US3246567A - Operating rod for self-loading firearm - Google Patents

Operating rod for self-loading firearm Download PDF

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Publication number
US3246567A
US3246567A US375256A US37525664A US3246567A US 3246567 A US3246567 A US 3246567A US 375256 A US375256 A US 375256A US 37525664 A US37525664 A US 37525664A US 3246567 A US3246567 A US 3246567A
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United States
Prior art keywords
piston
push rod
cylinder assembly
barrel
self
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
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US375256A
Inventor
Miller Arthur
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Armalite Inc
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Armalite Inc
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Filing date
Publication date
Application filed by Armalite Inc filed Critical Armalite Inc
Priority to US375256A priority Critical patent/US3246567A/en
Priority to GB49325/64A priority patent/GB1055817A/en
Priority to DE19651453904 priority patent/DE1453904A1/en
Priority to FR2765A priority patent/FR1421861A/en
Application granted granted Critical
Publication of US3246567A publication Critical patent/US3246567A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • 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

Definitions

  • This invention relates to an improvement in the conventional gas-actuated push rod system for a self-loading firearm, more particularly, to a push rod system particularly adapted to a lightweight, self-loading firearm of the rapid fire type.
  • the gas is bled from a port in the barrel into a piston and cylinder arrangement.
  • the push rod is of reduced diameter to eliminate weight, it will bend or whip by reason of the rapid action of the firearm and in the conventional system, introduces binding or galling in the piston and cylinder assembly.
  • the binding or galling of the piston and cylinder will cause malfunction or greatly reduce the effectiveness of the system.
  • the push rod can be of greatly reduced diameter from the conventional push rod and designed to bend freely within the elastic limits of the material without impairing the function of the weapon and thus effecting a considerable reduction in the weight of the push rod. This is accomplished by the mounting of the push rod on the piston assembly as hereinafter described.
  • FIG. 1 is a fragmentary view of a rapid self-loading firearm gas-actuated push rod system
  • FIG. 2 is a fragmentary view of the forward end of the barrel of the system, showing the push rod assembly in the operating position;
  • FIGS. 3 and 4 are views of an alternate arrangement of the push rod piston cylinder assembly on a rifle barrel.
  • FIGURE 1 of the drawing shows a rifle barrel 1 secured to a receiver 2.
  • Block 3 represents a portion of the self-loading system which is actuated by push rod 4.
  • Push rod 4 extends into the receiver 2 and moves block 3, as the rifle is fired, for reloading.
  • Piston 7 On the forward end of barrel 1, gas is bled off at port 5 in the barrel and through passage 6.
  • Piston 7 has passage 8 formed therein and it is threaded at 9 into bracket 10 which is rigidly secured to barrel 1.
  • a cylinder 11 surrounds piston 7 and moves rearwardly of the barrel with each firing.
  • the forward end of push rod 4 is formed with a spherical surface engaging a similar spherical surface on cylinder 11.
  • the forward end of push rod 4 and the rearward end of cylinder 11 have inter-engaging means, such as pin 13 loosely fitting in hole 14, to provide freedom of movement of push rod 4 with respect to cylinder 11 at surface 12.
  • Spring 15 biases push rod 4 against cylinder 11 throughout the operation of the system.
  • FIGS. 3 and 4 show the same result with a lightweight push rod, but with the connection of the piston and cylinder reversed.
  • Piston 7' has formed on its rearward end, spherical surface 12 and projection 13.
  • Cylinder 111 is threaded to engage bracket 10. The remainder of the parts function in the manner described in connection with FIGS. 1 and 2.
  • a long, lightweight push rod is thus achieved which will operate reliably over a long period of time and achieve the overall feature of saving in weight in the self-loading system including the unlocking and reloading mechanism.
  • a lightweight push rod system for a self-loading firearm comprising a barrel, a gas port formed therein near the muzzle end of said barrel, a piston and cylinder assembly secured to said barrel, means forming a passage to interconnect said piston and cylinder assembly and said gas port to conduct gas from said barrel to actuate said piston and cylinder assembly, said piston and cylinder assembly formed with a spherical end surface perpendicular to the axis of said assembly, a push rod interconnecting said piston and cylinder assembly and the self-loading mechanism of the firearm, said push rod having the end adjacent said piston and cylinder assembly formed with a mating spherical surface, loosely coupled locator means positioning said spherical end of said push rod on said spherical end of said piston and cylinder assembly and biasing means to hold said spherical surfaces in contact and to permit relative motion of said push rod along said barrel, but out of axial alignment with said piston and cylinder assembly, said locator means comprising an elongated pin on one of said
  • said means forming a passage interconnecting said piston and cylinder assembly and said gas port is a bracket firmly secured to said barrel, said piston and cylinder assembly being mounted on said bracket.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Fluid-Damping Devices (AREA)
  • Actuator (AREA)
  • Toys (AREA)

