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US20190249943A1 - Silencer device for firearm - Google Patents

Silencer device for firearm Download PDF

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Publication number
US20190249943A1
US20190249943A1 US16/329,319 US201716329319A US2019249943A1 US 20190249943 A1 US20190249943 A1 US 20190249943A1 US 201716329319 A US201716329319 A US 201716329319A US 2019249943 A1 US2019249943 A1 US 2019249943A1
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United States
Prior art keywords
barrel
mobile
firearm
flap
silencer device
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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.)
Abandoned
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US16/329,319
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English (en)
Inventor
Antonio Barcherini
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BREVEX SA
Original Assignee
BREVEX SA
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Publication date
Application filed by BREVEX SA filed Critical BREVEX SA
Assigned to BREVEX SA reassignment BREVEX SA ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BARCHERINI, Antonio
Publication of US20190249943A1 publication Critical patent/US20190249943A1/en
Abandoned legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
    • F41A21/00—Barrels; Gun tubes; Muzzle attachments; Barrel mounting means
    • F41A21/30—Silencers

Definitions

  • the present invention relates to a silencer device for a firearm, in particular for a rifle or another long or short firearm, and to a method for silencing a firearm.
  • the present invention relates more specifically to a silencer for a firearm, such as a rifle or another long or short firearm.
  • the invention proposes a method for silencing a firearm, in particular a rifle or another firearm, when a shot is fired.
  • the invention proposes a firearm, in particular a rifle, including an improved silencer device.
  • the conventional silencer also referred to as a noise regulator, which can be added to a firearm, gas weapon or air gun and which is aimed at mechanically reducing noise.
  • publication WO 96/03612 discloses a noise moderating device for rifles for clay pigeon shooting or other recreational activities, having superposed barrels of all calibres.
  • This firearm silencer is formed by a tubular encasement that is mounted on the barrel of the gun and includes an annular decompression chamber to the rear of said tubular encasement, as well as a series of internal cross baffles held by spacers and equipped with orifices allowing the passage of the lead shots and the wad.
  • the silencer is intended to dampen the noise and thus reduce noise pollution.
  • WO 2011/035111 A1 and WO 2014/000805 disclose further examples of firearm silencers, in particular for automatic rifles or another long or short firearm, including a silencer mounted on the barrel of the firearm, wherein a muzzle brake, which can be connected by screwing to the silencer, is fixed to the barrel.
  • a conventional silencer or noise regulator is a device that can be added to a firearm, gas weapon or air gun in order to reduce the noise and light flash produced thereby when a shot is fired, thus making the weapon in question more stealthy.
  • the silencer generally takes the form of a cylindrical tube able to be adapted to the mouth of the barrel, and the internal mechanism of said tube, which mechanism varies depending on the ammunition used, makes it possible to reduce the pressure of gases used to propel the projectile, so as to mitigate their release into the atmosphere to the greatest possible extent.
  • the silencer Since the silencer merely slows the gas at the outlet of the barrel, it has no effect on the noise produced by the passage of the projectile at supersonic speed (speed greater than the speed of sound, which is approximately 340 m/s in air at 15° C.), which, by exceeding the sound barrier, in turn produces detonation noise over its path.
  • the phenomenon is sensitive above all on initial high-speed calibres, such as 5.56 mm.
  • subsonic munitions created specifically for use with a silencer in order to minimise the sound of a shot being fired.
  • a silencer is above all a comfort tool because it reduces the muzzle wave of a firearm.
  • This muzzle wave is the cause of ENT traumas, in the ear, nose and throat area, which the usual means (ear plugs, helmets, etc.) cannot provide protection against.
  • the sound propagates exactly at 1,482.343 m/s in pure water at 20° C., approximately at 340 m/s in air at 15° C., and at around 1,500 m/s in seawater.
  • the effectiveness of silencers is relative: the noise reducer suppresses the muzzle wave and consequently the subsequent detonation and makes the noise thereof more diffuse whilst suppressing the flame at the mouth of the weapon.
  • the term noise regulator is sometimes used; the performance of this type of device varies greatly depending on the type of noise reducer employed and the weapon used. The shorter the distance at which the shot can be heard, the more difficult it is to identify it as a shot from a firearm, and the more difficult it is to locate due to the distortion of the noise and also the absence of a visible flame.
  • the magnitude of the noise is reduced by the order of 25 to 35 dB in the case of an assault rifle, that is to say it is 115 to 125 dB (comparable to a pneumatic drill) instead of 150 dB.
  • the conventional silencers whilst being provided in different forms and utilising different techniques, are nevertheless all rather similar. They are generally constituted by sleeves that are fixed to the end of the barrel, either by a bayonet system or by a threaded screw.
  • These sleeves include a plurality of gas expansion chambers in their interior, which make it possible to attenuate the noise of the detonation with varying levels of success.
  • the projectile, the gases and the residual sound wave exit via the mouth.
  • the diameter of the holes separating the various elements of the silencer through which the projectiles pass is much larger than the calibre, they allow some of the gases to escape to the front of the projectile, thus interfering with the accuracy of the projectile and reducing the speed thereof approximately by 4 to 6 m/s.
