CS198123B2 - Hunters' repeating gun with the locking breach head and swimming breach member - Google Patents

Abstract

1390476 Small arms BENELLI SpA DIVISIONE ARMI 18 July 1973 [18 July 1972] 34117/73 Heading F3C A gun for hunting comprises a bolt assembly having a locking bolt head 1 and a floating element 9 which reciprocates axially with respect to the locking bolt head 1 and unlocks the latter during movement in one of the two axial directions, and a spring 10 which is interposed between the locking bolt head 1 and the floating element 9. The locking bolt head 1 has a surface 15 provided with projections 3 which are engagable in recesses 14 provided in the cylindrical internal surface of the breech 7, a surface 16 which is engagable with a surface 13 of the floating element 9 of the bolt and slidable thereon during initial internal movement of the floating element 9 after firing so as to maintain the projections 3 in the recesses 14 of the breech 7 and thus prevent a premature opening of the breech, the surfaces 16, 13 being parallel to the breech axis, and has surfaces 8 which are inclined with respect to the breech axis and are engagable with surfaces 12 of the floating element 9 and slidable thereon during the return movement of the latter so as to permit the projections 3 to disengage from the recesses 14 in the breech. The surface 15 of the locking bolt head, the projections 3 and the recesses 14 of the breech 7 are curved. The surfaces 16 of the locking bolt head 1 and the surfaces 13 of the floating element 9 are flat. The locking bolt head 1 has a cylindrical section which closes the cartridge chamber. During firing of the gun a cartridge 2 is retained in the cartridge chamber 17 by the locking bolt head 1 as shown in Fig. 1, the projections 3 being received by the recesses 14. The floating element 9 maintains its position for a time during the recoil movement of the gun and compresses the spring 10, the latter eventually moving the floating element away from the chamber 17 to the position shown in Fig. 2, the inclined surfaces 8, 12 of the locking head 1 and the floating element 9 respectively allowing disengagement of the projections 3 from the recesses 14 so that the locking head 1 can complete its recoil movement and cartridge case 21 can be ejected. The return of the bolt assembly effects re-loading of the chamber and locking of the bolt.

Description

The present invention relates to a hunting rifle described in Italian Patent No. 762,319.

The hunting rifle according to this Italian patent is provided with a bolt consisting of two parts, a locking head of the bolt and an axially reciprocating bolt relative to the bolt head for unlocking it when moving in one of the two directions of its movement, the limit ! a spring is inserted by both said parts.

After firing, the weapon reloads due to the pressure of the gases produced by the ignition of the explosive charge in the firing cartridge, when the reciprocating member is free of the receiver and acts axially due to inertia movement of the locking bolt head. A spring inserted between the floating member and a breech head. This prevents the weapon from being unlocked during ignition of the explosive charge at the moment of the greatest gas tension and its premature opening. Only when the recoil reaches a predetermined value will the spring, due to the compression it has been subjected to the inertia of the floating member, push the float member back, causing the locking head of the breech to be unlocked, which is subjected to recoil caused partly by the spring and partly by the rest of gases. The cartridge case is then ejected in the normal way, the weapon is re-fired and the new cartridge is locked in the cartridge chamber.

In Italian Patent No. 762,319, the locking device is provided with a push rod which is in the locking position of the breech head positioned between it and the stop formed in the breech housing and is adapted to be released and carried by the reciprocating member during its return. stroke. The object is achieved according to the invention in that the locking head of the breech is provided with an outer curved surface with at least one outer curved rib, adapted to engage the corresponding internal curved grooves of the breech housing, and an inner surface corresponding to the outer a surface of the floating breech member and adapted for axial sliding movement of the swivel at its initial inertia after firing, and for keeping the outer curved ribs in engagement with their corresponding internal curved grooves, the inner surface of the locking head of the breech and the corresponding outer the surface of the floating breech member is in the locked position when engaging the outer curved ribs of the breech block locking head with corresponding internal curved · grooves of the breech housing parallel to the breech housing axis, and is further provided with an inclined surface, glass · relative to the breech housing axis toward the kqmo198123 cartridge

198123 and adapted to engage a corresponding inclined surface of the floating breech member upon subsequent retraction of the breech and disengaging the outer curved ribs and the corresponding internal curved grooves of the breech housing.

Further, according to the invention, the inner surface and the inclined surface of the locking head of the breech and the outer surface and the inclined surface of the floating breech member are planar. Also according to the invention, the inclined surface of the breech block comprises two portions provided on both sides of the outer curved surface and the inner surface of the breech block, and the corresponding inclined surface of the floating breech member also comprises two portions provided on both sides of the outer surface of the floating member. of the breech, parallel to the axis of the breech. Finally, according to the invention, the locking head consists of a cylindrical face and a flat shaft extending therefrom on which an outer curved surface with at least one outer curved rib is provided, an inner surface and an inclined surface, the flat shaft being mounted in an axial U-shaped recess.

According to the present invention, a breech receiver has been provided with a breech block locking head and a floating breech member reciprocating axially movable therethrough, adapted to unlock the breech head when moving in one of two directions of movement thereof and with a spring inserted between the breech block. the known arrangement shown in Italian Pat. No. 762 319 substantially simpler. The former weapon locking assembly consists of three parts, a floating member, a locking head and a push rod, whereas only two parts of the locking head and a floating member are used according to the invention. In connection with this, the production of the locking system of the weapon is easier and more economical.

