Abstract: A method and a device for deflating an inflated wall (1), wherein the inflated wall (1) is cut by using at least one cutting member adapted to cut the inflated wall (1) along a cutting line with the effect of causing a deflation opening of the inflated wall (1). The invention applies in particular to the inflated envelope of an aerostat balloon.

Abstract: A method for oxygenating a fluid, the method including launching a sub-orbital lower-level apparatus to a predetermined altitude greater than 20,000 feet above sea level. The method also includes, at the predetermined altitude, actuating a fluid capture mechanism sealingly configured to collect and store an atmospheric fluid. In addition, returning the a sub-orbital lower-level apparatus to an altitude less than 20,000 feet, and introducing at least a portion of the atmospheric fluid to an oxygenation process to mix the captured atmospheric fluid with another fluid.

Abstract: An apparatus for sealing and illuminating a balloon includes a housing for sealing insertion into a neck of a balloon. A flow path within the housing conducts an inflation gas from an inlet to an outlet of the housing, and a flow control system disposed in the flow path allows the inflation gas to flow from the inlet to the outlet. The apparatus includes a light source mounted in conjunction with the housing and a power source disposed within the housing providing power for the light source. A switch mounted in conjunction with the housing is operable to selectively connect the power source to the light source by completing a circuit between the power source and the light source. The apparatus also includes a switch activating member annularly disposable around the housing to operate the switch.

Abstract: The high-altitude balloon has a skin made of nearly evacuated electrostatically inflated cells which provide thermal insulation to minimize heat loss from the gas in the balloon, while transmitting heat from the sun to heat the gas. The lower surface of the balloon is reflective to microwave or laser beams. A stable array of the balloons is maintained at a high altitude and is used to facilitate communications in a world-wide communications system. Ascent of the balloon is well controlled and weight is minimized by starting with lighter-than-air gases in liquid form, releasing a lifting gas into the craft, and then using the empty containers to store the remaining gas when the balloon is aloft.

Abstract: An energy generating device for lighter-than-air vehicles having a gas impervious outer flexible fabric including a flexible photovoltaic array located on the outer layer of the gas impervious fabric; a thermocouple array located between the photovoltaic cells and the gas impervious fabric; a thermally conductive layer or heat spreader between the thermocouple array and the photovoltaic array and between the thermocouple array and the gas impervious flexible fabric; an electrically conductive means connected to said thermocouple array for drawing electrical power away from said thermocouple array; and an electrical load, such as an electrical storage device or a device that consumes electricity, for drawing electricity from the thermocouple array.

Abstract: A balloon launch unit produces lift gas to enable balloon launch or to allow the prolongation of balloon flight. A method of using the balloon launch unit can include reforming a fuel source by reaction with water to generate hydrogen-rich lift gas mixtures, and injecting the lift gas into a balloon. A reforming operation can include causing the combustion of a combustible material with ambient oxygen for the release of energy; and heating a reforming combination of reaction fuel and water with the energy released from the combustion of the combustible material, to a temperature above that required for the reforming reaction wherein the fuel and water sources are reformed into lift gas. The amount of the combustible material combusted is sufficient to result in the release of enough energy to heat an amount of the reforming reaction fuel and water sources to the temperature above that required for the reforming reaction.

Abstract: A sub-orbital, high altitude communications system that has at least two ground stations and at least one high altitude relay station. Each of the ground stations includes apparatus for sending and receiving telecommunications signals. The relay stations include apparatus for receiving and sending telecommunications signals from and to the ground stations and from and to other relay stations. Apparatus is provided for controlling the lateral and vertical movement of the relay stations so that a predetermined altitude and location of each of the relay stations can be achieved and maintained. Apparatus is provided for retrieving relay stations so that they can be serviced for reuse.

Abstract: The present invention is an apparatus and system for providing surveillance of an area or a space. According to some embodiments of the present invention there may be provided a housing containing a deployable and inflatable surveillance balloon, which balloon may elevate and/or support a surveillance payload including one or more sensor assemblies. Data collected by the sensors may be transmitted to a user interface which may display the data to a user.

Abstract: Systems and methods are described for deterring birds from flying into airspace above airport runways. The system features at least one mortar for firing a pyrotechnic device to produce a light and sound display for the purpose of disturbing, frightening, and harassing birds so as to deter them from flying into airspace above and in the vicinity of an airport runway. The mortars of the system can be installed on a mounting platform capable of being securely connected to the ground or a ground surface substrate or to a vehicle. Fixed position, movable and portable embodiments of the system may be created and used. The light and sound display produced by the exploding pyrotechnic devices can be varied to prevent the birds from becoming desensitized to the sounds and visual effects of the system. The system may also include deterrent chemicals.

