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
  • F41A17/00—Safety arrangements, e.g. safeties
  • F41A17/42—Safeties for locking the breech-block or bolt in a safety position
• • 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
  • F41A3/00—Breech mechanisms, e.g. locks
  • F41A3/64—Mounting of breech-blocks; Accessories for breech-blocks or breech-block mountings
  • F41A3/72—Operating handles or levers; Mounting thereof in breech-blocks or bolts

Definitions

• the present invention relates to securing a firearm operating with an open breech by means of a cocking lever.
• a machine gun operates with an open breech, to avoid the risk of cook-off
• the fire control produces the release of the moving parts from the rear position.
• the energy to move the moving parts is stored in a spring, called a regenerative spring. Once these moving parts have been released, after their complete forward movement, the start of the shot is ensured by the percussion of the primer by means of a striker attached or not to the moving parts.
• the percussion energy is obtained during the rearward recoil of the moving parts, either by manual rearming of the shooter, or automatically by recovering the energy supplied by the ammunition.
• the percussion energy can therefore be stored in a recuperative spring or in another spring (example: in a dog spring in the case of percussion by dog).
• Figure 1 shows a partial section of the different parts of an example of a weapon according to the invention, the moving parts in the forward position, after complete reloading: the lock is completely closed, the base of the cartridge at the bottom of the bolt bowl, the striker ready to fire.
• Figure 3 shows a partial section of the different parts of the example of Figure 1, the moving parts in the intermediate reloading position: the lever safety has been released from under the barrel extension.
• Figure 4 shows a partial section of the different parts of the example of Figure 1, the moving parts in the intermediate reloading position: the lever safety is pushed towards its low position by a deflector on the carcass.
• Figure 5 shows a partial section of the different parts of the example of Figure 1, the moving parts in the rearward reloading position, after hooking the moving parts in the firing waiting position: the safety of joystick is in the low position thanks to the action of the deflector and is retained in this position by the tilting of the joystick lock.
• Figure 6 shows a partial section of the different parts of the example of Figure 1, the moving parts in the return movement towards the front.
• the joystick safety is held in the down position by the joystick lock, held in this position by a spring.
• Figure 7 shows a section of an example of a device for retaining the lever in the front position by means of a leaf spring.
• Figure 8 shows an overview of an example of a firearm according to the invention. fii
• the moving parts In order to prevent firing, the moving parts, according to the invention, cannot go completely forward by means of a part 7 (which we will hereafter call lever safety) which adds a thickness between the moving parts and the usual forward stop of the weapon, the barrel or the barrel extension 1 in which the bolt 11 locks in the case of a bolt breech. In this case, there is therefore no force applied directly to the carcass and the part which absorbs the forward shock is the one which is dimensioned for this during the intentional firing with the weapon.
• lever safety which adds a thickness between the moving parts and the usual forward stop of the weapon, the barrel or the barrel extension 1 in which the bolt 11 locks in the case of a bolt breech.
• This lever lock 7 has a thickness just sufficient to prevent the protrusion of the striker 10, and it is therefore not possible for the primer 2 to be struck.
• the moving parts 9, 10, 11 are dimensioned (in particular the lock 11 and the locking light controlling the lock in the slide 9) so that when the moving parts (cylinder head) abut on the lever lock 7, the bolt is sufficiently forward so that the weapon is locked, the shooter is therefore also safe in the event of self-ignition of the cartridge in the chamber: even if there is a shot due to self-ignition, there is no there will be no explosion of the system (the pressure is contained by the locked weapon).
• An objective of the invention is therefore to prevent the start of an involuntary shot by percussion: if an unfired cartridge is in the chamber; and in the event of action on the cocking lever followed by incomplete recoil of the moving parts.
• Figure 1 shows the situation of the different pieces put into play in a normal situation just before the start of the shot.
• the bolt 11 locked to the barrel extension and joined to the base of the barrel.
• the butt of the stationary ammunition rests on a bowl of the bolt and the striker 10 is in contact with the primer 2.
• the lever safety 7 is blocked under the barrel extension 1 and the lever bolt 6 is supported on a housing of the front stop 4 which allows the lever safety 7 to be released when the reset lever 8 is brought to the forward position. In this position, the shot fires normally.
• a normal cycle i.e.
• the bolt is returned to the rear by the automatic mechanism without the reset lever following this movement, the lever safety 7 therefore remains under the barrel extension, and the moving parts (or breech) are either hooked by the starting mechanism at the end of a burst or during single-shot firing, or move forward to fire the next shot in a burst.
• Figure 2 shows a situation similar to Figure 1, but resulting from partial manual reset.
• the lever safety has rotated by 90°, a spacer 12 interposing between the slide 9 and the barrel extension 1.
• the extra thickness of this spacer 12 then prevents the striker 10 from striking the primer 2.
• the spacer 12 does not bear directly on the slide 9, but bears on a lug of the lever body 8 which itself bears on the slide 9.
• This advantageous arrangement allows to define a travel limited to joystick safety.
• This pin also serves as a support for the reset lever 8 to bring the moving parts towards the rear; we hereinafter call it the control pin for the reset handle 8.
• Figure 3 shows the moving parts in an intermediate manual reloading position: the lever safety 7 has been released from under the barrel extension 1 and now rests on the control pin of the reset lever 8 In this position, if the reset lever 8 is released involuntarily, we will return to the situation in Figure 2 and firing is prevented.
• Figure 5 shows the moving parts in the rearward reloading position, after hooking the moving parts into the firing waiting position.
• the lever safety 7 is in the low position thanks to the action of the deflector 20 and is retained in this position by the tilting of the lever lock 6.
• the surface 15 at the rear end of the lever lock 6 then rests on the corresponding support surface 13 on the lever safety 7. From this position, the user can push the reset lever 8 forward without the lever safety 7 going up.
• the weapon according to the invention comprises a blade spring 21 comprising at least one lug 22 inserting into a corresponding groove 23 on the lever body 8 when the lever is in the forward position.
• This leaf spring 21 comprises a rear side (ie towards the rear of the weapon) having a small angle (less than 45°, preferably less than or equal to 30°) relative to the axis of movement of the lever. so as to present low resistance to the advance of the lever.
• This weak Resistance can also advantageously be obtained by a sliding surface 24 at the front of the lever body on which the lug 22 of the spring blade rests during the forward movement of the lever.
• the front flank of the lug 22 of the leaf spring 21 has a high angle relative to the axis of the moving parts (ie higher than the angle of the rear flank, preferably greater than or equal to 45°).

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Toys (AREA)
• Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
• Mechanical Control Devices (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=84366986

Family Applications (2)

Family Applications Before (1)

Country Status (6)

Family Cites Families (2)

• 2022
  • 2022-11-29 EP EP22210103.2A patent/EP4379306A1/de not_active Withdrawn
• 2023
  • 2023-11-27 IL IL320909A patent/IL320909A/en unknown
  • 2023-11-27 EP EP23813369.8A patent/EP4627281A1/de active Pending
  • 2023-11-27 WO PCT/EP2023/083115 patent/WO2024115358A1/fr not_active Ceased
  • 2023-11-27 JP JP2025530425A patent/JP2025538621A/ja active Pending
  • 2023-11-27 KR KR1020257017390A patent/KR20250124806A/ko active Pending
  • 2023-11-27 AU AU2023400205A patent/AU2023400205A1/en active Pending

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