WO1986007136A1 - Amelioration apportee a des fermetures de culasse pour arme a feu - Google Patents

Amelioration apportee a des fermetures de culasse pour arme a feu Download PDF

Info

Publication number
WO1986007136A1
WO1986007136A1 PCT/SE1986/000250 SE8600250W WO8607136A1 WO 1986007136 A1 WO1986007136 A1 WO 1986007136A1 SE 8600250 W SE8600250 W SE 8600250W WO 8607136 A1 WO8607136 A1 WO 8607136A1
Authority
WO
WIPO (PCT)
Prior art keywords
lock bolt
receiver
fire
shoulders
lock
Prior art date
Application number
PCT/SE1986/000250
Other languages
English (en)
Inventor
Rolf KARLSTRÖM
Original Assignee
Affärsverket Ffv
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 Affärsverket Ffv filed Critical Affärsverket Ffv
Publication of WO1986007136A1 publication Critical patent/WO1986007136A1/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
    • F41A3/00—Breech mechanisms, e.g. locks
    • F41A3/12—Bolt action, i.e. the main breech opening movement being parallel to the barrel axis
    • F41A3/14—Rigid bolt locks, i.e. having locking elements rigidly mounted on the bolt or bolt handle and on the barrel or breech-housing respectively
    • F41A3/16—Rigid bolt locks, i.e. having locking elements rigidly mounted on the bolt or bolt handle and on the barrel or breech-housing respectively the locking elements effecting a rotary movement about the barrel axis, e.g. rotating cylinder bolt locks
    • F41A3/30—Interlocking means, e.g. locking lugs, screw threads

Definitions

  • the present invention generally relates to an improvement in lock bolts for fire arms, and the invention is more specifically concerned with a new and improved design of the closing shoulders 5 of the lock bolt of a fire arm and the corresponding end surfaces of the receiver of the weapon, whereby the lock bolt is self centering in the receiver.
  • the radially projecting closing shoulders of the lock bolt and the corresponding receiving 0 surfaces of the receiver of the weapon generally are formed with plane radial surfaces extending substantially at 90° to the axial direction.
  • the lock bolt has to be formed with a slight play in relation to the circular cylindric guide of the
  • the invention is intended to solve the above mentioned problem by forming the rear edges of the closing shoulders of the lock bol and the corresponding guide surfaces of the receiver conically widened forwards, as seen in the fire direction, whereby the lock bolt in case of a possible tendency to side displacement in relation to the axis of the receiver automatically adjusts itself into the exact axial position in that the conical contact surfaces of the lock bolt shoulders slide along the corresponding surfaces of the receiver until all lock bolt shoulders are in contact with the conical support surfaces of the receiver.
  • Tests have proved that the opening angle for the said forwarly conically widened contact surfaces should be between 140° and 170° or preferably about 150°, that is an angle to the radial plane of between 5° and 20° or preferably about 15°.
  • the invention solves two different problems at the same time, namely both to provide a self centering of the front end of the lock bolt, thereby eliminating the risk that said end of the lock bolt is side displaced 1n relation to the receiver, and to reduce or eliminate the risk that the lock bolt shoulders break.
  • the weapon system as a whole presents the advantage of being stronger than the present weapons of the corresponding type.
  • figure 1 shows a fragmentary cross section through a part of a weapon having a receiver and a lock bolt designed according to the invention.
  • Figure 2 diagrammatically shows a lock bolt designed as in conventional weapons and in which the front end is shown in two opposite side displaced extreme positions.
  • Figure 3 shows, likewise diagrammatically-, an apparatus according to the invention.
  • Figure 4 shows a cross section along line IY-IV in figure 1.
  • figure 1 shows a part of a fire arm, especially a repeating fire arm, and for the sake of clearness the main part of the weapon has beed excluded in the figure.
  • the illustrated parts are the receiver 1, in which a lock bolt 2 is introduced and is locked in the firing position.
  • the receiver 1 is formed with a circular cylindric guide groove 3 for the lock bolt and with three guide grooves 4, 5 and 6 for the closing shoulders 7, 8 and 9 of the lock bolt.
  • the barrel 11 is thread connected and between the receiver and the barrel a recoil shoulder 12 is cla pled.
  • the figure syows, somewhat exaggeratedly, that the lock bolt 2 is engaging the cylindrical guide groove 3 of the receiver with some play 13.
  • the rear edges 15 of the lock bolt shoulders and the corresponding contact surfaces of the receiver are, according the invention, formed conically widened in the fire direction.
  • the angle is Illustrated as the angle V between the radial plane of the receiver and the rear edge of the lock bolt sholder 8 and the contact surface of the receiver therefore. The magnitude of the angle is of importance.
  • a too little angle both gives a too slight shearing force to allow the lock bolt, on all occasions, to slide into the correct position In relation to the contact surfaces of the receiver when the bolt is locked by being rotated in the receiver, and apart therefrom the reduction of the axial force to which the lock bolt shoul ers are subjected does not become so strong that the risk that the lock bolt shoulders break can be considered eliminated.
  • a too large angle on the other hand, a too strong radial force is transmitted to the receiver at the recoil moment, so that there is a risk that the receiver is damaged.
  • the lock bolt, by wedge action is pressed to a too strong engagement with The receiver.
  • the angle should be between 5° and 20°, equivalent to an opening angle for the cone surfaces of between 140° and 170°.
  • the angle v should be about 15°, equivalent to an opening angle for the cone surfaces of 150°.
  • the shearing force is sufficiently great for pressing a side displaced lock bolt into the correct position in the receiver, and at the same time the relationship between the risk of rupture of the lock bolt shoulders and of the receiver is equalized whereby the best possible strength is obtained.
  • lock bolt shoulders 7-9 provided evenly distributed round the lock bolt and three corresponding guide grooves 3-5 in the receiver.

