US3003400A - Take-down assembly for a firearm with a gas piston - Google Patents

Take-down assembly for a firearm with a gas piston Download PDF

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Publication number
US3003400A
US3003400A US3776A US377660A US3003400A US 3003400 A US3003400 A US 3003400A US 3776 A US3776 A US 3776A US 377660 A US377660 A US 377660A US 3003400 A US3003400 A US 3003400A
Authority
US
United States
Prior art keywords
forearm
firearm
barrel
guide rod
take
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
US3776A
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English (en)
Inventor
James H Johnson
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.)
Olin Corp
Original Assignee
Olin Corp
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
Priority to BE621984D priority Critical patent/BE621984A/xx
Application filed by Olin Corp filed Critical Olin Corp
Priority to US3776A priority patent/US3003400A/en
Priority to GB543/61A priority patent/GB910723A/en
Priority to DEO7823A priority patent/DE1185091B/de
Priority to FR850139A priority patent/FR1278395A/fr
Application granted granted Critical
Publication of US3003400A publication Critical patent/US3003400A/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
    • F41A11/00—Assembly or disassembly features; Modular concepts; Articulated or collapsible guns
    • 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
    • F41C—SMALLARMS, e.g. PISTOLS, RIFLES; ACCESSORIES THEREFOR
    • F41C23/00—Butts; Butt plates; Stocks

