EP1709384A2 - Ensemble tube de canon et systeme de fixation - Google Patents

Ensemble tube de canon et systeme de fixation

Info

Publication number
EP1709384A2
EP1709384A2 EP05804743A EP05804743A EP1709384A2 EP 1709384 A2 EP1709384 A2 EP 1709384A2 EP 05804743 A EP05804743 A EP 05804743A EP 05804743 A EP05804743 A EP 05804743A EP 1709384 A2 EP1709384 A2 EP 1709384A2
Authority
EP
European Patent Office
Prior art keywords
receiver
barrel
slot
axial bore
fore end
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.)
Withdrawn
Application number
EP05804743A
Other languages
German (de)
English (en)
Inventor
Jeffrey W. Stone
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.)
RA Brands LLC
Original Assignee
RA Brands LLC
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 RA Brands LLC filed Critical RA Brands LLC
Publication of EP1709384A2 publication Critical patent/EP1709384A2/fr
Withdrawn legal-status Critical Current

Links

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
    • F41A21/00—Barrels; Gun tubes; Muzzle attachments; Barrel mounting means
    • F41A21/48—Barrel mounting means, e.g. releasable mountings for replaceable barrels
    • F41A21/487—Barrel mounting means, e.g. releasable mountings for replaceable barrels using friction, e.g. by clamping a barrel surface
    • 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
    • F41A21/00—Barrels; Gun tubes; Muzzle attachments; Barrel mounting means
    • F41A21/48—Barrel mounting means, e.g. releasable mountings for replaceable barrels
    • F41A21/485—Barrel mounting means, e.g. releasable mountings for replaceable barrels using screws or bolts