  • the conventional silencer is costly, is difficult to maintain (it must be completely disassembled, part by part, for cleaning) and, for some rifle models, its lifetime is less than 800 shots.
  • the projectile As it passes through the various baffles, the projectile allows the gases behind it to expand in the cells, thus reducing the magnitude of the sound wave.
  • a silencer of this kind is down to two factors: its dimensions (the larger it is, the more it damps), and the distance separating it from the combustion chamber (the greater the distance, the greater the effectiveness). Since the silencer is situated at the end of the barrel, the longer the length of said barrel, the more effective the silencer will be, therefore. Furthermore, there is practically no effect at all if the silencer is used with weapons having a very short barrel, unless the silencer is greatly oversized.
  • the reduction of the noise is dependent on the size of the chambers (cells).
  • the noise normally produced by the detonation of a firearm is approximately from 120 to 170 dB.
  • a sudden noise or extended exposure to excessive ambient noise (beyond 100 dB) may cause a temporary or permanent change to a person's hearing.
  • the object of the invention is to provide an improved silencer device for a firearm, in particular for a rifle or another long or short firearm.
  • the aim of the present invention is therefore to propose a device for eliminating and completely preventing the noise produced when a shot is fired by allowing it to deplete naturally, thus resulting in greater stealth.
  • the aim of the device is therefore to inhibit the sound wave (the noise) generated by the ammunition of a firearm.
  • the silencer device for a firearm has the features of the characterising part of claim 1 .
  • the aforementioned silencer device comprises:
  • the barrel is temporarily sealed with the aid of the closing flap mechanism just after the passage of the projectile, and the combustion gases and the sound wave are redirected towards an expansion space for their final processing.
  • the actuation unit includes a mobile portion ( 31 ) of the barrel, said portion being moved by the projectile as soon as said projectile has fully passed the flaps, and extended by a rod connected to the control ring.
  • a small portion of the barrel is made mobile.
  • the portion can be an end or middle portion.
  • the part is pushed axially forwards in the downstream portion ( 38 ) of the barrel by the pressure of the gases within the barrel.
  • the axial movement of the mobile part ( 31 ) causes the flaps to close by means of the coupling of the amplitude lever arm ( 8 ) to the closing flap mechanism ( 10 ).
  • the mobile part will be a middle part at the very least on long firearms.
  • the mobile portion is a middle portion, it is joined to the portion of the barrel exiting from the flap seats and the end portion of the barrel.
  • the interior of the barrel (in which the projectile moves) is deconstructed into three perfectly aligned portions.
  • the mobile part has a covering portion and a covered portion.
  • the mobile portion In its covering portion, the mobile portion covers the barrel, and in its covered portion it is covered by the final portion of the barrel.
  • the length of the portion of the barrel that passes through the seat of the flaps in principle has a fixed length equal to the length of the bullet.
  • the mobile part reproduces the portion of the barrel that exits from the flaps and is covered in turn.
  • the final part of the barrel that is mounted on the seats of the flaps contains the mobile part in full.
  • the final portion of the barrel can be very short.
  • the mobile portion is an end portion
  • said final portion forms the mouth of the barrel.
  • the mobile portion is preferably cylindrical and rather short
  • the mobile portion preferably has the forms, the patterns and the length of a traditional choke.
  • the control mechanism preferably includes a guide and transmission ring capable of sliding over the barrel, the ring cooperating with the rod of the mobile portion so as to transmit the movement to the lever arms.
  • the closing flap(s) is/are preferably disposed in a seat placed across the axis of the barrel and are of a predetermined length and, if there are two flaps, are slightly offset from one another along the axis of the barrel, such that they partially overlap one another in the closed position without contacting one another.
  • each flap includes an opening for receiving the end of the amplitude lever arm so as to transmit the pivoting movement of the amplitude lever and actuate the flap in a transverse direction relative to the axis of the barrel.
  • the guide ring preferably further comprises two wedge-shaped support parts having an angled-edge surface directed towards the flaps for enabling the actuation of the lever arms pivoting on the pivots and the closure of the flaps.
  • control mechanism includes a first return spring associated with the guide ring such that said guide ring can resume its initial position, lowering the pressure of the gases.
  • the exhaust unit also comprises an expansion space connected to said at least one exhaust pipe so as to receive the gases transported by said at least one exhaust pipe, the expansion space including vents for discharging the combustion gases from the expansion space.
  • the expansion space preferably comprises an inner tube connected to flaps capable of sealing the vents, in which tube the gases enter the expansion space via an opening made in the inner tube once said tube has been pushed to its end position and has thus sealed the vents, and, as the pressure reduces, the inner tube resumes its starting position owing to a return spring, thus allowing the combustion gases to be discharged from the expansion space via the vents when the sound wave has depleted naturally.
  • the mobile portion of the substantially cylindrical actuation unit joins a portion of the barrel that passes through the seat of the closing flaps and an end portion of the barrel, and includes a covering portion and a covered portion separated by a shoulder, the covering cylindrical portion being able to cover the portion of the barrel that passes through the seat of the flaps, and the covered cylindrical portion being able to be covered by the end portion of the barrel.
