(19)
(11)EP 3 535 542 B1

(12)EUROPEAN PATENT SPECIFICATION

(45)Mention of the grant of the patent:
06.05.2020 Bulletin 2020/19

(21)Application number: 17713856.7

(22)Date of filing:  16.03.2017
(51)Int. Cl.: 
F42B 5/24  (2006.01)
(86)International application number:
PCT/US2017/022732
(87)International publication number:
WO 2018/084892 (11.05.2018 Gazette  2018/19)

(54)

FIREARM CLEANING SHELL

REINIGUNGSHÜLSE FÜR FEUERWAFFE

CARTOUCHE DE NETTOYAGE D'ARME À FEU


(84)Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

(30)Priority: 01.11.2016 US 201615340400

(43)Date of publication of application:
11.09.2019 Bulletin 2019/37

(73)Proprietor: Midwest Outdoor Holdings LLC
Commerce Township, Michigan 48390 (US)

(72)Inventor:
  • WHITWORTH, James
    Commerce Township, Michigan 48390 (US)

(74)Representative: Suominen, Kaisa Liisa 
Moosedog Oy Rykmentintie 2B
20810 Turku
20810 Turku (FI)


(56)References cited: : 
US-A1- 2014 109 791
US-B1- 8 051 776
US-A1- 2016 258 705
  
      
    Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention).


    Description

    TECHNICAL FIELD



    [0001] The present disclosure relates to a device for removing material such as carbon, lead, metals, and plastic contaminants from the bore of a firearm, and more particularly relates to a projectile having a fibrous cup filled with a dense, viscous paste or granulated material, wherein the material within the cup deforms in a radial, outward direction when the projectile is fired down the bore.

    BACKGROUND



    [0002] The statements in this section merely provide background information related to the present disclosure. Accordingly, such statements are not intended to constitute an admission of prior art.

    [0003] Cleaning the bore of a firearm after use is generally required to prevent possible damage due to corrosion to the bore. It is often true that the task of manually cleaning a firearm is most undesirable when the condition of the firearm is most suitable for bore damage; for example at the end of an outing under inclement conditions. The task of manually cleaning the bore of a firearm is time consuming and may require disassembly of the firearm. Therefore there is a need among users of firearms for a convenient, quick, easily used and effective device for cleaning a bore of moisture, powder residue and foreign material which contributes to the corrosion within a bore until a more complete manual cleaning may be accomplished. A bore cleaning device according to the known art is disclosed in US 8,051,776 B1.

    [0004] Embodiments are known in the art to propel material down the barrel of a firearm to clean the bore of the gun. These devices, however, rely on compacted wadding to sufficiently wipe down the inner wall of the bore as they travel therethrough. To fit within a shell capable of being fired from a particular firearm inherently requires that the wadding and other materials be compacted to be smaller in rough diameter than the bore they are intended to clean. This results in an ineffectively cleaning of the bore as portions of the bore are not wiped by the intended cleaning components.

    [0005] Further, these devices also generally comprise stacked layers of wadding and other materials which are either pre-moistened with a cleaner or lubricant which reduces the shelf life of product.

    SUMMARY



    [0006] An apparatus is disclosed including a bore cleaning device configured to clean a bore of a firearm. The device includes a propellant providing a force to push the projectile down the bore of the firearm, a fibrous cup, a dense material within the fibrous cup, and a frame including a bore forward disk configured to press against a bottom surface of the fibrous cup. The dense material includes one of a dense granulated material and a dense, viscous paste. The dense material is configured to deform and press radially outwardly against the cup as the propellant provides propelling force to the dense material.

