US3359860A - Gas operated automatic firearm having a barrel with a gas conducting insert - Google Patents

Gas operated automatic firearm having a barrel with a gas conducting insert Download PDF

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Publication number
US3359860A
US3359860A US508229A US50822965A US3359860A US 3359860 A US3359860 A US 3359860A US 508229 A US508229 A US 508229A US 50822965 A US50822965 A US 50822965A US 3359860 A US3359860 A US 3359860A
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US
United States
Prior art keywords
gas
barrel
insert
bore
gas inlet
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
US508229A
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English (en)
Inventor
Muhlemann Ernst
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.)
OC Oerlikon Corp AG Pfaeffikon
Original Assignee
Oerlikon Buehrle Holding AG
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Filing date
Publication date
Application filed by Oerlikon Buehrle Holding AG filed Critical Oerlikon Buehrle Holding AG
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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

  • An automatic firearm with an exchangeable barrel has an insert arranged in a groove extending along the longitudinal direction of the barrel having a gas inlet bore connecting the gas bore of the barrel with the gas inlet of the receiver of the firearm.
  • This insert may be arranged in a groove between two cooling fins on a barrel provided with cooling fins.
  • the invention relates to an automatic firearm in which there is a gas-bleed passage within the external diameter of the exchangeable barrel.
  • the gas-bleed passage is formed by an open groove covered by a sleeve over the gun barrel so as to give an enclosed passage.
  • a drawback of this type of construction is that the sleeve increases the effective external diameter of the gun barrel, which leads to difficulties if the Weapon is mounted so as to fire through a loophole in an armoured shield, in that the loophole in the armour-plate has to be made larger.
  • a further disadvantage is that in order to achieve a gas-tight passage the sleeve has to be a very accurate fit over the barrel for the entire length of the groove, which leads to high production costs.
  • the object of the present invention is to avoid these drawbacks, and the invention is characterized in that the gas-bleed passage is formed by a bore in an insert piece placed in a groove cut in the barrel.
  • This type of construction requires precision machining so as to ensure obturation only over very limited areas where the insert joins the previous and following sections of the gaspassage.
  • FIGURE 1 is a partial longitudinal section of an automatic weapon fitted with an insert piece in accordance with a first embodiment of the invention taken along the line I-I of FIGURE 2;
  • FIGURE 2 is a plan view of the embodiment of the invention illustrated in FIGURE 1;
  • FIGURE 3 is a cross-section along the line III-III of FIGURE 1;
  • FIGURE 4 is a partial longitudinal section through the barrel of an automatic weapon fitted with an insert piece in accordance with a second embodiment of the invention, along the line IVIV of FIGURE 5;
  • FIGURE 5 is a plan view of the embodiment of the invention illustrated in FIGURE 4.
  • FIGURE 6 is a cross-section along the line VIVI of FIGURE 4.
  • FIGURE 7 is a cross-section along the line VII-VII of FIGURE 4.
  • the gun barrel 10 is inserted in the receiver 11 and is held in place by the bayonet joint 12.
  • a pin 13 inserted into the action sleeve 11 engages with the bayonet joint 12 in such a manner as to form a stop for the barrel 10, determining the latters angular position with respect to the receiver 11.
  • the receiver 11 is provided with a housing portion 14 into which the insert 15 is screwed, The housing portion 14 and insert 15 together form a cylindrical space 16 in which the gas-piston 17 can slide. This latter transmits its motion by means of a rod 18 to the mechanism responsible for unlocking the breech of the weapon after a shot has been fired in a manner which is Well known and will not therefore be described in detail here.
  • a groove 20 is cut in the upper surface of the barrel 10 so that the plane of symmetry of its flat bottom is coplanar with the axis of the barrel 10.
  • This groove 20 contains an insert piece 21 which is penetrated longitudinally by a bore 211 closed gas-tight at each end by plugs 22.
  • the front end of this bore communicates with a bore 24 which is perpendicular to the axis of the barrel and passes through both the Wall 101 of the gun barrel and the wall 212 of the insert piece so as to connect the longitudinal bore 211 with the gas port 23.
  • the insert piece 21 has two facing surfaces 26 on its bottom side. As is shown in FIGURE 3, at the positions marked 27 the insert piece 21 has chamfered edges. It is fixed in its groove 20 by peening over material from the barrel 10 into the spaces left by the chamfers 27, an operation which may, for example, be carried out by rolling or in a press. This operation also presses the front facing surface 26 of the insert piece 21 against the floor of the groove to form a gas-tight seal.
  • the gun barrel 10 carries longitudinal ribs 30 along part of its length, which taper oil? in section outwards and serve for cooling purposes. Between each pair of ribs is a groove whose floor forms part of a cylindrical surface 102 which is coaxial with the bore of the barrel.
  • One of these grooves extends rearwards into the cylindrical portion 103 of the barrel 10.
  • This extension numbered 32 in the drawings, is narrower than the groove 31 proper, and its radially outermost portion is bounded by parallel walls 311,
  • the groove 31 has a narrow portion 33 of similar shape in the region of the gas port 23.
  • the fiat bottoms 321 of both these narrow sections of the groove are at a distance from the barrel axis either equal to or greater than the radius of the convexly curved bottom 102 of the remainder of the groove.
  • the insert piece 34 is fixed in the groove 31 in such a way that its outer surface lies within the cylindrical space defined by the outer edges of the ribs 30.
  • the width of the insert piece 34 corresponds to that of the narrow portions 32 and 33 of the groove.
  • the bottom portion of the insert piece 34 widens out to form dovetail guides 341. These guides 341 engage in corresponding portions 312 of the narrow sections 32 and 33 of the groove, so that both ends of the insert piece are pressed against the flats 341 at the bottom of the groove.
  • the insert piece 34 is perforated by a longitudinal bore 342 which communicates with the interior of the gun barrel through a bore 35 running from the gas port 23 and passing through both the wall 101 of the barrel and the wall 343 of the insert piece.
  • Another bore 36 also at an angle to the barrel axis, communicates with the longitudinal bore 342 at the rear end of the insert piece and connects it to the bores 152 and 153 in the insert 15 in the action sleeve 11 of the Weapon, which is not shown in the drawings illustrating this second embodiment of the invention.
  • the insert piece is prevented from shifting longitudinally by a pin 37 running transversely to the axis of the barrel and anchored in the same.
  • An automatic firearm regulated by gas pressure comprising a barrel having a gas inlet and an exterior surface, an exposed groove extending in the longitudinal direction of said barrel in the exterior surface of said barrel, a longitudinal insert piece having its two ends located completely in said groove and held therein by said ends, said insert having a gas conduit therein with a gas inlet and gas outlet spaced from one another in the direction of said barrel, a breech casing having a sealing surface wherein said barrel is replaceably mounted by said insert piece, a gas cylinder in said breech casing having a piston displaceable by the gas pressure, a gas inlet bore in said breech casing extending to said gas cylinder, said gas inlet bore terminating at said sealing surface, a further sealing surface on said insert piece contacting said sealing surface on said breech casing, said gas conduit within said insert piece connecting said gas inlet bore of said breech casing with said gas outlet of said insert and through said conduit to said gas inlet of said insert to said gas inlet of said barrel.
  • An automatic firearm regulated by gas pressure comprising a receiver and a barrel, said receiver having a bore extending along a longitudinal axis and terminating in an interior end face also extending along said axis and having a gas inlet opening terminating in said end face, sealing means radially movable in said inlet opening, said barrel fitting into said bore and being secured exchangeably to said receiver, said barrel further having a gas bore arranged spaced along the barrel axis from said gas inlet opening, said barrel having a groove in its exterior surface extending axially of the barrel, a longitudinal insert in said groove, having its two ends secured in said groove, one of said two ends being provided with a sealing surface, the latter being adjacent to said end face and cooperating with said sealing means, a bore within said insert communicating with said gas bore and terminating in said sealing surface.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Toys (AREA)
  • Pressure Vessels And Lids Thereof (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
US508229A 1964-11-19 1965-11-17 Gas operated automatic firearm having a barrel with a gas conducting insert Expired - Lifetime US3359860A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1491864A CH426558A (de) 1964-11-19 1964-11-19 Selbsttätige Feuerwaffe

