US20100330341A1 - Transparent blast and ballistic projectile resistant barrier - Google Patents
Transparent blast and ballistic projectile resistant barrier Download PDFInfo
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- US20100330341A1 US20100330341A1 US11/735,696 US73569607A US2010330341A1 US 20100330341 A1 US20100330341 A1 US 20100330341A1 US 73569607 A US73569607 A US 73569607A US 2010330341 A1 US2010330341 A1 US 2010330341A1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41H—ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
- F41H5/00—Armour; Armour plates
- F41H5/02—Plate construction
- F41H5/04—Plate construction composed of more than one layer
- F41H5/0492—Layered armour containing hard elements, e.g. plates, spheres, rods, separated from each other, the elements being connected to a further flexible layer or being embedded in a plastics or an elastomer matrix
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
- B32B17/02—Layered products essentially comprising sheet glass, or glass, slag, or like fibres in the form of fibres or filaments
- B32B17/04—Layered products essentially comprising sheet glass, or glass, slag, or like fibres in the form of fibres or filaments bonded with or embedded in a plastic substance
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/28—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
- B32B27/283—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42 comprising polysiloxanes
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- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
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- B32B3/08—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by features of form at particular places, e.g. in edge regions characterised by added members at particular parts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41H—ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
- F41H5/00—Armour; Armour plates
- F41H5/02—Plate construction
- F41H5/04—Plate construction composed of more than one layer
- F41H5/0407—Transparent bullet-proof laminatesinformative reference: layered products essentially comprising glass in general B32B17/06, e.g. B32B17/10009; manufacture or composition of glass, e.g. joining glass to glass C03; permanent multiple-glazing windows, e.g. with spacing therebetween, E06B3/66
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41H—ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
- F41H5/00—Armour; Armour plates
- F41H5/02—Plate construction
- F41H5/04—Plate construction composed of more than one layer
- F41H5/0414—Layered armour containing ceramic material
- F41H5/0428—Ceramic layers in combination with additional layers made of fibres, fabrics or plastics
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- B32B2571/00—Protective equipment
- B32B2571/02—Protective equipment defensive, e.g. armour plates, anti-ballistic clothing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y10T428/00—Stock material or miscellaneous articles
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- Y10T428/163—Next to unitary web or sheet of equal or greater extent
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
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- Y10T428/24479—Structurally defined web or sheet [e.g., overall dimension, etc.] including variation in thickness
- Y10T428/24612—Composite web or sheet
Definitions
- the present invention pertains to a projectile resistant barrier, and in particular a transparent blast or ballistic projectile resistant barrier.
- the barrier is comprised of a two-dimensional array of hardened tiles that are encapsulated in a resin layer.
- the hardened tiles are transparent ceramic tiles, and the resin layer is transparent polyurethane. Additional transparent polycarbonate layers and glass fiber layers are also employed in the preferred embodiment.
- the transparent barriers In the prior art construction of transparent blast and ballistic resistant barriers (i.e., bulletproof glass), the transparent barriers have been comprised of laminates made up of multiple layers of glass, of plastic, or of combinations of glass and plastic layers. These transparent barrier laminates provide protection against various threats based mainly on the thickness of the laminates.
- One of the optimal prior art transparent armor barriers includes an exterior layer or an initial layer of a very hard transparent ceramic material. This material is layered over a conventional glass or plastic backing layer.
- This design of transparent armor barrier has a reduced weight to area ratio, a reduced thickness to area ratio, and has improved light transmittance properties.
- this design of transparent armor barrier still has the disadvantages of multiple projectile hits on the barrier producing multiple shatter patterns that can effectively eliminate the ability to see through the barrier.
- this type of barrier typically has a substantial manufacturing cost in producing a transparent barrier of any practical size.
- the transparent blast and ballistic projectile resistant barrier of the present invention overcomes the disadvantages associated with the prior art transparent armor barriers discussed above.
- the transparent barrier of the present invention is basically comprised of a plurality of transparent hardened tiles that are arranged side-by-side in a two-dimensional array and are encapsulated in a transparent resin.
- the index of refraction of the tiles and index of refraction of the resin is the same, which enables a person to view through the transparent barrier without perceiving the existence of the hardened tiles in the barrier.
