WO2003068598A1 - Pressure equalizer device with ballistic resistance - Google Patents

Pressure equalizer device with ballistic resistance Download PDF

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Publication number
WO2003068598A1
WO2003068598A1 PCT/BR2003/000020 BR0300020W WO03068598A1 WO 2003068598 A1 WO2003068598 A1 WO 2003068598A1 BR 0300020 W BR0300020 W BR 0300020W WO 03068598 A1 WO03068598 A1 WO 03068598A1
Authority
WO
WIPO (PCT)
Prior art keywords
ballistic resistance
fact
equalizer device
pressure equalizer
resistance according
Prior art date
Application number
PCT/BR2003/000020
Other languages
French (fr)
Inventor
André Nestor ESCOBAR BERTIN
Eduardo Rodrigues Da Silva
Original Assignee
Baa Aircraft Armoring Ltda
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Baa Aircraft Armoring Ltda filed Critical Baa Aircraft Armoring Ltda
Priority to AU2003212124A priority Critical patent/AU2003212124A1/en
Publication of WO2003068598A1 publication Critical patent/WO2003068598A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C1/00—Fuselages; Constructional features common to fuselages, wings, stabilising surfaces or the like
    • B64C1/14—Windows; Doors; Hatch covers or access panels; Surrounding frame structures; Canopies; Windscreens accessories therefor, e.g. pressure sensors, water deflectors, hinges, seals, handles, latches, windscreen wipers
    • B64C1/1407—Doors; surrounding frames
    • B64C1/1469—Doors between cockpit and cabin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
    • B64D45/00—Aircraft indicators or protectors not otherwise provided for
    • B64D45/0015—Devices specially adapted for the protection against criminal attack, e.g. anti-hijacking systems
    • B64D45/0021—Devices specially adapted for the protection against criminal attack, e.g. anti-hijacking systems means for restricting access to flight deck
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C1/00—Fuselages; Constructional features common to fuselages, wings, stabilising surfaces or the like
    • B64C2001/009—Fuselages; Constructional features common to fuselages, wings, stabilising surfaces or the like comprising decompression panels or valves for pressure equalisation in fuselages or floors

