WO1997014928A1 - Arme a feu - Google Patents

Arme a feu Download PDF

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Publication number
WO1997014928A1
WO1997014928A1 PCT/GB1996/002518 GB9602518W WO9714928A1 WO 1997014928 A1 WO1997014928 A1 WO 1997014928A1 GB 9602518 W GB9602518 W GB 9602518W WO 9714928 A1 WO9714928 A1 WO 9714928A1
Authority
WO
WIPO (PCT)
Prior art keywords
barrel
round
weapon
breech block
breech
Prior art date
Application number
PCT/GB1996/002518
Other languages
English (en)
Inventor
Norman Trevor Brint
Original Assignee
Norman Trevor Brint
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 Norman Trevor Brint filed Critical Norman Trevor Brint
Priority to AU73103/96A priority Critical patent/AU7310396A/en
Publication of WO1997014928A1 publication Critical patent/WO1997014928A1/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
    • F41A5/00—Mechanisms or systems operated by propellant charge energy for automatically opening the lock
    • F41A5/02—Mechanisms or systems operated by propellant charge energy for automatically opening the lock recoil-operated
    • F41A5/08—Mechanisms or systems operated by propellant charge energy for automatically opening the lock recoil-operated having an accelerator lever acting on the breech-block or bolt during the opening movement
    • 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
    • F41A5/02—Mechanisms or systems operated by propellant charge energy for automatically opening the lock recoil-operated

Definitions

  • This invention relates to a weapon and in particular but not exclusively to a semi-automatic weapon firing rounds which have a radially projecting rim.
  • the present invention is primarily but not exclusively concerned with hand held weapons of relatively large calibre and relatively low velocity.
  • a weapon comprising a body defining a bore and a barrel as ⁇ embly slidable within the bore in a forward direction corresponding to the direction of firing of the weapon and in a rearward direction corresponding to recoil of the barrel as ⁇ embly after firing, further comprising recoil spring means operable between the body and the barrel assembly to bias the barrel assembly into the forward direction; wherein the barrel assembly comprises a barrel, a barrel extension fixed to the barrel and projecting coaxially therefrom in the rearward direction, a breech block slidably received in the barrel extension and co-operable with the .barrel in a forward extremity of movement of the breech block relative to the barrel extension to define a chamber within which a round is fired in use, and wherein the breech block further comprises a firing mechanism operable in use to fire the round.
  • the weapon comprises a linkage operatively connecting the body, the barrel extension and the breech block, the linkage being operable to maintain the breech block in fixed relationship with the barrel during a part of a firing cycle of the weapon in which the breech closes a firing chamber defined by the barrel, and wherein the linkage is further operable to provide differential movement therebetween in which the rate of movement of the breech block relative to the body is proportional to and greater than the rate of movement of the barrel extension relative to the body.
  • Such an arrangement has the advantage of providing smooth operation and positive action.
  • An advantage of such a method is that it is not necessary to provide a separate ejection mechanism for engaging the spent casing to eject it from the ejection aperture.
  • An advantage of such a method is to reduce the effects of recoil by firing the round while the barrel is moving forwardly and al ⁇ o providing positive and smooth feeding of the round by action of the breech block.
