The invention relates to a passenger oxygen mask such as oxygen masks used in aircraft.
In the aircraft of almost all airlines an oxygen mask is provided for each air passenger seat in the case of an emergency situation of a sudden drop in pressure occurring during flight at high altitude. The passenger oxygen masks are located in service units which for each seating group are usually located below the baggage compartments located in the upper cabin region. On reaching a certain pressure level, the oxygen masks hanging on belts fall automatically out of the service units. The belts are connected to a mechanism which activates the oxygen supply on pulling down the masks.
Apart from the oxygen masks, the oxygen generators or connection fittings of an external oxygen source, as well as comfort elements such as e.g. reading lights, steward call buttons, ventilation nozzles, optical displays and supply leads of these elements are installed in the service units. Accordingly, the space available for these safety and comfort elements is quite small.
Proceeding from this, it is the object of the invention to provide a passenger oxygen mask which is optimally adapted to the low spatial conditions in the service unit, but at the same time fulfils those ergonomic requirements for the breathing situation.
According to the invention a passenger oxygen mask is provided with at least parts of the mask body of a passenger oxygen mask formed or provided in a collapsible manner, by way of folds. This permits the reduction of axial overall height of the mask body, i.e. the distance between the sealing frame of the mask body which connects to the face and the proximal end of the mask body which is distant to this and to which a collection or retention flexible bag with a flexible tubing for the oxygen supply is connected. At the same time the number of folds in principle is infinite. In this manner the volume which is required in the service unit for accommodating the oxygen mask may be considerably reduced. The folding is effected by way of a mechanical force action, for example in the installation position of the service unit.
Advantageously the collapsible section of the mask body is arranged on that side of the sealing frame of the mask body connecting to the face, which is distant to the face spaced by a spacer section from the face. Thus the mask body which essentially has the form of a shell and consists of semi-elastic or elastic material may be compressed whilst the sealing frame whose contour is adapted to the shape of the face in the mask region and the spacer section is intrinsically stiff and may not be manipulated.
Usefully, the mask body in the region of the collapsible section is designed to unfold in an automatic manner. By way of this it is ensured that the passenger oxygen masks which are put away in the folded condition in the service units during normal flight operation and which fall from these given a pressure loss, unfold automatically and are thus available ready for use by the passengers.
Preferably the collapsible section of the mask body is designed in the manner of a bellows, i.e., the outer wall of the mask body in this section is folded in a manner such that peaks and troughs alternate in a regular manner. The bellows-like design of a section of the mask body permits the reduction of the overall height of the mask body since these may be compressed so much until the limbs of a fold which limit a peak or trough lie almost on one another.
Advantageously the collapsible section of the mask body is formed by crease folds. With this folding, the limbs of the peaks and troughs form corners. These corners form predefined crease locations for the compression of the mask body.
In place of crease folds, the collapsible section of the mask body may also have a wave-like folding. A uniform course of stress in the wall of the folded region results on account of this and thus a different loading of the material, which may be advantageous depending on the material applied.
Preferably the mask body comprises shape-stable support rings which are connected by elastic sleeves which are arranged therebetween. The support rings whose shape stability is increased by an enlarged wall thickness, shaping and/or the use of distortion-resistant materials, are arranged on the periphery of the mask body and give it the required stability in the radial direction. The elastic sleeves provided between the support rings permit the compression of the mask body in the direction of its overall height.
The collapsible section of the mask body advantageously comprises a spring helix. The spring helix circles around the elastic mask body or at least a part of this in a spiral-like manner. On compression, the mask body with the spring helix is pressed together against the effect of the spring force of the spring helix. When the compression force is relieved the spring helix is relaxed so that the mask body assumes its shape which is ready for application.
It is useful to incorporate a separate spring helix in the mask body. Thus during the manufacture of the mask body this spring helix may be cast into this without the structure of the spring helix affecting the surfaces of the mask body.
Advantageously the spring helix may also be designed as an integral spiral-shaped material thickening of the mask body. In this manner one requires no separate spring helix which needs to be fastened or cast on the mask body.
Preferably the spring helix is arranged on a wall of the mask body. With this the spring helix is preferably fastened on the inner side of the mask body.
The various features of novelty which characterize the invention are pointed out with particularity in the claims annexed to and forming a part of this disclosure. For a better understanding of the invention, its operating advantages and specific objects attained by its uses, reference is made to the accompanying drawings and descriptive matter in which preferred embodiments of the invention are illustrated.
The invention is hereinafter explained by way of embodiment examples shown in the drawings. There are shown in:
Referring to the drawings in particular,
One embodiment variant of a mask body 2′ is shown in
One side view of a mask body 2″ with an inwardly directed folding in a section 4″′ is represented in
While specific embodiments of the invention have been shown and described in detail to illustrate the application of the principles of the invention, it will be understood that the invention may be embodied otherwise without departing from such principles.
Number | Date | Country | Kind |
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10 2004 001 534.1 | Jan 2004 | DE | national |
This application is a continuation application of pending U.S. application Ser. No. 11/031,788, filed Jan. 7, 2005, which claims the benefit of priority under 35 U.S.C. §119 of German Patent Application DE 10 2004 001 534.1 filed Jan. 10, 2004, the entire contents of which are incorporated herein by reference.
Number | Date | Country | |
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Parent | 11031788 | Jan 2005 | US |
Child | 13453058 | US |