EP4379306A1 - Gesicherter ladehebel - Google Patents

Gesicherter ladehebel Download PDF

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Publication number
EP4379306A1
EP4379306A1 EP22210103.2A EP22210103A EP4379306A1 EP 4379306 A1 EP4379306 A1 EP 4379306A1 EP 22210103 A EP22210103 A EP 22210103A EP 4379306 A1 EP4379306 A1 EP 4379306A1
Authority
EP
European Patent Office
Prior art keywords
lever
safety
breech
barrel
lock
Prior art date
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.)
Pending
Application number
EP22210103.2A
Other languages
English (en)
French (fr)
Inventor
Pascal Franssen
Sylvie LOOSVELDT
David BERENGUIER
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.)
FN Herstal SA
Original Assignee
FN Herstal SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by FN Herstal SA filed Critical FN Herstal SA
Priority to EP22210103.2A priority Critical patent/EP4379306A1/de
Priority to PCT/EP2023/083115 priority patent/WO2024115358A1/fr
Publication of EP4379306A1 publication Critical patent/EP4379306A1/de
Pending legal-status Critical Current

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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 (self-ignition). This means that before the start of a shot, waiting to fire, the moving parts (generally including a slide, a bolt and a firing pin, the assembly sometimes being called a breech) are in the rear position in the weapon and that the cartridge is waiting to be fired on a feed lane. The cartridge is therefore not chambered while awaiting firing.
  • the moving parts generally including a slide, a bolt and a firing pin, the assembly sometimes being called a breech
  • the fire control produces the release of 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 backward recoil of the moving parts, either by manual rearmament of the shooter, or automatically by recovering the energy provided by the ammunition.
  • the percussion energy can therefore be stored in a recovery spring or in another spring (example: in a dog spring in the case of percussion by dog).
  • immediate action this involves taking the cocking lever and retracting the moving parts until they are hooked on the trigger, waiting for an action on the trigger to restart the shot.
  • the present invention relates to a firearm operating with an open breech comprising a breech slidably guided in a carcass between a front position against a barrel, a barrel extension or the carcass and a rear position for reloading and waiting to fire, a cocking lever also guided in a sliding manner in the carcass on which the breech rests, a striker placed in the breech, or integral with it and a lever safety arranged on the cocking lever or on the breech being able to occupy a safety position in which a lever safety spacer is interposed between the breech and the barrel, the barrel extension or the receiver so as to prevent contact between the striker and an ammunition chambered in the barrel, or a firing position where the spacer does not come between the breech and the barrel.
  • moving parts means all the parts set in motion by the reloading cycle of the weapon (depending on the type of weapon, breech, slide, bolt, etc.).
  • Modern light machine guns are, at present, often made of a lightweight material (aluminum rather than traditional machine gun steel), with the exception of the barrel. It is therefore important to avoid passing significant forces through the receiver and the cocking lever when preventing firing in the event of incomplete rearming, and therefore to prevent the breakage of these parts (or to prevent the failure to oversize them and therefore increase their mass).
  • 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 thickness between the parts mobile 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.
  • a part 7 which we will hereafter call lever safety
  • the spacer can be interposed between the cylinder head and a projection provided for this purpose on the carcass.
  • 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 will be no explosion of the system (the pressure is contained by the locked weapon).
  • FIG. 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.
  • FIG 2 shows a situation similar to figure 1 , but, resulting from a 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.
  • FIG. 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 of the figure 2 and the shooting is prevented.
  • FIG 4 shows the moving parts in the intermediate reloading position.
  • the lever safety 7 is pushed towards its lower position by a deflector 20 placed on the carcass.
  • 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 reset lever 8 includes means reducing the risk of uncontrolled movement thereof which could unintentionally release the lever safety 7. It may for example be simple male/female reliefs perpendicular to the movement of which we comes out "in force", or more complex mechanisms such as for example a handle base comprising a lug or a hole cooperating with a hole or a corresponding lug in the carcass, the handle being disengaged from this hole or this lug by a lateral movement of the handle before the actual reset movement.
  • the weapon according to the invention comprises a leaf 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°).

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Toys (AREA)
  • Mechanical Control Devices (AREA)
EP22210103.2A 2022-11-29 2022-11-29 Gesicherter ladehebel Pending EP4379306A1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP22210103.2A EP4379306A1 (de) 2022-11-29 2022-11-29 Gesicherter ladehebel
PCT/EP2023/083115 WO2024115358A1 (fr) 2022-11-29 2023-11-27 Manette d'armement sécurisée

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP22210103.2A EP4379306A1 (de) 2022-11-29 2022-11-29 Gesicherter ladehebel

Publications (1)

Publication Number Publication Date
EP4379306A1 true EP4379306A1 (de) 2024-06-05

Family

ID=84366986

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22210103.2A Pending EP4379306A1 (de) 2022-11-29 2022-11-29 Gesicherter ladehebel

Country Status (2)

Country Link
EP (1) EP4379306A1 (de)
WO (1) WO2024115358A1 (de)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0378976A1 (de) * 1989-01-11 1990-07-25 FABBRICA D'ARMI P.BERETTA S.p.A. Automatische Sicherheitsvorrichtung für Feuerwaffen
US20030192222A1 (en) 2001-05-09 2003-10-16 Ernst Wossner Methods and apparatus to secure a safety catch in a jammed position

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0378976A1 (de) * 1989-01-11 1990-07-25 FABBRICA D'ARMI P.BERETTA S.p.A. Automatische Sicherheitsvorrichtung für Feuerwaffen
US20030192222A1 (en) 2001-05-09 2003-10-16 Ernst Wossner Methods and apparatus to secure a safety catch in a jammed position

Also Published As

Publication number Publication date
WO2024115358A1 (fr) 2024-06-06

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