EP0308352B1 - Cartridge case, especially for a shotgun equipped with a smooth barrel - Google Patents
Cartridge case, especially for a shotgun equipped with a smooth barrel Download PDFInfo
- Publication number
- EP0308352B1 EP0308352B1 EP88420301A EP88420301A EP0308352B1 EP 0308352 B1 EP0308352 B1 EP 0308352B1 EP 88420301 A EP88420301 A EP 88420301A EP 88420301 A EP88420301 A EP 88420301A EP 0308352 B1 EP0308352 B1 EP 0308352B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- base portion
- cap
- base
- assembly
- case according
- 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.)
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Classifications
-
- 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
- F42B5/26—Cartridge cases
- F42B5/28—Cartridge cases of metal, i.e. the cartridge-case tube is of metal
- F42B5/285—Cartridge cases of metal, i.e. the cartridge-case tube is of metal formed by assembling several elements
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- 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
- F42B5/26—Cartridge cases
- F42B5/30—Cartridge cases of plastics, i.e. the cartridge-case tube is of plastics
- F42B5/307—Cartridge cases of plastics, i.e. the cartridge-case tube is of plastics formed by assembling several elements
- F42B5/313—Cartridge cases of plastics, i.e. the cartridge-case tube is of plastics formed by assembling several elements all elements made of plastics
Definitions
- the present invention relates to a cartridge case, in particular to a shotgun.
- these cases comprise a metal base, generally made of brass-plated steel, carrying the primer in the center of the external face of its bottom, a tubular body generally made of cardboard, or plastic material, assembled, by one of its ends, to the base and a bottom filling part or bottom part, generally made of injected or extruded plastic such as polyethylene, which is intended to improve the assembly of the tubular body with the base, to reinforce the holding of the bottom of the case and, finally, to improve gas tightness at the level of the tubular body / base assembly.
- the manufacture of the base by stamping also contributes to increasing the price of these cases.
- plastic cases have been designed in two parts, a base and a tubular body, assembled together by welding, gluing or the like.
- the bonding does not confer sufficient mechanical strength, we have been reduced to achieve this assembly by welding.
- FR-A-2 309 830 is a socket in three elements, without metal base.
- the method of manufacturing this socket consists in placing in a mold a traditional extruded tube and a bottom piece of injected plastic material and in injecting, between them, a third piece which, by overmolding the first two by the interior ensures their assembly.
- This process therefore requires a complicated overmolding operation and at high cost.
- the bead formed at the base of the tube for its attachment by the rifle extractor does not have sufficient mechanical strength, which frequently leads to shear fractures.
- the present invention aims to remedy these drawbacks.
- the tubular body has an assembly end constricted in a truncated cone
- the base has a frustoconical bore at the same angle at the top as the constricted end of the tubular body to which it is intended to serve as housing
- the bottom part has a frustoconical external profile at the same angle at the apex as the constricted end tubular body and the bore of the base, the respective dimensions of the bore of the base and the bottom part being such that after assembly, the annular interval separating them is of width slightly less than the thickness of the constricted end of the tubular body, means being provided to allow the assembly, by snap-fastening, of the base and the bottom part.
- the bottom of the base has a central circular opening and the bottom part has a cylindrical central boss of the same diameter as the opening of the bottom of the base, capable of being housed in this opening and to be retained therein, by the abovementioned snap-fit assembly means, this boss having a housing for the initiation device intended for this case.
- these snap-fit assembly means can be constituted by an annular rib and groove, of the same cross section, formed one on the cylindrical wall of the boss of the bottom piece and the other on that of the opening of the base and arranged so as to be engaged elastically one on the other when these two parts are presented to each other in the assembly position.
- the tubular body is preferably made of a semi-rigid plastic material such as high density polyethylene, giving it both mechanical characteristics of resistance to compression, tensile and shear, sufficient for its solid assembly to the base. by compression between the bottom part and the bore of the base, sufficient rigidity to hold the charge of powder and lead or other that it must contain, and very satisfactory shooting behavior.
- a semi-rigid plastic material such as high density polyethylene
- the base the collar of which borders its bottom serves as an outlet for the extractor, must be made of a rigid plastic material such as polyoxymethylene, while the bottom part must be made of a sufficiently rigid plastic material for good resistance of assembly by snap-on, but flexible enough to ensure a good seal.
