US3690219A - Gas-operated automatic firearm having thermal firing rate control - Google Patents

Gas-operated automatic firearm having thermal firing rate control Download PDF

Info

Publication number
US3690219A
US3690219A US50144A US3690219DA US3690219A US 3690219 A US3690219 A US 3690219A US 50144 A US50144 A US 50144A US 3690219D A US3690219D A US 3690219DA US 3690219 A US3690219 A US 3690219A
Authority
US
United States
Prior art keywords
piston
chamber
gas
insert
grooves
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
US50144A
Other languages
English (en)
Inventor
Ernst Muhlemann
Jean Eskild
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 Air Defence AG
Original Assignee
Werkzeugmaschinenfabrik Oerlikon Buhrle AG
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 Werkzeugmaschinenfabrik Oerlikon Buhrle AG filed Critical Werkzeugmaschinenfabrik Oerlikon Buhrle AG
Application granted granted Critical
Publication of US3690219A publication Critical patent/US3690219A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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

  • the invention relates to a gas-operated automatic firearm comprising a barrel having with a gas-passage communicating with a cylindrical chamber containing a piston and an insert defining one end of the chamber and also allowing gas to pass from said gas passage to the interior of the chamber.
  • the insert forms a plug which tightly seals the cylinder and which is formed with an internal projection that in conjunction with the internal wall of the cylinder defines an annular channel for the passage of the gases therethrough. Between the plug and this projection is an annular groove into which the gas passage discharges the gas.
  • the annular groove communicates with the cylinder chamber in front of the piston not only through the annular passage but also through bores that obliquely traverse the projection.
  • the gas passage is located far to the rear in the barrel and thus enters the cylinder near the piston.
  • this location of the gas passage is essential.
  • a thermal rate control is provided which operates by constricting the annular gas passage when the temperature of the firearm rises.
  • this control is very sluggish in action. It does not become effective until after prolonged continuous fire when the firing rate has already appreciably risen.
  • the present invention aims to overcome these drawbacks. Despite the location of a gas passage far to the rear in the barrel the arrangement of the invention permits the length of the gas path to be greatly extended and thus a rise in the firing rate to be avoided.
  • a gas operated firearm comprises a gas operated automatic firearm comprising a barrel having a gas passage communicating with a cylindrical chamber containing a piston and an insert defining one end of said chamber and allowing gas to pass from said passage into said chamber at the end nearest the piston, in which the path for the gas extends first towards the end of the insert remote from the piston and then returns to the end of the insert nearest the piston.
  • FIG. 1 is a section of a gas operated automatic firearm according to a first embodiment of the invention
  • FIG. 2 is a section on the line [1-11 of FIG. 1;
  • FIG. 3 is a similar view as FIG. I of a second embodiment of a gas operated automatic firearm according to the invention.
  • the automatic firearm comprises a barrel 1 and a breech casing 2.
  • breech casing 2 includes a cylindrical chamber 3 which piston 6 illustrated in FIG. 1 the head of the piston is in contact with an end face 10 of an extension of the plug 5. Inside the chamber 3 is a stack of dish springs 11 which serve as a buffer for the piston 6 and cooperate with an annular face 12 at the end of the piston 6, adjacent the piston rod 7. A hole 13 provides communication between the chamber 3 and the atmosphere.
  • the plug 5 has an extension towards the piston 6 forming the insert 14 which in diameter corresponds to the internal diameter of the chamber 3.
  • the insert 14 contains two peripheral grooves 15 and a helical groove 16 milled into its circumference.
  • the groove 16 connects the two peripheral grooves 15.
  • the gas passage 4 from the interior of the barrel I communicates with the peripheral groove nearest the piston 6.
  • the insert 14 is further provided with an axial blind bore 17 which extends to the end face 10, the final portion being in the divergent cone.
  • the front end peripheral groove 15 communicates with the central axial bore 17 through four angularly equidistantly disposed channels 18 normal to the longitudinal axis of the helical groove 16, which coinsides with the axis of the plug 5.
  • the cross section of the grooves l5, 16 need not necessarily be a trapezium as shown in FIG. 1. It might also be semicircular, rectangular or square.
  • the illustrated firearm operates as follows:
  • the insert 14 which forms an extension of the plug 5 has a diameter smaller than that of the interior of the chamber 3 along most of the length.
  • Peripheral grooves 19 are milled at regular axial intervals in the surface of the insert 14 along its entire length. Gas from the passage 4 discharges into the rearmost peripheral groove 19 nearest the head of the piston 6.
  • the front end peripheral groove 19 communicates with a central blind bore 17 through radial channels 18.
  • the insert 14 has an annular flange 20 equal in diameter to that of the chamber 3 at its rear end which thus seals the insert from the chamber 3.
  • This modified insert 14 does not affect the manner in which the firearm functions, which remains as has been described with reference to FIGS. 1 and 2.
  • the presence of the insert 14 substantially lengthens the gas path from the gas passage 4 to the piston 6, since the gas is forced by the insert first to travel away from the piston and then to return.
  • the gases are conducted rearwards through the helical groove 16.
  • the gas stream then divides between the four radial channels 18 before recombining in the central blind bore 17 and impinging upon the head of the piston 6.
  • the insert 14 in cooperation with the wall of the cylindrical chamber 3 forms a labyrinth seal through which the gases flow axially along the insert 14, the cross section of flow being alternately constructed and enlarged.
  • the division and recombination of the gases is again effected in the radial channels 18 and in the central blind bore 17.
  • a gas operated automatic firearm comprising a breech casing having a cylindrical chamber, a barrel having a gas passage communicating with said cylindrical chamber, a piston in said chamber, an insert defining one end of said chamber having an annular flange at the end adjacent said piston equal to the internal diameter of said chamber, the external diameter of said insert apart from said annular flange being less than the internal diameter of said chamber, said insert having at equidistant axial intervals annular grooves, means guiding the gas from said gas passage over said annular grooves into said chamber at the end nearest said piston, said gas first flowing towards the end of said insert remote from said piston and then to the end of said insert adjacent said piston.
  • a gas operated automatic firearm comprising a breech casing having a cylindrical chamber, a barrel having a gas passage communicating with said cylindrical chamber, a piston in said chamber, an insert defining one end of said chamber having an annular peripheral groove at either end, said two grooves being connected by a helical peripheral groove, means guiding the gas from said gas passage through the peripheral grooves into said chamber at the end nearest said piston, the gas first flowing towards the end of said insert remote from said piston and then to the end of said insert adjacent said piston.
  • a gas operated firearm in which the end of said insert remote from said piston contains radial. coplanar passages and said insert has a central blind bore extending through the length of said insert and opening into said chamber opposite the face of said piston.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
US50144A 1969-07-01 1970-06-26 Gas-operated automatic firearm having thermal firing rate control Expired - Lifetime US3690219A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1004769A CH511413A (de) 1969-07-01 1969-07-01 Selbsttätige, durch den Gasdruck betätigte Feuerwaffe