  • Figure 1 is a schematic part sectioned view showing the breech mechanism in accordance with the present invention, showing the position of breech components at a re ⁇ t po ⁇ ition of the firing cycle;
  • Figure 2 is a schematic view of the breech mechanism Figure 1 showing the position of components during a run out phase of the firing cycle;
  • Figure 3 is a schematic ⁇ ectional view of the breech mechanism of previous Figures showing the position of components at a phase of the firing cycle in which the round is chambered;
  • Figure 4 is a schematic sectional view of the breech mechani ⁇ of previous Figures showing the position of components at the point of firing the round;
  • Figure 5 is a schematic sectional view in side elevation in which the position of the round at different stage ⁇ of the firing cycle i ⁇ superimposed;
  • Figure 6 is a schematic side elevation showing the operation of an inner feed ⁇ lide relative to the breech block of the mechanism of preceding Figures;
  • Figure 7 is a schematic view of the components of Figure 6 illustrating rearward motion of the inner feed ⁇ lide to release a round;
  • Figure 8 is a schematic side elevation showing the components of Figures 6 and 7 after return forward motion of the inner feed slide;
  • Figure 9 is a schematic side elevation showing the relationship between an outer feed slide and the breech block
  • Figure 10 is a schematic ⁇ ide elevation of the component ⁇ of Figure 9 ⁇ howing movement of the outer feed ⁇ lide during recoil of the breech block;
  • Figure 11 i ⁇ a schematic side elevation of the compone ⁇ t ⁇ of Figure ⁇ 9 and 10 ⁇ howing movement of the outer feed slide to release a round during ejection of a ⁇ pent cartridge;
  • Figure 12 i ⁇ a diagram in axial view illu ⁇ trating the true position of a round retaining catch
  • Figure 13 is a schematic axial view illustrating the positions of the inner and outer feed slides
  • Figure 14 is a schematic axial view showing the position of the inner and outer feed slide ⁇ relative to the rim of a round after disengagement of the inner feed slide from the rim;
  • Figure 15 is a schematic axial view showing the position of the outer feed slide relative to a round during ejection of a spent cartridge
  • Figure 16 is a schematic part sectioned side elevation showing the relationship between the breech block and trigger
  • Figure 17 is a schematic side elevation of the components of Figure 16 after actuation of the trigger to release the breech block;
  • Figure 18 is a schematic ⁇ ide elevation of the component ⁇ of Figure ⁇ 16 and 17 ⁇ howing the recoil of the breech and motion of the inner feed ⁇ lide and trigger;
  • Figure 19 i ⁇ a ⁇ chematic ⁇ ide elevation of the component ⁇ of Figures 16 to 18 illustrating the manner in which the trigger is prevented from actuation after exhaustion of rounds in the magazine;
  • Figure 20 i ⁇ a plan view of the components of Figure 19;
  • Figure 21 is an external side view of a weapon including the components of preceding Figures.
  • Figure 1 show ⁇ ⁇ chematically the manner in which a round 1 i ⁇ held by a breech block 2 in a breech opening 3 defined by a cylindrical barrel exten ⁇ ion 4.
  • Figure 1 illustrates stage 1 of a firing cycle in which the weapon is ready for action which will commence when triggered by an operator.
  • Figure 1 is generally a partly sectioned plan view with the weapon being oriented in a position of normal use in which rounds are fed in an upward vertical direction into the breech remain opening 3, the uppermost round l being shown in the drawing.
  • the round 1 is a 40 mm calibre grenade round.
  • the barrel extension 4 is fixed to a barrel 5 such that both the barrel and the barrel extension are axially slidable within a cylindrical body 6 which is held in a fixed position by the user.
  • the firing cycle includes an initial run out motion during which the barrel move ⁇ forward in the firing direction to a po ⁇ ition in which relative movement of the breech block 2 move ⁇ the round 1 into a chamber 7 defined by a rear end of the barrel 5, the round then being fired while the barrel 5 is moving forward.
  • Relative movement of the barrel 5 and the body 6 is initially checked as shown in Figure 1 by a sear 8 pivotally mounted on the body and engaging the breech block 2.
  • Relative motion between the breech block 2 and the barrel extension 4 during run out is achieved by means of a geared pinion 9 rotatably mounted on the barrel extension 4 so as to engage a linear and axially extending rack 10 mounted on the body 6, the pinion at the same time engaging a second linear rack 11 extending axially along an actuating member in the form of an actuating rod 12 to which the breech block 2 is connected.
  • a co pres ⁇ ion coil spring 13 extends axially between a rear end of the body 6 and the actuating rod 12 so as to forwardly bias the actuating rod.