- a plastic material which is perfectly suitable for the production of this part is a polyethylene or a polyamide or a polypropylene.
- the case according to the invention is of the type consisting of three plastic elements, namely a tubular body 2, a base 3 and a bottom piece 4.
- the base 3 is made of a very rigid plastic material such as polyoxymethylene.
- the bottom 3c of this base 3 also has a circular central opening 5, of cylindrical shape and comprising, projecting from its cylindrical surface, an annular rib 6 of cross section in a right triangle, so as to present, on the side of the bore conical 3b, an insertion ramp 6a and, on the side of the external face of the bottom 3c, a catch notch 6b.
- the bottom part 4, shown in FIG. 3, has a frustoconical external profile with the same angle at the top A as the constricted end 2a of the tubular body 2 and that the bore 3b of the base 3.
- This bottom piece 4 has, on the side of its end 4a of small diameter, a cylindrical boss 7 of the same diameter and the same length as the opening 5 of the bottom 3c of the base 3 which is intended to serve as housing.
- This boss 7 has an annular groove 8 of section complementary to that of the rib 6 and arranged so as to be able to be engaged one on the other when the boss 7 of the bottom part 4 is itself fully engaged in the opening 5 of the bottom 3c of the base 3.
- This arrangement allows snap-fitting assembly of the bottom part 4 to the base 3.
- the respective dimensions of the bottom piece 4 and of the bore 3b of the base 3 are determined in such a way that, when the bottom part 4 is assembled as indicated above in the base 3, there remains between the bore 3b and the bottom piece 4, a frustoconical annular space of width slightly less than the thickness of the wall of the constricted end 2a of the tubular body 2.
- This arrangement is intended to allow, by the snap-fitting assembly of the base 3 and of the bottom part 4, good anchoring of the constricted end 2a of the tubular body 2 in the aforementioned space.
- the bottom piece 4 it is advantageous for the bottom piece 4 to have a certain elasticity allowing it to compensate for the differences between the wall thickness of the constricted end 2a of the tubular body 2 and the annular thickness made to receive it.
- the bottom part 4 is advantageously made of a slightly flexible and elastic plastic material such as a polyethylene, a polyamide or a polypropylene.
- This elastic flexibility of the bottom piece 4 has, moreover, the advantage of providing an excellent seal at the level of the assembly of the three elements 2, 3 and 4.
- the flexibility and elasticity characteristics of the bottom piece 4 are improved by providing its outer wall with grooves or annular teeth 4b of triangular cross section.
- the bottom part 4 has, on the side of its large diameter end 4c and as is known per se, a frustoconical recess 9 and the boss 7 has a cylindrical central opening 11, communicating with the aforementioned recess 9 and intended to serve housing to the device for priming the cartridge formed with this case.
- the bottom part 4 is provided with an annular lip 12 bordering the inner end of the well 11 which is intended to serve as a housing for the initiation of the cartridge.
- the purpose of the presence of this lip 12 is to improve the seal against the combustion gases of the powder between the primer and the wall of the well 11, which not only improves the yield of the cartridge but also reduces the risks of expulsion of the primer.
- This case also has the advantage of allowing, with total freedom, the assembly of tubular bodies and bases of different colors, which, by adopting a specific color code, facilitates the distinction between different cartridges .
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Abstract
Description
La présente invention concerne un étui pour cartouche, notamment de fusil à canon lisse.The present invention relates to a cartridge case, in particular to a shotgun.
Actuellement, ces étuis comprennent un culot métallique, généralement en acier laitonné, portant l'amorce au centre de la face externe de son fond, un corps tubulaire généralement en carton, ou matière plastique, assemblé, par l'une de ses extrémités, au culot et une pièce de remplissage du fond ou pièce de fond, généralement en matière plastique injectée ou extrudée comme le polyéthylène, qui est destinée à améliorer l'assemblage du corps tubulaire au culot, à renforcer la tenue du fond de l'étui et, enfin, à améliorer l'étanchéité aux gaz au niveau de l'assemblage corps tubulaire/culot.Currently, these cases comprise a metal base, generally made of brass-plated steel, carrying the primer in the center of the external face of its bottom, a tubular body generally made of cardboard, or plastic material, assembled, by one of its ends, to the base and a bottom filling part or bottom part, generally made of injected or extruded plastic such as polyethylene, which is intended to improve the assembly of the tubular body with the base, to reinforce the holding of the bottom of the case and, finally, to improve gas tightness at the level of the tubular body / base assembly.