Definitions

  • the present invention relates to a pressure equalizer device with ballistic resistance, particularly for aircraft command cabins. Background of the invention
  • the invention refers to a pressure equalizer device with ballistic resistance characterized by the fact that it comprises a grating and a flexible bag.
  • the grating works as a physical shield, aiming to prevent the access of people or things into the environment where the user of the device is, manufactured with impact resistant material and fixed to where protection is wanted.
  • the flexible bag comprises overlapping layers of a technical fiber web, which are bonded among themselves by means of interlaced sealing lines, the bag being folded so as to have a reduced size; said folded flexible bag being fixed to said grating such that one of the sides of the bag - where the folds are - is free and endowed with at least one aperture so it can be unfolded returning to its original open size, allowing air through its aperture when there is a pressure variation between the environment of the user of the device and the adjacent environment, thus allowing the pressure to equilize between the two environments.
  • the bag is made of ballistic material, it protects the user of the device from eventual firearm attacks.
  • Figure 1 represents a perspective view of the grating (1) seen from the cabin of passengers;
  • Figure 1A represents exploded perspective view of the grating and its frame;
  • Figure 2 represents a perspective view of the flexible bag (2) seen from the command cabin;
  • Figure 2A represents exploded perspective of the flexible bag, frame and protective cover
  • Figure 2B represents a perspective view of the unfolded flexible bag
  • Figure 3 represents a perspective view of the optional quick fit socket of the pressure equaliser divice
  • Figure 4 represents a perspective view of the flexible bags optionally located on the divisional wall and on the door of the command cabin;
  • FIG. 5 represents a perspective view of the expanded flexible bags seen from the command cabin.
  • the following example refers to a particular embodiment of the invention, which is a pressure equalizer device with ballistic resistance for an aircraft command cabin characterized by the fact that it comprises a grating
  • a protective cover (3) for the flexible bag can also be used
  • the pressure equalizer device with ballistic resistance comprises a flexible bag (2, figure 2) that is composed of overlapping layers of a synthetic fibre material, bonded among themselves by means of criss-crossed sealing lines in order to keep its flexibility.
  • said flexible bag has stitchproof hems in order to keep the physical integrity, that is, it comprises finishing in the edges and/or junctions of the synthetic fabric layers with overlock sewing or another resistant sewing and/or glue.
  • the flexible bag is folded in order to have a sufficiently reduced dimension before being activated (figure 2A), with lateral (a,c) and superior (b) extremities fixed in a frame (21), which by its turn is fixed to the door of the command cabin (figure 2).
  • said frame (21) is metallic.
  • the flexible bag (2) can be provided with a protective cover(3), with the property of bursting when submitted to a difference of pressure that can cause structural deformations to the aircraft, said protective cover (3) may be fixed to frame (21), for example with a hook and loop (for instance brand Velcro) fastener.
  • FIG 2B the flexible bag is shown in an unfolded configuration, so that the inferior opening allows the circulation of air at the moment of the equalizing of pressure.
  • the flexible bag (2) may be removed from inside the command cabin, allowing the exit of the crew members and pilots through the existing aperture before it was fixed, for example in an emergency situation.
  • a fitting between the frame (11) of the grating and the flexible bag frame (21) is configured as shown in figure 3 described further on.
  • the protective cover (3) bursts open due to the pressure difference between this cabin and the passengers cabin, the flexible bag (2) opens allowing the pressures of the cabins to balance, assuring the safety of the flight.
  • the flexible bag (2) is, made of ballistic resistant material, it offers the pilots protection against firearms, and when depressurization of the command cabin occurs, its opening is offset from a possible line of shoting (in figure 2B it may be seen that the opening is turned downwards).
  • synthetic fiber material is the one with ballistic (bullet- resistant) use, preferably chosen from the group consisting of aromatic poliaramid fiber, aramid fiber, fiberglass, ceramic fiber, and/or mixtures thereof, optionally in presence of other materials like polyethylene fibers, nylon fibers or films, elastomers, metallic filaments as steel or titanium, etc.. More particularly one uses an aromatic poliaramid fiber web of brands like Kevlar, Twaron and Zylon, manufactured respectively by the companies DuPont, Teijin and Toyobo.
  • the sealing between the layers of synthetic fiber web is obtained by means of sewing, sealing and/or gluing, preferably by sewing with threads of aromatic poliaramid fiber.
  • the sealing lines must be preferably interlaced, for example with straight lines, that form between themselves quadrilateral forms as losanges and squares, or with sinuous lines, or in zigzag, or with any configuration that allows interlacement.
  • the interlacement is achieved by means of regular losanges.
  • the grating (1) is comprised of wires and/or bars interlaced to form a screen capable of resisting high tensions, fixed to a frame (11).
  • the grating (1) and the frame (11) are made of metal.
  • the grating (1) aims at preventing the access of unauthorized people through the escapeway, or the insertion of any weapons, explosive or other elements that might endanger the safety of the crew members in the aircraft command cabin.
  • the fixation of the frames (11, 21) to the command cabin door is obtained, in a preferential way, by means of at least one headed bolt (4), fixed in the frame (11).
  • the openings (5) in the door and (6B) in the frame (21) allow the passage of the bolt heads (4), and the cutout (6A) of the frame (21) allows the setting of the frames (11 and 21) by means of its quick fit, so that its withdrawl is possible only from the command cabin side.
  • there are no openings (5) in the door since the clearance where the grating (1) fits to the flexible bag (2) is large enough for the passage of the bolts (4).
  • the location of the pressure equalizer device with ballistic resistance inside the aircraft can be on doors or on dividing walls as desired. More than one device can be sued between the command and passenger cabins, as depicted in figures 4 and 5.

Landscapes

  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Thermistors And Varistors (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)

Abstract

The present invention refers to a pressure equalizer device with ballistic resistance characterized by the fact of comprising a grating (1) adjacent to a flexible bag (2), this set being aable to protect the pilots and crew, and in case of depressurization keeping the aircraft pressure equalized, preventing structural deformations that might compromise flight safety.