    BRIEF DESCRIPTION OF THE DRAWINGS



    [0007] One or more embodiments will now be described, by way of example, with reference to the accompanying drawings, in which:

    FIG. 1 illustrates an exemplary bore cleaning device in side view, in accordance with the present disclosure;

    FIG. 2 illustrates the bore cleaning device of FIG. 1 in cross-section, in accordance with the present disclosure;

    FIG. 3 illustrates the components of the bore device of FIG. 2 removed from the shell case, in accordance with the present disclosure;

    FIG. 4 illustrates an alternative frame to the frame of FIG. 3, in accordance with the present disclosure;

    FIG. 5 illustrates a fibrous cup filled with an exemplary alternative dense material, such as a metallic paste, in accordance with the present disclosure;

    FIG. 6 illustrates exemplary cleaning materials including slots cut from a center hole to an outer surface and configured to be installed to bending legs of a frame, in accordance with the present disclosure;

    FIG. 7 illustrates a fibrous pad including slots cut in an outer surface of the pad to facilitate cleaning of a rifled bore, in accordance with the present disclosure;

    FIG. 8 illustrates a fibrous pad including notches cut in an outer surface of the pad to facilitate cleaning of a rifled bore, in accordance with the present disclosure;

    FIGS. 9-11 are illustrated in cross-section, showing a bore cleaning device being propelled down the bore of a firearm, in accordance with the present disclosure;

    FIG. 9 illustrates bore cleaning device situated within a bore of a firearm in an unfired state;

    FIG. 10 illustrates the bore cleaning device of FIG. 9 shortly after the device is transitioned to the fired state, with the metallic paste beginning to deform and press outwardly upon the cup; and

    FIG. 11 illustrates the bore cleaning device of FIG. 10 at some later point further down the bore; and

    FIG. 12 illustrates an optional construction including interaction between the cup and the frame of FIG. 11 with increased scale, showing an exemplary frame including a narrow bore forward disk enabling the cup to bend backward into a gap between the disk and the surface of the bore, in accordance with the present disclosure.


    DETAILED DESCRIPTION



    [0008] An improved bore cleaning device is disclosed, including a frame and a fibrous cup situated in a bore-forward position to the frame, wherein the fibrous cup is filled with one of a dense granular material and a dense, viscous paste / viscous liquid material or both a dense granular material and viscous paste or liquid. In a bore-rearward direction to the frame, a propellant, once ignited, provides a sudden and dramatic propelling force to the frame, which, in turn, provides a similarly dramatic force to the cup located at the bore-forward position. The dense material in the cup, being one of a dense granular material and/or a dense viscous material, upon receiving the sudden and dramatic force, tends to flatten out. As a result of the initially stationary dense material tending to stay at rest, the accelerative force applied to the dense material causes the dense material to flow in a bore-rearward direction, thereby providing a radially outward force, pushing the fibrous material into intimate contact with the inside surfaces of the bore. This intimate contact between the fibrous cup and the inside surfaces of the bore, as the cup is being forced down the bore, wipes the inside surface of the bore, with contaminants being loosened and swept along the bore with the fibrous cup.

    [0009] The fibrous cup can be used in isolation of other cleaning surfaces on the projectile, with the cup being the only cleaning surface in contact with the inside of the bore. In another embodiment, the frame can include additional cleaning features that continue to wipe the inside surface of the bore as the frame follows the fibrous cup down the bore. In one exemplary construction, the frame can include a disk at one terminal end of the frame, another disk at the other terminal end of the frame, and legs connected between the disks, wherein the legs are configured to bend when a propulsive force is applied to one of the disks. By wrapping or placing cleaning materials, such as scrubbing or wiping materials, around the legs that are configured to bend, the bending legs can include an outward / radial displacement that forces intimate contact between the cleaning materials and the inside of the bore.

    [0010] Cleaning materials that can be wrapped or placed around the bending legs can include disk or cylinder shaped cleaning materials. One exemplary scrubbing material can be a fibrous pad rigid enough to hold its form when no propelling force is acting upon the scrubbing material and yet pliable enough to expand outwardly/radially by an exemplary 1-8mm when acted upon by the bending legs.

    [0011] A disk shaped or cylindrically shaped scrubbing pad can have a hole in the center for the bending legs, in an unbent or resting state, to be inserted therethrough in an assembly process for the projectile. In another embodiment, the scrubbing pad can additionally include a longitudinal slot, so that the scrubbing pad can be fitted through the slot over the bending legs. In one embodiment, the scrubbing material can be formed with an outer shape of a cylinder. In one embodiment, wherein the projectile is configured for use in a firearm having a rifled barrel, a plurality of longitudinal slots or notches can be cut in the outer surface of the cylindrical shape. These outwardly facing slots or notches form small corners in the material, permitting the scrubbing pad material in the small corners to penetrate into recesses in the rifling that would normally not be reached by a cylindrical pad without the notches or slots.