Description

April 19, 1966 A. MILLER 3,246,567
OPERATING ROD FOR SELF-LOADING FIREARM Filed June 15, 1964 United States Patent 3,246,567 OPERATING ROD FOR SELF-LOADING FIREARM Arthur Miller, Costa Mesa, Calif., assignor to Armaiite, Inc., Costa Mesa, Calif., a corporation of California Filed June 15, 1964, Ser. No. 375,256 Claims. (Cl. 89-191) This invention relates to an improvement in the conventional gas-actuated push rod system for a self-loading firearm, more particularly, to a push rod system particularly adapted to a lightweight, self-loading firearm of the rapid fire type.
In the conventional gas-actuated push rod system for a self-loading firearm, the gas is bled from a port in the barrel into a piston and cylinder arrangement.
It is preferred in the interest of less weight to locate the gas port on the barrel nearer the muzzle where the gas pressure is less and the unlocking and reloading can be effected with less massive mechanism than is required for storing the kinetic energy to effect reloading with a short-coupled gas system. However, a long and relatively rigid push rod is required in such a system. The rigid push rod is attached to the piston cylinder arrangement on one end and the other end is attached to the receiver mechanism in a manner to actuate the selfloading mechanism. It is spring-biased for the return stroke.
If the push rod is of reduced diameter to eliminate weight, it will bend or whip by reason of the rapid action of the firearm and in the conventional system, introduces binding or galling in the piston and cylinder assembly. The binding or galling of the piston and cylinder will cause malfunction or greatly reduce the effectiveness of the system.
In the present invention, the push rod can be of greatly reduced diameter from the conventional push rod and designed to bend freely within the elastic limits of the material without impairing the function of the weapon and thus effecting a considerable reduction in the weight of the push rod. This is accomplished by the mounting of the push rod on the piston assembly as hereinafter described.
It is an object of this invention to provide a lightweight push rod for a gas-actuated push rod system through the reduction of the diameter of the push rod which can bend freely in operation Without impairing the operation of the system or causing malfunction of the system.
It is another object of this invention to provide a mounting for a push rod for gas-actuated push rod system for a self-loading firearm that will bend freely without transmitting the bending of the push rod to the piston cylinder assembly.
Further and other objects of this invention will become apparent from the description of the accompanying drawings in which like numerals refer to like parts.
In the drawings:
FIG. 1 is a fragmentary view of a rapid self-loading firearm gas-actuated push rod system;
FIG. 2 is a fragmentary view of the forward end of the barrel of the system, showing the push rod assembly in the operating position;
FIGS. 3 and 4 are views of an alternate arrangement of the push rod piston cylinder assembly on a rifle barrel.
FIGURE 1 of the drawing shows a rifle barrel 1 secured to a receiver 2. Block 3 represents a portion of the self-loading system which is actuated by push rod 4. Push rod 4 extends into the receiver 2 and moves block 3, as the rifle is fired, for reloading.
On the forward end of barrel 1, gas is bled off at port 5 in the barrel and through passage 6. Piston 7 has passage 8 formed therein and it is threaded at 9 into bracket 10 which is rigidly secured to barrel 1. A cylinder 11 surrounds piston 7 and moves rearwardly of the barrel with each firing.