Definitions

  • the present invention relates generally to firearms, and in particular, to the assembly of a barrel and receiver and a method to set and maintain the head space of a bolt and barrel breach interface.
  • the present invention generally is directed to a receiver and barrel assembly for a firearm, such as a rifle or other long gun or other types of firearms, and a method for assembling and attaching the barrel and receiver and setting the head space between the bolt and the barrel.
  • the firearm readily is assembled at the time of manufacture, and readily disassembled as needed or desired to meet the needs of the individual shooter, without the need for special tooling or equipment.
  • a split receiver for use in the barrel assembly of the present invention comprises a substantially cylindrical body having an aft end and a fore end.
  • the body of the receiver has an axial bore extending therethrough from the aft end to the fore end, and a slot extending from the fore end toward the aft end of the body.
  • the receiver also comprises a set screw or clamping screw aligned radially with the slot.
  • the clamping screw may be positioned to tighten in a direction substantially perpendicular to the slot.
  • the receiver also may include a barrel set screw proximate the fore end of the receiver.
  • the barrel set screw may be positioned to tighten in a direction substantially perpendicular to the axial bore of the receiver.
  • the barrel set screw may have a cone point that marks the barrel upon tightening.
  • a barrel comprising a mating portion dimensioned to be received in the axial bore engages the open fore end of the receiver.
  • the receiver can engage and secure the barrel into the receiver by tightening the clamping screw and the barrel set screw at a desired head space.
  • a taper is formed in the receiver at the fore end, thereby securing the barrel and the receiver.
  • a method of assembling a receiver and barrel includes providing a receiver having an axial bore therethrough and a slot having an open width, inserting a mating portion of a barrel into the axial bore, and tightening a securing means substantially radially aligned with the slot.
  • FIG. 1 is a partially exploded side plan view of an exemplary firearm that may include a receiver and barrel assembly according to the present invention.
  • FIG. 2 is an exploded perspective view of an exemplary receiver and barrel assembly according to the present invention.
  • FIG. 3 is an alternate exploded perspective view of an exemplary receiver and barrel assembly according to the present invention.
  • FIG. 4 is a bottom plan view of an exemplary assembled receiver and barrel according to the present invention.
  • FIG. 5 is a side plan view of an exemplary assembled receiver and barrel according to the present invention.
  • the present invention includes features that improve manufacturability and customization of a firearm.
  • the features simplify manufacturing and permit rapid barrel replacement and head space adjustment without the need for special tooling or equipment.
  • the present invention as described herein typically is used for rimfire rifle barrel attachment systems, but may be used with other long guns or other types of firearms.
  • the barrel assembly 10 of the present invention generally includes a receiver 15 and a barrel 20 used in connection with a firearm, for example, a rifle F, shown in exploded view in FIG. 1.
  • the receiver 15 has a substantially cylindrical body 22 having a first or aft end 25, a second or fore end 30, and an axial bore 35 extending therethrough from the aft end 25 to the fore end 30.
  • the receiver 15 also includes a slot 40 having an open width W extending a length L from the fore end 30 toward the aft end 25 of the body 22.
  • the open width W and length L vary for a given receiver design.
  • the open width W is from about 0.025 in. to about 0.060 in., for example 0.040 in.
  • the slot 40 has a length from about 0.5 in. to about 1.5 in. for example, 1 inch.
  • the receiver also includes a clamping screw 38, set screw, locking pin, or other seeming means proximate the fore end 30 of the receiver 15 for releasably securing the barrel 20 within the receiver 15.
  • the clamping screw 38 is substantially aligned radially with the slot 40 and tightens in a direction substantially perpendicular to the axial bore 35. In one aspect, the clamping screw 38 is aligned in a substantially perpendicular relation to the slot 40.
  • the receiver further includes a barrel set screw 48, typically tightened at the time of manufacture. The barrel set screw 48 is positioned so that it tightens in a radial direction, substantially perpendicular to the axial bore 35.
  • the barrel set screw 48 is a cone point screw, so that upon tightening against the barrel 20, the mating portion 55 of the barrel 20 is marked or scored permanently. The marking then can be used to determine whether the barrel 20 has been tampered with after assembly.
  • the slot 40 is extended to a magazine chamber 70, thereby providing an overall clamping length 1/ (FIG. 4) of from about 2 inches to about 4 inches, for example, about 3 inches. By doing so, the body 22 of the receiver 15 more readily deforms during assembly, thereby requiring less torque to tighten the barrel set screw 48.
  • the receiver 15 also may include a guide pin 45 (best seen in FIG. 4) that extends inward from the exterior of the receiver 15 into the axial bore 35.
  • the guide pin 45 may be mounted flush to the exterior of the receiver 15 and may extend into the bore 35 about 0.05 in. to about 0.10 in., although greater or lesser amounts of extension of the guide pin also can be used as needed or desired.
  • the barrel 20 includes a first end 75 defining a mating portion 55 with a mating shoulder 60 formed thereabout, and a second, distal end 80.
  • the mating portion 55 is dimensioned to be slidably received in the axial bore 35 of the receiver 15.
  • the barrel 20 also may include a guide groove (not shown) or similar directional feature dimensioned to slidably receive the guide pin 45 of the receiver 15. It should be noted that different barrels having different length mating portions also can be provided or used.
  • the mating portion 55 of the barrel 20 is rotated as needed to align the guide groove 65 and the guide pin 45 of the receiver 15.
  • the mating portion 55 then is slidably inserted into the axial bore 35 of the receiver 15.
  • a bolt assembly 85 is inserted into the receiver 15 and closed.
  • the bolt assembly 85 includes a bolt face 90 having a counterbore (not shown) therein.
  • the barrel 20 is slidably adjusted within the axial bore 35 of the receiver 15 along the length thereof until a desired head space is attained. The minimum possible head space is attained by bringing the barrel breach face 105 into contact with the counterbore of the bolt face 90 within the receiver 15.
  • Hard gauging techniques known to those of skill in the art can be used to attain a greater head space if desired.
  • the ability to adjust the head space in this manner provides significant advantages over presently available receiver and barrel assemblies.
  • the receiver and assembly of the present invention readily accommodate normal tolerance variations in the barrel and receiver, thereby simplifying the manufactiu ⁇ ng process. Additionally, secondary machining typically required to provide a proper engagement of the receiver and barrel is not required.
  • FIGs. 4 and 5 when the barrel 20 is positioned relative to the receiver 15 at the desired head space, the clamping screw 38 is tightened. The tightening action causes the open width W of the slot to decrease.
  • the tightening action causes the fore end 30 of the receiver 15 to deform toward and against the mating portion 55 of the barrel 20, thereby forming a taper in the receiver 15.
  • the taper in the receiver decreases the diameter of the receiver 15 at the fore end 30 relative to the original diameter.
  • a required torque may be specified.
  • the required torque on the clamping screw is from about 100 in-lbf to about 125 in-lbf.
  • the resulting taper helps to substantially securely clamp the receiver 15 to the barrel 20 seated therein. Additionally, tightening of the clamping screw 38 maintains the desired head space dimension.
  • the barrel set screw 110 requires a minimum torque setting of at least about 25 in-lbf. Tightening the barrel set screw 110 in this manner may provide from about 500 lb to about 1000 lb of additional force in securing the ban-el 20 in the receiver 15. In contrast to presently known, more complicated assemblies, only two screws or other securing means are needed to secure the receiver to the barrel.
  • the simple, easy to use design of the present invention permits the assembly to be customized according to the preferences of the user. Additionally, the present invention allows a damaged or worn barrel and/or receiver to be replaced with little effort or cost.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Telescopes (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)

Abstract

Un ensemble carcasse et tube de canon est décrit. Le tube de canon s'enlève facilement de la carcasse. Par ailleurs, la feuillure de l'ensemble est facile à régler. Ces caractéristiques permettent une fabrication plus facile et une utilisation adaptée du fusil.
EP05804743A 2004-01-30 2005-01-31 Ensemble tube de canon et systeme de fixation Withdrawn EP1709384A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US54036004P 2004-01-30 2004-01-30
US11/047,019 US20050188591A1 (en) 2004-01-30 2005-01-31 Barrel assembly and attachment system
PCT/US2005/003078 WO2005119160A2 (fr) 2004-01-30 2005-01-31 Ensemble tube de canon et systeme de fixation

Publications (1)

