CA2000436A1 - Device for improving the resistance of structures to the impact of conventional projectiles - Google Patents
Device for improving the resistance of structures to the impact of conventional projectilesInfo
- Publication number
- CA2000436A1 CA2000436A1 CA002000436A CA2000436A CA2000436A1 CA 2000436 A1 CA2000436 A1 CA 2000436A1 CA 002000436 A CA002000436 A CA 002000436A CA 2000436 A CA2000436 A CA 2000436A CA 2000436 A1 CA2000436 A1 CA 2000436A1
- Authority
- CA
- Canada
- Prior art keywords
- concrete
- impact
- ribs
- projectile
- covering
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 239000002184 metal Substances 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 230000002787 reinforcement Effects 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 229910052729 chemical element Inorganic materials 0.000 claims 1
- 230000003014 reinforcing effect Effects 0.000 abstract 1
- 241000973252 Diagramma Species 0.000 description 1
- 241001307210 Pene Species 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/04—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate against air-raid or other war-like actions
Landscapes
- Architecture (AREA)
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Emergency Management (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Business, Economics & Management (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
- Building Environments (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
- Nitrogen Condensed Heterocyclic Rings (AREA)
- Control Of Electrical Variables (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
Abstract
ABSTRACT
Company called:
CAMPENON BERNARD
"Device for improving the resistance of structures to the impact of conventional projectiles"
(An invention of: Henri CHAPUS) The device allows the resistance of structures (2), in particular made of concrete, to the impact of conventional projectiles (1) to be improved.
It comprises a surface (3) formed by a succession of ribs and grooves with a substantially V-shaped profile and smooth, inclined lateral faces, the height (H) of the said ribs being sufficient and the said surface being sufficiently hard so as to deflect the projectile (1) after impact on an inclined lateral face (4) of a rib.
Use, in particular, for reinforcing concrete shelters.
(See Figure 2).
Company called:
CAMPENON BERNARD
"Device for improving the resistance of structures to the impact of conventional projectiles"
(An invention of: Henri CHAPUS) The device allows the resistance of structures (2), in particular made of concrete, to the impact of conventional projectiles (1) to be improved.
It comprises a surface (3) formed by a succession of ribs and grooves with a substantially V-shaped profile and smooth, inclined lateral faces, the height (H) of the said ribs being sufficient and the said surface being sufficiently hard so as to deflect the projectile (1) after impact on an inclined lateral face (4) of a rib.
Use, in particular, for reinforcing concrete shelters.
(See Figure 2).
Description
2~
The present invention relatQs to a device for improving ~he resistance of structures, in par~icular made of concrete, such as shelters, sheds t buildings, walls, paved surfaces, etc., to the Lmpact of conven-tional projec~ile~ such as bomb~ and ~hells~
These concrete structures usually have faces which are plane or have a large radius of curvature.
It is known that the effectiveness of projectiles hitting a concre~e structure is optLmum when ~heir angle of incidence, in other words the angle form~d by the relation between a vertical plane ~nd the plane face of the structure is close to 0. The concrete to be passed through is indeed thinnest at this 0 angle.
Projectiles are less effective for larger angles of incidence since the thicknes~ of the concrete in-creases. Above a certain value of the angle of incidence, the pro~ectiles can ricochet and their effectiveness then become~ zero.
The object of the present invention is to create a device which allows the effec~iveness of projectiles to be reduced and thus the resistance of structures to the impact of these pro~ectiles ~o be improved.
According to the i~Yention thi device compri~es a ~urface formed by a succession of ribs and grooves with a substantially V-shaped profile and smooth, inclined lateral faces, the height of the said ribs being suffi-cient and the said surface being sufficiently hard 80 as to deflect the projectile after Lmpact on an inclined lateral ~ace of a rib.
Becau~e tha lateral faces of the ~ubstantially V-shaped ribs are inclined relative to a plane which is perpendicular to the surface of the structure, when the pro~ectile strike~ thi~ surf~ace perpendicularly, it behaves in one or other of the following ways:~
- the head of the proiectile slide0 (ricochets) along the inclined lateral face and thus sets ofF a rotational movement which unbalance~ the pro~ectile and can lead to it:being destroyed;
:
- , .. : , ~, - the projectile first slides and then penetrates the concrete, but at an incidence greater than that which it had when it struck;
- the projectile is systematically directed towards a low point of the 3~ructure which has been reinforced, which reduces its penetration considerably.
