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GB1439348A - Automatic firearm with gas actuated breech mechanism - Google Patents

Automatic firearm with gas actuated breech mechanism

Info

Publication number
GB1439348A
GB1439348A GB4717373A GB4717373A GB1439348A GB 1439348 A GB1439348 A GB 1439348A GB 4717373 A GB4717373 A GB 4717373A GB 4717373 A GB4717373 A GB 4717373A GB 1439348 A GB1439348 A GB 1439348A
Authority
GB
United Kingdom
Prior art keywords
block
actuating member
breech
firing
move
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
Application number
GB4717373A
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.)
Forces Armees Francaises
Original Assignee
Forces Armees Francaises
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 Forces Armees Francaises filed Critical Forces Armees Francaises
Publication of GB1439348A publication Critical patent/GB1439348A/en
Expired legal-status Critical Current

Links

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
    • F41A3/38—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
    • 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
    • F41A5/22—Mechanisms or systems operated by propellant charge energy for automatically opening the lock gas-operated having two or more gas pistons

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Automotive Seat Belt Assembly (AREA)
  • Pinball Game Machines (AREA)

Abstract

1439348 Gas operated automatic firearms FRANCE ARMED FORCES MINISTER OF 9 Oct 1973 [10 Oct 1972] 47173/73 Heading F3C An actuating member 7 embracing a longitudinally movable breech block 1 of an automatic firearm has a chamber having a slider 13 movable rearwardly by a movable unit 10 of a gas-actuated mechanism upon firing to first move the actuating member relative to the breech block to allow a retractable bolt 5 to be moved from a position locking the block in a casing 2 in the firing position to a released position, and then move the block to an inoperative position, the slider comprising a longitudinally extending portion projecting forwardly at an outer periphery of the actuating member and having a forwardly facing stop surface for movable unit engagement, a rearwardly facing abutment surface for engaging a wall of the chamber to move the actuating member, and a transversely extending portion projecting towards the breech block at an inner periphery of the actuating member and having forwardly of the abutment surface a rearwaidly facing surface 13c for engagement with a complementary surface E1 on the block. During the firing of a shot the breech block 1 is held by two pivotable retractable bolts 5 engaging the breech casing 2 and kept in position by tabs 7a of the actuating member 7; recoil gases from firing act on pistons of two movable units 10 which move the member 7 via respective rectangular cross-section sliders 13 over a great enough distance relative to the block 1 to release the bolts 5. Frusto-conical shoulders E2 of the units 10 then retract the bolts 5 via push rods 15 and simultaneously the surfaces 13c of respective sliders 13 abut respective faces E1 of the block 1 to withdraw the block. Subsequently, the member 7 abuts the breech block 1 with reduced impact since both are moving rearwardly. The member 7 has two return springs 3, and a stack of frusto-conical washers 4 cushion the recoil of the block 1. For rearming a pyrotechnic charge provides gases to produce a similar sequence of actions. The pistons of the units 10 have leading ends 16 sliding with friction in bores 17 of hollow pistons 10b.
GB4717373A 1972-10-10 1973-10-09 Automatic firearm with gas actuated breech mechanism Expired GB1439348A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7235764A FR2202584A5 (en) 1972-10-10 1972-10-10

Publications (1)

Publication Number Publication Date
GB1439348A true GB1439348A (en) 1976-06-16

Family

ID=9105386

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4717373A Expired GB1439348A (en) 1972-10-10 1973-10-09 Automatic firearm with gas actuated breech mechanism

Country Status (11)

Country Link
US (1) US3872771A (en)
AU (1) AU476133B2 (en)
CA (1) CA997182A (en)
CH (1) CH579251A5 (en)
DE (1) DE2350629C2 (en)
ES (1) ES419532A1 (en)
FR (1) FR2202584A5 (en)
GB (1) GB1439348A (en)
IL (1) IL43415A (en)
IT (1) IT994771B (en)
ZA (1) ZA737825B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3045831C2 (en) * 1980-12-05 1984-06-14 Mauser-Werke Oberndorf Gmbh, 7238 Oberndorf Support flap for a rigidly closing breech of automatic firearms
DE102009056253B3 (en) * 2009-12-01 2011-05-19 Rheinmetall Waffe Munition Gmbh Rebound barrier for gas pressure boosters in particular

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH261658A (en) * 1945-12-06 1949-05-31 Oerlikon Buehrle Ag Automatic firearm with one-piece breech block.
BE474539A (en) * 1946-01-16
FR1602862A (en) * 1964-01-03 1971-02-08

Also Published As

Publication number Publication date
DE2350629C2 (en) 1983-11-03
FR2202584A5 (en) 1974-05-03
CA997182A (en) 1976-09-21
AU6120273A (en) 1975-04-10
IL43415A (en) 1977-03-31
IL43415A0 (en) 1974-03-14
IT994771B (en) 1975-10-20
AU476133B2 (en) 1976-09-09
CH579251A5 (en) 1976-08-31
ZA737825B (en) 1974-08-28
ES419532A1 (en) 1976-05-01
US3872771A (en) 1975-03-25
DE2350629A1 (en) 1974-04-25

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee