M4 Carbine Sights Patient in german EP0281592B1.pdf

8/14/2019 M4 Carbine Sights Patient in german EP0281592B1.pdf

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1 EP 0 281 592 B1 2Description

The invention relates to an air rifle, pistol or simi-lar weapon, comprising a breech, a barrel, a cylindri-cal housing connected to said breech opposite saidbarrel, a magazine holder, an ejector chamber, a ejec-tor means and a loading and pressure outlet tube bywhich, when loading said weapon, a cartridge isbrought into such a position that when firing theweapon the pressurized medium, via the outlet tube,is brought into contact with a cylindrical case portionof said cartridge and a pellet connected to said cylin-drical case portion will be moved through the barreloutwardly the ejector means ejecting a used cylindri-cal case portion on completion of the next loadingcycle.Such an air rifle is known from US-A-3,1 11,121.In case of this known rifle a cartridge is completelybrought into the cylindrical casing between the barreland the breech. The cartridge is formed by a cylindri-cal case portion to which a pellet or bullet head is con-nected having a rear open end and a hemi-sphericalclosed front end. This pellet being made of plastic. Inthe loaded position the pressure outlet tube is pressedagainst the rear wall of the cylindrical case portion ofthe cartridge so that only a limited sealing betweensaid outlet tube and the cartridge will be obtained dur-ing firing the weapon when the pressurized mediumhas to be brought from the pressure outlet tube intothe cylindrical case portion for moving the bullet headthrough the barrel outwardly.Obviously such a weapon and cartridge is onlysuitable to be used as a toy air rifle, as indicated insaid patent.Now the object of the invention is to eliminate thedisadvantages of the weapon described above.According to the invention an air rifle, piston or similarweapon is characterized in that said pellet is con-tained inside said cylindrical case portion of saidcartridge, said cylindrical case portion surroundingthe loading and pressure outlet tube after the pellet ismoved out of said cylindrical case portion into the bar-rel when loading the weapon, said cylindrical caseportion acting as a pressure seal during discharge ofthe weapon.

By this it is possible that the pellet is havinganother shape and can be made from metal, such aslead. During the loading of the weapon said pellet canbe pressed out of the cylindrical case portion of thecartridge and can be brought into the cylindrical cas-ing being connected to the barrel without distortion ofthe pellet. When this is done the cylindrical case por-tion of the cartridge functions as an air seal and saidcylindrical case portion is ejected during the next load-ing cycle.According to a further embodiment the compres-sion cylinder is held in the position in which the press-ure outlet tube is positioned in the cylindrical case

portion of a cartridge after loading of the weapon byeither a pressure spring or a locking catch activatedby the cocking arm at the breech.According to the invention the cartridges are con-5 tained in an exchangeable, spring-pressuredmagazine, said cartridges being brought into the load-ing position one after the other.According to a preferred embodiment the com-pression cylinder is provided with an ejection cham-10 ber cover plate formed by a partly circular elementextending from the end of the compression cylinderand protruding into the breech directly above the ejec-tion chamber during a loading position of thy weapon,an opening being present in the cover plate between15 the compression cylinder and the breech to assurethat an empty cylindrical case portion is ejected whenthe weapon is loaded.The invention relates also to a cartridge for aweapon as described above, said cartridge being

20 characterized in that a conventional diabolo or otherform of pellet is completely contained within a cylindri-cal case portion.According to a preferred embodiment the cylindri-cal case portion of the cartridge is tapered outwards25 from the inner bore to allow smooth entry of the press-ure outlet tube into it. For obtaining a good sealing be-tween the pressure outlet tube and the cylindricalcase portion of a cartridge it will be provided that saidcylindrical case portion is provided with an inner cir-30 cular groove.The invention will be described by means of thedrawings, in which:Fig. 1 shows a shortened longitudinal section ofan air rifle according to the invention;35 Fig. 2 shows a longitudinal section of a cartridgeaccording to the invention, on enlarged scale;Fig. 3 shows a detail of the ejector indicated in fig.1; andFig. 4 shows a detail of the ejector chamber.40 According to the drawing the weapon comprisesa cylindrical housing 1, the fore end of which isattached to the breech 13 in which a barrel 2 is fitted,the rear end of said housing 1 being attached to a -not shown - screw-on-block containing a trigger45 mechanism. Within the housing 1 an air compression

system is positioned comprising a sliding compres-sion tube 4 in which a spring tension operated piston5 is contained, which in Fig. 1 is shown in the positionafter firing the weapon. The breech 13 containing theso barrel 2 is machined vertically to provide a channel 20,see Fig. 3, in which a magazine 15 may fit. Above saidfirst channel 20 another channel 28 is machined, saidchannel being provided with a downward slope 10.This is the exit channel from the ejector chamber 25,55 see Fig. 4.At the front end portion 4A of the compressioncylinder 4 a tube 11 is attached, this being the air out-let tube and having the same diameter as the bore 32


