PatentDe  


Dokumentenidentifikation EP1425219 11.08.2005
EP-Veröffentlichungsnummer 0001425219
Titel ABGASSTRAHLENBESTÄNDIGE FAHRZEUGFANGBLÖCKE, -BETTEN UND VERFAHREN DAFÜR
Anmelder Engineered Arresting Systems Corp., Aston, Pa., US
Erfinder ALLEN, Glenn, Aston, US;
ANGLEY, D., Richard, Aston, US;
GORDON, L., John, Boothwyn, US;
MAHAL, T., Peter, Ardmore, US;
VALENTINI, C., Silvia, West Chester, US
Vertreter derzeit kein Vertreter bestellt
DE-Aktenzeichen 60204971
Vertragsstaaten AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, IE, IT, LI, LU, MC, NL, PT, SE, SK, TR
Sprache des Dokument EN
EP-Anmeldetag 13.09.2002
EP-Aktenzeichen 027758150
WO-Anmeldetag 13.09.2002
PCT-Aktenzeichen PCT/US02/29253
WO-Veröffentlichungsnummer 0003022682
WO-Veröffentlichungsdatum 20.03.2003
EP-Offenlegungsdatum 09.06.2004
EP date of grant 06.07.2005
Veröffentlichungstag im Patentblatt 11.08.2005
IPC-Hauptklasse B64F 1/02

Beschreibung[en]

This invention relates to arresting the forward motion of vehicles, such as aircraft overrunning a runway, and more particularly to arresting embodiments with improved resistance to jet blast and other potentially destructive forces.

BACKGROUND OF THE INVENTION

The problem of aircraft overrunning the ends of runways, with the possibility of passenger injury and aircraft damage, is discussed in U.S. patent No. 5,885,025, "VEHICLE ARRESTING BED SYSTEMS" (which may be referred to as "the '025 patent" and which constitutes the closest prior art. That patent, together with U.S. patent No. 5,902,068, "VEHICLE ARRESTING UNIT FABRICATION METHOD" (the '068 patent) and U.S. patent No. 5,789,681, "ARRESTING MATERIAL TEST APPARATUS AND METHODS" (the '681 patent) describe arresting beds, units and fabrication methods, and testing based on application of cellular concrete for arresting purposes. The disclosures of the '025, '068 and '681 patents are hereby incorporated herein by reference.

By way of example, Figs. 1A, 1B and 1C provide top, side and end views of a vehicle arresting bed constructed of cellular concrete blocks for installation at the end of an airport runway. As more fully described in the '025 patent, an overrunning aircraft enters the bed via a sloped ramp and encounters an array of cellular concrete blocks of increasing height and compressive gradient strength. Such compressive gradient strengths and the bed geometry are predetermined to enable forward travel to be arrested, while minimizing the potential for passenger injury and aircraft damage. In these figures, vertical dimensions and individual block size are expanded for clarity. An actual arresting bed may have dimensions of the order of 45.7 metres (150 feet) in width, with a maximum height or thickness of 0.76 metres (30 mches), and mclude thousands of blocks of 1.22 metres by 1 22 metres (four foot by four foot) or 1 22 metres by 2.44 metres (four foot by eight foot) horizontal dimensions.

Arresting beds constructed pursuant to the above patents, with installations at major airports, have been shown to be effective in safely stopping aircraft under actual emergency overrun conditions. For example, the arresting of an overrunning airliner at JFK International Airport by an arresting bed fabricated by the assignee of the present invention, was reported in the New York Times of May 13, 1999. However, in some applications, depending in part upon particular airport layout, the proximity of jet blast or other physical forces may give rise to deteriorating or destructive effects which could limit the useful life of an arresting bed. Material such as cellular concrete, when used in an arresting bed, must have limited strength to permit compressive failure of the concrete without destruction of the landing gear of an aircraft, for example. Thus, the requirement to limit the strength of compressible material used for arresting purposes, in turn may make the material susceptible to damage or destruction by sonic, pressure, vibrational, lift, projected gravel and other characteristics and effects of jet blast from nearby aircraft, as well as from other sources, such as objects, people or vehicles making contact with an arresting bed other than during actual arresting incidents. As to jet blast phenomena in particular, measured conditions at an end-of-runway arresting bed installation site have included wind velocities to 78.7 ms-1 (176 MPH) and 150 dB or higher sonic levels.

Accordingly, objects of the present invention are to provide new and improved arresting blocks and beds, and methods relating thereto, which may have one or more of the following characteristics and capabilities:

  • predetermined performance during aircraft arrestment;
  • improved resistance to some or all jet blast phenomena;
  • improved resistance to damage from pedestrian and maintenance vehicle traffic;
  • improved durability in installations in close proximity to aircraft operations;
  • improved resistance to atmospheric conditions;
  • simplified installation and replacement; and
  • improved resistance to damage during shipment and installation.

SUMMARY OF THE INVENTION

In accordance with the invention, a vehicle arresting unit may include a block of compressible material, a top sheet of frangible material, intermediate material between the block and top sheet to reduce transmission of effects of external phenomena (e.g., jet blast phenomena) and a wrapping at least partially enclosing the other elements.

