OWEED divan with fold-down backrest for egress and inflatable restraint for occupant protection
A divan for installation in an aircraft cabin in relation to an emergency exit. In embodiments, the divan includes at least two seats wherein one seat is positioned directly in front of the emergency exit and includes a lower frame assembly and an upper frame assembly. The upper frame assembly includes a seat pan subassembly configured to raise and lower relative to the lower frame assembly, and a backrest subassembly rotatably attached to the seat pan subassembly. In use, the backrest rotates to a position overlaying the seat pan subassembly and the seat pan subassembly lowers toward the floor to achieve a step-up height of not more than 20 inches to comply with the step-up height requirements for a Type-III emergency exit.
1 . A divan including two or more laterally adjacent seats, at least one of the seats comprising:
a lower frame assembly attachable to a floor;
an upper frame assembly comprising:
a seat pan subassembly movably attached to the lower frame assembly; and
a backrest subassembly rotatably attached to the seat pan subassembly;
a lock assembly configured to lock at least one of rotational motion of the backrest subassembly relative to the seat pan subassembly, and motion of the seat pan subassembly relative to the lower frame assembly; and
a passenger restraint assembly comprising:
a first webbing portion routed through the backrest subassembly;
an airbag associated with the first webbing portion;
a second webbing portion, continuous with the first webbing portion, routed through the seat pan subassembly;
a retractor upon which the second webbing portion is wound;
at least one first roller rotatably mounted to the backrest subassembly and configured to interact with the first webbing portion; and
at least one second roller rotatably mounted to the seat pan subassembly and configured to interact with the second webbing portion;
wherein, in use:
the backrest subassembly is configured to rotate between a first position in which the backrest subassembly is upright and a second position in which the backrest assembly overlays the seat pan subassembly; and
the seat pan subassembly is configured to raise and lower relative to the lower frame assembly.
2 . The divan according to claim 1 , wherein a height of the backrest subassembly, when the backrest subassembly is in the second position and the seat pan subassembly is fully lowered relative to the lower frame assembly, is not more than 20 inches, as measured from a floor to which the lower frame assembly is attached to a top of the backrest subassembly when in the second position.
3 . The divan according to claim 1 , wherein the lower frame assembly comprises a step positioned behind the seat pan subassembly, and wherein the step and the backrest subassembly, when the backrest subassembly is in the second position, are substantially horizontally aligned.
4 . The divan according to claim 1 , wherein the seat pan subassembly and the lower frame assembly interface via a guide assembly configured to guide vertical motion of the seat pan subassembly relative to the lower frame assembly, the guide assembly comprising at least one guide carried on one of the seat pan subassembly and the lower frame assembly, and at least one slot formed on the other of the seat pan subassembly and the lower frame assembly, the at least one guide configured to travel along the at least one slot.
5 . The divan according to claim 1 , further comprising at least one first damper having a first end mounted to the backrest subassembly and a second end mounted to the seat pan subassembly, the at least one first damper, when fully extended, configured to prevent further rotation of the backrest subassembly toward the seat pan subassembly.
6 . The divan according to claim 1 , further comprising at least one second damper having a first end mounted to the seat pan subassembly and a second end mounted to the lower frame assembly, the at least one second damper configured to control vertical motion of the seat pan subassembly relative to the lower frame assembly.
7 . The divan according to claim 1 , wherein the lock assembly comprises:
a backrest lock subassembly comprising at least one lock mounted to one of the seat pan subassembly and the backrest subassembly, and at least one pin mounted to the other of the seat pan subassembly and the backrest subassembly, each lock configured to capture and release its respective pin;
a seat pan lock subassembly comprising at least one lock mounted to one of the seat pan subassembly and the lower frame assembly, and at least one pin mounted to the other of the seat pan subassembly and the lower frame assembly, each lock configured to capture and release its respective pin;
a first actuator positioned on and accessible from an inboard side of the divan;
a second actuator positioned on an accessible from an outboard side of the divan; and
cabling interconnecting each of the first and second actuators to each of the locks of each of the backrest lock subassembly and the seat pan lock subassembly.
8 . A passenger seating configuration for an aircraft including an emergency exit positioned in an exterior wall and over a wing of the aircraft, the passenger seating configuration comprising:
a divan positioned against the exterior wall and facing inboard, the divan including two or more laterally adjacent seats, at least one of the seats positioned directly in front of the emergency exit and comprising:
a lower frame assembly attachable to a floor;
an upper frame assembly comprising:
a seat pan subassembly movably attached to the lower frame assembly; and
a backrest subassembly rotatably attached to the seat pan subassembly; and
a lock assembly configured to lock at least one of rotational motion of the backrest subassembly relative to the seat pan subassembly, and motion of the seat pan subassembly relative to the lower frame assembly;
wherein, in use:
the backrest subassembly is configured to rotate between a first position in which the backrest subassembly is upright and a second position in which the backrest assembly overlays the seat pan subassembly; and
the seat pan subassembly is configured to raise and lower relative to the lower frame assembly.
