Browse Prior Art Database

Publication Date: 2016-Dec-08
Document File: 5 page(s) / 765K

Publishing Venue

The Prior Art Database


UNDER SEAT LEGROOM CONCEPT Abstract The seat pitch in conventionally arranged passenger seats in an aircraft is more/less not enough for an ergonomic acceptable and comfortable position during a flight. The tight seat pitch as well as a clash between a passenger's knee or shin and the seat in front is a problem within the normal usage of a passenger's seat. A solution of this problem is a modification of the floor in combination with the seat recline function. This proposal offers more leg space for passengers.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 72% of the total text.

Page 01 of 5


Reducing the seat pitch tends to reduce the available legroom for a passenger. Legroom is a valuable parameter as in this space passenger legs, feet and personal objects (i.e. backpacks) are to be confined. The geometry together with the human anatomy leads to few ergonomic positions that prevents the fully use of the available legroom.

Next figure shows a typical low seat pitch arrangement with the passenger in seating position:


1. Current Problem

Fig. 1: passenger in seating position

Page 02 of 5


Figure 2 shows the same configuration with the passenger trying to extend the legs and the clash between the shin and the seatback of the seat in front.

Clash between shin and seatback!

Unused legroom

Fig. 2: passenger with extended legs

Page 03 of 5


The proposal to improve the legroom of pax in Y/C in general but especially to improve it for the reclined seat position together with the chance of reducing seat pitch is described in the following. In order to achieve this extra comfort, the ensuing modifications have to be done:

 Floor profile has to be modified to allow an extra deepness under the front seat, this extra deepness allows the pax to stretch his/her legs;

 Seat bottom has to provide variable tilt to accommodate to the best ergonomic position

 Lumbar support is recommended

These changes together with the seat recline function offer a rather stretched position for Y/C and prevent knee and shin clashes with the front...