US20090301532A1 - Self-Inflating Screening Shield, in Particular Umbrella - Google Patents

Self-Inflating Screening Shield, in Particular Umbrella Download PDF

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Publication number
US20090301532A1
US20090301532A1 US12/224,570 US22457007A US2009301532A1 US 20090301532 A1 US20090301532 A1 US 20090301532A1 US 22457007 A US22457007 A US 22457007A US 2009301532 A1 US2009301532 A1 US 2009301532A1
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United States
Prior art keywords
inflating
self
envelope
screening shield
chemical
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Abandoned
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US12/224,570
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English (en)
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Rolf Vaitl
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Individual
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Individual
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    • A—HUMAN NECESSITIES
    • A45—HAND OR TRAVELLING ARTICLES
    • A45B—WALKING STICKS; UMBRELLAS; LADIES' OR LIKE FANS
    • A45B19/00—Special folding or telescoping of umbrellas
    • A45B19/02—Inflatable umbrellas; Umbrellas without ribs

Definitions

  • the present invention relates to a self-inflating screening shield, in particular umbrella, according to the preamble of claim 1 .
  • the invention also relates to a self-inflating balloon according to the features of claim 10 .
  • an umbrella in a number of documents, it has therefore been proposed to configure an umbrella as an inflatable umbrella that is inflated for use and can otherwise be transported in a practicable manner in a folded-together form.
  • a gas-filled envelope replaces the screening material commonly tensioned by metal struts, thus ensuring the necessary stiffness.
  • Document DE 20 2004 002 172 U1 describes an umbrella or sunshade which is provided with an inflatable umbrella- or disk-shaped air chamber coupled to a compressed air cartridge.
  • a valve which can be actuated by a push-button, it is possible to control the supply of air from the cartridge to the air chamber.
  • the umbrella or sunshade is no longer needed, the air is released from the air chamber by means of the valve and the umbrella or sunshade is folded up and stowed in a case.
  • a compact, self-inflating umbrella for once-only use is proposed.
  • the umbrella is provided with a case, the bottom portion of which serves as a handle member when using the umbrella.
  • a pressure vessel filled with a pressurised boiling liquid is disposed inside the case, near the bottom thereof.
  • the inflatable shielding screen is stowed away in a folded state inside the case.
  • a closure element of the pressure vessel is broken away by external mechanical action so that the liquid escapes through the opening thus produced, expands thereby and is guided as a gaseous substance into the inflatable chambers of the screening shield.
  • the screening shield is pressed out of the upper part of the case and unfolds to its full size.
  • the umbrella is thrown away after one use.
  • the proposed umbrellas include bulky elements such as handle members, cases or gas production devices, with the result that, in the unopened state, they are still too bulky and require too much space.
  • a decisive technical advance compared to standard telescoping pocket umbrellas cannot be achieved with such approaches.
  • the gas production devices provided in them for inflating the screening shield are too complex in design and too expensive to produce, with the consequence that inflatable umbrellas produced in this manner, especially those for once-only use, can not be offered at an attractive price.
  • the object of the present invention is therefore to specify a self-inflating umbrella which is space-saving when not in use and which can also be produced with less production effort.
  • the object of the present invention more particularly, is to define a self-inflating umbrella which essentially no longer contains any bulky elements.
  • a self-inflating screening shield according to the present invention comprises an inflatable envelope made of flexible material, wherein a gaseous substance can be produced inside the envelope by means of a chemical reaction.
  • said screening shield is an umbrella.
  • said screening shield is a sunshade.
  • the present invention thus proceeds from the basic realisation that the devices proposed in the published prior art for providing or producing a gas for inflating the shielding envelope are invariably too voluminous in design and therefore too bulky, since the medium to be used for inflation must be enclosed in a pressure-tight container when not in use, be it in the form of a compressed air cartridge or a pressurised boiling liquid enclosed in a container.