  • the final portion of the barrel comprises a receptacle including a first cylindrical portion able to receive the covering portion of the mobile part, and a second cylindrical portion of a smaller diameter able to receive the covered portion of the mobile part, the first cylindrical portion and the second cylindrical portion of the end portion being separated by a shoulder.
  • the first cylindrical portion of the end portion is longer than the covering cylindrical portion of the mobile part so as to allow the axial movement of the mobile part, the second cylindrical portion of the end portion being substantially the same length as the covered cylindrical portion of the mobile part.
  • the covering portion of the mobile part has an inner diameter corresponding to the outer diameter of the portion of the barrel that passes through the seat, and has an outer diameter corresponding to the inner diameter of the first cylindrical portion of the end portion.
  • the mobile portion of the substantially cylindrical actuation unit forms the end portion of the barrel and includes a covering portion and a final portion separated by a shoulder, the covering cylindrical portion of the mobile part being able to cover a portion of the barrel that passes through the seat of the closing flaps, and the end portion forming the mouth of the barrel.
  • the covering portion of the mobile part comprises a receptacle including a cylindrical portion capable of receiving the cylindrical portion of the barrel that passes through the seat of the flaps and of enabling the axial movement of the mobile part, the cylindrical portion of the barrel being substantially the same length as the covering cylindrical portion of the mobile part.
  • the covering portion of the mobile part has an inner diameter corresponding to the outer diameter of the portion of the barrel that passes through the seat of the flaps.
  • the mobile part at the end of the barrel forms a choke of which the inner diameter decreases in the direction of the mouth of the barrel, the covering cylindrical portion covering the barrel, and the end portion including an inner conical portion having a maximum diameter that is equal to the inner diameter of the barrel and narrows towards the outlet zone of the barrel.
  • a second pair of flaps independent of the first ones is disposed at the outlet of the cartridge chamber and can be placed on automatic or semi-automatic weapons; these flaps actuated mechanically by separate discharge/reloading devices of the weapon serve to prevent combustion gases, the sound wave and the flash exiting via the open breech when the cartridge shell is ejected.
  • This variant using a second pair of flaps for automatic or semi-automatic weapons, can be used alone for simple modification of a weapon without resorting to the silencer, which, for its part, requires at least the replacement or the modification of the barrel.
  • the silencer device for a firearm in particular for a rifle or another long or short firearm, includes: at least one closing flap mounted across the axis on the barrel of the firearm in order to temporarily seal the barrel after a projectile has passed and prevent the passage of the combustion gases and the sound wave towards the mouth of the barrel when a shot is fired,
  • the invention proposes a long or short firearm, in particular a rifle, comprising a silencer device of the aforementioned type, in which the barrel of the firearm comprises a fixing system formed by said pivots and a seat disposed across the axis of the barrel, said seat receiving said closing flap mechanism so as to fix the silencer device to the barrel removably.
  • the invention proposes a method for silencing a firearm, in particular a rifle or for another firearm, when a shot is fired, the method comprising the following steps:
  • the barrel is temporarily sealed with the aid of one or more closing flaps just after the passage of the projectile, and the combustion gases and the sound wave are redirected towards an expansion space for their final processing.
  • the first sound wave is that produced by the combustion of the explosive charge.
  • the second is the famous “bang” produced by the projectile as it passes the sound barrier, which is the case for approximately 96% of ammunition. This “bang” occurring inside the barrel is not certain, but assumed; however, it is certain that it is never produced outside the barrel. To the human ear these two sound waves are perceived to be a single noise.
  • the third sound wave is produced with the exit of the projectile from the barrel, similar to a whiplash in the air. Said third sound has a magnitude of from 72 to 80 dB and cannot in any way be controlled.
  • the combustion of the powder gives off an immediate heat of from 2500 to 3000° C., as well as 2-2.5 grams of gas which, not compressed, give a volume of approximately 1.12 m 3 .
  • the sound wave produced by the combustion and the bang moves (at this temperature) at approximately 1500-1800 m/s (immediate speed) whereas the projectile is still in a phase of acceleration and reaches its maximum speed only after having travelled a distance of approximately 60 cm.
  • the sound wave has three properties of interest: the first is that, when it encounters an obstacle, it rebounds (echo phenomenon), the second is that it does not propagate in a vacuum, and the third and most interesting for the silencer device of the present invention is that it has a short life. It is therefore not possible in any way to store a sound wave: by preventing it from propagating it disappears.
  • the sound wave does not stick to the projectile. Upon striking it, the wave rebounds to the rear of the breech, which for its part returns the wave towards the projectile. It passes back and forth endlessly between these two obstacles, until the projectile exits via the mouth of the barrel, at variable speed depending on the temperature of the medium through which it passes and that of the gases carrying it. The sound wave then propagates in the air at the exit of the barrel.
  • the silencer of the present invention allows it to completely deplete naturally and manages to eliminate it completely by keeping the sound inside the barrel for a very short time.
  • the silencer device for a firearm of the present invention is advantageous in terms of weight (approximately 50 g in total), manufacturing cost and effectiveness. According to the invention, the sound wave produced within the barrel is completely destroyed because it is retained behind the flap(s).