The forward end of push rod 4 is formed with a spherical surface engaging a similar spherical surface on cylinder 11. The forward end of push rod 4 and the rearward end of cylinder 11 have inter-engaging means, such as pin 13 loosely fitting in hole 14, to provide freedom of movement of push rod 4 with respect to cylinder 11 at surface 12. Spring 15 biases push rod 4 against cylinder 11 throughout the operation of the system.
When the rifle is fired and the bullet passes port 5, a small quantity of gas under high pressure is bled off through passages 6 and 8 and causes cylinder 11 to move rearwardly of the barrel of the rifie. The motion of cylinder 11 is transmitted to push rod 4, and in turn, to bolt unlocking and reloading mechanism represented at 3.
If rapid fire causes push rod 4 to bend or whip, the forward end will merely move with respect to cylinder 11 on spherical surface 12, and no bending or stress will occur between cylinder 11 and piston 7 that will tend to gall and produce malfunction.
As shown in FIG. 2, relative motion of piston 7 and cylinder 11 will be coaxial.
FIGS. 3 and 4 show the same result with a lightweight push rod, but with the connection of the piston and cylinder reversed. Piston 7' has formed on its rearward end, spherical surface 12 and projection 13. Cylinder 111 is threaded to engage bracket 10. The remainder of the parts function in the manner described in connection with FIGS. 1 and 2.
A long, lightweight push rod is thus achieved which will operate reliably over a long period of time and achieve the overall feature of saving in weight in the self-loading system including the unlocking and reloading mechanism.
It is to be undertsood that certain changes, alternations, modifications and substitutions can be made without departing from the spirit and scope of the appended claims.
What is claimed is:
1. A lightweight push rod system for a self-loading firearm comprising a barrel, a gas port formed therein near the muzzle end of said barrel, a piston and cylinder assembly secured to said barrel, means forming a passage to interconnect said piston and cylinder assembly and said gas port to conduct gas from said barrel to actuate said piston and cylinder assembly, said piston and cylinder assembly formed with a spherical end surface perpendicular to the axis of said assembly, a push rod interconnecting said piston and cylinder assembly and the self-loading mechanism of the firearm, said push rod having the end adjacent said piston and cylinder assembly formed with a mating spherical surface, loosely coupled locator means positioning said spherical end of said push rod on said spherical end of said piston and cylinder assembly and biasing means to hold said spherical surfaces in contact and to permit relative motion of said push rod along said barrel, but out of axial alignment with said piston and cylinder assembly, said locator means comprising an elongated pin on one of said spherical surfaces, loosely engaging a longer hole formed in the other of said spherical surfaces.
2. The device as set forth in claim 1, in which said means forming a passage interconnecting said piston and cylinder assembly and said gas port is a bracket firmly secured to said barrel, said piston and cylinder assembly being mounted on said bracket.
.3. The device as set forth in claim 1, in which said bracket is a front sight bracket.
3 4. The device as set forth in claim 1, in which the pis- References Cited by the Examiner ton of said piston and cylinder assembly is mounted on UNITED STATES PATENTS said bracket with the axis thereof extending generally aranel to the axis of said barrel 564,043 7/1896 Benet et al 89-191 X P 5 Th d f h 1 h h 5 1,524,974 2/1925 Hazelton s9 193 e evlce as Set on In C alnl 1 W t 5 3 0 9 97 1 2 Stevens 89-191 cylinder of said piston and cylinder assembly is mounted Y I on said bracket with the axis thereof extending generally BENJAMIN BORCFIELT Exammer' parallel to the axis of said barrel. FRED C. MATTERN, In, Examiner.