Publications (1)

Publication Number Publication Date
US3359860A true US3359860A (en) 1967-12-26

Family

ID=4404840

Family Applications (1)

Application Number Title Priority Date Filing Date
US508229A Expired - Lifetime US3359860A (en) 1964-11-19 1965-11-17 Gas operated automatic firearm having a barrel with a gas conducting insert

Country Status (8)

Country Link
US (1) US3359860A (enrdf_load_stackoverflow)
AT (1) AT261446B (enrdf_load_stackoverflow)
BE (1) BE672139A (enrdf_load_stackoverflow)
CH (1) CH426558A (enrdf_load_stackoverflow)
DE (1) DE1453934A1 (enrdf_load_stackoverflow)
FR (1) FR1454348A (enrdf_load_stackoverflow)
GB (1) GB1124748A (enrdf_load_stackoverflow)
SE (1) SE320912B (enrdf_load_stackoverflow)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040244257A1 (en) * 2003-06-04 2004-12-09 Degerness Michael K. Composite structural member
US6868770B2 (en) * 2003-05-31 2005-03-22 Boje Cornils Autoloading gas port structure
US20090007478A1 (en) * 2005-09-13 2009-01-08 Norbert Fluhr Gas cylinder components for use with firearms
US20100186582A1 (en) * 2009-01-26 2010-07-29 Magpul Industries Corp. Gas System for an Automatic Firearm
US20110179945A1 (en) * 2010-01-26 2011-07-28 Robert Bernard Iredale Clark Gas Operating Systems, Subsystems, Components and Processes
US8528458B2 (en) 2011-07-27 2013-09-10 Bernard T. Windauer Pressure-regulating gas block
WO2016114920A3 (en) * 2015-01-13 2016-09-29 Machinegunarmory, Llc Barrel with integrated gas channel
US9719739B2 (en) 2014-02-06 2017-08-01 Bernard (Bernie) T. Windauer Gas block balancing piston for auto-loading firearm
US9766026B2 (en) * 2013-10-21 2017-09-19 Sig Sauer, Inc. Gas operating system for an automatic pistol-caliber firearm
US12352518B2 (en) 2023-01-18 2025-07-08 Krl Holding Company, Inc. Gas operating system for low energy ammunition
US12366425B1 (en) * 2018-12-12 2025-07-22 Cgs Group, Llc Muzzle-mounted devices