La fabrication de ces étuis nécessite l'utilisation de moyens sophistiqués propres à réaliser un sertissage annulaire à la périphérie du fond du culot pour l'obtention d'un assemblage suffisamment solide du culot avec le corps tubulaire.The manufacture of these cases requires the use of sophisticated means suitable for producing an annular crimping at the periphery of the bottom of the base in order to obtain a sufficiently solid assembly of the base with the tubular body.
La fabrication du culot par emboutissage contribue aussi à augmenter le prix de ces étuis.The manufacture of the base by stamping also contributes to increasing the price of these cases.
On connaît aussi des étuis réalisés en matière plastique en une seule pièce monobloc réalisée par moulage et extrudage ou par injection, mettant en oeuvre des moyens de production onéreux. Ces étuis en une seule pièce présentent en outre l'inconvénient d'être en une seule matière ne convenant pas aux conditions de leur utilisation qui exigent une grande souplesse à l'extrémité libre, qui doit être fermée, du corps tubulaire et une bonne rigidité de la collerette prévue à la périphérie du culot pour servir de prise à l'extracteur.There are also known cases made of plastic in a single piece made by molding and extrusion or by injection, using expensive means of production. These one-piece cases also have the disadvantage of being made of a single material which is not suitable for the conditions of their use which require great flexibility at the free end, which must be closed, of the tubular body and good rigidity. of the collar provided at the periphery of the base to serve as an outlet for the extractor.
Pour concilier ces exigences, certains fabricants ont prévu, dans cette collerette, un insert métallique annulaire qui renchérit considérablement le coût des étuis.To reconcile these requirements, some manufacturers have provided, in this collar, an annular metal insert which considerably increases the cost of the cases.
Pour remédier à cet inconvénient, on a conçu des étuis en matière plastique en deux parties, un culot et un corps tubulaire, assemblées entre elles par soudage, collage ou autre similaire. Le collage ne conférant pas une tenue mécanique suffisant, on a été réduit à réaliser cet assemblage par soudage. Pour que le soudage puisse être exécuté correctement, il est nécessaire que les températures de fusion soient voisines, ce qui réduit considérablement le choix parmi les différentes matières plastiques constitutives de ces éléments, réduisant donc aussi considérablement l'intérêt de réaliser ces étuis en deux éléments.To overcome this drawback, plastic cases have been designed in two parts, a base and a tubular body, assembled together by welding, gluing or the like. The bonding does not confer sufficient mechanical strength, we have been reduced to achieve this assembly by welding. In order for welding to be carried out correctly, it is necessary for the melting temperatures to be close, which considerably reduces the choice among the different plastics constituting these elements, thus also considerably reducing the advantage of realize these cases in two elements.
On connaît aussi, par le FR-A-2 309 830 une douille en trois éléments, sans culot métallique.Also known from FR-A-2 309 830 is a socket in three elements, without metal base.
Le procédé de fabrication de cette douille, décrit dans ce document, consiste à placer dans un moule un tube traditionnel extrudé et une pièce de fond en matière plastique injectée et à injecter, entre elles, une troisième pièce qui, en surmoulant les deux premières par l'intérieur, assure leur assemblage.The method of manufacturing this socket, described in this document, consists in placing in a mold a traditional extruded tube and a bottom piece of injected plastic material and in injecting, between them, a third piece which, by overmolding the first two by the interior ensures their assembly.
Ce procédé nécessite donc une opération de surmoulage compliquée et au coût élevé.This process therefore requires a complicated overmolding operation and at high cost.
En outre, le bourrelet formé à la base du tube en vue de son accrochage par l'extracteur du fusil ne présente pas la résistance mécanique suffisante, ce qui entraîne fréquemment des ruptures par cisaillement.In addition, the bead formed at the base of the tube for its attachment by the rifle extractor does not have sufficient mechanical strength, which frequently leads to shear fractures.