According to an advantageous version of the invention, the said surface consists of a co~ering made of a metal which is harder than concrete, the inner faces of this covering being in contact with concrete.
This covering promotes the sliding of the projec-tile along the inclined face of the rib.
According to a preferred version of the i~ven-tion, the covering consists of a series of elements with a substantially inverted-V-Rhaped cross-section and which are connected to each other by their opposite longitudi-nal edges.
The~e elements are preferably made of s~eel, which allows the cos~ of the device according to the inventio~ to be reduced.
Other features and advantages o~ the inven~ion will also become evident in the description b~low.
In the attached drawings which are given by way of non-limi~ing examples - Figure 1 is a diagra~matic view of a projectile reaching a structure with a certain angle of incidence, - Figure 2 i~ a diagramma~ic ~ectional view o~ a protection device according to the invention showing a pro~ectile reaching : in a normal way the surface of the structure covered by the said devicQ, - Figure 3 i8 a view sLmilar to Figure 2 ~howing the pro~ectile upon impact on the device, - Figure 4 is a view similar to Figure 2 showing ths pro~ectile behaving in a different way, - Figure~5 i8 a~perspective view of the elements of the device according to the~invention with a ~ubstan-tially V-shaped~section~ ~ :
- Figu~e 6 i~a~diagrammatic ~ectional view of a preferred :ver~io~ of the device according to the ~ :
:
, ~ .
: . .~ . ~ ' . .
, -:
.
3Q4~6 invention, - Figur~ 7 and B are views similar to Figure 3, showins the behavior of a projectile reaching a ~tructure with a relatively substantial angle of incidence.
Figure 1 show~ a pro~ectile 1, for example a bomb, reachin~ the pla~e suxface of a concrete structure 2, such a~ a shelter, with an angle of incidence i.
The effectiveness of this projectile 1 is optimum when the angle i is equal to 0 (in other words when the pro~ectile reaches the surface of the structure in a normal way).
~he invention aims ~o reduce the effectiveness of the projec~ile 1 by Lmproving the resistance of the structure as regard~ the Lmpact of the pro~ectile.
Acc~rding to the invention, the device for improving the resistance of the concrete structure 2 comprises (see Figure~ 2 and 3) a surface 3 formed by a succes~ion of ribs and grooves with a ~ubstantially V-shaped profile and smooth, inclined lateral faces, the height H of the ~aid rib~ being ~ufficient and the said surface 3 being sufficiently hard so as to deflect the pro~ectile 1 after impact on an inclined lateral face 4 of a rib.
The surface 3 con~ist~ of a covering made of a metal which i~ harder than ~he concrete of the ~tructure 2, the inner face~ 5 of this covering being in contact with the concrete of the structure.
In the embodimen~ in the attached figure~, the covering consist3 of a serie~ o elements with a ~ubstan ~0 tlally in~ert~d-V-shaped cro3s-~ection and which are connected to each other by their oppo~ite longitudinal edges 4a, 4b. The~e V-shaped elemenks are preferably made of ~tandard quality ~te~l and have a thickness of the order of 1 cm. The~e elements are thu~ ~imple to con-struct and inexpsnsive.
~ ~ A~ already ~ndicated above, the lateral face~ 4 of the V-shaped element~ mus~ cause the pro~ectile 1 to slide. To this snd the applicant believes that the height H of the rib~ should be ~ub3tanti~11y be~ween o third of :: :
: ~ :
2~ 31~
the length and the total length of the projectile 1.
If this height H is insufficient, the ~liding of the projectile 1 is insufficient to reduce its effective-ness. If this height H is too considerable, the C08tS of S manufacturing ~he device according to the invention become excessive.
The angle at the peak a o~ the sub~tantially V-shaped elements is preferably of the order of 90~
In the embodLment shown, the bottom of the grooves formed by the sub~tantially V-~haped elements is reinforced.
To this end, the longitudinal edges of the substantially V-shaped elemen~s are e~tended by edge pieces 4c, 4d which overlap each other. The bottom of the grooves formed by the substantially V-shaped ~lements i~
therefore reinforced by a double thickness of metal.
In the embodiment shown in Figure 6, the edge pieces 4c, 4d which overlap each o~her are fastened to each other by rods 6 which are anchored in the concrete of the underlying structure.
