WO1994024894A1 - Flexible sheet material - Google Patents
Flexible sheet material Download PDFInfo
- Publication number
- WO1994024894A1 WO1994024894A1 PCT/GB1994/000472 GB9400472W WO9424894A1 WO 1994024894 A1 WO1994024894 A1 WO 1994024894A1 GB 9400472 W GB9400472 W GB 9400472W WO 9424894 A1 WO9424894 A1 WO 9424894A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- plate
- plates
- flexible material
- periphery
- edge wall
- Prior art date
Links
Classifications
-
- 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
- F41H1/00—Personal protection gear
- F41H1/02—Armoured or projectile- or missile-resistant garments; Composite protection fabrics
-
- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D31/00—Materials specially adapted for outerwear
- A41D31/04—Materials specially adapted for outerwear characterised by special function or use
- A41D31/24—Resistant to mechanical stress, e.g. pierce-proof
- A41D31/245—Resistant to mechanical stress, e.g. pierce-proof using layered materials
-
- 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
Definitions
- This invention relates to a flexible sheet material.
- the invention will be described with particular reference to a sheet material suitable for use as a body armour, for example to resist penetration by a knife blade or a projectile.
- the flexible material may be used in a wide variety of other circumstances and for other purposes and should not be regarded as being limited to a material solely for use as a body armour.
- Body armour To protect the wearer against injury either from a knife attack or from a projectile fired from a firearm, air-pistol, cross-bow or the like.
- armour must be flexible to give the user freedom of movement and should be gas permeable to reduce condensation during protracted use.
- Body armour often is in the form of a garment made from or containing a material resistant to penetration and usually protects the torso, though other designs of body armour may protect the limbs as well.
- a flexible sheet material comprising a plurality of relatively rigid closely-juxtaposed discrete plates all lying in substantially the same plane when the material is laid out flat, the periphery of each of which plates both interfits and interlocks with the peripheries of each of the neighbouring plates and the edge walls of each plate co-operating with those of the neighbouring plates to resist relative separation of the plates in the direction normal to the general plane of the material.
- the sheet material of this invention has all the plates thereof lying in substantially the same plane and so not overlapping, unlike many previous designs of such materials. As such, the thickness of the material may be much reduced, so making it significantly easier to incorporate in a garment such as a vest or jacket.
- a part of the length of the periphery of one plate may have an edge wall profile of a convex or of a V- shape, and the part of the periphery of a neighbouring plate which interfits and interlocks therewith may have an edge wall profile of a complementary concave shape or of an inverted V-shape, as appropriate.
- the edge walls may be defined by bevels which meet substantially on the centre plane of the thickness of each plate.
- each plate is based on a polygon which, in the case of a two-dimensional sheet, may have an even number of sides.
- the polygon has a sufficient number of sides, then separation of the plates in a direction normal to the principal surfaces of a plate may be prevented by a part of the length of the periphery of one plate having an edge wall profile lying at an acute angle to one surface of the plate and another part of the length of the periphery lying at an obtuse angle to said one surface of the plate, the parts of the peripheries of the neighbouring plates which interfit and interlock therewith having their respective edge profile parts of complementary forms.
- the periphery of any one plate may have successive edge walls of the polygon on which that plate is based lying alternately at acute and obtuse angles, respectively.
- adjacent plates may be relieved to from an opening through the sheet material, preferably of circular shape.
- a plug may then be fitted in that opening, the plug having an enlarged head on each side of the sheet material, which head overlies the marginal regions of the plates around the opening.
- each plate may have at least one plane of symmetry perpendicular to the surface of the plate but preferably each plate is of the same shape, in plan, as all of the other plates.
- the sheet material when in its 'natural' position, to have a three-dimensional curvature.
- each plate may be formed from a substance appropriate for the purpose for which the sheet material is to be put.
- the substance may be selected from titanium, aluminium, steel, a ceramic, a thermo-setting or thermoplastics material, a filled or reinforced thermo-setting or thermoplastics material, wood, laminated wood, and a composition of fibrous material and a resin system, or a combination of these substances.
- each plate which is expected to receive an impact may be given an appropriate finish to minimise the effect of that impact.
- the surface of each plate which, in use, is intended to face outwardly may have a surface finish of valleys and ridges formed therein. This is likely to reduce the likelihood of an impacting projectile sliding across the surface.
- Other surface finishes may assist in distorting a projectile at the point of impact in such a way as to allow a reduction in the overall thickness of a piece of body armour.
- the plates may be made by a technigue adapted for the substance being worked to from the plates - for example, individually by an injection moulding process, or by cutting the plates from a sheet of material. In the case of cutting, this may be performed by a water cutting-jet, a laser cutter, an electron beam cutter, a sonic cutter or some other non-contact cutting process.
- Another possibility would be to manufacture each plate from two or more separate parts, each formed by a suitable process such as machining, casting or forging, and then welding or otherwise fusing the plate-parts together once a sheet has been assembled from a plurality of such plate-parts.
- Yet another possibility would be to form the plates from a sheet of material by an etching process or by chemically leeching the material of the sheet away from a joint region between two plates.
- Such a cutting step may be performed to furnish the plates interlocked together, without the individual plates being separated one from the others.
- Such a cutting step may be performed by one of the processes mentioned above.
- Figure 1 is a plan view of a first embodiment of a flexible sheet material of this invention
- Figure 2 is a sectional view taken on line II-II marked on Figure 1;
- Figure 3 is a plan view on an alternative plate element for use in constructing a sheet material of this invention;
- Figures 4A and 4B are part sectional views on the plate of Figure 3, taken respectively on lines A-A and B-B;
- Figure 5 is a plan view on part of a sheet material consisting of a plurality of plates each as shown in Figure 3;
- Figure 6 is a plan view of a further embodiment of sheet material of this invention, utilising modified plate elements which are nevertheless generally as shown in Figures 3 and 4;
- Figure 7 is a cross-sectional view taken on line VII-VII marked on Figure 6;
- Figure 8 is a plan view of two moulded plate-parts which may be joined to form a single plate;
- Figure 9 is a plan view on part of a sheet material made from a plurality of plates each of each has two plate-parts as shown in Figure 8, fused together.
- FIG. 1 and 2 there is shown a sheet material in the form of a co-planar layer of individual plates 10 each based on a rectangle (in plan view) but having a pair of necked projections 11 formed on one opposed pair of sides 12 and 13 and having a pair of re-entrant recesses 14 formed in the other opposed pair of sides 15 and 16.
- Each plate 10 is thus similar in form to a conventional jigsaw puzzle piece of a relatively non-complex shape.
- Two side walls 12 and 15 are bevelled from the top and bottom, so as to have an edge wall profile of a V-shape, the bevels meeting on the centre plane 17 of the thickness of the plate and being formed at substantially the same angle to the planes of the top and bottom surfaces 18 and 19 of the plate.
- the other two side walls 13 and 16 are formed in a complementary manner to the side walls 12 and 15, and thus these side walls also have a V-shape, but inverted so that the top and bottom surfaces of the plate project further than the material of the plate at the centre plane of the thickness of the plate.
- An assemblage of plates as described above reguires at least three different designs of plate, ignoring plates at the edge region of the sheet, all similar but differing detail insofar as the edge wall profile of one side of a given plate has to match the edge wall profile in a complementary manner of the side of the next adjacent plate with which the side of the first-mentioned plate interfits and interlocks.
- the clearances must be very closely controlled, in order to achieve the interlocking and separation- resistance described above.
- the clearances between the profiles of two adjacent plates, respectively on a side having a necked projection and on a side having a re-entrant recess are such that the projecting V-shaped side may slide past the top or bottom surface of the next adjacent plate, interlocking will not be achieved.
- the clearance K between adjacent plates must be less than dimension A, as marked on Figure 2.
- the sheet material may display flexibility and so have the capability of being curved in at least two dimensions, there must be a minimum clearance between the plates in order to allow each plate to move slightly out of a strictly co-planar disposition, with respect to its neighbouring plates.
- the material has a nominal thickness of about 6 mm
- the length of each side of the rectangle on which each plate is based may be about 15 mm
- the projection of the centre plane on sides 12 and 15 beyond the top and bottom surfaces 18 and 19 of the plate (dimension A) is about 3 mm.
- the clearance K between the plates must be not less than 0.24 mm - but in order to give adequate security of interlocking, should be at least 50% less than dimension A.
- the material is formed as two separate sheets each consisting of a plurality of essentially identical (in plan view) plates, but with the edge walls defined by cuts extending right through the material and lying at a non-perpendicular angle to the surface of the sheet.