Abstract: An apparatus for removing harmful gas components out of the earth's atmosphere is a free-flying autonomous lightweight aircraft with an onboard gas processing system including gas separation or extraction devices, and inlets and outlets connected to the devices. Solar cells and/or thermoelectric generators provided on the craft produce electrical energy to operate the individual devices. The system may include a cryogenic closed-loop circulation system that participates in liquefying the extracted gas components. The apparatus is preferably a lighter-than-air craft like a dirigible. A method of extracting harmful gas components from the atmosphere involves flying the apparatus at a prescribed altitude level and operating the gas processing system to remove the harmful gas component from the atmosphere, then returning the apparatus to earth to offload the liquefied stored harmful gas component.

Abstract: The invention relates to a device for controlling the deployment of an inflatable structure including, in the non-deployed state, a flexible tube (12) which is folded in zigzags and fixed to one end of a plug (13) provided with a buoyant gas admission (15), the other end of the tube being closed; means (25 to 29) for controlling the change of state of the tube from the folded state (12a) to the deployed state (30), the means being arranged inside the tube (12) and consisting of a set of interconnected flexible blades (25) which are radially arranged around the strut (16) in the form of petals, in such a way that the set can be displayed along the strut; and means (28, 29) for bringing the set of petals (25) towards the plug (13) in such a way as to press the folded part (12a) of the tube, each petal (25) being applied to a series of superimposed folds (21 to 24) of the folded part of the tube.

Abstract: An apparatus for sealing and illuminating a balloon includes a housing for sealing insertion into a neck of a balloon. A flow path within the housing conducts an inflation gas from an inlet to an outlet of the housing, and a flow control system disposed in the flow path allows the inflation gas to flow from the inlet to the outlet. The apparatus includes a light source mounted in conjunction with the housing and a power source disposed within the housing providing power for the light source. A switch mounted in conjunction with the housing is operable to selectively connect the power source to the light source by completing a circuit between the power source and the light source. The apparatus also includes a switch activating member annularly disposable around the housing to operate the switch.

Abstract: A balloon launch unit produces lift gas to enable balloon launch or to allow the prolongation of balloon flight. A method of using the balloon launch unit includes reforming a fuel source by reaction with water to generate hydrogen-rich lift gas mixtures, and injecting the lift gas into a balloon. The reforming operation includes causing the combustion of a combustible material with ambient oxygen for the release of energy; and heating a reforming combination of reaction fuel and water with the energy released from the combustion of the combustible material, to a temperature above that required for the reforming reaction wherein the fuel and water sources are reformed into lift gas. The amount of the combustible material combusted is sufficient to result in the release of enough energy to heat an amount of the reforming reaction fuel and water sources to the temperature above that required for the reforming reaction.

Abstract: The subject of the invention is method and envelope structure for handling gas diffusion of airships and other balloons to significantly decrease, respectively fully eliminate envelope diffusion of gases through envelopes of airships and other balloons. During the method according to the invention the gases diffused through the envelope (8, 9) of airships and other balloons are collected into a separator space (2). These gases are separated from the mixture of this separator space by physical and/or chemical action and forwarded back to their sources. The invention is further an envelope structure for handling gas diffusion of airships and other balloons for applying methods according to the invention.

Abstract: A balloon-mounted light source includes an array of LEDs mounted on, and cooled by, a balloon structure filled with a lightweight gas such as helium. The LEDs are preferably mounted in long series arrangements with small gauge wire to minimize weight. They may be mounted on heatsinks that are dispersed in a mesh-like structure over the balloon. The LED circuitry may also be mounted on flexible circuit boards, which may be porous to reduce weight. The balloon may include an envelope compartment with a leak-resistant seal or zipper to allow the interior of the envelope to be accessed, and a pressure relief valve. The envelope of the balloon may be clear in the front in order to maximize the projection of light but reflective along the back and sides as to minimize spill. The balloon may take the form of a controllable dirigible.

Abstract: A system and method is described generally for affecting atmospheric change. The system and method include providing a high altitude conduit or track. The system and method also include providing a first material through the conduit or via a payload delivery system. Further, the system and method include expelling the first material into the atmosphere at high altitude.