  • the actuating rod 12 together with the breech block 2 moves under action of the spring 13 in the forward direction, forward motion being simultaneously transmitted via the pinion 9 to the barrel extension 4 , the gearing of the pinion and racks 10 and 11 in the preferred embodiment being arranged to transmit movement in the ratio 2:1, i.e. the barrel extension 4 and the barrel 5 move at half the speed of the breech block 2 during run out.
  • Figures 1 and 2 include a sector 14 which is viewed in side elevation to reveal the operation of the sear 8, the remainder of the Figures 1 and 2 being viewed in plan.
  • the initial run out motion entails the actuating rod 12 being connected to the breech block 2 ⁇ uch that the actuating rod and breech block move in uni ⁇ on.
  • the breech block 2 include ⁇ a cylindrical rece ⁇ 15 into which a forward end 26 of the actuating rod 12 can advance during a later pha ⁇ e of the run out a ⁇ illustrated in Figure 4 during which the actuating rod is freed from the breech block and the breech block 2 engages the barrel 5 to close the chamber 7 in readiness for firing.
  • the position at which the breech block 2 engages the barrel 5 is shown in Figure 3.
  • radially slidable coupling members in the form of locking plates 16 are mounted in the breech block to provide a releasable coupling and are arranged such that, in the initial phase of run out, forward motion of the actuating rod into the reces ⁇ 15 i ⁇ prevented by the locking plates 16 as shown in Figure 1.
  • Recesses 17 to accommodate the locking plates 16 are provided in the barrel exten ⁇ ion 4, the axial position of the recesses being such that the locking plates can move radially outwardly into the recesses in the configuration shown in Figure 3 at the same time as further relative motion between the breech extension 4 and breech block 2 is prevented by contact of the breech block with the barrel 5.
  • the forward end 26 of the actuating rod 12 and the co-operating ⁇ urface ⁇ of the locking plates 16 are cammed so as to provide radial motion of the locking plates by cam action.
  • the relative movement between the actuating rod 12 and the breech block 2 is utilised to release a firing pin 18 in order to fire the round 1.
  • the firing pin 18 projects forwardly of the forward end of the actuating rod 12 and is forward biased by mean ⁇ of a firing pin compre ⁇ ion ⁇ pring 19 which i ⁇ held in compression between the rear end of the firing pin and a stop in the form of a cross pin 20 fixed to the breech block.
  • the rear end of the firing pin 18 projects into a cavity 25 within the actuating rod 12.
  • a longitudinal slot 21 is formed in the actuating rod 12 with a forward end of the slot spaced from the forward end of the cavity.
  • the cros ⁇ pin 20 project ⁇ into the cavity 25 via the slot 21 thereby enabling the spring 19 to seat against the cross pin.
  • relative movement between the breech block 2 and the actuating rod 12 is accompanied by movement of the cross pin 20 along the slot 21, the reverse relative movement during recoil being responsible for axial compression of the firing pin compression spring 19 in readiness for a subsequent firing.
  • the firing pin 18 has a diameter which is stepped at a shoulder 22 which, a ⁇ ⁇ hown in Figure 3, is engaged by a catch 23 mounted on the breech block 2.
  • the catch 23 is provided with cam formations which enable the catch to be radially displaced by contact with the leading end of the actuating rod 12 to a retracted position a ⁇ shown in Figure 4 in which the shoulder 22 i ⁇ di ⁇ engaged thereby allowing the firing pin 18 to move forward, actuated by the firing pin compression spring 19.
  • the round 1 is thereby fired leaving a spent cartridge case remaining in the chamber 7 and delivering a recoil impetus to the breech block 2 which immediately initiates recoil motion.
  • the recoil speed of the actuating rod 12 is twice that of the breech block 2, thereby withdrawing the firing pin 18 relative to the breech block to the position shown in Figure 3 where the catch 23 re-engages the shoulder 22.
