Classifications

• • 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
  • F41A1/00—Missile propulsion characterised by the use of explosive or combustible propellant charges
  • F41A1/08—Recoilless guns, i.e. guns having propulsion means producing no recoil

Definitions

• the invention belongs to the field of devices for assisting in shooting a firearm.
• the invention belongs to the field of devices for assisting the shooting of a firearm, by absorbing the recoil of the weapon.
• the invention belongs to the field of devices for assisting the shooting of a firearm, by actively absorbing the recoil of the weapon.
• Firing a projectile with a firearm generates a momentum that usually applies to the breech in the direction opposite to the movement of the projectile.
• the recoil force may be more or less important depending on the time spread during which the support will dissipate the energy associated with the recoil.
• Recoilless barrels are for example known today, these barrels have tubes which guide a projectile which is self-propelled. Starting from a use for standard ammunition, they gradually found their utility against anti-tank weapons. The first were used during the First World War (eg Davis gun). The combustion gases are used to push the shell into the barrel by taking pressure on the air behind the barrel. The loss of energy towards the rear is considerable and limits the use of this system because the speed of the shell is slow and the ammunition must be made to measure. Guide tubes became progressively interesting with the appearance of self-propelled ammunition, and particularly those with shaped charges, thanks to their efficiency independent of the speed of the ammunition. Today we find these guide tubes under names like rocket launcher, RPG, avaoka etc.
• the present invention proposes a radical solution to this problem: Total inhibition in the axis of the barrel of the recoil transmitted to the support by means of a device attached to the rear of a weapon.
• the invention relates to a device for inhibiting recoil of firearms, and to be effective, the device must be perfectly aligned with the axis of the projectile / breech.
• the invention relates to a device for inhibiting in the axis of the barrel of recoil intended to be used with a firearm, said device carrying out a discharge of pressurized fluid in a direction opposite to the firing of the barrel for absorb the recoil of the weapon, characterized in that said device is fixed to the rear of said weapon and comprises:
• the ultimate goal being that the fluid expelled at a certain velocity through the discharge zone equalizes in momentum that of the projectile and the burnt gases.
• the shape of the discharge zone, the pressure and volume of the fluid in the reservoir can be optimized for each type of firearm from small caliber to artillery barrel.
• the device of the invention can also include all or one of the following characteristics in any operable technical combination:
• the discharge zone comprises said neck, an expansion zone, and an outlet section having the shape of a Laval nozzle.
• the discharge zone has a converging and then diverging shaped flow profile, and in which the length and the end diameter of the diverging part allow the pressures between the expelled fluid and the external environment to be equalized.
• the pressurized fluid may very well be in its liquid or gaseous, hot or cold state, or resulting from combustion.
• the support and the weapon can be attached to one or more intermediate parts or mechanisms.
• the primary mechanism is configured to allow the discharge of a quantity of pressurized fluid generating a momentum at an outlet section of the discharge piece equal to the momentum generated by the shot and the gas of combustion of said weapon.
• the discharge zone is sized to generate said desired amount of movement when the fluid passes through its outlet section.
• the pressurized fluid is chosen from a pressurized gas or a mixture of pressurized gas, air, C02, water or any other liquid.
• the primary mechanism allowing the discharge of the pressurized fluid in the room with the discharge zone uses a mechanism chosen from an electrical, mechanical, electromechanical or hydraulic mechanism to actuate and / or control the discharge of fluid.
• a mechanism chosen from an electrical, mechanical, electromechanical or hydraulic mechanism to actuate and / or control the discharge of fluid.
• a jack or an electromechanical force transmitting the discharge command to a valve of the primary mechanism following the detection of a rise in combustion pressure of gas from the weapon or the movement of the breech relative to the frame.
• the device is configured to fill the tank from an external source of fluid and following each firing of the weapon, or continuously to maintain a predefined fluid level and / or fluid pressure.
• the secondary mechanism for filling the tank uses a mechanism chosen from among an electrical, mechanical, electromechanical or hydraulic mechanism to actuate the filling of the tank.
• the device uses the movement of the cylinder head relative to the frame to actuate a valve of said secondary mechanism allowing the tank to be filled.
• the primary mechanism comprises means for regulating the pressurized fluid discharge time, such as a return spring or a timer.
• the system transmitting the discharge order (14) of the device of the invention comprises:
• a pipe comprising an incompressible fluid and able to connect with a gas borrow pipe of the weapon when the device is fixed with said weapon, said pipe opening onto the primary mechanism ensuring the sealing and the discharge of the tank ,
• the primary mechanism comprises a needle comprising a head regulating the flow of fluid discharge by sealing / unblocking the neck of the discharge zone, and the rise in pressure in the pipe causes the needle to move when the rise in pressure is greater. to the internal pressure of the vessel, thus allowing the discharge of the pressurized fluid contained in said vessel.
• the system transmitting the discharge order is based on the recoil of the breech from the support or is based on the detection of gas or combustion gas pressure of the weapon to transmit the order.
• discharge to the primary system to discharge the fluid said discharge command being transmitted by means of a mechanism selected from an electrical, mechanical, electromechanical or hydraulic mechanism.
• the device uses the movement of the cylinder head relative to the frame to actuate the valve of the primary mechanism by means of an electromechanical mechanism thus allowing the discharge of fluid.
