WO2005031242A1 - Arme a feu a mecanisme de retardement d'ouverture de culasse - Google Patents

Arme a feu a mecanisme de retardement d'ouverture de culasse Download PDF

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Publication number
WO2005031242A1
WO2005031242A1 PCT/IB2004/003013 IB2004003013W WO2005031242A1 WO 2005031242 A1 WO2005031242 A1 WO 2005031242A1 IB 2004003013 W IB2004003013 W IB 2004003013W WO 2005031242 A1 WO2005031242 A1 WO 2005031242A1
Authority
WO
WIPO (PCT)
Prior art keywords
breechblock
self
roller
firearm
roller means
Prior art date
Application number
PCT/IB2004/003013
Other languages
English (en)
Inventor
Tabarruk Abdullaev
Viktar Prykhodzka
Original Assignee
Tabarruk Abdullaev
Viktar Prykhodzka
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 Tabarruk Abdullaev, Viktar Prykhodzka filed Critical Tabarruk Abdullaev
Publication of WO2005031242A1 publication Critical patent/WO2005031242A1/fr

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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
    • F41A3/00—Breech mechanisms, e.g. locks
    • F41A3/12—Bolt action, i.e. the main breech opening movement being parallel to the barrel axis
    • F41A3/36—Semi-rigid bolt locks, i.e. having locking elements movably mounted on the bolt or on the barrel or breech housing
    • F41A3/44—Semi-rigid bolt locks, i.e. having locking elements movably mounted on the bolt or on the barrel or breech housing having sliding locking elements, e.g. balls, rollers