- the transparent tiles are ceramic tiles and the transparent resin is polyurethane.
- multiple layers of a transparent polycarbonate are adjoined to opposite surfaces of the plurality of tile and polyurethane layer, and a layer of glass fibers encapsulated in polyurethane reenforces the layer of the plurality of ceramic tiles and encapsulating urethane.
- the encapsulated transparent ceramic tiles in the transparent blast and ballistic projectile resistant barrier limits any damage due to a projectile hitting the barrier to the tile hit by the projectile.
- the polyurethane encapsulating the tile limits the progression of damage due to a projectile hit from being transferred to adjacent tiles. This overcomes the shattering problem of prior art transparent armor barriers.
- the interface between the transparent tiles and the transparent polyurethane is effectively invisible, giving the overall construction of the transparent armor barrier the required optical clarity.
- the transparent armor barrier of the invention provides a transparent barrier that has excellent performance in all of the desired properties including, a multi-hit capability, low weight, reduced thickness, resistant to breakage or cracking, improved light transmittance and low cost.
- FIG. 1 shows a schematic representation of the plurality of hard ceramic tiles encapsulated in the polyurethane layer of the invention.
- FIG. 2 is a view similar to that of FIG. 1 , but showing a different arrayed arrangement of the hard tiles in the urethane layer.
- FIG. 3 is a view similar to that of FIG. 1 , but showing a different arrangement and configuration of the hard tiles in the polyurethane layer.
- FIG. 4 is a view similar to FIG. 1 , but showing a different arrangement and configuration of the hard tiles in the polyurethane layer.
- FIG. 5 is a schematic representation of a cross-section of the transparent blast and ballistic projectile resistant barrier of the invention.
- the blast and ballistic projectile barrier 10 of the invention is designed as a transparent barrier.
- the foundation of the system is in a plurality of hard tiles 12 encapsulated in a layer of resin 14 . Together, the layer of tiles 12 encapsulated in the resin 14 are formed as a sheet.
- the tiles 12 are formed of a hard transparent material and are encapsulated in a hardened transparent resin layer 14 .
- the index of refraction of both the transparent tiles 12 and the resin layer 14 is the same, enabling a person to view through the barrier formed by the hardened tiles 12 and the resin layer 14 without the interface of the tiles in the layer of resin affecting the person's vision.
- the tiles 12 and the resin encapsulating layer 14 can be opaque materials.
- the plurality of hardened transparent tiles 12 are transparent ceramic tiles having a high aluminum oxide content.
- Alternative materials include borosilicate glass, any high strength glass, any glass containing ceramic compounds, or yttrium.
- the transparent ceramic tiles 12 are pressed or shaped tiles that do not require grinding or polishing.
- the resin 14 encapsulating the transparent tiles 12 is preferably polyurethane.
- Alternate materials include polymethylmethacrylate, polysiloxane, and silicone.
- each of the tiles 12 has a flat, parallel, front 16 and back 18 surface.
- the tiles 12 are also formed with flat sidewalls 22 that are arranged in a polygonal configuration.
- FIGS. 1-4 show various different possible configurations of the plurality of tiles 12 .
- the arrangements of the tiles 12 shown in FIGS. 1-4 are schematic representations.
- FIG. 1 shows the plurality of tiles 12 , each having a square or cube configuration.
- the tiles 12 are arranged in a two-dimensional arrayed layer of rows and columns.
- FIG. 2 shows a similar arrangement of the tiles 12 to that of FIG. 1 , with the tiles 12 arranged in rows, but not aligned in columns.
- FIG. 3 shows an embodiment where the tile sidewalls 12 have triangular configurations.
- FIG. 4 shows an embodiment where the tiles 12 have sidewalls 22 with rectangular configurations and with square configurations.
- FIGS. 1-4 illustrate the possibility of using a plurality of tiles 12 in the invention where the configurations of the tiles are varied.
- the tile sidewalls 22 give the tile a polygonal configuration. This enables the tiles to be arranged in a two-dimensional array, where the spacing between adjacent tiles is minimized. The spacing between adjacent tiles in each of FIGS. 1-4 is exaggerated.