- the angle of cut of any one edge of a given plate in one sheet is in the opposite sense to the angle of cut of the corresponding edge of the corresponding plate in the other sheet.
- the two sheets may be manufactured either by individually forming plates and then assembling those plates together; or the plates may be formed by cuts made in a sheet of material without those plates being separated one from another, provided that the cutting can be performed with a sufficiently high degree of accuracy and with a sufficiently narrow kerf.
- a single sheet of material is cut from both sides to form the individual plates, the cutting being performed so that the two cuts meet on the centre plane of the sheet and the cutting device performing the cutting in such a way that the cut edges have the V-shaped profiles, shown in Figure 2.
- Such cutting may be performed by means of a water cutting process, where an extremely fine jet of water is fired at the sheet, under a very high pressure and in a highly controlled manner, or by a laser cutting process.
- Such cutting processes are known and understood in the art and form no part of the present invention; they will not therefore be described in any detail here.
- Figures 3 to 5 show an alternative design of sheet material utilising the principles described above with reference to Figures 1 and 2.
- each individual plate 20 is based on a hexagon and the side edges are cut in such a way that the plates are all identical and yet the material comprised by the plurality of interlocking plates displays the same characteristics as have been described above.
- FIG 3 the hexagon on which the plate is based is shown by lines 21 to 26 inclusive and it can be seen that the sides of the plate alternately have necked projections 27 and re-entrant recesses 28, of complementary forms.
- This plate profile allows adjacent plates to interlock as shown in Figure 5 and separation of the plates in the plane of the material is resisted by the projections and recesses 27 and 28 respectively interlocking. Separation in a direction normal to the plane of the material is resisted by the profile of the edges of each plate, which, on the adjacent interlocking portions, are of complementary forms.
- Figure 4A shows the profile of the edge portions of the plates on those sides which are provided with the necked projections 27 and it can be seen that these are cut with an obtuse angle a between the top face 29 and the side edge 30; on Figure 3, these edges are marked with the symbol +.
- the transitional edge regions between those indicated with + and - symbols extend essentially perpendicularly to the faces of the plate, and are marked with the symbol o.
- the clearance between adjacent plates must be sufficient to allow the material to be flexed out of a strictly co-planar configuration, but the clearance must be less than (t/tan ⁇ ) where t is the thickness of the plate material.
- a typical embodiment of sheet material as shown in Figures 3 to 5 may consist of a polyester or epoxy resin system reinforced with aramid fibres.
- the side of the hexagon on which each plate is based may be in the range of 5 to 25 mm with the material thickness being about 6 mm.
- the plates are cut from a piece of the material without the plates being separated therefrom, for example by means of a high pressure water jet cutting technique or by laser cutting, as has been mentioned above.
- FIG. 6 & 7 there is shown another embodiment of sheet material of this invention, constructed from a modified form of plate.
- Each of the plates 35 is generally similar to the plates 20 of the embodiment shown in Figures 3 and 4 and so will not be described again in detail here.
- the material of the plate has been cut away at 36 so that three adjoining plates together define a circular hole extending through the thickness of the material.
- a rivet 37 having an enlarged rounded head 38 on each side of the sheet material, which rivet 37 is a lose fit in the hole, as illustrated in Figure 7.
- the rivets may also be made of the same material, or could be made from hardened steel.
- Figure 8 shows two separate plate-parts 40 and 41 which are manufactured separately but which may be joined together by a fusion technique so as to form a complete plate similar to that shown in Figure 3.
- Such plate-parts may be manufactured by machining, casting or forging techniques from suitable materials, so as to have appropriate edge profiles, as has been described above with reference to Figures 3 and 4.
- a plurality of the plate-parts may be assembled together as shown in Figure 8 and the two plate-parts of each plate are then welded or otherwise fused together along lines 42, for example by a laser welding technique, so as to form a complete, flexible sheet material of this invention. Provided that the welding is properly performed, the finished sheet material displays essentially the same characteristics as the material of Figure 5, consisting of plates 20 ( Figure 3).