  • the silencer device for a firearm of the present invention allows the sound wave to deplete naturally and above all deals with the pressure generated by the gases. If there were no escape provided by an exhaust pipe, the gases would remain compressed within the barrel, keeping the flap(s) closed. They would expand solely at the opening of the rifle, without posing any danger but with some disadvantages.
  • FIG. 1 shows a silencer device for a firearm in an embodiment of the invention
  • FIG. 2 is a partial side view in cross-section of the device as shown in FIG. 1 ,
  • FIG. 3 is a side view of the device as shown in FIG. 1 prior to being assembled
  • FIG. 4 is a partial side view of the part 38 of the device as shown in FIG. 1 ,
  • FIG. 5 is a partial side view in cross section of the part 38 of the device as shown in FIG. 1 ,
  • FIG. 6 is a partial side view of the device as shown in FIG. 1 .
  • FIG. 7 is a partial side view of the device as shown in FIG. 1 .
  • FIG. 8 shows a silencer device for a firearm in another embodiment of the invention
  • FIG. 9 is a partial side view in cross-section of the device as shown in FIG. 8 .
  • FIG. 10 is a partial side view in cross-section of the device as shown in FIG. 8 .
  • FIG. 11 shows a silencer device for a firearm in another embodiment of the invention
  • FIG. 12 is a partial side view of the device as shown in FIG. 11 .
  • FIG. 13 is a side view of an exhaust unit of the silencer device for a firearm in an embodiment of the invention.
  • FIG. 1 shows a silencer device for a firearm in an embodiment of the invention.
  • two closing flaps ( 10 ) are mounted across the axis on the barrel of the firearm in order to temporarily seal the barrel after a projectile has passed and to prevent the passage of the combustion gases and the sound wave towards the mouth of the barrel ( 42 ) when a shot is fired.
  • the closing flaps ( 10 ) are disposed in a seat ( 37 ) placed across the axis of the barrel and are of a predetermined length and are slightly offset from one another along the axis of the barrel, such that they partially overlap one another in the closed position without contacting one another.
  • the control mechanism ( 6 ) includes two amplitude lever arms ( 8 ) mounted on pivots ( 7 ) so as to allow a transverse movement of the two closing flaps ( 10 ) between an open position, in which the flaps ( 10 ) allow a projectile to pass towards the mouth of the barrel, and a closed position, which prevents the passage of the combustion gases and the sound wave after the projectile has passed.
  • the exhaust unit ( 11 ) includes two exhaust pipes ( 11 ) arranged upstream from the closing flaps ( 10 ) in order to redirect the combustion gases and the sound wave and allow them to be discharged from the barrel ( 42 ).
  • the control mechanism ( 6 ) is positioned upstream from the flaps ( 10 ).
  • the control mechanism ( 6 ) actuates the amplitude lever arms ( 8 ), which close the flaps ( 10 ), thus allowing the gases to be discharged via the pipes ( 11 ).
  • the flaps ( 10 ) (and their seat 37 ) are preferably disposed across the axis of the barrel ( 42 ) and are of a predetermined length and are slightly offset from one another along the axis of the barrel, such that they partially overlap one another in the closed position without contacting one another.
  • each flap ( 10 ) includes an opening for receiving the end of the amplitude lever arm ( 8 ) so as to transmit the pivoting movement of the amplitude lever ( 8 ) and actuate the flap ( 10 ) in a transverse direction relative to the axis of the barrel ( 42 ).
  • the element ( 6 ) of the actuation mechanism is moved in a direction generally parallel to the axis of the barrel ( 42 ).
  • control mechanism ( 6 ) includes a guide ring ( 6 ) that is capable of sliding over the barrel and is connected to the rod of the mobile portion of the barrel ( 31 ) so as to transmit the movement to the lever arms ( 8 ).
  • the guide ring ( 6 ) also includes two support parts disposed laterally to the axis of the barrel ( 42 ), each forming an elongate opening for receiving the end of one of the lever arms ( 8 ) and including an angled-edge (rectilinear or curvilinear) guide surface directed towards the flaps ( 10 ) for enabling the actuation of the lever arms ( 8 ) pivoting on the pivots ( 7 ) in order to close and open the flaps ( 10 ).
  • the guide ring ( 6 ) includes two wedge-shaped support parts disposed laterally to the axis of the barrel ( 42 ) and having an angled-edge (rectilinear or curvilinear) surface directed towards the flaps ( 10 ) for enabling the actuation of the lever arms ( 8 ) pivoting on the pivots ( 7 ) in order to close and open the flaps ( 10 ).
  • the two flaps ( 10 ) close the barrel once the bullet has passed through, such that the sound wave and the gases are redirected towards an expansion space.
  • a second pair of flaps can be used to close the barrel from the outset in the case of automatic or semi-automatic weapons.
  • the control ring ( 6 ) is actuated by the passage of the projectile after the flaps in a small portion ( 31 ) of the barrel which is mobile and connected to the control ring ( 6 ) by a rod. This portion ( 31 ) of the barrel (of the same calibre as the barrel) is placed after the flaps ( 10 ) at a distance therefrom equal to the length of the body of the projectile (without any potential tip).
  • This part ( 31 ) is mobile and moves by approximately 0.5 mm, which serves to close the flaps ( 10 ) immediately after the passage of the bullet.