Definitions

  • the invention is also related to a novel method for assembling and taking down a firearm.
  • a firearm having a forearm wherein the forearm is rigidly connected to the barrel only at the forward end thereby permitting the after or rear end of the forearm to come and go or seat itself axially as necessary and as conditions of atmosphere and climate affect expansion and contraction of metallic and wooden parts.
  • Another feature of the invention is the provision of a firearm having a simple take-down assembly in which there is a minimum of close tolerance piece parts.
  • a further feature of the invention is the provision of a take-down assembly in a gas operated firearm in which a centrally disposed guide rod is utilized to carry a working piston and track means for the bolt where the track means are formed with connector means for receiving and retaining the rear end of the forearm.
  • a further feature of the invention is the provision of a firearm take-down assembly wherein there is unusual cooperation between the trigger assembly, bolt, working piston, piston cylinder, and the forearm.
  • a firearm including certain principles of the present invention and embracing the special take-down assembly and take-down method may comprise a forearm, a barrel, a receiver having a bore, a trigger assembly secured to the receiver and having a track means for slidably supporting a bolt, a bracket carried by the barrel apertured to define a cylinder and to receive slidably a guide rod, a working piston within the cylinder and carried by the rod having operating means connected to the bolt for actuating the bolt along the track means when the piston is driven, connector means formed integral with the track means and supported by the guide rod for engaging and retaining one end of the forearm, and screw means engaging the bracket and the forearm for rigidly securing the opposite end of the forearm to the barrel.
  • FIG. 1 is an elevational view of a gas operated firearm embracing the principles of the present invention with certain portions broken away for clarity;
  • FIG. 2 is a continuation of the right end of the representation of FIG. 1;
  • FIG. 3 is a vertical section of the drawing of FIG. 1 taken along the zig zag line 3-3;
  • FIG. 4 is a further section of FIG. 1 taken in the plane of the line 4-4;
  • FIG. 5 is a section of FIG. 2 in the plane of the line 5-5, and,
  • FIG. 6 is a perspective view of the track means and the connector means both of which are integral parts of the trigger assembly of FIG. 1.
  • a barrel 10 having a depending bracket 11 formed with a first bore 12 defining a cylinder or a compression chamber.
  • the bore 12 communicates with the interior 5 of the barrel 10 by means of the passageway 13 in well known fashion whereby gas developed in the barrel may flow into the compression chamber to introduce kinetic energy to a piston 14 slidably carried upon a movably mounted guide rod '16.
  • One end of the rod 16 is slid- 10 ably received in a second bore 17 formed in the bracket;
  • the other end is slidably received in a bore 18 formed in a receiver 19.
  • the working piston 14 operates a pair of bolt actuating arms 21-21 connected to the piston at their forward end by means of a U-shaped strap 22 having a central tongue 24.
  • the opposite or rear ends of the operating arms 21-21 engage the bolt wherein a generally saddleshaped bridge element 26 formed integral with the arms is received in a cut out portion 27 of a bolt means 28 as is most apparent in FIG. 1.
  • the trigger assembly indicated generally by the reference numeral 29, includes a track means '31 (FIG. 6) and a connector means 32 comprising a pair of spaced, parallel rails 33-3-3 joined'by a U-shaped bridge 34 and having an upstanding ear 36 apertured at 35 and a pair of forwardly projecting fingers 37-37.
  • the rails 33-33 are connected to a trigger guard 15 by means of a rivet 2 0. 1
  • a forearm which cooperates with the barrel and the receiver to surround and enclose the guide rod 16, the piston and the bolt operating arms 21-21.
  • the rear end of the forearm does not abut the receiver but is free to float, axially, as normal expansion and contraction occurs.
  • the rear end of the forearm is provided with a pair of horizontally disposed, spaced undercut slots 40-40 to receive the fingers 37-37 thereby precluding the after portion of the forearm from dropping downwardly away from the receiver after assembly.
  • the forward end of the forearm is rigidly connected to the firearm through the bracket 11 wherein a screw means characterized by a screw 39 threadedly engages the bracket and passes through an aperture formed in the forearm to fix this end of the forearm rigidly in abutment with the bracket.
  • the bore 18 is partially filled with a coil spring 41 which constantly urges the rod to the right into abutment with the screw 39. In this ar rangement there is no danger that the rod 16 will bottom -and thereforen'nterfere before the screw iiibrings the forward end of the forearm into rigid abutment with the bracket 11.
  • introduction of gas pressure into the pres sure cavity 12 introduces kinetic energy to the working piston 14 operative through the operating arms 21 to drive the bolt rearwardly along the track means or rails 33-33 of the trigger assembly.
  • a return spring 42 operates to return the working piston to its normal position.
  • pin 43 is removed releasing the trigger assembly including the track means 31 and the connector means 32 from the receiver 19.
  • a pin 25 carried by the rails 33-33 provides a pivotal mounting for a hammer (.not shown).
  • the bolt means drops downwardly out of the receiver while the piston assembly including the operating arms 21-21 is moved slightly to the left as viewed in FIG. 2 to Withdraw it from the cylinder and thereafter drops downward freely.
  • a firearm the combination of a forearm, a guide rod, a bolt, 2. barrel, a receiver having a bore, a trigger assembly including track means for slidably supporting the bolt and a connector means for supporting the forearm, a bracket carried by the barrel apertured to receive slidably the guide rod, one end of said rod being received in said bore, a working piston within the bracket carried by said guide rod and having operating means connected to the bolt for actuating the bolt along the track means when the piston is driven, said connector means being formed integral with the track means and supported by the guide rod for engaging and retaining one end of the forearm, and screw means engaging the bracket and the forearm for rigidly securing the opposite end of the forearm to the barrel.
  • a take-down assembly for a gas operated firearm comprising a barrel, a guide rod, a trigger assembly, a
  • a firearm of the class having a guide rod, a barrel, a receiver and a trigger assembly
  • the firearm of claim 4 wherein the trigger assembly includes track means for guiding a bolt and connector means for receiving one end of the forearm telescopically.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Emergency Lowering Means (AREA)
  • Toys (AREA)
US3776A 1960-01-21 1960-01-21 Take-down assembly for a firearm with a gas piston Expired - Lifetime US3003400A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
BE621984D BE621984A (en)) 1960-01-21
US3776A US3003400A (en) 1960-01-21 1960-01-21 Take-down assembly for a firearm with a gas piston
GB543/61A GB910723A (en) 1960-01-21 1961-01-05 Firearm take-down assembly
DEO7823A DE1185091B (de) 1960-01-21 1961-01-18 Gasdrucklader
FR850139A FR1278395A (fr) 1960-01-21 1961-01-19 Dispositif de démontage d'armes à feu

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US3776A US3003400A (en) 1960-01-21 1960-01-21 Take-down assembly for a firearm with a gas piston