Claims (1)

1. A LIGHTWEIGHT PUSH ROD SYSTEM FOR A SELF-LOADING FIREARM COMPRISING A BARREL, A GAS PORT FORMED THEREIN NEAR THE MUZZLE END OF SAID BARREL, A PISTON AND CYLINDER ASSEMBLY SECURED TO SAID BARREL, MEANS FORMING A PASSAGE TO INTERCONNECT SAID PISTON AND CYLINDER ASSEMBLY AND SAID GAS PORT TO CONDUCT GAS FROM SAID BARREL TO ACTUATE SAID PISTON AND CYLINDER ASSEMBLY, SAID PISTON AND CYLINDER ASSEMBLY FORMED WITH A SPHERICAL END SURFACE PERPENDICULAR TO THE AXIS OF SAID ASSEMBLY, A PUSH ROD INTERCONNECTING SAID PISTON AND CYLINDER ASSEMBLY AND THE SELF-LOADING MECHANISM OF THE FIREARM, SAID PUSH ROD HAVING THE END ADJACENT SAID PISTON AND CYLINDER ASSEMBLY FORMED WITH A MATING SPHERICAL SURFACE, LOOSELY COUPLED LOCATOR MEANS POSITIONING SAID SPHERICAL END OF SAID PUSH ROD ON SAID SPHERICAL END OF SAID PISTON AND CYLINDER ASSEMBLY AND BIASING MEANS TO HOLD SAID SPHERICAL SURFACES IN CONTACT AND TO PERMIT RELATIVE MOTION OF SAID PUSH ROD ALONG SAID BARREL, BUT OUT OF AXIAL ALIGNMENT WITH SAID PISTON AND CYLINDER ASSEMBLY, SAID LOCATOR MEANS COMPRISING AN ELONGATED PIN ON ONE OF SAID SPHERICAL SURFACES, LOOSELY ENGAGING A LONGER HOLE FORMED IN THE OTHER OF SAID SPHERICAL SURFACES.
US375256A 1964-06-15 1964-06-15 Operating rod for self-loading firearm Expired - Lifetime US3246567A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US375256A US3246567A (en) 1964-06-15 1964-06-15 Operating rod for self-loading firearm
GB49325/64A GB1055817A (en) 1964-06-15 1964-12-04 Improvements in or relating to firearms
DE19651453904 DE1453904A1 (en) 1964-06-15 1965-01-20 Actuating bar for self-loading firearms
FR2765A FR1421861A (en) 1964-06-15 1965-01-21 Throttle rod for self-loading firearm

Applications Claiming Priority (1)

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US375256A US3246567A (en) 1964-06-15 1964-06-15 Operating rod for self-loading firearm

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Cited By (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3568564A (en) * 1968-09-30 1971-03-09 Olin Corp Shotgun short stroke gas system
US3596555A (en) * 1969-05-05 1971-08-03 Trw Inc Firing chamber seal
US3707110A (en) * 1970-03-10 1972-12-26 Remington Arms Co Inc Accelerating gas system for gas-operated firearms
US4207798A (en) * 1976-11-16 1980-06-17 Kabushiki Kaisha Kawaguchiya Hayashi Juho Kayaku-Ten Gas operating system for loading shot shell in an automatic gun
US4765224A (en) * 1986-08-15 1988-08-23 Morris Michael C Automatic rifle gas system
US4977815A (en) * 1989-05-05 1990-12-18 Stephens Mark L Self cleaning automatic machine pistol and silencer for the same
US5831202A (en) * 1997-03-21 1998-11-03 Rustick; Joseph M. Muzzle attachment for barrel of gas-operated weapon
US20030126781A1 (en) * 2000-12-11 2003-07-10 Herring Geoffrey A. Apparatus and method for actuating a bolt carrier group of a receiver assembly
US6848351B1 (en) * 2002-05-07 2005-02-01 Robert B. Davies Rifle
US20060278205A1 (en) * 2005-06-03 2006-12-14 Fredrik Axelsson Automatic gas powered gun
US7469624B1 (en) 2007-11-12 2008-12-30 Jason Adams Direct drive retrofit for rifles
US20090223357A1 (en) * 2006-01-30 2009-09-10 Herring Geoffrey A Gas piston assembly and bolt carrier for gas-operated firearms
US20100236395A1 (en) * 2006-06-23 2010-09-23 Brian Akhavan Firearm operating mechanisms and methods
US20100269682A1 (en) * 2009-03-24 2010-10-28 Sturm, Ruger & Company, Inc. Bolt carrier for gas operated rifle
US20110179945A1 (en) * 2010-01-26 2011-07-28 Robert Bernard Iredale Clark Gas Operating Systems, Subsystems, Components and Processes
EP1797389A4 (en) * 2004-09-17 2011-11-09 Colt Defense Llc Firearm having an indirect gas operating system
WO2012034711A1 (en) * 2010-09-18 2012-03-22 Michael Klesz Automatic firearm
US20120085226A1 (en) * 2010-10-08 2012-04-12 Bradhart Products, Inc. Gas Piston System Actuator Assembly for Rifle Automatic Ejection and Reload
US8161864B1 (en) 2009-03-24 2012-04-24 Sturm, Ruger & Company, Inc. Firearm gas piston operating system
US20120152104A1 (en) * 2008-09-12 2012-06-21 Colt Defense Llc Firearm having a hybrid indirect gas operating system
EP1984689A4 (en) * 2006-02-09 2012-11-21 Colt Defense Llc Law enforcement carbine with one piece receiver
EP2141437A3 (en) * 2008-07-01 2013-08-07 Adcor Industries, Inc. Firearm having an indirect gas impingement system
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
US9134082B2 (en) 2008-07-01 2015-09-15 Adcor Industries, Inc. Firearm having an indirect gas impingement system
US9188401B2 (en) 2012-04-03 2015-11-17 Jorge Pizano Combined direct drive gas piston system, and frontal, ambidextrous, non reciprocating, charging system for autoloading rifle
US9261314B1 (en) 2010-07-19 2016-02-16 Jason Stewart Jackson Sleeve piston for actuating a firearm bolt carrier
US9612072B2 (en) 2004-06-16 2017-04-04 Colt's Manufacturing Ip Holding Company Llc Automatic or semi-automatic rifle
US9719739B2 (en) 2014-02-06 2017-08-01 Bernard (Bernie) T. Windauer Gas block balancing piston for auto-loading firearm
US20190383572A1 (en) * 2018-06-15 2019-12-19 Michael Gregorich Advanced Gas Piston System
US20220196354A1 (en) * 2020-12-21 2022-06-23 Caracal International, Llc Firearm with gas piston assembly

