Pivotable seat, especially for a flight attendant

Details Pivotable seat, especially for a flight attendant Pivotable seat, especially for a flight attendant

1988-06-30

1991-02-19

Barefoot, Galen

Aeronautics and astronautics

Aircraft structure

Fuselage and body construction

297 13, 297 14, 297331, B64D 1106

Patent

active

049936662

DESCRIPTION:

BRIEF SUMMARY
FIELD OF THE INVENTION

The invention relates to a foldable seat especially for use by a flight attendant in an aircraft.


BACKGROUND INFORMATION

Prior seats of this type comprise an inner frame for taking up any loads which are active on the seat and an outer covering for appropriately defining the shape of the seat. In this context it is known to produce the carrying frame, for example as a welded construction of light metal tubes or profile sections, or as a cast part of a corresponding light metal alloy.
For the welded construction a relatively large number of separate parts must be produced, prepared, and connected with each other in several welding operations, whereby this manner of production entails a high labor cost.
In the case where the carrying parts of the seat are produced as cast parts, the possibility exists to construct the respective part as a single component with all the details. However, it must also be considered that, for cast parts for reasons of material strength, material additions are necessary which have a disadvantageous effect with regard to the weight. Besides, cast parts still require a milling operation. Furthermore, on the one hand the use of the die casting process is only economically worthwhile for relatively large numbers of parts due to the high costs of a corresponding mold, and on the other hand, the use, for example, of a high quality casting process entails high labor costs even for small numbers of parts.
Because of the permit requirements for seats in aircrafts, the production thereof requires exhaustive production controls including X-ray examinations of welded constructions and of cast parts.
It has been observed that prior seats of this type have the habit that, after the seat has been pivoted into its recess, the seat could tilt itself out of its recesses again, if the pivoting into the recess is not carried out according to the proper method, that is to say, until secure locking is achieved Thus, in an emergency situation the seat might block an important escape route or hinder rescue measures


OBJECT OF THE INVENTION

Accordingly, it is the object of the invention to construct a seat of the above general type in such a manner, that it may be produced at lower costs and with a lower weight while posing a lower accident risk while still meeting the above mentioned permit requirements.


SUMMARY OF THE INVENTION

According to the invention there is provided a pivotable seat, especially for a flight attendant in an aircraft, wherein a backrest with a seat part is constructed for pivoting about an approximately vertical axis and the seat surface is constructed for pivoting about an approximately horizontal axis secured to a carrying structure of the aircraft, characterized in that carrying parts of the seat, such as the seat plate and the back plate, are constructed as one-piece milled parts and/or a spring is provided which is activated by tilting up the seat part and pivots the seat into a recess.
The suggested seat may be produced at a lower cost and has a lower weight as compared to prior seats. In order to pivot the seat out of the use position into a recess for storage during non-use, only the locking of the seat part must be released, whereby, the seat part tilts itself into the vertical position thereby activating a spring which pivots the seat into the recess. The locking in the pivoted-in position is achieved automatically.
In addition to the advantage of effectively storing the seat even under unfavorable space conditions, known as compared to from pivotable seats, the suggested seat has the further advantage that malfunctions cannot arise as they tend to do in seats which are manually pivotable.


BRIEF DESCRIPTION OF THE DRAWINGS

The invention shown in the drawings will now be described in detail by way of example, with reference to the accompanying drawings, wherein:
FIG. 1 is a perspective view of the present seat ready for use;
FIG. 2 is the seat of FIG. 1 pivoted into its recess, whereby the back of the seat is visible;
FIG. 3 is a view in

REFERENCES:
patent: 330223 (1885-11-01), Gaylord
patent: 656583 (1900-08-01), Levin
patent: 2177263 (1939-10-01), Noe
patent: 3131964 (1964-05-01), Reed
patent: 3594037 (1971-07-01), Sherman
patent: 4460215 (1984-07-01), Chamberlain et al.
patent: 4740030 (1988-04-01), Nordskog

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