  • One essential idea of the present invention is therefore to provide the gaseous substance for inflating the umbrella in some other manner that obviates the need to use bulky containers. This is made possible by the present invention.
  • the inventive idea provides the basis for storing certain starting substances, with the aid of which the gaseous substance is to be produced, without using rigid pressure vessels as storage.
  • Another advantage is that individual chambers can be separately filled with gas by means of said starting substances.
  • two or more chemical substances can be disposed, as starting substances for the chemical reaction, spatially separate from each other inside the envelope, and the chemical reaction can be triggered, in case of use, by the chemical starting substances being brought into contact with each other. This basically obviates the need for the chemical starting substances to be accommodated in rigid, pressure-tight containers. It is not even necessary, in essence, for them to be accommodated in containers at all when in their initial state.
  • one exemplary and advantageous embodiment provides that at least one of the chemical substances is accommodated in a container which can be opened externally by the effect of pressure, such that the chemical substance contained therein is released and can come into contact with the respective other chemical substance.
  • the container is disposed at a defined position inside the envelope, and that a marking is applied at a location on the outer wall of the envelope which is closest to said position.
  • the marking which may also be configured as a predetermined breaking point, serves to indicate to the user that the marked place be pressed in case of use, thus opening the container by the effect of pressure.
  • the container may be provided, for example, with a flexible outer skin, so that the container can be made to rupture by the effect of mechanical pressure, and the chemical substance contained therein can escape.
  • the container may be configured in such a way that it is opened by tensile force.
  • a plurality of separate air chambers are provided, and each air chamber is filled with air by means of a chemical reaction specific to that chamber. In one embodiment there are two such chambers, in another embodiment three chambers, in another embodiment four chambers and in yet another embodiment five chambers.
  • the shielding screen is filled with one chamber, while the handle is filled with a separate chamber. In this way, the user can firstly open the shielding screen by means of a first reaction, and then “open” the handle by triggering a second reaction.
  • the shielding screen is only partially fitted with air chambers, with material, for example, being provided between the chambers.
  • the chambers are located where the frame for opening the shielding screen is normally located.
  • the chambers are attached in a star-shaped formation in such a way that the shielding screen is opened between them.
  • the chambers can also be filled with gas separately in this way, with each chamber then being assigned a specific mixture of chemicals. This advantage is absent from the prior art, since a plurality of pressure cartridges cannot be used.
  • a first chemical substance may contain or consist of a solid
  • a second chemical substance may contain or consist of a liquid
  • the chemical reaction may consist in the solid being dissolved by the liquid, with the gaseous substance being one of the reaction products.
  • the solid may contain or consist of sodium carbonate (washing soda) or sodium bicarbonate (baking soda), and the second chemical substance may comprise an acid.
  • washing soda sodium carbonate
  • baking soda sodium bicarbonate
  • the second chemical substance may comprise an acid.
  • gaseous CO 2 is produced as the reaction product.
  • Citric acid practicably as an ingredient of lemon juice, or tartaric acid may be used as the acid.
  • a different solid which can be dissolved in a liquid may be chosen for the first chemical substance such that a gaseous substance such as CO 2 or O 2 is released when the solid is dissolved in the liquid.
  • the solid may also be provided by a kind of effervescent powder, and the liquid in the simplest case by water, so that the desired result of a chemical reaction, with the formation of a gaseous substance, can likewise be achieved.
  • the solid should preferably be present in the form of a powder or granulate, so that it has as much free surface exposed to the liquid as possible.
  • bulk sodium bicarbonate preferably in the crystal phase (e.g. 4.88 g (58 mmol)), and a solution of citric acid and water, preferably 3.78 g (19.7 mmol) citric acid and 16 ml water, which is e.g. sealed into a thin plastic bag (e.g. 6 ⁇ 6 cm format), are provided in the loop which is configured as a carrying handle.