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH669839A5 (enrdf_load_stackoverflow) * 1986-03-20 1989-04-14 Oerlikon Buehrle Ag
BG100810A (en) * 1996-08-29 1998-03-31 Георги БАКАЛОВ Breech system of an automatic raiding carbine

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US196749A (en) * 1877-11-06 Improvement in double-barreled guns
US1195693A (en) * 1916-08-22 Isaac newton lewis
US2389631A (en) * 1941-09-06 1945-11-27 Wiley T Moore Automatic and semiautomatic carbine
US2771819A (en) * 1953-10-12 1956-11-27 Remington Arms Co Inc Gas-operating firearm
US2818785A (en) * 1953-07-27 1958-01-07 Brevets Aero Mecaniques Improvements in automatic guns having a detachable barrel

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US196749A (en) * 1877-11-06 Improvement in double-barreled guns
US1195693A (en) * 1916-08-22 Isaac newton lewis
US2389631A (en) * 1941-09-06 1945-11-27 Wiley T Moore Automatic and semiautomatic carbine
US2818785A (en) * 1953-07-27 1958-01-07 Brevets Aero Mecaniques Improvements in automatic guns having a detachable barrel
US2771819A (en) * 1953-10-12 1956-11-27 Remington Arms Co Inc Gas-operating firearm

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6868770B2 (en) * 2003-05-31 2005-03-22 Boje Cornils Autoloading gas port structure
US6889464B2 (en) * 2003-06-04 2005-05-10 Michael K. Degerness Composite structural member
US20040244257A1 (en) * 2003-06-04 2004-12-09 Degerness Michael K. Composite structural member
US20090007478A1 (en) * 2005-09-13 2009-01-08 Norbert Fluhr Gas cylinder components for use with firearms
US7637199B2 (en) * 2005-09-13 2009-12-29 Heckler & Koch Gmbh Gas cylinder components for use with firearms
US8201489B2 (en) * 2009-01-26 2012-06-19 Magpul Industries Corp. Gas system for an automatic firearm
US20100186582A1 (en) * 2009-01-26 2010-07-29 Magpul Industries Corp. Gas System for an Automatic Firearm
US8443711B2 (en) 2010-01-26 2013-05-21 Leitner-Wise Defense, Inc. Gas operating systems, subsystems, components and processes
US20110179945A1 (en) * 2010-01-26 2011-07-28 Robert Bernard Iredale Clark Gas Operating Systems, Subsystems, Components and Processes
US8997622B2 (en) 2010-01-26 2015-04-07 Leitner-Wise Defense, Inc. Gas operating systems, subsystems, components and processes
US8528458B2 (en) 2011-07-27 2013-09-10 Bernard T. Windauer Pressure-regulating gas block
US9766026B2 (en) * 2013-10-21 2017-09-19 Sig Sauer, Inc. Gas operating system for an automatic pistol-caliber firearm
US9719739B2 (en) 2014-02-06 2017-08-01 Bernard (Bernie) T. Windauer Gas block balancing piston for auto-loading firearm
WO2016114920A3 (en) * 2015-01-13 2016-09-29 Machinegunarmory, Llc Barrel with integrated gas channel
US9863733B2 (en) 2015-01-13 2018-01-09 Machine Gun Armory, L.L.C. Barrel with integrated gas channel
US12366425B1 (en) * 2018-12-12 2025-07-22 Cgs Group, Llc Muzzle-mounted devices
US12352518B2 (en) 2023-01-18 2025-07-08 Krl Holding Company, Inc. Gas operating system for low energy ammunition

Also Published As

Publication number Publication date
SE320912B (enrdf_load_stackoverflow) 1970-02-16
GB1124748A (en) 1968-08-21
BE672139A (enrdf_load_stackoverflow) 1966-03-01
DE1453934A1 (de) 1970-01-15
FR1454348A (fr) 1966-07-22
CH426558A (de) 1966-12-15
AT261446B (de) 1968-04-25

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