Publications (1)

Publication Number Publication Date
US3690219A true US3690219A (en) 1972-09-12

Family

ID=4358737

Family Applications (1)

Application Number Title Priority Date Filing Date
US50144A Expired - Lifetime US3690219A (en) 1969-07-01 1970-06-26 Gas-operated automatic firearm having thermal firing rate control

Country Status (8)

Country Link
US (1) US3690219A (de)
JP (1) JPS4939077B1 (de)
BE (1) BE752039A (de)
CH (1) CH511413A (de)
DE (1) DE2028402A1 (de)
FR (1) FR2051077A5 (de)
GB (1) GB1253479A (de)
NL (1) NL7009417A (de)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3795173A (en) * 1972-01-07 1974-03-05 Oerlikon Buehrle Ag Cascade throttle
US20040144377A1 (en) * 1999-03-19 2004-07-29 Jerry Dobbins Spring assist for launch from compressed gas gun
WO2007079879A1 (de) * 2005-12-23 2007-07-19 Heckler & Koch Gmbh Gasabnahmeanordnung und lauf bzw. waffe mit einer gasabnahmeanordnung
US20100251885A1 (en) * 2007-08-29 2010-10-07 Stone Jeffrey W Gas system for firearms
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
WO2011090446A1 (en) * 2010-01-20 2011-07-28 Bahtiyar Tasyagan Gas piston assembly usable with cartridges having different quantity of filling
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
US8528458B2 (en) 2011-07-27 2013-09-10 Bernard T. Windauer Pressure-regulating gas block
US20140000446A1 (en) * 2012-06-29 2014-01-02 Corby Hall Adjustable Gas Cyclic Regulator for an Autoloading Firearm
US8640598B1 (en) 2010-07-19 2014-02-04 Jason Stewart Jackson Sleeve piston for actuating a firearm bolt carrier
US8863637B2 (en) * 2012-06-29 2014-10-21 Corby Hall Adjustable gas cyclic regulator for an autoloading firearm
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
DE102016015069A1 (de) 2016-12-19 2018-06-21 Rheinmetall Air Defence Ag Gasdrucklader und Verfahren zur Kadenzsteuerung eines Gasdruckladers