Abstract: A pressure tight large-scaled membrane structure comprising a bag body having a plurality of gores attached to each other along an attachment line, and a plurality of first ropes attached over a predetermined range of the bag body in such a manner as to be orthogonal to the attachment line of the gores, whereby a cylindrical shaped portion is formed. The cylindrical shaped portion has a substantially circular cross-sectional area that is a maximum substantially circular cross-section of the bag body and the plurality of first ropes each having approximately the same length as a circumference of the substantially circular-cross section having a maximum area with respect to the bag body.

Abstract: An automated balloonsonde launcher and a method for an automated balloonsonde launch are disclosed. The automated balloonsonde launcher, for example, may comprise a collapsible protective cover forming an inner region for receiving a balloon, a gas inlet for receiving a gas, a gas outlet for mating with a balloon, a valve operable between the gas inlet and the gas outlet for inflating a balloon within the inner region of the protective cover. The launcher further comprises a controller that controls the valve to inflate a balloon within the protective cover, opens an opening in the protective cover and releases a balloon through the opening of the protective cover.

Abstract: A system is disclosed whereby a sensor, communication device, or other payload may be lofted to an operational altitude and maintained over an area of interest for some time by a relatively inexpensive and disposable buoyant aircraft, then returned intact to its point of origin or another desired location by a reusable but also relatively inexpensive non-buoyant aircraft. Automatic unpiloted control is used for all stages of flight, including ascent, loiter, return, and landing Specialized equipment can be provided to simplify launch procedures, reducing the number of personnel required to operate the system.

Abstract: An apparatus for sealing and illuminating a balloon includes a housing for sealing insertion into a neck of a balloon. A flow path within the housing conducts an inflation gas from an inlet to an outlet of the housing, and a flow control system disposed in the flow path allows the inflation gas to flow from the inlet to the outlet. The apparatus includes a light source mounted in conjunction with the housing and a power source disposed within the housing providing power for the light source. A switch mounted in conjunction with the housing is operable to selectively connect the power source to the light source by completing a circuit between the power source and the light source. The apparatus also includes a switch activating member annularly disposable around the housing to operate the switch.

Abstract: A lighter than air blimp which has either an aerodynamically shaped or a round envelope of flexible sheet material, and a plurality of stabilizing fins mounted in a circumferentially spaced apart arrangement about the tail end portion of the envelope. The tail fins are collapsible, to faciliate storage and transport to the point of use, and to also facilitate the rapid assembly and deployment of the blimp at the point of use, particularly under windy conditions. The tail fins are attached while the envelope is deflated and with the fins in a collapsed position, and after the envelope is inflated, the fins can be moved to snap upwardly to an operative position.

Abstract: The high-altitude balloon has a skin made of nearly evacuated electrostatically inflated cells which provide thermal insulation to minimize heat loss from the gas in the balloon, while transmitting heat from the sun to heat the gas. The lower surface of the balloon is reflective to microwave or laser beams. A stable array of the balloons is maintained at a high altitude and is used to facilitate communications in a world-wide communications system. Ascent of the balloon is well controlled and weight is minimized by starting with lighter-than-air gases in liquid form, releasing a lifting gas into the craft, and then using the empty containers to store the remaining gas when the balloon is aloft.

Abstract: An apparatus for sealing and illuminating a balloon includes a housing for sealing insertion into a neck of a balloon. A flow path within the housing conducts an inflation gas from an inlet to an outlet of the housing, and a flow control system disposed in the flow path allows the inflation gas to flow from the inlet to the outlet. The apparatus includes a light source mounted in conjunction with the housing and a power source disposed within the housing providing power for the light source. A switch mounted in conjunction with the housing is operable to selectively connect the power source to the light source by completing a circuit between the power source and the light source. The apparatus also includes a switch activating member annularly disposable around the housing to operate the switch.

Abstract: For an inflatable structure having a flexible outer shell or wall structure having a flexible restraint layer comprising interwoven, load-bearing straps, apparatus for integrating one or more substantially rigid members into the flexible shell. For each rigid member, a corresponding opening is formed through the flexible shell for receiving the rigid member. A plurality of connection devices are mounted on the rigid member for receiving respective ones of the load-bearing straps.

