US3789730A - Automatic weapon with self locking bolt breech block - Google Patents

Automatic weapon with self locking bolt breech block Download PDF

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Publication number
US3789730A
US3789730A US00174369A US3789730DA US3789730A US 3789730 A US3789730 A US 3789730A US 00174369 A US00174369 A US 00174369A US 3789730D A US3789730D A US 3789730DA US 3789730 A US3789730 A US 3789730A
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US
United States
Prior art keywords
breech block
weapon
locking bolt
breech
cartridge
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.)
Expired - Lifetime
Application number
US00174369A
Other languages
English (en)
Inventor
A Helmes
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.)
Rheinmetall Industrie AG
Original Assignee
Rheinmetall GmbH
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 Rheinmetall GmbH filed Critical Rheinmetall GmbH
Application granted granted Critical
Publication of US3789730A publication Critical patent/US3789730A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F41A9/00—Feeding or loading of ammunition; Magazines; Guiding means for the extracting of cartridges
    • F41A9/37—Feeding two or more kinds of ammunition to the same gun; Feeding from two sides
    • 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
    • F41A3/38—Semi-rigid bolt locks, i.e. having locking elements movably mounted on the bolt or on the barrel or breech housing having rocking locking elements, e.g. pivoting levers or vanes
    • F41A3/40—Semi-rigid bolt locks, i.e. having locking elements movably mounted on the bolt or on the barrel or breech housing having rocking locking elements, e.g. pivoting levers or vanes mounted on the bolt

Definitions

  • An automatic weapon including a self locking bolt which comprises a weapon casing defining a loading chamber.
  • a breech block moves forwards and back and is adapted to insert a cartridge into the loading chamber during the forward movement of the breech block.
  • At least three laterally pivotable locking bolts are provided symmetrically to the longitudinal central axis of the breech block, for complete locking of the breech block against the weapon casing.
  • the present invention relates to an automatic weapon with self locking bolt breech block.
  • Breech blocks for automatic weapons in which the breech block is locked to the breech housing by means of pivotable locking bolts, are generally referred to as self locking bolt breech blocks.
  • the locking bolts are pivotally mounted at both sides in the breech block.
  • the locking bolts pivot outwardly and engage in appropriate recesses provided in the breech housing, in which case the forces acting on the breech block of the breech at the time of firing are transmitted by the locking bolts to the weapon or breech housing.
  • considerable surface pressure is applied to the support faces at the breech block and the breech housing.
  • a comparatively short recoil path for the breech block and a comparatively small recoil force of the breech block are desired.
  • the breech block should thus, on the one hand, be as short as possible and, on the other hand, should be kept as small as possible in lateral dimension. Further, a short recoil path for the breech block is very desirable, so that despite the desired high rate of fire the velocity of the breech block can be kept comparatively low, which, together with a short breech block enable a favorably low recoil force to be obtained.
  • the recoil path of the breech block is dependent both on the cartridge length and on the distance between the cartridge magazine and loading chamber. Thus, attempts are made to keep this distance as small as possible, in order to facilitate a rapid insertion of the cartridges, into the loading chamber.
  • one object of the present invention to provide an automatic weapon with a self locking bolt breech block which with the same or smaller dimensions relative to known breech blocks of this type, provides an increase in efficiency of the gun; in particular with comparatively small dimensions and low weight relative to customary locking bolt breech blocks, the breech block should facilitate a greater rate of fire and provide a capacity to withstand greater supporting forces.
  • this has the advantage that, with the same or even smaller width relative to the customary arrangement, the breech block can support greater forces and secondly, the centering of the breech block is improved. Therefore, without any danger of tilting, the breech block can be kept shorter, which in addition helps towards the desired reduction of the breech block weight despite an increase in efficiency.
  • one of the locking bolts is advantageously located in the vertical, longitudinal central plane of the gun, due to which the width of the breech block and the gun can be kept small.
  • two cartridge magazine devices can be brought close to the gun and to'the breech block by which means a rapid change from one type of ammunition to another is possible.
  • two apertures for the cartridge magazine are provided in the gun casing which seen in cross section are located respectively between two adjacent locking bolts.
  • FIG. 1 is a partial longitudinal section through the casing of an automatic weapon and the breech block
  • FIG. 2 is a cross-section along the lines II II of FIG. 1;
  • FIG. 3 is a cross-section along the lines III III of FIG. 1.
  • the weapon casing 1 is located a multi-part breech block 2, which moves back and forwards, and which for each forward movement inserts a cartridge into a loading chamber 3 of the gun.
  • the breech block is self locking and consists essentially of a breech head 4, a breech block body 5 and support flaps 6 and 6.
  • the breech head there are provided three locking bolts symmetrical to the longitudinal central axis of the breech block which are mounted to pivot radially in the breech head by means or semi-cylindrical support faces 7.
  • the breech block body 5 is connected to the breech head 4 to slide by the length s.
  • the locking breech block body lags behind the breech block head by the length s, the locking bolt 6 being pivoted, as shown in dot-dash lines in F IG; 1.
  • the locking bolts are pressed outwards by means of the inclined faces 9 provided on the following locking breech block body, by which means they enter the recesses 10 provided in the weapon casing and the breech block assumes the locked position according to FIG. 1.
  • the breech block 2 is guided in the weapon casing by means of guide faces 11 and 11 arranged in a circular arc, these guide faces being located radially to the locking bolts 6 and 6. Symmetrical to the vertical longitudinal central plane there are provided in the weapon casing in the region between two adjacent guide faces supply openings 12, 12 cartridges, in which the bodies 13, 13' of cartridge supply magazines engage. In order to be able to supply the cartridges as near as possible to the breech block 2, the latter has chord-like truncations 14, 14' in the peripheral region between the guide haces 11 and 11.
  • the cartridge supply magazines are pivotally connected to each other by a small amount, so that either a cartridge from the case 13 or the case 13 is gripped at will by the forward face of the counterrecoiling breech block head and is inserted into the loading chamber 3.
  • an extractor claw 15 is guided to move radially against the force of a spring 16.
  • the spring 16 consists of a closed spring ring (FIG. 2), which is arranged in a groove 16 located near the forward face of the breech head 4.
  • An automatic weapon including a self locking bolt comprising a weapon casing defining a loading chamber
  • breech block moving forwards and back and adapted to insert a cartridge into said loading chamber during the forward movement of said breech block
  • At least three laterally pivotable locking bolt means provided symmetrically to the longitudinal central axis of said breech block, for complete locking of said breechblock against said weapon casing,
  • one of said locking bolts is arranged in the vertical longitudinal central plane of said weapon casing,
  • said weapon casing has two apertures for receiving one end of each of said cartridge magazines,
  • each of said cartridge magazines is disposed between two adjacent locking bolt means.
  • An automatic weapon including a self locking bolt comprising a weapon casing defining a loading chamber,
  • breech block moving forwards and back and adapted to insert a cartridge into said loading chamber during the forward movement of said breech block
  • At least three laterally pivotable locking bolt means provided symmetrically to the longitudinal central axis of said breechblock, for complete locking of said breech block against said weapon casing,
  • said weapon casing includes guide faces constituting arcs of a circle in cross-section arranged around a closed sector thereof for guidance of said breech block during its forward and backward movement, and
  • said guide faces are provided radially to said locking bolt means
  • said breech block in cross section, has chord-like truncations between said guide faces.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
  • Toys (AREA)
US00174369A 1970-09-11 1971-08-24 Automatic weapon with self locking bolt breech block Expired - Lifetime US3789730A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2044964A DE2044964C3 (de) 1970-09-11 1970-09-11 Automatische Schnellfeuerwaffe mit Stützriegelverschluß

