WO2008111988A2 - Dispositif de stabilisation des vibrations d'un canon d'arme à feu - Google Patents

Dispositif de stabilisation des vibrations d'un canon d'arme à feu Download PDF

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Publication number
WO2008111988A2
WO2008111988A2 PCT/US2007/069617 US2007069617W WO2008111988A2 WO 2008111988 A2 WO2008111988 A2 WO 2008111988A2 US 2007069617 W US2007069617 W US 2007069617W WO 2008111988 A2 WO2008111988 A2 WO 2008111988A2
Authority
WO
WIPO (PCT)
Prior art keywords
barrel
post
bolt
stock
firearm
Prior art date
Application number
PCT/US2007/069617
Other languages
English (en)
Other versions
WO2008111988A3 (fr
Inventor
Kent A. Fletcher
Original Assignee
Fletcher Kent A
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 Fletcher Kent A filed Critical Fletcher Kent A
Publication of WO2008111988A2 publication Critical patent/WO2008111988A2/fr
Publication of WO2008111988A3 publication Critical patent/WO2008111988A3/fr

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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41C—SMALLARMS, e.g. PISTOLS, RIFLES; ACCESSORIES THEREFOR
    • F41C27/00—Accessories; Details or attachments not otherwise provided for
    • F41C27/22—Balancing or stabilising arrangements on the gun itself, e.g. balancing weights

Definitions

  • the present invention is a device and system to dampen or control barrel vibrations which occur when a firearm, particularly a rifle, is fired
  • FIG 1 schematically depicts vibrations 12 of a segment of barrel 20
  • the vibrations typically comprise standing waves, with certain locations on the barrel corresponding to maximum amplitudes of the standing waves, and other locations, or nodes, corresponding to minimum standing wave amplitudes
  • the standing wave frequency and maximum amplitude are typically highly dependent on the specific design, dimensions, and materials of the firearm
  • a description of barrel vibrations may be found in U S Patent No 2,372,568, incorporated herein by reference SUMMARY QF THE INVENTION (DISCLOSURE QF THE INVENTION)
  • the present invention is an apparatus for controlling vibrations of a firearm barrel, the apparatus comprising a post comprising an at least partially threaded interior cavity, the post attached to the barrel at a location for controlling vibrations of the barrel, and a threaded bolt screwed into the cavity, the bolt at least partially securing the firearm stock to the barrel
  • the location is preferably approximately
  • the present invention is also a method for controlling vibrations of a firearm barrel, the method comprising the steps of attaching a post comprising an at least partially threaded interior cavity to a firearm barrel at a location suitable for controlling vibrations of the barrel, inserting a bolt through an opening of a firearm stock, and screwing the bolt into the cavity, thereby at least partially securing the stock to the barrel
  • the attaching step preferably comprises welding or hard soldering the post to the barrel
  • the location is preferably approximately a point of maximum vibration of the barrel
  • the method preferably further comprises the step of forming a recess in the barrel for receiving the post
  • the attaching step optionally comprises integrally forming the post during manufacture of the barrel
  • the method preferably further comprises the step of adjusting a tension of the bolt
  • the method preferably further comprises the step of attaching a sling or sling swivel post to the bolt
  • the inserting step preferably comprises inserting the bolt through an escutcheon inserted in the stock
  • An object of the present invention is to dampen vibrations of a firearms barrel during firing
  • An advantage of the present invention is improved firearm accuracy and uniformity from shot to shot
  • Another advantage of the present invention is that for a rifle the device is preferably mounted to the barrel through the rifle's wooden forearm or stock, where the strongest vibrations typically occur
  • FIG 1 is a schematic showing standing wave vibrations of a section of a firearm barrel
  • FIGS 2a-2c show an exploded cross sectional view of a segment of an embodiment of the present invention.
  • FIGS 3a-3e depict multiple methods of fastening the stabilizing post to a section of the firearm barrel
  • the present invention is a device for dampening, stabilizing, or controlling barrel vibrations caused by firing a firearm, particularly but not limited to a rifle
  • the present invention preferably forces the barrel to vibrate approximately the same from shot to shot It also preferably controls vibrational nodes of the barrel so that different weight projectiles having various velocities may be used with more accuracy to a given point of aim
  • Stabilizer post 10 of the present invention is preferably located at a position of maximum vibration of firearm barrel 20 as shown in FIG 1
  • the location providing optimal vibration control may be different for any particular combination of firearm and ammunition and may be determined theoretically, by simulations, or empirically
  • One or more devices may alternatively be located at nodes or other positions along the barrel in order to provide desired results
  • firearm means any weapon through which a projectile such as ammunition is fired, such as a pistol, handgun, rifle, carbine, automatic weapon, shotgun, cannon, tank, and the like
  • the device preferably comprises post 10, which is preferably cylindrical Barrel 20 may optionally comprise recess 30 for receiving post 10 Recess 30 does not protrude into the interior of barrel 20 and may be milled, drilled, or otherwise machined At least a portion of the interior of post 10 is preferably threaded, preferably with 10-32" threads for receiving locking bolt 50
  • Female escutcheon 40 is preferably disposed in the stock so that its bottom surface is flush with the bottom of the stock
  • Female escutcheon 40 may comprise 4140 Chrome-moly or stainless steel to S A A M I specifications, in which case it is preferably inletted or inlayed and spotted into the stock
  • Female escutcheon 40 may alternately be comprised of a hard wood, such as ebony, which is preferably permanently embedded, for example by gluing, in the forearm
  • Female escutcheon 40 could then be drilled, countersunk, and shaped when the stock is being shaped prior to finishing
  • a top view of one embodiment of female escutcheon 40 is shown in FIG 2b
  • the bottom surface of female escutcheon 40 may be flat, or, as shown in FIG 2c, may optionally be milled or otherwise shaped to form convex radius 65, or any other shape to complement the stock shape as desired
  • Locking bolt 50 preferably passes through female escutcheon 40 and screws into the interior threads of post 10, thus securing female escutcheon 40 and the stock (not shown) to post 10 and barrel 20
  • the accuracy of the firearm is adjustable by adjusting the tension of locking bolt 50, which is preferably tightened to approximately 35 ft-lbs of torque Locking bolt 50 is preferably the means of attaching the stock to barrel 20 which is located closest to the muzzle
  • the stock typically prevents barrel 20 from vibrating freely where the two members are contiguous, i e along the barrel channel of the stock
  • barrel 20 is preferably free to vibrate approximately from the location of locking bolt 50 forward to the firearm muzzle, which permits dampening of the standing waves without interference from the barrel channel inside the stock's forearm
  • the depth of countersinking of the opening of female escutcheon 40 is preferably chosen so that the head of locking bolt 50 when tightened is flush with the bottom of the forearm, however, the head may optionally protrude or be inset according to the
  • Post 10 may be affixed to firearm barrel 20 using various configurations As shown in FIGS 3a and 3b, post 10 may comprise square head 70 that fits square slot 75, or dovetail head 80 that fits dovetail slot 85 In either case, the post can be press fit in place and left as such, or subsequently hard soldered, preferably using 3% nickel soldering rod, or welded in place As shown in FIG 3c, post 10 can be hard soldered into recess 30, or may be soldered or welded directly to the exterior of barrel 20 as shown in FIG 3d As shown in FIG 3e, post 10 may alternately be machined from the barrel blank, which typically starts off with a diameter of 2 ⁇ U-2Vz , when the blank is being milled and/or lathed to produce rifle barrel 20 For this embodiment post 10 would be integrally formed with barrel 20
  • post 10 comprises a cylindrical tube (fully threaded, partially threaded or unthreaded), and recess 30 is threaded
  • locking bolt 50 screws directly into recess 30, and optionally additionally screws into post 10 if used
  • female escutcheon 40 is not used and locking bolt 50 directly holds the stock to barrel 20, or one or more locking bolts 50 are placed in locations that are not coincident with the stock in order to fine tune the control of the barrel vibrations
  • a 256 Newton custom 98 Mauser rifle equipped with the vibrational stability device of the present invention was test fired by a shooting and ballistics expert using a variety of ammunition at various loads
  • recess 30 was located 8 50" from the muzzle Post 10 was 375" in diameter and 500" long, and comprised a 185" diameter hole with 10-32 TPI threads
  • Female escutcheon 40 was 9/16" high comprised a 1 %' x 3 ⁇ " diamond-shaped top as shown in Fig 2b, and comprised edge 45 which comprised a 6° bevel and was 25" high Swivel hole 60 was 145 in diameter Testing showed that there were effectively no signs of high pressure due to the installation of the device, with a maximum case head expansion of 002 and only one instance of slightly sticky bolt lift Bullets of various weights and loads shot monotonously to the same place Ten shots were fired into two inches using 85, 100, 129, and 140 grain weight bullets in five loads, all but two of the shots fell inside an inch and a half at 100 yards

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Toys (AREA)
  • Telescopes (AREA)

Abstract

L'invention concerne un appareil et un procédé pour contrôler les vibrations d'un canon d'arme à feu et augmenter ainsi la précision de la mise à feu et l'uniformité de tir. Un montant est fixé sur le canon de l'arme à feu et système de verrouillage est vissé au montant. Dans le cas d'un fusil ou d'une arme similaire, le système de verrouillage s'étend de préférence à travers une plaque d'entrée qui sert à relier les munitions au canon.
PCT/US2007/069617 2006-05-24 2007-05-24 Dispositif de stabilisation des vibrations d'un canon d'arme à feu WO2008111988A2 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US80831906P 2006-05-24 2006-05-24
US60/808,319 2006-05-24
US11/752,881 US20070271833A1 (en) 2006-05-24 2007-05-23 Firearm barrel vibrational stabilizing device
US11/752,881 2007-05-23

Publications (2)

Publication Number Publication Date
WO2008111988A2 true WO2008111988A2 (fr) 2008-09-18
WO2008111988A3 WO2008111988A3 (fr) 2008-11-13

Family

ID=38748208

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2007/069617 WO2008111988A2 (fr) 2006-05-24 2007-05-24 Dispositif de stabilisation des vibrations d'un canon d'arme à feu

Country Status (2)

Country Link
US (1) US20070271833A1 (fr)
WO (1) WO2008111988A2 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007056455B4 (de) * 2007-11-23 2014-05-08 Diehl Bgt Defence Gmbh & Co. Kg Waffenrohr und Dämpfungseinrichtung
US9285178B2 (en) * 2013-08-05 2016-03-15 Timothy Sellars Method for improving rifle accuracy
US9429387B1 (en) 2015-03-20 2016-08-30 Magpul Industries Corp. Modular stock for a firearm
US10345076B2 (en) 2017-03-07 2019-07-09 Magpul Industries Corp. Firearm barrel tray, stock, and related methods
USD844735S1 (en) 2017-03-07 2019-04-02 Magpul Industries Corp. Firearm stock

Citations (3)

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US2205857A (en) * 1938-11-30 1940-06-25 Western Cartridge Co Firearm construction
US2589912A (en) * 1949-08-09 1952-03-18 Leon S Weld Barrel bedding device for rifles
US4014247A (en) * 1974-11-19 1977-03-29 Ithaca Gun Company, Inc. Gas-operated shotgun

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US952940A (en) * 1909-10-20 1910-03-22 Washington Herd Gun.
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US2073755A (en) * 1934-07-11 1937-03-16 Luther Samuel Moore Firearm accessory
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US2259569A (en) * 1938-01-24 1941-10-21 Dean W King Pistol balance
US2214071A (en) * 1938-12-01 1940-09-10 Western Cartridge Co Bolt-action firearm
US2205982A (en) * 1939-05-11 1940-06-25 Western Cartridge Co Stock-and-barrel assembly for firearms
US2372568A (en) * 1943-11-20 1945-03-27 Jesse M Grigg Gun
US2841909A (en) * 1954-07-12 1958-07-08 Olin Mathieson Constant torque-type stress appliance for firearm barrels
US2941326A (en) * 1958-05-07 1960-06-21 Remington Arms Co Inc Resilient barrel supporting device for firearms
US2967368A (en) * 1958-07-31 1961-01-10 Selden T Williams Mounting of gun barrel in its stock
US3060612A (en) * 1958-10-13 1962-10-30 Brown Edwards Means for imposing a predetermined force between adjacent members
US3191330A (en) * 1964-06-29 1965-06-29 Ole N Olson Vibration damper for firearms
DE7404108U (de) * 1974-02-06 1974-05-02 Anschuetz J Gmbh Wettkampfschußwaffe
US4008536A (en) * 1975-03-10 1977-02-22 Adams Jean M Detachable gun sight mounts
US4057924A (en) * 1976-11-04 1977-11-15 Joseph Robert P Rifle barrel stabilizer
US4679487A (en) * 1984-06-12 1987-07-14 Custom Technical Enterprises Projectile firing weapon with a replaceable firing mechanism actuator cassette
US4864761A (en) * 1987-08-18 1989-09-12 Gregory Jimmie E Barrel vibration dampening device for rifles
DE4122835A1 (de) * 1991-07-10 1993-01-21 Mayer Grammelspach Dianawerk Rueckstossarme schusswaffe
US5423145A (en) * 1994-09-16 1995-06-13 Nasset; James L. Rifle-barrel harmonic vibration tuning device
US6223458B1 (en) * 1997-04-30 2001-05-01 Kevin Schwinkendorf Harmonic optimization technology
US5798473A (en) * 1997-04-30 1998-08-25 Roblyer; Steven Harmonic optimization system for rifles
US6889462B1 (en) * 2003-09-05 2005-05-10 Robert M. Bayer Harmonic stabilizer system for rifle barrel and a rifle equipped therewith

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2205857A (en) * 1938-11-30 1940-06-25 Western Cartridge Co Firearm construction
US2589912A (en) * 1949-08-09 1952-03-18 Leon S Weld Barrel bedding device for rifles
US4014247A (en) * 1974-11-19 1977-03-29 Ithaca Gun Company, Inc. Gas-operated shotgun

Also Published As

Publication number Publication date
WO2008111988A3 (fr) 2008-11-13
US20070271833A1 (en) 2007-11-29

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