  • the proportion of the amplitude levers is dependent on the calibre of the firearm, the maximum being 10 for a single-barrel or superposed .12 calibre, and 20 for a juxtaposed (lateral) .12 calibre, because for this firearm it is necessary to have a single flap ( 10 ).
  • the parts ( 31 , 6 , 8 and 10 ) are repositioned into the normal position by a return spring ( 32 ).
  • the control mechanism ( 6 ) comprises a transmission rod and the mobile portion ( 31 ) includes a coupling assembly ( 34 - 36 ) for moving the control ring ( 6 ).
  • the coupling assembly ( 34 - 36 ) comprises a connection arm ( 34 ) fixed to the mobile portion ( 31 ) by a connection screw ( 35 ) and attached to the transmission rod by a bolt and nut ( 36 ).
  • FIGS. 6 and 7 are partial side views of the device as shown in FIG. 1 , the elongate opening formed in the transmission rod allows axial adjustment of the position of the rod relative to the connection arm ( 34 ) and to the mobile portion ( 31 ) by tightening of the nut ( 36 ).
  • the transmission rod is positioned in a direction generally parallel to the axis of the barrel defining the direction of the projectile. As the projectile passes a defined point, the mobile portion ( 31 ) is actuated axially and allows the transmission of the movement to the control mechanism ( 6 ) by coupling to the coupling assembly ( 34 - 36 ) and to the transmission rod.
  • the control mechanism ( 6 ) having the rod is connected to the return spring ( 32 ) disposed on an anchor ( 33 ) for attachment to the barrel. As the axial force on the part ( 31 ) decreases, the rod and the control mechanism ( 6 ) resume their initial position thanks to the return spring ( 32 ).
  • the device can be incorporated in the weapon at the time of its manufacture, or can be added to an existing weapon in the form of extensions to the existing barrel(s), or in the form of an extension of the barrel(s) after shortening thereof.
  • the addition is made by screwing, soldering, a nested configuration or any other means.
  • the part ( 31 ) as an extension of the barrel, is mobile, its start being situated after the flaps ( 10 ) at a precise distance corresponding to the length of the body of the projectile.
  • the projectile imparts an axial movement thereon, which actuates the entire device and causes the flaps ( 10 ) to close completely and immediately.
  • the gases and the sound wave are thus redirected via the exhaust ( 11 ) in order to be processed.
  • the projectile continues its course in the portion ( 38 ) of the weapon, i.e. the extension of the barrel.
  • the axial force produced on the part ( 31 ) by the projectile is far greater than the needs of the device, it is possible to reduce said force by carefully increasing the diameter of said part ( 31 ), which is in principle of the same calibre as the barrel, or by adding a spring (not shown) around the straight portion of the part ( 31 ) that re-enters the part ( 38 ), or both.
  • the part ( 31 ) does not contact the end of the part ( 38 ) that receives it.
  • the mobile part ( 31 ) is in the middle of the barrel.
  • This mobile part ( 31 ) is joined to the portion of the barrel ( 42 ) exiting the seats ( 37 ) of the flaps ( 10 ) and the end portion ( 38 ) of the barrel.
  • This mobile part ( 31 ) is cylindrical and comprises an inner bore capable of allowing the passage of a bullet.
  • the interior of the barrel in which the projectile moves is deconstructed into three portions ( 42 , 31 , 38 ) which must be perfectly aligned.
  • the cylindrical mobile part ( 31 ) includes a covering portion and a covered portion separated by a shoulder.
  • the mobile part ( 31 ) covers the barrel ( 42 ), and in its covered cylindrical portion it is covered by the final portion of the barrel ( 38 ).
  • the length of the portion of the barrel ( 42 ) that passes through the seat ( 37 ) of the flaps ( 10 ) has a fixed length equal to the length of a bullet for this type of weapon. If the portion of the part ( 31 ) were to be covered instead of being covering, it could then recede inside the portion ( 42 ) and thereby prevent the flaps ( 10 ) from closing correctly.
  • the part ( 31 ) reproduces the portion ( 42 ) that exits from the flaps ( 10 ), and is covered in turn.
  • the part ( 38 ) that is mounted on the seats ( 37 ) of the flaps ( 10 ) will contain the part ( 31 ) in its entirety ( FIGS. 2 and 5 ).
  • the final portion ( 38 ) of the barrel comprises a receptacle including a first cylindrical portion for receiving the covering portion of the mobile part ( 31 ) and a second cylindrical portion of a smaller diameter for receiving the covered portion of the mobile part ( 31 ).
  • the first cylindrical portion and the second cylindrical portion of the final portion ( 38 ) are separated by a shoulder.
  • the first cylindrical portion of the final portion ( 38 ) is longer than the covering cylindrical portion of the mobile part ( 31 ) so as to allow the axial movement of the mobile part ( 31 ).
  • the second cylindrical portion of the final portion ( 38 ) can be the same length as the covered cylindrical portion of the mobile part ( 31 ).
  • the final portion ( 38 ) of the barrel can be very short.
