EP1521052A1 - Armour perforating projectile - Google Patents

Armour perforating projectile Download PDF

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Publication number
EP1521052A1
EP1521052A1 EP20040292218 EP04292218A EP1521052A1 EP 1521052 A1 EP1521052 A1 EP 1521052A1 EP 20040292218 EP20040292218 EP 20040292218 EP 04292218 A EP04292218 A EP 04292218A EP 1521052 A1 EP1521052 A1 EP 1521052A1
Authority
EP
European Patent Office
Prior art keywords
ammunition
penetration
bars
insert
piercing
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.)
Granted
Application number
EP20040292218
Other languages
German (de)
French (fr)
Other versions
EP1521052B1 (en
Inventor
Dominique Bouchaud
Nicolas Eches
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nexter Munitions
Original Assignee
Giat Industries SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to FR0311645 priority Critical
Priority to FR0311645A priority patent/FR2860579B1/en
Application filed by Giat Industries SA filed Critical Giat Industries SA
Publication of EP1521052A1 publication Critical patent/EP1521052A1/en
Application granted granted Critical
Publication of EP1521052B1 publication Critical patent/EP1521052B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42AMMUNITION; BLASTING
    • F42BEXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B12/00Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material
    • F42B12/02Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect
    • F42B12/04Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of armour-piercing type
    • F42B12/06Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of armour-piercing type with hard or heavy core; Kinetic energy penetrators

Abstract

The invention relates to a perforating munition (1) comprising a penetration body (2) defining an internal cavity (3) closed by a base (4). This ammunition is characterized in that the penetration body (2) comprises a front tip (2a) comprising at least one insert (7) integral with the tip, insert made of a material denser than that of the body and disposed in a housing opening out of the body. <IMAGE>

Description

The technical field of the invention is that of ammunition allowing the destruction of targets strongly protected by a wall for example of concrete.

It is known, in particular from patent US6186072, to define a munition with a piercing body the inertia ensures the crossing of walls of protection thick. This ammunition contains an explosive incendiary which is initiated during the perforation or after crossing the wall.

The body piercing this ammunition has an insert massive which is embedded inside the body material.

This insert is made of a dense and resistant alloy mechanically, chosen for example from among the materials refractories and their alloys (tungsten, tantalum, uranium).

The material of the body is formed by steel which is poured around the insert.

This ammunition has the disadvantage of being complex to manufacture. It is difficult and expensive to achieve a dense core of large diameter (greater than 90mm) and having high mechanical characteristics in a way reproducible (density greater than 13, elastic limit greater than 1000 Mega Pascals). Indeed these materials are implemented in the form of powders by the techniques of compression.

It is then expensive to sink a steel body around such a nucleus whose mechanical characteristics risk moreover, to be degraded by the casting operation.

In fact the material of the insert described by US6186072 does not performs only a ballast function and has no capacity clean perforating.

It is the object of the invention to propose an ammunition piercing does not have such drawbacks.

Thus the ammunition according to the invention is of manufacture simplified.

In addition, the munition according to the invention to ensure the perforation of a concrete target regardless the angle of impact on the target.

Thus the invention relates to a perforating munition comprising a penetration body delimiting a cavity internal closed by a base, ammunition characterized in that the penetration body is made of a material having a yield strength greater than or equal to 1,200 Mega Pascals and has a front tip comprising at least one insert integral with the tip, insert made of a material high mechanical characteristics, denser than that of the body and disposed in a housing opening out of the body.

According to a first embodiment of the invention, the inserts are shaped into radially arranged segments around an axial extension of the body, segments rendered integral with the body by a connecting means.

The connecting means may comprise at least one ring surrounding the inserts.

This piercing ammunition may also include a dense alloy nose at the end of the extension axial axis of the body and having a rear surface resting on the segments.

According to another embodiment of the invention, each insert may be constituted by a bar substantially cylindrical housed in a bore body penetration.