9 . The passenger seating configuration according to claim 8 , wherein:
the emergency exit is a Type-III exit pursuant to Federal Aviation Regulation (FAR) Sec. 25.801; and
a height of the backrest subassembly, when the backrest subassembly is in the second position and the seat pan subassembly is fully lowered relative to the lower frame assembly, is not more than 20 inches, as measured from a floor to which the lower frame assembly is attached to a top of the backrest subassembly when in the second position.
10 . The passenger seating configuration according to claim 8 , wherein the lower frame assembly comprises a step positioned behind the seat pan subassembly, and wherein the step and the backrest subassembly, when the backrest subassembly is in the second position, are substantially horizontally aligned.
11 . The passenger seating configuration according to claim 8 , wherein the divan further comprises a passenger restraint assembly comprising:
a first webbing portion routed through the backrest subassembly;
an airbag associated with the first webbing portion;
a second webbing portion, continuous with the first webbing portion, routed through the seat pan subassembly; and
a retractor upon which the second webbing portion is wound.
12 . The passenger seating configuration according to claim 11 , wherein the passenger restraint assembly further comprises:
at least one first roller rotatably mounted to the backrest subassembly and configured to interact with the first webbing portion; and
at least one second roller rotatably mounted to the seat pan subassembly and configured to interact with the second webbing portion.
13 . The passenger seating configuration according to claim 8 , wherein the seat pan subassembly and the lower frame assembly interface via a guide assembly configured to guide vertical motion of the seat pan subassembly relative to the lower frame assembly, the guide assembly comprising at least one guide carried on one of the seat pan subassembly and the lower frame assembly, and at least one slot formed on the other of the seat pan subassembly and the lower frame assembly, the at least one guide configured to travel along the at least one slot.
14 . The passenger seating configuration according to claim 8 , wherein the divan further comprises at least one first damper having a first end mounted to the backrest subassembly and a second end mounted to the seat pan subassembly, the at least one first damper, when fully extended, configured to prevent further rotation of the backrest subassembly toward the seat pan subassembly.
15 . The passenger seating configuration according to claim 8 , wherein the divan further comprises at least one second damper having a first end mounted to the seat pan subassembly and a second end mounted to the lower frame assembly, the at least one second damper configured to control vertical motion of the seat pan subassembly relative to the lower frame assembly.
16 . The passenger seating configuration according to claim 8 , wherein the lock assembly comprises:
a backrest lock subassembly comprising at least one lock mounted to one of the seat pan subassembly and the backrest subassembly, and at least one pin mounted to the other of the seat pan subassembly and the backrest subassembly, each lock configured to capture and release its respective pin;
a seat pan lock subassembly comprising at least one lock mounted to one of the seat pan subassembly and the lower frame assembly, and at least one pin mounted to the other of the seat pan subassembly and the lower frame assembly, each lock configured to capture and release its respective pin;
a first actuator positioned on and accessible from an inboard side of the divan;
a second actuator positioned on an accessible from an outboard side of the divan; and
cabling interconnecting each of the first and second actuators to each of the locks of each of the backrest lock subassembly and the seat pan lock subassembly.
17 . The passenger seating configuration according to claim 8 , wherein the lower frame assembly is fixed.
18 . The passenger seating configuration according to claim 8 , wherein, in use, rotational motion of the backrest subassembly and vertical motion of the seat pan may be separate or coordinated motions.
19 . A divan including two or more laterally adjacent seats, at least one of the seats comprising:
a lower frame assembly attachable to a floor;
an upper frame assembly comprising:
a seat pan subassembly movably attached to the lower frame assembly; and
a backrest subassembly rotatably attached to the seat pan subassembly; and
a lock assembly configured to lock at least one of rotational motion of the backrest subassembly relative to the seat pan subassembly, and motion of the seat pan subassembly relative to the lower frame assembly, the lock assembly comprising:
a backrest lock subassembly comprising at least one lock mounted to one of the seat pan subassembly and the backrest subassembly, and at least one pin mounted to the other of the seat pan subassembly and the backrest subassembly, each lock configured to capture and release its respective pin;
a seat pan lock subassembly comprising at least one lock mounted to one of the seat pan subassembly and the lower frame assembly, and at least one pin mounted to the other of the seat pan subassembly and the lower frame assembly, each lock configured to capture and release its respective pin;
a first actuator positioned on and accessible from an inboard side of the divan;
a second actuator positioned on an accessible from an outboard side of the divan; and
cabling interconnecting each of the first and second actuators to each of the locks of each of the backrest lock subassembly and the seat pan lock subassembly;
wherein, in use:
the backrest subassembly is configured to rotate between a first position in which the backrest subassembly is upright and a second position in which the backrest assembly overlays the seat pan subassembly; and
the seat pan subassembly is configured to raise and lower relative to the lower frame assembly.
20 . The divan according to claim 19 , wherein a height of the backrest subassembly, when the backrest subassembly is in the second position and the seat pan subassembly is fully lowered relative to the lower frame assembly, is not more than 20 inches, as measured from a floor to which the lower frame assembly is attached to a top of the backrest subassembly when in the second position.