La présente invention, telle que décrite dans la revendication 1, vise à remédier à ces inconvénients. A cet effet, dans l'étui qu'elle concerne et qui est du type précité composé de trois éléments, culot, corps tubulaire et pièce de fond, en matière plastique, le corps tubulaire présente une extrémité d'assemblage rétreinte en tronc de cône, le culot présente un alésage tronconique de même angle au sommet que l'extrémité rétreinte du corps tubulaire à laquelle il est destiné à servir de logement et la pièce de fond présente un profil extérieur tronconique de même angle au sommet que l'extrémité rétreinte du corps tubulaire et que l'alésage du culot, les dimensions respectives de l'alésage du culot et de la pièce de fond étant telles qu'après assemblage, l'intervalle annulaire les séparant est de largeur légèrement inférieure à l'épaisseur de l'extrémité rétreinte du corps tubulaire, des moyens étant prévus pour permettre l'assemblage, par encliquetage, du culot et de la pièce de fond.The present invention, as described in
Suivant une forme d'exécution simple de l'invention, le fond du culot présente une ouverture circulaire centrale et la pièce de fond présente un bossage central cylindrique de même diamètre que l'ouverture du fond du culot, apte à être logée dans cette ouverture et à y être retenue, par les moyens d'assemblage par encliquetage précités, ce bossage présentant un logement pour le dispositif d'amorçage destiné à cet étui.According to a simple embodiment of the invention, the bottom of the base has a central circular opening and the bottom part has a cylindrical central boss of the same diameter as the opening of the bottom of the base, capable of being housed in this opening and to be retained therein, by the abovementioned snap-fit assembly means, this boss having a housing for the initiation device intended for this case.
Par exemple, ces moyens d'assemblage par encliquetage peuvent être constitués par une nervure et une gorge annulaires, de même section transversale, ménagées l'une sur la paroi cylindrique du bossage de la pièce de fond et l'autre sur celle de l'ouverture du culot et disposées de manière à être engagées élastiquement l'une sur l'autre lorsque ces deux pièces sont présentées l'une à l'autre en position d'assemblage.For example, these snap-fit assembly means can be constituted by an annular rib and groove, of the same cross section, formed one on the cylindrical wall of the boss of the bottom piece and the other on that of the opening of the base and arranged so as to be engaged elastically one on the other when these two parts are presented to each other in the assembly position.
Le corps tubulaire est, de préférence, en une matière plastique semi-rigide telle que le polyéthylène haute densité, lui conférant à la fois des caractéristiques mécaniques de résistance à la compression, à la traction et au cisaillement, suffisantes pour son assemblage solide au culot par compression entre la pièce de fond et l'alésage du culot, une rigidité suffisante pour la tenue de la charge de poudre et de plomb ou autre qu'il doit contenir, et un comportement au tir très satisfaisant..The tubular body is preferably made of a semi-rigid plastic material such as high density polyethylene, giving it both mechanical characteristics of resistance to compression, tensile and shear, sufficient for its solid assembly to the base. by compression between the bottom part and the bore of the base, sufficient rigidity to hold the charge of powder and lead or other that it must contain, and very satisfactory shooting behavior.
Le culot, dont la collerette qui borde son fond sert de prise à l'extracteur, doit être en une matière plastique rigide telle que le polyoxyméthylène, tandis que la pièce de fond doit être réalisée en une matière plastique suffisamment rigide pour une bonne tenue de l'assemblage par encliquetage, mais suffisamment souple pour assurer une bonne étanchéité. Une matière plastique convenant parfaitement à la réalisation de cette pièce est un polyéthylène ou encore un polyamide ou un polypropylène.The base, the collar of which borders its bottom serves as an outlet for the extractor, must be made of a rigid plastic material such as polyoxymethylene, while the bottom part must be made of a sufficiently rigid plastic material for good resistance of assembly by snap-on, but flexible enough to ensure a good seal. A plastic material which is perfectly suitable for the production of this part is a polyethylene or a polyamide or a polypropylene.
D'autres caractéristiques selon l'invention sont décrites dans les sous-revendications.Other features according to the invention are described in the subclaims.
De toute façon, l'invention sera bien comprise à l'aide de la description qui suit, en référence au dessin schématique annexé représentant, à titre d'exemple non limitatif, une forme d'exécution de cet étui :
- Figures 1 à 3 sont des vues de côté en élévation, avec demi-coupe axiale, respectivement du corps tubulaire, du culot et de la pièce de fond ;
- Figure 4 est une vue en coupe axiale de l'étui après assemblage par encliquetage de ses éléments constitutifs, la pièce de fond n'étant pas coupée ;
- Figure 5 est une vue en coupe axiale montrant une variante d'exécution de la pièce de fond.
- Figures 1 to 3 are side elevation views, with axial half-section, respectively of the tubular body, the base and the bottom part;
- Figure 4 is an axial sectional view of the case after snap-fitting of its constituent elements, the bottom part not being cut;
- Figure 5 is an axial sectional view showing an alternative embodiment of the bottom part.
Comme indiqué précédemment, l'étui selon l'invention est du type constitué de trois éléments en matière plastique, à savoir un corps tubulaire 2, un culot 3 et une pièce de fond 4.As indicated above, the case according to the invention is of the type consisting of three plastic elements, namely a
Le corps tubulaire 2, représenté sur la figure 1, qui, pour les raisons explicitées ci-après, est en une matière plastique semi-rigide telle que du polyéthylène haute densité, présente une extrémité d'assemblage 2a rétreinte en tronc de cône d'angle au sommet A de l'ordre de 10 à 15°.The
Le culot 3, représenté sur la figure 2, qui, de manière connue, comporte une collerette périphérique 3a destinée à l'accrochage de l'extracteur qui assure l'arrachage de l'étui hors de la chambre arpès la percussion, présente un alésage tronconique 3b de même angle au sommet A que l'extrémité rétreinte du corps tubulaire 2.The
En raison non seulement des caractéristiques mécaniques qu'il doit présenter dans sa partie alésée mais également du rôle que doit jouer sa collerette 3a, le culot 3 est en une matière plastique très rigide telle que le polyoxyméthylène.Due not only to the mechanical characteristics which it must have in its bored part but also to the role which its flange 3a must play, the
Le fond 3c de ce culot 3 présente aussi une ouverture centrale circulaire 5, de forme cylindrique et comportant, en saillie sur sa surface cylindrique, une nervure annulaire 6 de section transversale en triangle rectangle, de manière à présenter, du côté de l'alésage conique 3b, une rampe d'introduction 6a et, du côté de la face externe du fond 3c, un cran d'accrochage 6b.The
La pièce de fond 4, représentée sur la figure 3, présente un profil extérieur tronconique de même angle au sommet A que l'extrémité rétreinte 2a du corps tubulaire 2 et que l'alésage 3b du culot 3. Cette pièce de fond 4 présente, du côté de son extrémité 4a de petit diamètre, un bossage cylindrique 7 de même diamètre et de même longueur que l'ouverture 5 du fond 3c du culot 3 qui est destinée à lui servir de logement. Ce bossage 7 présente une gorge annulaire 8 de section complémentaire de celle de la nervure 6 et disposée de manière à pouvoir être engagées l'une sur l'autre lorsque le bossage 7 de la pièce de fond 4 est lui-même totalement engagé dans l'ouverture 5 du fond 3c du culot 3.The
Cette disposition permet un assemblage par encliquetage de la pièce de fond 4 au culot 3.This arrangement allows snap-fitting assembly of the
Les dimensions respectives de la pièce de fond 4 et de l'alésage 3b du culot 3 sont déterminées de telle manière que, lorsque la pièce de fond 4 est assemblée comme indiqué précédemment au culot 3, il subsiste, entre l'alésage 3b et la pièce de fond 4, un espace annulaire tronconique de largeur légèrement inférieure à l'épaisseur de la paroi de l'extrémité rétreinte 2a du corps tubulaire 2. Cette disposition a pour but de permettre, par l'assemblage par encliquetage du culot 3 et de la pièce de fond 4, un bon ancrage de l'extrémité rétreinte 2a du corps tubulaire 2 dans l'espace précité.The respective dimensions of the
A cet effet, il est intéressant que la pièce de fond 4 présente une certaine élasticité lui permettant de compenser les différences entre l'épaisseur de paroi de l'extrémité rétreinte 2a du corps tubulaire 2 et l'épaisseur annulaire ménagée pour la recevoir. Pour cette raison, la pièce de fond 4 est avantageusement en une matière plastique légèrement souple et élastique telle qu'un polyéthylène, un polyamide ou un polypropylène. Cette souplesse élastique de la pièce de fond 4 présente, en outre, l'avantage de procurer une excellente étanchéité au niveau de l'assemblage des trois éléments 2, 3 et 4. Les caractéristiques de souplesse et d'élasticité de la pièce de fond 4 sont améliorées en procurant à sa paroi externe des stries ou dents annulaires 4b de section transversale triangulaire. En outre, en orientant les dents annulaires 4b en direction de l'extrémité de petit diamètre 4a de la pièce de fond 4 comme montré sur le dessin, on améliore la retenue de l'extrémité rétreinte 2a du corps tubulaire 2 dans l'espace annulaire ménagé entre la pièce de fond 4 et l'alésage 3b du culot 3.To this end, it is advantageous for the