    [0012] Referring now to the drawings, wherein the showings are for the purpose of illustrating certain exemplary embodiments only and not for the purpose of limiting the same, FIG. 1 illustrates an exemplary bore cleaning device in side view. Bore cleaning device 10 includes shell case 20 and brass head or casing 27. Bore cleaning device 10 includes an exemplary device configured to imitate a shotgun shell and clean the bore of a shotgun, which can include a smooth bore (for example, used with bird shot) or a rifled bore (for example, used with a rifled deer slug.) It will be appreciated that a similar device using embodiments of the disclosed device can be configured for use in an exemplary 9mm handgun or an exemplary 0.223 caliber rifle, and the disclosure is not intended to be limited to the particular shotgun configuration in the illustrated embodiments. Viewed from the outside, device 10 including shell case 20 and brass head 27 can look very similar to a shotgun shell of the same caliber as ammunition for the same firearm to be cleaned. In another embodiment, shell case 20 can be transparent or translucent, both for aesthetic or marketing purposes and/or to prevent a user from confusing the bore cleaning device with live ammunition.

    [0013] Internal components of bore cleaning device 10 are illustrated with dotted lines. Shell case end portion 22 includes material of shell case 20 pressed into an end similar to ends of ammunition rounds, the end portion 22 holding the components of device 10 within shell case 20 until the device is fired or activated within a firearm. Components of the device include fibrous cup 30, frame 40, cleaning materials 50, 52, 54, 60, 62, and 64, and propellant 70. Frame 40 includes a first disk 42, a second disk 44 longitudinally containing the cleaning materials therebetween.

    [0014] FIG. 2 illustrates the bore cleaning device of FIG. 1 in cross-section. Bore cleaning device 10 includes fibrous cup 30 filled with dense, granular material, frame 40, cleaning materials 50, 52, 54, 60, 62, and 64, gas seal 71, propellant 70, and primer 72. Primer 72 is configured to provide a spark to propellant 70 when the primer is struck by a firing pin. Propellant 70 can include gunpowder, although some types of gunpowder are not ideal as they can introduce contaminants to the inside of the bore as the device is propelled through the bore. Propellant 70 can include chemical compositions known in the art configured to rapidly or explosively expand as a spark is introduced.

    [0015] Fibrous cup 30 is a cup constructed of fibrous material. The material can include fibrous paper, recycled material, high temperature resistant material (capable of withstanding excess of 400 degrees F or 200 degrees C) and/or a durable/flexible tapered cup. The material can be selected to avoid condensation within the device. Cup 30 is filled with a dense granular and/ or dense viscous material. Exemplary dense materials can include but are not limited to lead, zinc, iron, copper, colloidal suspensions, and metallic or ceramic pastes. Dense materials useful for the disclosed device ideally deforms as the device 10 transitions from an unfired state in the chamber of a firearm to a fired state speeding down the bore of the firearm. This deformation is created by the inertial forces inherent to the dense material. The dense material needs to deform in a rearward bore direction in relation to the cup, such that the deforming material pushes in a radially outward direction, pushing the fibrous cup against the inner surface of the bore of the firearm. This radially outward force against the cup forces the fibrous material of the cup to create intimate contact with the bore, such that the fibrous material scrubs and loosens debris from the inner surface of the bore.

    [0016] Cup 30 of FIG. 2 is filled with exemplary lead spheres 100, each roughly 0.8-1.5 mm thick. Spheres of this size enable the spheres 100 to move easily against each other such that the required deformation is achieved. Larger spheres would fail to flow against each other and would act more like a solid weight in cup 30, which would fail to cause intimate contact between the cup and the bore. Smaller spheres would tend to displace within the device, falling out of the cup and down the sides of the device, thereby making spheres 100 ineffective for the required deformation and outward force upon cup 30.