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP94909178A EP0697824B1 (en) | 1993-05-05 | 1994-03-10 | Flexible sheet material |
DE69405988T DE69405988D1 (en) | 1993-05-05 | 1994-03-10 | FLEXIBLE THIN MATERIAL |
JP6523984A JPH08511861A (en) | 1993-05-05 | 1994-03-10 | Flexible sheet material |
AU62117/94A AU6211794A (en) | 1993-05-05 | 1994-03-10 | Flexible sheet material |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB939309486A GB9309486D0 (en) | 1993-05-05 | 1993-05-05 | Flexible sheet material |
GB9309486.0 | 1993-05-05 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1994024894A1 true WO1994024894A1 (en) | 1994-11-10 |
Family
ID=10735137
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB1994/000472 WO1994024894A1 (en) | 1993-05-05 | 1994-03-10 | Flexible sheet material |
Country Status (8)
Country | Link |
---|---|
EP (1) | EP0697824B1 (en) |
JP (1) | JPH08511861A (en) |
AT (1) | ATE158697T1 (en) |
AU (1) | AU6211794A (en) |
DE (1) | DE69405988D1 (en) |
GB (1) | GB9309486D0 (en) |
WO (1) | WO1994024894A1 (en) |
ZA (1) | ZA943096B (en) |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0955515A1 (en) * | 1998-05-04 | 1999-11-10 | Ziegler Mechanische Werkstatt, Metallgewebe und Arbeitsschutz GmbH | Fabric, in particular stab-resistant fabric |
WO2002035173A1 (en) * | 2000-10-26 | 2002-05-02 | The Secretary Of State For Defence | Ceramic tile armour |
US6836906B2 (en) | 2000-10-11 | 2005-01-04 | The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland | Eye protection device |
EP2071271A1 (en) * | 2006-10-04 | 2009-06-17 | CPE Production Oy | Bulletproof vest |
US7963204B2 (en) | 2007-07-24 | 2011-06-21 | Oshkosh Corporation | Stressed skin tiled vehicle armor |
WO2012146995A1 (en) * | 2011-04-27 | 2012-11-01 | Edan Administration Services (Ireland) Limited | Armor system |
CN104501659A (en) * | 2014-12-01 | 2015-04-08 | 上海圣甲安全防护科技有限公司 | Composite material for preparing flexible stab-resistant material and preparation method of stab-resistant material |
WO2015193735A1 (en) * | 2014-06-19 | 2015-12-23 | Revision Military S.À.R.L. | Wearable armor plate assembly |
US9322621B2 (en) | 2009-10-27 | 2016-04-26 | Edan Administration Services (Ireland) Limited | Armor system |
US9709363B2 (en) | 2012-09-23 | 2017-07-18 | Edan Administration Services (Ireland) Limited | Armor system |
CN109737817A (en) * | 2019-02-11 | 2019-05-10 | 东华大学 | A kind of tilting flexible puncture-proof material and preparation method thereof |
CN110057246A (en) * | 2019-05-06 | 2019-07-26 | 苏州高甲防护科技有限公司 | A kind of anti-stabbing lining structure of insertion slot type high security |
CN113237387A (en) * | 2021-05-10 | 2021-08-10 | 哈尔滨工业大学 | Anti-elastic aluminum-based composite material containing interlocking structure and preparation method thereof |
WO2023198422A1 (en) * | 2022-04-11 | 2023-10-19 | Industrie Bitossi S.P.A. | Bulletproof protective structure |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IL189088A0 (en) * | 2008-01-28 | 2009-05-04 | Rafael Advanced Defense Sys | Protective divide and method for protection |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3867239A (en) * | 1973-06-11 | 1975-02-18 | Us Army | Body armor construction |
GB2004177A (en) * | 1977-09-13 | 1979-03-28 | Elteka Kunststoff | Soft protective construction |
US4483020A (en) * | 1982-11-17 | 1984-11-20 | Jack P. Cittadine | Projectile proof vest |
EP0226265A1 (en) * | 1985-08-16 | 1987-06-24 | C. Itoh & Co., Ltd. | Human body protector |
WO1992016813A1 (en) * | 1991-03-12 | 1992-10-01 | Protection Products (International) Limited | Flexible body armour |
-
1993
- 1993-05-05 GB GB939309486A patent/GB9309486D0/en active Pending