- the plurality of tiles 12 are arranged in a single two-dimensional layer with opposing sidewalls of adjacent tiles 22 being in close proximity to each other. In the preferred embodiment the spacing between the opposing sidewalls of adjacent tiles 22 is only 0.02 inches to 0.03 inches.
- the barrier of the invention overcomes the shattering problem of prior art transparent barriers.
- the polygonal configuration of the tiles 12 is preferred to enable the tiles to be positioned in close proximity to each other, other configurations of tiles are possible in the general concept of the invention.
- the foundation of the transparent barrier of the invention also comprises a first layer of transparent resin 26 formed in a sheet adjoining one side of the layer of the plurality of transparent tiles 12 encapsulated in the transparent polyurethane 14 .
- the resin is preferably polycarbonate.
- This first layer of transparent polycarbonate 26 is positioned on a side of the tile 12 and polyurethane 14 layer that would serve as the exterior surface of the transparent barrier in use.
- Other alternate materials to this first layer of polycarbonate 26 include polyurethane and polymethylmethacrylate. However, the polycarbonate is preferred in this layer 26 .
- a second layer of transparent resin 28 is formed in a sheet adjoining the opposite side of the layer of the plurality of tiles 12 and the polyurethane 14 from the first polycarbonate layer 26 .
- the resin is preferably polycarbonate.
- Alternate materials include polyurethane and polymethylmethacrylate.
- a layer of transparent glass fibers 34 encapsulated in a resin 36 is formed as a reinforcing sheet that adjoins the second transparent polycarbonate layer 28 .
- the glass fibers in polyurethane in this layer are preferred, however other alternate materials include polycarbonate fiber in a polyurethane matrix.
- This glass fiber 34 and polyurethane 36 layer reinforces the transparent barrier 10 .
- a third transparent resin layer 42 is formed in a sheet adjoining the glass fiber 34 and polyurethane 36 layer.
- this third transparent resin layer 42 is a polycarbonate layer. This sandwiches the laminates of the barrier between the first transparent polycarbonate layer 26 and the third transparent polycarbonate layer 42 .
- the first transparent polycarbonate layer 26 and the third transparent layer 42 can be polished to provide the layer with transparent durable coating layers on both internal and external surfaces of the barrier. This gives the barrier an aquarium effect for optical clarity.
- the exterior surface of the barrier 10 is provided with a coated disposable rock resistant sacrificial layer 46 .
- this exterior layer 46 of the transparent barrier has a polysiloxane base with a vacuum deposited synthetic diamond top coating.
- Alternate materials include polysiloxane, polyurethane, polymethylmethacrylate, and melamine. This exterior layer 46 protects the other layers of the laminate barrier 10 against scratching and chipping from rocks and other similar materials.
- the barrier 10 of the invention constructed in the manner described above provides a novel transparent armor that has a truly transparent tile system.
- the index of refraction matching between the tiles 12 and the encapsulating polyurethane 14 are the foundation of the transparent barrier.
- the barrier 10 is also the first to use transparent optic fiber 34 and encapsulating polyurethane 36 as a reinforcement in the barrier.
- the barrier 10 of the invention described above achieves the objectives of providing a blast and ballistic projectile resistant transparent barrier that has excellent performance in all of the desired properties including multi-hit capability, low weight per area, reduced thickness per area, resistance to breakage or cracking, improved light transmittance, and low manufacturing cost.
Abstract
Description
- This patent application claims the benefit of provisional patent application No. 60/814,521, filed on Jun. 15, 2006.
- 1. Field of the Invention
- The present invention pertains to a projectile resistant barrier, and in particular a transparent blast or ballistic projectile resistant barrier. The barrier is comprised of a two-dimensional array of hardened tiles that are encapsulated in a resin layer. In the preferred embodiment the hardened tiles are transparent ceramic tiles, and the resin layer is transparent polyurethane. Additional transparent polycarbonate layers and glass fiber layers are also employed in the preferred embodiment.
- 2. Description of the Related Art
- In the prior art construction of transparent blast and ballistic resistant barriers (i.e., bulletproof glass), the transparent barriers have been comprised of laminates made up of multiple layers of glass, of plastic, or of combinations of glass and plastic layers. These transparent barrier laminates provide protection against various threats based mainly on the thickness of the laminates.