Moreover, it can be seen in this Figure 6 that a steel plate 7 which is fastened to the sub~tantially V-shaped elements by means of the rod~ 6 i8 in~erted between the concrete structure to be protected and these elements, the space between this plate 7 and the element~
being filled with concret~ 8. The bottom of the groove~
formed by the substantially V shaped elements is there fore reinforced by three thickne~ses of steel.
The device according to the in~ention can be mounted a~ a reinforcement on the exi3ting concrete surface of a structure or can be u~ed a~ an e~terior, temporary formwork in the construction of a shelter.
The technical effects of the protection or reinforcement device which ha~ ~ust been de~cribed will now be explained.
The hard surface 3 which i~ formed by the ~ux-taposition of V-~haped rlb~ and groove~ lnduce~ one of the following three e~fects:
1) when the head o the pro~actile 1 reaches ~the , .
.
. .
2~?0Q~
surface of the structure 2 in a normal way, it slides or ricochets along an inclined lateral face 4 and thus starts . a rotational movement ~see Figure 3) which unbalances the projectile 1 and can cause it to be destroyed, with the result that ~he ~tructure is virtually unaffected;
2) the projectile 1 first slides on an inclined face 4 and then penetrates the concrete 2 (see arrow F in Figure 4), but with an incidence which is markedly greater than that which it had when it struck, with the result that its destructive effectivenes is markedly reduced;
The present invention relatQs to a device for improving ~he resistance of structures, in par~icular made of concrete, such as shelters, sheds t buildings, walls, paved surfaces, etc., to the Lmpact of conven-tional projec~ile~ such as bomb~ and ~hells~
These concrete structures usually have faces which are plane or have a large radius of curvature.
It is known that the effectiveness of projectiles hitting a concre~e structure is optLmum when ~heir angle of incidence, in other words the angle form~d by the relation between a vertical plane ~nd the plane face of the structure is close to 0. The concrete to be passed through is indeed thinnest at this 0 angle.
Projectiles are less effective for larger angles of incidence since the thicknes~ of the concrete in-creases. Above a certain value of the angle of incidence, the pro~ectiles can ricochet and their effectiveness then become~ zero.
The object of the present invention is to create a device which allows the effec~iveness of projectiles to be reduced and thus the resistance of structures to the impact of these pro~ectiles ~o be improved.
According to the i~Yention thi device compri~es a ~urface formed by a succession of ribs and grooves with a substantially V-shaped profile and smooth, inclined lateral faces, the height of the said ribs being suffi-cient and the said surface being sufficiently hard 80 as to deflect the projectile after Lmpact on an inclined lateral ~ace of a rib.
Becau~e tha lateral faces of the ~ubstantially V-shaped ribs are inclined relative to a plane which is perpendicular to the surface of the structure, when the pro~ectile strike~ thi~ surf~ace perpendicularly, it behaves in one or other of the following ways:~
- the head of the proiectile slide0 (ricochets) along the inclined lateral face and thus sets ofF a rotational movement which unbalance~ the pro~ectile and can lead to it:being destroyed;
:
- , .. : , ~, - the projectile first slides and then penetrates the concrete, but at an incidence greater than that which it had when it struck;
- the projectile is systematically directed towards a low point of the 3~ructure which has been reinforced, which reduces its penetration considerably.
According to an advantageous version of the invention, the said surface consists of a co~ering made of a metal which is harder than concrete, the inner faces of this covering being in contact with concrete.
This covering promotes the sliding of the projec-tile along the inclined face of the rib.
According to a preferred version of the i~ven-tion, the covering consists of a series of elements with a substantially inverted-V-Rhaped cross-section and which are connected to each other by their opposite longitudi-nal edges.
The~e elements are preferably made of s~eel, which allows the cos~ of the device according to the inventio~ to be reduced.
Other features and advantages o~ the inven~ion will also become evident in the description b~low.
In the attached drawings which are given by way of non-limi~ing examples - Figure 1 is a diagra~matic view of a projectile reaching a structure with a certain angle of incidence, - Figure 2 i~ a diagramma~ic ~ectional view o~ a protection device according to the invention showing a pro~ectile reaching : in a normal way the surface of the structure covered by the said devicQ, - Figure 3 i8 a view sLmilar to Figure 2 ~howing the pro~ectile upon impact on the device, - Figure 4 is a view similar to Figure 2 showing ths pro~ectile behaving in a different way, - Figure~5 i8 a~perspective view of the elements of the device according to the~invention with a ~ubstan-tially V-shaped~section~ ~ :
- Figu~e 6 i~a~diagrammatic ~ectional view of a preferred :ver~io~ of the device according to the ~ :
:
, ~ .