Definitions

  • This invention relates to a self-loading firearm, particularly of the blowback operated type, having a mechanical recoil movement delaying mechanism which delays breech opening.
  • Self-loading firearms includes semi-automatic or automatic firearms.
  • the barrel is fixed to the frame of the firearm and the breechblock moves reciprocally from the forward battery position to the rearmost position on the frame of the firearm to extract the empty cartridge from the firing chamber that resulted from firing a round of ammunition.
  • the breechblock ejects the cartridge from the firearm and simultaneously cocks the hammer.
  • Another round of the cartridge is picked up from the magazine when the breechblock moves forwards towards the battery position to close the breech opening and loads the cartridge into the firing chamber.
  • the gas pressure resulting from the explosion is at its greatest during the initial explosion and exerts a force on the bullet to propel the bullet out of the barrel and also exerts a reactive force on the cartridge case and the breechblock, thus pushing the breechblock rearwards and extracting the empty cartridge case.
  • the extraction of the empty cartridge can occur during the high pressure, especially if the breechblock is light and some of the gas escapes through the open breech.
  • the gas pressure within the barrel is thus reduced and less force is available to propel the bullet out of the barrel, yielding low bullet velocity and hence poor penetration power when the bullet impacts the target.
  • the breechblock is too light, the breech may open too early and the cartridge case may rupture.
  • the firearm therefore has to be limited to low to medium powered ammunition. Further more, a moment is created about the wrist that tends to rotate the gun barrel upward after firing which can be undesirable especially for automatic firearm. Ammunitions are wasted in such firing and the user has to frequently change reload the firearm. Hence it is desirable to provide firearms with a delayed breech opening mechanism which causes the bullet to be propelled with higher velocity, allows the usage of higher powered ammunition, reduces the upward movement of the barrel after each firing and also reduces the firing cyclic rate.
  • One means of delaying the opening of the breech is to increase the mass of the breechblock.
  • the mass of breechblock and the recoil forms an inbuilt delaying mechanism whereby the inertial force has to be overcome first before the recoil of the breechblock can start to initiate.
  • the heavier breechblock can be used to increase the necessary the delay but there is a limit weight of the breechblock because it becomes impractical for the firearm to become too heavy. Plus, a heavy breechblock can impair accuracy.
  • the firearm is provided with a roller that is movably held in a pair of spaced apart opposed inclined grooves formed in the upper rear portion of the weapon's frame.
  • a cam surface provided on the hammer drives the roller is upwards until the roller is in contact with an inclined surface provided on the rear portion of the breechblock.
  • the inclined surface exerts a force on the roller and drives it downwardly along the cam surface of the hammer and the breechblock can only resume the recoil movement when the roller is moved out of the recoil path.
  • the roller for this patent is dependent on the hammer to wedge the roller against the breechblock. At this position, the roller is exposed to sand or dust that may be accumulated during utilization of the firearm or exposed to the residues that resulted from the explosion of the bullet. These particles do not only hamper the recoil movement of the breechblock, they also reduces the performance of the roller. Both the ends of the roller that are enclosed within the inclined groove may not simultaneously move upwards or downwards, hence, reducing the efficiency of the delay mechanism.
  • Another means of delaying the breech opening is adding a delaying mechanism to the breechblock.
  • One delaying mechanism utilised in the model G3 manufactured by Heckler and Koch consists of two rollers mounted on either side of the breechblock and a firing pin fit between the rollers. When the breechblock is closed, the rollers act on the camming surfaces of the firing pin, wedging the rollers in the receiver frame. When a bullet is fired, the breechblock is prevented from opening immediately. The firing pin must be forced rearwards first, allowing the rollers to disengage with the receiver frame before the breechblock can move rearwards. Here again, the rollers are exposed to dust particles and residues from the explosion.
  • the object of the invention is to provide a breech opening delaying means for a self-loading firearm operating on a blowback principle that is adjustable and simple to operate.
  • a further object of the invention is to provide a means of reducing the upward movement of the barrel after each firing.
  • the self-loading firearm operating on the blowback principle of the current invention is provided with a delay mechanism that is located at the top front portion of the barrel.
  • the delay mechanism comprises of a roller means biased reciprocally into and out of the movement path of the recoiling breechblock.
  • the breechblock is provided with an inclined surface to form a recess in which the roller means is received, said roller means biasing against the inclined surface.
  • the roller means is provided on the housing and is a spring is used to bias the roller means into the recess on the breechblock and against the inclined surface on the recess. The biasing of said roller means from said spring can be reversibly increased or decreased.
  • Figure 1 shows the side view of a self-reloading firearm showing the delaying mechanism of the breechblock.
  • Figure 2 shows the detailed structure of the breechblock.
  • Figure 3 shows the isometric view of the roller means and the recess on the breechblock.
  • a self-loading firearm comprises a housing (1) having a handgrip (5) adapted to be grasped by the user and in which the magazine (7) can be removably mounted, a barrel (17) , a cartridge chamber on the rear end of the barrel, a trigger (3) , a hammer (9) , a firing pin (13) , a trigger mechanism coupled to the trigger (3) and hammer (9) to cause the hammer (9) to strike the firing pin (13) thereby causing the firing pin (13) to engage with the primer of the bullet to discharge the firearm, recoil spring (11) , and a breechblock member (15) as is customary.
  • the breechblock member (15) is slidably mounted within the housing (1) for reciprocal movement along the frame between the battery position and the rearmost position. The alternating movement between the battery position and the rearmost position defines the movement path of the breechblock (15) .
  • the detail of the breechblock (15) for the particular firearm illustrated in Figure 1 is shown in Figure 2.
  • the upper surface of the breechblock (15) is provided with a recess (19) with an inclining surface (20) (see Figure 3) .
  • the recess receives a roller (21) that is provided on the breechblock cover (la) and is downwardly biased to be reciprocally movable into and out of the movement path of the breechblock (15) .
  • the roller (21) is said to be in the movement path of the breechblock (15) and provides a downwardly force which impedes and delays the rearward movement of the breechblock (15) .
  • the roller is also forwardly biased such that when it is received in the recess (19) , apart from exerting a force downwardly, the roller (21) will also exert a forward force against the inclined surface (20) of the recess (19) to increase the impediment to the rearward movement of the breechblock (15) .
  • One way of biasing the roller means into and out of the movement path of the breechblock is to use a coil spring.
  • the coil spring is placed through a perforation provided from the top of the breechblock cover (la) that extends downwardly from the top the breechblock (15) and inclined in the opposite direction of the inclined surface (20) .
  • the lower end of the inclined coil spring is provided with a means of attaching to the roller (21) .
  • a lever (23) is attached on its front end to the housing via a pivot pin (25) and the rear end of the lever (23) is provided with a roller (21) that is pivoted to the rear end with a pivot pin (22) .
  • the rear end is provided with two arms that extend rearwardly to receive the roller (21) in between the arms and a pivot pin (22) is used to secure the roller (21) to the arms.
  • the front end of the lever (23) is provided with an arm (27) that extends upwardly from the pivotal point (25) of the lever (23) and the breechblock cover (la) and is biased rearwards.
  • a coil spring (31) is mounted onto a pin (33) of a cap (29) .
  • the front end of the breechblock cover (la) is provided with a horizontal bore (37) into which the coil spring (31) is introduced.
  • the coil spring (31) is maintained within the bore (37) and is compressed by a threaded cap (35) .
  • the rear end of the coil spring (31) with the cap (29) biases against the front surface of the lever arm (27) to push the lever arm (27) rearwards and rotates roller (21) on the lever (23) clock-wise, biasing the roller (21) downwardly and forwardly.
  • the threaded cap (35) is reversibly adjustable by screwing in or out of the bore (37) to increase or decrease the biasing on the roller
  • the breechblock (15) does not move rearwards immediately.
  • the upward movement of the barrel is also reduced due to the force exerted by the spring (31) on the roller (21) .
  • the lever arm (27) is pushed against the spring (31) and the compressed spring (31) will urge the roller into the recess (19) when the breechblock (15) returns to battery position.
  • the delay mechanism is operable with the inclined angle ranging from 30° to 45°.
  • the operable ratio of the depth of the recess (19) to the radius of the roller (21) is 2:5 - 5:8.
  • the delay mechanism operates optimally when the angle of the inclined surface (20) is 40°.
  • the firearm illustrated in Figure 1 shows only one delay mechanism
  • the firearm is not limited to have only one such delay mechanism.
  • the firearm can be provided with two of such delay mechanisms, whereby both the breechblock arm (15a, 15b) are provided with a recess on each arm to receive a roller.
  • the delay mechanism described here and illustrated in Figure 1 allows the delay mechanism to be placed at the top portion of the firearm's muzzle which spreads the weight towards the front of the firearm to reduce the upward movement of the muzzle during recoil.
  • the delay mechanism is not limited to be provided only in that area. It will be understood that the above description does not limit the invention to the above-given details. It is contemplated that various modifications and substitutions can be made without departing from the spirit and scope of the following claims.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Toys (AREA)