  • the firing pin 18 is thereby re-cocked ready for sub ⁇ equent firing.
  • a ⁇ econd phase of recoil commences when the cross pin 20 encounters the forward end of the slot 21, the breech block 2 thereafter being constrained to move in unison with the actuating rod 12, and the locking plates 16 being moved radially inwardly by cam action between co-operating cam surfaces 24 of the locking plates and the barrel extension 4.
  • the ⁇ ub ⁇ equent forward motion is halted when the breech block 2 encounters the sear 8 at a location in which the ⁇ pent cartridge case is in alignment with an ejection aperture 27 as shown in Figure 5 and in alignment with the next round 28 in a magazine 29.
  • the spent cartridge case is subsequently ejected by being displaced by movement of the next round 28 which is forced into the breech opening 3 by spring action.
  • Figure 5 shows in side elevation a number of positions of the round 1 and breech block 2 superimposed on the locus of the barrel extension 4, this drawing therefore being highly schematic. It must also be noted that the position of a round retaining catch 30 is schematically shown in Figure 5 for convenience at the upper radial extremity of the barrel extension 4 whereas in fact its true location i ⁇ at a forty five degree po ⁇ ition relative to vertical a ⁇ shown in Figure 12.
  • the round 1 is held against axial movement relative to the breech block 2 by means of retaining formations in the form of vertical guide ribs 31 which engage a rim 32 projecting radially from the rear end of the round, the ribs also extending into a cannelure 33 adjacent to the rim in a manner which allow ⁇ vertical movement of the round (or ⁇ pent cartridge case) during feeding of rounds or ejections of spent cartridge case ⁇ .
  • the round retaining catch 30 i ⁇ provided to ⁇ electively arrest any vertical movement of the round 1 so as to control movement through the ejection aperture 27.
  • the round 1 is held as shown at position 1 in Figure 5 in which the round retaining catch 30 engages the rim 32 and prevents vertical movement.
  • the catch 30 is pivotally mounted on the breech block 2 by means of a pivot pin 34 which extends through an axially extending slot 35 defined in the catch.
  • a rear end of the catch 30 is also engaged by a compression spring 36 so a ⁇ to forwardly bia ⁇ the catch.
  • the catch 30 ha ⁇ a radially projecting cam 37 co-operable with a first cam face 38 formed on the barrel extension at the forward end of the ejection aperture 27 and a second cam face 39 formed at the forward end of a port 40 formed in the barrel extension adjacent to its rear end.
  • the round retaining catch 30 is pivotally mounted in a manner which allows it to move between a raised position in which the cam 37 projects into either the ejection aperture 27 or the port 40 and a retracted position in which the cam is within the cylindrical side wall of the barrel extension.
  • the breech block 2 and the round 1 are advanced from position 1 through position 2 a ⁇ ⁇ hown in Figure 5, the cam 37 engaging the fir ⁇ t cam face 38 at po ⁇ ition 2 thereby retracting the catch 30 to a position in which it no longer engages the rim radially but lies behind the rim of the round in a retracted position.
  • the catch 30 remains in thi ⁇ retracted position throughout recoil and return to the rest position.
  • the catch 30 is thereby moved to it ⁇ retracted po ⁇ ition after each firing to allow ejection of the spent cartridge case.
  • the spring 36 moves the catch 30 forwards into a position in which it arrests upward movement of the incoming next round 28 thereby returning to the position shown in Figure 5 at position 1.
  • the catch 30 recoils through a sufficient distance to encounter the port 40 but by then has already been retracted ⁇ o a ⁇ to be disengaged from the round 1.
  • the breech block 2 When it is required to clear the weapon by emptying the magazine 29 without firing the weapon, the breech block 2 is manually retracted by mean ⁇ of a laterally projecting arm (not shown) projecting through a ⁇ lot 79 in the body 6 ( ⁇ ee Figure 21) thereby carrying the round 1 rearwardly with the breech block 2.
