EP0910782A1 - Mecanisme de positionnement du canon d'armes a feu automatiques - Google Patents

Mecanisme de positionnement du canon d'armes a feu automatiques

Info

Publication number
EP0910782A1
EP0910782A1 EP97906063A EP97906063A EP0910782A1 EP 0910782 A1 EP0910782 A1 EP 0910782A1 EP 97906063 A EP97906063 A EP 97906063A EP 97906063 A EP97906063 A EP 97906063A EP 0910782 A1 EP0910782 A1 EP 0910782A1
Authority
EP
European Patent Office
Prior art keywords
barrel
positioning bar
slide
respect
frame
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.)
Granted
Application number
EP97906063A
Other languages
German (de)
English (en)
Other versions
EP0910782B1 (fr
Inventor
Sylvain Dionne
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.)
SNC Technologies Inc
Original Assignee
SNC INDUSTRIAL TECHNOLOGIES Inc (LES TECHNOLOGIES INDUSTRIELLES SNC INC)
SNC Industrial Technologies Inc
SNC Technologies Inc
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 SNC INDUSTRIAL TECHNOLOGIES Inc (LES TECHNOLOGIES INDUSTRIELLES SNC INC), SNC Industrial Technologies Inc, SNC Technologies Inc filed Critical SNC INDUSTRIAL TECHNOLOGIES Inc (LES TECHNOLOGIES INDUSTRIELLES SNC INC)
Priority to PT97906063T priority Critical patent/PT910782E/pt
Publication of EP0910782A1 publication Critical patent/EP0910782A1/fr
Application granted granted Critical
Publication of EP0910782B1 publication Critical patent/EP0910782B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F41A33/00—Adaptations for training; Gun simulators
    • 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
    • F41A5/32—Energy accumulator systems, i.e. systems for opening the breech-block by energy accumulated during barrel or gas piston recoil
    • F41A5/34—Energy accumulator systems, i.e. systems for opening the breech-block by energy accumulated during barrel or gas piston recoil with spring accumulators