Abstract

L'invention concerne une arme à feu à auto-rechargement fonctionnant selon le principe de pression des gaz vers l'arrière. Cette arme à feu permet d'obtenir des vitesses de balles accrues, de tirer des cartouches plus puissantes, et de réguler la cadence de tir grâce au ménagement d'un mécanisme de retardement qui augmente le temps de retard de l'ouverture de la culasse. Ce mécanisme de retardement est réglable, ce qui permet de régler la valeur du retard de l'ouverture de la culasse.
PCT/IB2004/003013 2003-09-24 2004-09-16 Arme a feu a mecanisme de retardement d'ouverture de culasse WO2005031242A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
MYPI20033644 2003-09-24
MYPI20033644 2003-09-24

Publications (1)

Publication Number Publication Date
WO2005031242A1 true WO2005031242A1 (fr) 2005-04-07

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2004/003013 WO2005031242A1 (fr) 2003-09-24 2004-09-16 Arme a feu a mecanisme de retardement d'ouverture de culasse

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WO (1) WO2005031242A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5013102B2 (ja) * 2005-09-08 2012-08-29 Ｊｓｒ株式会社 感放射線性樹脂組成物およびカラーフィルタ

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE706158C (de) * 1937-03-12 1941-05-19 Rheinmetall Borsig Akt Ges Selbsttaetige Feuerwaffe mit gleitendem Lauf
US2600007A (en) * 1945-04-21 1952-06-10 Oerlikon Buehrle Ag One-piece breech block for automatic firearms with pivoted locking members
US3053002A (en) * 1959-12-02 1962-09-11 Katherine B Groves Breech bolt lock
US3333508A (en) * 1967-01-30 1967-08-01 George R Kruzell Closed breech gun utilizing a hollow bolt and a firing pin as a gas cylinder and a piston, respectively
DE2914396A1 (de) * 1979-04-10 1980-10-30 Waffentechnik Gmbh Verriegeltes verschlussystem fuer handfeuerwaffen
US4580484A (en) * 1984-04-13 1986-04-08 Moore Wildey J Firearm and firearm conversion unit
US6079138A (en) * 1997-06-10 2000-06-27 Meaker; Donald L. Folded delay blowback operating system for automatic hand held firing weaponry

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE706158C (de) * 1937-03-12 1941-05-19 Rheinmetall Borsig Akt Ges Selbsttaetige Feuerwaffe mit gleitendem Lauf
US2600007A (en) * 1945-04-21 1952-06-10 Oerlikon Buehrle Ag One-piece breech block for automatic firearms with pivoted locking members
US3053002A (en) * 1959-12-02 1962-09-11 Katherine B Groves Breech bolt lock
US3333508A (en) * 1967-01-30 1967-08-01 George R Kruzell Closed breech gun utilizing a hollow bolt and a firing pin as a gas cylinder and a piston, respectively
DE2914396A1 (de) * 1979-04-10 1980-10-30 Waffentechnik Gmbh Verriegeltes verschlussystem fuer handfeuerwaffen
US4580484A (en) * 1984-04-13 1986-04-08 Moore Wildey J Firearm and firearm conversion unit
US6079138A (en) * 1997-06-10 2000-06-27 Meaker; Donald L. Folded delay blowback operating system for automatic hand held firing weaponry

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5013102B2 (ja) * 2005-09-08 2012-08-29 Ｊｓｒ株式会社 感放射線性樹脂組成物およびカラーフィルタ

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