    [0017] Device 10 can include a rigid frame that is primarily configured to transfer force from expanding propellant 70 to cup 30. In the embodiment of FIG. 2, frame 40 includes a first disk 42, a second disk 44, and four legs 46 connecting the two disks 42 and 44. Legs 46 are defined by open slot 45 between the legs. Legs 46 are configured such that when the propellant provides a strong propelling force upon disk 44, the frame 40 is compressed and legs 46. As legs 46, they extend sideways or in a radially outward direction in relation to the inside surface of a bore of a firearm. Cleaning materials 50, 52, 54, 60, 62, and 64 are wrapped or positioned around legs 46. As legs 46 bend and push radially outward, the cleaning materials are pushed against the inside surface of the bore of the gun. When second disk 44 is narrower than the bore of the firearm to be cleaned, a charge plug 71 can be added to seal behind the frame 40 and provide a surface for the force of the propellant to push against. In one embodiment, two legs 46 are formed with disk 42, and two legs are formed with disk 44, and the disks each include small cavities configured to receive small snapping features on the ends of the legs of the other disk.

    [0018] FIG. 3 illustrates the components of the bore device of FIG. 2 removed from the shell case. Lead spheres 100 are illustrated ready to be provided within cup 30. Frame 40 is illustrated, with cleaning materials 110 including fibrous cylindrically shaped pads 50, 52, and 54 and rubberized wiper disks 60, 62, and 64 removed from frame 40.

    [0019] FIG. 4 illustrates an alternative frame to the frame of FIG. 3. Frame 200 is illustrated including frame body 201 and a separable forward disk 210. Frame body 201 includes rearward disk 220 and bending legs 230 and 232. Bending legs 230 and 232 are defined by slot 250 therebetween and knee portions 240. Frame body 201 include forward end 202 configured to be inserted within receiving cavity 212 of forward disk 210. With forward disk 210 installed to frame body 201, frame 200 functions similarly or identically to frame 40 of FIG. 3. Rearward disk 220 can be a solid round disk. In the exemplary embodiment of FIG. 4, rearward disk 220 can be segmented in two half circles, such that the split between the two half circles helps the connected legs 230 and 232 to widen more easily when the propelling force is applied.

    [0020] FIG. 5 illustrates a fibrous cup filled with an exemplary alternative dense material, such as a metallic paste. Cup 30 is filled with a metallic paste which is dense, with a similar density to lead or a similar material. The paste is viscous, meaning that it includes a flow resistance, but it is not so viscous that it will not deform when fired down the bore of a firearm.

    [0021] FIG. 6 illustrates exemplary cleaning materials including slots cut from a center hole to an outer surface and configured to be installed to bending legs of a frame. Fibrous pad 160 is formed in the shape of a cylinder. Pad 160 includes center hole 164 and slot 162 connecting center hole 164 to an outside surface of pad 160. Rubberized wiper disk 170 is illustrated including center hole 174 and slot 172 connecting center hole 174 to an outside surface of wiper 170. Slots 162 and 172 are configured such that pad 160 and wiper 170, respectively, can be slid over bending legs of a frame.

    [0022] FIG. 7 illustrates a fibrous pad including slots cut in an outer surface of the pad to facilitate cleaning of a rifled bore. Fibrous pad 180 includes center hole 184. Slots 182 are illustrated around a perimeter of pad 180 but do not cut all the way through the material of pad 180, such that the pad remains intact. FIG. 8 illustrates a fibrous pad including notches cut in an outer surface of the pad to facilitate cleaning of a rifled bore. Fibrous pad 190 includes center hole 194. Notches 192 are illustrated around a perimeter of pad 190 but do cut all the way through the material of pad 180, such that the pad remains intact.