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3 EP 0 281 592 B1 4of the barrel 2 and being long enough to pass from therear of the breech 13 into the barrel 2, see Fig. 1. Thecenter bore of the tube 11 passes into the compres-sion cylinder allowing air to be forced directly into thebarrel from the cylinder when the weapon is fired.Attached to the underside of the breech 13,directly below and surrounding the magazine channel20, a rectangular housing 12 is made to allow themagazine 15 to pass through it and into the breech.By means of a securing catch 14 the magazine is heldin its place. The catch is rotatably mounted on a pin16 and is spring loaded.The cartridges 19, see Fig. 2, comprise a cylindri-cal case portion 22 having a wall thickness ofapproximately 12 micrometers with a bore of 5,6 mmand with a length approximately 1,5 cm, being longerthan the pellet 21 with e.g. a length of 1 cm and adiameter of 8 mm. At the rear 30 of the bore the wallis tapered outward to allow the pressure tube 11 topass into it. On the inside, where the taper begins, andinner circular groove 23 is formed in the inner wall.When the pellet 21 is inserted into the cylindrical caseportion 22 the skirt of the pellet is received into saidgroove 23 and prevents the pellet from moving. Thecylindrical cases 22 are inserted into a spring press-ured magazine 15as with a conventional fire arm. Thespring 17 and the feed shoe 18 in the magazine 14 areheld in the compressed position by a catch, notshown, on the magazine casing until insertion into theweapon, so that then the pellets can be forced by saidspring 17 into the breech 13.During the loading procedure both the compres-sion cylinder 4 and the piston 5, connected to the rod6 are pulled to the right,as seen in Fig. 1, by meansof the side mounted cocking lever. The pressure out-let tube 11 is moved to the right also and at the sametime a cartridge 19 by means of the spring 17 forcesan empty cylindrical case 22 into the ejector chamber25. The cartridge which has to be used is held in posi-tion by the pressure of the spring 17 from below andby the underside of the empty cylindrical case 22 fromabove. At the end of the rearward travel the piston 5is engaged by the trigger unit and is held in that posi-tion. By moving the cocking lever to its forward posi-tion the compression cylinder 4 is moved forward torest against the rear of the breech 13 and the pressureoutlet tube 11 passes through the breech and entersinto the cylindrical case 22 of the cartridge 19 and for-ces the pellet 21 into the barrel 2. The cylindrical caseportion 22 is retained around the pressure outlet tube11 such that it is sealed around said outlet tube andthe front of it is forced against the barrel 2.An ejector chamber cover plate 27 is alsoattached to the compression cylinder 4 to hold theempty cylindrical case 22 in the chamber 25 until thepressure outlet tube 11 has passed into the next cylin-drical case portion 22, at which moment the ejectorchamber 25 is opened and the empty cylindrical case

22 is ejected.Said ejection is provided by a projecting portion26, see Fig. 4, mounted to the partly circular plate 27having a diameter corresponding to the width of the5 channel 20, said plate 27 being an elongation of thecompression tube 4 and having an opening 27awhich, during re-loading of the weapon, that meanswhen the pressure outlet tube 11 is brought into acartridge, is coming to lie beside the ejector chamber10 25 so that the cylindrical case portion may leave saidejector chamber.When firing the weapon piston 5 is moved bymeans of the spring 7 to the position indicated in Fig.1. By means of the air, compressed by the piston 5 the15 pellet 21 is moved through the barrel 2. When reload-ing the weapon the piston 5 is moved back again andthe spring 7 is tensioned. The compression tube 4 ismoved over a limited distance only such that thepressure outlet tube 11 of it is removed out of the

20 empty cylindrical case portion 22 so that this is movedby the next cartridge into the ejector chamber 25which is closed at that moment. Then the compres-sion tube 4 is moved forward again so that the press-ure outlet tube 11 of it is moved into a new cartridge25 and during this movement the ejector chamber 25 isopened for removal of the empty cylindrical case por-tion. To maintain the pressure outlet tube 11 in theposition shown in Fig. 1 during firing the weapon it ispossible to mount a spring 9 between the end of the30 compression tube 4 and a shoulder 8 in the housing1.