  • the aforementioned quantities produce 1.3 litres in volume of gas, which, in a shielding screen with a volume of 1 litre, produces the slight 0.3 bar of overpressure necessary to unfold said shielding screen.
  • the advantage is that the combination of substances can be stored in this form without limits, which is important particularly in the case of a disposable shielding screen.
  • the plastic bag is preferably made to rupture by applying pressure, for example by a finger, and the formation of CO 2 occurs without further extrinsic action, thus making the screening shield unfold.
  • a kind of ripcord which opens the bag of liquid may also be attached.
  • Sodium bicarbonate is preferred because it is twice as effective as sodium carbonate. Furthermore, it is safer and more environmentally friendly because it is not as strongly alkaline as sodium carbonate.
  • acids are malic acid, tartaric acid, succinic acid, amidosulphonic acid or fumaric acid, for example.
  • the criterion for selection is the lowest possible level within the classification of hazardous substances.
  • the aforementioned acids, including citric acid, are classified as “irritant”, whereas acetic acid, for example, is “corrosive”.
  • a low classification as hazardous substance is advantageous.
  • An acid classified as “irritant” is therefore preferred.
  • the overpressure ⁇ p in the chamber is preferably more than 0.1 bar, more preferably between 0.1 and 2 bar, even more preferably between 0.2 and 1 bar, and especially preferably between 0.3 and 0.5 bar. A higher pressure may be used in the case of stronger material.
  • coloured substances or dyes are carried by the gas (CO 2 ) which propagates in the screening shield, said coloured substances or dyes being fluorescent or phosphorescent, or made to glow in some other way.
  • a handle member in the form of a flexible loop may also be provided at a position on the outer wall of the envelope.
  • the self-inflating screening shield is folded together in its initial state to a very space-saving size, since it no longer has any bulky, space-consuming parts.
  • a self-inflating screening shield can be carried easily in a jacket or trouser pocket. When needed, it can be activated by applying pressure is to the marking on the outer skin of the envelope so that the chemical reaction is initiated inside it. Due to the vacuum inside the envelope or inside the chambers to be inflated, when in the initial state, the gaseous substance produced by the chemical reaction flows very rapidly into the envelope or chambers and thus inflates these very quickly, with the result that the screening shield or umbrella is available within a very short period of time. Since the screening shield is envisaged for once-only use, it may be thrown away as soon as it is no longer needed. After use, the chemicals used to inflate the screening shield are absolutely non-hazardous, are neutral in water, do not pose a hazard for water resources and are biodegradable.
  • a material such as that used in vehicle airbags is used.
  • the air chambers may have threads or transversal connectors on the inside.
  • the upper and lower sides may be connected, or the lateral sides.
  • the air chamber may be bowl-shaped.
  • a water-repellent material is preferred.
  • the screening shield may also have a double-walled construction. Parts of the screening shield may comprise carbon nanotubes. These may be embedded in the screening shield material. Kevlar fibres may also be used.
  • PET Polyethylene terephthalate
  • BOPET biaxially oriented polyethylene terephthalate
  • Mylar® is characterised above all by its high tensile strength, chemical resistance, plastic stability and translucency or transparency, and is an electrical insulator. These properties are advantageous for the inventive screening shield.
  • the screening shield is made by sewing, welding or glueing, for example. Air-tightness is important both for the selection of material and for production.
  • the handle may be connected to the screening shield by threads.
  • the preferred connection is one which provides the longest path between the outer edge of the screening shield and the handle. A radial distribution is preferred.
  • the material of the screening shield may be coloured or transparent. It can also be phosphorescent or fluorescent. The material of the screening shield may have a signal colour.
  • the screening shield has an edge which prevents water from flowing under the screening shield.
  • an air chamber forming a bulge is provided in the shape of a circle around the edge of the screening shield.
  • the chambers which hold the chemicals have predetermined breaking points. If the chemicals are in bags, said bags may have perforations.
  • the screening shield is rod-shaped when in the folded-together state.