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3915547A1 (en) * 1989-05-12 1990-11-15 Johann Uhl Gun for using small calibre ammunition - has auxiliary opening to increase recoil force on breech block
DE102005043653A1 (en) 2005-09-13 2007-03-15 Heckler & Koch Gmbh Gas cylinder component and handgun

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US564043A (en) * 1896-07-14 benfit
US1524974A (en) * 1923-07-05 1925-02-03 Hazelton George Gas chamber for automatic guns
US3069976A (en) * 1957-12-06 1962-12-25 Jr Frederick F Stevens Gas-operated semiautomatic pistol

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US564043A (en) * 1896-07-14 benfit
US1524974A (en) * 1923-07-05 1925-02-03 Hazelton George Gas chamber for automatic guns
US3069976A (en) * 1957-12-06 1962-12-25 Jr Frederick F Stevens Gas-operated semiautomatic pistol

Cited By (50)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3568564A (en) * 1968-09-30 1971-03-09 Olin Corp Shotgun short stroke gas system
US3596555A (en) * 1969-05-05 1971-08-03 Trw Inc Firing chamber seal
US3707110A (en) * 1970-03-10 1972-12-26 Remington Arms Co Inc Accelerating gas system for gas-operated firearms
US4207798A (en) * 1976-11-16 1980-06-17 Kabushiki Kaisha Kawaguchiya Hayashi Juho Kayaku-Ten Gas operating system for loading shot shell in an automatic gun
US4765224A (en) * 1986-08-15 1988-08-23 Morris Michael C Automatic rifle gas system
US4977815A (en) * 1989-05-05 1990-12-18 Stephens Mark L Self cleaning automatic machine pistol and silencer for the same
US5831202A (en) * 1997-03-21 1998-11-03 Rustick; Joseph M. Muzzle attachment for barrel of gas-operated weapon
US6722255B2 (en) * 2000-12-11 2004-04-20 Geoffrey A. Herring Apparatus and method for actuating a bolt carrier group of a receiver assembly
US6634274B1 (en) 2000-12-11 2003-10-21 Geoffrey Andrew Herring Firearm upper receiver assembly with ammunition belt feeding capability
US6681677B2 (en) 2000-12-11 2004-01-27 Geoffrey A. Herring Method of reconfiguring a firearm receiver system for receiving magazine-fed ammunition and belt-fed ammunition
US20030126781A1 (en) * 2000-12-11 2003-07-10 Herring Geoffrey A. Apparatus and method for actuating a bolt carrier group of a receiver assembly
US7827722B1 (en) * 2002-05-07 2010-11-09 Davies Robert B Rifle
US6848351B1 (en) * 2002-05-07 2005-02-01 Robert B. Davies Rifle
US9612072B2 (en) 2004-06-16 2017-04-04 Colt's Manufacturing Ip Holding Company Llc Automatic or semi-automatic rifle
EP1797389B1 (en) 2004-09-17 2016-10-26 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
EP1797389A4 (en) * 2004-09-17 2011-11-09 Colt Defense Llc Firearm having an indirect gas operating system
US20060278205A1 (en) * 2005-06-03 2006-12-14 Fredrik Axelsson Automatic gas powered gun
US20090223357A1 (en) * 2006-01-30 2009-09-10 Herring Geoffrey A Gas piston assembly and bolt carrier for gas-operated firearms
US7779743B2 (en) 2006-01-30 2010-08-24 Herring Geoffrey A Gas piston assembly and bolt carrier for gas-operated firearms