Description

PRESSURE EQUALIZER DEVICE WITH BALLISTIC RESISTANCE Field of the invention
The present invention relates to a pressure equalizer device with ballistic resistance, particularly for aircraft command cabins. Background of the invention
The text that follows, for simplicity, refers to a particular embodiment of the invention, namely aircraft command cabins, without restricting in any way the scope of the invention only to this embodiment .
Many a safety equipment was projected to prevent or to make difficult the action of aircraft kidnappers. After the attack to the Twin Towers of the
WTC in 2001 this work has been intensified, and the search for safety measures and new technologies to ensure them have been proposed to guarantee the aerial safety.
Amongst these measures there were adopted luggage inspection, control and inspection of hand luggage, reinforcement of the airport safety, video cameras inside the airplanes, beeper buttons to be pressed in case of kidnapping or emergency to alert the authorities on the ground, and installation of armored doors to protect the cabin of the pilot.
The shielding of vehicles, walls, vests and windows is known in the state of art. The following documents of patents can be cited as representative: EP1172512, DE3536102, EP0277592 that concern the protection of doors, EP0191190 for the protection of door and window,
US3704845 for the protection of airplane door, US4992881 for the protection of instrument panel, US6280826 for the protection of vehicle windows and CN23710590, US5811719, US5438908, US5413026 and US5370035 of vehicles. One verifies that, distinctly from the present invention, such documents disclose the application of of blankets or panels that resist to the impact of weapons, fixedly stretched and sealed to the surface to protect, like a panel adjusted to the protected object. Summary of the invention
It is an object of the present invention to provide a pressure equalizer device with ballistic resistance, particularly for aircraft command cabins protecting the pilots against gunfire or attacks and , in the event of depressurization of the command cabin, allowing the pressure to be equalized in the aircraft, thus preventing structural deformations that can compromise flight safety.
The invention refers to a pressure equalizer device with ballistic resistance characterized by the fact that it comprises a grating and a flexible bag. The grating works as a physical shield, aiming to prevent the access of people or things into the environment where the user of the device is, manufactured with impact resistant material and fixed to where protection is wanted. The flexible bag comprises overlapping layers of a technical fiber web, which are bonded among themselves by means of interlaced sealing lines, the bag being folded so as to have a reduced size; said folded flexible bag being fixed to said grating such that one of the sides of the bag - where the folds are - is free and endowed with at least one aperture so it can be unfolded returning to its original open size, allowing air through its aperture when there is a pressure variation between the environment of the user of the device and the adjacent environment, thus allowing the pressure to equilize between the two environments. As the bag is made of ballistic material, it protects the user of the device from eventual firearm attacks.
The following are schematical figures of an adequate embodiment of the invention, whose dimensions and ratios do not necessarily correspond to the reality, as they are only intended to didactically present the many aspects of the invention, whose breadth of protection is only limited by the scope of the attached claims. Brief description of the drawing The invention will now be described on the basis of the appended schematic drawings in attached, in which:
Figure 1 represents a perspective view of the grating (1) seen from the cabin of passengers; Figure 1A represents exploded perspective view of the grating and its frame; Figure 2 represents a perspective view of the flexible bag (2) seen from the command cabin;
Figure 2A represents exploded perspective of the flexible bag, frame and protective cover; Figure 2B represents a perspective view of the unfolded flexible bag; Figure 3 represents a perspective view of the optional quick fit socket of the pressure equaliser divice;
Figure 4 represents a perspective view of the flexible bags optionally located on the divisional wall and on the door of the command cabin;
Figure 5 represents a perspective view of the expanded flexible bags seen from the command cabin. Description of the Drawings
The following example refers to a particular embodiment of the invention, which is a pressure equalizer device with ballistic resistance for an aircraft command cabin characterized by the fact that it comprises a grating
(1) adjacent to a flexible bag (2) with ballistic resistance, both located between two environments, the flexible bag (2) being capable of unfolding in case a substantial difference of pressure between the two environments occurs. Optionally, a protective cover (3) for the flexible bag can also be used