: . .~ . ~ ' . .
, -:
.
3Q4~6 invention, - Figur~ 7 and B are views similar to Figure 3, showins the behavior of a projectile reaching a ~tructure with a relatively substantial angle of incidence.
Figure 1 show~ a pro~ectile 1, for example a bomb, reachin~ the pla~e suxface of a concrete structure 2, such a~ a shelter, with an angle of incidence i.
The effectiveness of this projectile 1 is optimum when the angle i is equal to 0 (in other words when the pro~ectile reaches the surface of the structure in a normal way).
~he invention aims ~o reduce the effectiveness of the projec~ile 1 by Lmproving the resistance of the structure as regard~ the Lmpact of the pro~ectile.
Acc~rding to the invention, the device for improving the resistance of the concrete structure 2 comprises (see Figure~ 2 and 3) a surface 3 formed by a succes~ion of ribs and grooves with a ~ubstantially V-shaped profile and smooth, inclined lateral faces, the height H of the ~aid rib~ being ~ufficient and the said surface 3 being sufficiently hard so as to deflect the pro~ectile 1 after impact on an inclined lateral face 4 of a rib.
The surface 3 con~ist~ of a covering made of a metal which i~ harder than ~he concrete of the ~tructure 2, the inner face~ 5 of this covering being in contact with the concrete of the structure.
In the embodimen~ in the attached figure~, the covering consist3 of a serie~ o elements with a ~ubstan ~0 tlally in~ert~d-V-shaped cro3s-~ection and which are connected to each other by their oppo~ite longitudinal edges 4a, 4b. The~e V-shaped elemenks are preferably made of ~tandard quality ~te~l and have a thickness of the order of 1 cm. The~e elements are thu~ ~imple to con-struct and inexpsnsive.
~ ~ A~ already ~ndicated above, the lateral face~ 4 of the V-shaped element~ mus~ cause the pro~ectile 1 to slide. To this snd the applicant believes that the height H of the rib~ should be ~ub3tanti~11y be~ween o third of :: :
: ~ :
2~ 31~
the length and the total length of the projectile 1.
If this height H is insufficient, the ~liding of the projectile 1 is insufficient to reduce its effective-ness. If this height H is too considerable, the C08tS of S manufacturing ~he device according to the invention become excessive.
The angle at the peak a o~ the sub~tantially V-shaped elements is preferably of the order of 90~
In the embodLment shown, the bottom of the grooves formed by the sub~tantially V-~haped elements is reinforced.
To this end, the longitudinal edges of the substantially V-shaped elemen~s are e~tended by edge pieces 4c, 4d which overlap each other. The bottom of the grooves formed by the substantially V-shaped ~lements i~
therefore reinforced by a double thickness of metal.
In the embodiment shown in Figure 6, the edge pieces 4c, 4d which overlap each o~her are fastened to each other by rods 6 which are anchored in the concrete of the underlying structure.
Moreover, it can be seen in this Figure 6 that a steel plate 7 which is fastened to the sub~tantially V-shaped elements by means of the rod~ 6 i8 in~erted between the concrete structure to be protected and these elements, the space between this plate 7 and the element~
being filled with concret~ 8. The bottom of the groove~
formed by the substantially V shaped elements is there fore reinforced by three thickne~ses of steel.
The device according to the in~ention can be mounted a~ a reinforcement on the exi3ting concrete surface of a structure or can be u~ed a~ an e~terior, temporary formwork in the construction of a shelter.
The technical effects of the protection or reinforcement device which ha~ ~ust been de~cribed will now be explained.
The hard surface 3 which i~ formed by the ~ux-taposition of V-~haped rlb~ and groove~ lnduce~ one of the following three e~fects:
1) when the head o the pro~actile 1 reaches ~the , .
.
. .
2~?0Q~
surface of the structure 2 in a normal way, it slides or ricochets along an inclined lateral face 4 and thus starts . a rotational movement ~see Figure 3) which unbalances the projectile 1 and can cause it to be destroyed, with the result that ~he ~tructure is virtually unaffected;
2) the projectile 1 first slides on an inclined face 4 and then penetrates the concrete 2 (see arrow F in Figure 4), but with an incidence which is markedly greater than that which it had when it struck, with the result that its destructive effectivenes is markedly reduced;
3) the projectile 1 is systematically directed by the inclined face 4 towards the bottom of the grooves, which has been particularly reinforced by several layers of steel (see in particular the cas~ of Figure S), with the result that the pene~ration of the pro~ectile 1 is considerably reduced.