    [0023] FIGS. 9-11 are illustrated in cross-section, showing a bore cleaning device being propelled down the bore of a firearm. FIG. 9 illustrates bore cleaning device 200 situated within bore 202 of firearm 204 in an unfired state. Device 200 includes rigid frame 210, cup 30, and metallic paste 150 within cup 30. FIG. 10 illustrates the bore cleaning device of FIG. 9 shortly after the device is transitioned to the fired state, with the metallic paste beginning to deform and press outwardly upon the cup. Bore cleaning device 200 includes rigid frame 210 and cup 30 filled with metallic paste 150. Very rapid acceleration of device 200 down bore 202 deforms paste 150 such that surface 152 of paste 150 moves in a bore rearward direction in relation to cup 30. This rearward deformation of paste 150 forces the paste to push radially outwardly against cup 30, such that cup 30 is pressed against bore 202. FIG. 11 illustrates the bore cleaning device of FIG. 10 at some later point further down the bore. As the bore cleaning device 200 continues to accelerate down bore 202, paste 150 continues to deform, surface 152 continues to move in a bore rearward direction relative to cup 30, and paste 150 continues to create an outward force, pushing cup 30 against bore 202.

    [0024] FIG. 12 illustrates an optional construction including interaction between the cup and the frame of FIG. 11 with increased scale, showing an exemplary frame including a narrow bore forward disk enabling the cup to bend backward into a gap between the disk and the surface of the bore. Firearm 204 is illustrated including bore 202. Bore forward disk 212 of frame 210 of FIG. 11 is illustrated, wherein the disk is narrower in diameter than the diameter of bore 202. As a result, gap 213 exists between the surface of bore 202 and disk 212. Dense paste 150 is contained within fibrous cup 30. As the device moves down bore 202, the dense paste 150 pushes material of the fibrous cup 30 into a curved backward portion 31. It will be appreciated that by permitting portion 31 to curve backward into gap 213, the gap being created by using a bore forward disk with a diameter substantially less than the bore of the firearm, the scrubbing force applied by cup 30 against the surface of bore 202 can be increased.

    [0025] Frames for the present device can be constructed of many different materials, including but not limited to polyethylene and other common plastics.
    The disclosure has described certain embodiments and modifications of those embodiments. Further modifications and alterations may occur to others upon reading and understanding the specification. Therefore, it is intended that the disclosure not be limited to the particular embodiment(s) disclosed as the best mode contemplated for carrying out this disclosure, but that the disclosure will include all embodiments falling within the scope of the appended claims.


    Claims

    1. An apparatus comprising a bore cleaning device (10, 200) configured to clean a bore (202) of a firearm (204), the device comprising:

    a propellant (70) providing a force to push the projectile down the bore of the firearm;

    a fibrous cup (30);

    a dense material within the fibrous cup, the dense material comprising one of a dense granulated material and a dense, viscous paste, wherein the dense material is configured to deform and press radially outwardly against the cup as the propellant provides propelling force to the dense material; and

    a frame (40, 200, 210) comprising a bore forward disk (210, 212) configured to press against a bottom surface of the fibrous cup.


     
    2. The apparatus of claim 1, wherein the dense material comprises metallic spheres.
     
    3. The apparatus of claim 2, wherein the metallic spheres (100) are constructed with lead.
     
    4. The apparatus of claim 2, wherein the metallic spheres each have a diameter of 0.8mm to 1.5mm.
     
    5. The apparatus of claim 1, wherein the dense material comprises one of a metallic paste (150) and a ceramic paste.
     
    6. The apparatus of claim 1, wherein the dense material comprises the paste comprising a colloidal suspension.
     
    7. The apparatus of claim 1, wherein the forward disk comprises a diameter less than a diameter of the fibrous cup (30).
     
    8. The apparatus of claim 1, wherein the frame (40, 200, 210) further comprises:

    a bore rearward disk (220);

    a plurality of legs (46, 230, 232) between the bore forward disk (210, 212) and the bore rearward disk, wherein the legs are configured to bend and press outward against the bore when the force to push the projectile down the bore is applied to the frame; and

    further comprising cleaning materials (50, 52, 54, 60, 62, 64) wrapped around the legs of the frame.
     
    9. The apparatus of claim 8, wherein the cleaning materials (50, 52, 54, 60, 62, 64) comprise a cylindrically-shaped fibrous pad (160, 180, 190).
     
    10. The apparatus of claim 9, wherein the fibrous pad (160, 180, 190) comprises slots (182) in an outer surface of the pad configured to clean a rifled bore.
     