• FIG. 1 shows the device according to the invention (10) mounted at the rear of a barrel (80) according to one embodiment.
• the partial section of the isometric view makes it possible to understand the interactions, as well as the resulting material jet.
• FIG. 2 shows the device according to the invention, according to one embodiment.
• FIG. 3 shows the device (10) at the rear of a firearm (80) in one embodiment of the assembly 90.
• FIG. 4 shows an exploded view of Figure 2 of the device according to the invention in one embodiment.
• FIG. 5 shows in section Figure 3 with the device at the rear of a firearm, as well as their interactions in one embodiment.
• FIG. 6 is a detailed sectional view of Figure 2 showing the device according to the invention in one embodiment.
• the present invention provides a weapon recoil inhibitor for attachment to the rear of a weapon.
• the device is very advantageous in that it can be adapted for use with different types of weapons available on the market. Depending on a chosen weapon, said device is adapted to perform a discharge of fluid generating a momentum opposing the momentum generated by the projectile and the gas burnt when fired from said weapon.
• the present invention relates to a device (Fig. 1) for inhibiting in the axis of the recoil barrel intended to be implemented with a firearm, said device performing a discharge of fluid under pressure in one direction. opposite to the axis of the barrel to absorb the recoil of the weapon.
• the device of the invention is particular in that it is an independent part of the weapon which is attached to the rear of the latter and comprises specific elements and exclusive for the operation of said device.
• the device (10) of the invention comprises:
• the device illustrated in FIGS. 1 - 6 corresponds to an embodiment in which the system transmitting the discharge order comprises a pipe comprising an incompressible fluid capable of connecting with a gas borrow pipe of the weapon when the device is fixed with said weapon. Said pipe opens onto the primary mechanism ensuring the sealing and discharge of the tank (13) and transmits the discharge order by means of a pressure increase in said pipe, as will be detailed below.
• This embodiment is given by way of example and the device of the invention can use other mechanisms to transmit the discharge order to the primary mechanism (15) without departing from the scope of the invention.
• the device (10) according to the invention comprises:
• -a secondary mechanism (12) such as a valve or valve mechanism
• -a primary mechanism such as a valve or valve mechanism
• the assembly (90) is composed of the device (10) according to the invention in one embodiment attached to the rear of any firearm (80).
• the gas borrow pipe (14) comprises: -the fluid (14a) propagating the pressure wave coming from the piston (85) towards the device (10);
• the primary mechanism (15) ensuring the sealing and the discharge comprises:
• the needle (15d) mainly comprises 2 specific zones located at its ends:
• the part with the discharge zone (16) mainly comprises: -a machined support (16a) allowing the assembly of the various elements of the device;
• the reservoir (13), contains a pressurized fluid which may in this embodiment be air.
• This reservoir is supplied by an external system via a secondary filling mechanism ⁇ 2).
• the filling can be done permanently or synchronized with the mechanism of the firearm.
• the burning chemical in the casing (84) generates hot gases which push the projectile (82) forward.
• the piston (85) is moved by pressure transmitting the pressure wave generated by the burning gases to the gas borrow pipe (14).
• the fluid (14a) of this pipe will, via the pipe (16f) and (15c) accumulate in the space (14c), between the support (15a) and the tail of the needle (15g) (fig. 7) .
• This rise in pressure greater than the internal pressure of the tank will move the needle (15d).
• the movement of the latter will break the seal between the needle head (15f) and the back of the neck (16b) (fig. 8), which will release the pressurized fluid in the expansion zone (16c) .
• the neck (16b) and the expansion zone (16c) take the form of a Laval nozzle.
• This neck (16b) imposes a sonic limit on the outgoing fluid and consequently the mass flow rate of the device (10).
• the divergent-shaped expansion zone (16c) allows the expansion of this fluid by decrease in pressure and increase in speed.
• the end diameter of this zone (16d) is said to be “adapted” to allow maximum use of the energy contained in the pressurized fluid while ensuring an outlet pressure of the fluid equivalent to the pressure of the external environment.
• the nozzle has a physical phenomenon specific to it or the speed of the fluid in its throat cannot have a speed greater than the speed of sound in the throat.
• the flow can be subsonic, sonic, but not supersonic.
• the diverging part of the nozzle is itself generally supersonic.
• the pressure and temperature of the tank define the density of the fluid in the neck.
• the section of the throat, the temperature and the pressure in the tank determine the mass flow obtained through the throat.
• the fluid in this neck is not fully relaxed and will gradually do so in the diverging portion until its pressure equals the external pressure (suitable nozzle).
• the pressure in the diverging portion of the nozzle decreases, but the volume increases and continues to accelerate to reach its outlet speed which is a function only of the final section of the diverging portion.
• This device is particularly intended for the military field where the forces and impulses generated during firing are limiting factors in the designs and uses which are current or future.
• the use of the device allows, for example, self-supporting artillery systems using wheeled vehicles to be able to fire in any direction without taking support from the

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• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• General Engineering & Computer Science (AREA)
• Toys (AREA)
• Filling Or Discharging Of Gas Storage Vessels (AREA)
• Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=67999721

Family Applications (1)

Country Status (4)

Families Citing this family (2)

Family Cites Families (16)

• 2019
  • 2019-03-04 FR FR1902159A patent/FR3093559B1/fr active Active
• 2020
  • 2020-03-02 EP EP20725805.4A patent/EP3935337A2/de active Pending
  • 2020-03-02 WO PCT/FR2020/050413 patent/WO2020178515A2/fr unknown
  • 2020-03-02 US US17/435,968 patent/US11624567B2/en active Active

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