EP0337903A1 - Ammunition for the low-pressure launching of voluminous low-mass projectiles - Google Patents
Ammunition for the low-pressure launching of voluminous low-mass projectiles Download PDFInfo
- Publication number
- EP0337903A1 EP0337903A1 EP89420127A EP89420127A EP0337903A1 EP 0337903 A1 EP0337903 A1 EP 0337903A1 EP 89420127 A EP89420127 A EP 89420127A EP 89420127 A EP89420127 A EP 89420127A EP 0337903 A1 EP0337903 A1 EP 0337903A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cartridge
- chamber
- ammunition
- bucket
- bore
- 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.)
- Withdrawn
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B7/00—Shotgun ammunition
- F42B7/02—Cartridges, i.e. cases with propellant charge and missile
- F42B7/08—Wads, i.e. projectile or shot carrying devices, therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B5/00—Cartridge ammunition, e.g. separately-loaded propellant charges
- F42B5/02—Cartridges, i.e. cases with charge and missile
Definitions
- the object of the invention relates to the technical sector of ammunition.
- the object of the invention is to remedy these drawbacks in a simple, efficient and rational manner.
- an ammunition of the type comprising that a cylindrical case, one end of which is capable of receiving at least one projectile while the other end has a concentric chamber capable of receiving a cartridge of reduced size.
- This cartridge is remarkable in that the chamber has, over its entire length, a constant and uniform internal diameter corresponding to that of the cartridge to avoid the rise in high pressure, said cartridge being charged with pyroxilated powder, and receives a primer overloaded with fulminant composition.
- the said projectile (s) are contained in a bucket element mounted with free sliding and centered in the bore of the corresponding part of the case and in support in combination with an arrangement of said bore, above the chamber receiving the cartridge.
- the arrangement is a shoulder.
- the bucket has at its rear part, a sealing skirt and positioning in the bore of the case on the shoulder.
- the bottom of the cup is convex to support without deformation the gas flow leaving the chamber and to favor its distribution.
- edges of the rear skirt of the bucket, from the convex bottom, are of decreasing thickness, up to the free end.
- the front part of the bucket has slots regularly distributed over a circumference to facilitate the opening of said part at the outlet of the box under the pressure of the air.
- the ammunition comprises a plastic cylindrical case (1), one end (1a) of which is capable of receiving at least one projectile (P), while the other end has a concentric chamber (1b) capable of receiving a cartridge ( 2) reduced size.
- the chamber (1b) has, over its entire length, a constant and uniform internal diameter corresponding to the diameter of the cartridge (2). This results in an absence of throttling at the outlet of the chamber avoiding the rise in high pressure and makes it possible to reduce the difference between the primary pressure in the cartridge (2) housed in the chamber (1b) and secondary in the free volume. of the case (1) containing the projectile.
- the cartridge (2) is loaded with pyroxilated powder and receives a primer (3) overloaded with fulminant composition. As a result, the charge of pyroxilated powder is ignited entirely and instantly by a more powerful ignition of the reinforced primer.
- the projectile (s) are contained in a bucket member (4) mounted to slide freely and centered in the bore (1a) of the corresponding part of the case (1).
- This cup (4) is supported on a shoulder (1c) formed above the chamber receiving the cartridge (2).
- the rear part of the bucket (4) has a skirt (4a) for sealing and positioning in the bore (1a) of the case on the shoulder (1c).
- the bottom (4b) of the cup (4) is convex to support, without deformation, the gas flow leaving the chamber and thus promote its distribution.
- edges of the rear skirt (4a) of the bucket (4) from the convex bottom (4b), are of decreasing thickness to the free end in order to distribute the pressure of the gas column without depressing the bucket and its content.
- the front part of the bucket (4) has slots (4c) regularly distributed over a circumference to facilitate the opening of said part at the outlet of the barrel under the pressure of air.
- the cup (3) is made of plastic.
- the projectile (s) (P) can be produced from solid bodies of flexible material or else composed of flexible envelopes containing a liquid.