In particular applications, the block may be cellular concrete 0.15 to 0.76 metres (6 to 30 mches) thick, the top sheet may be cement board about 6.4 x 10-3 metres (one-quarter inch) thick, the intermediate matenal may be polyethylene foam about 6.4 x 10-3 metres (one-quarter inch) thick and the wrapping may be polyester net. Such a vehicle arresting unit may also include a bottom sheet of cement board and an overlying sealant material having a water resistant characteristic.

Also in accordance with the invention, a method of fabricating a vehicle arresting unit may include the following steps:

  • (a) providing a block of compressible material having top, bottom and side surfaces;
  • (b) positioning intermediate material having a force transmission mitigation characteristic above the top surface;
  • (c) positioning a top sheet of frangible material above the intermediate material; and
  • (d) securing the top sheet and intermediate material to the block.

In particular applications, step (d) above may comprise at least partially enclosing the block, top sheet and intermediate material in a wrapping, and additional steps of adding a bottom protective sheet and applying sealant material to the unit may be included.

For a better understanding of the invention, together with other and further objects, reference is made to the accompanying drawings and the scope of the invention will be pointed out in the accompanying claims.

BRIEF DESCRIPTION OF THE DRAWINGS

  • Figs. 1A, 1B and 1C are respectively a plan view, and longitudinal and transverse cross-sectional views, of a vehicle arresting bed.
  • Fig. 2 is an orthographic view of a vehicle arresting unit in accordance with the invention.
  • Fig. 3 is a flow chart useful in describing a method of fabricating a vehicle arresting unit in accordance with the invention.

DESCRIPTION OF THE INVENTION

Fig. 2 illustrates an embodiment of a vehicle arresting unit 10 pursuant to the invention. The drawing is not necessarily to scale and may represent an arresting unit of dimensions 1.22 x 1.22 metres (four feet by four feet) by 0.15 to 0.76 metres (six to thirty inches) thick, for example.

As shown, vehicle arresting unit 10 includes a block of compressible material 12, having top, bottom and side surfaces and a top to bottom thickness. Block 12 may be cellular concrete fabricated in accordance with the '068 patent or otherwise, or may be formed of phenolic foam, ceramic foam, or other suitable material. As described in the '025 patent, for aircraft arresting applications suitable arresting material characteristics are selected to enable aircraft travel to be arrested within a desired distance, without causing passenger injury or aircraft damage such as landing gear failure. For example, cellular concrete fabricated so as to provide a compressive gradient strength ranging between 0.41 to 0.55 x 106 Nm-2 (60 to 80 psi (pounds per square inch)) over a 66 to 80 percent penetration range has been found suitable for use in an arresting bed. Fabrication and testing of cellular concrete for such applications is described in the '068 and '681 patents.

Arresting unit 10 has a top sheet 14 of frangible material positioned above the top surface of unit 10 and nominally coextensive therewith. As will be further discussed, in installations in which an arresting bed is positioned in relatively close proximity to operating aircraft, jet blast phenomena and other external forces may have deleterious effects on compressible materials of strength suitable for arresting bed applications. Pursuant to the invention, top sheet 14 in combination with other elements of arresting unit 10 provides increased resistance to such effects.

In a currently preferred embodiment top sheet 14 may comprise a section of cement board of thickness of 0.13 metres (one-half inch) or less. The thickness may, for example, fall within a nominal range of 6.4 x 10-3 to 7.9 x 10-3 metres (one-quarter to five-sixteenths inch). For present purposes, the term "cement board" is used to refer to a commercially available product, such as provided in sheet form under the trademarks "Durock" (of USG Corp.) and "Wonderboard" (of Custom Building Products Corp.). Also for present purposes, the term "nominal" or "nominally" is used to identify a value or dimension within plus or minus fifteen percent of a stated reference value, dimension or range. The word "frangible" is used in its ordinary dictionary sense of being breakable or shatterable without necessarily implying weakness or delicacy.

Arresting unit 10, in the illustrated embodiment, has intermediate material 16 positioned between top sheet 14 and the top surface of block 12. Intermediate material 16 may be a sheet or layer of foam material, such as closed-cell polyethylene foam, or other material selected for placement between top sheet 14 and the top surface of block 12. Intermediate material 16 may typically be pliable and may have compressible or resilient properties, or both, and is preferably equally breakable in both main dimensions. To reduce transmission of effects of external phenomena in the context of the combination of components comprising arresting unit 10, intermediate material 16 may be selected to provide a force transmission mitigation characteristic. Suitable material and thickness can be specified in particular applications in view of the nature and severity of applicable phenomena. For present purposes, the term "mitigation characteristic" is used consistent with the ordinary dictionary sense of "mitigate" of causing to become less harsh, hostile or severe, and may include one or more of spreading, dispersing, diluting, deflecting, dissipating, attenuating, cushioning, or generally lessening destructive effects on a surface or layer below material having a force transmission mitigation characteristic.