- However, this prior construction of transparent barriers has many disadvantages. These disadvantages include the inability of the transparent barriers to stop multiple projectiles or multiple fragments hitting the barriers in close proximity to each other. Each projectile or fragment hitting the transparent barrier typically shatters an area of the barrier. With multiple hits to the transparent barrier, the multiple shattered areas of the barrier can eliminate the ability to see through the barrier. These prior art transparent armor barriers constructed of multiple layers of transparent materials are also disadvantaged in that they have a significant weight for the size of the barrier. In addition, an effective transparent barrier has an excessive thickness, and the multiple layers of the transparent materials reduce the optical quality of the transparent barrier by reducing the light transmitted through the multiple layers.
- One of the optimal prior art transparent armor barriers includes an exterior layer or an initial layer of a very hard transparent ceramic material. This material is layered over a conventional glass or plastic backing layer. This design of transparent armor barrier has a reduced weight to area ratio, a reduced thickness to area ratio, and has improved light transmittance properties. However, this design of transparent armor barrier still has the disadvantages of multiple projectile hits on the barrier producing multiple shatter patterns that can effectively eliminate the ability to see through the barrier. In addition, this type of barrier typically has a substantial manufacturing cost in producing a transparent barrier of any practical size.
- The transparent blast and ballistic projectile resistant barrier of the present invention overcomes the disadvantages associated with the prior art transparent armor barriers discussed above. The transparent barrier of the present invention is basically comprised of a plurality of transparent hardened tiles that are arranged side-by-side in a two-dimensional array and are encapsulated in a transparent resin. The index of refraction of the tiles and index of refraction of the resin is the same, which enables a person to view through the transparent barrier without perceiving the existence of the hardened tiles in the barrier. In the preferred embodiment, the transparent tiles are ceramic tiles and the transparent resin is polyurethane. In addition, in the preferred embodiment multiple layers of a transparent polycarbonate are adjoined to opposite surfaces of the plurality of tile and polyurethane layer, and a layer of glass fibers encapsulated in polyurethane reenforces the layer of the plurality of ceramic tiles and encapsulating urethane.
- The encapsulated transparent ceramic tiles in the transparent blast and ballistic projectile resistant barrier limits any damage due to a projectile hitting the barrier to the tile hit by the projectile. The polyurethane encapsulating the tile limits the progression of damage due to a projectile hit from being transferred to adjacent tiles. This overcomes the shattering problem of prior art transparent armor barriers. In addition, by matching the light refraction index of the transparent ceramic tiles to the light refraction index of the urethane encapsulating the tiles, the interface between the transparent tiles and the transparent polyurethane is effectively invisible, giving the overall construction of the transparent armor barrier the required optical clarity.
- Thus, the transparent armor barrier of the invention provides a transparent barrier that has excellent performance in all of the desired properties including, a multi-hit capability, low weight, reduced thickness, resistant to breakage or cracking, improved light transmittance and low cost.
- Further features of the invention are set forth in the following detailed description of the preferred embodiments of the invention, and in the drawing figures.