  • the predetermined breaking point is preferably provided in the middle of the rod so that the chemical reaction is triggered by simply pressing against the predetermined breaking point of the rod or breaking the same.
  • the material of the screening shield is folded using the origami technique after it has been glued or welded.
  • the material of the screening shield is itself biodegradable.
  • FIG. 1 shows a perspective view (seen at an angle from above) of a first embodiment of a self-inflating screening shield or umbrella in the inflated state;
  • FIG. 2 shows a perspective view (from below) of the first embodiment as shown in FIG. 1 ;
  • FIG. 3 shows a cross-sectional view of a central chamber of the envelope of the self-inflating umbrella
  • FIG. 4 shows a plan view of the folded-together umbrella, with the uppermost located central chamber
  • FIG. 5 shows a perspective view (seen at an angle from above) of a second embodiment of a self-inflating umbrella according to the invention.
  • FIG. 1 shows a perspective view from above of a first embodiment of a self-inflating umbrella according to the invention.
  • the self-inflating umbrella 10 essentially comprises an inflatable envelope 11 made of a flexible material, for example of a suitable plastic material such as polypropylene or the like. A suitable film material may also be used, as an alternative.
  • an inflatable envelope 11 made of a flexible material, for example of a suitable plastic material such as polypropylene or the like.
  • a suitable film material may also be used, as an alternative.
  • Envelope 11 is produced in such a way that, when inflated, it adopts the shape of a dome as shown in FIG. 1 , which can be held above one's head as a protection against rain.
  • FIG. 1 shows a perspective view from below as shown in FIG.
  • a loop 13 made of a flexible material is attached to a central portion on the concave side of the dome, through which loop a hand can be placed when in use, so that the umbrella 10 can be held securely and reliably above the carrier's head.
  • the umbrella 10 can be produced in different sizes. In the smallest embodiment, the diameter of the dome is just large enough for the head of the user to be covered. In somewhat larger embodiments, the dome can have a diameter of such size that the shoulder area of the user is covered as well.
  • Envelope 11 may contain a central chamber 12 which may be of circular shape when viewed from above and the dimensions and boundaries of which may be visible to the outside. Production of the gaseous substance for activating and inflating umbrella 10 occurs in the central chamber 12 .
  • the central chamber 12 is shown in cross-section and in a plan view, respectively.
  • a container 12 . 2 containing citric acid or lemon juice is attached to a bottom surface 12 . 1 .
  • a granulate or powder 12 . 3 consisting of washing soda (sodium carbonate) or baking soda (sodium bicarbonate) is disposed.
  • a marking 12 . 4 is applied to the outer convex side of envelope 11 .
  • the outer wall of envelope 11 can be pressed in at this marking as far as container 12 . 2 , such that container 12 . 2 can be compressed and made to rupture.
  • the outer skin of envelope 11 may be either wholly transparent, or transparent only in the region of central chamber 12 , so that the user can visually perceive container 12 . 2 and can also observe the gas production process after container 12 . 2 has been forced to rupture.
  • Container 12 . 2 may consist of a small envelope or bag shaped out of plastic and filled with citric acid or lemon juice, which is square in shape and welded together at one or several of its lateral boundaries. When compressed, the envelope preferably tears at one or several of these seams. As is shown in FIG. 4 , suitable precautions can be taken so that container 12 . 2 ruptures on one side only and hence its contents escape in one direction only, namely in the direction of the granulate 12 . 3 . As shown, container 12 . 2 may be additionally reinforced at three lateral boundaries and connected to the floor side 12 . 1 . When compressed, container 12 . 2 thus ruptures only on the left side. There a production-related seam may be located, or a predetermined breaking point, such as a perforation or the like, may be alternatively or additionally provided in the outer skin of container 12 . 2 .
  • gaseous CO 2 in the present embodiment or it is provided alternatively with a dense network of pores through which only the gaseous substance can pass.
  • the liquid is able to escape without coming into contact with the granulate 12 . 3 .
  • the liquid may have a surface tension which ensures that it cannot pass through the pores of membrane 12 . 5 .
  • the granulate consists of washing soda, i.e. sodium carbonate with the chemical formula Na 2 CO 3 , or of baking soda, i.e. sodium bicarbonate with the chemical formula NaHCO 3 .
