US3810412A - Gas cylinder for firearms - Google Patents

Gas cylinder for firearms Download PDF

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Publication number
US3810412A
US3810412A US00294594A US29459472A US3810412A US 3810412 A US3810412 A US 3810412A US 00294594 A US00294594 A US 00294594A US 29459472 A US29459472 A US 29459472A US 3810412 A US3810412 A US 3810412A
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US
United States
Prior art keywords
piston
tubular
cylindrical member
gas cylinder
gas
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
US00294594A
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English (en)
Inventor
E Zamacola
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US3810412A publication Critical patent/US3810412A/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
    • 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
    • F41A5/26—Arrangements or systems for bleeding the gas from the barrel

Definitions

  • a gas cylinder for firearms includes a cylindrical hollow body fixed to the lower part of the barrel and loosely fixed to the tubular receiver or tubular magazine of the-fire-arm. Such body is gas sealed as its bottom end with regard to the tubular magazine and has in its interior a piston which exactly fits into its inner surface and which can slide or be guided by the tubular magazine on being pushed or urged by the gasses which originate form a shot.
  • the cylindrical body is interiorly stepped into two different diameters and the piston is loosely mounted on the tubular magazine and is prolonged, as a continuation of its adjustment area with the inner surface of the cylinder, into a coaxial tubular projections.
  • Gas tight sealing of the cylindrical body or body of the gas cylinder is achieved with regard to the tubular magazine, by means of a joint or gland mounted on the smaller diameter part of such body which are held in place by a flexible washer or ring which fits on such coaxial projection of the piston.
  • a gas cylinder having a short travel distance used in automatic firearms provided with a feed receiver or tubular magazine is composed of a hollow cylindrical body which is mounted on the lower part of the barrel and which embraces the magazine tube, jointly forming an annular chamber.
  • the aforementioned cylindrical body is secured over the magazine tube by means of a radial end thickening which is situated at the muzzle of the barrel.
  • Such thickening acts as a centralizer of the mentioned tube so as to keep it in a perfectly co-axial position with respect to the cylinder.
  • gas tight sealing means are provided to prevent gas leakage.
  • the cylindrical body which in fact comprises the body of the cylinder, has a port which communicates with the cavity of the barrel and which receives a piston in its interior which is capable of moving axially.
  • the axial movement of the piston is guided by the magazine tube.
  • the outer surface of the piston should fit over the inner surface of the body of the gas cylinder, and the inner surface of the piston should fit over the outer surface of the magazine tube so that gases generated during a shot which enter, into the annular chamber which is situated between the body of the gas cylinder and the magazine tube, through the port cannot escape until after the piston has been moved. 7
  • expansion of the gas generated by a shot causes provokes a short but brusque movement of the piston, which is sufficient to impart the necessary force to the intertia mass so that on moving it provokes the readyfor-fire position of the arm.
  • the improvements of the present invention directed toward the elimination of the need to adjust the piston over the magazine tube so that displacement of the moving pieces of the device (piston and inertia mass) can take place, completely independent of the more or less ideal state with regard the outer surface of the magazine tube.
  • the bodyof the cylinder (2) which is installed under the barrel (1 with which it communicates by means of an inclined opening at port (8) in accordance with the usual arrangement has, an inner radial thickening (21) situated at the muzzle of the barrel, within which the magazine tube or tubular receiver (9) is fitted, which simultaneously serves to keep the tube concentric in the interior of the body of the gas cylinder for the purpose of guaranteeing free movement of the piston, as well as to support the barrel of the firearm.
  • Such barrel is snugly fitted to the receiver of the cover of the mechanisms, by its chamber and held down by screw type stopper (ll), screwed into the grooves of the end of the feed receiver (9).
  • Said inertia mass (12) is attached by means of connecting rods to those mechanisms whose movements should be provoked by the motion of the piston.
  • the body of the gas cylinder (2) has an interior cavity stepped into two different diameters.
  • the piston has a flap or tubular projection of considerable length, which is coaxially extended with respect to its adjustment area and directed toward the inner surface of the body of the gas cylinder.
  • the part of the piston which fits over the inner surface of the body of the gas cylinder. precisely fits on the area of greater diameter of the body of the cylinder.
  • the projection or coaxial tubular flap is housed in the part of said body having a smaller diameter, an end of which, when the leans against the inner radial thickening of the cylinder body when the assembly is at rest. Said inner radial thickening constitutes the supporting and centering means for the magazine tube (9).
  • the operation of the firearm occurs as can easily be understood, is produced when, after a shot, a portion of the gas, which drives the bullet, passes into the pressure chamber (7) of the body of the gas cylinder, through the port or opening (8) moving the piston (5) under the pressure which the gas exerts against the surface of the inner side of its collar. This movement lasts as long as the flow of gas under pressure continues and while the inner (3) and exterior (6) joints maintain their gas tight condition.
  • the short active movement of the piston is sufficient for its impulse to be transmitted to the inertia mass (12) in such a way that the inertia mass actuates the locking device of the firearm even after the piston has ceased, moving without stopping until it achieves a blocking of the breech; compression of the recovery elements and the assembly of the discharge battery.
  • a gas cylinder for firearms having a tubular receiver comprising a hollow cylindrical member having a radial end thickening at one end thereof for centrally supporting said tubular receiver, the interior of said hollow cylindrical member being comprised of two regions of different diameters in stepped relation, an annular chamber being defined by said centrally supported tubular receiver and the inner peripheral porin gas tight relation with the tubular projection.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Toys (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
US00294594A 1972-07-10 1972-10-03 Gas cylinder for firearms Expired - Lifetime US3810412A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES1972182287U ES182287Y (es) 1972-07-10 1972-07-10 Bomba de gases para armas automaticas de deposito tubular.