  • the catch 30 During thi ⁇ rearward motion the catch 30 continues to engage the rim of the round 1 as shown at position 5 in Figure 5.
  • the round 1 is thereby retracted until the base of the round contacts a spring loaded cam member 41 as shown in Figure 5 in a manner which displaces the round upwardly, the upward movement being accommodated by movement of the cam 37 into the port 40.
  • the cam member 41 is formed as an upward projection on a first feed slide 44 described in greater detail below.
  • the cam member 41 is initially moved rearwardly by contact with the round 1 but, following elevation of the round and cam action, the member moves forward by action of its associated ⁇ pring 42 ⁇ o a ⁇ to return into its rest position shown at position 6 in Figure 5 in this position, the round is locked in this elevated position.
  • the breech block 2 is then allowed to move forwardly so that the round 1 moves forwardly, the round retaining catch 30 being initially retarded by abutment with the second cam face 39 so as to move rearwardly relative to the pin 34 and at the same time disengaging the rim of the round.
  • This forward movement of the breech block 2 is subsequently arrested by the ⁇ ear 8 and the round 1 is ejected through the ejection aperture 27 by being displaced by the next round 28 under ⁇ pring action from the magazine 29.
  • a ⁇ erie ⁇ of round ⁇ will generally be ⁇ tored in the magazine 29, the round ⁇ being ⁇ tacked in a row ⁇ uch that the rims of adjacent round ⁇ contact one another at the same axial position. Since the rims have a slightly greater diameter than the casing of each round, a stack of such rounds will assume a slightly non-linear shape so that the magazine 29 will necessarily have an internal shape curved to conform with the shape of the stack of rounds.
  • the magazine 29 incorporates a magazine spring
  • the first feed slide 44 and a second feed slide 57 are located beneath the breech block 2 at a location rearward of a magazine opening 46 through which rounds are displaceable from the magazine 29.
  • the first feed slide 44 extends longitudinally in a direction parallel to the breech block 2 a ⁇ shown in Figure 6 and is axially moveable relative to fixed pins 47 and 48 to an extent defined by co-operating slots 49 and 50 formed in the first feed slide.
  • the fir ⁇ t feed ⁇ lide 44 i ⁇ al ⁇ o ⁇ pring bia ⁇ ed in the forward axial direction by mean ⁇ of a spring 51 as shown in Figure 6.
  • the first feed slide 44 when at it ⁇ re ⁇ t position of maximum forward travel prevents upward motion of the next round 28 by action of the lugs 52 overlaying the upper surface of the rim 53 of the next round.
  • a detent 54 projects upwardly from the rear end of the first feed slide 44 so as to be engagable by a co ⁇ operating formation 55 during recoil motion of the breech block 2 rearwardly of the rest position of Figure 1.
  • the effect of such recoil motion is shown in Figure 7 to be rearward movement of the first feed slide 44 so as to disengage the lugs 52 from the rim 53 thereby allowing the next round 28 to rise under action of spring 43.
  • the second feed slide 57 shown in Figure 9 is similarly located beneath the breech block 2 in proximity with the first feed slide 44.
  • the second feed slide 57 extends generally axially and is mounted on pins 58 and 59 extending through respective slots 60 and 61 which are shaped so as to allow a forward end portion 62 of the second feed slide 57 to be upwardly di ⁇ placeable again ⁇ t action of a ⁇ pring 63 and to allow forward displacement of the second feed slide again ⁇ t action of a spring 64, the extent of movement in each case being limited by the shape of the slots 60 and 61.
  • the second feed slide 57 is thereby spring loaded rearwardly and downwardly and is not influenced by rearward travel of the breech block 2.
  • the forward end portion 62 similarly includes two forwardly projecting lugs 65 which, as shown in Figure 13, are disposed immediately adjacent to the lugs 52 of the first feed ⁇ lide 44 so as to constitute outer and inner pairs of lugs respectively.