-
FIG. 1 shows a schematic representation of the plurality of hard ceramic tiles encapsulated in the polyurethane layer of the invention. -
FIG. 2 is a view similar to that ofFIG. 1 , but showing a different arrayed arrangement of the hard tiles in the urethane layer. -
FIG. 3 is a view similar to that ofFIG. 1 , but showing a different arrangement and configuration of the hard tiles in the polyurethane layer. -
FIG. 4 is a view similar toFIG. 1 , but showing a different arrangement and configuration of the hard tiles in the polyurethane layer. -
FIG. 5 is a schematic representation of a cross-section of the transparent blast and ballistic projectile resistant barrier of the invention. - In the preferred embodiment of the invention, the blast and
ballistic projectile barrier 10 of the invention is designed as a transparent barrier. However, it should be kept in mind that the same concept of the invention can be employed in constructing an opaque barrier having the same basic construction of the invention. The foundation of the system is in a plurality ofhard tiles 12 encapsulated in a layer ofresin 14. Together, the layer oftiles 12 encapsulated in theresin 14 are formed as a sheet. In the preferred embodiment of the invention, thetiles 12 are formed of a hard transparent material and are encapsulated in a hardenedtransparent resin layer 14. The index of refraction of both thetransparent tiles 12 and theresin layer 14 is the same, enabling a person to view through the barrier formed by the hardenedtiles 12 and theresin layer 14 without the interface of the tiles in the layer of resin affecting the person's vision. As stated earlier, if a transparent barrier is not needed, thetiles 12 and the resin encapsulatinglayer 14 can be opaque materials. - In the preferred embodiment, the plurality of hardened
transparent tiles 12 are transparent ceramic tiles having a high aluminum oxide content. Alternative materials include borosilicate glass, any high strength glass, any glass containing ceramic compounds, or yttrium. In the preferred embodiment of the invention, the transparentceramic tiles 12 are pressed or shaped tiles that do not require grinding or polishing. Theresin 14 encapsulating thetransparent tiles 12 is preferably polyurethane. Alternate materials include polymethylmethacrylate, polysiloxane, and silicone. Preferably, each of thetiles 12 has a flat, parallel,front 16 and back 18 surface. Thetiles 12 are also formed withflat sidewalls 22 that are arranged in a polygonal configuration. -
FIGS. 1-4 show various different possible configurations of the plurality oftiles 12. The arrangements of thetiles 12 shown inFIGS. 1-4 are schematic representations.FIG. 1 shows the plurality oftiles 12, each having a square or cube configuration. Thetiles 12 are arranged in a two-dimensional arrayed layer of rows and columns. -
FIG. 2 shows a similar arrangement of thetiles 12 to that ofFIG. 1 , with thetiles 12 arranged in rows, but not aligned in columns. -
FIG. 3 shows an embodiment where thetile sidewalls 12 have triangular configurations. -
FIG. 4 shows an embodiment where thetiles 12 havesidewalls 22 with rectangular configurations and with square configurations. -
FIGS. 1-4 illustrate the possibility of using a plurality oftiles 12 in the invention where the configurations of the tiles are varied. However, in the preferred embodiment of the invention, thetile sidewalls 22 give the tile a polygonal configuration. This enables the tiles to be arranged in a two-dimensional array, where the spacing between adjacent tiles is minimized. The spacing between adjacent tiles in each ofFIGS. 1-4 is exaggerated. In the preferred embodiment, the plurality oftiles 12 are arranged in a single two-dimensional layer with opposing sidewalls ofadjacent tiles 22 being in close proximity to each other. In the preferred embodiment the spacing between the opposing sidewalls ofadjacent tiles 22 is only 0.02 inches to 0.03 inches. This allows sufficient spacing between adjacent tiles for the polyurethane encapsulating thetiles 12 to extend between the opposingsidewalls 22 of adjacent tiles. Thepolyurethane 14 separating theadjacent tiles 12 in this manner provides a cushion between adjacent tiles that enables any impact damage due to a projectile striking a tile of the barrier to be isolated to that tile, and not propagate to adjacent tiles. In this manner, the barrier of the invention overcomes the shattering problem of prior art transparent barriers. Although the polygonal configuration of thetiles 12 is preferred to enable the tiles to be positioned in close proximity to each other, other configurations of tiles are possible in the general concept of the invention. - The foundation of the transparent barrier of the invention also comprises a first layer of