Claims35 1. Air rifle, pistol or similar weapon, comprising abreech (1 3), a barrel (2), a cylindrical housing (1) con-nected to said breech (13) opposite said barrel (2), amagazine holder (12), an ejector chamber (25), an40 ejector means (26) and a loading and pressure outlettube (4,11) by which, when loading said weapon, acartridge (19) is brought into such a position that whenfiring the weapon the pressurized medium, via theoutlet tube (11), is brought into contact with a cylindri-45 cal case portion (22) of said cartridge (19) and a pellet

(21) connected to said cylindrical case portion (22)will be moved through the barrel (2 ) outwardly theejector means (26) ejecting a used cylindrical caseportion (22) on completion of the next loading cycle,so characterised inthat said pellet (21) is contaied inside said cylindricalcase portion (22) of said cartridge (19), said cylindri-cal case portion (22) surrounding the loading andpressure outlet tube (11) after the pellet (21) is moved55 from said cylindrical case portion (22) into barrel (2)when loading the weapon, said cylindrical case por-tion (22) acting as a pressure seal during dischargeof the weapon.

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5 EP 0 281 592 B1 62. Weapon according to claim 2,characterized inthatthe compression cylinder(4) is held in the positionin which the pressure outlet tube (1 1) is positioned inthe cylindrical case portion (22) of a cartridge (19)after loading of the weapon by either a pressure

spring (9) or a locking catch activated by the cockingarm at the breech (13).3. Weapon according to claim 1 or 2,characterized inthat the cartridges (1 9) are contained in an exchange-able, spring-pressured magazine (15), said cartridges(19) being brought into the loading position one afterthe other.4. Weapon according to one of the precedingclaims,characterized inthat the compression cylinder (4) is provided with anejection chamber (25) cover plate (27) formed by apartly circular element extending from the end of thecompression cylinder (4) and protruding into thebreech (13) directly above the ejection chamber (25)during a loading position of the weapon, an opening(27a) being present in the cover plate between thecompression cylinder (4) and the breech (13) toassure that an empty cylindrical case portion (22) isejected when the weapon is loaded.5. Cartridge for a weapon according to one of thepreceding claims,characterized inthat a conventional diabolo or other form of pellet (21 )is completely contained within a cylindrical case por-tion (22).6. Cartridge according to claim 5,characterized inthat the cylindrical case portion (22) is tapered out-wards from the inner bore to allow smooth entry of thepressure outlet tube (11) into it.7. Cartridge according to claim 5 or 6,characterized inthat the cylindrical case portion (22) is provided withan inner circular groove (23).

Patentanspruche1. Windbuchse, Pistole oderdergleichen, umfas-send einen Verschluss (13), einen Lauf (2), ein zylin-drisches Gehause (1) das mit dem genanntenVerschluss (13) gegenuber dem Lauf (2) verbundenist, ein Magazin (12), eine Auswerfkammer (25), einAuswerforgan (26) und ein Lade- und Druckauslass-rohr (4,11) wodurch beim Laden der Waffe einePatrone (9) in eine derartige Position gebracht wird,dass beim Abfeuern der Waffe das Druckmediumuber das Auslassrohr (11) mit einer zylindrischenHulse (22) der Patrone (19) in Beruhrung gebrachtwird und eine mit der zylindrischen Hulse (22) verbun-

dene Kugel (21) durch den Lauf (2) nach aussenbewegt wird, wobei mittels des Auswerforgans (26) ei-ne gebrauchte zylindrische Hulse (22) beim Ausfuh-ren des folgenden Ladezyklus ausgeworfen wird,5 dadurch gekennzeichnet,dass die Kugel (21) sich innerhalb der zyklischenHulse (22) der Patrone (19) befindet, wobei die zylin-drische Hulse (22) das Lade- und Druckauslassrohr(1 1) umfasst nachdem die Kugel (21) beim Laden der10 Waffe aus der zylindrischen Hulse (22) in den Lauf (2)bewegt ist, und die zylindrische Hulse (22) beim Ent-laden der Waffe als eine Druckabdichtung wirkt.2. Waffe nach Anspruch 2,dadurch gekennzeichnet,15 dass nach Ladung der Waffe der Kompressionszylin-der(4) in derStellung gehalten wird, in der das Druck-auslassrohr (11) sich in der zylindrischen Hulse (22)einer Patrone (19) befindet, durch entweder eineDruckfeder (9) oder eine Sperrklinke, die durch den