In a presently preferred embodiment employing a cellular concrete block and 7.9 x 10-3 metres (five-sixteenths inch) thick cement board top sheet, 6.4 x 10-3 metres (one-quarter inch) thick closed-cell polyethylene foam material is included for aircraft arresting bed applications. Such a foam sheet is thus considered to provide an adequate force mitigation characteristic suitable for a typical application. In other embodiments subject to different levels of external phenomena (e.g., higher or lower levels of jet blast phenomena) the intermediate material 16 may comprise other suitable material and may be thicker, thinner or may be omitted. Thus, in some applications the top sheet 14 may provide an adequate level of isolation of the block 12 from the external phenomena levels actually present, without inclusion of intermediate material 16.

Arresting unit 10 of Fig. 2 includes a wrapping 18 at least partially enclosing block 12, top sheet 14 and intermediate material 16. Wrapping 18 may be a fabric (e.g., a section of polyester net or other woven or non-woven material), a film (e.g., a perforated or solid, breathable or other plastic film or shrink wrap material), strapping or other suitable wrapping. While wrapping 18 is illustrated as being opaque, it may typically be basically transparent. As will be described, arresting unit 10 may also include a bottom layer 20 and wrapping 18 may partially or completely enclose all of elements 12, 14, 16 and 20 of unit 10. Wrapping 18 may bear or have applied to it an adhesive or adherent suitable to at least partially bond or hold wrapping 18 to some or all of the other components of unit 10. A suitable adhesive material may also be applied between the lower surface of wrapping 18 and a runway surface.

A basic function of wrapping 18 is to aid in maintaining structural integrity of unit 10 during non-emergency conditions, while being subject to tearing, breakage or other partial or complete disintegration during an arresting incident, so as not to interfere with desired compressive failure of unit 10 under arresting conditions. Consistent with this, a function of wrapping 18 is to facilitate adhesion of unit 10 to a runway or other smface, so as to both maintain integrity of the unit and its components, and also resist uplift forces associated with jet blast which may tend to displace unit 10. If the lower portion of wrapping 18 is adhered to a runway during installation, its upper portions will thus aid in resisting lifting forces affecting unit 10.

As noted, arresting unit 10 may have a bottom layer 20 positioned below the bottom surface of block 12 and nominally coextensive therewith. Layer 20 may comprise a sheet of cement board, a layer of cellular concrete of greater strength than block 12, or other suitable material. A basic function of layer 20 is to permit arresting unit 10 to be adhered to a runway extension or other surface to hold the unit 10 in a desired position. As such, layer 20 is desirably harder or stronger than the material of block 12, so that a greater surface to surface mounting or adherence capacity is provided without the potential for upper portions of block 12 to break away from a lower portion of block 12, if it were directly adhered to a surface of a runway extension. Thus, layer 20 is selected to provide an improved mounting or adherence capacity and, when held to the block 12 by wrapping 18, to thereby provide an improved mounting or adherence capability for the complete unit 10. Block 12 may be formed by pouring cellular concrete into a mold. For inclusion of layer 20, it may be placed in the bottom of such mold first and the block cast on top of it. Alternatively, layer 20 may be placed beneath a block of compressive material previously fabricated.

Arresting unit 10 may have a sealant material 22, with a water resistant characteristic, overlying part or all of wrapping 18. The sealant material, of polyurethane or other suitable material, may particularly be placed on the top of arresting unit 10 to provide additional protection from external phenomena associated with jet blast and other forces as well as from effects of weather. Alternatively, wrapping 18 may itself provide a water resistant characteristic or incorporate, or have applied to it before installation, a suitable sealant material.

Relevant external phenomena comprise jet blast phenomena, which may include sonic, vibrational, pressure, lift, erosive (e.g., by airborne gravel) and other characteristics and effects, as well as compressive and other forces resulting from persons, vehicles or objects making contact with an arresting bed other than during actual arresting incidents. Described components of the arresting unit 10 may be selected to reduce or mitigate effects of such external phenomena on block 12 (e.g., provide a level of protection to block 12 relative to external phenomena incident on top sheet 14) and thereby provide a force transmission mitigation characteristic as described above, to enhance arresting unit resistance to such phenomena. At the same time, the components and the composite arresting unit itself must not be so strong or force resistant as to subvert the basic required parameters of unit compression/failure with desired characteristics upon contact by the wheel of an aircraft overrunning a runway. Arresting units as described thus provide predetermined failure characteristics when arresting a vehicle, while providing improved resistance to deleterious effects of external phenomena in the absence of overrunning aircraft.

Fig. 3 is a flow chart useful in describing a method utilizing the invention.

At 30, a block 12 of compressible material having characteristics appropriate for a vehicle arresting application is provided. As noted, the block may comprise cellular concrete having an appropriate compressive gradient strength as described in the '068 patent or other suitable material. For aircraft arresting bed applications the block may typically have dimensions of approximately 1.22 by 1.22 metres by 0.15 to 0.76 metres in thickness (four feet by four feet by six to 30 inches in thickness).

At 31, intermediate material 16 is positioned above the top surface of block 12. Intermediate material 16 may comprise a layer of closed-cell or other foam or other material providing a desired force transmission mitigation characteristic with respect to external phenomena. Such material may or may not have energy absorption properties, depending upon the particular material selected and may have a thickness up to one-half inch or more. In a currently preferred embodiment intermediate material 16 is provided in the form of a sheet of polyethylene foam of approximately one-quarter inch thickness. In some embodiments intermediate material 16 may be omitted (e.g., in view of the expected severity of external phenomena).