transparent resin 26 formed in a sheet adjoining one side of the layer of the plurality oftransparent tiles 12 encapsulated in thetransparent polyurethane 14. The resin is preferably polycarbonate. This first layer oftransparent polycarbonate 26 is positioned on a side of thetile 12 andpolyurethane 14 layer that would serve as the exterior surface of the transparent barrier in use. Other alternate materials to this first layer ofpolycarbonate 26 include polyurethane and polymethylmethacrylate. However, the polycarbonate is preferred in thislayer 26. - A second layer of
transparent resin 28 is formed in a sheet adjoining the opposite side of the layer of the plurality oftiles 12 and thepolyurethane 14 from thefirst polycarbonate layer 26. As in the firsttransparent polycarbonate layer 26, the resin is preferably polycarbonate. Alternate materials include polyurethane and polymethylmethacrylate. - A layer of
transparent glass fibers 34 encapsulated in aresin 36, preferably a polyurethane matrix, is formed as a reinforcing sheet that adjoins the secondtransparent polycarbonate layer 28. The glass fibers in polyurethane in this layer are preferred, however other alternate materials include polycarbonate fiber in a polyurethane matrix. Thisglass fiber 34 andpolyurethane 36 layer reinforces thetransparent barrier 10. - A third
transparent resin layer 42 is formed in a sheet adjoining theglass fiber 34 andpolyurethane 36 layer. In the preferred embodiment, this thirdtransparent resin layer 42 is a polycarbonate layer. This sandwiches the laminates of the barrier between the firsttransparent polycarbonate layer 26 and the thirdtransparent polycarbonate layer 42. The firsttransparent polycarbonate layer 26 and the thirdtransparent layer 42 can be polished to provide the layer with transparent durable coating layers on both internal and external surfaces of the barrier. This gives the barrier an aquarium effect for optical clarity. - In the preferred embodiment, the exterior surface of the
barrier 10 is provided with a coated disposable rock resistantsacrificial layer 46. In the preferred embodiment, thisexterior layer 46 of the transparent barrier has a polysiloxane base with a vacuum deposited synthetic diamond top coating. Alternate materials include polysiloxane, polyurethane, polymethylmethacrylate, and melamine. Thisexterior layer 46 protects the other layers of thelaminate barrier 10 against scratching and chipping from rocks and other similar materials. - The
barrier 10 of the invention constructed in the manner described above provides a novel transparent armor that has a truly transparent tile system. The index of refraction matching between thetiles 12 and the encapsulatingpolyurethane 14 are the foundation of the transparent barrier. Thebarrier 10 is also the first to usetransparent optic fiber 34 and encapsulatingpolyurethane 36 as a reinforcement in the barrier. Thebarrier 10 of the invention described above achieves the objectives of providing a blast and ballistic projectile resistant transparent barrier that has excellent performance in all of the desired properties including multi-hit capability, low weight per area, reduced thickness per area, resistance to breakage or cracking, improved light transmittance, and low manufacturing cost. - Although the transparent barrier of the invention has been described above by reference to specific embodiments, it should be understood that modifications and variations could be made to the barrier with departing from the intended scope of protection provided by the following claims.
Claims (28)
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US11/735,696 US7861638B1 (en) | 2006-06-15 | 2007-04-16 | Transparent blast and ballistic projectile resistant barrier |
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US81452106P | 2006-06-15 | 2006-06-15 | |
US11/735,696 US7861638B1 (en) | 2006-06-15 | 2007-04-16 | Transparent blast and ballistic projectile resistant barrier |
