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
  • F41A19/00—Firing or trigger mechanisms; Cocking mechanisms
  • F41A19/06—Mechanical firing mechanisms, e.g. counterrecoil firing, recoil actuated firing mechanisms
  • F41A19/25—Mechanical firing mechanisms, e.g. counterrecoil firing, recoil actuated firing mechanisms having only slidably-mounted striker elements, i.e. percussion or firing pins
  • F41A19/27—Mechanical firing mechanisms, e.g. counterrecoil firing, recoil actuated firing mechanisms having only slidably-mounted striker elements, i.e. percussion or firing pins the percussion or firing pin being movable relative to the breech-block
  • F41A19/29—Mechanical firing mechanisms, e.g. counterrecoil firing, recoil actuated firing mechanisms having only slidably-mounted striker elements, i.e. percussion or firing pins the percussion or firing pin being movable relative to the breech-block propelled by a spring under tension
  • F41A19/30—Mechanical firing mechanisms, e.g. counterrecoil firing, recoil actuated firing mechanisms having only slidably-mounted striker elements, i.e. percussion or firing pins the percussion or firing pin being movable relative to the breech-block propelled by a spring under tension in bolt-action guns
  • F41A19/33—Arrangements for the selection of automatic or semi-automatic fire
• • 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
  • F41A21/16—Barrels or gun tubes characterised by the shape of the bore
  • F41A21/18—Grooves-Rifling
• • 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
  • F41A5/00—Mechanisms or systems operated by propellant charge energy for automatically opening the lock
  • F41A5/18—Mechanisms or systems operated by propellant charge energy for automatically opening the lock gas-operated
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F41—WEAPONS
  • F41C—SMALLARMS, e.g. PISTOLS, RIFLES; ACCESSORIES THEREFOR
  • F41C23/00—Butts; Butt plates; Stocks
  • F41C23/04—Folding or telescopic stocks or stock parts
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F41—WEAPONS
  • F41C—SMALLARMS, e.g. PISTOLS, RIFLES; ACCESSORIES THEREFOR
  • F41C23/00—Butts; Butt plates; Stocks
  • F41C23/22—Stocks having space for the storage of objects