Publications (1)

Publication Number Publication Date
US3003400A true US3003400A (en) 1961-10-10

Family

ID=21707543

Family Applications (1)

Application Number Title Priority Date Filing Date
US3776A Expired - Lifetime US3003400A (en) 1960-01-21 1960-01-21 Take-down assembly for a firearm with a gas piston

Country Status (4)

Country Link
US (1) US3003400A (en))
BE (1) BE621984A (en))
DE (1) DE1185091B (en))
GB (1) GB910723A (en))

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3180226A (en) * 1964-02-03 1965-04-27 John L Lochhead Replaceable gas system for firearms
US3849925A (en) * 1972-05-26 1974-11-26 K Mayer Repeater gun, especially rifle
EP0055307A1 (en) * 1980-12-11 1982-07-07 Chartered Industries Of Singapore Private Limited Firearm
US4475438A (en) * 1980-12-11 1984-10-09 Chartered Industries Of Singapore Private Ltd. Gas operated, automatic or semi-automatic guns
US4502367A (en) * 1980-12-11 1985-03-05 Chartered Industries Of Singapore Private Ltd. Firearms bolt carrier assembly
US5123194A (en) * 1990-12-24 1992-06-23 Mason James D Rifle barrel truss mounting
US5228887A (en) * 1989-03-01 1993-07-20 Mayer Karl K Firearm especially hunting rifle with exchangeable barrel, and modular system for such a firearm
US5551179A (en) * 1995-01-06 1996-09-03 Young; Daniel H. Bolt carrier
US20130036900A1 (en) * 2011-08-08 2013-02-14 Stephen Mark Mueller Recoil Apparatus for Firearm
US8800423B1 (en) * 2009-11-03 2014-08-12 Mark Anthony Lammers Semi-automatic rifle
US10012457B2 (en) * 2016-07-14 2018-07-03 The United States Of America, As Represented By The Secretary Of The Navy Take-down compact precision rifle

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2685754A (en) * 1951-09-12 1954-08-10 Remington Arms Co Inc Breech-loading magazine firearm

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2567198A (en) * 1945-09-26 1951-09-11 John C Garand Receiver and bolt mechanism for firearms
US2610426A (en) * 1949-02-16 1952-09-16 Olin Ind Inc Takedown mechanism for firearms

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2685754A (en) * 1951-09-12 1954-08-10 Remington Arms Co Inc Breech-loading magazine firearm

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3180226A (en) * 1964-02-03 1965-04-27 John L Lochhead Replaceable gas system for firearms
US3849925A (en) * 1972-05-26 1974-11-26 K Mayer Repeater gun, especially rifle
EP0055307A1 (en) * 1980-12-11 1982-07-07 Chartered Industries Of Singapore Private Limited Firearm
US4475438A (en) * 1980-12-11 1984-10-09 Chartered Industries Of Singapore Private Ltd. Gas operated, automatic or semi-automatic guns
US4502367A (en) * 1980-12-11 1985-03-05 Chartered Industries Of Singapore Private Ltd. Firearms bolt carrier assembly
US5228887A (en) * 1989-03-01 1993-07-20 Mayer Karl K Firearm especially hunting rifle with exchangeable barrel, and modular system for such a firearm
US5123194A (en) * 1990-12-24 1992-06-23 Mason James D Rifle barrel truss mounting
US5551179A (en) * 1995-01-06 1996-09-03 Young; Daniel H. Bolt carrier
US8800423B1 (en) * 2009-11-03 2014-08-12 Mark Anthony Lammers Semi-automatic rifle
US20130036900A1 (en) * 2011-08-08 2013-02-14 Stephen Mark Mueller Recoil Apparatus for Firearm
US8844425B2 (en) * 2011-08-08 2014-09-30 Elite Tactical Advantage Recoil apparatus for firearm
US10012457B2 (en) * 2016-07-14 2018-07-03 The United States Of America, As Represented By The Secretary Of The Navy Take-down compact precision rifle

Also Published As

Publication number Publication date
GB910723A (en) 1962-11-14
DE1185091B (de) 1965-01-07
BE621984A (en))

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