US8783160B2 (en) 2006-02-09 2014-07-22 Colt's Manufacturing Company Llc Firearm with gas operating system
EP1984689A4 (en) * 2006-02-09 2012-11-21 Colt Defense Llc Law enforcement carbine with one piece receiver
US8505433B2 (en) 2006-02-09 2013-08-13 Colt Defense, Llc Firearm with gas operating system
US7874240B2 (en) 2006-06-23 2011-01-25 Brian Akhavan Firearm operating mechanisms and methods
US20100236395A1 (en) * 2006-06-23 2010-09-23 Brian Akhavan Firearm operating mechanisms and methods
US20090120277A1 (en) * 2007-11-12 2009-05-14 Jason Adams Direct drive retrofit for rifles
US7469624B1 (en) 2007-11-12 2008-12-30 Jason Adams Direct drive retrofit for rifles
US7739939B2 (en) * 2007-11-12 2010-06-22 Adams Arms, Inc. Direct drive retrofit for rifles
US9134082B2 (en) 2008-07-01 2015-09-15 Adcor Industries, Inc. Firearm having an indirect gas impingement system
EP2141437A3 (en) * 2008-07-01 2013-08-07 Adcor Industries, Inc. Firearm having an indirect gas impingement system
US20120152104A1 (en) * 2008-09-12 2012-06-21 Colt Defense Llc Firearm having a hybrid indirect gas operating system
US9243856B2 (en) * 2008-09-12 2016-01-26 Colt's Manufacturing Company Llc Firearm having a hybrid indirect gas operating system
US10215514B2 (en) * 2008-09-12 2019-02-26 Colt's Manufacturing Ip Holding Company Llc Firearm having a hybrid indirect gas operating system
US8161864B1 (en) 2009-03-24 2012-04-24 Sturm, Ruger & Company, Inc. Firearm gas piston operating system
US20100269682A1 (en) * 2009-03-24 2010-10-28 Sturm, Ruger & Company, Inc. Bolt carrier for gas operated rifle
US8307750B2 (en) 2009-03-24 2012-11-13 Sturm, Ruger & Company, Inc Gas operated rifle with bolt carrier and receiver assembly
US8997622B2 (en) 2010-01-26 2015-04-07 Leitner-Wise Defense, Inc. Gas operating systems, subsystems, components and processes
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
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
WO2012034711A1 (en) * 2010-09-18 2012-03-22 Michael Klesz Automatic firearm
US20120085226A1 (en) * 2010-10-08 2012-04-12 Bradhart Products, Inc. Gas Piston System Actuator Assembly for Rifle Automatic Ejection and Reload
US8528458B2 (en) 2011-07-27 2013-09-10 Bernard T. Windauer Pressure-regulating gas block
US9188401B2 (en) 2012-04-03 2015-11-17 Jorge Pizano Combined direct drive gas piston system, and frontal, ambidextrous, non reciprocating, charging system for autoloading rifle
US9719739B2 (en) 2014-02-06 2017-08-01 Bernard (Bernie) T. Windauer Gas block balancing piston for auto-loading firearm
US20190383572A1 (en) * 2018-06-15 2019-12-19 Michael Gregorich Advanced Gas Piston System
US10852084B2 (en) * 2018-06-15 2020-12-01 Michael Gregorich Advanced gas piston system
US20220196354A1 (en) * 2020-12-21 2022-06-23 Caracal International, Llc Firearm with gas piston assembly
US11846484B2 (en) * 2020-12-21 2023-12-19 Caracal International, Llc Firearm with gas piston assembly

Also Published As

Publication number Publication date
GB1055817A (en) 1967-01-18
DE1453904A1 (en) 1969-09-25

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