- the ammunition as described uses a projectile (P) in the form of a spherical bullet made of deformable flexible material.
- P projectile
- the outer peripheral edge of the chamber (1b) and the corresponding part of the bore of the case (1), in particular up to the level of the shoulder (1c), are braced by radial fins (1d).
- the munition according to the invention uses a charge of pyroxilated powder without high pressure.
- the invention finds a particularly advantageous application for the propulsion of flexible projectiles of large diameter used in particular for self-defense.
- the ammunition as described and illustrated may advantageously be used in a weapon of the type described in Patent Application No. 2,585,818.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Telescopes (AREA)
- Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
- Portable Nailing Machines And Staplers (AREA)
Abstract
La munition est remarquable en ce que la chambre (1b) a, sur la totalité de sa longueur, un diamètre interne constant et uniforme correspondant à celui de la cartouche (2) pour éviter la montée en haute pression, ladite cartouche (2) étant chargée de poudre pyroxilée, et reçoit une amorce (3) surchargée en composition fulminante.The ammunition is remarkable in that the chamber (1b) has, over its entire length, a constant and uniform internal diameter corresponding to that of the cartridge (2) to prevent the rise in high pressure, said cartridge (2) being loaded with pyroxilated powder, and receives a primer (3) overloaded with fulminant composition.
Description
L'objet de l'invention se rattache au secteur technique des munitions.The object of the invention relates to the technical sector of ammunition.
On connaît des munitions d'armes à feu de gros calibre conçues pour le tir de projectiles en matière souple ou composées d'enveloppe souple contenant un liquide. La fragilité de ces projectiles est incompatible avec des systèmes de propulsion basés sur une pyrotechnie fonctionnant à haute pression. C'est le cas des mortiers et lance-grenades qui propulsent des charges lourdes.Large caliber ammunition for firearms designed for firing projectiles made of flexible material or composed of a flexible envelope containing a liquid is known. The fragility of these projectiles is incompatible with propulsion systems based on pyrotechnics operating at high pressure. This is the case of mortars and grenade launchers which propel heavy loads.
La propulsion de charges volumineuses et légères impose une balistique interne orientée vers les basses pressions. En effet, l'énergie est en rapport direct avec la surface soumise a la poussée des gaz de combustion de la poudre. A cet égard, seule la poudre noire offre une plage de combustion vive et complète sous une pression relativement basse.The propulsion of bulky and light loads requires internal ballistics oriented towards low pressures. Indeed, the energy is in direct relation with the surface subjected to the thrust of the combustion gases of the powder. In this regard, only the black powder offers a lively and complete combustion range under relatively low pressure.
Cependant, l'emploi de la poudre noire engendre une abondante fumée et des résidus importants.However, the use of black powder generates abundant smoke and significant residues.
L'invention s'est fixée pour but de remédier à ces inconvénients d'une manière simple, efficace et rationnelle.The object of the invention is to remedy these drawbacks in a simple, efficient and rational manner.
Pour résoudre le problème posé, d'avoir un système pyrotechnique fonctionnant à basse pression, sans l'emploi d'une charge de poudre noire, il a été conçu et mis au point, selon l'invention, une munition du type de celle comprenant un étui cylindrique dont une extrémité est apte à recevoir au moins un projectile tandis que l'autre extrémité présente une chambre concentrique apte à recevoir une cartouche de dimension réduite.To solve the problem posed, to have a pyrotechnic system operating at low pressure, without the use of a black powder charge, it was designed and developed, according to the invention, an ammunition of the type comprising that a cylindrical case, one end of which is capable of receiving at least one projectile while the other end has a concentric chamber capable of receiving a cartridge of reduced size.
Cette cartouche est remarquable en ce que la chambre a, sur la totalité de sa longueur, un diamètre interne constant et uniforme correspondant à celui de la cartouche pour éviter la montée en haute pression, ladite cartouche étant chargée de poudre pyroxilée, et reçoit une amorce surchargée en composition fulminante.This cartridge is remarkable in that the chamber has, over its entire length, a constant and uniform internal diameter corresponding to that of the cartridge to avoid the rise in high pressure, said cartridge being charged with pyroxilated powder, and receives a primer overloaded with fulminant composition.