The piercing ammunition can thus comprise an insert single axis with a forward tip extending the body penetration.

This ammunition may then include a charge of propellant powder for ejecting the insert out of the body penetration.

According to another embodiment, the ammunition can have at least one ring of bars regularly arranged around an axis of the penetration body.

It can thus comprise two crowns of bars regularly arranged around an axis of the body of penetration.

The ends of the bars can be flush with an outer surface of the penetration body.

The ends of the bars may instead be protrusion outside the penetration body.

Each bar may have its axis inclined relative to the axis of the body of penetration.

The ends of the bars of a crown and another crown and / or axial bar may be substantially in the same plane.

The internal cavity may contain at least one load explosive.

The invention will be better understood on reading the following description of various embodiments, a description given with reference to the appended drawings and in which:

  • FIGS. 1a and 1b show a first embodiment of a munition according to the invention, FIG. 1a being a longitudinal section and FIG. 1b an uncut external view of this ammunition,
  • FIG. 2 shows a second embodiment of a munition according to the invention,
  • FIG. 3 shows a third embodiment of a munition according to the invention,
  • FIGS. 4a, 4b and 4c show a fourth embodiment of a munition according to the invention, FIG. 4a being a longitudinal section, FIG. 4b an uncoupled external view of this ammunition and FIG. 4c being a front view. of the warhead of this ammunition,
  • FIGS. 5a and 5b show an alternative embodiment of this fourth embodiment, FIG. 5a being a longitudinal section and FIG. 5b an uncoupled external view of this ammunition,
  • FIGS. 6a and 6b show another alternative embodiment of this fourth embodiment, FIG. 6a being a longitudinal section and FIG. 6b an uncut external view of this ammunition.
  • Figures 7a and 7b show in longitudinal section two other embodiments of the munition according to the invention.

Referring to FIGS. 1a and 1b an ammunition perforant 1 according to one embodiment of the invention comprises a penetration body 2 which delimits a cavity internal 3 closed by a base 4.

This ammunition could be an air / ground bomb or a missile or a missile military head. She will have a diameter greater than 100 mm and a length of about 1.5m.

Depending on the operational requirements, it may have a rear part (not shown) incorporating a thruster that will give it a range or speed given.

It may also possibly include a module guidance / steering.

The internal cavity 3 contains an explosive charge 5 which can be initiated by a rocket 6 disposed in the vicinity of the base 4. The rocket shall be designed to ensure the detection crossing a wall and then initiating the loading explosive once this wall crossed. Such rockets are well known to those skilled in the art. We can for example see US5255608 which describes such a rocket.

Penetration body 2 has a front tip 2a which is extended by a rear cylindrical portion 2b delimiting the internal cavity 3.

This body is made of high material mechanical characteristics, ie a material whose elastic limit is greater than or equal to 1200 Mega Pascals. For example, 35NCD16 steel may be used.

According to the invention the front tip 2a comprises inserts 7 made of a denser material than the one 2. These inserts are made of a dense material to high mechanical characteristics. We will choose a material of density greater than or equal to 17 and having a limit elastic greater than or equal to 1000 Mega Pascals. We will be able to for example using a high-limit tungsten alloy elastic and obtained by sintering. We could also make the bars of depleted uranium or tantalum.

The inserts 7 are here shaped into segments arranged radially around an axial axial extension 8 of the body 2.

So each segment is in contact with the body 2, on the one hand at the axial extension 8 and on the other share with a shoulder 9 of the body 2. Free space surrounding the axial extension 8 thus constitutes a dwelling for the inserts.

Each insert 7 is also in contact with two other neighboring inserts. The set of inserts thus forms the ogee-shaped part of the front tip 2a of the penetration body 2.

The inserts 7 are made integral with the body by a connecting means which comprises at least one ring 10 surrounding the inserts 7. This ring will be made of steel. She is will lodge in a groove 11 formed by the juxtaposition notches carried by each insert.