Abstract: A device for deploying an aerostat includes a cylindrical shaped container having an open end and a closed end and a center tube axially oriented in the container. A tapered disc is mounted for axial movement on the center tube, and it has a taper of increasing diameter in an axial direction from the closed end toward the open end of the container. In its operation, the tapered disc is held in a first position while a portion of the aerostat is loaded into the container. It is then moved to a second position wherein the tapered disc holds the loaded portion of the aerostat in the container. Thereafter, the disc is moved to a release position wherein the disc directs deployment of the aerostat from the container.

Abstract: An apparatus for sealing and illuminating a balloon includes a housing for sealing insertion into a neck of a balloon. A flow path within the housing conducts an inflation gas from an inlet to an outlet of the housing, and a flow control system disposed in the flow path allows the inflation gas to flow from the inlet to the outlet. The apparatus includes a light source mounted in conjunction with the housing and a power source disposed within the housing providing power for the light source. A switch mounted in conjunction with the housing is operable to selectively connect the power source to the light source by completing a circuit between the power source and the light source. The apparatus also includes a switch activating member annularly disposable around the housing to operate the switch.

Abstract: A dehumidification system for removing water vapor from the within the envelope of an airship comprises a pressurizer valve, a blower and a dehumidifier attached to the airship. The pressurizer valve releases air from the envelope and directs the air to the blower. The blower forces the air through the dehumidifier where the air is dried to a desired dew point. The dried air is then forced back into the envelope of the airship, thus reducing the weight of the airship and reducing the amount of condensate that may form during an ascent.

Abstract: An airborne device such as a model rocket or balloon is provided with a light source and/or a sound source that makes the rocket visible during ascent, descent and recovery at night. The sound source is provided to assist in day time recovery. The light source may be located in a transparent or translucent nose cone section of a rocket or otherwise attached adjacent or in a balloon to assist in operation and viewing. The light source may include a timing or flashing feature to make the airborne device or rocket more visibly distinct during flight and recovery. Additional signaling and informational light sources may be added to other parts of the rocket and to the ground mounted launch apparatus to announce launching and/or improve the night time viewing. One form of the rocket system uses a count down feature with lights on the launch structure to signal when blast off will occur.

Abstract: The high-altitude balloon has a skin made of nearly evacuated electrostatically inflated cells which provide thermal insulation to minimize heat loss from the gas in the balloon, while transmitting heat from the sun to heat the gas. The lower surface of the balloon is reflective to microwave or laser beams. A stable array of the balloons is maintained at a high altitude and is used to facilitate communications in a world-wide communications system. Ascent of the balloon is well controlled and weight is minimized by starting with lighter-than-air gases in liquid form, releasing a lifting gas into the craft, and then using the empty containers to store the remaining gas when the balloon is aloft.

Abstract: The invention concerns an assembly comprising a flying balloon (100) and a tower (200). The balloon is captive and mobile in the tower. The captive balloon can ascend and descend along the tower with a limited wind intake or counterbalanced by the retention forces exerted by the tower, and can be flown up regardless of weather conditions without requiring a considerable and cumbersome stabilizing device. Such a balloon may be used as advertising sign and/or as an attraction.

Abstract: Innovative new methods in connection with lighter-than-air (LTA) free floating platforms, of facilitating legal transmitter operation, platform flight termination when appropriate, environmentally acceptable landing, and recovery of these devices are provided. The new systems and methods relate to rise rate control, geo-location from a LTA platform including landed payload and ground-based vehicle locations, and steerable recovery systems.

Abstract: A laminate material for lighter-than-air vehicles includes a liquid crystal polymer fiber layer, a polyimide layer secured to the liquid crystal polymer fiber layer; and a polyvinylidene fluoride (PVDF) layer secured to the polyimide layer. The layers are secured to one another with a polyurethane adhesive. Adjacent laminates may be secured to one another by a PVDF cover tape on the exterior surfaces and a structural tape on the interior surfaces. The structural tape includes a liquid crystal polymer fiber layer and a polyimide layer to ensure the integrity of the vehicle. An alternative material may include a liquid crystal polymer fiber layer and a polyvinylidene fluoride (PVDF) layer disposed on both sides of the liquid crystal polymer fiber layer.

Abstract: A miniature surveillance balloon system is described that can be used in military and public safety situations for real-time observations. They are as small as feasibly possible, low-cost and expendable, and typically are deployed in clusters. Balloons may act individually or alternately clusters may act robotically (in unison) without command input at times. Video surveillance information is preprocessed and then sent via wireless communications links. Batteries and/or gas cylinders may be selectively jettisoned to facilitate vertical movement. Balloons may optionally have thruster mechanisms to facilitate lateral movement which may in some embodiments be powered by a source of combustible gas which is also used for providing lift.

