19) and a frame (20), the leaf (19) being articulated relative to the frame (20);
a locking device including leaf stops (22) and frame stops (23), each leaf stop (22) being positioned against a corresponding frame stop (23) when the aircraft door is in a locked configuration, each leaf stop (22) and the corresponding frame stop (23) forming a pair of complementary stops that include bearing surfaces (26, 27) that are in contact in an area of contact (30) when the aircraft door is in the locked configuration, said pairs of complementary stops being arranged on a first lateral edge (24) and on a second lateral edge (25) of the aircraft door, the corresponding areas of contact (30) being arranged in at least two sets: a first set of contact areas of the first lateral edge and a second set of contact areas of the second lateral edge;
the isobarycenter (31A) of each contact area (30) of the first lateral edge (24) is disposed in a first plane (32) perpendicular to said longitudinal axis (21);
the isobarycenter (31B) of each contact area (30) of the second lateral edge (25) is disposed in a second plane (33) perpendicular to said longitudinal axis (21);
for each contact area (30) the normal (34) to the contact area (30) passing through its isobarycenter (31A, 31B) passes substantially through the axis (41) of the mean cylinder (42), the mean cylinder (42) being defined as the circular base cylinder the axis (41) of which is parallel to said longitudinal axis (21) and the radius (R) of which satisfies the following condition: the sum of the distances (D1,D2,D3,D4,D5,D6) between the isobarycenter (31A) of each contact area (30) of the first lateral edge (24) and the mean cylinder (42) is substantially equal to the sum of the distances (d1,d2,d3,d4,d5,d6) between the isobarycenter (31B) of each contact area (30) of the second lateral edge (25) and the mean cylinder (42);
for each contact area (30) the normal (34) to the contact area (30) passing through its isobarycenter (31A, 31B) forms a deviation angle (37) with a plane (32, 33) perpendicular to said longitudinal axis (21), the deviation angles (37) of all the contact areas (30) being equal.