Publication Number Publication Date
EP1709384A2 true EP1709384A2 (fr) 2006-10-11

Family

ID=34889751

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05804743A Withdrawn EP1709384A2 (fr) 2004-01-30 2005-01-31 Ensemble tube de canon et systeme de fixation

Country Status (8)

Country Link
US (1) US20050188591A1 (fr)
EP (1) EP1709384A2 (fr)
JP (1) JP2007519887A (fr)
CA (1) CA2554086A1 (fr)
IL (1) IL176931A0 (fr)
MX (1) MXPA06008592A (fr)
RU (1) RU2006131122A (fr)
WO (1) WO2005119160A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9347719B1 (en) 2014-01-13 2016-05-24 Ra Brands, L.L.C. Replaceable feed ramp

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US7596900B2 (en) * 2003-08-04 2009-10-06 Rmdi, L.L.C. Multi-caliber ambidextrously controllable firearm
US7971379B2 (en) 2004-02-13 2011-07-05 Rmdi, Llc Firearm
US20050229463A1 (en) * 2004-04-14 2005-10-20 Paul Tashjian Firearm assembly
US7131228B2 (en) * 2004-06-16 2006-11-07 Colt Defense Llc Modular firearm
US8051595B2 (en) 2004-06-16 2011-11-08 Colt Defense, Llc Automatic or semi-automatic rifle
US7451564B2 (en) * 2006-02-16 2008-11-18 Full Nelson, Llc Interchangeable barrel system for rifles
US9151553B2 (en) * 2007-01-10 2015-10-06 Smith & Wesson Corp. Bolt action firearm and its method of assembly
US9470472B2 (en) 2007-07-18 2016-10-18 Abrams Airborne Manufacturing Inc. Adaptive configuration for a firearm
US7975417B2 (en) * 2009-01-13 2011-07-12 Ronald Duplessis System for joining a barrel to the receiver of a bolt action rifle
US9057576B2 (en) 2009-03-24 2015-06-16 Sturm, Ruger & Company, Inc. Firearm with quick coupling barrel system
US8505227B2 (en) 2009-03-24 2013-08-13 Sturm, Ruger & Company, Inc. Firearm with quick coupling barrel interlock system
US8490312B2 (en) 2009-03-24 2013-07-23 Sturm, Ruger & Company, Inc. Quick coupling barrel system for firearm
US8479429B2 (en) 2009-03-24 2013-07-09 Sturm, Ruger & Company, Inc. Firearm with quick coupling barrel system
US20130219765A1 (en) * 2012-02-28 2013-08-29 Dikar S. Coop. Ltda Firearm with barrel fixed by at least one screw
US8857096B2 (en) * 2012-08-14 2014-10-14 Troy Rhea MCCLINTOCK Forward pistol mount
US8782943B2 (en) 2012-10-26 2014-07-22 Ra Brands, L.L.C. Quick detach barrel mounting system
US8910408B2 (en) * 2012-12-19 2014-12-16 Accuracy International of North America, Inc. Firearm with barrel cinching clamp
US9383154B2 (en) 2013-12-12 2016-07-05 Ra Brands, L.L.C. Gas vent for firearm
US9429379B2 (en) * 2014-02-10 2016-08-30 California Business Environments, Inc. Rimfire rifle
US10352643B2 (en) * 2016-09-21 2019-07-16 Vincent P. Battaglia Quad lock multicaliber rifle receiver with locking barrel
AT519567B1 (de) * 2017-05-04 2018-08-15 Steyr Mannlicher Gmbh Gehäuse für eine Feuerwaffe mit Wechsellauf
US11143478B2 (en) * 2019-04-05 2021-10-12 Sturm, Ruger & Company, Inc Free-floating barrel mounting system for firearm
US11402169B1 (en) 2020-03-31 2022-08-02 Kevin Michael Sohegian Switch barrel rifle with adjustable headspace
KR102141665B1 (ko) * 2020-05-21 2020-08-05 에스앤티모티브 주식회사 총열 조립모듈이 구비된 소화기
US11953281B2 (en) * 2020-08-13 2024-04-09 Lightforce Australia Pty Limited Rifle receiver arrangement and a method of assembly of a rifle barrel to said rifle receiver
WO2023205491A1 (fr) * 2022-04-22 2023-10-26 Savage Arms, Inc. Arme à feu démontable à percussion annulaire
US12111127B1 (en) 2023-04-10 2024-10-08 Kimber Ip, Llc Barrel attachment system for rifle
US12504245B1 (en) * 2025-08-07 2025-12-23 Ares Defense Systems, Inc. Firearm receiver systems offering a fixed-barrel arrangement and pressure relief capability

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Also Published As

Publication number Publication date
US20050188591A1 (en) 2005-09-01
WO2005119160A3 (fr) 2006-04-27
RU2006131122A (ru) 2008-03-10
JP2007519887A (ja) 2007-07-19
CA2554086A1 (fr) 2005-12-15
IL176931A0 (en) 2006-12-10
MXPA06008592A (es) 2006-08-28
WO2005119160A2 (fr) 2005-12-15

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