The ammunition 1 also has a nose 12 which is it also made of a dense alloy. This nose is set at a end 14 of smaller diameter carried by the extension axial 8 of the body 2. The nose 12 has a rear surface 13 resting on the inserts 7.

The nose 12 is fixed on the end 14 for example by thread. It allows to transmit to different inserts 7 shock when impacting a target.

Thus, the munition according to the invention combines an ogive of large diameter (greater than 90 mm) and capacity important perforator with a steel body function to ensure the carriage of the explosive charge and the maintaining perforating inserts.

The inserts have reasonable dimensions (section of the order of 2000 mm 2 to 6000 mm 2 ) which allows their manufacture according to sintering techniques already implemented for artillery arrows projectiles.

Thanks to the design of the munition according to the invention, it also becomes possible to improve a munition in replacing at the end of a storage phase the inserts 7 initially provided by inserts with improved mechanical characteristics.

FIG. 2 shows a munition 1 according to another mode of embodiment of the invention.

This mode differs from the previous one only in the structure of the front tip 2a.

The nose 2a here comprises an axial bore 15 to inside which is positioned an insert 7 having the shape of a substantially cylindrical bar and made of a denser material than the body 2.

The front tip 16 of this insert has an ogee shape which extends the body of penetration 2.

This insert 7 will thus have a diameter of the order of 30 to 40 mm for a penetration body 2 of diameter 90 mm. Her manufacturing is thus facilitated. The implementation of a tungsten alloy with high mechanical properties (yield strength greater than or equal to 1000 mega pascals) allows to confer on this point a perforating character and no simple ballast. This improves the capacity of perforation of the ammunition for a given mass.

The ammunition shown in Figure 3 also includes a single insert 7 of dense material disposed in a bore axial 15.

This insert 7 has an internal cavity 17 inside of which is disposed a charge of propellant powder 18.

A device 19 for igniting this charge is housed in the body 2. It is connected by a link wired 20 to the rocket 6.

The latter will then include a chronometric module or a proximity detection module (connected to a antenna not shown integral with the body's warhead 2) which will trigger the ignition of the propellant charge 18 before the impact on a target and at a distance from it the order of 3 to 4 calibers.

The propellant charge 18 will ensure the ejection of the insert 7 out of the body of penetration 2. It will thus be propelled towards the target. The speed differential between insert 7 and the body 2 will be of the order of 200 m / s. Such a provision allows to increase the perforation capabilities of the ammunition without increasing its speed.

The insert will ensure the drilling of a pre-hole in the target, the penetration body will then impact the target at level of this before hole.

Figures 4a, 4b and 4c show another mode of production of a perforating munition according to the invention.

This mode differs from the previous ones only in the structure of the piercing head 2a which here comprises several bars 7a, 7b, 7c crimped into bores arranged in the body of the tip 2a.

Each bar 7a, 7b, 7c is cylindrical and the axis of its bore is parallel to the axis 21 of the piercing head 2a.

The bars 7a and 7b are thus distributed in two concentric rings surrounding the axis 21 of the head perforating. A bar 7c also occupies a bore coaxial to the head 2a (see also Figure 4c).

There is therefore around the axial bar 7c a first crown or middle crown comprising eight bars 7b regularly distributed around axis 21 and a second crown or outer ring comprising sixteen bars 7a regularly distributed around axis 21.

The diameters of the peripheral bars 7a are here lower than those of the median bars 7b. The diameters of different bars may be identical or different for reasons of organization of the piercing head. The goal sought is to obtain the highest overall density for the piercing head. The diameters of the bars can be between 10 mm and 30 mm.

The ends of the various bars are machined from so that they are flush with a surface Outer shell of the front tip 2a (see Figures 4a and 4b) penetration body 2. Thus the bars 7 do not disturb not the aerodynamics of the ammunition 1.