(2) (figure 2A).
The pressure equalizer device with ballistic resistance comprises a flexible bag (2, figure 2) that is composed of overlapping layers of a synthetic fibre material, bonded among themselves by means of criss-crossed sealing lines in order to keep its flexibility. In an advantageous manner said flexible bag has stitchproof hems in order to keep the physical integrity, that is, it comprises finishing in the edges and/or junctions of the synthetic fabric layers with overlock sewing or another resistant sewing and/or glue. The flexible bag is folded in order to have a sufficiently reduced dimension before being activated (figure 2A), with lateral (a,c) and superior (b) extremities fixed in a frame (21), which by its turn is fixed to the door of the command cabin (figure 2). In a particular manner said frame (21) is metallic. Optionally, the flexible bag (2) can be provided with a protective cover(3), with the property of bursting when submitted to a difference of pressure that can cause structural deformations to the aircraft, said protective cover (3) may be fixed to frame (21), for example with a hook and loop (for instance brand Velcro) fastener. In figure 2B, the flexible bag is shown in an unfolded configuration, so that the inferior opening allows the circulation of air at the moment of the equalizing of pressure.
In a particular situation of the invention, the flexible bag (2) may be removed from inside the command cabin, allowing the exit of the crew members and pilots through the existing aperture before it was fixed, for example in an emergency situation. To that end a fitting between the frame (11) of the grating and the flexible bag frame (21) is configured as shown in figure 3 described further on.
In case of depressurization of the command cabin, the protective cover (3) bursts open due to the pressure difference between this cabin and the passengers cabin, the flexible bag (2) opens allowing the pressures of the cabins to balance, assuring the safety of the flight.
As the flexible bag (2) is, made of ballistic resistant material, it offers the pilots protection against firearms, and when depressurization of the command cabin occurs, its opening is offset from a possible line of shoting (in figure 2B it may be seen that the opening is turned downwards).
As used here synthetic fiber material is the one with ballistic (bullet- resistant) use, preferably chosen from the group consisting of aromatic poliaramid fiber, aramid fiber, fiberglass, ceramic fiber, and/or mixtures thereof, optionally in presence of other materials like polyethylene fibers, nylon fibers or films, elastomers, metallic filaments as steel or titanium, etc.. More particularly one uses an aromatic poliaramid fiber web of brands like Kevlar, Twaron and Zylon, manufactured respectively by the companies DuPont, Teijin and Toyobo.
The sealing between the layers of synthetic fiber web is obtained by means of sewing, sealing and/or gluing, preferably by sewing with threads of aromatic poliaramid fiber. The sealing lines must be preferably interlaced, for example with straight lines, that form between themselves quadrilateral forms as losanges and squares, or with sinuous lines, or in zigzag, or with any configuration that allows interlacement. Preferably the interlacement is achieved by means of regular losanges.
The grating (1) is comprised of wires and/or bars interlaced to form a screen capable of resisting high tensions, fixed to a frame (11). Preferably the grating (1) and the frame (11) are made of metal. The grating (1) aims at preventing the access of unauthorized people through the escapeway, or the insertion of any weapons, explosive or other elements that might endanger the safety of the crew members in the aircraft command cabin. According to figure 3, the fixation of the frames (11, 21) to the command cabin door is obtained, in a preferential way, by means of at least one headed bolt (4), fixed in the frame (11). The openings (5) in the door and (6B) in the frame (21) allow the passage of the bolt heads (4), and the cutout (6A) of the frame (21) allows the setting of the frames (11 and 21) by means of its quick fit, so that its withdrawl is possible only from the command cabin side. In an alternative, there are no openings (5) in the door, since the clearance where the grating (1) fits to the flexible bag (2) is large enough for the passage of the bolts (4). The location of the pressure equalizer device with ballistic resistance inside the aircraft can be on doors or on dividing walls as desired. More than one device can be sued between the command and passenger cabins, as depicted in figures 4 and 5.
The person skilled in the art will readily perceive, from the description and the drawings, different ways to carry out the invention. However such possibilities are covered by the appended claims.