Publications (1)

Publication Number Publication Date
US3789730A true US3789730A (en) 1974-02-05

Family

ID=5782161

Family Applications (1)

Application Number Title Priority Date Filing Date
US00174369A Expired - Lifetime US3789730A (en) 1970-09-11 1971-08-24 Automatic weapon with self locking bolt breech block

Country Status (5)

Country Link
US (1) US3789730A (de)
CH (1) CH524801A (de)
DE (1) DE2044964C3 (de)
FR (1) FR2107438A5 (de)
GB (1) GB1338897A (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4119012A (en) * 1975-10-18 1978-10-10 Rheinmetall Gmbh Double-feed sprocket arrangement for munition changing
US7107715B2 (en) 2003-05-23 2006-09-19 Ra Brands, L.L.C. Bolt assembly with locking system
US8733009B2 (en) 2012-01-06 2014-05-27 Ra Brands, L.L.C. Magazine cutoff
US8800422B2 (en) 2012-08-20 2014-08-12 Ra Brands, L.L.C. Bolt assembly for firearms
US9417019B2 (en) 2012-08-24 2016-08-16 Ra Brands, L.L.C. Fire control for auto-loading shotgun

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3045831C2 (de) * 1980-12-05 1984-06-14 Mauser-Werke Oberndorf Gmbh, 7238 Oberndorf Stützklappe für einen starr schließenden Verschluß von automatischen Feuerwaffen
ITRM20130425A1 (it) * 2013-07-18 2015-01-19 Piergiorgio Cataldi Meccanismo di riarmo per armi semiautomatiche da caccia e/o da tiro

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB617142A (en) * 1945-09-21 1949-02-01 Zbrojovka Brno Np Improvements connected with breech bolts for small arms and cartridge extractor actuating springs therefor
US2861374A (en) * 1957-02-01 1958-11-25 Samuel L Hampton Slide bolt action for firearms
US2948195A (en) * 1957-02-07 1960-08-09 Mach Tool Works Oerlikon Admin Breech mechanism for automatic firearms

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB617142A (en) * 1945-09-21 1949-02-01 Zbrojovka Brno Np Improvements connected with breech bolts for small arms and cartridge extractor actuating springs therefor
US2861374A (en) * 1957-02-01 1958-11-25 Samuel L Hampton Slide bolt action for firearms
US2948195A (en) * 1957-02-07 1960-08-09 Mach Tool Works Oerlikon Admin Breech mechanism for automatic firearms

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4119012A (en) * 1975-10-18 1978-10-10 Rheinmetall Gmbh Double-feed sprocket arrangement for munition changing
US7107715B2 (en) 2003-05-23 2006-09-19 Ra Brands, L.L.C. Bolt assembly with locking system
US20070107290A1 (en) * 2003-05-23 2007-05-17 Ra Brands, L.L.C. Bolt assembly with locking system
US7219461B1 (en) 2003-05-23 2007-05-22 Ra Brands, L.L.C. Bolt assembly with locking system
US8733009B2 (en) 2012-01-06 2014-05-27 Ra Brands, L.L.C. Magazine cutoff
US8800422B2 (en) 2012-08-20 2014-08-12 Ra Brands, L.L.C. Bolt assembly for firearms
US9417019B2 (en) 2012-08-24 2016-08-16 Ra Brands, L.L.C. Fire control for auto-loading shotgun

Also Published As

Publication number Publication date
GB1338897A (en) 1973-11-28
CH524801A (de) 1972-06-30
DE2044964C3 (de) 1975-10-23
DE2044964A1 (de) 1972-03-16
FR2107438A5 (de) 1972-05-05
DE2044964B2 (de) 1975-03-06

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