-
1994
- 1994-03-10 AT AT94909178T patent/ATE158697T1/en active
- 1994-03-10 WO PCT/GB1994/000472 patent/WO1994024894A1/en active IP Right Grant
- 1994-03-10 EP EP94909178A patent/EP0697824B1/en not_active Expired - Lifetime
- 1994-03-10 JP JP6523984A patent/JPH08511861A/en active Pending
- 1994-03-10 AU AU62117/94A patent/AU6211794A/en not_active Abandoned
- 1994-03-10 DE DE69405988T patent/DE69405988D1/en not_active Expired - Lifetime
- 1994-05-05 ZA ZA943096A patent/ZA943096B/en unknown
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3867239A (en) * | 1973-06-11 | 1975-02-18 | Us Army | Body armor construction |
GB2004177A (en) * | 1977-09-13 | 1979-03-28 | Elteka Kunststoff | Soft protective construction |
US4483020A (en) * | 1982-11-17 | 1984-11-20 | Jack P. Cittadine | Projectile proof vest |
EP0226265A1 (en) * | 1985-08-16 | 1987-06-24 | C. Itoh & Co., Ltd. | Human body protector |
WO1992016813A1 (en) * | 1991-03-12 | 1992-10-01 | Protection Products (International) Limited | Flexible body armour |
Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0955515A1 (en) * | 1998-05-04 | 1999-11-10 | Ziegler Mechanische Werkstatt, Metallgewebe und Arbeitsschutz GmbH | Fabric, in particular stab-resistant fabric |
US6836906B2 (en) | 2000-10-11 | 2005-01-04 | The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland | Eye protection device |
WO2002035173A1 (en) * | 2000-10-26 | 2002-05-02 | The Secretary Of State For Defence | Ceramic tile armour |
EP2071271A1 (en) * | 2006-10-04 | 2009-06-17 | CPE Production Oy | Bulletproof vest |
EP2071271A4 (en) * | 2006-10-04 | 2012-10-17 | Cpe Production Oy | Bulletproof vest |
US7963204B2 (en) | 2007-07-24 | 2011-06-21 | Oshkosh Corporation | Stressed skin tiled vehicle armor |
US8402876B2 (en) | 2009-10-27 | 2013-03-26 | Edan Administration Services (Ireland) Limited | Ballistic lightweight ceramic armor with cross-pellets |
US9322621B2 (en) | 2009-10-27 | 2016-04-26 | Edan Administration Services (Ireland) Limited | Armor system |
WO2012146995A1 (en) * | 2011-04-27 | 2012-11-01 | Edan Administration Services (Ireland) Limited | Armor system |
US9709363B2 (en) | 2012-09-23 | 2017-07-18 | Edan Administration Services (Ireland) Limited | Armor system |
WO2015193735A1 (en) * | 2014-06-19 | 2015-12-23 | Revision Military S.À.R.L. | Wearable armor plate assembly |
CN104501659A (en) * | 2014-12-01 | 2015-04-08 | 上海圣甲安全防护科技有限公司 | Composite material for preparing flexible stab-resistant material and preparation method of stab-resistant material |
CN109737817A (en) * | 2019-02-11 | 2019-05-10 | 东华大学 | A kind of tilting flexible puncture-proof material and preparation method thereof |
CN110057246A (en) * | 2019-05-06 | 2019-07-26 | 苏州高甲防护科技有限公司 | A kind of anti-stabbing lining structure of insertion slot type high security |
CN113237387A (en) * | 2021-05-10 | 2021-08-10 | 哈尔滨工业大学 | Anti-elastic aluminum-based composite material containing interlocking structure and preparation method thereof |
CN113237387B (en) * | 2021-05-10 | 2022-08-05 | 哈尔滨工业大学 | Anti-elastic aluminum-based composite material containing interlocking structure and preparation method thereof |
WO2023198422A1 (en) * | 2022-04-11 | 2023-10-19 | Industrie Bitossi S.P.A. | Bulletproof protective structure |
Also Published As
Publication number | Publication date |
---|---|
GB9309486D0 (en) | 1993-06-23 |
ATE158697T1 (en) | 1997-10-15 |
AU6211794A (en) | 1994-11-21 |
DE69405988D1 (en) | 1997-11-06 |
ZA943096B (en) | 1995-01-26 |
EP0697824A1 (en) | 1996-02-28 |
EP0697824B1 (en) | 1997-10-01 |
JPH08511861A (en) | 1996-12-10 |
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