  • the acid used to dissolve the sodium (bi)carbonate granulate is citric acid with the chemical formula C 6 H 8 O 7 .
  • Lemon juice contains 5-7% citric acid, so it is possible in the simplest case for container 12 . 2 to contain lemon juice. Gaseous CO 2 is produced as a reaction product when the sodium (bi)carbonate granulate is dissolved in citric acid.
  • the equation for this chemical reaction is the following:
  • the gaseous CO 2 thus produced escapes very rapidly through the pores of membrane 12 . 5 into chamber 12 and from there into the remaining interior of envelope 11 , thus inflating envelope 11 .
  • the base portion of envelope 11 may have a slightly greater thickness in the region of the central chamber 12 than the rest of the outer skin of envelope 11 , in order to ensure the requisite stability and strength in said region.
  • loop 13 made of flexible material is externally attached to said base portion. Loop 13 preferably consists of a thin, space-saving layer of a suitable plastic material such as polypropylene.
  • the outer edge of envelope 11 is also shown in FIG. 3 .
  • an upper envelope portion 11 . 1 can be welded together in this region with a lower envelope portion 11 . 2 along a circumferential seam 11 . 3 .
  • FIG. 4 is simultaneously a plan view of the folded-together screening shield.
  • the product is folded in such a way that the depicted square around the central chamber 12 results, wherein envelope 11 and loop 13 are folded together in a suitable manner in an image plane behind the square shown, and are connected to said square.
  • Their actual proportions can correspond approximately to those shown in FIGS. 3 and 4 .
  • the square pack can therefore be easily carried in a pocket of an article of clothing. If desired, however, the square pack can be kept in an adapted case, in particular to avoid the screening shield being unintentionally triggered.
  • FIG. 5 shows a perspective view, seen at an angle from above, of a second embodiment of a self-inflating umbrella according to the invention.
  • the self-inflating umbrella 20 has an envelope 21 which is provided with a number of inflatable channels 21 . 1 projecting radially from a central chamber 22 , between which channels single-layered regions 21 . 2 not shaped as envelopes extend.
  • Chamber 22 has substantially the exact same shape as chamber 12 in FIGS. 3 and 4 of the first embodiment.
  • the view shown in FIG. 3 can also serve as a cross-sectional view through the umbrella 20 in FIG. 5 , wherein cross-section is through chamber 22 and two channels 21 . 1 extending therefrom.
  • channels 21 . 1 instead of seven channels 21 . 1 , as shown in FIG. 5 , more channels or less channels, for example only two or three channels, may also be used.
  • the self-inflating umbrella of the present invention can be thrown away.
  • Environmentally friendly materials are therefore preferred.
  • the invention relates also to a self-inflating balloon in which the same principle is applied as in the umbrella described above, and in which all the other details and features can be applied as described above in connection with the self-inflating umbrella.
  • a simple toy balloon can be made, particularly in the form of a foil balloon made of a foil material, inside which there is a vacuum prior to use.
  • a container filled with an acid such as citric acid can be disposed inside such a balloon, and a solid such as a sodium (bi)carbonate granulate can be disposed outside it.
  • the container can be secured at a certain place inside the envelope, as described in the foregoing, and be suitably marked on the outside.
  • the container can also be freely movable inside the envelope.
  • the sodium (bi)carbonate granulate can likewise be fixed at a certain place on the inside of the envelope, as described in the foregoing, or alternatively can be disposed in a freely moveable manner inside the envelope. If the balloon is small enough, the granulate will be covered almost completely by the liquid in such a case also. By pressing the outer skin of the balloon at a suitable place, the container can be made to rupture such that the balloon is inflated by the gas formed by the chemical reaction.
  • the balloon may comprise two parts, in particular foils, which are welded to each other at their respective circumferential rims and form a closed envelope in such a way that the envelope is filled with the container and the granulate and a vacuum otherwise prevails inside.
  • the two foils are congruent with each other, i.e. they can be laid on top of each other in a perfect overlap.
  • the foils can also produce a figure such as an animal or the like.
  • the foils can also be circular in shape, so that the inflated balloon is shaped substantially like a ball or globe.
  • the balloon can also be used as an advertising medium by printing an advertising message on the outer surface of the envelope.