    11. The apparatus of claim 9, wherein the fibrous pad (160, 180, 190) comprises notches in an outer surface of the pad configured to clean a rifled bore.
     
    12. The apparatus of claim 8, wherein the cleaning materials (50, 52, 54, 60, 62, 64) comprise a rubberized wiper disk (60, 62, 64, 170).
     
    13. The apparatus of claim 1, wherein the frame (40, 200, 210) is a rigid frame.
     
    14. The apparatus of claim 8, wherein the frame (40,200,210) comprises four legs (46, 230, 232).
     


    Ansprüche

    1. Vorrichtung, umfassend eine Bohrungsreinigungsvorrichtung (10, 200), die zum Reinigen einer Bohrung (202) einer Feuerwaffe (204) konfiguriert ist, wobei die Vorrichtung umfasst:

    ein Treibmittel (70), das eine Kraft bereitstellt, um das Geschoss durch die Bohrung der Feuerwaffe nach unten zu drücken;

    einen faserigen Becher (30);

    ein dichtes Material innerhalb des faserigen Bechers, wobei das dichte Material entweder ein dichtes granuliertes Material oder eine dichte, viskose Paste umfasst, wobei das dichte Material so konfiguriert ist, dass es sich verformt und radial nach außen gegen den Becher drückt, wenn das Treibmittel dem dichten Material eine Vortriebskraft verleiht; und

    einen Rahmen (40, 200, 210), der eine gebohrte vordere Scheibe (210, 212) umfasst, die so konfiguriert ist, dass sie gegen eine Bodenoberfläche des faserigen Bechers drückt.


     
    2. Vorrichtung nach Anspruch 1, wobei das dichte Material metallische Kugeln umfasst.
     
    3. Vorrichtung nach Anspruch 2, wobei die metallischen Kugeln (100) aus Blei hergestellt sind.
     
    4. Vorrichtung nach Anspruch 2, wobei die metallischen Kugeln jeweils einen Durchmesser von 0,8 mm bis 1,5 mm aufweisen.
     
    5. Vorrichtung nach Anspruch 1, wobei das dichte Material eine aus einer metallischen Paste (150) und einer keramischen Paste umfasst.
     
    6. Vorrichtung nach Anspruch 1, wobei das dichte Material die Paste umfasst, die eine kolloidale Suspension umfasst.
     
    7. Vorrichtung nach Anspruch 1, wobei die vordere Scheibe einen Durchmesser aufweist, der kleiner ist als ein Durchmesser des faserigen Bechers (30).
     
    8. Vorrichtung nach Anspruch 1, wobei der Rahmen (40, 200, 210) ferner umfasst:

    eine hintere Bohrungsscheibe (220);

    eine Vielzahl von Schenkeln (46, 230, 232) zwischen der vorderen Bohrungsscheibe (210, 212) und der hinteren Bohrungsscheibe, wobei die Schenkel so konfiguriert sind, dass sie sich biegen und nach außen gegen die Bohrung drücken, wenn die Kraft, mit der das Geschoss durch die Bohrung nach unten gedrückt wird, auf den Rahmen ausgeübt wird; und

    ferner umfassend Reinigungsmaterialien (50, 52, 54, 60, 62, 64), die um die Schenkel des Rahmens gewickelt sind.


     
    9. Vorrichtung nach Anspruch 8, wobei die Reinigungsmaterialien (50, 52, 54, 60, 62, 64) ein zylindrisch geformtes faseriges Polster (160, 180, 190) umfassen.
     
    10. Vorrichtung nach Anspruch 9, wobei das faserige Polster (160, 180, 190) Schlitze (182) in einer äußeren Oberfläche des Polsters aufweist, die so konfiguriert sind, dass sie eine gezogene Bohrung reinigen.
     
    11. Vorrichtung nach Anspruch 9, wobei das faserige Polster (160, 180, 190) Kerben in einer äußeren Oberfläche des Polsters aufweist, die so konfiguriert sind, dass sie eine gezogene Bohrung reinigen.
     
