Aircraft Passenger Seat

Abstract

An aircraft passenger seat comprises a primary seat (1) having a seat back (3) and a seat pan (4), and a secondary support surface (5) located or locatable opposite the primary seat (1), the passenger seat being able to adopt each of an upright configuration, a reclined configuration and a substantially flat configuration, such that in the reclined configuration, the primary seat (1) is reclined relative to the upright configuration and the secondary support surface (5) is angled upwardly towards the primary seat (1) so as to support the lower leg(s) of a passenger seated in the primary seat (1); and in the substantially flat configuration, the secondary support surface (5) is substantially horizontal and the seat back (3), the seat pan (4) and the secondary support surface (5) form a substantially flat and continuous surface wherein the secondary support surface (5) is rotatable about an axis between the reclined and substantially flat configurations, said axis being translated between the reclined and substantially flat configurations.

Description

[0001]The present invention relates to an aircraft passenger seat, particularly but not exclusively to an aircraft sleeper seat convertible into a substantially flat bed.BACKGROUND TO THE INVENTION[0002]Examples of prior art aircraft sleeper seats are disclosed in the applicant's patent publications WO 96 / 18537 and WO00 / 21831, embodiments of which include the current British Airways First and Club World seats respectively. Both of these seats can be converted into a flat, horizontal bed, and have enjoyed great commercial success. However, there is intense competition to provide ever-greater comfort and space for aircraft passengers.[0003]Passenger seats for aircraft are subject to stringent design constraints, many of which are not applicable to seats for other vehicle types. One problem is the need to meet the relevant safety standards for aircraft passenger seats, such as the 16 g test that requires seats to survive deceleration of 16 g in a takeoff / landing position. Another probl...

AI Technical Summary

Benefits of technology

[0012]An advantage of this seating arrangement is that configurations suitable for sitting upright, reclining and sleeping can be provided. Hence, the seating arrangement may be comfortable for long periods during day or night flights. In the second, semi-reclined position the lower leg(s) of the passenger may be fully supported, thereby providing a comfortable reclining position without the need for a footrest. Another advantage is that these configurations may be provided by means of only three support surfaces (the seat back, seat pan and secondary surface), allowing a simple mechanism for moving the support surfaces into the different configurations.

[0014]Preferably, the secondary surface is pivotable to a substantially vertical, stowed position. An advantage of this arrangement is that the second surface may provide minimal obstruction to a passenger leaving the primary seat. The secondary surface may be pivoted upwardly to the substantially vertical position, which is advantageous in that it allows a comparatively long secondary surface and a comparatively short mechanism for the secondary surface. Advantageously, the secondary surface may be stowed up against a housing, such as that of a seating arrangement of another passenger. Part of the mechanism of the secondary seat may be housed within that housing.

[0016]Preferably, the mechanism is also able to secure the support surface in a third, substantially horizontal position displaced in a vertical direction from the first position. Preferably, the third position is also displaced in a horizontal direction from the first position. An advantage of this arrangement is that the support surface may act as a leg rest for the passenger both in a semi-reclined and a sleeping position, while also acting as a foot rest for the passenger in an upright sitting position.

[0018]Preferably, the mechanism is arranged to secure the support surface such that the support surface is able to move downwardly if a force or torque greater than a predetermined threshold is applied downwardly to the support surface, and the support surface is able subsequently to return to its secured position; in other words, the mechanism gives way but is not damaged. An advantage of this arrangement is that, when stepped on or sat upon, the support surface at least partially moves out of the way of the passenger.

Problems solved by technology

Passenger seats for aircraft are subject to stringent design constraints, many of which are not applicable to seats for other vehicle types.

One problem is the need to meet the relevant safety standards for aircraft passenger seats, such as the 16 g test that requires seats to survive deceleration of 16 g in a takeoff / landing position.

Another problem is the need to minimize the weight of the seat, since carrying extra weight on an aircraft increases fuel consumption and therefore monetary and environmental cost.

Another problem relates to the use of space.

Another problem relates to the level of comfort of the seat.

Another problem relates to the psychological and / or social needs of aircraft passengers, who may desire privacy while working, eating or sleeping, or may wish to interact with a travelling companion.

There are also some arrangements that are undesirable for aesthetic and / or psychological reasons; for example, it is preferred that parts of the seat mechanism are not visible to the passenger.

However, this arrangement does not allow the sleeping surface to be horizontal.

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