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  • Walking Sticks, Umbrellas, And Fans (AREA)
US12/224,570 2006-02-28 2007-02-26 Self-Inflating Screening Shield, in Particular Umbrella Abandoned US20090301532A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102006009262A DE102006009262B4 (de) 2006-02-28 2006-02-28 Selbstaufblasender Regenschirm
DE102006009262.7 2006-02-28
PCT/EP2007/001626 WO2007098902A1 (de) 2006-02-28 2007-02-26 Selbstaufblasender schirm insbesondere regenschirm

Publications (1)

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US20090301532A1 true US20090301532A1 (en) 2009-12-10

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US12/224,570 Abandoned US20090301532A1 (en) 2006-02-28 2007-02-26 Self-Inflating Screening Shield, in Particular Umbrella
US13/194,785 Abandoned US20120103378A1 (en) 2006-02-28 2011-07-29 Self-inflating screening shield, in particular umbrella

Family Applications After (1)

Application Number Title Priority Date Filing Date
US13/194,785 Abandoned US20120103378A1 (en) 2006-02-28 2011-07-29 Self-inflating screening shield, in particular umbrella

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US (2) US20090301532A1 (ru)
EP (1) EP1991081A1 (ru)
JP (1) JP2009528102A (ru)
CN (1) CN101420879A (ru)
AU (1) AU2007220721A1 (ru)
BR (1) BRPI0708342A2 (ru)
CA (1) CA2644436A1 (ru)
DE (1) DE102006009262B4 (ru)
RU (1) RU2008138573A (ru)
WO (1) WO2007098902A1 (ru)

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US20130152985A1 (en) * 2010-07-26 2013-06-20 Rolf Vaitl Inflatable umbrella

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DE102009018171B4 (de) 2009-04-17 2017-02-16 Edmund Philipp System und Verfahren zur ereignisauslösbaren Entfaltung und Versteifung textiler Körpergebilde
CN103027451B (zh) * 2011-10-10 2015-02-11 叶如康 一种充气伞
CN110179229A (zh) * 2019-06-06 2019-08-30 文彦华 一种卡片式一次性应急充气帽式雨伞
DE102020126611A1 (de) 2020-06-29 2021-12-30 Uwe Mettang Schwimmrettungsvorrichtung, Schwimmrettungskit und Aufblaseinrichtung für eine Schwimmrettungsvorrichtung
USD985798S1 (en) * 2021-03-15 2023-05-09 Mareekh Design Pty Ltd Inflatable habitat unit for permanent human settlement on mars

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130152985A1 (en) * 2010-07-26 2013-06-20 Rolf Vaitl Inflatable umbrella
AU2011328617B2 (en) * 2010-07-26 2016-02-04 Rb Holding Gmbh Inflatable umbrella
US9339092B2 (en) * 2010-07-26 2016-05-17 Rb Holding Gmbh Inflatable umbrella

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JP2009528102A (ja) 2009-08-06
WO2007098902A1 (de) 2007-09-07
AU2007220721A1 (en) 2007-09-07
US20120103378A1 (en) 2012-05-03
CN101420879A (zh) 2009-04-29
BRPI0708342A2 (pt) 2011-05-24
DE102006009262B4 (de) 2008-01-24
RU2008138573A (ru) 2010-04-10
DE102006009262A1 (de) 2007-09-06
EP1991081A1 (de) 2008-11-19
CA2644436A1 (en) 2007-09-07

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