Landscapes

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

Abstract

Amélioration apportée à des armes à feu du type de celles comprenant une boîte de culasse (1) dans lequel une fermeture de culasse est mobile et peut être verrouillée en position de tir lors de l'introduction d'une cartouche (14) en position de tir et dans laquelle la fermeture de culasse est formée de deux ou de plusieurs épaules de fermeture (7, 8) destinées à verrouiller la fermeture de culasse (1) dans la position de tir avec les côtés postérieurs de ladite fermeture de culasse et avec les surfaces de contact correspondantes de la boîte de culasse. Selon la présente invention, les bords postérieurs (15) de la fermeture de culasse et les surfaces de contact correspondantes de la boîte de culasse s'étendent de manière conique dans le sens de la direction de tir de l'arme à feu et forment un angle par rapport au plan radial de la fermeture de culasse et de la boîte de culasse de 5 à 20o ou de préférence d'environ 15o.
PCT/SE1986/000250 1985-05-30 1986-05-30 Amelioration apportee a des fermetures de culasse pour arme a feu WO1986007136A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8502668-0 1985-05-30
SE8502668A SE460308B (sv) 1985-05-30 1985-05-30 Anordning vid slutstycke foer skjutvapen

Publications (1)

Publication Number Publication Date
WO1986007136A1 true WO1986007136A1 (fr) 1986-12-04

Family

ID=20360389

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1986/000250 WO1986007136A1 (fr) 1985-05-30 1986-05-30 Amelioration apportee a des fermetures de culasse pour arme a feu

Country Status (3)

Country Link
EP (1) EP0224554A1 (fr)
SE (1) SE460308B (fr)
WO (1) WO1986007136A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8479429B2 (en) 2009-03-24 2013-07-09 Sturm, Ruger & Company, Inc. Firearm with quick coupling barrel system
US8490312B2 (en) 2009-03-24 2013-07-23 Sturm, Ruger & Company, Inc. Quick coupling barrel system for firearm
US8505227B2 (en) 2009-03-24 2013-08-13 Sturm, Ruger & Company, Inc. Firearm with quick coupling barrel interlock system
US9057576B2 (en) 2009-03-24 2015-06-16 Sturm, Ruger & Company, Inc. Firearm with quick coupling barrel system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2093168A (en) * 1981-02-13 1982-08-25 Ikaplast Locking bolt for a rifle

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2093168A (en) * 1981-02-13 1982-08-25 Ikaplast Locking bolt for a rifle

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8479429B2 (en) 2009-03-24 2013-07-09 Sturm, Ruger & Company, Inc. Firearm with quick coupling barrel system
US8490312B2 (en) 2009-03-24 2013-07-23 Sturm, Ruger & Company, Inc. Quick coupling barrel system for firearm
US8505227B2 (en) 2009-03-24 2013-08-13 Sturm, Ruger & Company, Inc. Firearm with quick coupling barrel interlock system
US9057576B2 (en) 2009-03-24 2015-06-16 Sturm, Ruger & Company, Inc. Firearm with quick coupling barrel system

Also Published As

Publication number Publication date
SE8502668D0 (sv) 1985-05-30
EP0224554A1 (fr) 1987-06-10
SE460308B (sv) 1989-09-25
SE8502668L (sv) 1986-12-01

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