EP0789217B1 - Arme à feu automatique à action de gaz, en particulier fusil de chasse - Google Patents

Arme à feu automatique à action de gaz, en particulier fusil de chasse Download PDF

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Publication number
EP0789217B1
EP0789217B1 EP97101318A EP97101318A EP0789217B1 EP 0789217 B1 EP0789217 B1 EP 0789217B1 EP 97101318 A EP97101318 A EP 97101318A EP 97101318 A EP97101318 A EP 97101318A EP 0789217 B1 EP0789217 B1 EP 0789217B1
Authority
EP
European Patent Office
Prior art keywords
gas
shotgun
barrel
piston
cylinders
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
EP97101318A
Other languages
German (de)
English (en)
Other versions
EP0789217A1 (fr
Inventor
Sergio Scaramucci
Rolando Caldari
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.)
Benelli Armi SpA
Original Assignee
Benelli Armi SpA
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 Benelli Armi SpA filed Critical Benelli Armi SpA
Publication of EP0789217A1 publication Critical patent/EP0789217A1/fr
Application granted granted Critical
Publication of EP0789217B1 publication Critical patent/EP0789217B1/fr
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
    • 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
    • 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
    • F41A5/20—Mechanisms or systems operated by propellant charge energy for automatically opening the lock gas-operated using a gas piston arranged concentrically around the barrel
    • 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
    • F41A5/24—Mechanisms or systems operated by propellant charge energy for automatically opening the lock gas-operated by direct action of gas pressure on bolt or locking elements
    • 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
    • F41A9/38—Loading arrangements, i.e. for bringing the ammunition into the firing position
    • F41A9/39—Ramming arrangements
    • F41A9/42—Rammers separate from breech-block
    • F41A9/44—Fluid-operated piston rammers

Definitions

  • the present invention relates to a gas-operated automatic shotgun, as for example described in FR 68 279 E.
  • Autoloading shotguns generally include a bolt mechanism linked to a piston and cylinder assembly which is operated by a portion of the gas generated on discharge of a round and bled from the gun barrel to the cylinder.
  • the gas port is generally arranged approximately in the median third of the bore, slightly more than halfway along the length of the barrel.
  • a main problem of auto-loading shotguns is the necessity to fire shells of different power and to ensure a correct operation with the weakest shells, the gas port section is rather large to allow the passage of a sufficient portion of gas. Also the diameter of the piston has to be greater than that of the bore.
  • US-4,102,242 discloses a gas-operated shotgun provided with a pair of gas cylinders mounted on opposite sides of the barrel at a somewhat forward position of the barrel.
  • the cylinders have respective pistons engaging an inertial weight slidably mounted on the magazine.
  • the inertial weight is connected to the bolt mechanism by a pair of action bars.
  • the barrel of this shotgun must have a minimum length set by the forward position of gas cylinders and related gas ports.
  • the aim of the present invention is to provide a gas operated shotgun, wherein the length of the barrel can be selected as desired while always ensuring a perfect automatic operation.
  • an object of the invention is to provide a gas operated shotgun with an improved automatic operation with respect to conventional gas operated shotguns even, especially, for example, when firing low power ammunition.
  • a further object of the invention is to provide a gas-operated shotgun wherein the expansion chamber and the piston are less subject to clogging.
  • a gas-operated shotgun generally designated by the reference numeral 1, includes a barrel 3 having a cartridge chamber 5 that is connected with the cylindrical portion 7 of the barrel by a cone portion 9.
  • a breech 11 is actuated by a kinematic system receiving energy from gas that arrives from a gas port formed in the barrel in a per se known manner.
  • a smoothbore shotgun has a breech 11 with a rotating head 13, of the type described for example in Italian patent No. 1.172.795 and in the corresponding European patent No. 0128125 and US patent No. 4.604.942, in the name of this same Applicant.
  • Shotgun 1 includes at least one gas port 15 that is located in cylindrical portion 7 of barrel 3, proximate to cone 9, and is suitable to connect the bore of barrel 3 to an expansion chamber 17 that is formed inside a cylinder 19 associated with the barrel 3 of the weapon.
  • Expansion chamber 17 is formed, at one end, by a piston 21 that can slide inside cylinder 19 and is associated with an actuation rod 23 adapted to act on breech 11 and, at the other end, by a closure 25.
  • Closure 25 is constituted by a threaded cylindrical body adapted to engage a corresponding thread 27, formed in cylinder 19.
  • the cylindrical body includes a protrusion 29 adapted to abut against the end of piston 21.
  • Closure 25 also includes a pressure limiting valve 31 constituted by a hole 33 that can be closed by a ball 35 that can move in contrast with a spring 37.
  • the shotgun according to the invention advantageously has two cylinders 19 that are arranged at the sides, between barrel 3 and magazine 39, as shown in Figure 3.
  • the operation of the shotgun according to the invention is as follows.
  • Figure 1 the firearm is shown in the idle position, ready to fire, with the breech closed, cartridge 41 in the barrel, and expansion chamber 17 empty.
  • the invention achieves the intended aim and objects, providing a shotgun which, by virtue of the characteristic position of the gas port near the cartridge chamber, can be provided with any barrel length according to the requirements.
  • a further advantage of the invention is that the gas is taken when the pressure is highest, ensuring excellent operation even with the weakest cartridges.
  • the gas cylinder has a substantially smaller diameter than conventional cylinders.
  • the diameter of the gas cylinder according to the invention is approximately half of conventional ones, thereby reducing the gas portion taken from the cartridge chamber, with consequent less clogging of the cylinder and of the piston and less energy drawn from the charge of the cartridge. This also reduces undesired effects on the shooting pattern.
  • the recoil of the shotgun would cause the bolt to initially contrast the thrust of the pistons because of their reduced diameter. This would cause a delay in the opening of the bolt and this delay is added to the delay caused by the rotating bolt head.
  • the operation of the firearm is thus greatly improved especially when using rounds with cardboard shells.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Toys (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Eye Examination Apparatus (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)
  • Endoscopes (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)
  • Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
  • Portable Nailing Machines And Staplers (AREA)

Claims (3)

  1. Fusil automatique (1) à canon lisse actionné par gaz comportant : un canon (3) ayant une partie cylindrique (7) et une chambre de cartouche (5) reliées l'une à l'autre par un cône de jonction (9), un bloc de culasse (11) relié audit canon (3) pour fermer ladite chambre de cartouche (5), un ou deux cylindres (19) reliés audit canon (3) et s'étendant sensiblement parallèlement à celui-ci, un piston (21) disposé au moins partiellement dans chaque cylindre (19) et relié de manière opérationnelle via une tige (23) à ladite culasse (11) pour ouvrir ladite culasse (11) pour recharger automatiquement le fusil (1), un bouchon (25) fixé sur chaque cylindre (19), chaque cylindre (19) définissant avec ledit piston (21) associé audit bouchon (15) une chambre d'expansion (17),
       des moyens (15) formant orifice de gaz définissant un orifice de gaz (15) s'étendant vers ladite chambre d'expansion (17) pour extraire une partie des gaz produits lors de la décharge d'un coup dans ladite chambre de cartouche (5), pour actionner ledit piston,
       caractérisé en ce que ledit orifice de gaz (15) a une partie d'entrée située le long de ladite partie cylindrique (7) et à proximité de ladite chambre de cartouche (5) à une distance à partir dudit cône de jonction (9) inférieure à la longueur du cône de jonction (4), un clapet de limitation de pression (31) étant monté sur ledit bouchon (25).
  2. Fusil selon la revendication 1, caractérisé en ce que ladite culasse (11) comporte une tête de fermeture rotative (13).
  3. Fusil selon la revendication 1, caractérisé en ce qu'il comporte deux cylindres reliés audit canon (3) sur des côtés opposés de celui-ci et s'étendant sensiblement parallèlement à celui-ci, deux pistons (21) chacun étant disposé au moins partiellement dans un cylindre respectif desdits cylindres (19) et relié de manière opérationnelle via une tige respective (23) à ladite culasse (11) pour ouvrir ladite culasse (11) pour recharger automatiquement le fusil (1), deux bouchons (25) reliés à un cylindre respectif desdits cylindres (19), chacun desdits cylindres (19) et le piston respectif (21) associé au bouchon respectif (25) définissant ladite chambre d'expansion (17), lesdits moyens (15) formant orifice de gaz définissant deux orifices de gaz (15) s'étendant chacun vers une chambre respective desdites chambres d'expansion (17) pour extraire une partie des gaz produits lors de la décharge d'un coup dans ladite chambre de cartouche, pour actionner ledit piston (21).
EP97101318A 1996-02-08 1997-01-29 Arme à feu automatique à action de gaz, en particulier fusil de chasse Expired - Lifetime EP0789217B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI960229 1996-02-08
IT96MI000229A IT1282015B1 (it) 1996-02-08 1996-02-08 Arma automatica a presa di gas

Publications (2)

Publication Number Publication Date
EP0789217A1 EP0789217A1 (fr) 1997-08-13
EP0789217B1 true EP0789217B1 (fr) 2003-03-26

Family

ID=11373182

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97101318A Expired - Lifetime EP0789217B1 (fr) 1996-02-08 1997-01-29 Arme à feu automatique à action de gaz, en particulier fusil de chasse

Country Status (12)

Country Link
EP (1) EP0789217B1 (fr)
JP (1) JP3935544B2 (fr)
KR (1) KR100492678B1 (fr)
AT (1) ATE235670T1 (fr)
BR (1) BR9700912A (fr)
DE (1) DE69720089T2 (fr)
EA (1) EA000324B1 (fr)
ES (1) ES2196203T3 (fr)
IL (1) IL120103A (fr)
IT (1) IT1282015B1 (fr)
TR (1) TR199700089A2 (fr)
ZA (1) ZA97904B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8065949B1 (en) 2006-05-24 2011-11-29 Remington Arms Company, Inc. Gas-operated firearm
US8109194B2 (en) 2009-03-20 2012-02-07 Ra Brands, L.L.C. Clamped gas block for barrel

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1311772B1 (it) * 1999-12-10 2002-03-19 Beretta Armi Spa Fucile con presa gas perfezionato.
US6634274B1 (en) * 2000-12-11 2003-10-21 Geoffrey Andrew Herring Firearm upper receiver assembly with ammunition belt feeding capability
IT1319535B1 (it) * 2000-12-14 2003-10-20 Benelli Armi Spa Arma da fuoco a ripetizione

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3125930A (en) * 1964-03-24 x x x s s
CH19463A (de) * 1899-05-29 1900-07-31 Mannlicher Ferdinand Ritter Vo Automatische Feuerwaffe
FR390196A (fr) * 1908-05-13 1908-09-28 The Mcclean Arms & Ordnance Company Perfectionnements apportés aux canons automatiques se chargeant par la culasse et actionnés par les gaz
US1388856A (en) * 1917-07-30 1921-08-30 Ansley H Fox Company Machine-gun
CH89832A (de) * 1917-11-10 1921-07-01 Johannes Roethlisberger Riegelantriebvorrichtung an Selbstladern mit Geradezugverschluss.
US2144241A (en) * 1936-06-01 1939-01-17 Eiane Halvor Olsen Automatic rifle
FR1130035A (fr) * 1955-04-25 1957-01-30 Perfectionnements aux fusils de chasse à répétition automatique
NL132548C (fr) * 1964-03-20
US4015512A (en) * 1974-10-29 1977-04-05 Feerick Jay J Gas-operated firearm
US4102242A (en) * 1975-08-04 1978-07-25 O. F. Mossberg & Sons, Inc. Autoloading gas-operated firearm
US4270437A (en) * 1977-09-01 1981-06-02 Donovan John S Gas operated automatic weapon

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8065949B1 (en) 2006-05-24 2011-11-29 Remington Arms Company, Inc. Gas-operated firearm
US8109194B2 (en) 2009-03-20 2012-02-07 Ra Brands, L.L.C. Clamped gas block for barrel

Also Published As

Publication number Publication date
ZA97904B (en) 1997-08-01
KR100492678B1 (ko) 2005-08-17
ES2196203T3 (es) 2003-12-16
ITMI960229A1 (it) 1997-08-08
ITMI960229A0 (fr) 1996-02-08
IL120103A (en) 2001-03-19
KR970062646A (ko) 1997-09-12
IL120103A0 (en) 1997-04-15
TR199700089A2 (tr) 1997-08-21
EA199700017A1 (ru) 1997-09-30
BR9700912A (pt) 1998-09-01
JP3935544B2 (ja) 2007-06-27
ATE235670T1 (de) 2003-04-15
DE69720089T2 (de) 2003-11-27
IT1282015B1 (it) 1998-03-06
EA000324B1 (ru) 1999-04-29
DE69720089D1 (de) 2003-04-30
EP0789217A1 (fr) 1997-08-13
JPH09217998A (ja) 1997-08-19

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