La pièce de fond 4 présente, du côté de son extrémité de grand diamètre 4c et comme cela est connu en soi, un évidement tronconique 9 et le bossage 7 présente une ouverture centrale cylindrique 11, communiquant avec l'évidement 9 précité et destinée à servir de logement au dispositif d'amorçage de la cartouche constituée avec cet étui.The
Dans la variante d'exécution illustrée sur la figure 5, la pièce de fond 4 est munie d'une lèvre annulaire 12 bordant l'extrémité intérieure du puits 11 qui est destiné à servir de logement à l'amorce de la cartouche. La présence de cette lèvre 12 a pour but d'améliorer l'étanchéité aux gaz de combustion de la poudre entre l'amorce et la paroi du puits 11, ce qui non seulement améliore le rendement de la cartouche mais encore diminue les risques d'expulsion de l'amorce.In the alternative embodiment illustrated in FIG. 5, the
On conçoit aisément qu'en raison des facilités de fabrication par moulage, injection ou autre de ses trois composants ainsi qu'en raison de la simplicité de leur assemblage, cet étui est d'un prix de revient très peu élevé, tout en présentant de meilleures garanties de fonctionnement que les étuis traditionnels, notamment en raison de l'étanchéité de l'assemblage des trois éléments constitutifs et de la nature de leurs composants.It is easily understood that because of the ease of manufacture by molding, injection or other of its three components as well as because of the simplicity of their assembly, this case is of a very low cost price, while presenting better operating guarantees than traditional cases, in particular due to the tightness of the assembly of the three constituent elements and the nature of their components.
Cet étui présente aussi l'avantage de permettre, avec une totale liberté, l'assemblage de corps tubulaires et de culots de différentes couleurs, ce qui, par l'adoption d'un code de couleur déterminé, facilite la distinction entre des cartouches différentes.This case also has the advantage of allowing, with total freedom, the assembly of tubular bodies and bases of different colors, which, by adopting a specific color code, facilitates the distinction between different cartridges .
Claims (9)
- A cartridge case, particularly for a smoothbore gun, of the type comprising three elements made of mouldable or injectable plastics material, i.e. a tubular member (2), a cap (3) and a base portion (4), characterised in that the tubular member (2) has an assembly end (2a) which is constricted in a truncated conical configuration, the cap (3) having a truncated-conical bore (3b) with the same angle at the peak (A) as the constricted end (2a) of the tubular member (2) for which it is intended to serve as a housing, and the base portion (4) has a truncated conical external profile with the same angle at the peak (A)_ as the constricted end (2a) of the tubular member (2), and in that the bore (3b) of the cap (3), the respective dimensions of the bore (3b) of the cap (3) and of the base portion (4) are such that, after assembly, the annular space separating them is of a width slightly less than the thickness of the constricted end (2a) of the tubular member (2), means being provided to permit assembly, by latching, of the cap (3) and of the base portion (4).
- A case according to Claim 1, characterised in that the base (3c) of the cap (3) has a central circular opening (5), and the base portion (4) has a central cylindrical boss (7) of the same diameter as the opening (5) in the base (3c) of the cap (3), capable of being lodged in this opening and of being retained there, by the aforementioned means of assembly by latching, this boss (7) having a housing (11) for the detonator device intended for this case.
- A case according to Claim 2, characterised in that the means of assembly by latching of the cap (3) and of the base portion (4) are composed of an annular rib (6) and throat (8) of the same cross-section, one (8) fitted on the cylindrical wall of the boss (7) of the base portion (4), and the other (6) on that of the opening (5) in the cap (3) and disposed in such a way as to be engaged elastically one upon the other when these two pieces (3, 4) are presented to one another in the assembly position.
- A case according to any one of Claims 1 to 3, characterised in that the base portion (4) has, projecting on its truncated conical wall, annular striations or teeth (4b).
- A case according to Claim 4, characterised in that the annular striations or teeth (4b) of the base portion (4) have a triangular cross-section and are oriented towards its small-diameter end (4c).
- A case according to any one of the foregoing Claims, characterised in that the tubular member (2) is made of a semi-rigid plastics material such as high-density polyethylene.
- A case according to any one of the foregoing Claims, characterised in that the cap (3) is made of an extremely rigid plastics material such as polyoxymethylene.
- A case according to any one of the foregoing Claims, characterised in that the base portion (4) is made of a slightly flexible and resilient plastics material, such as a polyethylene, a polyamide or a polypropylene.
- A case according to Claim 8, characterised in that the base portion (4) has an annular lip (12) surrounding the internal end of the well (11) intended to serve as a housing for the detonator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT88420301T ATE85113T1 (en) | 1987-09-11 | 1988-09-06 | CARTRIDGE CASING, ESPECIALLY FOR SMOOTH-BARREL RIFLES. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8712997 | 1987-09-11 | ||
| FR8712997A FR2620527B1 (en) | 1987-09-11 | 1987-09-11 | CASE FOR CARTRIDGE, ESPECIALLY A SMOOTH CANNON RIFLE |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0308352A1 EP0308352A1 (en) | 1989-03-22 |
| EP0308352B1 true EP0308352B1 (en) | 1993-01-27 |
Family
ID=9355060
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP88420301A Expired - Lifetime EP0308352B1 (en) | 1987-09-11 | 1988-09-06 | Cartridge case, especially for a shotgun equipped with a smooth barrel |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0308352B1 (en) |
| AT (1) | ATE85113T1 (en) |
| CA (1) | CA1324914C (en) |
| DE (1) | DE3877872D1 (en) |
| ES (1) | ES2037864T3 (en) |
| FR (1) | FR2620527B1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5969288A (en) * | 1997-05-07 | 1999-10-19 | Cheddite France | Cartridge case, especially for a smooth bore gun |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1113479A (en) * | 1954-11-03 | 1956-03-29 | Union Ind Ct Sud | Process for manufacturing sockets or similar cylindrical capacities |
| US3359906A (en) * | 1965-12-20 | 1967-12-26 | Herter Inc S | Shotshell base wad |
| CH458996A (en) * | 1966-03-09 | 1968-06-30 | Suisse D Explosifs Cheddite Sa | Case for cartridges |
| US3722412A (en) * | 1971-01-11 | 1973-03-27 | Herters Inc | All polyethylene shotshell case |
| FR2126516A5 (en) * | 1971-02-09 | 1972-10-06 | Lefebvre Pierre | Plastic cartridge case - of thermoplastic resin eg low pressure polyethylene |
| FR2199860A6 (en) * | 1971-02-09 | 1974-04-12 | Gmt Sa | Plastic cartridge case - with reflector type internal wall |
| ES211994Y (en) * | 1975-04-29 | 1976-11-01 | IMPROVED CARTRIDGE. | |
| DE2548599A1 (en) * | 1975-10-30 | 1977-05-05 | Dynamit Nobel Ag | Shotgun cartridge case with plastic sleeve and separate base - fixed together by partially shrinking sleeve into recesses in base |
| BE859068A (en) * | 1977-09-27 | 1978-03-28 | Herstal Sa | SOCKET FOR HUNTING CARTRIDGE IN SYNTHETIC MATERIAL |
-
1987
- 1987-09-11 FR FR8712997A patent/FR2620527B1/en not_active Expired - Fee Related
-
1988
- 1988-09-06 EP EP88420301A patent/EP0308352B1/en not_active Expired - Lifetime
- 1988-09-06 DE DE8888420301T patent/DE3877872D1/en not_active Expired - Lifetime
- 1988-09-06 AT AT88420301T patent/ATE85113T1/en not_active IP Right Cessation
- 1988-09-06 ES ES198888420301T patent/ES2037864T3/en not_active Expired - Lifetime
- 1988-09-09 CA CA000576969A patent/CA1324914C/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5969288A (en) * | 1997-05-07 | 1999-10-19 | Cheddite France | Cartridge case, especially for a smooth bore gun |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2620527B1 (en) | 1993-09-10 |
| ES2037864T3 (en) | 1993-07-01 |
| CA1324914C (en) | 1993-12-07 |
| FR2620527A1 (en) | 1989-03-17 |
| EP0308352A1 (en) | 1989-03-22 |
| DE3877872D1 (en) | 1993-03-11 |
| ATE85113T1 (en) | 1993-02-15 |
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