Abstract:
A survival aid which includes an inflatable floating body provided with a compressed gas cartridge for inflating the floating body, a bag for accommodating the floating body in an uninflated state, the bag being provided with looped tabs and a securing pin which extends through the looped tabs whereby upon the removal of the securing pin from the looped tabs, the floating body is released from the bag in an inflated state.

Description:
TECHNICAL FIELD OF THE INVENTION 
     The invention relates to a survival aid, in particular for swimmers and those practising water sports, comprising an inflatable floating body, according to the preamble of claim  1 . 
     PRIOR ART 
     DE 20 2012 007 334 U1 discloses a generic survival aid. The survival aid described in this document consists of, inter alia, an inflatable floating body, a compressed gas cartridge coupled to the inflatable floating body by means of a coupling member, and a bag which has a cover and into which the floating body is folded up when not inflated. The bag comprises two walls (referred to as front and back walls), the upper edges of which surround the opening of the bag. In the operational idle state, the opening is closed by the cover. 
     In the initial state, the gas path from the compressed gas cartridge to the inner space of the floating body is blocked. The coupling member has, however, a mechanism for unblocking the flow which comprises an actuating element. If said actuating element (for example a lever) is actuated, the mechanism for unblocking the flow (in general by destroying the closure cap of the compressed gas cartridge) unblocks the gas path. The user can use a release cord to actuate the actuating element, the first end of said cord being connected to the actuating element. 
     The result is a very light-weight and compact survival aid which can be worn around the user&#39;s waist by means of a type of belt. In emergencies, for example when the swimmer gets cramp, he pulls on the release cord and the floating body unfolds, without any further action required, out of the bag opening as a result of it filling with compressed gas, such that a floating body is provided to which the user, for example the swimmer, can hold on. This provides a simple way of bridging the time it takes for the swimmer to recover or for help to arrive. The generic survival aid is both very effective and tried and tested. 
     OBJECT OF THE INVENTION 
     Proceeding from this prior art, the object of the invention is to improve a generic survival aid so as to better secure it against accidental opening of the bag and/or accidental actuation of the actuating element. Improved security of this kind can be particularly advantageous if the survival aid is used when surfing, riding waves or kite surfing. 
     This object is achieved by a survival aid having the features of claim  1 . 
     The basic structure of the survival aid is as described in DE 20 2012 007 334 U1, and therefore reference is hereby explicitly made to the disclosure of said document. According to the invention, looped tabs extend from the upper edges of the first and second walls of the bag (referred to as the front wall and rear wall in the category-defining document DE 20 2012 007 334 U1), through which looped tabs a securing pin extends when in the idle state. A pull element connected to the actuating element of the coupling member extends towards said securing pin and is connected to the securing pin, preferably substantially in the centre thereof, in a tension-proof manner. A serial actuation process is initiated by axially removing the securing pin from the looped tabs: the securing pin is first removed from all the looped tabs, as a result of which the opening is opened, or, if an additional cover is provided, which is the preferred case, a “pre-open state” of the bag is reached. Only after the pin has been completely removed from the looped tabs can the pull element be subjected to tensile stress, so that the actuating element is actuated by additional pulling on the securing pin. Although it is just as simple to actuate the survival aid of this kind as it is to actuate the survival aid of the prior art (which only requires a single linear pulling motion), inadvertent opening of the bag or inadvertent actuation is practically ruled out. 
     Preferred embodiments of the invention can be found in the dependent claims and in the embodiment described in more detail hereinafter with reference to the figures. 
     The invention is explained in more detail on the basis of a preferred embodiment and with reference to the drawings, in which: 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  shows all the components of a survival aid according to the invention, 
         FIG. 2  shows the bag from  FIG. 1  from direction R 1 , 
         FIG. 3  shows the bag from  FIG. 1  after the floating body has been folded up into the bag, 
         FIG. 4  shows the configuration in  FIG. 3 , indicating how the cover is folded up into the bag, 
         FIG. 5  shows the configuration in  FIG. 4  once the cover has been folded in, 
         FIG. 6  shows the configuration in  FIG. 5  once the securing pin has been threaded through the looped tabs, 
         FIG. 7  shows the configuration in  FIG. 6  from viewing direction R 2 , and 
         FIG. 8  shows the configuration in  FIG. 7  once the securing pin has been removed from the looped tabs. 
     
    
    
     DESCRIPTION OF PREFERRED EMBODIMENTS 
       FIG. 1  shows all the components of the described preferred embodiment of the survival aid. This survival aid substantially consists of three parts, specifically a floating body  10 , to which a compressed gas cartridge  20  can be coupled, a bag  30  and a securing pin  70 . The floating body  10  and bag  30  are interconnected by means of a connecting cord  62 . Said connecting cord is preferably approximately 60 cm in length. 