The bars are still made of a dense material, for example, a tungsten alloy obtained by sintering. Because of the reduced diameter for the bars, we can here adopt a material with mechanical characteristics such as a tungsten alloy whose elastic limit will be greater than or equal to 1500 Mega Pascals. The body of the heads 2a is made of steel.

This embodiment makes it easy to obtain a front tip 2a having a high density. It is indeed more easy to make dense bars of reduced diameter (from order of 10 to 30 mm) than to achieve a peak before large diameter (greater than 150mm) in such a sintered material.

Moreover it would be difficult to make a body 2 of fully sintered tungsten ammunition and comprising a massive front part connected to a thin back and delimiting a cavity 3.

It is of course possible to predict a number and a different distribution for the bars.

Figures 5a and 5b represent another mode of which differs from the preceding only in the form of bars 7.

According to this embodiment, the ends of the bars 7a and 7b protrude outside the body of 2. Each bar therefore has a point 22 which extends outside the outer surface of the spike before 2a.

This results in a stronger snapping ability of the tip before 2a when impacting a target with a impact.

The axes of the bars 7a, 7b and 7c are again all parallel to the axis 21 of the ammunition.

Figures 6a and 6b show another way of analogous to that of Figures 5a and 5b but in which each bar 7a or 7b has its axis 23a or 23b inclined with respect to the axis 21 of the penetration body 2.

Thus the bars 7a of the outer ring have an axis 23a which is inclined at an angle α of the order of 20 ° to 30 °.

The bars 7b of the middle crown have an axis 23b which is inclined by an angle β of the order of 10 ° to 15 °.

This provision also makes it possible the attachment of the nose 2a on the target during a impact with impact.

Compared to the previous one, this embodiment makes it possible to to increase the rigging capacity without increasing the masses or diameters of bars 7.

Figure 7a shows another embodiment similar to that of Figures 5a and 5b but in which the bars 7b of the middle crown have a length such that their tip 22 is substantially at the level of the tip 22 of the axial bar 7c (so at the same plane 24).

Such an embodiment makes it possible to ensure simultaneous weakening of the target at the level of several point of impact. This improves the perforation.

Figure 7b shows an embodiment similar to that of Figure 7a but in which all the bars have a length such that their tip 22 is substantially at the point 22 of the axial bar 7c (therefore at the level from the same plane 24).

This multiplies the number of impact points simultaneous on the target.

It would of course be possible to extend the inclined bars as shown in Figures 6a and 6b.

We could also put the ends of the bars external 7a and median crowns 7b at the same level plan while leaving the end of the bar 7c indented or well protruding from the crowns.

Various variants are possible without going outside the box of the invention.

It is thus possible to combine the modes of embodiment of FIGS. 4a to 7b (multiple bars) with that of Figure 3 (propelled bar).

It will thus be possible to provide a propellant charge permitting to eject the axial bar 7c before impact on the target. The other bars distributed over the crowns remaining fixed by compared to the front tip 2a.

It will also be possible to replace the explosive charge 5 by a different kind of loading, for example a incendiary charge or one or more submunitions explosive and / or incendiary ejected after perforation of target.

Claims (14)

  1. A perforating ammunition (1) comprising a penetration body (2) delimiting an internal cavity (3) closed by a base (4), characterized in that the penetration body (2) is made of a material having an upper elastic limit or equal to 1200 Mega Pascals and comprises a front tip (2a) comprising at least one insert (7,7a, 7b, 7c) integral with the tip (2a), insert made of a material with high mechanical characteristics, denser than that of the body and disposed in a housing opening out of the body.
  2. Punching ammunition according to claim 1, characterized in that the inserts (7) are shaped in segments arranged radially around an axial extension (8) of the body (2), segments secured to the body by a connecting means.
  3. Piercing ammunition according to claim 2, characterized in that the connecting means comprises at least one ring (10) surrounding the inserts (7).
  4. Piercing ammunition according to one of claims 2 or 3, characterized in that it comprises a nose (12) of dense alloy disposed at the end of the axial extension (8) of the body and having a rear surface (13) bearing on the segments (7).
  5. Punching ammunition according to claim 1, characterized in that each insert (7) is constituted by a substantially cylindrical bar housed in a bore of the penetration body (2).
  6. Piercing ammunition according to claim 5, characterized in that it comprises a single axial insert (7) comprising a front tip (16) extending the penetration body (2).
  7. Piercing ammunition according to claim 6, characterized in that it comprises a charge of propellant powder (18) for ejecting the insert (7) out of the penetration body (2).
  8. Piercing ammunition according to claim 5, characterized in that it comprises at least one ring of bars (7a, 7b) regularly arranged around an axis (21) of the penetration body (2).
  9. Piercing ammunition according to claim 8, characterized in that it comprises two ring rings (7a, 7b) regularly arranged around an axis (21) of the penetration body (2).
  10. Piercing ammunition according to one of claims 8 or 9, characterized in that the ends of the bars (7a, 7b) are flush with an outer surface of the penetration body (2).
  11. Piercing ammunition according to one of claims 8 or 9, characterized in that the ends of the bars (7a, 7b) protrude outside the penetration body (2).
  12. Piercing ammunition according to claim 11, characterized in that each bar (7a, 7b) has its axis inclined with respect to the axis (21) of the penetration body (2).
  13. Punching ammunition according to one of claims 11 or 12, characterized in that the ends of the bars (7a, 7b) of a ring and another ring and / or an axial bar (7c) are substantially in the same plan (24).
  14. Piercing ammunition according to one of claims 1 to 13, characterized in that the internal cavity (3) contains at least one explosive charge (5).
EP20040292218 2003-10-03 2004-09-16 Armour perforating projectile Active EP1521052B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR0311645 2003-10-03
FR0311645A FR2860579B1 (en) 2003-10-03 2003-10-03 Perforating munition

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP06076213A EP1701131B1 (en) 2003-10-03 2004-09-16 Armour perforating projectile

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP06076213A Division EP1701131B1 (en) 2003-10-03 2004-09-16 Armour perforating projectile

Publications (2)

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EP1521052A1 true EP1521052A1 (en) 2005-04-06
EP1521052B1 EP1521052B1 (en) 2007-06-20

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EP20040292218 Active EP1521052B1 (en) 2003-10-03 2004-09-16 Armour perforating projectile
EP06076213A Active EP1701131B1 (en) 2003-10-03 2004-09-16 Armour perforating projectile

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EP06076213A Active EP1701131B1 (en) 2003-10-03 2004-09-16 Armour perforating projectile

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US (1) US7063020B2 (en)
EP (2) EP1521052B1 (en)
AT (1) AT365307T (en)
DE (2) DE602004007080T2 (en)
ES (2) ES2344597T3 (en)
FR (1) FR2860579B1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2372296A1 (en) * 2010-03-30 2011-10-05 Nexter Munitions Kinetic energy penetrator
EP2636985A1 (en) 2012-03-06 2013-09-11 Nexter Munitions Subcalibre projectile with improved head

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7748031B2 (en) * 2005-07-08 2010-06-29 Sandisk Corporation Mass storage device with automated credentials loading
US8985026B2 (en) 2011-11-22 2015-03-24 Alliant Techsystems Inc. Penetrator round assembly
IL219010A (en) * 2012-04-03 2016-11-30 Amon Jacob Missile warhead
US9212876B1 (en) * 2013-08-30 2015-12-15 The United States Of America As Represented By The Secretary Of The Army Large caliber frangible projectile