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US20100330341A1 true US20100330341A1 (en) | 2010-12-30 |
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Cited By (6)
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WO2012145664A1 (en) * | 2011-04-22 | 2012-10-26 | Schott Corporation | Light weight temperature resistant transparent laminate structure |
WO2014140531A1 (en) * | 2013-03-13 | 2014-09-18 | Np Aerospace Limited | Vehicle armour |
EP2500683A3 (en) * | 2011-03-16 | 2015-04-29 | CeramTec-Etec GmbH | Transparent ballistics protection system |
EP3128282A2 (en) | 2015-08-05 | 2017-02-08 | Franco Correzzola | Security fence assembly method for ballistic purposes |
US20170316871A1 (en) * | 2016-04-29 | 2017-11-02 | Trench Limited - Trench Group Canada | Intergrated barrier for protecting the coil of air core reactor from projectile attack |
WO2019038720A1 (en) | 2017-08-23 | 2019-02-28 | Agp America S.A. | Transparent multi-hit armor |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8267001B2 (en) * | 2006-12-04 | 2012-09-18 | Battelle Memorial Institute | Composite armor and method for making composite armor |
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WO2014145681A1 (en) * | 2013-03-15 | 2014-09-18 | Battelle Memorial Institute | Armor system with multi-hit capacity and method of manufacture |
Citations (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3380406A (en) * | 1965-04-28 | 1968-04-30 | Whittaker Corp | Composite design for transparent armour |
US3509833A (en) * | 1963-03-28 | 1970-05-05 | Goodyear Aerospace Corp | Hard faced ceramic and plastic armor |
US3573150A (en) * | 1968-07-24 | 1971-03-30 | Us Army | Transparent armor |
US3637578A (en) * | 1968-01-23 | 1972-01-25 | Fmc Corp | Polyester-polyphenylene ether mixed resins |
US3700534A (en) * | 1963-03-28 | 1972-10-24 | Goodyear Aircraft Corp | Hard faced plastic armorplate |
US4911061A (en) * | 1989-03-22 | 1990-03-27 | General Dynamics Land Systems, Inc. | Composite ceramic armor and method for making same |
US4911969A (en) * | 1986-07-09 | 1990-03-27 | Yamaha Corporation | Decorative sheet and method of manufacturing the same |
US5326606A (en) * | 1992-08-12 | 1994-07-05 | Armorvision Plastics & Glass | Bullet proof panel |
USH1519H (en) * | 1966-01-24 | 1996-03-05 | The United States Of America As Represented By The Secretary Of The Army | Transparent ceramic composite armor |
USH1567H (en) * | 1967-09-07 | 1996-08-06 | The United States Of America As Represented By The Secretary Of The Army | Transparent ceramic armor |
US5665450A (en) * | 1992-08-21 | 1997-09-09 | The Curators Of The University Of Missouri | Optically transparent composite material and process for preparing same |
US5705764A (en) * | 1996-05-30 | 1998-01-06 | United Defense, L.P. | Interlayer for ceramic armor |
US6408734B1 (en) * | 1998-04-14 | 2002-06-25 | Michael Cohen | Composite armor panel |
US20030110932A1 (en) * | 2000-05-11 | 2003-06-19 | Michael Mohr | Armor-plating composite |
US20040083880A1 (en) * | 2002-09-19 | 2004-05-06 | Michael Cohen | Ceramic bodies and ballistic armor incorporating the same |
US20070068375A1 (en) * | 2005-06-10 | 2007-03-29 | Saint-Gobain Ceramics & Plastics, Inc | Transparent ceramic composite |
US7300893B2 (en) * | 2004-06-10 | 2007-11-27 | The United States Of America As Represented By The Secretary Of The Navy | Armor including a strain rate hardening elastomer |
US20070283801A1 (en) * | 2006-06-09 | 2007-12-13 | Armorsmith Company | Armor apparatus and method |
US20080190278A1 (en) * | 2006-07-27 | 2008-08-14 | Chad Brian Martin | Vehicle security partition |
US20090217813A1 (en) * | 2007-03-21 | 2009-09-03 | John Carberry | Glass-Ceramic with laminates |
US20090320676A1 (en) * | 2003-10-28 | 2009-12-31 | Strike Face Technology Incorporated | Ceramic armour and method of construction |
US20090320675A1 (en) * | 2007-04-23 | 2009-12-31 | Landingham Richard L | Mosaic Transparent Armor |
US20100031810A1 (en) * | 2006-11-16 | 2010-02-11 | Neal Murray L | Transparent ballistic resistant armor |
-
2007
- 2007-04-16 US US11/735,696 patent/US7861638B1/en not_active Expired - Fee Related
Patent Citations (28)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3509833A (en) * | 1963-03-28 | 1970-05-05 | Goodyear Aerospace Corp | Hard faced ceramic and plastic armor |