Publications (1)

Publication Number Publication Date
US3810412A true US3810412A (en) 1974-05-14

Family

ID=8355011

Family Applications (1)

Application Number Title Priority Date Filing Date
US00294594A Expired - Lifetime US3810412A (en) 1972-07-10 1972-10-03 Gas cylinder for firearms

Country Status (7)

Country Link
US (1) US3810412A (enrdf_load_stackoverflow)
JP (1) JPS5219719B2 (enrdf_load_stackoverflow)
DE (1) DE2255287C3 (enrdf_load_stackoverflow)
ES (1) ES182287Y (enrdf_load_stackoverflow)
FR (1) FR2192696A5 (enrdf_load_stackoverflow)
GB (1) GB1404176A (enrdf_load_stackoverflow)
IT (1) IT965456B (enrdf_load_stackoverflow)

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3945296A (en) * 1973-03-12 1976-03-23 Valmet Oy Gas piston in a firearm
US3996837A (en) * 1975-05-08 1976-12-14 General Electric Company Seal
US4085654A (en) * 1975-09-29 1978-04-25 Luigi Franchi S.P.A. Gas-operated device for activating the reloading mechanism of a gas-operated automatic rifle
US4109558A (en) * 1975-11-21 1978-08-29 Luigi Franchi S.P.A. Semi-automatic gun
US5872323A (en) * 1997-08-01 1999-02-16 Remington Arms Co., Inc. Gas operated firearm piston/piston seal assembly
US20050257681A1 (en) * 2003-10-31 2005-11-24 Keeney Michael D Action rate control system
US20060065112A1 (en) * 2004-09-17 2006-03-30 Grzegorz Kuczynko Firearm having an indirect gas operating system
US20070033851A1 (en) * 2004-06-16 2007-02-15 Paul Hochstrate Automatic or semi-automatic rifle
US20100236396A1 (en) * 2009-03-20 2010-09-23 Stone Jeffrey W Clamped gas block for barrel
US20100282065A1 (en) * 2007-08-29 2010-11-11 Ra Brands, L.L.C. Gas system for firearms
US20100319528A1 (en) * 2009-06-22 2010-12-23 Kenney Daniel E Gas plug retention and removal device
US8065949B1 (en) 2006-05-24 2011-11-29 Remington Arms Company, Inc. Gas-operated firearm
US8176837B1 (en) 2009-10-11 2012-05-15 Jason Stewart Jackson Firearm operating rod
USD661364S1 (en) 2010-06-21 2012-06-05 Ra Brands, L.L.C. Gas block
US8250964B2 (en) 2007-08-29 2012-08-28 Ra Brands, L.L.C. Gas system for firearms
US8453364B2 (en) 2006-10-06 2013-06-04 Colt Defense Llc Firearm having a removable hand guard
US8528458B2 (en) 2011-07-27 2013-09-10 Bernard T. Windauer Pressure-regulating gas block
US8640598B1 (en) 2010-07-19 2014-02-04 Jason Stewart Jackson Sleeve piston for actuating a firearm bolt carrier
US9261314B1 (en) 2010-07-19 2016-02-16 Jason Stewart Jackson Sleeve piston for actuating a firearm bolt carrier
US9347719B1 (en) 2014-01-13 2016-05-24 Ra Brands, L.L.C. Replaceable feed ramp
US9719739B2 (en) 2014-02-06 2017-08-01 Bernard (Bernie) T. Windauer Gas block balancing piston for auto-loading firearm

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19615181C2 (de) * 1996-04-17 2001-02-01 Heckler & Koch Gmbh Gasdruckladendes Selbstladegewehr

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3200710A (en) * 1963-12-27 1965-08-17 Remington Arms Co Inc Gas operating mechanism for autoloading firearm
US3657960A (en) * 1970-06-12 1972-04-25 Olin Corp Self aligning gas system for firearm

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3200710A (en) * 1963-12-27 1965-08-17 Remington Arms Co Inc Gas operating mechanism for autoloading firearm
US3657960A (en) * 1970-06-12 1972-04-25 Olin Corp Self aligning gas system for firearm