Pour résoudre le problème d'assurer la protection du ou des projectiles contre les pressions et érosions, le ou lesdits projectiles sont contenus dans un élément formant godet monté à libre coulissement et centré dans l'alésage de la partie correspondante de l'étui et en appui en combinaison avec un agencement dudit alésage, au-dessus de la chambre recevant la cartouche.To solve the problem of ensuring the protection of the projectile (s) against pressure and erosion, the said projectile (s) are contained in a bucket element mounted with free sliding and centered in the bore of the corresponding part of the case and in support in combination with an arrangement of said bore, above the chamber receiving the cartridge.
Avantageusement, l'agencement est un épaulement.Advantageously, the arrangement is a shoulder.
Le godet présente à sa partie arrière, une jupe d'étanchéité et de positionnement dans l'alésage de l'étui sur l'épaulement.The bucket has at its rear part, a sealing skirt and positioning in the bore of the case on the shoulder.
Le fond du godet est convexe pour supporter sans déformation le flux gazeux sortant de la chambre et favoriser sa répartition.The bottom of the cup is convex to support without deformation the gas flow leaving the chamber and to favor its distribution.
Les bords de la jupe arrière du godet, à partir du fond convexe, sont à épaisseur décroissante, jusqu'à l'extrémité libre.The edges of the rear skirt of the bucket, from the convex bottom, are of decreasing thickness, up to the free end.
La partie avant du godet présente des fentes régulièrement réparties sur une circonférence pour faciliter l'ouverture de ladite partie à la sortie du caisson sous la poussée de l'air.The front part of the bucket has slots regularly distributed over a circumference to facilitate the opening of said part at the outlet of the box under the pressure of the air.
L'invention est exposée ci-après plus en détail à l'aide des dessins annexés dans lesquels :
- La figure 1 est une vue en coupe longitudinale de l'étui avant introduction de la cartouche.
- La figure 2 est une vue en coupe transversale considérée sur la ligne 2-2 de la figure 1.
- La figure 3 est une vue en coupe du godet.
- La figure 4 est une vue en coupe transversale considérée sur la ligne 4-4 de la figure 3.
- La figure 5 est une vue en coupe longitudinale de l'ensemble de la munition, le projectile étant positionné à l'intérieur du godet.
- Figure 1 is a longitudinal sectional view of the case before introduction of the cartridge.
- Figure 2 is a cross-sectional view taken on line 2-2 of Figure 1.
- Figure 3 is a sectional view of the bucket.
- Figure 4 is a cross-sectional view seen on line 4-4 of Figure 3.
- Figure 5 is a longitudinal sectional view of the entire munition, the projectile being positioned inside the bucket.
Afin de rendre plus concret l'objet de l'invention, on le décrit maintenant d'une manière non limitative en se référant aux exemples de réalisation des figures des dessins.In order to make the object of the invention more concrete, it is now described in a nonlimiting manner with reference to the exemplary embodiments of the figures of the drawings.
La munition comprend un étui (1) en matière plastique et cylindrique dont une extrémité (1a) est apte à recevoir au moins un projectile (P), tandis que l'autre extrémité présente une chambre concentrique (1b) apte à recevoir une cartouche (2) de dimension réduite. La chambre (1b) a, sur la totalité de sa longueur, un diamètre interne constant et uniforme correspondant au diamètre de la cartouche (2). Il en résulte une absence d'étranglement à la sortie de la chambre évitant la montée en haute pression et permet de réduire l'écart entre la pression primaire dans la cartouche (2) logée dans la chambre (1b) et secondaire dans le volume libre de l'étui (1) contenant le projectile.The ammunition comprises a plastic cylindrical case (1), one end (1a) of which is capable of receiving at least one projectile (P), while the other end has a concentric chamber (1b) capable of receiving a cartridge ( 2) reduced size. The chamber (1b) has, over its entire length, a constant and uniform internal diameter corresponding to the diameter of the cartridge (2). This results in an absence of throttling at the outlet of the chamber avoiding the rise in high pressure and makes it possible to reduce the difference between the primary pressure in the cartridge (2) housed in the chamber (1b) and secondary in the free volume. of the case (1) containing the projectile.
La cartouche (2) est chargée de poudre pyroxilée et reçoit une amorce (3) surchargée en composition fulminante. De ce fait, la charge de poudre pyroxilée est enflammée en totalité et instantanément par un allumage plus puissant de l'amorce renforcée.The cartridge (2) is loaded with pyroxilated powder and receives a primer (3) overloaded with fulminant composition. As a result, the charge of pyroxilated powder is ignited entirely and instantly by a more powerful ignition of the reinforced primer.
Comme le montrent les figures 3, 4 et 5, le ou les projectiles sont contenus dans un élément formant godet (4) monté à libre coulissement et centré dans l'alésage (1a) de la partie correspondante de l'étui (1). Ce godet (4) prend appui sur un épaulement (1c) formé au-dessus de la chambre recevant la cartouche (2). La partie arrière du godet (4) présente une jupe (4a) d'étanchéité et de positionnement dans l'alésage (1a) de l'étui sur l'épaulement (1c). Le fond (4b) du godet (4) est convexe pour supporter, sans déformation, le flux gazeux sortant de la chambre et favoriser ainsi sa répartition.As shown in Figures 3, 4 and 5, the projectile (s) are contained in a bucket member (4) mounted to slide freely and centered in the bore (1a) of the corresponding part of the case (1). This cup (4) is supported on a shoulder (1c) formed above the chamber receiving the cartridge (2). The rear part of the bucket (4) has a skirt (4a) for sealing and positioning in the bore (1a) of the case on the shoulder (1c). The bottom (4b) of the cup (4) is convex to support, without deformation, the gas flow leaving the chamber and thus promote its distribution.
Les bords de la jupe arrière (4a) du godet (4) à partir du fond convexe (4b), sont à épaisseur décroissante jusqu'à l'extrémité libre aux fins de répartir la pression de la colonne gazeuse sans enfoncement du godet et de son contenu.The edges of the rear skirt (4a) of the bucket (4) from the convex bottom (4b), are of decreasing thickness to the free end in order to distribute the pressure of the gas column without depressing the bucket and its content.
La partie avant du godet (4) présente des fentes (4c) régulièrement réparties sur une circonférence pour faciliter l'ouverture de ladite partie à la sortie du canon sous la poussée de l'air. Le godet (3) est en matière plastique.The front part of the bucket (4) has slots (4c) regularly distributed over a circumference to facilitate the opening of said part at the outlet of the barrel under the pressure of air. The cup (3) is made of plastic.
Le ou les projectiles (P) peuvent être réalisés à partir de corps solides en matière souple ou bien composés d'enveloppes souples contenant un liquide.The projectile (s) (P) can be produced from solid bodies of flexible material or else composed of flexible envelopes containing a liquid.
D'une manière préférée, la munition telle que décrite utilise un projectile (P) sous forme d'une balle sphérique en matière souple déformable.Preferably, the ammunition as described uses a projectile (P) in the form of a spherical bullet made of deformable flexible material.
Comme le montre la figure 2, le bord périphérique externe de la chambre (1b) et la partie correspondante de l'alésage de l'étui (1), notamment jusqu'au niveau de l'épaulement (1c), sont entretoisés par des ailettes radiales (1d).As shown in Figure 2, the outer peripheral edge of the chamber (1b) and the corresponding part of the bore of the case (1), in particular up to the level of the shoulder (1c), are braced by radial fins (1d).
Les avantages ressortent bien de la description, en particulier on souligne et on rappelle que l'amorce spéciale est surchargée en composition fulminante permettant ainsi une combustion optimum de la poudre malgré une faible pression primaire à l'intérieur de la cartouche propulsive et secondaire lorsque les gaz sont libérés dans le volume libre de l'étui principal. La munition selon l'invention utilise une charge de poudre pyroxilée sans haute pression.The advantages emerge clearly from the description, in particular it is emphasized and recalled that the special primer is overloaded with fulminant composition thus allowing optimum combustion of the powder despite a low primary pressure inside the propellant cartridge and secondary when the gases are released in the free volume of the main case. The munition according to the invention uses a charge of pyroxilated powder without high pressure.
L'invention trouve une application particulièrement avantageuse pour la propulsion de projectiles souples de diamètre important utilisés notamment pour l'auto-défense.The invention finds a particularly advantageous application for the propulsion of flexible projectiles of large diameter used in particular for self-defense.
A titre indicatif, la munition telle que décrite et illustrée peut avantageusement être utilisée dans une arme du type de celle décrite dans la Demande de Brevet N. 2.585.818.As an indication, the ammunition as described and illustrated may advantageously be used in a weapon of the type described in Patent Application No. 2,585,818.
Claims (8)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8805255 | 1988-04-13 | ||
| FR8805255A FR2630203B1 (en) | 1988-04-13 | 1988-04-13 | MUNITION FOR LOW PRESSURE PROPULSION OF LOW MASS LARGE PROJECTILES |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0337903A1 true EP0337903A1 (en) | 1989-10-18 |
Family
ID=9365508
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP89420127A Withdrawn EP0337903A1 (en) | 1988-04-13 | 1989-04-05 | Ammunition for the low-pressure launching of voluminous low-mass projectiles |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US4947752A (en) |
| EP (1) | EP0337903A1 (en) |
| FR (1) | FR2630203B1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1993023717A1 (en) * | 1992-05-15 | 1993-11-25 | Pierre Richert | Ammunition for low pressure launching of projectiles capable of being fired from large calibre guns |
| CN103712518A (en) * | 2013-12-10 | 2014-04-09 | 山西北方晋东化工有限公司 | Mechanical fire extinguishing bullet firing device launching under low chamber pressure |
| CN103706061A (en) * | 2013-12-10 | 2014-04-09 | 山西北方晋东化工有限公司 | Forest fire-fighting bomb launched by pulse pressure |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5150909A (en) * | 1991-04-04 | 1992-09-29 | Edwin Fitzwater | Air gun pellet design |
| US5361700A (en) * | 1993-12-10 | 1994-11-08 | Academy Of Applied Science | Ball-firing cartridge and method |
| US5415102A (en) * | 1994-05-13 | 1995-05-16 | White; Gary B. | Muzzle loading sabot |
| AU3226697A (en) * | 1997-06-04 | 1998-12-21 | Robert Docking | Paintball cartridges |
| GB2343240A (en) * | 1998-10-26 | 2000-05-03 | Michael Ernest Saxby | Projectiles |
| US6164209A (en) * | 1998-12-21 | 2000-12-26 | Olin Corporation | Shotshell basewad |
| SE0001588D0 (en) * | 2000-04-27 | 2000-04-27 | Comtri Ab | grenade Cartridge |
| US6763765B2 (en) * | 2001-09-27 | 2004-07-20 | Harold Crowson | Break-away gas check for muzzle-loading firearms |
| US20040231549A1 (en) * | 2003-05-20 | 2004-11-25 | Lamaster Brian Keith | Simulated ammunition for military and law enforcement training |