Claims

1 - PRESSURE EQUALIZER DEVICE WITH BALLISTIC RESISTANCE characterized by the fact that it comprises a grating (1) adjacent to a flexible bag (2) with ballistic resistance, both located between two environments, the flexible bag (2) being capable of unfolding in case a substantial difference of pressure between the two environments occurs.
2 - PRESSURE EQUALIZER DEVICE WITH BALLISTIC RESISTANCE according to claim 1 characterized by the fact that the said flexible bag (2) is manufactured with overlapping layers of a synthetic fiber web, which are bonded among themselves by means of interlaced lines of sealing, the bag being folded so as to have a reduced size and fixed to said grating (1) such that one of the sides of the said flexible bag - where the folds are - is free and provided with at least one aperture.
3 - PRESSURE EQUALIZER DEVICE WITH BALLISTIC RESISTANCE according to claim 2 characterized by the fact that said synthetic fiber material is chosen from the group comprising aromatic poliaramid fiber, aramid fiber, fiberglass, ceramic fiber and/or mixtures thereof..
4 - PRESSURE EQUALIZER DEVICE WITH BALLISTIC RESISTANCE according to claim 3 characterized by the fact that the said synthetic fiber material is made with an aromatic poliaramid fiber.
5 PRESSURE EQUALIZER DEVICE WITH BALLISTIC RESISTANCE according to claim 1 characterized by the fact that the flexible bag is provided with a protective cover (3) that has the property of bursting open when submitted to pressure differences that can cause structural deformations to the aircraft.
6 - PRESSURE EQUALIZER DEVICE WITH BALLISTIC RESISTANCE according to claim 5 characterized by the fact that the said protective cover (3) has its edges fixed to the frame (21) with a hook and loop fastener.
7 - PRESSURE EQUALIZER DEVICE WITH BALLISTIC RESISTANCE according to claim 6 characterized by the fact that the frame (21) is metallic.
8 - PRESSURE EQUALIZER DEVICE WITH BALLISTIC RESISTANCE according to claim 1 characterized by the fact that the grating (1) is comprised of interlaced wires and/or bars forming a screen, said screen capable of resisting high strain, and said screen is fixed in a frame (11). 9 - PRESSURE EQUALIZER DEVICE WITH BALLISTIC RESISTANCE according to claim 8 characterized by the fact that the frame (11) and the grating (1) are metallic. 10 - PRESSURE EQUALIZER DEVICE WITH BALLISTIC RESISTANCE according to claim 1 characterized by the fact that the fixation between the grating (1) and the flexible bag (2) is a quick fit fitting (figure 3).
11 - PRESSURE EQUALIZER DEVICE WITH BALLISTIC RESISTANCE according to claim 10 characterized by the fact that the frame (11) comprises at least one headed bolt (4), whose head crosses the frame opening (6B), and lodges itself in the opening (6A).
12 - PRESSURE EQUALIZER DEVICE WITH BALLISTIC RESISTANCE according to claim 11 characterized by the fact that the frame (11) comprises at least one headed bolt (4), whose head crosses the door openings (5) and the frame opening (6B) of frame (21), and lodges itself in the opening (6A).
PCT/BR2003/000020 2002-02-18 2003-02-17 Pressure equalizer device with ballistic resistance WO2003068598A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003212124A AU2003212124A1 (en) 2002-02-18 2003-02-17 Pressure equalizer device with ballistic resistance

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BRPI0200429-1A BR0200429B1 (en) 2002-02-18 2002-02-18 pressure equalizing device with ballistic resistance.
BRPI0200429-1 2002-02-18

Publications (1)

Publication Number Publication Date
WO2003068598A1 true WO2003068598A1 (en) 2003-08-21

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PCT/BR2003/000020 WO2003068598A1 (en) 2002-02-18 2003-02-17 Pressure equalizer device with ballistic resistance

Country Status (3)

Country Link
AU (1) AU2003212124A1 (en)
BR (1) BR0200429B1 (en)
WO (1) WO2003068598A1 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4033247A (en) * 1975-12-17 1977-07-05 Mcdonnell Douglas Corporation Vent structure
US5118053A (en) * 1989-09-27 1992-06-02 The Boeing Company Pressure equalization systems

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4033247A (en) * 1975-12-17 1977-07-05 Mcdonnell Douglas Corporation Vent structure
US5118053A (en) * 1989-09-27 1992-06-02 The Boeing Company Pressure equalization systems

Also Published As

Publication number Publication date
BR0200429A (en) 2003-10-21
AU2003212124A1 (en) 2003-09-04
BR0200429B1 (en) 2010-12-14

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