At 32, a top sheet 14 of frangible material is positioned above intermediate material 16. As discussed, top sheet 14 may comprise a section of cement board or other suitable material. Typically, if commercially available cement board is used for top sheet 14, it may have a thickness of up to about one-half inch, with a five-sixteenths inch thickness used in a currently preferred embodiment.

At 33, a bottom layer 20 is positioned below the bottom surface of block 12. As discussed, bottom layer 20 may comprise a section of cement board, a layer of cellular concrete of greater strength than block 12, or other suitable material. Bottom layer 20 is thus typically harder or stronger, or both, than the material of block 12, to provide added strength and stability in bonding or adhering the arresting unit to the surface of a runway extension and in preventing the net or strapping used for wrapping from being pulled upward into the block material during an arresting incident. In some applications bottom layer 20 may be omitted in view of overall arresting unit operational requirements.

At 34, top sheet 14 and intermediate material 16 are secured to block 12. As discussed, this may be accomplished by a wrapping 18 which at least partially encloses other components of the arresting unit 10. In a currently preferred embodiment, wrapping 18 comprises a section of polyester net constructed of 360 to 400 N (80 to 90 pound) breaking strength strands, with net openings less than 6.4 x 10-3 metres (one-quarter inch) square. In other embodiments fabric, plastic film, perforated shrink wrap, strapping or other suitable materials selected to provide adequate strength, with appropriate failure characteristics during an arresting incident, may be employed.

At 35, a sealant may be applied to the top of arresting unit 10, and to other surfaces as selected, to provide a water resistant characteristic. In a currently preferred embodiment, polyurethane with an epoxy undercoat is used for this purpose, however other suitable materials may be employed and may provide both water resistance and some degree of additional resistance to external phenomena, such as ultraviolet radiation.

With an understanding of the invention, it will be apparent that steps of the above method may be modified, varied as to order, omitted and supplemented by additional or different steps. Skilled persons will be enabled to select suitable materials and configurations as appropriate for particular applications and operating conditions. As noted, it may be desirable to glue or adhere the wrapping to the other components of the arresting unit. Also, in particular applications certain components may be omitted, varied or supplemented consistent with the invention.

While there have been described the currently preferred embodiments of the invention, those skilled in the art will recognize that other and further modifications may be made without departing from the invention and it is intended to claim all modifications and variations as fall within the scope of the invention.