| US20230043486A1 (en) * | 2022-09-16 | 2023-02-09 | Dahua XIANG | High-precision spherical single-headed bullet |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR522218A (en) * | 1920-10-01 | 1921-07-28 | Jean Marie Popille | Bi-concave filling |
| FR2120612A5 (en) * | 1971-01-04 | 1972-08-18 | Cartoucherie Fse | Sporting cartridge - with one-piece base cap and detonator chamber |
| US3726218A (en) * | 1971-02-02 | 1973-04-10 | Us Army | Low velocity cartridge having total propellant ignition |
| DE2262981A1 (en) * | 1971-12-30 | 1973-07-05 | Aai Corp | CARTRIDGE ARRANGEMENT |
| US3771451A (en) * | 1972-03-10 | 1973-11-13 | Olin Corp | Low pressure ballistic system |
| US3810426A (en) * | 1973-07-09 | 1974-05-14 | Celesco Industries Inc | Gun launched training projectile |
| US3848532A (en) * | 1971-09-24 | 1974-11-19 | Aai Corp | Projectile and cartridge arrangement |
| US4103621A (en) * | 1976-07-19 | 1978-08-01 | Fackler David G | Wad column for shotshells |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3088405A (en) * | 1960-04-01 | 1963-05-07 | Alcan Company Inc | Plastic cartridge case |
| US3164092A (en) * | 1962-11-13 | 1965-01-05 | Remington Arms Co Inc | Ammunition sabot |
| US3334588A (en) * | 1965-12-01 | 1967-08-08 | Gen Precision Inc | Ammunition round |
| US3732820A (en) * | 1971-06-28 | 1973-05-15 | G Hendricks | Ball anvil primer |
| US3911824A (en) * | 1973-07-13 | 1975-10-14 | Aai Corp | Deterrent ammunition projectile |
| US3983817A (en) * | 1975-05-19 | 1976-10-05 | Remington Arms Company, Inc. | Spotting projectile |
| FR2585818B1 (en) * | 1985-08-05 | 1987-10-09 | Richert Pierre | DOUBLE LARGE CALIBER LAUNCHER WITH TILTING CANNONS |
-
1988
- 1988-04-13 FR FR8805255A patent/FR2630203B1/en not_active Expired - Lifetime
-
1989
- 1989-04-05 EP EP89420127A patent/EP0337903A1/en not_active Withdrawn
- 1989-04-11 US US07/336,248 patent/US4947752A/en not_active Expired - Lifetime
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR522218A (en) * | 1920-10-01 | 1921-07-28 | Jean Marie Popille | Bi-concave filling |
| FR23676E (en) * | 1920-10-01 | 1921-12-15 | Jean Marie Popille | Bi-concave filling |
| FR2120612A5 (en) * | 1971-01-04 | 1972-08-18 | Cartoucherie Fse | Sporting cartridge - with one-piece base cap and detonator chamber |
| US3726218A (en) * | 1971-02-02 | 1973-04-10 | Us Army | Low velocity cartridge having total propellant ignition |
| US3848532A (en) * | 1971-09-24 | 1974-11-19 | Aai Corp | Projectile and cartridge arrangement |
| DE2262981A1 (en) * | 1971-12-30 | 1973-07-05 | Aai Corp | CARTRIDGE ARRANGEMENT |
| US3771451A (en) * | 1972-03-10 | 1973-11-13 | Olin Corp | Low pressure ballistic system |
| US3810426A (en) * | 1973-07-09 | 1974-05-14 | Celesco Industries Inc | Gun launched training projectile |
| US4103621A (en) * | 1976-07-19 | 1978-08-01 | Fackler David G | Wad column for shotshells |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1993023717A1 (en) * | 1992-05-15 | 1993-11-25 | Pierre Richert | Ammunition for low pressure launching of projectiles capable of being fired from large calibre guns |
| CN103712518A (en) * | 2013-12-10 | 2014-04-09 | 山西北方晋东化工有限公司 | Mechanical fire extinguishing bullet firing device launching under low chamber pressure |
| CN103706061A (en) * | 2013-12-10 | 2014-04-09 | 山西北方晋东化工有限公司 | Forest fire-fighting bomb launched by pulse pressure |
| CN103712518B (en) * | 2013-12-10 | 2015-10-21 | 山西北方晋东化工有限公司 | The fire extinguisher bomb machinery sparking gear that a kind of low gun pressure is launched |
| CN103706061B (en) * | 2013-12-10 | 2016-06-01 | 山西北方晋东化工有限公司 | The fire-fighting bomb for forest that a kind of pulse pressure is launched |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2630203A1 (en) | 1989-10-20 |
| FR2630203B1 (en) | 1993-03-26 |
| US4947752A (en) | 1990-08-14 |
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