20 Spannarm an dem Verschluss (1 3) betatigt wird.3. Waffe nach Anspruch 1 oder 2,dadurch gekennzeichnet,dass die Patronen (19) sich in einem auswechselba-ren, federbelasteten Magazin (15) befinden, welche25 Patronen (19) nach einander in die Ladestellunggebracht werden.4. Waffe nach einem der vorhergehendenAnspruche,dadurch gekennzeichnet,30 dass der Kompressionszylinder (4) mit einer Abdeck-platte (27) der Auswerfkammer (25) versehen ist, diedurch ein teilweise kreisformiges Element gebildetwird, das sich von dem Ende des Kompressionszylin-ders (4) erstreckt und wahrend einer Ladestellung der35 Waffe in den Verschluss (13) direkt oberhalb der Aus-werfkammer (25) hineinragt, wobei eine Offnung(27a) in der Abdeckplatte zwischen dem Kompres-sionszylinder (4) und dem Verschluss (13) vorgese-hen ist urn zu garantieren, dass eine leere40 zylindrische Hulse (22) ausgeworfen wird, wenn dieWaffe geladen wird.5. Patrone fur eine Waffe nach einem der vorher-gehenden Anspruche,dadurch gekennzeichnet45 dass ein gewohnliches Diabolo oder eine andereKugelform (21) sich vollstandig innerhalb einer zylin-drischen Hulse (22) befindet.6. Patrone nach Anspruch 5,dadurch gekennzeichnet,so dass die zylindrische Hulse (22) sich von der Innen-bohrung ab nach aussen verjungt urn einen glattenEingang des Druckauslassrohrs (11) in diese zueriauben.7. Patrone nach Anspruch 5 oder 6,55 dadurch gekennzeichnet,dass die zylindrische Hulse (22) mit einer kreisformi-gen Innennut (23) versehen ist.

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7 EP 0 281 592 B1 8Revendications

1. Carabine a air comprime, pistoletou similaires,comprenantune culasse (13), un canon (2), une cagecylindrique (1) reliee a la culasse (13) opposee aucanon (2), un magasin (12), une chambre d ejection(25), un moyen d ejection (26) et un tube de charge-ment et de sortie de pression (4,1 1) par qui en char-geant I arme une cartouche (19) est mise dans unetelle position qu en dechargeant I arme le milieu depression est mis en contact avec une douille cylindri-que (22) de la cartouche (1 9) via le tube de sortie (11)et une balle (21) reliee a la douille cylindrique (22)sera deplace a travers le canon (2) vers I exterieur,par le moyen d ejection (26) une douille cylindriqueemployee (22) etant ejectee en effectuant le cycle decharge suivant,caracterisee par le faitque la balle (21) se trouve dans la douille cylindrique(22) de la cartouche (19), la douille cylindrique (22)entourant le tube de chargement et de sortie de pres-sion (11), apres qu en chargeant I arme la balle (21)est deplacee de la douille cylindrique (22) dans lecanon (2), et la douille cylindrique (22) agissantcomme un etanchement de pression en dechargeantI arme.2. Arme selon la revendication 2,caracterisee par le faitqu apres le chargement de I arme le cylindre decompression (4) est maintenu dans la position danslaquelle le tube de sortie de pression (11) est placedans la douille cylindrique (22) d une cartouche (19)par un ressort de pression (9) ou un cliquet d arretactive par le bras de tension a la culasse (13).3. Arme selon la revendication 1 ou 2,caracterisee par le faitque les cartouches (1 9) se trouvent dans un magasin(15) interchangeable charge par un ressort lesditescartouches (19) etant mises I une apres I autre dansla position de chargement.4. Arme selon une des revendications preceden-tes,caracterisee par le faitque le cylindre de compression (4) est muni d une pla-que de couvrement (27) de la chambre d ejection (25)constitute par un element partiellement circulaires etendant a partir de I extremite du cylindre decompression (4) et projectant dans la culasse (13)directement au-dessus de la chambre d ejection (25)pendant une position de chargement de I arme, uneouverture (27a) etant prevue dans la plaque de cou-vrement entre le cylindre de compression (4) et laculasse (13) pourgarantirqu une douille (22) cylindri-que vide est ejectee lorsque I arme est chargee.5. Cartouche pour une arme selon une des reven-dications precedentes,caracterisee par le faitqu un diabolo usuel ou une autre forme de balle (21)

se trouve entierement dans une douille cylindrique(22).6. Cartouche selon la revendication 5,caracterisee par le fait5 que la douille cylindrique (22) est amincie vers I exte-rieur a partir du forage interieur pour permettreI entree lisse du tube de sortie de pression (11) danscelle-ci.7. Cartouche selon la revendication 5 ou 6,10 caracterisee par le faitque la douille cylindrique (22) est munie d une rainureinterieure circulaire (23).

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EP 0 281 592 B1

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M4 Carbine Sights Patient in german EP0281592B1.pdf