  • the covering portion of the mobile part ( 31 ) has an inner diameter corresponding to the outer diameter of the portion of the barrel ( 42 ) that passes through the seat ( 37 ), and has an outer diameter corresponding to the inner diameter of the first cylindrical portion of the final portion ( 38 ).
  • the covered portion of the mobile part ( 31 ) has an inner diameter corresponding to the inner diameter of the portion of the barrel ( 42 ) that passes through the seat ( 37 ), and has an outer diameter corresponding to the inner diameter of the second cylindrical portion of the final portion ( 38 ).
  • the assembly can be performed in particular such that the device ( 31 , 37 , 38 ) is incorporated in the weapon at the time of its manufacture.
  • the seat ( 37 ) of the flaps ( 10 ) is fixed to the portion 38 of the weapon, i.e. the extension of the barrel.
  • the straight portion of the mobile part ( 31 ) is inserted between the seat ( 37 ) and the part 38 .
  • the connection arm ( 34 ) and the part ( 35 ) are added to the part 31 after assembly.
  • the part ( 38 ) of the device as shown in FIG. 1 forms the end portion ( 38 ) of the barrel and includes a portion intended for assembly on the seat ( 37 ) of the flaps ( 10 ) and for receiving the mobile part ( 31 ).
  • the specific dimensions recommended for the device incorporated in the weapon can be as follows:
  • the calibre of the barrel is the same over its entire length, whereas for the majority of shotguns the barrel ends with a narrowing referred to as a choke, of varying dimensions depending on the desired performance.
  • This dispersion can be influenced by the use of what is known as a choke.
  • various types of chokes or throttles can be mounted on the barrels of a rifle in order to reduce the exit diameter thereof so as to increase the range of the shot and limit the spray of the projected leads.
  • FIGS. 8 and 9 For BB guns, a configuration as in FIGS. 8 and 9 is used.
  • FIG. 10 For shotguns, however, the configuration of FIG. 10 is used.
  • This version provides mobile parts ( 31 ) that are interchangeable with appropriate chokes.
  • the alternative for shotguns is to use a mini-part ( 38 ) at the outer end of which a choke of the aforementioned type can be screwed on ( FIG. 10 ), thus forming a throttling or narrowing to be mounted on the barrel in order to reduce the exit diameter, so as to increase the range of the shot and limit the spray of the projected shot material.
  • FIGS. 8, 12 and 9 show a mobile part ( 31 ) mounted at the final portion of the barrel. This is the same configuration for bullets and for chokes. Whereas for BB guns the portion ( 31 ) is cylindrical and rather short, for shotguns the portion ( 31 ) has the forms, the configurations and the length of a traditional choke ( FIG. 10 ).
  • the mobile part ( 31 ) is at the end of the barrel.
  • This mobile part ( 31 ) is mounted on the portion of the barrel ( 42 ) exiting from the seats ( 37 ) of the flaps ( 10 ).
  • This mobile part ( 31 ) is cylindrical and comprises an inner bore capable of allowing the passage of a bullet.
  • the interior of the barrel in which the projectile moves is deconstructed into two portions ( 42 , 31 ) which must be perfectly aligned.
  • the cylindrical mobile part ( 31 ) includes a covering portion and a final portion separated by a shoulder.
  • the mobile part ( 31 ) covers the barrel ( 42 ), and in its final cylindrical portion it forms the mouth of the barrel.
  • the part ( 31 ) reproduces the portion ( 42 ) that exits from the flaps ( 10 ).
  • the part ( 31 ) is mounted on the portion ( 42 ) that exits from the flaps ( 10 ) ( FIG. 9 ).
  • the covering portion of the mobile part ( 31 ) comprises a receptacle including a cylindrical portion capable of receiving the cylindrical portion of the final portion ( 42 ) of the barrel and of enabling the axial movement of the mobile part ( 31 ).
  • the cylindrical portion of the final portion ( 42 ) can be the same length as the covering cylindrical portion of the mobile part ( 31 ).
  • the final portion ( 38 ) of the barrel can be very short.
  • the covering portion of the mobile part ( 31 ) has an inner diameter corresponding to the outer diameter of the portion of the barrel ( 42 ) that passes through the seat ( 37 ).
  • the specific dimensions recommended for the device added to the existing weapon can be as follows:
  • the mobile part ( 31 ) is at the end of the barrel and forms a choke used in particular for shotguns, the choke forming a passage for the lead, which extends into the extension of the barrel and the inner diameter of which reduces in the direction of the mouth of the barrel.
  • the cylindrical mobile part ( 31 ) includes a covering portion and a final portion separated by a shoulder.
  • the mobile part ( 31 ) covers the barrel ( 42 ), and in its final portion forming the mouth of the barrel it includes a conical portion having a maximum diameter that is equal to the inner diameter of the barrel and narrows towards the outlet zone.
  • FIG. 11 it is possible to increase the resistance of the part ( 31 ) to axial movement by means of return springs ( 40 ) placed between an element ( 41 ) of the part ( 31 ) and a rod ( 39 ) fixed to the seat ( 37 ) of the flaps ( 10 ) so as to allow the part ( 31 ) to resist axial movement and resume its initial position.
  • the version of FIG. 11 is similar to FIGS. 8, 12 and 9 and shows a reinforced version of the portion ( 31 ) in a final position.