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US831923A (en) * 1906-02-21 1906-09-25 Adolf Odkolek Von Augezd Automatic machine-gun.
US2872851A (en) * 1957-05-16 1959-02-10 David L Katz Double expansion ball float gas system for a firearm

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US831923A (en) * 1906-02-21 1906-09-25 Adolf Odkolek Von Augezd Automatic machine-gun.
US2872851A (en) * 1957-05-16 1959-02-10 David L Katz Double expansion ball float gas system for a firearm

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3795173A (en) * 1972-01-07 1974-03-05 Oerlikon Buehrle Ag Cascade throttle
US20040144377A1 (en) * 1999-03-19 2004-07-29 Jerry Dobbins Spring assist for launch from compressed gas gun
WO2007079879A1 (de) * 2005-12-23 2007-07-19 Heckler & Koch Gmbh Gasabnahmeanordnung und lauf bzw. waffe mit einer gasabnahmeanordnung
US20080307954A1 (en) * 2005-12-23 2008-12-18 Norbert Fluhr Gas bleed assemblies for use with firearms
US7621210B2 (en) 2005-12-23 2009-11-24 Heckler & Koch, Gmbh Gas bleed assemblies for use with firearms
AU2006334788B2 (en) * 2005-12-23 2011-02-24 Heckler & Koch Gmbh Gas bleed arrangement and barrel and firearm with a gas bleed arrangement
US20100251885A1 (en) * 2007-08-29 2010-10-07 Stone Jeffrey W Gas system for firearms
US20100282065A1 (en) * 2007-08-29 2010-11-11 Ra Brands, L.L.C. Gas system for firearms
US7946214B2 (en) * 2007-08-29 2011-05-24 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
US20100319528A1 (en) * 2009-06-22 2010-12-23 Kenney Daniel E Gas plug retention and removal device
US8061260B2 (en) 2009-06-22 2011-11-22 Ra Brands, L.L.C. Gas plug retention and removal device
US8176837B1 (en) 2009-10-11 2012-05-15 Jason Stewart Jackson Firearm operating rod
WO2011090446A1 (en) * 2010-01-20 2011-07-28 Bahtiyar Tasyagan Gas piston assembly usable with cartridges having different quantity of filling
USD661364S1 (en) 2010-06-21 2012-06-05 Ra Brands, L.L.C. 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
US8528458B2 (en) 2011-07-27 2013-09-10 Bernard T. Windauer Pressure-regulating gas block
US20140000446A1 (en) * 2012-06-29 2014-01-02 Corby Hall Adjustable Gas Cyclic Regulator for an Autoloading Firearm
US8863637B2 (en) * 2012-06-29 2014-10-21 Corby Hall Adjustable gas cyclic regulator for an autoloading firearm
US9322606B2 (en) * 2012-06-29 2016-04-26 F & D Defense Llc Adjustable gas cyclic regulator for an autoloading firearm
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
CH511413A (de) 1971-08-15
JPS4939077B1 (de) 1974-10-23
NL7009417A (de) 1971-01-05
BE752039A (fr) 1970-12-01
DE2028402A1 (de) 1971-01-14
GB1253479A (en) 1971-11-17
FR2051077A5 (de) 1971-04-02

Similar Documents

Publication Publication Date Title
US3690219A (en) Gas-operated automatic firearm having thermal firing rate control
US4085654A (en) Gas-operated device for activating the reloading mechanism of a gas-operated automatic rifle
US3763739A (en) High rate of flow port for spool valves
US4125054A (en) Mechanism for gas control in an automatic firearm
US3138990A (en) Liquid propellant machine gun
US2206568A (en) Recoil control device
US2398298A (en) Firearm
US3944168A (en) Artillery projectile with spreading tail assembly
US4924751A (en) Gun barrel recoil brake with throttled counterrecoil
US4109558A (en) Semi-automatic gun
US3745880A (en) Hydropneumatic recuperator for pieces of ordnance
US1072350A (en) Differential-recoil gun.
US2866386A (en) Design for guns employing split chamber
GB1299287A (en) A tracer projectile
JPH0746039B2 (ja) シール機構及び液体推進剤を用いた銃
US2119169A (en) Gas-operated gun loading device
GB854516A (en) Improvements in recoilless guns
US3354780A (en) Breech seal for firearms utilizing caseless ammunition
US2339777A (en) Flash hider
US2388396A (en) Firearm
US3270618A (en) Controlled recoil weapon
US3516358A (en) Fin stabilized projectile
GB2189310A (en) A mortar grenade
US3599530A (en) Automatic replenisher for the hydro-pneumatic recoil systems of large caliber guns
US3613500A (en) Combination projectile guide and firing chamber seal