BRIEF DESCRIPTION OF THE DRAWINGS The invention will now be described, by way of example, with reference to the drawings, in which: Figure 1 is a partial elevational view of a hunting rifle according to the invention at the time of firing;

FIG. 2 is a partial axial sectional view of the hunting rifle of FIG. 1 at the time the bolt is unlocked;

FIG. 2 is a side view of the locking head of the weapon of FIGS. 1 and 2;

FIG. 3B is a plan view of the locking head of the breech head of FIG. 2A; and FIG. 4 is a front cross-sectional view of the floating member of the weapon of FIGS. 1 and 2.

Fig. 1 shows the locking head 1 of the receiver of the hunter repeater after firing, closing the cartridge 2 in the cartridge chamber 17 by engaging three outer curved ribs

3 protruding from the outer curved surface 15 of the breech locking head 1, with corresponding internal curved grooves 14 (FIG. 2) formed in the breech housing 7. This conclusion is provided by engagement of the outer face 13 (FIG. 4) formed on the floating slide member 9 with the inner face 16 (FIG. 2A) of the locking head 1 of the slide. The breech block locking head 1 is also provided with two inclined faces S (FIG. 2A, ЗВ) adapted to engage corresponding inclined faces 12 of the floating breech member 9 (FIG. 4).

The outer curved surface 15 is provided on a flat shaft 52 extending from the cylindrical face 51 of the hinge locking head 1 and mounted in the U-shaped axial recess 53 of the floating hinge member 9.

In Fig. 1 the weapon is shown at the moment of firing. The firing pin 18 is brought into contact with the firing pin 19 by the trigger (not shown), which causes it to explode by impacting the explosive charge of the cartridge 21, generating gases and expelling the projectile 20. The weapon reloads in response to the shooter's shoulder. which is out of engagement with the rest of the weapon, tends to maintain its own position while compressing the compression spring 10 interposed therebetween and the locking head 1 of the breech. In this case, the inner surface 16 of the slide lock head 1 slides over the outer surface 13 of the floating slide member 9, which keeps the slide lock head 1 in the position shown in Fig. 1, in which the outer curved ribs 3 are engaged with the inner curved grooves 14 . Thereby, the locking head 1 of the breech locks and closes the cartridge chamber 17. This also delays the opening of the cartridge chamber 17, which prevents the weapon from unlocking when the cartridge cartridge 21 bursts at the moment of the greatest gas tension. As a result, the weapon will not open prematurely.

As soon as the recoil force drops to a predetermined value corresponding to the resistance of the compression spring 10, the slide 9 is pushed back by the force of its compression and once the inclined surfaces 12 of the slide 9 are located on the inclined surfaces 8 of the lock head 1. the slide lock head 1 can be inclined due to the relative sliding movement of the corresponding surfaces relative to the slide housing 7 until the outer curved ribs 3 of the slide lock head 1 come out of engagement with its inner curved grooves 14. The slide lock head 1 can also bounce due to residual force The compression springs 10 and the pressure of the remaining gases open the chamber 17 and allow the cartridge 21 to be ejected. The described reverse movement of the breech member 9 and the breech locking head 1 is shown in FIG. 2.

During the return stroke, the locking head of the breech reloads normally and locks the weapon, which is ready for the next shot. Although one embodiment of the invention has been shown, it is possible to modify and adapt it and all such modifications are within its scope. For example, if in the described embodiment of the invention three outer curved ribs 3 are shown on the breech locking head 1 and three internal curved grooves 14 in the breech housing 7 for their acceptance, their number may be reduced, for example, to one without departing from the scope of the invention.

Claims (4)

1. A hunter repeater with a breech block and a floating breech member, reciprocating axially movable thereto and adapted to unlock the breech head when moving in one of the two directions of movement thereof, and with a spring inserted between the breech block and the breech member, the breech block locking head (1) is provided with an outer curved surface (15) with at least one outer curved rib (3) adapted to engage corresponding internal curved grooves (14) of the breech housing (7), an inner surface (16) adapted for axial sliding along a corresponding outer surface (13) of the floating slide member (9) at its initial inertial position after firing and for holding the outer curved ribs (3) in engagement with their respective inner curved grooves (14), the inner surface (16) locking bolt heads (1) and corresponding outer surface (13) the floating breech member (9) are in the locking position when engaging the outer curved ribs (3) with corresponding internal curved grooves (14) of the breech housing (7) parallel to the axis of the breech housing (7), and further provided with an inclined surface (8) inclined relative to the axis of the breech housing (7) towards the cartridge chamber (17) and adapted to engage a corresponding inclined surface (12) of the breech member (9) upon subsequent retraction, breech movement and release of the outer curved ribs (3) from engagement with the corresponding internal curved grooves (14) of the receiver (7). Hunting repeater according to claim 1, characterized in that the inner surface (16) and the inclined surface (8) of the breech block locking head (1) and the outer surface (13) and the inclined surface (12) of the floating breech member (9) are planar. Hunting repeater according to Claims 1 and 2, characterized in that the inclined surface (8) of the locking head (1) consists of two parts provided on either side of the outer curved surface (15) and the inner surface (16) of the locking device. the slide head (1), and the corresponding inclined surface (12) of the floating slide member (9) also consists of two parts provided on both sides of the outer surface (13) of the floating slide member (9), also parallel to the housing axis (7) ) conclusion. Hunting repeater according to one of Claims 1 to 3, characterized in that the locking head (1) of the breech consists of a cylindrical face (31) and a flat shaft (52) extending therefrom on which an outer curved surface (15) is provided with at least one outer a curved rib (3), an inner surface (16) and an inclined surface (8), the flat shaft (52) being received in an axial recess (53) of the U-shaped floating breech member (9).