Cited By (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3945296A (en) * 1973-03-12 1976-03-23 Valmet Oy Gas piston in a firearm
US3996837A (en) * 1975-05-08 1976-12-14 General Electric Company Seal
US4085654A (en) * 1975-09-29 1978-04-25 Luigi Franchi S.P.A. Gas-operated device for activating the reloading mechanism of a gas-operated automatic rifle
US4109558A (en) * 1975-11-21 1978-08-29 Luigi Franchi S.P.A. Semi-automatic gun
US5872323A (en) * 1997-08-01 1999-02-16 Remington Arms Co., Inc. Gas operated firearm piston/piston seal assembly
US20050257681A1 (en) * 2003-10-31 2005-11-24 Keeney Michael D Action rate control system
US7775149B2 (en) 2003-10-31 2010-08-17 Ra Brands, L.L.C. Action rate control system
US8640372B2 (en) 2004-06-16 2014-02-04 Colt Defense, Llc Automatic or semi-automatic rifle
US20070033851A1 (en) * 2004-06-16 2007-02-15 Paul Hochstrate Automatic or semi-automatic rifle
US8051595B2 (en) 2004-06-16 2011-11-08 Colt Defense, Llc Automatic or semi-automatic rifle
US9612072B2 (en) 2004-06-16 2017-04-04 Colt's Manufacturing Ip Holding Company Llc Automatic or semi-automatic rifle
US9279632B2 (en) 2004-06-16 2016-03-08 Colt's Manufacturing Ip Holding Company Llc Automatic or semi-automatic rifle
US7610844B2 (en) 2004-09-17 2009-11-03 Colt Defense Llc Firearm having an indirect gas operating system
US8943948B2 (en) 2004-09-17 2015-02-03 Colt's Manufacturing Company Llc Firearm having an indirect gas operating system
US20060065112A1 (en) * 2004-09-17 2006-03-30 Grzegorz Kuczynko Firearm having an indirect gas operating system
US8443712B2 (en) * 2006-05-24 2013-05-21 Ra Brands, L.L.C. Gas-operated firearm
US8065949B1 (en) 2006-05-24 2011-11-29 Remington Arms Company, Inc. Gas-operated firearm
US20120017755A1 (en) * 2006-05-24 2012-01-26 Remington Arms Company, LLC Gas-Operated Firearm
US8919025B2 (en) 2006-10-06 2014-12-30 Colt's Manufacturing Company Llc Firearm having a removable hand guard
US8453364B2 (en) 2006-10-06 2013-06-04 Colt Defense Llc Firearm having a removable hand guard
US9228799B2 (en) 2006-10-06 2016-01-05 Colt's Manufacturing Company Llc Firearm having a removable hand guard
US7946214B2 (en) 2007-08-29 2011-05-24 Ra Brands, L.L.C. Gas system for firearms
US20100282065A1 (en) * 2007-08-29 2010-11-11 Ra Brands, L.L.C. Gas system for firearms
US8250964B2 (en) 2007-08-29 2012-08-28 Ra Brands, L.L.C. Gas system for firearms
US20100236396A1 (en) * 2009-03-20 2010-09-23 Stone Jeffrey W Clamped gas block for barrel
US8109194B2 (en) 2009-03-20 2012-02-07 Ra Brands, L.L.C. Clamped gas block for barrel
US8061260B2 (en) 2009-06-22 2011-11-22 Ra Brands, L.L.C. Gas plug retention and removal device
US20100319528A1 (en) * 2009-06-22 2010-12-23 Kenney Daniel E Gas plug retention and removal device
US8176837B1 (en) 2009-10-11 2012-05-15 Jason Stewart Jackson Firearm operating rod
USD661364S1 (en) 2010-06-21 2012-06-05 Ra Brands, L.L.C. Gas block
US9261314B1 (en) 2010-07-19 2016-02-16 Jason Stewart Jackson Sleeve piston for actuating a firearm bolt carrier
US8640598B1 (en) 2010-07-19 2014-02-04 Jason Stewart Jackson Sleeve piston for actuating a firearm bolt carrier
US8528458B2 (en) 2011-07-27 2013-09-10 Bernard T. Windauer Pressure-regulating gas block
US9347719B1 (en) 2014-01-13 2016-05-24 Ra Brands, L.L.C. Replaceable feed ramp
US9562730B2 (en) 2014-01-13 2017-02-07 Ra Brands, L.L.C. Replaceable feed ramp
US9719739B2 (en) 2014-02-06 2017-08-01 Bernard (Bernie) T. Windauer Gas block balancing piston for auto-loading firearm

Also Published As

Publication number Publication date
FR2192696A5 (enrdf_load_stackoverflow) 1974-02-08
JPS5219719B2 (enrdf_load_stackoverflow) 1977-05-30
IT965456B (it) 1974-01-31
ES182287Y (es) 1974-04-01
JPS4936200A (enrdf_load_stackoverflow) 1974-04-03
DE2255287B2 (de) 1975-01-30
GB1404176A (en) 1975-08-28
DE2255287A1 (de) 1974-01-24
ES182287U (es) 1973-05-16
DE2255287C3 (de) 1975-09-11

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