Abstract: Methods and apparatus are described for producing lift gas to enable balloon launch or to allow the prolongation of balloon flight. In one example, the method may include reforming a fuel source by reaction with water to generate hydrogen-rich lift gas mixtures, and injecting the lift gas into a balloon. The reforming operation may include causing the combustion of a combustible material with ambient oxygen for the release of energy; and heating a reforming combination of reaction fuel and water with the energy released from the combustion of the combustible material, to a temperature above that required for the reforming reaction wherein the fuel and water sources are reformed into lift gas. In one example, the amount of the combustible material combusted is sufficient to result in the release of enough energy to heat an amount of the reforming reaction fuel and water sources to the temperature above that required for the reforming reaction to proceed.

Abstract: A lighter than air blimp which has either an aerodynamically shaped or a round envelope of flexible sheet material, and a plurality of stabilizing fins mounted in a circumferentially spaced apart arrangement about the tail end portion of the envelope. The tail fins are collapsible, to faciliate storage and transport to the point of use, and to also facilitate the rapid assembly and deployment of the blimp at the point of use, particularly under windy conditions. Also, the configuration of the fins may be adjusted during flight by a control system which permits adjustment of the orientation of the blimp with respect to the wind direction.

Abstract: An automated balloonsonde launcher and a method for an automated balloonsonde launch are disclosed. The automated balloonsonde launcher, for example, may comprise a collapsible protective cover forming an inner region for receiving a balloon, a gas inlet for receiving a gas, a gas outlet for mating with a balloon, a valve operable between the gas inlet and the gas outlet for inflating a balloon within the inner region of the protective cover. The launcher further comprises a controller that controls the valve to inflate a balloon within the protective cover, opens an opening in the protective cover and releases a balloon through the opening of the protective cover.

Abstract: The video airship is a lighter-than-air airship, preferably spherical, including a video display disposed with substantially all of the craft's outer surface, a nearly invisible computerized electric propulsion-control system, speakers, microphones, video cameras, communications systems, and extendible landing gear. A power generation system contained within the airship's interior supplies the energy for it's display, propulsion, flight control and other onboard devices.

Abstract: Device for evacuating persons, for example from a multi-storey building on fire, from an evacuating location to a secure location, comprising: a balloon provided to be filled with a gas lighter than air for moving the balloon between the secure location and the evacuating location; guide means connected to the balloon for guiding the balloon between the secure location and the evacuating location; and transport means connected to the balloon for transporting persons from the evacuating location to the secure location; wherein the device further comprises a cable provided to be connected between the secure location and the evacuating location and that the balloon is provided to be movably mounted on the cable between the secure location and the evacuating location.

Abstract: A method comprises: launching observation means configured to observe upper air environment immediately before launching an airship to acquire ambient air data on the actual conditions of the upper ambient air including altitude, pressure, wind direction, wind speed and temperature; determining an ascension profile for the airship by simulation using the ambient air data on the actual conditions of the ambient air; determining an initial quantity of Helium gas conforming to the actual conditions of the ambient air; and adjusting the quantity of Helium gas in the Helium room to the initial quantity of Helium gas to set an initial buoyancy. The method sets hull parameters for the hull of the airship to provide an ascension profile conforming to the actual conditions of the ambient air.

Abstract: A variable-lift device using a helium to fly. The device comprises a balloon (1) composed of an outer flexible envelope (3) supported by a rigid structure. The rigid structure comprises a plurality of hollow toruses (4) of inside volume that acts as a tank for storing helium under pressure.

Abstract: A plurality of bulkheads (23a to 23d) are installed in a hull (21) so as to divide the interior space of the hull (21) into a plurality of compartments (&Dgr;S1 to &Dgr;S5) successively arranged along the axis (22) of the hull (21). The compartments (&Dgr;S1 to &Dgr;S5) are divided into upper flotation gas containing spaces (25a to 25e) and lower air containing spaces (26a to 26e) by flexible diaphragms (24a to 24e) impermeable to air and a flotation gas, respectively. The bulkheads (23a to 23d) have upper parts A1a, A1b, A1c and A1d formed of a meshed sheet, extending upward from joints (27a to 27d) of the diaphragms (24a to 24e) and the bulkheads (23a to 23d), exposed to the flotation gas containing spaces (25a to 25e). The upper parts are provided with a plurality of vents through which the flotation gas is allowed to flow.

Abstract: A lighter-than-air device comprises a buoyant element containing lighter-than-air gas, and a flexible surface having a length and height forming a usable area. The flexible surface has a bottom edge that is not connected to the buoyant element. The length of the flexible surface is connected directly to the buoyant element. The flexible surface is operable to use an area defined by the buoyant element and the bottom edge of the flexible surface to, among other things, condense water, move a vessel, and block material from entering an area.

Abstract: A pressure-resistant balloon includes a gasbag and a volume changing mechanism which deforms the gasbag in a fully inflated state to change a volume of the gasbag. The gasbag includes spindle-shaped gores of an airtight film material, adjacent gores joined together at side edges, and load tapes fitted to joined sections of the side edges, and extending along the side edges, respectively. After inflated, the gasbag allows no gas to be discharged so as to maintain an internal gas pressure. Each of the gores outwardly protrudes between two adjacent load tapes without an elongation of the airtight film material of the gore, when the gasbag is in the fully inflated state. The protruding gore has a radius of curvature in a direction intersecting with the two adjacent load tapes. The radius of curvature is smaller than a radius of the gasbag.

Abstract: A meteorological balloon having improved wind measurement during an ascent stage, includes an inflatable envelope having, during ascent, an upper hemisphere and a lower hemisphere, and presenting an outer surface, a GPS type sonde secured to the inflatable envelope, and a device for improving wind measurement which is a single spoiler secured to the upper hemisphere portion envelope. The spoiler is constructed and arranged to transmit any aerodynamic force acting thereon to the balloon and to modify air streams following the outside surface of the balloon so as to prevent the air streams from adhering to the outer surface of the bottom hemisphere of the balloon during ascent.

Abstract: A balloon comprising an envelope, wherein the envelope has a multilayered structure comprising a gas-impervious sheet, and a liquid absorbent sheet overlaid on the inner surface of the gas-impervious sheet.

Abstract: A lighter-than-air device comprises a buoyant element containing lighter-than-air gas, and a flexible surface having a length and height forming a usable area. The flexible surface has a bottom edge that is not connected to the buoyant element. The length of the flexible surface is connected directly to the buoyant element. The flexible surface is operable to use an area defined by the buoyant element and the bottom edge of the flexible surface to, among other things, condense water, move a vessel, and block material from entering an area.

Abstract: A pressure-resistant balloon includes a gasbag and a volume changing mechanism which deforms the gasbag in a fully inflated state to change a volume of the gasbag. The gasbag includes spindle-shaped gores of an airtight film material, adjacent gores joined together at side edges, and load tapes fitted to joined sections of the side edges, and extending along the side edges, respectively. After inflated, the gasbag allows no gas to be discharged so as to maintain an internal gas pressure. Each of the gores outwardly protrudes between two adjacent load tapes without an elongation of the airtight film material of the gore, when the gasbag is in the fully inflated state. The protruding gore has a radius of curvature in a direction intersecting with the two adjacent load tapes. The radius of curvature is smaller than a radius of the gasbag.

Abstract: The present invention is an apparatus to counter normal gravitational force in order to provide a personnel lifting device. The personnel lifting device is a lighter-than-air gas-filled balloon having a harness to suspend a user therefrom. The balloon further includes a weighted tether to automatically control the height of any ascent and the speed of any descent—wherein the balloon may be used as a component of an amusement.

Abstract: A non-latex balloon 10 having a double balloon structure, having an outer balloon made of a pair of films 21, 22 for the outer balloon of which the peripheral edges 23 are heat-sealed; and an inner balloon disposed in the outer balloon, likewise made of a pair of films for the inner balloon of which the peripheral edges are heat-sealed. A first check valve 40 to fill a gas into the outer balloon 20, is integrally bonded to the outer balloon by heat-sealing of the films 21, 22 for the outer balloon; and a second check valve 50 to fill a gas into the inner balloon 30 is inserted and disposed between the films of the outer balloon 20 and between the films of the inner balloon 30, and integrally bonded to respective balloons by heat-sealing of the films. On the inner sides of the respective check valves 40, 50, non-heat sealing portions 44, 54, 55 are provided to secure gas permeation.

Abstract: A sun shield uses a canopy that has a plurality of first openings located around its outer periphery and a second centrally located opening. A plurality of first balloons are tethered to the first openings while a second balloon is tethered to a plurality of third openings located about the second opening. Tethers are connected between the first openings and anchors secured to the ground. Clips can be used to secure two canopies together.