     The floating body will be discussed first: 
     The floating body is elongate, i.e. its length in the y direction is greater than its width in the x direction. The dimensions (including edges) are preferably the following: length approximately 70 cm, width approximately 20 cm, so that the inflated floating body has a volume of approximately 9 liters. The floating body can consist of either a film-like material or fabric. The coupling member  12  is rigidly and tightly connected to the floating body, and the aforementioned compressed gas cartridge  20  can be screwed into said coupling member ( FIG. 1  shows the screwed-in state). In particular, any commercially available, small CO 2  compressed gas cartridge can be used as the compressed gas cartridge, as is used for example in home beer taps. When in the idle state, the closure cap of the CO 2  compressed gas cartridge is closed so that the gas path between the CO 2  compressed gas cartridge  20  and the inner space of the floating body  10  is blocked. A pull cord  26  is provided which pivots an actuating element, which is a lever  14  in the embodiment shown, when a corresponding tensile stress is applied, as a result of which said lever actuates a spindle in the coupling member  12 , which punctures the closure cap of the CO 2  compressed gas cartridge  20 , therefore destroying it. This technique is well-known in the field of life jackets and does not need to be explained in detail here. In order to stow the floating body  10  in the bag  30  (described below), the floating body is preferably folded in the y direction in the form of a concertina. 
     The pull cord  26  which forms the pull element is, in the embodiment shown, an end portion of a cord which first extends through a first hole  70   a  located substantially in the centre of the securing pin  70 . The cord extends from this first hole  70   a  through additional holes (two parts  70   b ,  70   c  in the embodiment shown) and is arranged at one end of the securing pin in loops which carry a grip element  72 . The loops of the cord which carry the grip element form a flexible connection  74  which connects the securing pin  70  to the grip element  72 . The provision of such a flexible connection  74  is very advantageous since a rigidly protruding grip element could, on the one hand, get slightly damaged, and on the other hand would constitute a risk of injury. The cord can be held on the securing pin by additional means, for example heat shrink tubing, said means however not being shown for reasons of clarity. It is preferable, but not compulsory, for the pull cord  26  and the flexible connection  74  to each be portions of a common cord. A signal device in the form of a battery-operated light and/or in the form of a signal whistle (not shown) can be arranged in the grip element  72 . 
     The bag  30  will now be described: 
     The bag comprises four portions, specifically a first (rear) wall  32 , a second (front) wall  34 , a cover  44  and a substantially V-shaped connecting element  42 . The first wall  32 , second wall  34  and cover  44  can in principle be produced from one blank. However, it is also possible for each portion to use a separate blank and for these blanks to be interconnected, in particular sewn together. The first wall  32  and the second wall  34  surround a receiving space and are in this case directly interconnected along a base  36  and along a side, referred to here as the second side  40 . The first and second walls are also interconnected by means of a first side  38 . This first side  38  is formed by the aforementioned connecting element  42 , which is connected to the first wall  32  and to the second wall  34 . This thus forms an opening O which extends from the first side  38  to the second side  40  and is opposite the base  36 . The cover  44  extends from the upper edge of the first wall  32 . A press stud  50  and a mating press stud  52  are fastened to the connecting element  42  and in such a way that their operative faces point outwards when in the state shown in  FIG. 1 , i.e. when the connecting element  42  is folded outwards. In this case, the press stud  50  and the mating press stud  52  are each located near the upper edge of the first wall  32  or of the second wall  34 , respectively. In the state shown in  FIG. 1 , there is therefore an unfolded, enlarged first side  38  and an opening O having an opening angle of more than 0°. If the connecting element  42  is folded inwards (i.e. in the direction of the arrow) and the press stud and mating press stud are interconnected, the first side is reduced in size, virtually to a line, in accordance with the second side  40 . A hook-and-loop element (not shown) is fastened to the inner side of the second wall  34  and a mating hook-and-loop element  46  is fastened to the outer side of the cover  44 . A fastening belt  60  is held on the outer side of the first wall  32 . Arranged on the front ends of said belt  60  are a clasp and a mating clasp (not shown), in particular consisting of plastics material like that often used for rucksacks, for example. Therefore the bag can be worn, in particular around the waist, by means of the belt. 