~he above applies to the mo~t dangerous type of projectiles, in other words those having an angle of incidence 1 close to 0.
The device according to the invention al~o makes an improvement to the resistance of the structure when the incidence of the pro~ectile i~ markedly greater than oo .
Indead, a pro~ec~ile 1 which strike~ the surface 3 with an incidence i, for example of 30 (sea Figure 7), will not be affected by the sliding or ricocheting which is caused above.
On the other hand, it will tend to pivot towards the area of least re~i~tance when it penetrates the concrete 2 (see Figure 8), in other words towards the outside of the:structure. In this case, the incidence of the projectile will be increa~ed and its ef~ectivene~s reduced.
The invention i8 of course not limited ~o the examples which have ~ust been dsscribed and numerou3 modifications can be made to the~e without going beyond the ~cope of the in~ention.
So, the surface of: the sub~tsntially V-shaped ele~
:: .
, ~ . .
, .
, . - .~ .
L3~ `
ments can b~ treated in order to promote the sliding of the projectile.
:
: :
:
.
~he above applies to the mo~t dangerous type of projectiles, in other words those having an angle of incidence 1 close to 0.
The device according to the invention al~o makes an improvement to the resistance of the structure when the incidence of the pro~ectile i~ markedly greater than oo .
Indead, a pro~ec~ile 1 which strike~ the surface 3 with an incidence i, for example of 30 (sea Figure 7), will not be affected by the sliding or ricocheting which is caused above.
On the other hand, it will tend to pivot towards the area of least re~i~tance when it penetrates the concrete 2 (see Figure 8), in other words towards the outside of the:structure. In this case, the incidence of the projectile will be increa~ed and its ef~ectivene~s reduced.
The invention i8 of course not limited ~o the examples which have ~ust been dsscribed and numerou3 modifications can be made to the~e without going beyond the ~cope of the in~ention.
So, the surface of: the sub~tsntially V-shaped ele~
:: .
, ~ . .
, .
, . - .~ .
L3~ `
ments can b~ treated in order to promote the sliding of the projectile.
:
: :
:
.
Claims (8)
1. A device for improving the resistance of concrete structures (2) to the impact of bombs or missiles (1), which comprises a surface (3) formed by a succession of ribs and grooves with a substantially V-shaped profile and smooth, inclined lateral faces (4), the said surface (3) consisting of a covering made of a metal which is harder than concrete, the inner faces (5) of this cover-ing being in contact with concrete, the height (H) of the said ribs being sufficient and the said covering being sufficiently hard so as to deflect the projectile (1) after impact on the inclined lateral face (4) of a rib.
2. The device as claimed in claim 1, wherein the covering consists of a series of elements with a substan-tially inverted-V-shaped cross-section and which are connected to each other by their opposite longitudinal edges (4a, 4b).
3. The device as claimed in either of claims 1 or 2, wherein the covering is made of steel.
4. The device as claimed in one of claims 1 to 3, wherein the height (H) of the ribs is substantially between a third of the length and the total length of the projectile (1).
5. The device a claimed in one of claims 1 to 4, wherein the bottom of the grooves has a reinforcement.
6. The device as claimed in one of claims 2 to 5, wherein the longitudinal edges (4a, 4b) of the substan-tially V-shaped elements are extended by edge pieces (4c, 4d) which overlap each other to form a reinforcement.
7. The device as claimed in claim 6, wherein the edge pieces (4c, 4d) which overlap each other are fastened to each other by rods (6) which are anchored in the underlying concrete (2).