  • the bullet length of shotguns corresponds approximately to the length of the wad. This is dependent on the ammunition employed and the length of the rifle chamber. The length of the latter is 68 mm (virtually obsolete), 70 mm, 76 mm and 82 mm.
  • the length of a skirted wad for a 70 mm ammunition is approximately 40 mm.
  • the part 6 provides an adjustment mechanism for adaptation.
  • an expansion space having a timer ( 22 - 27 ) is associated with the exhaust pipes ( 21 ) for processing the recovered gases and inhibiting the sound wave. Further solutions are possible.
  • the expansion space ( 27 ) is coupled to the exhaust pipes ( 21 ) and comprises an internal bar ( 23 ) moved by the pressure of the gases in order to redirect these gases.
  • the expansion space 27 receives the gases carried by the recovery pipes ( 21 ), which gases enter the expansion space 27 via the opening ( 22 ) made in the bar ( 23 ) once said bar has been pushed to its end position and has thus sealed the openings ( 24 ).
  • a pressure relief valve ( 25 ) is provided (but could be replaced by small holes). As the pressure reduces, the bar resumes its starting position owing to the return spring ( 26 ) and the gases are discharged via the vents ( 24 ).
  • the final aim of the device provided by the invention described here is that of inhibiting the sound wave produced by the firing of the ammunition (rifle shot).
  • This stopper intended to inhibit the sound wave produced by the firing of the ammunition (rifle shot) prevents the combustion gases and sound waves from exiting via the mouth of the barrel by diverting them towards a suitable processing zone, whilst leaving the properties of the ammunition itself (speed, accuracy, etc.) unaffected.
  • a sound wave has a short life
  • the sound waves follow the projectile; although the speed of sound in a gaseous medium is variable (it can reach very high values depending in particular on the temperature of the gases), the sound wave does not stick to the projectile within the barrel; if the speed of the wave is greater than that of the projectile, the wave moves back and forth within the barrel.
  • the speed of the projectile may vary between 250 and 950 m/s depending on the calibre and type of ammunition.
  • each flap intended to seal a transverse half of the barrel by superposition.
  • the two flaps are actuated by an amplitude lever.
  • the lever(s) of each flap is/are implemented by a control moved by the passage of the projectile, which pushes a mobile portion of the barrel forwards.
  • the mechanism is preferably formed of:
  • a mechanical or hydraulic closure valve having one flap (solid or hinged) or preferably having two juxtaposed flaps (two halves overlapping one another, improved solution because it is quicker), having a diaphragm (of the camera shutter type), having a blade; return spring;
  • the disc valve possibly an autonomous device for resetting; the disc valve (one flap or dual flaps) closes the barrel just after the projectile has passed through, after which said projectile will have travelled between 0.5 and 1 mm after the flaps, this distance being freely selected by the amplitude coefficient applied to the levers.
  • control device (kinetic motivity by way of the thrust of the projectile) with spring return;
  • the total amplitude factor established by the levers will be defined depending on the calibre; the residual noise is that created by the projectile flying through the air.
  • the motivity of the device is assured solely by the passage of the bullet in the part ( 31 ) that is mobile (displacement in the order of max. one millimetre).
  • the cross section of the barrel is very slightly smaller than the calibre of the bullet, so as to assure a lateral tightness to best utilise the pressure of the gases.
  • the device is incorporated in the barrel during its manufacture (in which case the device is located well upstream from the mouth of the barrel, and therefore a barrel end is added after the part ( 31 ) or the part 38 )—as shown by the drawings ( FIG. 2 )—or the device is attached to the end of the barrel on the mouth side ( FIG. 8 ), extending the existing weapon or replacing a portion of the existing weapon, after having shortened it consequently.
  • This addition can be made by a number of methods: soldering, screwing, bayonet connection, etc.).
  • the proportion of the amplitude arms is directly dependent on the calibre of the weapon: 1 to 4 for 8 mm (bullet), 1 to 10 for a .12 calibre (shot material) and is thus fixed.
  • the closing mechanism consists of lever arms ( 8 ) actuated by a part ( 6 ), the shape of which can be variable.
  • the projectile penetrates a mobile portion of the barrel ( 31 ), pushing it forward. Because the rod of this portion ( 31 ) is connected to the ring ( 6 ), it pulls the ring forward, with the result of actuating the lever arms ( 8 ) on the pivots ( 7 ), which close the flaps ( 10 ), the gases thus being diverted to the exhaust ( 11 ) and then processed in the expansion space ( 27 ).
  • Exhaust openings should be made after a distance of 60 centimetres, to which the expansion space will be applied tightly, said openings being of a size suitable to contain the combustion gases; this expansion space ( 27 ) could have any shape and could be made of any material (solid or resilient); it could be applied at any point of the weapon (for example laterally on the barrel or beneath);
  • a flap support ( 10 ) incorporated in the barrel during its manufacture or as a modification thereto; the flap device is actuated by a linkage.
  • the movement of the device as a whole is controlled by the thrust exerted by the projectile on the mobile portion of the barrel ( 31 ).
  • the amplitude coefficient is calculated depending on the calibre in such a way that the flaps close immediately after the passage of the projectile, allowing it to advance by less than a millimetre.