Definitions

  • This invention relates to the field of firearms and provisions for modifying semi-automatic firearms for training purposes.
  • it relates to the positioning of barrels to ensure reliable chambering in blow-back firearms that have been modified to fire low-energy ammunition.
  • the weapon modifications required to permit cycling while firing low-energy training ammunition generally include replacing or modifying the barrel and sometimes replacing or adding one or two other components, depending on the weapon involved. These modifications also serve to increase safety.
  • the caliber of the substitute barrel may be made smaller than the diameter of the projectiles of standard 9 mm ammunition. Then, if an attempt is made to chamber a standard round in such a training-adapted firearm, the barrel will not normally admit entry of the standard projectile. This ensures that such modified weapons cannot fire standard, live ammunition.
  • the low-energy cartridge represented by United States Patent N B 5,359,937 in combination with a substitute training barrel, allows normal recoil and cartridge case ejection through a blow-back action.
  • a training barrel of the type addressed by the invention is similar in most aspects to the standard barrel for a particular breech-locked pistol but is modified, in part, by removing the locking mechanism that holds the barrel and slide together for the first portion of the recoil cycle.
  • the barrel- slide locking mechanism has been removed so that the weapon can fire low-energy ammunition as represented by United States Patent N a 5,359,937
  • the barrel does not move rearward far enough after firing to be in its proper position to receive the next round to be chambered. This happens precisely because the barrel is no longer locked to the slide, which would normally carry the barrel to the correct position before unlocking and leaving it there.
  • This invention is directed to an automatic pistol adapted to fire low-energy training ammunition by the substitution of a training barrel that omits the breech-lock feature normally present. It provides a system for the positioning of the barrel for reloading by adding a spring- loaded device to the bottom of the training barrel which, upon firing, positively moves the barrel rearward to its required position for receiving the next cartridge from the magazine in a manner which is completely independent from the motion of the slide. Without this barrel positioning mechanism, the barrel would be too far forward from the top of the magazine and the incoming cartridge would not necessarily enter the chamber cleanly, hence provoking a weapon jam whenever such misalignment should occur.
  • a firearm is provided with a slide and a barrel which at no time are locked together during the firing cycle.
  • the barrel is provided with a spring-loaded positioning bar which serves as a barrel positioning device.
  • This positioning bar with its associated spring is mounted on the barrel, allowing free longitudinal movement between the bar and the barrel.
  • some barrel designs include protrusions in the form of spaced lugs on the barrel, and the positioning bar and spring may be carried by two of the barrel lugs.
  • the positioning bar abuts at its forward end the barrel locking pin or some other suitable anchor point in the frame of the weapon.
  • the barrel positioning spring is at maximum compression because the slide has pushed the barrel to its farthest forward position during chambering of the low-energy cartridge to be fired.
  • the slide recoils without pulling the barrel back with it. Even though there is nothing obstructing rearward movement of the barrel, because the two pieces (slide and barrel) are not locked together, the barrel would normally not move rearwardly without the barrel positioning mechanism of the invention being present. Rearward motion of the barrel is effected by the barrel positioning mechanism as it bears on the barrel locking pin, its spring force being expressed in the rearward direction.
  • One way of attaching the barrel positioning mechanism to the barrel is by providing a seating pin at the forward face of the rear lug of the barrel and seating one end of the barrel positioning spring over the seating pin. The other end of the positioning spring is attached to the positioning bar.
  • a groove in the adjacent, forward barrel lug receives and embraces the positioning bar.
  • the forward barrel lug will move longitudinally over the positioning bar, which is held in the groove by a lateral pin which passes through an elongated slot in the bar and is fixed to the forward lug.
  • the travel of the barrel is delimited by this pin- and-slot arrangement in the positioning bar, which ensures, through the length of the slot and the location of the lateral pin relative to the back face of the barrel, that the barrel is in the correct position to receive the next round to be chambered when the slide returns to close the breech.
  • the subject training barrel after being properly positioned rearwardly by the barrel positioning device, does not need to be continually held in place during the entire chambering of the next cartridge to be fired.
  • the barrel may commence to move forward as soon as the tip of the projectile begins to enter the chamber. This forward movement may occur because the spring in the barrel positioning device is extended after pushing the barrel rearward and presents no appreciable resistance to forward barrel movement under the influence of the returning slide. This is in contrast to the prior art design of Porter, which describes a much stronger detent mechanism to hold the barrel in place "until a cartridge has been successfully chambered".
  • the barrel positioning spring must be of sufficient length and strength that it will be held in compression by the force of the spring or springs driving the slide, when the barrel is in its forward position prior to firing.
  • the mechanical characteristics of the barrel positioning spring in compression must be such that this spring will be capable of readily lengthening from its compressed state to move the barrel positively back to the required position for receiving the next round, as determined by the pin and slot arrangement after the slide recoils.
  • the barrel positioning spring remains only partially expanded after rearward movement of the barrel ceases so that the barrel will not move forward again until the slide of the weapon commences to chamber the next cartridge.
  • the strength of the spring in the barrel positioning device is much less than the strength of the spring or springs associated with the slide so that the motion of the slide will not be impeded as it returns to close the breech and push the barrel forward in preparation for firing of the next cartridge. In doing so, this action of the slide recompresses the barrel positioning spring, readying it for the next cycle.
  • Figure 1 is a partially cutaway, cross-sectional side-view of a prior art pistol ready to fire standard 9mm ammunition (only the barrel, slide, locking mechanism, part of the frame and part of the magazine are shown) .
  • Figure 2 is the same side-view cross-section of the same pistol as in Figure 1 except that it now contains a training barrel, complete with the barrel positioning mechanism, and is ready to fire low-energy ammunition as represented by United States Patent N a 5,359,937.
  • the spring in the barrel positioning device is at maximum compression.
  • Figure 3 is a partial cross-section through a barrel lug and the pistol frame of the pistol of Figure 2.
  • Figure 4 shows the pistol of Figure 2 after firing with the slide in its most rearward position, ready to be moved forward by the slide recoil spring or springs (not shown) .
  • the spent case from the cartridge of Figure 2 after firing has been ejected from the weapon and the next cartridge from the magazine is in position to be chambered by the returning slide.
  • FIG 1 a prior art 9 mm pistol is shown having a barrel 1 with lugs 5, 5A, slide 2, a normal barrel-slide locking mechanism 3 with piston 7, frame 6 with barrel locking pin 4 and magazine 9, and standard 9 mm service ammunition 8.
  • barrel 1 is replaced by training barrel 10, as shown in Figure 2.
  • Training barrel 10 differs from prior art barrel 1 in that the barrel-slide locking mechanism 3 with piston 7 is replaced by barrel positioning mechanism 11 consisting of barrel positioning bar HA with slot HE, spring IIB, spring seating pin 11C, and transverse pin 11D.
  • the preferred cross-section of the barrel positioning bar HA is rectangular, it could also be circular or some other shape.
  • the rearward end of spring HB is mounted on seating pin HC, which is attached to lug 5A, pointing forwardly.
  • the other, forward end of positioning spring HB is attached to positioning bar HA, around which grove 13 in lug 5 is free to move longitudinally and parallel to the barrel.
  • the forward end of positioning bar HA abuts against barrel locking pin 4 on the frame 6, thereby immobilizing positioning bar HA with respect to the frame 6 during the firing cycle.
  • This forward end may be curved to mate intimately with the surface of the barrel locking pin 4.
  • Positioning bar HA is held in groove 13 by transverse pin HD in slot HE.
  • Pin HD is anchored in lug 5, hence both move with the same motion as the training barrel 10.
  • the location of pin HD and the length and location of slot HE are such that the stroke of pin HD is sufficient to allow movement of training barrel 10 rearward, after firing of the weapon, to its proper position for chambering of the next cartridge to be fired.
  • Rearward movement of training barrel 10 from its forward position at the moment of firing is effected by positioning spring HB, which is in compression at the time of firing. Since positioning bar HA does not move because it is abutted against barrel locking pin 4 , positioning spring HB is constrained to expand rearward only.
  • the functioning of the subject barrel positioning device has been tested many hundreds of times in Walther P-5 pistols with complete success and reliability.
  • the barrel positioning device of the invention is particularly suited for training barrels for such 9 mm automatic pistols as the Walther P-5, Walther P-38, Beretta 92 and Beretta 96, but may also be applicable to other automatic firearms that fire low- energy ammunition as represented by United States Patent N a 5,359,937 or other type of low-energy ammunition, including blanks.