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB107252A (en) * 1916-06-27 1917-06-27 William Warburton Improvements in the Manufacture of Armour Piercing Bursting Shells or Projectiles.
US3203349A (en) * 1962-09-18 1965-08-31 Kohlswa Jernverks Ab Projectile or the like, preferably for armor-piercing weapons, and a method of manufacturing such a projectile
US3731630A (en) * 1969-08-05 1973-05-08 Oerlikon Buehrle Ag High-explosive armor-piercing shell
US4108072A (en) * 1964-12-29 1978-08-22 Deutsch-Franzosisches Forschungsinstitut Armor-piercing projectile having spaced cores
WO1987007708A1 (en) * 1986-06-09 1987-12-17 Royal Ordnance Pld Armour piercing projectile
DE9018051U1 (en) * 1990-07-24 1994-04-07 Rheinmetall Gmbh Sub-caliber balancing projectile
FR2771496A1 (en) * 1983-10-27 1999-05-28 Rheinmetall Gmbh Sub calibre kinetic projectile for gun
US6186072B1 (en) 1999-02-22 2001-02-13 Sandia Corporation Monolithic ballasted penetrator

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3464356A (en) * 1967-12-28 1969-09-02 Us Army Self-stabilizing rod penetrators
US4597333A (en) * 1983-07-08 1986-07-01 Rheinmetall G.M.B.H. Two-part armor-piercing projectile
US4573412A (en) * 1984-04-27 1986-03-04 The United States Of America As Represented By The Secretary Of The Army Plug nozzle kinetic energy penetrator rocket
US5255608A (en) 1992-12-16 1993-10-26 The United States Of America As Represented By The Secretary Of The Air Force Real-time identification of a medium for a high-speed penetrator
DE10332257A1 (en) * 2003-07-16 2005-02-03 Rheinmetall W & M Gmbh Warhead

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB107252A (en) * 1916-06-27 1917-06-27 William Warburton Improvements in the Manufacture of Armour Piercing Bursting Shells or Projectiles.
US3203349A (en) * 1962-09-18 1965-08-31 Kohlswa Jernverks Ab Projectile or the like, preferably for armor-piercing weapons, and a method of manufacturing such a projectile
US4108072A (en) * 1964-12-29 1978-08-22 Deutsch-Franzosisches Forschungsinstitut Armor-piercing projectile having spaced cores
US3731630A (en) * 1969-08-05 1973-05-08 Oerlikon Buehrle Ag High-explosive armor-piercing shell
FR2771496A1 (en) * 1983-10-27 1999-05-28 Rheinmetall Gmbh Sub calibre kinetic projectile for gun
WO1987007708A1 (en) * 1986-06-09 1987-12-17 Royal Ordnance Pld Armour piercing projectile
DE9018051U1 (en) * 1990-07-24 1994-04-07 Rheinmetall Gmbh Sub-caliber balancing projectile
US6186072B1 (en) 1999-02-22 2001-02-13 Sandia Corporation Monolithic ballasted penetrator

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2372296A1 (en) * 2010-03-30 2011-10-05 Nexter Munitions Kinetic energy penetrator
EP2636985A1 (en) 2012-03-06 2013-09-11 Nexter Munitions Subcalibre projectile with improved head
FR2987891A1 (en) * 2012-03-06 2013-09-13 Nexter Munitions Projectile under caliber having a drained head structure
US8869704B2 (en) 2012-03-06 2014-10-28 Nexter Munitions Sub-caliber projectile with a fitted head structure

Also Published As

Publication number Publication date
DE602004007080D1 (en) 2007-08-02
EP1521052B1 (en) 2007-06-20
FR2860579B1 (en) 2007-10-05
EP1701131B1 (en) 2010-04-14
EP1701131A3 (en) 2006-10-04
ES2344597T3 (en) 2010-09-01
FR2860579A1 (en) 2005-04-08
US20050109233A1 (en) 2005-05-26
DE602004026633D1 (en) 2010-05-27
EP1701131A2 (en) 2006-09-13
DE602004007080T2 (en) 2008-02-21
ES2288669T3 (en) 2008-01-16
AT365307T (en) 2007-07-15
US7063020B2 (en) 2006-06-20

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