Definitions

• the invention relates to hand automatic firearms.
• 7.62 mm AK-47 Kalashnikov assault rifle (see Manual on firing, 7.62 mm AK Kalashnikov assault rifle, M. DOSAAF Publishing House, 1 969) has a receiver, a barrel with cartridge chamber and a rifled part, a bolt support with a bolt, a trigger and firing mechanism with a firing trigger, firing hammer and autosafety and an unfolding butt.
• the shortcomings of this model are low reliability, failure of the rifle when it is used in extreme climatic and non-standard conditions, relatively low accuracy of fire, insufficient operational characteristics.
• the object of the claimed invention is to increase reliability and operational characteristics of the rifle.
• the assault rifle features a receiver, a breech locking mechanism comprising a turning bolt with a firing pin placed in the bolt support installed on rails of the receiver and having a rear lug interacting with the firing hammer, the trigger and firing lock comprising a hammer and a sear of autosafety with sear notch, a gas-escape mechanism with a gas tube and a piston the rod of which is installed in the hole of the bolt support, a folding butt with retainers of firing and stowed positions and a barrel with a rear-sight bed comprising a cartridge chamber and a rifled portion.
• the novelty of the claimed device is that the bolt support is made in such a way that it can interact in the front position with the tapered supporting surface of the receiver; the rear lug of the bolt support has such length which prevents contact of the firing hammer with the firing pin when the bolt support recoils; the rod is placed in the bolt support in such a way that it allows for limited angular displacement, and the gas tube is equipped with a lug contacting the slot of the rear sight bed.
• the rod of the gas piston is inserted into the hole of the bolt support with the help of threading with clearance.
• the sear of autosafety is equipped with a sear notch of hand reloading in the form of a platform on the sear placed at a distance from the path of the bolt support providing contact of the bolt support with the firing hammer; the platform of the automatic sear notch of the sear is made at a distance from the path of the bolt support providing a clearance between the bolt support and the firing hammer.
• the gas escape tube is spring-loaded with respect to the rear-sight bed in the direction of the muzzle end.
• FIG. 1 General view of the assault rifle;
• Fig. 2 View A in Fig. 1 , the bolt support in the front position in contact with the lug of the receiver;
• FIG. 4 cross-sectional view G-G in Fig. 3;
• Fig. 1 1 butt, magnification D in Fig. 8;
• Fig. 1 2 barrel (cross-section);
• FIG. 1 3 side view of the rifling in the barrel, cross-section E-E in Fig. 1 2;
• Fig. 1 4 not ⁇ f( in Fig. 1 3; and Fig. 1 5 note M in Fig. 3.
• the claimed automatic weapon (Fig. 1 ) contains a receiver 1 to which the barrel 2 is attached at the front and a folding plastic butt 3 at the back. On the barrel a rear-sight bed 4 and a gas chamber 5 are installed; between them a gas tube 6 is placed.
• the breech locking mechanism is installed (Fig. 3) comprising a turning bolt 8 with a firing pin 9 placed in the bolt support 1 0.
• the bolt support has a rear lug 1 1 ; in the hole of the bolt support a rod 1 2 with a piston 1 3 is fixed with the help of threading with clearance.
• the bolt support has a tapered supporting platform 1 4 (Fig.
• a lug 1 5 with a reciprocal tapered platform 1 6 is made on the receiver.
• the gas tube has a lug 1 7 down at the back which fits into the slot 1 8 of the rear-sight bed 4 and is spring- loaded by spring 1 9 in the direction of the muzzle end.
• a trigger and firing mechanism is placed (Fig. 6) containing a firing hammer 20 and an autosafety with a sear 21 featuring hand reloading sear notch in the form of a platform 22 and an automatic sear notch in the form of a platform 23 (Fig. 7).
• the butt 3 is fixed on a hinge.
• a hollow plastic case 25 a buttplate 26, a pusher 27 with a lug 28 which contacts the retainer of the stowed position 29.
• Inside the butt case reinforcing ribs 30 (Fig. 1 0) are made which form a trap 31 for the box 32 with accessories.
• the box is spring-loaded by a spring 33 and rests against a turning cap 34 the lower lug 35 (Fig. 1 1 ) of which contacts the reciprocal lug 36 of the pusher 27.
• the side recess 37 (Fig. 9) on the outer surface of the butt is made in the form of a seat to house the night-sight leaf 38 fixed on the receiver 1 .
• the barrel 2 of the rifle (Fig. 1 2) comprises a cartridge chamber 40 with a supporting cone 41 and a rifled portion comprising a land conic taper 42, an additional conic area 43 and a cylinder portion 44.
• the rifled portion of the barrel is a profile with rifling and lands (Figs. 1 3, 1 4) . Transition between them comprises clearlyab" portion with the radius r , mecanicbc" portion with the radius r 2 and expedicd" portion which is tangent n to radius r which is normal to surface S passing through the bore axis and the centre of the land; d is the land diameter and d R is the rifling diameter.
• the automatic weapon operates in the following manner. To load the rifle it is necessary to pull the bolt support 1 0 backwards and release it abruptly. When the bolt support is pulled backward ist rear lug 1 1 cocks the hammer 20 which engages the sear notch of hand reloading 22 of the sear 21 of autosafety at a distance from the path of the bolt support which results in interference K between the hammer and the bolt support. When the firing trigger is pressed a shot takes place and powder gases actuate the bolt support via the piston 1 3 with the rod 1 2 and throw it back.
• the additional conic area 43 promotes a smoother, more uniform cutting-in of the bullet reducing the specific pressure of the bullet on the lands. All that promotes smoother defomation of the bullet according to the form of the lands and increases the service life of the barrel.
• Availability of the curved transition surface from the lands to the rifling sesabc" formed by radii ⁇ and r 2 , and a linear section responsiblecd" along the tangent allows for better filing the rifling by the bullet jacket thus preventing powder gas leakage and increasing stability of the bullet muzzle velocity.
• the plastic butt 3 can be folded from firing position to stowed position and vice versa.
• the retainer 29 of the stowed position engages the side edge of the buttplate 26 and by its tooth fixes the butt in the stowed position.
• the night-sight leaf 38 is placed into the pocket 37 on the outer surface of the butt.
• the cap 34 of the buttplate 26 With a finger; the cap will turn and open the hole in the buttplate.
• the spring 33 the box will withdraw from the hole formed by the reinforcing ribs 30 in the cavity of the butte case 25.
• the spring-loaded cap 34 will turn back to the initial position; to do this the lower lug 35 of the cap interacting with the lug 36 of the pusher 27 will move the pusher to the backward position.
• the claimed invention completely solves the aimed technical problem: increase of reliability and operation characteristics, and it will be widely spread in new models of navalKalashnikov Assault Rifle" design manufactured at present (AK 1 01 , AK 102, AK 1 03, AK 104, AK 1 05 etc.).

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Toys (AREA)
• Percussive Tools And Related Accessories (AREA)
• Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
• Portable Nailing Machines And Staplers (AREA)
• Slide Fasteners (AREA)
• Hinges (AREA)
• Safety Valves (AREA)

Priority Applications (8)

Applications Claiming Priority (2)

Publications (1)

Family

ID=8161419

Family Applications (1)

Country Status (12)

Cited By (12)

Families Citing this family (4)

Citations (1)

• 1997
  • 1997-12-24 TR TR2000/00215T patent/TR200000215T2/xx unknown
  • 1997-12-24 UA UA2000010367A patent/UA45494C2/uk unknown
  • 1997-12-24 CZ CZ2000209A patent/CZ293481B6/cs not_active IP Right Cessation
  • 1997-12-24 WO PCT/IB1997/001597 patent/WO1999005467A1/en active IP Right Grant
  • 1997-12-24 AU AU52338/98A patent/AU5233898A/en not_active Abandoned
  • 1997-12-24 CN CN97182312A patent/CN1071449C/zh not_active Expired - Fee Related
  • 1997-12-24 HU HU0002969A patent/HU222414B1/hu not_active IP Right Cessation
  • 1997-12-24 PL PL97338250A patent/PL185081B1/pl not_active IP Right Cessation
  • 1997-12-24 SI SI9720099A patent/SI20224A/sl not_active IP Right Cessation
  • 1997-12-24 RO ROA200000069A patent/RO119094B1/ro unknown
• 2000
  • 2000-01-20 FI FI20000117A patent/FI113802B/fi not_active IP Right Cessation
  • 2000-01-21 BG BG104097A patent/BG104097A/xx unknown

Patent Citations (1)

Non-Patent Citations (4)

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