US3700534A (en) * | 1963-03-28 | 1972-10-24 | Goodyear Aircraft Corp | Hard faced plastic armorplate |
US3380406A (en) * | 1965-04-28 | 1968-04-30 | Whittaker Corp | Composite design for transparent armour |
USH1519H (en) * | 1966-01-24 | 1996-03-05 | The United States Of America As Represented By The Secretary Of The Army | Transparent ceramic composite armor |
USH1567H (en) * | 1967-09-07 | 1996-08-06 | The United States Of America As Represented By The Secretary Of The Army | Transparent ceramic armor |
US3637578A (en) * | 1968-01-23 | 1972-01-25 | Fmc Corp | Polyester-polyphenylene ether mixed resins |
US3573150A (en) * | 1968-07-24 | 1971-03-30 | Us Army | Transparent armor |
US4911969A (en) * | 1986-07-09 | 1990-03-27 | Yamaha Corporation | Decorative sheet and method of manufacturing the same |
US4911061A (en) * | 1989-03-22 | 1990-03-27 | General Dynamics Land Systems, Inc. | Composite ceramic armor and method for making same |
US5326606A (en) * | 1992-08-12 | 1994-07-05 | Armorvision Plastics & Glass | Bullet proof panel |
US5665450A (en) * | 1992-08-21 | 1997-09-09 | The Curators Of The University Of Missouri | Optically transparent composite material and process for preparing same |
US5705764A (en) * | 1996-05-30 | 1998-01-06 | United Defense, L.P. | Interlayer for ceramic armor |
US6408734B1 (en) * | 1998-04-14 | 2002-06-25 | Michael Cohen | Composite armor panel |
US20030110932A1 (en) * | 2000-05-11 | 2003-06-19 | Michael Mohr | Armor-plating composite |
US20040083880A1 (en) * | 2002-09-19 | 2004-05-06 | Michael Cohen | Ceramic bodies and ballistic armor incorporating the same |
US6860186B2 (en) * | 2002-09-19 | 2005-03-01 | Michael Cohen | Ceramic bodies and ballistic armor incorporating the same |
US20090320676A1 (en) * | 2003-10-28 | 2009-12-31 | Strike Face Technology Incorporated | Ceramic armour and method of construction |
US7300893B2 (en) * | 2004-06-10 | 2007-11-27 | The United States Of America As Represented By The Secretary Of The Navy | Armor including a strain rate hardening elastomer |
US20070068376A1 (en) * | 2005-06-10 | 2007-03-29 | Saint-Gobain Ceramics & Plastics, Inc. | Transparent ceramic composite |
US7584689B2 (en) * | 2005-06-10 | 2009-09-08 | Saint-Gobain Ceramics & Plastics, Inc. | Transparent ceramic composite armor |
US20090308239A1 (en) * | 2005-06-10 | 2009-12-17 | Saint-Gobain Ceramics & Plastics | Transparent Ceramic Composite |
US20070068375A1 (en) * | 2005-06-10 | 2007-03-29 | Saint-Gobain Ceramics & Plastics, Inc | Transparent ceramic composite |
US20070283801A1 (en) * | 2006-06-09 | 2007-12-13 | Armorsmith Company | Armor apparatus and method |
US20080190278A1 (en) * | 2006-07-27 | 2008-08-14 | Chad Brian Martin | Vehicle security partition |
US20100031810A1 (en) * | 2006-11-16 | 2010-02-11 | Neal Murray L | Transparent ballistic resistant armor |
US7681485B2 (en) * | 2006-11-16 | 2010-03-23 | American Development Group International, Llc | Transparent ballistic resistant armor |
US20090217813A1 (en) * | 2007-03-21 | 2009-09-03 | John Carberry | Glass-Ceramic with laminates |
US20090320675A1 (en) * | 2007-04-23 | 2009-12-31 | Landingham Richard L | Mosaic Transparent Armor |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2500683A3 (en) * | 2011-03-16 | 2015-04-29 | CeramTec-Etec GmbH | Transparent ballistics protection system |
WO2012145664A1 (en) * | 2011-04-22 | 2012-10-26 | Schott Corporation | Light weight temperature resistant transparent laminate structure |
US10046540B2 (en) | 2011-04-22 | 2018-08-14 | Oran Safety Glass Inc. | Light weight temperature resistant transparent laminate structure |
WO2014140531A1 (en) * | 2013-03-13 | 2014-09-18 | Np Aerospace Limited | Vehicle armour |
US9846013B2 (en) | 2013-03-13 | 2017-12-19 | Np Aerospace Limited | Vehicle armour |
EP3128282A2 (en) | 2015-08-05 | 2017-02-08 | Franco Correzzola | Security fence assembly method for ballistic purposes |
US20170316871A1 (en) * | 2016-04-29 | 2017-11-02 | Trench Limited - Trench Group Canada | Intergrated barrier for protecting the coil of air core reactor from projectile attack |
US11101068B2 (en) * | 2016-04-29 | 2021-08-24 | Trench Limited—Trench Group Canada | Integrated barrier for protecting the coil of air core reactor from projectile attack |
WO2019038720A1 (en) | 2017-08-23 | 2019-02-28 | Agp America S.A. | Transparent multi-hit armor |
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