    12. Vorrichtung nach Anspruch 8, wobei die Reinigungsmaterialien (50, 52, 54, 60, 62, 64) eine gummierte Wischerscheibe (60, 62, 64, 170) umfassen.
     
    13. Vorrichtung nach Anspruch 1, wobei der Rahmen (40, 200 210) ein starrer Rahmen ist.
     
    14. Vorrichtung nach Anspruch 8, wobei der Rahmen (40, 200, 210) vier Schenkel (46, 230, 232) umfasst.
     


    Revendications

    1. Appareil comprenant un dispositif de nettoyage d'alésage (10, 200) configuré pour nettoyer un alésage (202) d'une arme à feu (204), le dispositif comprenant :

    un propulseur (70) fournissant une force pour pousser le projectile vers le bas de l'alésage de l'arme à feu ;

    une coupelle fibreuse (30) ;

    un matériau dense au sein de la coupelle fibreuse, le matériau dense comprenant l'un parmi un matériau granulé dense et une pâte visqueuse dense, dans lequel le matériau dense est configuré pour se déformer et presser radialement vers l'extérieur contre la coupelle lorsque le propulseur fournit une force de propulsion au matériau dense ; et

    un cadre (40, 200, 210) comprenant un disque avant d'alésage (210, 212) configuré pour s'appliquer contre une surface inférieure de la coupelle fibreuse.


     
    2. Appareil selon la revendication 1, dans lequel le matériau dense comprend des sphères métalliques.
     
    3. Appareil selon la revendication 2, dans lequel les sphères métalliques (100) sont constituées de plomb.
     
    4. Appareil selon la revendication 2, dans lequel les sphères métalliques ont chacune un diamètre de 0,8 mm à 1,5 mm.
     
    5. Appareil selon la revendication 1, dans lequel le matériau dense comprend l'une d'une pâte métallique (150) et d'une pâte céramique.
     
    6. Appareil selon la revendication 1, dans lequel le matériau dense comprend la pâte comprenant une suspension colloïdale.
     
    7. Appareil selon la revendication 1, dans lequel le disque avant comprend un diamètre inférieur à un diamètre de la coupelle fibreuse (30).
     
    8. Appareil selon la revendication 1, dans lequel le cadre (40, 200, 210) comprend en outre :

    un disque arrière d'alésage (220) ;

    une pluralité de pattes (46, 230, 232) entre le disque avant d'alésage (210, 212) et le disque arrière d'alésage, dans lequel les pattes sont configurées pour se courber et s'appuyer vers l'extérieur contre l'alésage lorsque la force pour pousser le projectile vers le bas de l'alésage est appliquée au cadre ; et

    comprenant en outre des matériaux de nettoyage (50, 52, 54, 60, 62, 64) enroulés autour des pattes du cadre.


     
    9. Appareil selon la revendication 8, dans lequel les matériaux de nettoyage (50, 52, 54, 60, 62, 64) comprennent un coussinet fibreux de forme cylindrique (160, 180, 190).
     
    10. Appareil selon la revendication 9, dans lequel le coussinet fibreux (160, 180, 190) comprend des fentes (182) dans une surface extérieure du coussinet configurées pour nettoyer un alésage strié.
     
    11. Appareil selon la revendication 9, dans lequel le coussinet fibreux (160, 180, 190) comprend des rainures dans une surface extérieure du coussinet configurées pour nettoyer un alésage strié.
     
    12. Appareil selon la revendication 8, dans lequel les matériaux de nettoyage (50, 52, 54, 60, 62, 64) comprennent un disque d'essuyage caoutchouté (60, 62, 64, 170).
     
    13. Appareil selon la revendication 1, dans lequel le cadre (40, 200, 210) est un cadre rigide.
     
    14. Appareil selon la revendication 8, dans lequel le cadre (40, 200, 210) comprend quatre pattes (46, 230, 232).
     




    Drawing





















    REFERENCES CITED IN THE DESCRIPTION



    This list of references cited by the applicant is for the reader's convenience only. It does not form part of the European patent document. Even though great care has been taken in compiling the references, errors or omissions cannot be excluded and the EPO disclaims all liability in this regard.

    Patent documents cited in the description