  • the lugs 65 of the second feed slide 57 differ from the lugs 52 of the first feed slide 44 in that the lugs 65 are ⁇ haped so as to engage and retain the rim 53 when the second feed ⁇ lide 57 is in its rearward rest position but will release the rim to allow movement of the next round 28 when the second feed slide 57 is moved forward.
  • the second feed slide 57 includes an upwardly projecting detent 66 located at the forward end portion 62 so as to be engagable during forward motion of the breech block 2 if, and only if, the forward end portion 62 is fully raised again ⁇ t action of the spring 63. This will only occur when the rim 53 of the next round 28 is engaged by the lugs 65 so that the spring pressure of the magazine spring 43 acts upwardly via the rounds in the magazine so as to upwardly move the forward end portion 62, the spring force of the spring 63 being selected to be substantially less than that of the magazine spring.
  • the formation 67 is arranged to engage the detent 66 in such a manner that the next round i ⁇ released by movement of the lugs 65 only when the breech block 2 has fully recoiled and then returned forwardly to the rest position.
  • the first and second feed slides 44 and 57 thereby co-operate to prevent release of the next round 28 until the breech block 2 reaches its rest position.
  • the next round is initially retained by action of the first feed slide 44 while the breech block 2 is in the rest position, during run out and during the initial part of recoil.
  • next round is thereby retained at a slightly higher level but still clear of the rim of the spent cartridge case 78 to avoid ⁇ nagging during recoil (or clear of the rim of a live round which i ⁇ manually retracted during reciprocating breech movement to empty the weapon) .
  • the breech block formation 67 engages the detent 66 ( Figure 11) thereby effecting forward motion of the ⁇ econd feed slide 57, thereby releasing the rim 53 of the next round which is then free to rise into the breech opening 3 and in doing so displaces and ejects the spent cartridge case 78 as seen in Figure 15.
  • the next round 28 thereby is allowed to rise to a position at which it is arrested by action of the round retaining catch 30.
  • a further subsequent round 68 as shown in Figure 11 will then follow the vertical path of the next round 28 until arrested by the lugs 52 of the first feed slide 44.
  • the trigger 70 is pivotally mounted to the body by means of a pivot pin 72 and the trigger extension 71 is in turn pivotally mounted on the trigger by means of a second pivot pin 73.
  • the trigger extension 71 i ⁇ thereby pivotal between an engaging po ⁇ ition ⁇ hown in Figure 16 in which it i ⁇ operatively engaged by the sear 8 and a disengaged position as shown in Figure 18 in which it is disengaged from the sear such that any movement of the trigger when the trigger extension is in the disengaged position doe ⁇ not effect actuation of the ⁇ ear.
  • the trigger extension 71 consi ⁇ t ⁇ of a plate defining an aperture 74 ( Figure 16)through which a catch member 75 of the ⁇ ear 8 extend ⁇ in the engaged po ⁇ ition as shown in Figure 16.
  • the trigger 70 is spring biased into a forward position as shown in Figure 16.
  • the trigger extension 71 is also spring loaded relative to the trigger in a direction tending to move it into engagement with the ⁇ ear 8.
  • Figure 16 shows the trigger mechanism 69 in a ready for firing condition, corresponding to the configuration of Figure 1, such that manual actuation of the trigger so as to pivot about pivot pin 72 results in downward motion of the trigger extension 71, thereby downwardly displacing the catch member 75 and moving the sear 8 into its retracted position as shown in Figure 17 in which the breech block 2 is released so as to commence forward run out motion.
  • the trigger mechanism 69 includes a safety feature which will only allow actuation of the trigger 70 to release the sear 8 if a fresh round 1 has been fed into the breech opening 3.
  • This safety feature is achieved by interaction between a safety slide and the trigger extension 71, the safety slide in this preferred embodiment being constituted by the first feed slide 44 as shown in Figure 18.