Anspruch[de]
  1. Fahrzeugfangeinheit, die einen Block (12) aus einem zusammendrückbaren Material umfaßt, der eine obere, eine untere und Seitenflächen und eine Dicke von oben nach unten hat, wobei die Einheit gekennzeichnet ist durch:
    • eine obere Lage (14) aus einem zerbrechlichen Material, mit einer größeren Beständigkeit gegenüber Abgasstrahlerscheinungen als das zusammendrückbare Material, die oberhalb der oberen Fläche angeordnet wird, und
    • ein Zwischenmaterial (16), das zwischen der oberen Lage und der oberen Fläche angeordnet wird, um die Übertragung der auf die obere Lage auftreffenden Abgasstrahlerscheinungen abzuschwächen.
  2. Fahrzeugfangeinheit nach Anspruch 1, bei der das Zwischenmaterial (16) eine Lage eines biegsamen Materials umfaßt, um die Übertragung von Wirkungen von auf die obere Lage auftreffenden äußeren Erscheinungen abzuschwächen.
  3. Fahrzeugfangeinheit nach Anspruch 1, bei der die obere Lage (14) und das Zwischenmaterial (16) jeweils eine Dicke haben, die 0,013 Meter (einen halben Zoll) nicht überschreitet.
  4. Fahrzeugfangeinheit nach Anspruch 1, bei der das zerbrechliche Material eine größere Härte als der Porenbeton hat.
  5. Fahrzeugfangeinheit nach Anspruch 1, bei der das Zwischenmaterial (16) eine Lage eines Schaumstoffmaterials umfaßt.
  6. Fahrzeugfangeinheit nach Anspruch 1, bei der die obere Lage (14) einen Abschnitt aus Zementkarton mit einer Dicke in einem Nennbereich von 6,4 x 10-3 bis 7,9 x 10-3 Meter (ein Viertel bis fünf Sechszehntel Zoll) umfaßt.
  7. Fahrzeugfangeinheit nach Anspruch 6, bei der das Zwischenmaterial (16) eine Lage eines Polyethylen-Schaumstoffinaterials umfaßt.
  8. Fahrzeugfangeinheit nach Anspruch 1, die außerdem folgendes umfaßt:
    • eine untere Lage (20) aus einem Material mit einer größeren Festigkeit als das zusammendrückbare Material, wobei die untere Lage unterhalb der unteren Fläche angeordnet wird und sich nominell zusammen mit derselben erstreckt.
  9. Fahrzeugfangeinheit nach Anspruch 1, die außerdem folgendes umfaßt:
    • eine untere Lage (20) aus Porenbeton mit einer größeren Festigkeit als das zusammendrückbare Material des Blocks, wobei die untere Lage unterhalb der unteren Fläche angeordnet wird und sich nominell zusammen mit derselben erstreckt.
  10. Fahrzeugfangeinheit nach Anspruch 1, die außerdem folgendes umfaßt:
    • eine Hülle (18), die den Block, die obere Lage und das Zwischenmaterial wenigstens teilweise umschließt.
  11. Fahrzeugfangeinheit nach Anspruch 10, die außerdem folgendes umfaßt:
    • Klebematerial, das die Hülle wenigstens an Abschnitte der Einheit klebt.
  12. Fahrzeugfangeinheit nach Anspruch 10, die außerdem folgendes umfaßt:
    • Abdichtmaterial (22) mit einer wasserbeständigen Charakteristik, das die Hülle wenigstens teilweise überdeckt.
  13. Fahrzeugfangbett, das folgendes umfaßt:
    • eine Vielzahl von Fahrzeugfangeinheiten, jede nach Anspruch 1, angeordnet in Spalten und Reihen.
  14. Verfahren zum Herstellen eines Fahrzeugfangbetts, wobei das Verfahren folgendes umfaßt:
    • (a) Bereitstellen einer Vielzahl von Fahrzeugfangeinheiten, jede nach Anspruch 1, und
    • (b) Anordnen der Einheiten, so daß sie eine Fläche mit einer Breite und Länge abdecken, die dafür geeignet sind, die Fahrt eines Fahrzeugs zu fangen, das in das Bett eintritt.
  15. Fahrzeugfangeinheit, die einen Block (12) aus einem zusammendrückbaren Material umfaßt, der eine obere, eine untere und Seitenflächen und eine Dicke von oben nach unten hat, wobei die Einheit gekennzeichnet ist durch:
    • eine obere Lage (14) aus einem zerbrechlichen Material, mit einer größeren Beständigkeit gegenüber Abgasstrahlerscheinungen als das zusammendrückbare Material, die oberhalb der oberen Fläche angeordnet wird, und
    • eine Hülle (18), die den Block und die obere Lage wenigstens teilweise umschließt.
  16. Fahrzeugfangeinheit nach Anspruch 15, bei der die obere Lage (14) eine größere Härte als das zusammendrückbare Material hat.
  17. Fahrzeugfangeinheit nach Anspruch 15, bei der die Hülle (18) einen Abschnitt aus Polyesternetz umfaßt.
  18. Fahrzeugfangeinheit nach Anspruch 15, die außerdem folgendes umfaßt:
    • eine Zwischenlage aus einem Schaumstoffmaterial, angeordnet zwischen der oberen Lage und der oberen Fläche.
  19. Fahrzeugfangeinheit nach Anspruch 18, bei der die Zwischenlage Polyurethanschaumstoff umfaßt.
  20. Fahrzeugfangeinheit nach Anspruch 15, bei welcher der Block (12) aus einem zusammendrückbaren Material ein Block aus Porenbeton ist.
  21. Fahrzeugfangbett, das folgendes umfaßt:
    • eine Vielzahl von Fahrzeugfangeinheiten, jede nach Anspruch 15, angeordnet in Spalten und Reihen.
  22. Verfahren zum Herstellen eines Fahrzeugfangbetts, wobei das Verfahren folgendes umfaßt:
    • (a) Bereitstellen einer Vielzahl von Fahrzeugfangeinheiten, jede nach Anspruch 15, und
    • (b) Anordnen der Einheiten, so daß sie eine Fläche mit einer Breite und Länge abdecken, die dafür geeignet sind, die Fahrt eines Fahrzeugs zu fangen, das in das Bett eintritt.
  23. Verfahren zum Herstellen einer Fahrzeugfangeinheit (10), wobei die Einheit einen Block (12) aus einem zusammendrückbaren Material umfaßt, der eine obere, eine untere und Seitenflächen hat, wobei das Verfahren die folgenden Schritte umfaßt:
    • (a) Anordnen einer oberen Lage (14) aus einem zerbrechlichen Material oberhalb der oberen Fläche und
    • (b) Befestigen der oberen Lage an dem Block.
  24. Verfahren nach Anspruch 23, das außerdem den folgenden Schritt umfaßt, der Schritt (a) vorausgeht:
    • (x) Anordnen eines Zwischenmaterials (16), das eine Kraftübertragungsabschwächungscharakteristik hat, zwischen der oberen Fläche und der oberen Lage.
  25. Verfahren nach Anspruch 24, bei dem Schritt (x) umfaßt, eine Lage aus einem Schaumstoffinaterial anzuordnen.
  26. Verfahren nach Anspruch 23, bei dem der Block (12) ein Block aus Porenbeton ist.
  27. Verfahren nach Anspruch 23, bei dem Schritt (a) umfaßt, eine obere Lage (14) aus einem zerbrechlichen Material, das eine größere Festigkeit als das zusammendrückbare Material hat, anzuordnen.
  28. Verfahren nach Anspruch 23, bei dem Schritt (a) umfaßt, einen Abschnitt aus Zementkarton mit einer Dicke, die 0,0159 Meter (fünf Achtel Zoll) nicht überschreitet, anzuordnen.
  29. Verfahren nach Anspruch 23, bei dem Schritt (b) umfaßt, den Block und die obere Lage wenigstens teilweise in einer Hülle (18) zu umschließen.
  30. Verfahren nach Anspruch 23, bei dem Schritt (b) umfaßt, den Block und die obere Lage wenigstens teilweise in einem Abschnitt aus Polyesternetz zu umschließen.
  31. Verfahren nach Anspruch 23, das zwischen den Schritten (a) und (b) den folgenden zusätzlichen Schritt umfaßt:
    • (y) Anordnen einer unteren Lage (20) aus einem Material mit einer größeren Festigkeit als das zusammendrückbare Material unterhalb des Blocks.
  32. Verfahren nach Anspruch 23, das außerdem den folgenden Schritt umfaßt:
    • (c) Aufbringen eines Dichtungsmaterials (22), das eine wasserbeständige Charakteristik hat, auf einen Oberflächenbereich der Einheit.
  33. Verfahren zum Herstellen eines Fahrzeugfangbetts, wobei das Verfahren folgendes umfaßt:
    • (a) Herstellen einer Vielzahl von Fahrzeugfangeinheiten, jede nach Anspruch 23, und
    • (b) Anordnen der Einheiten, so daß sie eine Fläche mit einer Breite und Länge abdecken, die dafür geeignet sind, die Fahrt eines Fahrzeugs zu fangen, das in das Bett eintritt.
Anspruch[en]
  1. A vehicle arresting unit, comprising a block (12) of compressible material having top, bottom and side surfaces and a top to bottom thickness, the unitcharacterised by:
    • a top sheet (14) of frangible material, with greater resistance to jet blast phenomena than said compressible material, positioned above said top surface; and
    • intermediate material (16) positioned between said top sheet and said top surface to mitigate transmission of jet blast phenomena incident upon the top sheet.
  2. A vehicle arresting unit as in claim 1, wherein said intermediate material (16) comprises a sheet of pliable material to mitigate transmission of effects of external phenomena incident upon the top sheet.
  3. A vehicle arresting unit as in claim 1, wherein said top sheet (14) and said intermediate material (16) each have a thickness not exceeding 0.13 metres (one-half inch).
  4. A vehicle arresting unit as in claim 1, wherein said frangible material has a hardness greater than said cellular concrete.
  5. A vehicle arresting unit as in claim 1, wherein said intermediate material (16) compnses a sheet of foam material.
  6. A vehicle arresting unit as in claim 1, wherem said top sheet (14) comprises a section of cement board with a thickness in a nominal range of 6.4 x 10-3 to 7.9 x 10-3 metres (one-quarter to five-sixteenths inch).
  7. A vehicle arresting unit as in claim 6, wherein said intermediate material (16) comprises a sheet of polyethylene foam material.
  8. A vehicle arresting unit as in claim 1, additionally comprising:
    • a bottom layer (20) of material of strength greater than said compressible material the bottom layer positioned below said bottom surface and nominally coextensive therewith.
  9. A vehicle arresting unit as in claim 1, additionally comprising:
    • a bottom layer (20) of cellular concrete of strength greater than the compressible material of said block, the bottom layer positioned below said bottom surface and nominally coextensive therewith.
  10. A vehicle arresting unit as in claim 1, additionally comprising:
    • a wrapping (18) at least partially enclosing said block, said top sheet and said intermediate material
  11. A vehicle arresting unit as in claim 10, additionally comprising:
    • adhesive material adhering the wrapping to at least portions of said unit.
  12. A vehicle arresting unit as in claim 10, additionally comprising:
    • sealant material (22), having a water resistant characteristic, at least partially overlying said wrapping.
  13. A vehicle arresting bed, comprising:
    • a plurality of vehicle arresting units, each in accordance with claim 1, arranged in columns and rows.
  14. A method of forming a vehicle arresting bed, comprising:
    • (a) providing a plurality of vehicle arresting units, each in accordance with claim 1; and
    • (b) positioning said units to cover an area of width and length suitable to arrest travel of a vehicle entering the bed.
  15. A vehicle arresting unit (10), comprising a block (12) of compressible material having top, bottom and side surfaces and a top to bottom thickness, the unitcharacterised by:
    • a top sheet (14) of frangible material, with greater resistance to jet blast phenomena than said compressible matenal, positioned above said top surface; and
    • a wrapping (18) at least partially enclosing said block and top sheet.
  16. A vehicle arresting unit as in claim 15, wherein said top sheet (14) has a hardness greater than said compressible material.
  17. A vehicle arresting unit as in claim 15, wherein said wrapping (18) comprises a section of polyester net.
  18. A vehicle arresting unit as in claim 15, additionally comprising:
    • an intermediate layer of foam material positioned between said top sheet and said top surface.
  19. A vehicle arresting unit as in claim 18, wherein said intermediate layer comprises polyurethane foam.
  20. A vehicle arresting unit as in claim 15, wherein said block (12) of compressible material is a block of cellular concrete.
  21. A vehicle arresting bed, comprising:
    • a plurality of vehicle arresting units, each in accordance with claim 15, arranged in columns and rows.
  22. A method of forming a vehicle arresting bed, comprising:
    • (a) providing a plurality of vehicle arresting units, each m accordance with claim 15; and
    • (b) positioning said units to cover an area of width and length suitable to arrest travel of a vehicle entering the bed.
  23. A method of fabricating a vehicle arresting unit (10), said unit comprising a block (12) of compressible material having top, bottom and side surfaces, comprising the steps of.
    • (a) positioning a top sheet (14) of frangible material above said top surface; and
    • (b) securing said top sheet to said block.
  24. A method as in claim 23, additionally comprising the following step preceding step (a):
    • (x) positioning intermediate material (16) having a force transmission mitigation characteristic between said top surface and said top sheet.
  25. A method as in claim 24, wherein said step (x) comprises positioning a sheet of foam material.
  26. A method as in claim 23, wherein block (12) is a block of cellular concrete.
  27. A method as in claim 23, wherein step (a) comprises positioning a top sheet (14) of frangible material having a strength greater than said compressible material.
  28. A method as m claim 23, wherein step (a) comprises positioning a section of cement board of thickness not exceeding 0.0159 metres (five-eighths of an inch).
  29. A method as in claim 23, wherein step (b) comprises at least partially enclosing said block and top sheet in a wrapping (18).
  30. A method as in claim 23, wherein step (b) comprises at least partially enclosing said block and top sheet in a section of polyester net.
  31. A method as in claim 23, including an additional step between steps (a) and (b), as follows:
    • (y) positioning a bottom layer (20) of matenal, of strength greater than the compressible material, below the block.
  32. A method as in claim 23, additionally comprising the following step:
    • (c) applying sealant material (22), having a water resistant characteristic, to a surface area of said unit.
  33. A method of forming a vehicle arresting bed comprising:
    • (a) forming a plurality of vehicle arresting units, each in accordance with claim 23; and
    • (b) positioning said units to cover an area of width and length suitable to arrest travel of a vehicle entering the bed.
Anspruch[fr]
  1. Unité d'arrêt de véhicule, comprenant un bloc (12) de matériau compressible, comportant des surfaces supérieure, inférieure et latérales et ayant une épaisseur allant du haut vers le bas, l'unité étant caractérisée par:
    • une feuille supérieure (14) de matériau frangible, ayant une résistance aux phénomènes de souffle de réacteur supérieure à celle dudit matériau compressible, positionnée au-dessus de ladite surface supérieure; et
    • un matériau intermédiaire (16) positionné entre ladite feuille supérieure et ladite surface supérieure pour atténuer la transmission des phénomènes du souffle de réacteur sur la feuille supérieure.
  2. Unité d'arrêt de véhicule selon la revendication 1, dans laquelle ledit matériau intermédiaire (16) comprend une feuille de matériau pliable pour atténuer la transmission des effets des phénomènes externes sur la feuille supérieure.
  3. Unité d'arrêt de véhicule selon la revendication 1, dans laquelle ladite feuille supérieure (14) et ledit matériau intermédiaire (16) ont chacun une épaisseur ne dépassant pas 0,013 mètres (un demi pouce).
  4. Unité d'arrêt de véhicule selon la revendication 1, dans laquelle ledit matériau frangible a une dureté supérieure à celle dudit béton cellulaire.
  5. Unité d'arrêt de véhicule selon la revendication 1, dans laquelle ledit matériau intermédiaire (16) comprend une feuille de matériau de mousse.
  6. Unité d'arrêt de véhicule selon la revendication 1, dans laquelle ladite feuille supérieure (14) comprend une section d'un panneau de ciment avec une épaisseur comprise dans un intervalle nominal allant de 6,4 x 10-3 à 7,9 x 10-3 mètres (un quart à cinq seizièmes de pouce).
  7. Unité d'arrêt de véhicule selon la revendication 6, dans laquelle ledit matériau intermédiaire (16) comprend une feuille de matériau de mousse de polyéthylène.
  8. Unité d'arrêt de véhicule selon la revendication 1, comprenant en outre:
    • une couche inférieure (20) de matériau ayant une résistance supérieure à celle dudit matériau compressible, la couche inférieure étant positionnée au-dessous de ladite surface inférieure et pouvant s'étendre nominalement avec celle-ci.
  9. Unité d'arrêt de véhicule selon la revendication 1, comprenant en outre:
    • une couche inférieure (20) de béton cellulaire positionnée au-dessous de ladite surface inférieure et pouvant s'étendre nominalement avec celle-ci.
  10. Unité d'arrêt de véhicule selon la revendication 1, comprenant en outre:
    • une enveloppe (18), renfermant au moins partiellement ledit bloc, ladite feuille supérieure et ledit matériau intermédiaire.
  11. Unité d'arrêt de véhicule selon la revendication 10, comprenant en outre:
    • un matériau adhésif entraînant l'adhésion de l'enveloppe à au moins des parties de ladite unité.
  12. Unité d'arrêt de véhicule selon la revendication 10, comprenant en outre:
    • un matériau d'étanchéité (22), ayant une caractéristique de résistance à l'eau, superposé au moins partiellement à ladite enveloppe.
  13. Lit d'arrêt de véhicule, comprenant:
    • plusieurs unités d'arrêt de véhicule, chacun selon la revendication 1, agencées dans des colonnes et des rangées.
  14. Procédé de formation d'un lit d'arrêt de véhicule, comprenant les étapes ci-dessous:
    • (a) fourniture de plusieurs unités d'arrêt de véhicule, chacune selon la revendication 1; et
    • (b) positionnement desdites unités de sorte à couvrir une zone de largeur et de longueur appropriées pour arrêter le déplacement d'un véhicule entrant dans le lit.
  15. Unité d'arrêt de véhicule (10), comprenant un bloc (12) de matériau compressible, comportant des surfaces supérieure, inférieure et latérales et ayant une épaisseur allant du haut vers le bas, l'unité étant caractérisée par:
    • une feuille supérieure (14) de matériau frangible, ayant une résistance aux phénomènes de souffle de réacteur supérieure à celle dudit matériau compressible, positionnée au-dessus de ladite surface supérieure; et
    • une enveloppe (18) renfermant au moins partiellement ledit bloc et ladite feuille supérieure.
  16. Unité d'arrêt de véhicule selon la revendication 15, dans laquelle ladite feuille supérieure (14) a une dureté supérieure à celle dudit matériau compressible.
  17. Unité d'arrêt de véhicule selon la revendication 15, dans laquelle ladite enveloppe (18) comprend une section d'un filet de polyester.
  18. Unité d'arrêt de véhicule selon la revendication 15, comprenant en outre:
    • une couche intermédiaire de matériau de mousse positionnée entre ladite feuille supérieure et ladite surface supérieure.
  19. Unité d'arrêt de véhicule selon la revendication 18, dans laquelle ladite couche intermédiaire comprend de la mousse de polyuréthane.
  20. Unité d'arrêt de véhicule selon la revendication 15, dans laquelle ledit bloc (12) de matériau compressible est un bloc de béton cellulaire.
  21. Lit d'arrêt de véhicule, comprenant:
    • plusieurs unités d'arrêt de véhicule, chacune selon la revendication 15, agencées dans des colonnes et des rangées.
  22. Procédé de formation d'un lit d'arrêt de véhicule, comprenant les étapes ci-dessous:
    • (a) fourniture de plusieurs unités d'arrêt de véhicule, chacune selon la revendication 15; et
    • (b) positionnement desdites unités de sorte à couvrir une zone de largeur et de longueur appropriées pour arrêter le déplacement d'un véhicule entrant dans le lit.
  23. Procédé de fabrication d'une unité d'arrêt de véhicule (10), ladite unité comprenant un bloc (12) de matériau compressible comportant des surfaces supérieure, inférieure et latérales, comprenant les étapes ci-dessous:
    • (a) positionnement d'une feuille supérieure (14) de matériau frangible au-dessus de ladite surface supérieure; et
    • (b) fixation de ladite feuille supérieure sur ledit bloc.
  24. Procédé selon la revendication 23, comprenant en outre l'étape ci-dessous, précédant l'étape (a):
    • (x) positionnement d'un matériau intermédiaire (16) ayant une caractéristique d'atténuation de la transmission de la force entre ladite surface supérieure et ladite feuille supérieure.
  25. Procédé selon la revendication 24, dans lequel ladite étape (x) comprend l'étape de positionnement d'une feuille de matériau de mousse.
  26. Procédé selon la revendication 23, dans lequel le bloc (12) est un bloc de béton cellulaire.
  27. Procédé selon la revendication 23, dans lequel l'étape (a) comprend l'étape de positionnement d'une feuille supérieure (14) de matériau frangible ayant une résistance supérieure à celle dudit matériau compressible.
  28. Procédé selon la revendication 23, dans lequel l'étape (a) comprend l'étape de positionnement d'une section d'un panneau de ciment ayant une épaisseur ne dépassant pas 0,0159 mètres (cinq huitièmes de pouce).
  29. Procédé selon la revendication 23, dans lequel l'étape (b) comprend l'étape d'un renfermement au moins partiel dudit bloc et de ladite feuille supérieure dans une enveloppe (18).
  30. Procédé selon la revendication 23, dans lequel l'étape (b) comprend l'étape d'un renfermement au moins partiel dudit bloc et de ladite feuille supérieure dans une section d'un filet de polyester.
  31. Procédé selon la revendication 23, englobant, entre les étapes (a) et (b), l'étape additionnelle ci-dessous:
    • (y) positionnement d'une couche inférieure (20) de matériau ayant une résistance supérieure à celle du matériau compressible au-dessous du bloc.
  32. Procédé selon la revendication 23, comprenant en outre l'étape ci-dessous:
    • application d'un matériau d'étanchéité (22), ayant une caractéristique de résistance à l'eau, sur une aire de surface de ladite unité.
  33. Procédé de formation d'un lit d'arrêt de véhicule, comprenant les étapes ci-dessous:
    • (a) formation de plusieurs unités d'arrêt de véhicule, chacune selon la revendication 23; et
    • (b) positionnement desdites unités de sorte à couvrir une zone de largeur et de longueur appropriées pour arrêter le déplacement d'un véhicule entrant dans le lit.






IPC
A Täglicher Lebensbedarf
B Arbeitsverfahren; Transportieren
C Chemie; Hüttenwesen
D Textilien; Papier
E Bauwesen; Erdbohren; Bergbau
F Maschinenbau; Beleuchtung; Heizung; Waffen; Sprengen
G Physik
H Elektrotechnik

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