8. The device as claimed in claim 7, wherein a metal plate (7) which is fastened to the V-shaped elements by means of the said rods (6) is inserted between the concrete structure (2) to be protected and these ele-ments, the space between this plate (7) and the elements being filled with concrete (8).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8813534 | 1988-10-14 | ||
| FR8813534A FR2637935B1 (en) | 1988-10-14 | 1988-10-14 | DEVICE FOR IMPROVING THE STRENGTH OF WORKS TO THE IMPACT OF CONVENTIONAL PROJECTILES |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2000436A1 true CA2000436A1 (en) | 1990-04-14 |
Family
ID=9371024
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002000436A Abandoned CA2000436A1 (en) | 1988-10-14 | 1989-10-11 | Device for improving the resistance of structures to the impact of conventional projectiles |
Country Status (10)
| Country | Link |
|---|---|
| EP (1) | EP0364357B1 (en) |
| CA (1) | CA2000436A1 (en) |
| DE (1) | DE68901023D1 (en) |
| DK (1) | DK510089A (en) |
| ES (1) | ES2030289T3 (en) |
| FR (1) | FR2637935B1 (en) |
| GR (1) | GR3004166T3 (en) |
| NO (1) | NO170173C (en) |
| PT (1) | PT91987B (en) |
| TR (1) | TR25306A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9151577B2 (en) | 2013-07-03 | 2015-10-06 | Rixford Smith | Pyramid-sphere bunker system |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112129178A (en) * | 2019-06-25 | 2020-12-25 | 北京清华同衡规划设计研究院有限公司 | With yaw protection structure |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US787065A (en) * | 1902-04-25 | 1905-04-11 | Frank G White | Armor-plate. |
| GB527591A (en) * | 1939-04-15 | 1940-10-11 | Albert James Bridle | Improvements relating to air raid shelters and the like |
| DE1675801U (en) * | 1953-01-21 | 1954-05-06 | Nelsbach & Co | SPLITTER PROTECTION WALL MADE OF PRE-FABRICATED PARTS. |
| DE2325921A1 (en) * | 1973-05-22 | 1974-12-12 | Karl Weber | SHOT-PROOF WALL, IN PARTICULAR FOR VEHICLES, INCLUDING AIRPLANES |
| DE2818733A1 (en) * | 1978-04-28 | 1979-10-31 | Wahl Verschleiss Tech | Low cost armour plating - comprises chilled cast iron layers opt. contg. hard inserts |
| FR2519133A1 (en) * | 1981-12-29 | 1983-07-01 | Graner Joseph | Penetration resistant armour plate - has front plate with shaped and spaced cones to deflect projectiles |
| FR2529933A1 (en) * | 1982-07-12 | 1984-01-13 | Alsthom Atlantique | PROTECTION COVER AGAINST PASSIVE MISSILES IMPACTS |
| DE3508865A1 (en) * | 1985-03-13 | 1986-09-18 | Jürgen Dipl.-Ing. 6607 Quierschied Unterländer | Shelters comprising a structural steel/trapezoidal profiled sheet-metal composite system of the modular construction principle |
-
1988
- 1988-10-14 FR FR8813534A patent/FR2637935B1/en not_active Expired - Fee Related
-
1989
- 1989-10-06 NO NO894012A patent/NO170173C/en unknown
- 1989-10-11 ES ES198989402802T patent/ES2030289T3/en not_active Expired - Lifetime
- 1989-10-11 EP EP89402802A patent/EP0364357B1/en not_active Expired - Lifetime
- 1989-10-11 CA CA002000436A patent/CA2000436A1/en not_active Abandoned
- 1989-10-11 DE DE8989402802T patent/DE68901023D1/en not_active Expired - Fee Related
- 1989-10-12 TR TR89/0880A patent/TR25306A/en unknown
- 1989-10-13 DK DK510089A patent/DK510089A/en not_active Application Discontinuation
- 1989-10-13 PT PT91987A patent/PT91987B/en not_active IP Right Cessation
-
1992
- 1992-03-26 GR GR920400534T patent/GR3004166T3/el unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9151577B2 (en) | 2013-07-03 | 2015-10-06 | Rixford Smith | Pyramid-sphere bunker system |
Also Published As
| Publication number | Publication date |
|---|---|
| PT91987A (en) | 1990-04-30 |
| NO170173B (en) | 1992-06-09 |
| PT91987B (en) | 1995-08-09 |
| GR3004166T3 (en) | 1993-03-31 |
| EP0364357A1 (en) | 1990-04-18 |
| ES2030289T3 (en) | 1992-10-16 |
| EP0364357B1 (en) | 1992-03-18 |
| NO894012L (en) | 1990-04-17 |
| FR2637935A1 (en) | 1990-04-20 |
| DK510089D0 (en) | 1989-10-13 |
| NO894012D0 (en) | 1989-10-06 |
| DK510089A (en) | 1990-04-15 |
| NO170173C (en) | 1992-09-16 |
| TR25306A (en) | 1992-12-21 |
| FR2637935B1 (en) | 1993-07-16 |
| DE68901023D1 (en) | 1992-04-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Discontinued |