  • the trigger extension 71 is disengaged from the sear 8 by the formation 55 during recoil of the breech block 2, it i ⁇ nece ⁇ sary for the sear to be re ⁇ engaged by the trigger formation before a further firing can commence. This nece ⁇ itates release of the trigger 70 to allow the trigger extension 71 to rise to a position where the catch member 75 can enter the aperture 74.
  • a further safety feature is therefore inherent in the trigger mechanism 69 in that the trigger 70 mu ⁇ t be separately actuated for each firing i.e. the trigger must be fully released before a next round can be fired.
  • the magazine incorporates a magazine platform 77 as shown in Figure 19 upon which the series of rounds within the magazine 29 are supported, the magazine platform 77 being spring biased by action of the magazine ⁇ pring 43 ⁇ o as to impart ⁇ pring force to the rounds in the magazine.
  • the magazine platform 77 is shaped such that it can be fed into the breech opening 3 as shown in Figure 19 when all of the rounds in the magazine have been exhausted.
  • the shape of the magazine platform 77 is however such as to prevent forward motion of the first feed slide 44.
  • the weapon may be adapted to fire rounds of larger or smaller calibre.
  • the weapon i ⁇ primarily intended for hand held u ⁇ e and to be shoulder fired.
  • the weapon may alternatively be mounted on a suitable stand or vehicle if required.
  • the spring ⁇ are helical coil springs.
  • Other form ⁇ of spring such as gas springs may be used alternatively where appropriate.
  • the first feed slide 44 also acts as the safety slide.
  • the safety slide may be formed separately from the first feed slide.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Portable Nailing Machines And Staplers (AREA)

Abstract

Arme à feu comprenant un corps (6) définissant une alésage et un ensemble canon (5, 4, 2) pouvant coulisser à l'intérieur de l'alésage dans un sens dirigé vers l'avant, ainsi que dans un sens dirigé vers l'arrière correspondant au recul de l'ensemble canon après la mise à feu. Un ressort de recul (13) fonctionne entre le corps et l'ensemble canon, afin de solliciter ledit ensemble vers l'avant. L'ensemble canon est composé d'un canon (5), d'un raccord de canon (4) situé à l'arrière du canon et d'une boîte de culasse (2) logeant coulissante dans le raccord de canon et capable de coopérer avec le canon en se déplaçant pour venir en butée vers l'avant par rapport au raccord de canon, afin de définir une chambre (7) à l'intérieur de laquelle une cartouche (1) est mise à feu. La boîte de culasse comprend, de plus, un mécanisme de mise à feu (18, 19) de la cartouche. Un mécanisme de liaison (12, 9, 10, 11) relie le corps, le raccord de canon et la boîte de culasse et sert à maintenir la boîte de culasse en position fixe par rapport au canon pendant une partie du cycle de mise à feu pendant laquelle la culasse ferme la chambre. Ce mécanisme de liaison fonctionne pendant le reste du cycle de mise à feu, de manière à produire une différence de déplacement entre la boîte de culasse et le canon, de telle sorte que la vitesse de déplacement de la boîte de culasse par rapport au corps est proportionnelle et supérieure à la vitesse de déplacement du raccord de canon par rapport au corps.
PCT/GB1996/002518 1995-10-16 1996-10-15 Arme a feu WO1997014928A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU73103/96A AU7310396A (en) 1995-10-16 1996-10-15 A weapon

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9521159.5A GB9521159D0 (en) 1995-10-16 1995-10-16 A weapon
GB9521159.5 1995-10-16

Publications (1)

Publication Number Publication Date
WO1997014928A1 true WO1997014928A1 (fr) 1997-04-24

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PCT/GB1996/002518 WO1997014928A1 (fr) 1995-10-16 1996-10-15 Arme a feu

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AU (1) AU7310396A (fr)
GB (1) GB9521159D0 (fr)
WO (1) WO1997014928A1 (fr)

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