     Looped tabs extend from each of the upper edges of the two walls  32 ,  34 , i.e. the edges which are adjacent to the opening O, wherein the looped tabs extending from the first wall  32  are referred to as the first looped tabs  33   a  to  33   c  and the looped tabs which extend from the second wall  34  are referred to as the second looped tabs  35   a  and  35   b . In the embodiment shown, three looped tabs extend from the first wall  32  and two looped tabs extend from the second wall  34 . In principle, it is necessary for at least one looped tab to extend from one wall and at least two looped tabs to extend from the other wall, an odd number of looped tabs being preferred. In the embodiment shown, the first (rear) wall is the wall which bears more looped tabs than the other wall (i.e. the second, front wall in this case); this could, however, be the other way round. As will be seen below in particular with reference to  FIGS. 3 to 8 , the looped tabs are arranged so as to be offset in such a way that they are in a row, i.e. a kind of “zip”, when the looped tabs are pivoted towards one another. This means that every second looped tab is then positioned between two first looped tabs, the central first looped tab (the looped tab  33   b ) is positioned between the two second looped tabs and the first looped tabs  33   a  and  33   c  positioned at the edge are each adjacent to a second looped tab. All the looped tabs are formed as hemmed strips of fabric, i.e. as loops. 
     The transition from the state shown in  FIG. 1  to the use state shown in  FIG. 6  (also referred to as the idle state), in which the coupling member  12  is in its initial state, occurs as follows: the uninflated floating body  10  is rolled or preferably folded in the y direction, and then inserted into the inner space of the bag  30 , i.e. between the front wall  32  and the rear wall  34 . Depending on the specific geometric design, another second fold may be necessary in the x direction in this case. The connecting element  42  is then folded inwards and the press stud  50  and mating press stud  52  are fastened to one another so that the first side  38  has a smaller depth. The cover is then inserted ( FIG. 4 ) so as to be positioned between the floating body package and the second wall such that the hook-and-loop element and the mating hook-and-loop element mutually engage ( FIG. 5 ). The last two steps mentioned can also be carried out in the opposite sequence. Finally, the securing pin  70  is inserted through the looped tabs until the state shown in  FIG. 6  is reached. Due to the fact that the pull cord  26  is connected to the securing pin in the centre thereof, the pull cord is retracted into the looped tabs along with the securing pin, such that it is not accessible from the outside and in particular so that it cannot get caught anywhere. The length of the pull cord is such that the pull cord is completely retracted when the securing pin  70  is inserted. However, as soon as the securing pin is completely removed from all the looped tabs, said cord can be subjected to tensile stress. This geometry is clearly shown in  FIGS. 7 and 8 . 
     When actuating the survival aid, the securing pin  70  is removed from the looped tabs by means of the grip element  72  in a linear pulling motion. Once said pulling motion has finished, the pull cable is subjected to tensile stress and actuates the lever  14  ( FIG. 8 ). If the pull cord  26  (i.e. the pull element) is connected to the securing pin substantially in the centre thereof, as shown, this has the advantage that a minimum actuating path can be achieved. When the pull cord  26  is subjected to tensile stress, the outer side of the cover  44  is still connected to the inner side of the second wall  34  due to the hook-and-loop connection, as a result of which the floating body is prevented from being pulled out of the bag  30  before the actuating element of the coupling member (i.e. the lever  14 ) has been actuated by the pull cord. Therefore, the cover  44  does not only have an additional protective function, but also plays an important role in the triggering process. Using a hook-and-loop fastener for the releasable connection between the cover and the second wall constitutes a preferred option, however use of a different closure means which opens when a specific force is applied would also be possible. A pair of press studs is given here as an example of this. 
     When it unfolds, the floating body opens both the hook-and-loop connection between the cover and the second wall  34  and the connection, formed by the press stud and the mating press stud, of the first side  38 , which unfolds immediately thereafter, thus increasing the opening angle of the opening as described in DE 20 2012 007 334 U1. As a result of this, the longitudinal section of the bag assumes the shape of a skewed trapezium, i.e. the bag widens towards the top and the floating body can unfold upwards without hindrance. The now inflated floating body  10  then leaves the bag completely, but is held by the connecting cord  62  to the bag and therefore to the person wearing the bag, so that the floating body  10  is at their immediate disposal. 
     LIST OF REFERENCE NUMERALS 
     
         
           10  floating body 
           12  coupling member 
           14  lever 
           20  compressed gas cartridge 
           26  pull cord 
           30  bag 
           32  first wall 
           33   a - c  first looped tab 
           34  second wall 
           35   a - c  second looped tab 
           36  base 
           38  first side 
           40  second side 
           42  connecting element 
           44  cover 
           46  hook-and-loop element 
           50  press stud 
           52  mating press stud 
           60  fastening belt 
           62  connecting cord 
           70  securing pin 
           70   a - c  hole 
           72  grip element 
           74  flexible connection