  • the recovery or exhaust pipes can be reduced to just one and are not necessarily tubular, the expansion space can be of a different shape, and the control mechanism 6 shown by a full circular ring could be in the form of a circular arc, etc.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Silencers (AREA)
  • Toys (AREA)
  • Pipe Accessories (AREA)
US16/329,319 2016-08-29 2017-07-14 Silencer device for firearm Abandoned US20190249943A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
LU93184A LU93184B1 (fr) 2016-08-29 2016-08-29 Dispositif neutralisateur de son pour arme à feu
LU93184 2016-08-29
PCT/EP2017/067876 WO2018041462A1 (fr) 2016-08-29 2017-07-14 Dispositif neutralisateur de son pour arme à feu

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US20190249943A1 true US20190249943A1 (en) 2019-08-15

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US16/329,319 Abandoned US20190249943A1 (en) 2016-08-29 2017-07-14 Silencer device for firearm

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US (1) US20190249943A1 (de)
EP (1) EP3504501B1 (de)
JP (1) JP2019526779A (de)
CN (1) CN109844443A (de)
BR (1) BR112019004131A2 (de)
CA (1) CA3034443A1 (de)
CY (1) CY1123553T1 (de)
DK (1) DK3504501T3 (de)
EA (1) EA036578B1 (de)
ES (1) ES2828312T3 (de)
HR (1) HRP20201908T1 (de)
HU (1) HUE051791T2 (de)
LT (1) LT3504501T (de)
LU (1) LU93184B1 (de)
MX (1) MX2019002389A (de)
PL (1) PL3504501T3 (de)
PT (1) PT3504501T (de)
RS (1) RS61121B1 (de)
SI (1) SI3504501T1 (de)
SM (1) SMT202000635T1 (de)
WO (1) WO2018041462A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20230100384A1 (en) * 2021-09-27 2023-03-30 Jacob KUNSKY Firearm Suppressor with Remote Chamber
US20230272992A1 (en) * 2022-02-25 2023-08-31 Delta P Design, Inc. Firearm muzzle brake with gas-actuated valve

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117516261B (zh) * 2023-12-18 2025-12-02 山东第二机械有限公司 枪口减振降噪增压装置

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DE129989C (de) *
US1331474A (en) * 1919-07-11 1920-02-17 Shaverksha D Master Gun
BE347810A (de) * 1927-04-27
FR634990A (fr) * 1927-05-05 1928-03-03 Appareil destiné à atténuer le bruit et le recul des canons, mitrailleuses et carabines
BE345878A (de) * 1927-09-01 1900-01-01
DE2238834A1 (de) * 1972-08-07 1974-02-14 Ernst Kitzmann Schalldaempfer fuer waffen verschiedener art
FR2719937B1 (fr) 1994-05-16 1996-08-02 Bernard Louvat Dispositif modérateur de son.
WO2011035111A1 (en) 2009-09-18 2011-03-24 Silencerco, Llc Firearm sound suppressor
CN102735099A (zh) * 2012-06-14 2012-10-17 浙江新华体育器材制造有限公司 一种带有消音器的射击枪械
EP2867607B1 (de) 2012-06-28 2016-08-10 Steindl, Andreas Schalldämpfer für eine handfeuerwaffe
CN203518810U (zh) * 2013-11-07 2014-04-02 梁启明 狙击步枪消声器
CN105157473B (zh) * 2015-08-18 2017-03-22 西南大学 一种可改变出膛力度的防暴枪

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20230100384A1 (en) * 2021-09-27 2023-03-30 Jacob KUNSKY Firearm Suppressor with Remote Chamber
US11927410B2 (en) * 2021-09-27 2024-03-12 Jacob KUNSKY Firearm suppressor with remote chamber
US20230272992A1 (en) * 2022-02-25 2023-08-31 Delta P Design, Inc. Firearm muzzle brake with gas-actuated valve
US11976896B2 (en) * 2022-02-25 2024-05-07 True Velocity Ip Holdings, Llc Firearm muzzle brake with gas-actuated valve

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Publication number Publication date
EP3504501B1 (de) 2020-09-02
CN109844443A (zh) 2019-06-04
SI3504501T1 (sl) 2020-12-31
SMT202000635T1 (it) 2021-01-05
HRP20201908T1 (hr) 2021-01-22
PT3504501T (pt) 2020-11-17
PL3504501T3 (pl) 2021-03-22
EA201900131A1 (ru) 2019-11-29
CY1123553T1 (el) 2022-03-24
LU93184B1 (fr) 2018-03-28
CA3034443A1 (fr) 2018-03-08
BR112019004131A2 (pt) 2019-05-28
WO2018041462A1 (fr) 2018-03-08
EA036578B1 (ru) 2020-11-25
ES2828312T3 (es) 2021-05-26
DK3504501T3 (da) 2020-11-30
EP3504501A1 (de) 2019-07-03
MX2019002389A (es) 2019-09-06
RS61121B1 (sr) 2020-12-31
HUE051791T2 (hu) 2021-03-29
LT3504501T (lt) 2020-11-10
JP2019526779A (ja) 2019-09-19

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