Landscapes

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

Abstract

Avec ce canon d'exercice pour arme à feu fonctionnant, normalement, culasse verrouillée et par refoulement, il est fait abstraction de la fonction de verrouillage de culasse qui est alors assurée par un dispositif de positionnement du canon, ce dispositif étant rattaché au canon. Un ressort fournit la force permettant de ramener le canon en arrière sur une position adaptée à la réception de la cartouche suivante en cours de chargement.
EP97906063A 1997-03-14 1997-03-14 Mecanisme de positionnement du canon d'armes a feu automatiques Expired - Lifetime EP0910782B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PT97906063T PT910782E (pt) 1997-03-14 1997-03-14 Mecanismo de posicionamento do cano para armas de fogo automaticas

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CA1997/000174 WO1998041809A1 (fr) 1997-03-14 1997-03-14 Mecanisme de positionnement du canon d'armes a feu automatiques

Publications (2)

Publication Number Publication Date
EP0910782A1 true EP0910782A1 (fr) 1999-04-28
EP0910782B1 EP0910782B1 (fr) 2002-08-07

Family

ID=4173203

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97906063A Expired - Lifetime EP0910782B1 (fr) 1997-03-14 1997-03-14 Mecanisme de positionnement du canon d'armes a feu automatiques

Country Status (3)

Country Link
EP (1) EP0910782B1 (fr)
DE (1) DE69714592T2 (fr)
WO (1) WO1998041809A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7278358B2 (en) 2004-01-22 2007-10-09 Pdt Tech, Llc. Non-lethal marking bullet for related training cartridges
US7225741B2 (en) 2004-01-22 2007-06-05 Pdt Tech, Llc Reduced energy training cartridge for self-loading firearms

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4907489A (en) * 1988-08-31 1990-03-13 The United States Of America As Represented By The United States Department Of Energy Blank fire configuration for automatic pistol
DE4109777A1 (de) * 1991-03-25 1992-10-01 Heckler & Koch Gmbh Vorrichtung zur geschossartigen beschleunigung von gegenstaenden, insbesondere verriegelte selbstladeschusswaffe
US5433134A (en) * 1993-10-05 1995-07-18 Leiter; Edward J. Blank firing conversions for semiautomatic pistols
DE4341131C1 (de) * 1993-12-02 1995-02-02 Heckler & Koch Gmbh Schußwaffe mit Rückstoßabpufferung, insbesondere Faustfeuerwaffe

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9841809A1 *

Also Published As

Publication number Publication date
WO1998041809A1 (fr) 1998-09-24
DE69714592D1 (de) 2002-09-12
EP0910782B1 (fr) 2002-08-07
DE69714592T2 (de) 2003-10-09

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